/* * ntp_control.c - respond to mode 6 control messages and send async * traps. Provides service to ntpq and others. */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include #include #ifdef HAVE_NETINET_IN_H # include #endif #include #include "ntpd.h" #include "ntp_io.h" #include "ntp_refclock.h" #include "ntp_control.h" #include "ntp_unixtime.h" #include "ntp_stdlib.h" #include "ntp_config.h" #include "ntp_crypto.h" #include "ntp_assert.h" #include "ntp_leapsec.h" #include "timexsup.h" #include #ifdef KERNEL_PLL # include "ntp_syscall.h" #endif /* * Structure to hold request procedure information */ struct ctl_proc { short control_code; /* defined request code */ #define NO_REQUEST (-1) u_short flags; /* flags word */ /* Only one flag. Authentication required or not. */ #define NOAUTH 0 #define AUTH 1 void (*handler) (struct recvbuf *, int); /* handle request */ }; /* * Request processing routines */ static void ctl_error (u_char); #ifdef REFCLOCK static u_short ctlclkstatus (struct refclockstat *); #endif static void ctl_flushpkt (u_char); static void ctl_putdata (const char *, unsigned int, int); static void ctl_putstr (const char *, const char *, size_t); static void ctl_putdblf (const char *, int, int, double); #define ctl_putdbl(tag, d) ctl_putdblf(tag, 1, 3, d) #define ctl_putdbl6(tag, d) ctl_putdblf(tag, 1, 6, d) #define ctl_putsfp(tag, sfp) ctl_putdblf(tag, 0, -1, \ FPTOD(sfp)) static void ctl_putuint (const char *, u_long); static void ctl_puthex (const char *, u_long); static void ctl_putint (const char *, long); static void ctl_putts (const char *, l_fp *); static void ctl_putadr (const char *, u_int32, sockaddr_u *); static void ctl_putrefid (const char *, u_int32); static void ctl_putarray (const char *, double *, int); static void ctl_putsys (int); static void ctl_putpeer (int, struct peer *); static void ctl_putfs (const char *, tstamp_t); static void ctl_printf (const char *, ...) NTP_PRINTF(1, 2); #ifdef REFCLOCK static void ctl_putclock (int, struct refclockstat *, int); #endif /* REFCLOCK */ static const struct ctl_var *ctl_getitem(const struct ctl_var *, char **); static u_short count_var (const struct ctl_var *); static void control_unspec (struct recvbuf *, int); static void read_status (struct recvbuf *, int); static void read_sysvars (void); static void read_peervars (void); static void read_variables (struct recvbuf *, int); static void write_variables (struct recvbuf *, int); static void read_clockstatus(struct recvbuf *, int); static void write_clockstatus(struct recvbuf *, int); static void set_trap (struct recvbuf *, int); static void save_config (struct recvbuf *, int); static void configure (struct recvbuf *, int); static void send_mru_entry (mon_entry *, int); static void send_random_tag_value(int); static void read_mru_list (struct recvbuf *, int); static void send_ifstats_entry(endpt *, u_int); static void read_ifstats (struct recvbuf *); static void sockaddrs_from_restrict_u(sockaddr_u *, sockaddr_u *, restrict_u *, int); static void send_restrict_entry(restrict_u *, int, u_int); static void send_restrict_list(restrict_u *, int, u_int *); static void read_addr_restrictions(struct recvbuf *); static void read_ordlist (struct recvbuf *, int); static u_int32 derive_nonce (sockaddr_u *, u_int32, u_int32); static void generate_nonce (struct recvbuf *, char *, size_t); static int validate_nonce (const char *, struct recvbuf *); static void req_nonce (struct recvbuf *, int); static void unset_trap (struct recvbuf *, int); static struct ctl_trap *ctlfindtrap(sockaddr_u *, endpt *); int/*BOOL*/ is_safe_filename(const char * name); static const struct ctl_proc control_codes[] = { { CTL_OP_UNSPEC, NOAUTH, control_unspec }, { CTL_OP_READSTAT, NOAUTH, read_status }, { CTL_OP_READVAR, NOAUTH, read_variables }, { CTL_OP_WRITEVAR, AUTH, write_variables }, { CTL_OP_READCLOCK, NOAUTH, read_clockstatus }, { CTL_OP_WRITECLOCK, AUTH, write_clockstatus }, { CTL_OP_SETTRAP, AUTH, set_trap }, { CTL_OP_CONFIGURE, AUTH, configure }, { CTL_OP_SAVECONFIG, AUTH, save_config }, { CTL_OP_READ_MRU, NOAUTH, read_mru_list }, { CTL_OP_READ_ORDLIST_A, AUTH, read_ordlist }, { CTL_OP_REQ_NONCE, NOAUTH, req_nonce }, { CTL_OP_UNSETTRAP, AUTH, unset_trap }, { NO_REQUEST, 0, NULL } }; /* * System variables we understand */ #define CS_LEAP 1 #define CS_STRATUM 2 #define CS_PRECISION 3 #define CS_ROOTDELAY 4 #define CS_ROOTDISPERSION 5 #define CS_REFID 6 #define CS_REFTIME 7 #define CS_POLL 8 #define CS_PEERID 9 #define CS_OFFSET 10 #define CS_DRIFT 11 #define CS_JITTER 12 #define CS_ERROR 13 #define CS_CLOCK 14 #define CS_PROCESSOR 15 #define CS_SYSTEM 16 #define CS_VERSION 17 #define CS_STABIL 18 #define CS_VARLIST 19 #define CS_TAI 20 #define CS_LEAPTAB 21 #define CS_LEAPEND 22 #define CS_RATE 23 #define CS_MRU_ENABLED 24 #define CS_MRU_DEPTH 25 #define CS_MRU_DEEPEST 26 #define CS_MRU_MINDEPTH 27 #define CS_MRU_MAXAGE 28 #define CS_MRU_MAXDEPTH 29 #define CS_MRU_MEM 30 #define CS_MRU_MAXMEM 31 #define CS_SS_UPTIME 32 #define CS_SS_RESET 33 #define CS_SS_RECEIVED 34 #define CS_SS_THISVER 35 #define CS_SS_OLDVER 36 #define CS_SS_BADFORMAT 37 #define CS_SS_BADAUTH 38 #define CS_SS_DECLINED 39 #define CS_SS_RESTRICTED 40 #define CS_SS_LIMITED 41 #define CS_SS_KODSENT 42 #define CS_SS_PROCESSED 43 #define CS_SS_LAMPORT 44 #define CS_SS_TSROUNDING 45 #define CS_PEERADR 46 #define CS_PEERMODE 47 #define CS_BCASTDELAY 48 #define CS_AUTHDELAY 49 #define CS_AUTHKEYS 50 #define CS_AUTHFREEK 51 #define CS_AUTHKLOOKUPS 52 #define CS_AUTHKNOTFOUND 53 #define CS_AUTHKUNCACHED 54 #define CS_AUTHKEXPIRED 55 #define CS_AUTHENCRYPTS 56 #define CS_AUTHDECRYPTS 57 #define CS_AUTHRESET 58 #define CS_K_OFFSET 59 #define CS_K_FREQ 60 #define CS_K_MAXERR 61 #define CS_K_ESTERR 62 #define CS_K_STFLAGS 63 #define CS_K_TIMECONST 64 #define CS_K_PRECISION 65 #define CS_K_FREQTOL 66 #define CS_K_PPS_FREQ 67 #define CS_K_PPS_STABIL 68 #define CS_K_PPS_JITTER 69 #define CS_K_PPS_CALIBDUR 70 #define CS_K_PPS_CALIBS 71 #define CS_K_PPS_CALIBERRS 72 #define CS_K_PPS_JITEXC 73 #define CS_K_PPS_STBEXC 74 #define CS_KERN_FIRST CS_K_OFFSET #define CS_KERN_LAST CS_K_PPS_STBEXC #define CS_IOSTATS_RESET 75 #define CS_TOTAL_RBUF 76 #define CS_FREE_RBUF 77 #define CS_USED_RBUF 78 #define CS_RBUF_LOWATER 79 #define CS_IO_DROPPED 80 #define CS_IO_IGNORED 81 #define CS_IO_RECEIVED 82 #define CS_IO_SENT 83 #define CS_IO_SENDFAILED 84 #define CS_IO_WAKEUPS 85 #define CS_IO_GOODWAKEUPS 86 #define CS_TIMERSTATS_RESET 87 #define CS_TIMER_OVERRUNS 88 #define CS_TIMER_XMTS 89 #define CS_FUZZ 90 #define CS_WANDER_THRESH 91 #define CS_LEAPSMEARINTV 92 #define CS_LEAPSMEAROFFS 93 #define CS_MAX_NOAUTOKEY CS_LEAPSMEAROFFS #ifdef AUTOKEY #define CS_FLAGS (1 + CS_MAX_NOAUTOKEY) #define CS_HOST (2 + CS_MAX_NOAUTOKEY) #define CS_PUBLIC (3 + CS_MAX_NOAUTOKEY) #define CS_CERTIF (4 + CS_MAX_NOAUTOKEY) #define CS_SIGNATURE (5 + CS_MAX_NOAUTOKEY) #define CS_REVTIME (6 + CS_MAX_NOAUTOKEY) #define CS_IDENT (7 + CS_MAX_NOAUTOKEY) #define CS_DIGEST (8 + CS_MAX_NOAUTOKEY) #define CS_MAXCODE CS_DIGEST #else /* !AUTOKEY follows */ #define CS_MAXCODE CS_MAX_NOAUTOKEY #endif /* !AUTOKEY */ /* * Peer variables we understand */ #define CP_CONFIG 1 #define CP_AUTHENABLE 2 #define CP_AUTHENTIC 3 #define CP_SRCADR 4 #define CP_SRCPORT 5 #define CP_DSTADR 6 #define CP_DSTPORT 7 #define CP_LEAP 8 #define CP_HMODE 9 #define CP_STRATUM 10 #define CP_PPOLL 11 #define CP_HPOLL 12 #define CP_PRECISION 13 #define CP_ROOTDELAY 14 #define CP_ROOTDISPERSION 15 #define CP_REFID 16 #define CP_REFTIME 17 #define CP_ORG 18 #define CP_REC 19 #define CP_XMT 20 #define CP_REACH 21 #define CP_UNREACH 22 #define CP_TIMER 23 #define CP_DELAY 24 #define CP_OFFSET 25 #define CP_JITTER 26 #define CP_DISPERSION 27 #define CP_KEYID 28 #define CP_FILTDELAY 29 #define CP_FILTOFFSET 30 #define CP_PMODE 31 #define CP_RECEIVED 32 #define CP_SENT 33 #define CP_FILTERROR 34 #define CP_FLASH 35 #define CP_TTL 36 #define CP_VARLIST 37 #define CP_IN 38 #define CP_OUT 39 #define CP_RATE 40 #define CP_BIAS 41 #define CP_SRCHOST 42 #define CP_TIMEREC 43 #define CP_TIMEREACH 44 #define CP_BADAUTH 45 #define CP_BOGUSORG 46 #define CP_OLDPKT 47 #define CP_SELDISP 48 #define CP_SELBROKEN 49 #define CP_CANDIDATE 50 #define CP_MAX_NOAUTOKEY CP_CANDIDATE #ifdef AUTOKEY #define CP_FLAGS (1 + CP_MAX_NOAUTOKEY) #define CP_HOST (2 + CP_MAX_NOAUTOKEY) #define CP_VALID (3 + CP_MAX_NOAUTOKEY) #define CP_INITSEQ (4 + CP_MAX_NOAUTOKEY) #define CP_INITKEY (5 + CP_MAX_NOAUTOKEY) #define CP_INITTSP (6 + CP_MAX_NOAUTOKEY) #define CP_SIGNATURE (7 + CP_MAX_NOAUTOKEY) #define CP_IDENT (8 + CP_MAX_NOAUTOKEY) #define CP_MAXCODE CP_IDENT #else /* !AUTOKEY follows */ #define CP_MAXCODE CP_MAX_NOAUTOKEY #endif /* !AUTOKEY */ /* * Clock variables we understand */ #define CC_TYPE 1 #define CC_TIMECODE 2 #define CC_POLL 3 #define CC_NOREPLY 4 #define CC_BADFORMAT 5 #define CC_BADDATA 6 #define CC_FUDGETIME1 7 #define CC_FUDGETIME2 8 #define CC_FUDGEVAL1 9 #define CC_FUDGEVAL2 10 #define CC_FLAGS 11 #define CC_DEVICE 12 #define CC_VARLIST 13 #define CC_FUDGEMINJIT 14 #define CC_MAXCODE CC_FUDGEMINJIT /* * System variable values. The array can be indexed by the variable * index to find the textual name. */ static const struct ctl_var sys_var[] = { { 0, PADDING, "" }, /* 0 */ { CS_LEAP, RW, "leap" }, /* 1 */ { CS_STRATUM, RO, "stratum" }, /* 2 */ { CS_PRECISION, RO, "precision" }, /* 3 */ { CS_ROOTDELAY, RO, "rootdelay" }, /* 4 */ { CS_ROOTDISPERSION, RO, "rootdisp" }, /* 5 */ { CS_REFID, RO, "refid" }, /* 6 */ { CS_REFTIME, RO, "reftime" }, /* 7 */ { CS_POLL, RO, "tc" }, /* 8 */ { CS_PEERID, RO, "peer" }, /* 9 */ { CS_OFFSET, RO, "offset" }, /* 10 */ { CS_DRIFT, RO, "frequency" }, /* 11 */ { CS_JITTER, RO, "sys_jitter" }, /* 12 */ { CS_ERROR, RO, "clk_jitter" }, /* 13 */ { CS_CLOCK, RO, "clock" }, /* 14 */ { CS_PROCESSOR, RO, "processor" }, /* 15 */ { CS_SYSTEM, RO, "system" }, /* 16 */ { CS_VERSION, RO, "version" }, /* 17 */ { CS_STABIL, RO, "clk_wander" }, /* 18 */ { CS_VARLIST, RO, "sys_var_list" }, /* 19 */ { CS_TAI, RO, "tai" }, /* 20 */ { CS_LEAPTAB, RO, "leapsec" }, /* 21 */ { CS_LEAPEND, RO, "expire" }, /* 22 */ { CS_RATE, RO, "mintc" }, /* 23 */ { CS_MRU_ENABLED, RO, "mru_enabled" }, /* 24 */ { CS_MRU_DEPTH, RO, "mru_depth" }, /* 25 */ { CS_MRU_DEEPEST, RO, "mru_deepest" }, /* 26 */ { CS_MRU_MINDEPTH, RO, "mru_mindepth" }, /* 27 */ { CS_MRU_MAXAGE, RO, "mru_maxage" }, /* 28 */ { CS_MRU_MAXDEPTH, RO, "mru_maxdepth" }, /* 29 */ { CS_MRU_MEM, RO, "mru_mem" }, /* 30 */ { CS_MRU_MAXMEM, RO, "mru_maxmem" }, /* 31 */ { CS_SS_UPTIME, RO, "ss_uptime" }, /* 32 */ { CS_SS_RESET, RO, "ss_reset" }, /* 33 */ { CS_SS_RECEIVED, RO, "ss_received" }, /* 34 */ { CS_SS_THISVER, RO, "ss_thisver" }, /* 35 */ { CS_SS_OLDVER, RO, "ss_oldver" }, /* 36 */ { CS_SS_BADFORMAT, RO, "ss_badformat" }, /* 37 */ { CS_SS_BADAUTH, RO, "ss_badauth" }, /* 38 */ { CS_SS_DECLINED, RO, "ss_declined" }, /* 39 */ { CS_SS_RESTRICTED, RO, "ss_restricted" }, /* 40 */ { CS_SS_LIMITED, RO, "ss_limited" }, /* 41 */ { CS_SS_KODSENT, RO, "ss_kodsent" }, /* 42 */ { CS_SS_PROCESSED, RO, "ss_processed" }, /* 43 */ { CS_SS_LAMPORT, RO, "ss_lamport" }, /* 44 */ { CS_SS_TSROUNDING, RO, "ss_tsrounding" }, /* 45 */ { CS_PEERADR, RO, "peeradr" }, /* 46 */ { CS_PEERMODE, RO, "peermode" }, /* 47 */ { CS_BCASTDELAY, RO, "bcastdelay" }, /* 48 */ { CS_AUTHDELAY, RO, "authdelay" }, /* 49 */ { CS_AUTHKEYS, RO, "authkeys" }, /* 50 */ { CS_AUTHFREEK, RO, "authfreek" }, /* 51 */ { CS_AUTHKLOOKUPS, RO, "authklookups" }, /* 52 */ { CS_AUTHKNOTFOUND, RO, "authknotfound" }, /* 53 */ { CS_AUTHKUNCACHED, RO, "authkuncached" }, /* 54 */ { CS_AUTHKEXPIRED, RO, "authkexpired" }, /* 55 */ { CS_AUTHENCRYPTS, RO, "authencrypts" }, /* 56 */ { CS_AUTHDECRYPTS, RO, "authdecrypts" }, /* 57 */ { CS_AUTHRESET, RO, "authreset" }, /* 58 */ { CS_K_OFFSET, RO, "koffset" }, /* 59 */ { CS_K_FREQ, RO, "kfreq" }, /* 60 */ { CS_K_MAXERR, RO, "kmaxerr" }, /* 61 */ { CS_K_ESTERR, RO, "kesterr" }, /* 62 */ { CS_K_STFLAGS, RO, "kstflags" }, /* 63 */ { CS_K_TIMECONST, RO, "ktimeconst" }, /* 64 */ { CS_K_PRECISION, RO, "kprecis" }, /* 65 */ { CS_K_FREQTOL, RO, "kfreqtol" }, /* 66 */ { CS_K_PPS_FREQ, RO, "kppsfreq" }, /* 67 */ { CS_K_PPS_STABIL, RO, "kppsstab" }, /* 68 */ { CS_K_PPS_JITTER, RO, "kppsjitter" }, /* 69 */ { CS_K_PPS_CALIBDUR, RO, "kppscalibdur" }, /* 70 */ { CS_K_PPS_CALIBS, RO, "kppscalibs" }, /* 71 */ { CS_K_PPS_CALIBERRS, RO, "kppscaliberrs" }, /* 72 */ { CS_K_PPS_JITEXC, RO, "kppsjitexc" }, /* 73 */ { CS_K_PPS_STBEXC, RO, "kppsstbexc" }, /* 74 */ { CS_IOSTATS_RESET, RO, "iostats_reset" }, /* 75 */ { CS_TOTAL_RBUF, RO, "total_rbuf" }, /* 76 */ { CS_FREE_RBUF, RO, "free_rbuf" }, /* 77 */ { CS_USED_RBUF, RO, "used_rbuf" }, /* 78 */ { CS_RBUF_LOWATER, RO, "rbuf_lowater" }, /* 79 */ { CS_IO_DROPPED, RO, "io_dropped" }, /* 80 */ { CS_IO_IGNORED, RO, "io_ignored" }, /* 81 */ { CS_IO_RECEIVED, RO, "io_received" }, /* 82 */ { CS_IO_SENT, RO, "io_sent" }, /* 83 */ { CS_IO_SENDFAILED, RO, "io_sendfailed" }, /* 84 */ { CS_IO_WAKEUPS, RO, "io_wakeups" }, /* 85 */ { CS_IO_GOODWAKEUPS, RO, "io_goodwakeups" }, /* 86 */ { CS_TIMERSTATS_RESET, RO, "timerstats_reset" },/* 87 */ { CS_TIMER_OVERRUNS, RO, "timer_overruns" }, /* 88 */ { CS_TIMER_XMTS, RO, "timer_xmts" }, /* 89 */ { CS_FUZZ, RO, "fuzz" }, /* 90 */ { CS_WANDER_THRESH, RO, "clk_wander_threshold" }, /* 91 */ { CS_LEAPSMEARINTV, RO, "leapsmearinterval" }, /* 92 */ { CS_LEAPSMEAROFFS, RO, "leapsmearoffset" }, /* 93 */ #ifdef AUTOKEY { CS_FLAGS, RO, "flags" }, /* 1 + CS_MAX_NOAUTOKEY */ { CS_HOST, RO, "host" }, /* 2 + CS_MAX_NOAUTOKEY */ { CS_PUBLIC, RO, "update" }, /* 3 + CS_MAX_NOAUTOKEY */ { CS_CERTIF, RO, "cert" }, /* 4 + CS_MAX_NOAUTOKEY */ { CS_SIGNATURE, RO, "signature" }, /* 5 + CS_MAX_NOAUTOKEY */ { CS_REVTIME, RO, "until" }, /* 6 + CS_MAX_NOAUTOKEY */ { CS_IDENT, RO, "ident" }, /* 7 + CS_MAX_NOAUTOKEY */ { CS_DIGEST, RO, "digest" }, /* 8 + CS_MAX_NOAUTOKEY */ #endif /* AUTOKEY */ { 0, EOV, "" } /* 94/102 */ }; static struct ctl_var *ext_sys_var = NULL; /* * System variables we print by default (in fuzzball order, * more-or-less) */ static const u_char def_sys_var[] = { CS_VERSION, CS_PROCESSOR, CS_SYSTEM, CS_LEAP, CS_STRATUM, CS_PRECISION, CS_ROOTDELAY, CS_ROOTDISPERSION, CS_REFID, CS_REFTIME, CS_CLOCK, CS_PEERID, CS_POLL, CS_RATE, CS_OFFSET, CS_DRIFT, CS_JITTER, CS_ERROR, CS_STABIL, CS_TAI, CS_LEAPTAB, CS_LEAPEND, CS_LEAPSMEARINTV, CS_LEAPSMEAROFFS, #ifdef AUTOKEY CS_HOST, CS_IDENT, CS_FLAGS, CS_DIGEST, CS_SIGNATURE, CS_PUBLIC, CS_CERTIF, #endif /* AUTOKEY */ 0 }; /* * Peer variable list */ static const struct ctl_var peer_var[] = { { 0, PADDING, "" }, /* 0 */ { CP_CONFIG, RO, "config" }, /* 1 */ { CP_AUTHENABLE, RO, "authenable" }, /* 2 */ { CP_AUTHENTIC, RO, "authentic" }, /* 3 */ { CP_SRCADR, RO, "srcadr" }, /* 4 */ { CP_SRCPORT, RO, "srcport" }, /* 5 */ { CP_DSTADR, RO, "dstadr" }, /* 6 */ { CP_DSTPORT, RO, "dstport" }, /* 7 */ { CP_LEAP, RO, "leap" }, /* 8 */ { CP_HMODE, RO, "hmode" }, /* 9 */ { CP_STRATUM, RO, "stratum" }, /* 10 */ { CP_PPOLL, RO, "ppoll" }, /* 11 */ { CP_HPOLL, RO, "hpoll" }, /* 12 */ { CP_PRECISION, RO, "precision" }, /* 13 */ { CP_ROOTDELAY, RO, "rootdelay" }, /* 14 */ { CP_ROOTDISPERSION, RO, "rootdisp" }, /* 15 */ { CP_REFID, RO, "refid" }, /* 16 */ { CP_REFTIME, RO, "reftime" }, /* 17 */ { CP_ORG, RO, "org" }, /* 18 */ { CP_REC, RO, "rec" }, /* 19 */ { CP_XMT, RO, "xleave" }, /* 20 */ { CP_REACH, RO, "reach" }, /* 21 */ { CP_UNREACH, RO, "unreach" }, /* 22 */ { CP_TIMER, RO, "timer" }, /* 23 */ { CP_DELAY, RO, "delay" }, /* 24 */ { CP_OFFSET, RO, "offset" }, /* 25 */ { CP_JITTER, RO, "jitter" }, /* 26 */ { CP_DISPERSION, RO, "dispersion" }, /* 27 */ { CP_KEYID, RO, "keyid" }, /* 28 */ { CP_FILTDELAY, RO, "filtdelay" }, /* 29 */ { CP_FILTOFFSET, RO, "filtoffset" }, /* 30 */ { CP_PMODE, RO, "pmode" }, /* 31 */ { CP_RECEIVED, RO, "received"}, /* 32 */ { CP_SENT, RO, "sent" }, /* 33 */ { CP_FILTERROR, RO, "filtdisp" }, /* 34 */ { CP_FLASH, RO, "flash" }, /* 35 */ { CP_TTL, RO, "ttl" }, /* 36 */ { CP_VARLIST, RO, "peer_var_list" }, /* 37 */ { CP_IN, RO, "in" }, /* 38 */ { CP_OUT, RO, "out" }, /* 39 */ { CP_RATE, RO, "headway" }, /* 40 */ { CP_BIAS, RO, "bias" }, /* 41 */ { CP_SRCHOST, RO, "srchost" }, /* 42 */ { CP_TIMEREC, RO, "timerec" }, /* 43 */ { CP_TIMEREACH, RO, "timereach" }, /* 44 */ { CP_BADAUTH, RO, "badauth" }, /* 45 */ { CP_BOGUSORG, RO, "bogusorg" }, /* 46 */ { CP_OLDPKT, RO, "oldpkt" }, /* 47 */ { CP_SELDISP, RO, "seldisp" }, /* 48 */ { CP_SELBROKEN, RO, "selbroken" }, /* 49 */ { CP_CANDIDATE, RO, "candidate" }, /* 50 */ #ifdef AUTOKEY { CP_FLAGS, RO, "flags" }, /* 1 + CP_MAX_NOAUTOKEY */ { CP_HOST, RO, "host" }, /* 2 + CP_MAX_NOAUTOKEY */ { CP_VALID, RO, "valid" }, /* 3 + CP_MAX_NOAUTOKEY */ { CP_INITSEQ, RO, "initsequence" }, /* 4 + CP_MAX_NOAUTOKEY */ { CP_INITKEY, RO, "initkey" }, /* 5 + CP_MAX_NOAUTOKEY */ { CP_INITTSP, RO, "timestamp" }, /* 6 + CP_MAX_NOAUTOKEY */ { CP_SIGNATURE, RO, "signature" }, /* 7 + CP_MAX_NOAUTOKEY */ { CP_IDENT, RO, "ident" }, /* 8 + CP_MAX_NOAUTOKEY */ #endif /* AUTOKEY */ { 0, EOV, "" } /* 50/58 */ }; /* * Peer variables we print by default */ static const u_char def_peer_var[] = { CP_SRCADR, CP_SRCPORT, CP_SRCHOST, CP_DSTADR, CP_DSTPORT, CP_OUT, CP_IN, CP_LEAP, CP_STRATUM, CP_PRECISION, CP_ROOTDELAY, CP_ROOTDISPERSION, CP_REFID, CP_REFTIME, CP_REC, CP_REACH, CP_UNREACH, CP_HMODE, CP_PMODE, CP_HPOLL, CP_PPOLL, CP_RATE, CP_FLASH, CP_KEYID, CP_TTL, CP_OFFSET, CP_DELAY, CP_DISPERSION, CP_JITTER, CP_XMT, CP_BIAS, CP_FILTDELAY, CP_FILTOFFSET, CP_FILTERROR, #ifdef AUTOKEY CP_HOST, CP_FLAGS, CP_SIGNATURE, CP_VALID, CP_INITSEQ, CP_IDENT, #endif /* AUTOKEY */ 0 }; #ifdef REFCLOCK /* * Clock variable list */ static const struct ctl_var clock_var[] = { { 0, PADDING, "" }, /* 0 */ { CC_TYPE, RO, "type" }, /* 1 */ { CC_TIMECODE, RO, "timecode" }, /* 2 */ { CC_POLL, RO, "poll" }, /* 3 */ { CC_NOREPLY, RO, "noreply" }, /* 4 */ { CC_BADFORMAT, RO, "badformat" }, /* 5 */ { CC_BADDATA, RO, "baddata" }, /* 6 */ { CC_FUDGETIME1, RO, "fudgetime1" }, /* 7 */ { CC_FUDGETIME2, RO, "fudgetime2" }, /* 8 */ { CC_FUDGEVAL1, RO, "stratum" }, /* 9 */ { CC_FUDGEVAL2, RO, "refid" }, /* 10 */ { CC_FLAGS, RO, "flags" }, /* 11 */ { CC_DEVICE, RO, "device" }, /* 12 */ { CC_VARLIST, RO, "clock_var_list" }, /* 13 */ { CC_FUDGEMINJIT, RO, "minjitter" }, /* 14 */ { 0, EOV, "" } /* 15 */ }; /* * Clock variables printed by default */ static const u_char def_clock_var[] = { CC_DEVICE, CC_TYPE, /* won't be output if device = known */ CC_TIMECODE, CC_POLL, CC_NOREPLY, CC_BADFORMAT, CC_BADDATA, CC_FUDGEMINJIT, CC_FUDGETIME1, CC_FUDGETIME2, CC_FUDGEVAL1, CC_FUDGEVAL2, CC_FLAGS, 0 }; #endif /* * MRU string constants shared by send_mru_entry() and read_mru_list(). */ static const char addr_fmt[] = "addr.%d"; static const char last_fmt[] = "last.%d"; /* * System and processor definitions. */ #ifndef HAVE_UNAME # ifndef STR_SYSTEM # define STR_SYSTEM "UNIX" # endif # ifndef STR_PROCESSOR # define STR_PROCESSOR "unknown" # endif static const char str_system[] = STR_SYSTEM; static const char str_processor[] = STR_PROCESSOR; #else # include static struct utsname utsnamebuf; #endif /* HAVE_UNAME */ /* * Trap structures. We only allow a few of these, and send a copy of * each async message to each live one. Traps time out after an hour, it * is up to the trap receipient to keep resetting it to avoid being * timed out. */ /* ntp_request.c */ struct ctl_trap ctl_traps[CTL_MAXTRAPS]; int num_ctl_traps; /* * Type bits, for ctlsettrap() call. */ #define TRAP_TYPE_CONFIG 0 /* used by configuration code */ #define TRAP_TYPE_PRIO 1 /* priority trap */ #define TRAP_TYPE_NONPRIO 2 /* nonpriority trap */ /* * List relating reference clock types to control message time sources. * Index by the reference clock type. This list will only be used iff * the reference clock driver doesn't set peer->sstclktype to something * different than CTL_SST_TS_UNSPEC. */ #ifdef REFCLOCK static const u_char clocktypes[] = { CTL_SST_TS_NTP, /* REFCLK_NONE (0) */ CTL_SST_TS_LOCAL, /* REFCLK_LOCALCLOCK (1) */ CTL_SST_TS_UHF, /* deprecated REFCLK_GPS_TRAK (2) */ CTL_SST_TS_HF, /* REFCLK_WWV_PST (3) */ CTL_SST_TS_LF, /* REFCLK_WWVB_SPECTRACOM (4) */ CTL_SST_TS_UHF, /* REFCLK_TRUETIME (5) */ CTL_SST_TS_UHF, /* REFCLK_IRIG_AUDIO (6) */ CTL_SST_TS_HF, /* REFCLK_CHU (7) */ CTL_SST_TS_LF, /* REFCLOCK_PARSE (default) (8) */ CTL_SST_TS_LF, /* REFCLK_GPS_MX4200 (9) */ CTL_SST_TS_UHF, /* REFCLK_GPS_AS2201 (10) */ CTL_SST_TS_UHF, /* REFCLK_GPS_ARBITER (11) */ CTL_SST_TS_UHF, /* REFCLK_IRIG_TPRO (12) */ CTL_SST_TS_ATOM, /* REFCLK_ATOM_LEITCH (13) */ CTL_SST_TS_LF, /* deprecated REFCLK_MSF_EES (14) */ CTL_SST_TS_NTP, /* not used (15) */ CTL_SST_TS_UHF, /* REFCLK_IRIG_BANCOMM (16) */ CTL_SST_TS_UHF, /* REFCLK_GPS_DATU (17) */ CTL_SST_TS_TELEPHONE, /* REFCLK_NIST_ACTS (18) */ CTL_SST_TS_HF, /* REFCLK_WWV_HEATH (19) */ CTL_SST_TS_UHF, /* REFCLK_GPS_NMEA (20) */ CTL_SST_TS_UHF, /* REFCLK_GPS_VME (21) */ CTL_SST_TS_ATOM, /* REFCLK_ATOM_PPS (22) */ CTL_SST_TS_NTP, /* not used (23) */ CTL_SST_TS_NTP, /* not used (24) */ CTL_SST_TS_NTP, /* not used (25) */ CTL_SST_TS_UHF, /* REFCLK_GPS_HP (26) */ CTL_SST_TS_LF, /* REFCLK_ARCRON_MSF (27) */ CTL_SST_TS_UHF, /* REFCLK_SHM (28) */ CTL_SST_TS_UHF, /* REFCLK_PALISADE (29) */ CTL_SST_TS_UHF, /* REFCLK_ONCORE (30) */ CTL_SST_TS_UHF, /* REFCLK_JUPITER (31) */ CTL_SST_TS_LF, /* REFCLK_CHRONOLOG (32) */ CTL_SST_TS_LF, /* REFCLK_DUMBCLOCK (33) */ CTL_SST_TS_LF, /* REFCLK_ULINK (34) */ CTL_SST_TS_LF, /* REFCLK_PCF (35) */ CTL_SST_TS_HF, /* REFCLK_WWV (36) */ CTL_SST_TS_LF, /* REFCLK_FG (37) */ CTL_SST_TS_UHF, /* REFCLK_HOPF_SERIAL (38) */ CTL_SST_TS_UHF, /* REFCLK_HOPF_PCI (39) */ CTL_SST_TS_LF, /* REFCLK_JJY (40) */ CTL_SST_TS_UHF, /* REFCLK_TT560 (41) */ CTL_SST_TS_UHF, /* REFCLK_ZYFER (42) */ CTL_SST_TS_UHF, /* REFCLK_RIPENCC (43) */ CTL_SST_TS_UHF, /* REFCLK_NEOCLOCK4X (44) */ CTL_SST_TS_UHF, /* REFCLK_TSYNCPCI (45) */ CTL_SST_TS_UHF /* REFCLK_GPSDJSON (46) */ }; #endif /* REFCLOCK */ /* * Keyid used for authenticating write requests. */ keyid_t ctl_auth_keyid; /* * We keep track of the last error reported by the system internally */ static u_char ctl_sys_last_event; static u_char ctl_sys_num_events; /* * Statistic counters to keep track of requests and responses. */ u_long ctltimereset; /* time stats reset */ u_long numctlreq; /* number of requests we've received */ u_long numctlbadpkts; /* number of bad control packets */ u_long numctlresponses; /* number of resp packets sent with data */ u_long numctlfrags; /* number of fragments sent */ u_long numctlerrors; /* number of error responses sent */ u_long numctltooshort; /* number of too short input packets */ u_long numctlinputresp; /* number of responses on input */ u_long numctlinputfrag; /* number of fragments on input */ u_long numctlinputerr; /* number of input pkts with err bit set */ u_long numctlbadoffset; /* number of input pkts with nonzero offset */ u_long numctlbadversion; /* number of input pkts with unknown version */ u_long numctldatatooshort; /* data too short for count */ u_long numctlbadop; /* bad op code found in packet */ u_long numasyncmsgs; /* number of async messages we've sent */ /* * Response packet used by these routines. Also some state information * so that we can handle packet formatting within a common set of * subroutines. Note we try to enter data in place whenever possible, * but the need to set the more bit correctly means we occasionally * use the extra buffer and copy. */ static struct ntp_control rpkt; static u_char res_version; static u_char res_opcode; static associd_t res_associd; static u_short res_frags; /* datagrams in this response */ static int res_offset; /* offset of payload in response */ static u_char * datapt; static u_char * dataend; static int datalinelen; static int datasent; /* flag to avoid initial ", " */ static int datanotbinflag; static sockaddr_u *rmt_addr; static endpt *lcl_inter; static u_char res_authenticate; static u_char res_authokay; static keyid_t res_keyid; #define MAXDATALINELEN (72) static u_char res_async; /* sending async trap response? */ /* * Pointers for saving state when decoding request packets */ static char *reqpt; static char *reqend; /* * init_control - initialize request data */ void init_control(void) { size_t i; #ifdef HAVE_UNAME uname(&utsnamebuf); #endif /* HAVE_UNAME */ ctl_clr_stats(); ctl_auth_keyid = 0; ctl_sys_last_event = EVNT_UNSPEC; ctl_sys_num_events = 0; num_ctl_traps = 0; for (i = 0; i < COUNTOF(ctl_traps); i++) ctl_traps[i].tr_flags = 0; } /* * ctl_error - send an error response for the current request */ static void ctl_error( u_char errcode ) { size_t maclen; numctlerrors++; DPRINTF(3, ("sending control error %u\n", errcode)); /* * Fill in the fields. We assume rpkt.sequence and rpkt.associd * have already been filled in. */ rpkt.r_m_e_op = (u_char)CTL_RESPONSE | CTL_ERROR | (res_opcode & CTL_OP_MASK); rpkt.status = htons((u_short)(errcode << 8) & 0xff00); rpkt.count = 0; /* * send packet and bump counters */ if (res_authenticate && sys_authenticate) { maclen = authencrypt(res_keyid, (u_int32 *)&rpkt, CTL_HEADER_LEN); sendpkt(rmt_addr, lcl_inter, -2, (void *)&rpkt, CTL_HEADER_LEN + maclen); } else sendpkt(rmt_addr, lcl_inter, -3, (void *)&rpkt, CTL_HEADER_LEN); } int/*BOOL*/ is_safe_filename(const char * name) { /* We need a strict validation of filenames we should write: The * daemon might run with special permissions and is remote * controllable, so we better take care what we allow as file * name! * * The first character must be digit or a letter from the ASCII * base plane or a '_' ([_A-Za-z0-9]), the following characters * must be from [-._+A-Za-z0-9]. * * We do not trust the character classification much here: Since * the NTP protocol makes no provisions for UTF-8 or local code * pages, we strictly require the 7bit ASCII code page. * * The following table is a packed bit field of 128 two-bit * groups. The LSB in each group tells us if a character is * acceptable at the first position, the MSB if the character is * accepted at any other position. * * This does not ensure that the file name is syntactically * correct (multiple dots will not work with VMS...) but it will * exclude potential globbing bombs and directory traversal. It * also rules out drive selection. (For systems that have this * notion, like Windows or VMS.) */ static const uint32_t chclass[8] = { 0x00000000, 0x00000000, 0x28800000, 0x000FFFFF, 0xFFFFFFFC, 0xC03FFFFF, 0xFFFFFFFC, 0x003FFFFF }; u_int widx, bidx, mask; if ( ! (name && *name)) return FALSE; mask = 1u; while (0 != (widx = (u_char)*name++)) { bidx = (widx & 15) << 1; widx = widx >> 4; if (widx >= sizeof(chclass)/sizeof(chclass[0])) return FALSE; if (0 == ((chclass[widx] >> bidx) & mask)) return FALSE; mask = 2u; } return TRUE; } /* * save_config - Implements ntpq -c "saveconfig " * Writes current configuration including any runtime * changes by ntpq's :config or config-from-file * * Note: There should be no buffer overflow or truncation in the * processing of file names -- both cause security problems. This is bit * painful to code but essential here. */ void save_config( struct recvbuf *rbufp, int restrict_mask ) { /* block directory traversal by searching for characters that * indicate directory components in a file path. * * Conceptually we should be searching for DIRSEP in filename, * however Windows actually recognizes both forward and * backslashes as equivalent directory separators at the API * level. On POSIX systems we could allow '\\' but such * filenames are tricky to manipulate from a shell, so just * reject both types of slashes on all platforms. */ /* TALOS-CAN-0062: block directory traversal for VMS, too */ static const char * illegal_in_filename = #if defined(VMS) ":[]" /* do not allow drive and path components here */ #elif defined(SYS_WINNT) ":\\/" /* path and drive separators */ #else "\\/" /* separator and critical char for POSIX */ #endif ; char reply[128]; #ifdef SAVECONFIG static const char savedconfig_eq[] = "savedconfig="; /* Build a safe open mode from the available mode flags. We want * to create a new file and write it in text mode (when * applicable -- only Windows does this...) */ static const int openmode = O_CREAT | O_TRUNC | O_WRONLY # if defined(O_EXCL) /* posix, vms */ | O_EXCL # elif defined(_O_EXCL) /* windows is alway very special... */ | _O_EXCL # endif # if defined(_O_TEXT) /* windows, again */ | _O_TEXT #endif ; char filespec[128]; char filename[128]; char fullpath[512]; char savedconfig[sizeof(savedconfig_eq) + sizeof(filename)]; time_t now; int fd; FILE *fptr; int prc; size_t reqlen; #endif if (RES_NOMODIFY & restrict_mask) { ctl_printf("%s", "saveconfig prohibited by restrict ... nomodify"); ctl_flushpkt(0); NLOG(NLOG_SYSINFO) msyslog(LOG_NOTICE, "saveconfig from %s rejected due to nomodify restriction", stoa(&rbufp->recv_srcadr)); sys_restricted++; return; } #ifdef SAVECONFIG if (NULL == saveconfigdir) { ctl_printf("%s", "saveconfig prohibited, no saveconfigdir configured"); ctl_flushpkt(0); NLOG(NLOG_SYSINFO) msyslog(LOG_NOTICE, "saveconfig from %s rejected, no saveconfigdir", stoa(&rbufp->recv_srcadr)); return; } /* The length checking stuff gets serious. Do not assume a NUL * byte can be found, but if so, use it to calculate the needed * buffer size. If the available buffer is too short, bail out; * likewise if there is no file spec. (The latter will not * happen when using NTPQ, but there are other ways to craft a * network packet!) */ reqlen = (size_t)(reqend - reqpt); if (0 != reqlen) { char * nulpos = (char*)memchr(reqpt, 0, reqlen); if (NULL != nulpos) reqlen = (size_t)(nulpos - reqpt); } if (0 == reqlen) return; if (reqlen >= sizeof(filespec)) { ctl_printf("saveconfig exceeded maximum raw name length (%u)", (u_int)sizeof(filespec)); ctl_flushpkt(0); msyslog(LOG_NOTICE, "saveconfig exceeded maximum raw name length from %s", stoa(&rbufp->recv_srcadr)); return; } /* copy data directly as we exactly know the size */ memcpy(filespec, reqpt, reqlen); filespec[reqlen] = '\0'; /* * allow timestamping of the saved config filename with * strftime() format such as: * ntpq -c "saveconfig ntp-%Y%m%d-%H%M%S.conf" * XXX: Nice feature, but not too safe. * YYY: The check for permitted characters in file names should * weed out the worst. Let's hope 'strftime()' does not * develop pathological problems. */ time(&now); if (0 == strftime(filename, sizeof(filename), filespec, localtime(&now))) { /* * If we arrive here, 'strftime()' balked; most likely * the buffer was too short. (Or it encounterd an empty * format, or just a format that expands to an empty * string.) We try to use the original name, though this * is very likely to fail later if there are format * specs in the string. Note that truncation cannot * happen here as long as both buffers have the same * size! */ strlcpy(filename, filespec, sizeof(filename)); } /* * Check the file name for sanity. This might/will rule out file * names that would be legal but problematic, and it blocks * directory traversal. */ if (!is_safe_filename(filename)) { ctl_printf("saveconfig rejects unsafe file name '%s'", filename); ctl_flushpkt(0); msyslog(LOG_NOTICE, "saveconfig rejects unsafe file name from %s", stoa(&rbufp->recv_srcadr)); return; } /* * XXX: This next test may not be needed with is_safe_filename() */ /* block directory/drive traversal */ /* TALOS-CAN-0062: block directory traversal for VMS, too */ if (NULL != strpbrk(filename, illegal_in_filename)) { snprintf(reply, sizeof(reply), "saveconfig does not allow directory in filename"); ctl_putdata(reply, strlen(reply), 0); ctl_flushpkt(0); msyslog(LOG_NOTICE, "saveconfig rejects unsafe file name from %s", stoa(&rbufp->recv_srcadr)); return; } /* concatenation of directory and path can cause another * truncation... */ prc = snprintf(fullpath, sizeof(fullpath), "%s%s", saveconfigdir, filename); if (prc < 0 || (size_t)prc >= sizeof(fullpath)) { ctl_printf("saveconfig exceeded maximum path length (%u)", (u_int)sizeof(fullpath)); ctl_flushpkt(0); msyslog(LOG_NOTICE, "saveconfig exceeded maximum path length from %s", stoa(&rbufp->recv_srcadr)); return; } fd = open(fullpath, openmode, S_IRUSR | S_IWUSR); if (-1 == fd) fptr = NULL; else fptr = fdopen(fd, "w"); if (NULL == fptr || -1 == dump_all_config_trees(fptr, 1)) { ctl_printf("Unable to save configuration to file '%s': %s", filename, strerror(errno)); msyslog(LOG_ERR, "saveconfig %s from %s failed", filename, stoa(&rbufp->recv_srcadr)); } else { ctl_printf("Configuration saved to '%s'", filename); msyslog(LOG_NOTICE, "Configuration saved to '%s' (requested by %s)", fullpath, stoa(&rbufp->recv_srcadr)); /* * save the output filename in system variable * savedconfig, retrieved with: * ntpq -c "rv 0 savedconfig" * Note: the way 'savedconfig' is defined makes overflow * checks unnecessary here. */ snprintf(savedconfig, sizeof(savedconfig), "%s%s", savedconfig_eq, filename); set_sys_var(savedconfig, strlen(savedconfig) + 1, RO); } if (NULL != fptr) fclose(fptr); #else /* !SAVECONFIG follows */ ctl_printf("%s", "saveconfig unavailable, configured with --disable-saveconfig"); #endif ctl_flushpkt(0); } /* * process_control - process an incoming control message */ void process_control( struct recvbuf *rbufp, int restrict_mask ) { struct ntp_control *pkt; int req_count; int req_data; const struct ctl_proc *cc; keyid_t *pkid; int properlen; size_t maclen; DPRINTF(3, ("in process_control()\n")); /* * Save the addresses for error responses */ numctlreq++; rmt_addr = &rbufp->recv_srcadr; lcl_inter = rbufp->dstadr; pkt = (struct ntp_control *)&rbufp->recv_pkt; /* * If the length is less than required for the header, * ignore it. */ if (rbufp->recv_length < (int)CTL_HEADER_LEN) { DPRINTF(1, ("Short control packet\n")); numctltooshort++; return; } /* * If this packet is a response or a fragment, ignore it. */ if ( (CTL_RESPONSE | CTL_MORE | CTL_ERROR) & pkt->r_m_e_op || pkt->offset != 0) { DPRINTF(1, ("invalid format in control packet\n")); if (CTL_RESPONSE & pkt->r_m_e_op) numctlinputresp++; if (CTL_MORE & pkt->r_m_e_op) numctlinputfrag++; if (CTL_ERROR & pkt->r_m_e_op) numctlinputerr++; if (pkt->offset != 0) numctlbadoffset++; return; } res_version = PKT_VERSION(pkt->li_vn_mode); if (res_version > NTP_VERSION || res_version < NTP_OLDVERSION) { DPRINTF(1, ("unknown version %d in control packet\n", res_version)); numctlbadversion++; return; } /* * Pull enough data from the packet to make intelligent * responses */ rpkt.li_vn_mode = PKT_LI_VN_MODE(sys_leap, res_version, MODE_CONTROL); res_opcode = pkt->r_m_e_op; rpkt.sequence = pkt->sequence; rpkt.associd = pkt->associd; rpkt.status = 0; res_frags = 1; res_offset = 0; res_associd = htons(pkt->associd); res_async = FALSE; res_authenticate = FALSE; res_keyid = 0; res_authokay = FALSE; req_count = (int)ntohs(pkt->count); datanotbinflag = FALSE; datalinelen = 0; datasent = 0; datapt = rpkt.u.data; dataend = &rpkt.u.data[CTL_MAX_DATA_LEN]; if ((rbufp->recv_length & 0x3) != 0) DPRINTF(3, ("Control packet length %d unrounded\n", rbufp->recv_length)); /* * We're set up now. Make sure we've got at least enough * incoming data space to match the count. */ req_data = rbufp->recv_length - CTL_HEADER_LEN; if (req_data < req_count || rbufp->recv_length & 0x3) { ctl_error(CERR_BADFMT); numctldatatooshort++; return; } properlen = req_count + CTL_HEADER_LEN; /* round up proper len to a 8 octet boundary */ properlen = (properlen + 7) & ~7; maclen = rbufp->recv_length - properlen; if ((rbufp->recv_length & 3) == 0 && maclen >= MIN_MAC_LEN && maclen <= MAX_MAC_LEN && sys_authenticate) { res_authenticate = TRUE; pkid = (void *)((char *)pkt + properlen); res_keyid = ntohl(*pkid); DPRINTF(3, ("recv_len %d, properlen %d, wants auth with keyid %08x, MAC length=%zu\n", rbufp->recv_length, properlen, res_keyid, maclen)); if (!authistrustedip(res_keyid, &rbufp->recv_srcadr)) DPRINTF(3, ("invalid keyid %08x\n", res_keyid)); else if (authdecrypt(res_keyid, (u_int32 *)pkt, rbufp->recv_length - maclen, maclen)) { res_authokay = TRUE; DPRINTF(3, ("authenticated okay\n")); } else { res_keyid = 0; DPRINTF(3, ("authentication failed\n")); } } /* * Set up translate pointers */ reqpt = (char *)pkt->u.data; reqend = reqpt + req_count; /* * Look for the opcode processor */ for (cc = control_codes; cc->control_code != NO_REQUEST; cc++) { if (cc->control_code == res_opcode) { DPRINTF(3, ("opcode %d, found command handler\n", res_opcode)); if (cc->flags == AUTH && (!res_authokay || res_keyid != ctl_auth_keyid)) { ctl_error(CERR_PERMISSION); return; } (cc->handler)(rbufp, restrict_mask); return; } } /* * Can't find this one, return an error. */ numctlbadop++; ctl_error(CERR_BADOP); return; } /* * ctlpeerstatus - return a status word for this peer */ u_short ctlpeerstatus( register struct peer *p ) { u_short status; status = p->status; if (FLAG_CONFIG & p->flags) status |= CTL_PST_CONFIG; if (p->keyid) status |= CTL_PST_AUTHENABLE; if (FLAG_AUTHENTIC & p->flags) status |= CTL_PST_AUTHENTIC; if (p->reach) status |= CTL_PST_REACH; if (MDF_TXONLY_MASK & p->cast_flags) status |= CTL_PST_BCAST; return CTL_PEER_STATUS(status, p->num_events, p->last_event); } /* * ctlclkstatus - return a status word for this clock */ #ifdef REFCLOCK static u_short ctlclkstatus( struct refclockstat *pcs ) { return CTL_PEER_STATUS(0, pcs->lastevent, pcs->currentstatus); } #endif /* * ctlsysstatus - return the system status word */ u_short ctlsysstatus(void) { register u_char this_clock; this_clock = CTL_SST_TS_UNSPEC; #ifdef REFCLOCK if (sys_peer != NULL) { if (CTL_SST_TS_UNSPEC != sys_peer->sstclktype) this_clock = sys_peer->sstclktype; else if (sys_peer->refclktype < COUNTOF(clocktypes)) this_clock = clocktypes[sys_peer->refclktype]; } #else /* REFCLOCK */ if (sys_peer != 0) this_clock = CTL_SST_TS_NTP; #endif /* REFCLOCK */ return CTL_SYS_STATUS(sys_leap, this_clock, ctl_sys_num_events, ctl_sys_last_event); } /* * ctl_flushpkt - write out the current packet and prepare * another if necessary. */ static void ctl_flushpkt( u_char more ) { size_t i; size_t dlen; size_t sendlen; size_t maclen; size_t totlen; keyid_t keyid; dlen = datapt - rpkt.u.data; if (!more && datanotbinflag && dlen + 2 < CTL_MAX_DATA_LEN) { /* * Big hack, output a trailing \r\n */ *datapt++ = '\r'; *datapt++ = '\n'; dlen += 2; } sendlen = dlen + CTL_HEADER_LEN; /* * Pad to a multiple of 32 bits */ while (sendlen & 0x3) { *datapt++ = '\0'; sendlen++; } /* * Fill in the packet with the current info */ rpkt.r_m_e_op = CTL_RESPONSE | more | (res_opcode & CTL_OP_MASK); rpkt.count = htons((u_short)dlen); rpkt.offset = htons((u_short)res_offset); if (res_async) { for (i = 0; i < COUNTOF(ctl_traps); i++) { if (TRAP_INUSE & ctl_traps[i].tr_flags) { rpkt.li_vn_mode = PKT_LI_VN_MODE( sys_leap, ctl_traps[i].tr_version, MODE_CONTROL); rpkt.sequence = htons(ctl_traps[i].tr_sequence); sendpkt(&ctl_traps[i].tr_addr, ctl_traps[i].tr_localaddr, -4, (struct pkt *)&rpkt, sendlen); if (!more) ctl_traps[i].tr_sequence++; numasyncmsgs++; } } } else { if (res_authenticate && sys_authenticate) { totlen = sendlen; /* * If we are going to authenticate, then there * is an additional requirement that the MAC * begin on a 64 bit boundary. */ while (totlen & 7) { *datapt++ = '\0'; totlen++; } keyid = htonl(res_keyid); memcpy(datapt, &keyid, sizeof(keyid)); maclen = authencrypt(res_keyid, (u_int32 *)&rpkt, totlen); sendpkt(rmt_addr, lcl_inter, -5, (struct pkt *)&rpkt, totlen + maclen); } else { sendpkt(rmt_addr, lcl_inter, -6, (struct pkt *)&rpkt, sendlen); } if (more) numctlfrags++; else numctlresponses++; } /* * Set us up for another go around. */ res_frags++; res_offset += dlen; datapt = rpkt.u.data; } /* -------------------------------------------------------------------- * block transfer API -- stream string/data fragments into xmit buffer * without additional copying */ /* buffer descriptor: address & size of fragment * 'buf' may only be NULL when 'len' is zero! */ typedef struct { const void *buf; size_t len; } CtlMemBufT; /* put ctl data in a gather-style operation */ static void ctl_putdata_ex( const CtlMemBufT * argv, size_t argc, int/*BOOL*/ bin /* set to 1 when data is binary */ ) { const char * src_ptr; size_t src_len, cur_len, add_len, argi; /* text / binary preprocessing, possibly create new linefeed */ if (bin) { add_len = 0; } else { datanotbinflag = TRUE; add_len = 3; if (datasent) { *datapt++ = ','; datalinelen++; /* sum up total length */ for (argi = 0, src_len = 0; argi < argc; ++argi) src_len += argv[argi].len; /* possibly start a new line, assume no size_t overflow */ if ((src_len + datalinelen + 1) >= MAXDATALINELEN) { *datapt++ = '\r'; *datapt++ = '\n'; datalinelen = 0; } else { *datapt++ = ' '; datalinelen++; } } } /* now stream out all buffers */ for (argi = 0; argi < argc; ++argi) { src_ptr = argv[argi].buf; src_len = argv[argi].len; if ( ! (src_ptr && src_len)) continue; cur_len = (size_t)(dataend - datapt); while ((src_len + add_len) > cur_len) { /* Not enough room in this one, flush it out. */ if (src_len < cur_len) cur_len = src_len; memcpy(datapt, src_ptr, cur_len); datapt += cur_len; datalinelen += cur_len; src_ptr += cur_len; src_len -= cur_len; ctl_flushpkt(CTL_MORE); cur_len = (size_t)(dataend - datapt); } memcpy(datapt, src_ptr, src_len); datapt += src_len; datalinelen += src_len; datasent = TRUE; } } /* * ctl_putdata - write data into the packet, fragmenting and starting * another if this one is full. */ static void ctl_putdata( const char *dp, unsigned int dlen, int bin /* set to 1 when data is binary */ ) { CtlMemBufT args[1]; args[0].buf = dp; args[0].len = dlen; ctl_putdata_ex(args, 1, bin); } /* * ctl_putstr - write a tagged string into the response packet * in the form: * * tag="data" * * len is the data length excluding the NUL terminator, * as in ctl_putstr("var", "value", strlen("value")); */ static void ctl_putstr( const char * tag, const char * data, size_t len ) { CtlMemBufT args[4]; args[0].buf = tag; args[0].len = strlen(tag); if (data && len) { args[1].buf = "=\""; args[1].len = 2; args[2].buf = data; args[2].len = len; args[3].buf = "\""; args[3].len = 1; ctl_putdata_ex(args, 4, FALSE); } else { args[1].buf = "=\"\""; args[1].len = 3; ctl_putdata_ex(args, 2, FALSE); } } /* * ctl_putunqstr - write a tagged string into the response packet * in the form: * * tag=data * * len is the data length excluding the NUL terminator. * data must not contain a comma or whitespace. */ static void ctl_putunqstr( const char * tag, const char * data, size_t len ) { CtlMemBufT args[3]; args[0].buf = tag; args[0].len = strlen(tag); args[1].buf = "="; args[1].len = 1; if (data && len) { args[2].buf = data; args[2].len = len; ctl_putdata_ex(args, 3, FALSE); } else { ctl_putdata_ex(args, 2, FALSE); } } /* * ctl_putdblf - write a tagged, signed double into the response packet */ static void ctl_putdblf( const char * tag, int use_f, int precision, double d ) { char buffer[40]; int rc; rc = snprintf(buffer, sizeof(buffer), (use_f ? "%.*f" : "%.*g"), precision, d); INSIST(rc >= 0 && (size_t)rc < sizeof(buffer)); ctl_putunqstr(tag, buffer, rc); } /* * ctl_putuint - write a tagged unsigned integer into the response */ static void ctl_putuint( const char *tag, u_long uval ) { char buffer[24]; /* needs to fit for 64 bits! */ int rc; rc = snprintf(buffer, sizeof(buffer), "%lu", uval); INSIST(rc >= 0 && (size_t)rc < sizeof(buffer)); ctl_putunqstr(tag, buffer, rc); } /* * ctl_putcal - write a decoded calendar data into the response. * only used with AUTOKEY currently, so compiled conditional */ #ifdef AUTOKEY static void ctl_putcal( const char *tag, const struct calendar *pcal ) { char buffer[16]; int rc; rc = snprintf(buffer, sizeof(buffer), "%04d%02d%02d%02d%02d", pcal->year, pcal->month, pcal->monthday, pcal->hour, pcal->minute ); INSIST(rc >= 0 && (size_t)rc < sizeof(buffer)); ctl_putunqstr(tag, buffer, rc); } #endif /* * ctl_putfs - write a decoded filestamp into the response */ static void ctl_putfs( const char *tag, tstamp_t uval ) { char buffer[16]; int rc; time_t fstamp = (time_t)uval - JAN_1970; struct tm *tm = gmtime(&fstamp); if (NULL == tm) return; rc = snprintf(buffer, sizeof(buffer), "%04d%02d%02d%02d%02d", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min); INSIST(rc >= 0 && (size_t)rc < sizeof(buffer)); ctl_putunqstr(tag, buffer, rc); } /* * ctl_puthex - write a tagged unsigned integer, in hex, into the * response */ static void ctl_puthex( const char *tag, u_long uval ) { char buffer[24]; /* must fit 64bit int! */ int rc; rc = snprintf(buffer, sizeof(buffer), "0x%lx", uval); INSIST(rc >= 0 && (size_t)rc < sizeof(buffer)); ctl_putunqstr(tag, buffer, rc); } /* * ctl_putint - write a tagged signed integer into the response */ static void ctl_putint( const char *tag, long ival ) { char buffer[24]; /*must fit 64bit int */ int rc; rc = snprintf(buffer, sizeof(buffer), "%ld", ival); INSIST(rc >= 0 && (size_t)rc < sizeof(buffer)); ctl_putunqstr(tag, buffer, rc); } /* * ctl_putts - write a tagged timestamp, in hex, into the response */ static void ctl_putts( const char *tag, l_fp *ts ) { char buffer[24]; int rc; rc = snprintf(buffer, sizeof(buffer), "0x%08lx.%08lx", (u_long)ts->l_ui, (u_long)ts->l_uf); INSIST(rc >= 0 && (size_t)rc < sizeof(buffer)); ctl_putunqstr(tag, buffer, rc); } /* * ctl_putadr - write an IP address into the response */ static void ctl_putadr( const char *tag, u_int32 addr32, sockaddr_u *addr ) { const char *cq; if (NULL == addr) cq = numtoa(addr32); else cq = stoa(addr); ctl_putunqstr(tag, cq, strlen(cq)); } /* * ctl_putrefid - send a u_int32 refid as printable text */ static void ctl_putrefid( const char * tag, u_int32 refid ) { size_t nc; union { uint32_t w; uint8_t b[sizeof(uint32_t)]; } bytes; bytes.w = refid; for (nc = 0; nc < sizeof(bytes.b) && bytes.b[nc]; ++nc) if ( !isprint(bytes.b[nc]) || isspace(bytes.b[nc]) || bytes.b[nc] == ',' ) bytes.b[nc] = '.'; ctl_putunqstr(tag, (const char*)bytes.b, nc); } /* * ctl_putarray - write a tagged eight element double array into the response */ static void ctl_putarray( const char *tag, double *arr, int start ) { char *cp, *ep; char buffer[200]; int i, rc; cp = buffer; ep = buffer + sizeof(buffer); i = start; do { if (i == 0) i = NTP_SHIFT; i--; rc = snprintf(cp, (size_t)(ep - cp), " %.2f", arr[i] * 1e3); INSIST(rc >= 0 && (size_t)rc < (size_t)(ep - cp)); cp += rc; } while (i != start); ctl_putunqstr(tag, buffer, (size_t)(cp - buffer)); } /* * ctl_printf - put a formatted string into the data buffer */ static void ctl_printf( const char * fmt, ... ) { static const char * ellipsis = "[...]"; va_list va; char fmtbuf[128]; int rc; va_start(va, fmt); rc = vsnprintf(fmtbuf, sizeof(fmtbuf), fmt, va); va_end(va); if (rc < 0 || (size_t)rc >= sizeof(fmtbuf)) strcpy(fmtbuf + sizeof(fmtbuf) - strlen(ellipsis) - 1, ellipsis); ctl_putdata(fmtbuf, strlen(fmtbuf), 0); } /* * ctl_putsys - output a system variable */ static void ctl_putsys( int varid ) { l_fp tmp; char str[256]; u_int u; double kb; double dtemp; const char *ss; #ifdef AUTOKEY struct cert_info *cp; #endif /* AUTOKEY */ #ifdef KERNEL_PLL static struct timex ntx; static u_long ntp_adjtime_time; /* * CS_K_* variables depend on up-to-date output of ntp_adjtime() */ if (CS_KERN_FIRST <= varid && varid <= CS_KERN_LAST && current_time != ntp_adjtime_time) { ZERO(ntx); if (ntp_adjtime(&ntx) < 0) msyslog(LOG_ERR, "ntp_adjtime() for mode 6 query failed: %m"); else ntp_adjtime_time = current_time; } #endif /* KERNEL_PLL */ switch (varid) { case CS_LEAP: ctl_putuint(sys_var[CS_LEAP].text, sys_leap); break; case CS_STRATUM: ctl_putuint(sys_var[CS_STRATUM].text, sys_stratum); break; case CS_PRECISION: ctl_putint(sys_var[CS_PRECISION].text, sys_precision); break; case CS_ROOTDELAY: ctl_putdbl(sys_var[CS_ROOTDELAY].text, sys_rootdelay * 1e3); break; case CS_ROOTDISPERSION: ctl_putdbl(sys_var[CS_ROOTDISPERSION].text, sys_rootdisp * 1e3); break; case CS_REFID: if (REFID_ISTEXT(sys_stratum)) ctl_putrefid(sys_var[varid].text, sys_refid); else ctl_putadr(sys_var[varid].text, sys_refid, NULL); break; case CS_REFTIME: ctl_putts(sys_var[CS_REFTIME].text, &sys_reftime); break; case CS_POLL: ctl_putuint(sys_var[CS_POLL].text, sys_poll); break; case CS_PEERID: if (sys_peer == NULL) ctl_putuint(sys_var[CS_PEERID].text, 0); else ctl_putuint(sys_var[CS_PEERID].text, sys_peer->associd); break; case CS_PEERADR: if (sys_peer != NULL && sys_peer->dstadr != NULL) ss = sptoa(&sys_peer->srcadr); else ss = "0.0.0.0:0"; ctl_putunqstr(sys_var[CS_PEERADR].text, ss, strlen(ss)); break; case CS_PEERMODE: u = (sys_peer != NULL) ? sys_peer->hmode : MODE_UNSPEC; ctl_putuint(sys_var[CS_PEERMODE].text, u); break; case CS_OFFSET: ctl_putdbl6(sys_var[CS_OFFSET].text, last_offset * 1e3); break; case CS_DRIFT: ctl_putdbl(sys_var[CS_DRIFT].text, drift_comp * 1e6); break; case CS_JITTER: ctl_putdbl6(sys_var[CS_JITTER].text, sys_jitter * 1e3); break; case CS_ERROR: ctl_putdbl(sys_var[CS_ERROR].text, clock_jitter * 1e3); break; case CS_CLOCK: get_systime(&tmp); ctl_putts(sys_var[CS_CLOCK].text, &tmp); break; case CS_PROCESSOR: #ifndef HAVE_UNAME ctl_putstr(sys_var[CS_PROCESSOR].text, str_processor, sizeof(str_processor) - 1); #else ctl_putstr(sys_var[CS_PROCESSOR].text, utsnamebuf.machine, strlen(utsnamebuf.machine)); #endif /* HAVE_UNAME */ break; case CS_SYSTEM: #ifndef HAVE_UNAME ctl_putstr(sys_var[CS_SYSTEM].text, str_system, sizeof(str_system) - 1); #else snprintf(str, sizeof(str), "%s/%s", utsnamebuf.sysname, utsnamebuf.release); ctl_putstr(sys_var[CS_SYSTEM].text, str, strlen(str)); #endif /* HAVE_UNAME */ break; case CS_VERSION: ctl_putstr(sys_var[CS_VERSION].text, Version, strlen(Version)); break; case CS_STABIL: ctl_putdbl(sys_var[CS_STABIL].text, clock_stability * 1e6); break; case CS_VARLIST: { char buf[CTL_MAX_DATA_LEN]; //buffPointer, firstElementPointer, buffEndPointer char *buffp, *buffend; int firstVarName; const char *ss1; int len; const struct ctl_var *k; buffp = buf; buffend = buf + sizeof(buf); if (strlen(sys_var[CS_VARLIST].text) > (sizeof(buf) - 4)) break; /* really long var name */ snprintf(buffp, sizeof(buf), "%s=\"",sys_var[CS_VARLIST].text); buffp += strlen(buffp); firstVarName = TRUE; for (k = sys_var; !(k->flags & EOV); k++) { if (k->flags & PADDING) continue; len = strlen(k->text); if (len + 1 >= buffend - buffp) break; if (!firstVarName) *buffp++ = ','; else firstVarName = FALSE; memcpy(buffp, k->text, len); buffp += len; } for (k = ext_sys_var; k && !(k->flags & EOV); k++) { if (k->flags & PADDING) continue; if (NULL == k->text) continue; ss1 = strchr(k->text, '='); if (NULL == ss1) len = strlen(k->text); else len = ss1 - k->text; if (len + 1 >= buffend - buffp) break; if (firstVarName) { *buffp++ = ','; firstVarName = FALSE; } memcpy(buffp, k->text,(unsigned)len); buffp += len; } if (2 >= buffend - buffp) break; *buffp++ = '"'; *buffp = '\0'; ctl_putdata(buf, (unsigned)( buffp - buf ), 0); break; } case CS_TAI: if (sys_tai > 0) ctl_putuint(sys_var[CS_TAI].text, sys_tai); break; case CS_LEAPTAB: { leap_signature_t lsig; leapsec_getsig(&lsig); if (lsig.ttime > 0) ctl_putfs(sys_var[CS_LEAPTAB].text, lsig.ttime); break; } case CS_LEAPEND: { leap_signature_t lsig; leapsec_getsig(&lsig); if (lsig.etime > 0) ctl_putfs(sys_var[CS_LEAPEND].text, lsig.etime); break; } #ifdef LEAP_SMEAR case CS_LEAPSMEARINTV: if (leap_smear_intv > 0) ctl_putuint(sys_var[CS_LEAPSMEARINTV].text, leap_smear_intv); break; case CS_LEAPSMEAROFFS: if (leap_smear_intv > 0) ctl_putdbl(sys_var[CS_LEAPSMEAROFFS].text, leap_smear.doffset * 1e3); break; #endif /* LEAP_SMEAR */ case CS_RATE: ctl_putuint(sys_var[CS_RATE].text, ntp_minpoll); break; case CS_MRU_ENABLED: ctl_puthex(sys_var[varid].text, mon_enabled); break; case CS_MRU_DEPTH: ctl_putuint(sys_var[varid].text, mru_entries); break; case CS_MRU_MEM: kb = mru_entries * (sizeof(mon_entry) / 1024.); u = (u_int)kb; if (kb - u >= 0.5) u++; ctl_putuint(sys_var[varid].text, u); break; case CS_MRU_DEEPEST: ctl_putuint(sys_var[varid].text, mru_peakentries); break; case CS_MRU_MINDEPTH: ctl_putuint(sys_var[varid].text, mru_mindepth); break; case CS_MRU_MAXAGE: ctl_putint(sys_var[varid].text, mru_maxage); break; case CS_MRU_MAXDEPTH: ctl_putuint(sys_var[varid].text, mru_maxdepth); break; case CS_MRU_MAXMEM: kb = mru_maxdepth * (sizeof(mon_entry) / 1024.); u = (u_int)kb; if (kb - u >= 0.5) u++; ctl_putuint(sys_var[varid].text, u); break; case CS_SS_UPTIME: ctl_putuint(sys_var[varid].text, current_time); break; case CS_SS_RESET: ctl_putuint(sys_var[varid].text, current_time - sys_stattime); break; case CS_SS_RECEIVED: ctl_putuint(sys_var[varid].text, sys_received); break; case CS_SS_THISVER: ctl_putuint(sys_var[varid].text, sys_newversion); break; case CS_SS_OLDVER: ctl_putuint(sys_var[varid].text, sys_oldversion); break; case CS_SS_BADFORMAT: ctl_putuint(sys_var[varid].text, sys_badlength); break; case CS_SS_BADAUTH: ctl_putuint(sys_var[varid].text, sys_badauth); break; case CS_SS_DECLINED: ctl_putuint(sys_var[varid].text, sys_declined); break; case CS_SS_RESTRICTED: ctl_putuint(sys_var[varid].text, sys_restricted); break; case CS_SS_LIMITED: ctl_putuint(sys_var[varid].text, sys_limitrejected); break; case CS_SS_LAMPORT: ctl_putuint(sys_var[varid].text, sys_lamport); break; case CS_SS_TSROUNDING: ctl_putuint(sys_var[varid].text, sys_tsrounding); break; case CS_SS_KODSENT: ctl_putuint(sys_var[varid].text, sys_kodsent); break; case CS_SS_PROCESSED: ctl_putuint(sys_var[varid].text, sys_processed); break; case CS_BCASTDELAY: ctl_putdbl(sys_var[varid].text, sys_bdelay * 1e3); break; case CS_AUTHDELAY: LFPTOD(&sys_authdelay, dtemp); ctl_putdbl(sys_var[varid].text, dtemp * 1e3); break; case CS_AUTHKEYS: ctl_putuint(sys_var[varid].text, authnumkeys); break; case CS_AUTHFREEK: ctl_putuint(sys_var[varid].text, authnumfreekeys); break; case CS_AUTHKLOOKUPS: ctl_putuint(sys_var[varid].text, authkeylookups); break; case CS_AUTHKNOTFOUND: ctl_putuint(sys_var[varid].text, authkeynotfound); break; case CS_AUTHKUNCACHED: ctl_putuint(sys_var[varid].text, authkeyuncached); break; case CS_AUTHKEXPIRED: ctl_putuint(sys_var[varid].text, authkeyexpired); break; case CS_AUTHENCRYPTS: ctl_putuint(sys_var[varid].text, authencryptions); break; case CS_AUTHDECRYPTS: ctl_putuint(sys_var[varid].text, authdecryptions); break; case CS_AUTHRESET: ctl_putuint(sys_var[varid].text, current_time - auth_timereset); break; /* * CTL_IF_KERNLOOP() puts a zero if the kernel loop is * unavailable, otherwise calls putfunc with args. */ #ifndef KERNEL_PLL # define CTL_IF_KERNLOOP(putfunc, args) \ ctl_putint(sys_var[varid].text, 0) #else # define CTL_IF_KERNLOOP(putfunc, args) \ putfunc args #endif /* * CTL_IF_KERNPPS() puts a zero if either the kernel * loop is unavailable, or kernel hard PPS is not * active, otherwise calls putfunc with args. */ #ifndef KERNEL_PLL # define CTL_IF_KERNPPS(putfunc, args) \ ctl_putint(sys_var[varid].text, 0) #else # define CTL_IF_KERNPPS(putfunc, args) \ if (0 == ntx.shift) \ ctl_putint(sys_var[varid].text, 0); \ else \ putfunc args /* no trailing ; */ #endif case CS_K_OFFSET: CTL_IF_KERNLOOP( ctl_putdblf, (sys_var[varid].text, 0, -1, 1000 * dbl_from_var_long(ntx.offset, ntx.status)) ); break; case CS_K_FREQ: CTL_IF_KERNLOOP( ctl_putsfp, (sys_var[varid].text, ntx.freq) ); break; case CS_K_MAXERR: CTL_IF_KERNLOOP( ctl_putdblf, (sys_var[varid].text, 0, 6, 1000 * dbl_from_usec_long(ntx.maxerror)) ); break; case CS_K_ESTERR: CTL_IF_KERNLOOP( ctl_putdblf, (sys_var[varid].text, 0, 6, 1000 * dbl_from_usec_long(ntx.esterror)) ); break; case CS_K_STFLAGS: #ifndef KERNEL_PLL ss = ""; #else ss = k_st_flags(ntx.status); #endif ctl_putstr(sys_var[varid].text, ss, strlen(ss)); break; case CS_K_TIMECONST: CTL_IF_KERNLOOP( ctl_putint, (sys_var[varid].text, ntx.constant) ); break; case CS_K_PRECISION: CTL_IF_KERNLOOP( ctl_putdblf, (sys_var[varid].text, 0, 6, 1000 * dbl_from_var_long(ntx.precision, ntx.status)) ); break; case CS_K_FREQTOL: CTL_IF_KERNLOOP( ctl_putsfp, (sys_var[varid].text, ntx.tolerance) ); break; case CS_K_PPS_FREQ: CTL_IF_KERNPPS( ctl_putsfp, (sys_var[varid].text, ntx.ppsfreq) ); break; case CS_K_PPS_STABIL: CTL_IF_KERNPPS( ctl_putsfp, (sys_var[varid].text, ntx.stabil) ); break; case CS_K_PPS_JITTER: CTL_IF_KERNPPS( ctl_putdbl, (sys_var[varid].text, 1000 * dbl_from_var_long(ntx.jitter, ntx.status)) ); break; case CS_K_PPS_CALIBDUR: CTL_IF_KERNPPS( ctl_putint, (sys_var[varid].text, 1 << ntx.shift) ); break; case CS_K_PPS_CALIBS: CTL_IF_KERNPPS( ctl_putint, (sys_var[varid].text, ntx.calcnt) ); break; case CS_K_PPS_CALIBERRS: CTL_IF_KERNPPS( ctl_putint, (sys_var[varid].text, ntx.errcnt) ); break; case CS_K_PPS_JITEXC: CTL_IF_KERNPPS( ctl_putint, (sys_var[varid].text, ntx.jitcnt) ); break; case CS_K_PPS_STBEXC: CTL_IF_KERNPPS( ctl_putint, (sys_var[varid].text, ntx.stbcnt) ); break; case CS_IOSTATS_RESET: ctl_putuint(sys_var[varid].text, current_time - io_timereset); break; case CS_TOTAL_RBUF: ctl_putuint(sys_var[varid].text, total_recvbuffs()); break; case CS_FREE_RBUF: ctl_putuint(sys_var[varid].text, free_recvbuffs()); break; case CS_USED_RBUF: ctl_putuint(sys_var[varid].text, full_recvbuffs()); break; case CS_RBUF_LOWATER: ctl_putuint(sys_var[varid].text, lowater_additions()); break; case CS_IO_DROPPED: ctl_putuint(sys_var[varid].text, packets_dropped); break; case CS_IO_IGNORED: ctl_putuint(sys_var[varid].text, packets_ignored); break; case CS_IO_RECEIVED: ctl_putuint(sys_var[varid].text, packets_received); break; case CS_IO_SENT: ctl_putuint(sys_var[varid].text, packets_sent); break; case CS_IO_SENDFAILED: ctl_putuint(sys_var[varid].text, packets_notsent); break; case CS_IO_WAKEUPS: ctl_putuint(sys_var[varid].text, handler_calls); break; case CS_IO_GOODWAKEUPS: ctl_putuint(sys_var[varid].text, handler_pkts); break; case CS_TIMERSTATS_RESET: ctl_putuint(sys_var[varid].text, current_time - timer_timereset); break; case CS_TIMER_OVERRUNS: ctl_putuint(sys_var[varid].text, alarm_overflow); break; case CS_TIMER_XMTS: ctl_putuint(sys_var[varid].text, timer_xmtcalls); break; case CS_FUZZ: ctl_putdbl(sys_var[varid].text, sys_fuzz * 1e3); break; case CS_WANDER_THRESH: ctl_putdbl(sys_var[varid].text, wander_threshold * 1e6); break; #ifdef AUTOKEY case CS_FLAGS: if (crypto_flags) ctl_puthex(sys_var[CS_FLAGS].text, crypto_flags); break; case CS_DIGEST: if (crypto_flags) { strlcpy(str, OBJ_nid2ln(crypto_nid), COUNTOF(str)); ctl_putstr(sys_var[CS_DIGEST].text, str, strlen(str)); } break; case CS_SIGNATURE: if (crypto_flags) { const EVP_MD *dp; dp = EVP_get_digestbynid(crypto_flags >> 16); strlcpy(str, OBJ_nid2ln(EVP_MD_pkey_type(dp)), COUNTOF(str)); ctl_putstr(sys_var[CS_SIGNATURE].text, str, strlen(str)); } break; case CS_HOST: if (hostval.ptr != NULL) ctl_putstr(sys_var[CS_HOST].text, hostval.ptr, strlen(hostval.ptr)); break; case CS_IDENT: if (sys_ident != NULL) ctl_putstr(sys_var[CS_IDENT].text, sys_ident, strlen(sys_ident)); break; case CS_CERTIF: for (cp = cinfo; cp != NULL; cp = cp->link) { snprintf(str, sizeof(str), "%s %s 0x%x", cp->subject, cp->issuer, cp->flags); ctl_putstr(sys_var[CS_CERTIF].text, str, strlen(str)); ctl_putcal(sys_var[CS_REVTIME].text, &(cp->last)); } break; case CS_PUBLIC: if (hostval.tstamp != 0) ctl_putfs(sys_var[CS_PUBLIC].text, ntohl(hostval.tstamp)); break; #endif /* AUTOKEY */ default: break; } } /* * ctl_putpeer - output a peer variable */ static void ctl_putpeer( int id, struct peer *p ) { char buf[CTL_MAX_DATA_LEN]; char *s; char *t; char *be; int i; const struct ctl_var *k; #ifdef AUTOKEY struct autokey *ap; const EVP_MD *dp; const char *str; #endif /* AUTOKEY */ switch (id) { case CP_CONFIG: ctl_putuint(peer_var[id].text, !(FLAG_PREEMPT & p->flags)); break; case CP_AUTHENABLE: ctl_putuint(peer_var[id].text, !(p->keyid)); break; case CP_AUTHENTIC: ctl_putuint(peer_var[id].text, !!(FLAG_AUTHENTIC & p->flags)); break; case CP_SRCADR: ctl_putadr(peer_var[id].text, 0, &p->srcadr); break; case CP_SRCPORT: ctl_putuint(peer_var[id].text, SRCPORT(&p->srcadr)); break; case CP_SRCHOST: if (p->hostname != NULL) ctl_putstr(peer_var[id].text, p->hostname, strlen(p->hostname)); break; case CP_DSTADR: ctl_putadr(peer_var[id].text, 0, (p->dstadr != NULL) ? &p->dstadr->sin : NULL); break; case CP_DSTPORT: ctl_putuint(peer_var[id].text, (p->dstadr != NULL) ? SRCPORT(&p->dstadr->sin) : 0); break; case CP_IN: if (p->r21 > 0.) ctl_putdbl(peer_var[id].text, p->r21 / 1e3); break; case CP_OUT: if (p->r34 > 0.) ctl_putdbl(peer_var[id].text, p->r34 / 1e3); break; case CP_RATE: ctl_putuint(peer_var[id].text, p->throttle); break; case CP_LEAP: ctl_putuint(peer_var[id].text, p->leap); break; case CP_HMODE: ctl_putuint(peer_var[id].text, p->hmode); break; case CP_STRATUM: ctl_putuint(peer_var[id].text, p->stratum); break; case CP_PPOLL: ctl_putuint(peer_var[id].text, p->ppoll); break; case CP_HPOLL: ctl_putuint(peer_var[id].text, p->hpoll); break; case CP_PRECISION: ctl_putint(peer_var[id].text, p->precision); break; case CP_ROOTDELAY: ctl_putdbl(peer_var[id].text, p->rootdelay * 1e3); break; case CP_ROOTDISPERSION: ctl_putdbl(peer_var[id].text, p->rootdisp * 1e3); break; case CP_REFID: #ifdef REFCLOCK if (p->flags & FLAG_REFCLOCK) { ctl_putrefid(peer_var[id].text, p->refid); break; } #endif if (REFID_ISTEXT(p->stratum)) ctl_putrefid(peer_var[id].text, p->refid); else ctl_putadr(peer_var[id].text, p->refid, NULL); break; case CP_REFTIME: ctl_putts(peer_var[id].text, &p->reftime); break; case CP_ORG: ctl_putts(peer_var[id].text, &p->aorg); break; case CP_REC: ctl_putts(peer_var[id].text, &p->dst); break; case CP_XMT: if (p->xleave) ctl_putdbl(peer_var[id].text, p->xleave * 1e3); break; case CP_BIAS: if (p->bias != 0.) ctl_putdbl(peer_var[id].text, p->bias * 1e3); break; case CP_REACH: ctl_puthex(peer_var[id].text, p->reach); break; case CP_FLASH: ctl_puthex(peer_var[id].text, p->flash); break; case CP_TTL: #ifdef REFCLOCK if (p->flags & FLAG_REFCLOCK) { ctl_putuint(peer_var[id].text, p->ttl); break; } #endif if (p->ttl > 0 && p->ttl < COUNTOF(sys_ttl)) ctl_putint(peer_var[id].text, sys_ttl[p->ttl]); break; case CP_UNREACH: ctl_putuint(peer_var[id].text, p->unreach); break; case CP_TIMER: ctl_putuint(peer_var[id].text, p->nextdate - current_time); break; case CP_DELAY: ctl_putdbl(peer_var[id].text, p->delay * 1e3); break; case CP_OFFSET: ctl_putdbl(peer_var[id].text, p->offset * 1e3); break; case CP_JITTER: ctl_putdbl(peer_var[id].text, p->jitter * 1e3); break; case CP_DISPERSION: ctl_putdbl(peer_var[id].text, p->disp * 1e3); break; case CP_KEYID: if (p->keyid > NTP_MAXKEY) ctl_puthex(peer_var[id].text, p->keyid); else ctl_putuint(peer_var[id].text, p->keyid); break; case CP_FILTDELAY: ctl_putarray(peer_var[id].text, p->filter_delay, p->filter_nextpt); break; case CP_FILTOFFSET: ctl_putarray(peer_var[id].text, p->filter_offset, p->filter_nextpt); break; case CP_FILTERROR: ctl_putarray(peer_var[id].text, p->filter_disp, p->filter_nextpt); break; case CP_PMODE: ctl_putuint(peer_var[id].text, p->pmode); break; case CP_RECEIVED: ctl_putuint(peer_var[id].text, p->received); break; case CP_SENT: ctl_putuint(peer_var[id].text, p->sent); break; case CP_VARLIST: s = buf; be = buf + sizeof(buf); if (strlen(peer_var[id].text) + 4 > sizeof(buf)) break; /* really long var name */ snprintf(s, sizeof(buf), "%s=\"", peer_var[id].text); s += strlen(s); t = s; for (k = peer_var; !(EOV & k->flags); k++) { if (PADDING & k->flags) continue; i = strlen(k->text); if (s + i + 1 >= be) break; if (s != t) *s++ = ','; memcpy(s, k->text, i); s += i; } if (s + 2 < be) { *s++ = '"'; *s = '\0'; ctl_putdata(buf, (u_int)(s - buf), 0); } break; case CP_TIMEREC: ctl_putuint(peer_var[id].text, current_time - p->timereceived); break; case CP_TIMEREACH: ctl_putuint(peer_var[id].text, current_time - p->timereachable); break; case CP_BADAUTH: ctl_putuint(peer_var[id].text, p->badauth); break; case CP_BOGUSORG: ctl_putuint(peer_var[id].text, p->bogusorg); break; case CP_OLDPKT: ctl_putuint(peer_var[id].text, p->oldpkt); break; case CP_SELDISP: ctl_putuint(peer_var[id].text, p->seldisptoolarge); break; case CP_SELBROKEN: ctl_putuint(peer_var[id].text, p->selbroken); break; case CP_CANDIDATE: ctl_putuint(peer_var[id].text, p->status); break; #ifdef AUTOKEY case CP_FLAGS: if (p->crypto) ctl_puthex(peer_var[id].text, p->crypto); break; case CP_SIGNATURE: if (p->crypto) { dp = EVP_get_digestbynid(p->crypto >> 16); str = OBJ_nid2ln(EVP_MD_pkey_type(dp)); ctl_putstr(peer_var[id].text, str, strlen(str)); } break; case CP_HOST: if (p->subject != NULL) ctl_putstr(peer_var[id].text, p->subject, strlen(p->subject)); break; case CP_VALID: /* not used */ break; case CP_INITSEQ: if (NULL == (ap = p->recval.ptr)) break; ctl_putint(peer_var[CP_INITSEQ].text, ap->seq); ctl_puthex(peer_var[CP_INITKEY].text, ap->key); ctl_putfs(peer_var[CP_INITTSP].text, ntohl(p->recval.tstamp)); break; case CP_IDENT: if (p->ident != NULL) ctl_putstr(peer_var[id].text, p->ident, strlen(p->ident)); break; #endif /* AUTOKEY */ } } #ifdef REFCLOCK /* * ctl_putclock - output clock variables */ static void ctl_putclock( int id, struct refclockstat *pcs, int mustput ) { char buf[CTL_MAX_DATA_LEN]; char *s, *t, *be; const char *ss; int i; const struct ctl_var *k; switch (id) { case CC_TYPE: if (mustput || pcs->clockdesc == NULL || *(pcs->clockdesc) == '\0') { ctl_putuint(clock_var[id].text, pcs->type); } break; case CC_TIMECODE: ctl_putstr(clock_var[id].text, pcs->p_lastcode, (unsigned)pcs->lencode); break; case CC_POLL: ctl_putuint(clock_var[id].text, pcs->polls); break; case CC_NOREPLY: ctl_putuint(clock_var[id].text, pcs->noresponse); break; case CC_BADFORMAT: ctl_putuint(clock_var[id].text, pcs->badformat); break; case CC_BADDATA: ctl_putuint(clock_var[id].text, pcs->baddata); break; case CC_FUDGETIME1: if (mustput || (pcs->haveflags & CLK_HAVETIME1)) ctl_putdbl(clock_var[id].text, pcs->fudgetime1 * 1e3); break; case CC_FUDGETIME2: if (mustput || (pcs->haveflags & CLK_HAVETIME2)) ctl_putdbl(clock_var[id].text, pcs->fudgetime2 * 1e3); break; case CC_FUDGEVAL1: if (mustput || (pcs->haveflags & CLK_HAVEVAL1)) ctl_putint(clock_var[id].text, pcs->fudgeval1); break; case CC_FUDGEVAL2: /* RefID of clocks are always text even if stratum is fudged */ if (mustput || (pcs->haveflags & CLK_HAVEVAL2)) ctl_putrefid(clock_var[id].text, pcs->fudgeval2); break; case CC_FLAGS: ctl_putuint(clock_var[id].text, pcs->flags); break; case CC_DEVICE: if (pcs->clockdesc == NULL || *(pcs->clockdesc) == '\0') { if (mustput) ctl_putstr(clock_var[id].text, "", 0); } else { ctl_putstr(clock_var[id].text, pcs->clockdesc, strlen(pcs->clockdesc)); } break; case CC_VARLIST: s = buf; be = buf + sizeof(buf); if (strlen(clock_var[CC_VARLIST].text) + 4 > sizeof(buf)) break; /* really long var name */ snprintf(s, sizeof(buf), "%s=\"", clock_var[CC_VARLIST].text); s += strlen(s); t = s; for (k = clock_var; !(EOV & k->flags); k++) { if (PADDING & k->flags) continue; i = strlen(k->text); if (s + i + 1 >= be) break; if (s != t) *s++ = ','; memcpy(s, k->text, i); s += i; } for (k = pcs->kv_list; k && !(EOV & k->flags); k++) { if (PADDING & k->flags) continue; ss = k->text; if (NULL == ss) continue; while (*ss && *ss != '=') ss++; i = ss - k->text; if (s + i + 1 >= be) break; if (s != t) *s++ = ','; memcpy(s, k->text, (unsigned)i); s += i; *s = '\0'; } if (s + 2 >= be) break; *s++ = '"'; *s = '\0'; ctl_putdata(buf, (unsigned)(s - buf), 0); break; case CC_FUDGEMINJIT: if (mustput || (pcs->haveflags & CLK_HAVEMINJIT)) ctl_putdbl(clock_var[id].text, pcs->fudgeminjitter * 1e3); break; default: break; } } #endif /* * ctl_getitem - get the next data item from the incoming packet */ static const struct ctl_var * ctl_getitem( const struct ctl_var *var_list, char **data ) { /* [Bug 3008] First check the packet data sanity, then search * the key. This improves the consistency of result values: If * the result is NULL once, it will never be EOV again for this * packet; If it's EOV, it will never be NULL again until the * variable is found and processed in a given 'var_list'. (That * is, a result is returned that is neither NULL nor EOV). */ static const struct ctl_var eol = { 0, EOV, NULL }; static char buf[128]; static u_long quiet_until; const struct ctl_var *v; char *cp; char *tp; /* * Part One: Validate the packet state */ /* Delete leading commas and white space */ while (reqpt < reqend && (*reqpt == ',' || isspace((unsigned char)*reqpt))) reqpt++; if (reqpt >= reqend) return NULL; /* Scan the string in the packet until we hit comma or * EoB. Register position of first '=' on the fly. */ for (tp = NULL, cp = reqpt; cp != reqend; ++cp) { if (*cp == '=' && tp == NULL) tp = cp; if (*cp == ',') break; } /* Process payload, if any. */ *data = NULL; if (NULL != tp) { /* eventually strip white space from argument. */ const char *plhead = tp + 1; /* skip the '=' */ const char *pltail = cp; size_t plsize; while (plhead != pltail && isspace((u_char)plhead[0])) ++plhead; while (plhead != pltail && isspace((u_char)pltail[-1])) --pltail; /* check payload size, terminate packet on overflow */ plsize = (size_t)(pltail - plhead); if (plsize >= sizeof(buf)) goto badpacket; /* copy data, NUL terminate, and set result data ptr */ memcpy(buf, plhead, plsize); buf[plsize] = '\0'; *data = buf; } else { /* no payload, current end --> current name termination */ tp = cp; } /* Part Two * * Now we're sure that the packet data itself is sane. Scan the * list now. Make sure a NULL list is properly treated by * returning a synthetic End-Of-Values record. We must not * return NULL pointers after this point, or the behaviour would * become inconsistent if called several times with different * variable lists after an EoV was returned. (Such a behavior * actually caused Bug 3008.) */ if (NULL == var_list) return &eol; for (v = var_list; !(EOV & v->flags); ++v) if (!(PADDING & v->flags)) { /* Check if the var name matches the buffer. The * name is bracketed by [reqpt..tp] and not NUL * terminated, and it contains no '=' char. The * lookup value IS NUL-terminated but might * include a '='... We have to look out for * that! */ const char *sp1 = reqpt; const char *sp2 = v->text; /* [Bug 3412] do not compare past NUL byte in name */ while ( (sp1 != tp) && ('\0' != *sp2) && (*sp1 == *sp2)) { ++sp1; ++sp2; } if (sp1 == tp && (*sp2 == '\0' || *sp2 == '=')) break; } /* See if we have found a valid entry or not. If found, advance * the request pointer for the next round; if not, clear the * data pointer so we have no dangling garbage here. */ if (EOV & v->flags) *data = NULL; else reqpt = cp + (cp != reqend); return v; badpacket: /*TODO? somehow indicate this packet was bad, apart from syslog? */ numctlbadpkts++; NLOG(NLOG_SYSEVENT) if (quiet_until <= current_time) { quiet_until = current_time + 300; msyslog(LOG_WARNING, "Possible 'ntpdx' exploit from %s (possibly spoofed)", sptoa(rmt_addr)); } reqpt = reqend; /* never again for this packet! */ return NULL; } /* * control_unspec - response to an unspecified op-code */ /*ARGSUSED*/ static void control_unspec( struct recvbuf *rbufp, int restrict_mask ) { struct peer *peer; /* * What is an appropriate response to an unspecified op-code? * I return no errors and no data, unless a specified assocation * doesn't exist. */ if (res_associd) { peer = findpeerbyassoc(res_associd); if (NULL == peer) { ctl_error(CERR_BADASSOC); return; } rpkt.status = htons(ctlpeerstatus(peer)); } else rpkt.status = htons(ctlsysstatus()); ctl_flushpkt(0); } /* * read_status - return either a list of associd's, or a particular * peer's status. */ /*ARGSUSED*/ static void read_status( struct recvbuf *rbufp, int restrict_mask ) { struct peer *peer; const u_char *cp; size_t n; /* a_st holds association ID, status pairs alternating */ u_short a_st[CTL_MAX_DATA_LEN / sizeof(u_short)]; #ifdef DEBUG if (debug > 2) printf("read_status: ID %d\n", res_associd); #endif /* * Two choices here. If the specified association ID is * zero we return all known assocation ID's. Otherwise * we return a bunch of stuff about the particular peer. */ if (res_associd) { peer = findpeerbyassoc(res_associd); if (NULL == peer) { ctl_error(CERR_BADASSOC); return; } rpkt.status = htons(ctlpeerstatus(peer)); if (res_authokay) peer->num_events = 0; /* * For now, output everything we know about the * peer. May be more selective later. */ for (cp = def_peer_var; *cp != 0; cp++) ctl_putpeer((int)*cp, peer); ctl_flushpkt(0); return; } n = 0; rpkt.status = htons(ctlsysstatus()); for (peer = peer_list; peer != NULL; peer = peer->p_link) { a_st[n++] = htons(peer->associd); a_st[n++] = htons(ctlpeerstatus(peer)); /* two entries each loop iteration, so n + 1 */ if (n + 1 >= COUNTOF(a_st)) { ctl_putdata((void *)a_st, n * sizeof(a_st[0]), 1); n = 0; } } if (n) ctl_putdata((void *)a_st, n * sizeof(a_st[0]), 1); ctl_flushpkt(0); } /* * read_peervars - half of read_variables() implementation */ static void read_peervars(void) { const struct ctl_var *v; struct peer *peer; const u_char *cp; size_t i; char * valuep; u_char wants[CP_MAXCODE + 1]; u_int gotvar; /* * Wants info for a particular peer. See if we know * the guy. */ peer = findpeerbyassoc(res_associd); if (NULL == peer) { ctl_error(CERR_BADASSOC); return; } rpkt.status = htons(ctlpeerstatus(peer)); if (res_authokay) peer->num_events = 0; ZERO(wants); gotvar = 0; while (NULL != (v = ctl_getitem(peer_var, &valuep))) { if (v->flags & EOV) { ctl_error(CERR_UNKNOWNVAR); return; } INSIST(v->code < COUNTOF(wants)); wants[v->code] = 1; gotvar = 1; } if (gotvar) { for (i = 1; i < COUNTOF(wants); i++) if (wants[i]) ctl_putpeer(i, peer); } else for (cp = def_peer_var; *cp != 0; cp++) ctl_putpeer((int)*cp, peer); ctl_flushpkt(0); } /* * read_sysvars - half of read_variables() implementation */ static void read_sysvars(void) { const struct ctl_var *v; struct ctl_var *kv; u_int n; u_int gotvar; const u_char *cs; char * valuep; const char * pch; u_char *wants; size_t wants_count; /* * Wants system variables. Figure out which he wants * and give them to him. */ rpkt.status = htons(ctlsysstatus()); if (res_authokay) ctl_sys_num_events = 0; wants_count = CS_MAXCODE + 1 + count_var(ext_sys_var); wants = emalloc_zero(wants_count); gotvar = 0; while (NULL != (v = ctl_getitem(sys_var, &valuep))) { if (!(EOV & v->flags)) { INSIST(v->code < wants_count); wants[v->code] = 1; gotvar = 1; } else { v = ctl_getitem(ext_sys_var, &valuep); if (NULL == v) { ctl_error(CERR_BADVALUE); free(wants); return; } if (EOV & v->flags) { ctl_error(CERR_UNKNOWNVAR); free(wants); return; } n = v->code + CS_MAXCODE + 1; INSIST(n < wants_count); wants[n] = 1; gotvar = 1; } } if (gotvar) { for (n = 1; n <= CS_MAXCODE; n++) if (wants[n]) ctl_putsys(n); for (n = 0; n + CS_MAXCODE + 1 < wants_count; n++) if (wants[n + CS_MAXCODE + 1]) { pch = ext_sys_var[n].text; ctl_putdata(pch, strlen(pch), 0); } } else { for (cs = def_sys_var; *cs != 0; cs++) ctl_putsys((int)*cs); for (kv = ext_sys_var; kv && !(EOV & kv->flags); kv++) if (DEF & kv->flags) ctl_putdata(kv->text, strlen(kv->text), 0); } free(wants); ctl_flushpkt(0); } /* * read_variables - return the variables the caller asks for */ /*ARGSUSED*/ static void read_variables( struct recvbuf *rbufp, int restrict_mask ) { if (res_associd) read_peervars(); else read_sysvars(); } /* * write_variables - write into variables. We only allow leap bit * writing this way. */ /*ARGSUSED*/ static void write_variables( struct recvbuf *rbufp, int restrict_mask ) { const struct ctl_var *v; int ext_var; char *valuep; long val; size_t octets; char *vareqv; const char *t; char *tt; val = 0; /* * If he's trying to write into a peer tell him no way */ if (res_associd != 0) { ctl_error(CERR_PERMISSION); return; } /* * Set status */ rpkt.status = htons(ctlsysstatus()); /* * Look through the variables. Dump out at the first sign of * trouble. */ while ((v = ctl_getitem(sys_var, &valuep)) != NULL) { ext_var = 0; if (v->flags & EOV) { v = ctl_getitem(ext_sys_var, &valuep); if (v != NULL) { if (v->flags & EOV) { ctl_error(CERR_UNKNOWNVAR); return; } ext_var = 1; } else { break; } } if (!(v->flags & CAN_WRITE)) { ctl_error(CERR_PERMISSION); return; } /* [bug 3565] writing makes sense only if we *have* a * value in the packet! */ if (valuep == NULL) { ctl_error(CERR_BADFMT); return; } if (!ext_var) { if ( !(*valuep && atoint(valuep, &val))) { ctl_error(CERR_BADFMT); return; } if ((val & ~LEAP_NOTINSYNC) != 0) { ctl_error(CERR_BADVALUE); return; } } if (ext_var) { octets = strlen(v->text) + strlen(valuep) + 2; vareqv = emalloc(octets); tt = vareqv; t = v->text; while (*t && *t != '=') *tt++ = *t++; *tt++ = '='; memcpy(tt, valuep, 1 + strlen(valuep)); set_sys_var(vareqv, 1 + strlen(vareqv), v->flags); free(vareqv); } else { ctl_error(CERR_UNSPEC); /* really */ return; } } /* * If we got anything, do it. xxx nothing to do *** */ /* if (leapind != ~0 || leapwarn != ~0) { if (!leap_setleap((int)leapind, (int)leapwarn)) { ctl_error(CERR_PERMISSION); return; } } */ ctl_flushpkt(0); } /* * configure() processes ntpq :config/config-from-file, allowing * generic runtime reconfiguration. */ static void configure( struct recvbuf *rbufp, int restrict_mask ) { size_t data_count; int retval; /* I haven't yet implemented changes to an existing association. * Hence check if the association id is 0 */ if (res_associd != 0) { ctl_error(CERR_BADVALUE); return; } if (RES_NOMODIFY & restrict_mask) { snprintf(remote_config.err_msg, sizeof(remote_config.err_msg), "runtime configuration prohibited by restrict ... nomodify"); ctl_putdata(remote_config.err_msg, strlen(remote_config.err_msg), 0); ctl_flushpkt(0); NLOG(NLOG_SYSINFO) msyslog(LOG_NOTICE, "runtime config from %s rejected due to nomodify restriction", stoa(&rbufp->recv_srcadr)); sys_restricted++; return; } /* Initialize the remote config buffer */ data_count = remoteconfig_cmdlength(reqpt, reqend); if (data_count > sizeof(remote_config.buffer) - 2) { snprintf(remote_config.err_msg, sizeof(remote_config.err_msg), "runtime configuration failed: request too long"); ctl_putdata(remote_config.err_msg, strlen(remote_config.err_msg), 0); ctl_flushpkt(0); msyslog(LOG_NOTICE, "runtime config from %s rejected: request too long", stoa(&rbufp->recv_srcadr)); return; } /* Bug 2853 -- check if all characters were acceptable */ if (data_count != (size_t)(reqend - reqpt)) { snprintf(remote_config.err_msg, sizeof(remote_config.err_msg), "runtime configuration failed: request contains an unprintable character"); ctl_putdata(remote_config.err_msg, strlen(remote_config.err_msg), 0); ctl_flushpkt(0); msyslog(LOG_NOTICE, "runtime config from %s rejected: request contains an unprintable character: %0x", stoa(&rbufp->recv_srcadr), reqpt[data_count]); return; } memcpy(remote_config.buffer, reqpt, data_count); /* The buffer has no trailing linefeed or NUL right now. For * logging, we do not want a newline, so we do that first after * adding the necessary NUL byte. */ remote_config.buffer[data_count] = '\0'; DPRINTF(1, ("Got Remote Configuration Command: %s\n", remote_config.buffer)); msyslog(LOG_NOTICE, "%s config: %s", stoa(&rbufp->recv_srcadr), remote_config.buffer); /* Now we have to make sure there is a NL/NUL sequence at the * end of the buffer before we parse it. */ remote_config.buffer[data_count++] = '\n'; remote_config.buffer[data_count] = '\0'; remote_config.pos = 0; remote_config.err_pos = 0; remote_config.no_errors = 0; config_remotely(&rbufp->recv_srcadr); /* * Check if errors were reported. If not, output 'Config * Succeeded'. Else output the error count. It would be nice * to output any parser error messages. */ if (0 == remote_config.no_errors) { retval = snprintf(remote_config.err_msg, sizeof(remote_config.err_msg), "Config Succeeded"); if (retval > 0) remote_config.err_pos += retval; } ctl_putdata(remote_config.err_msg, remote_config.err_pos, 0); ctl_flushpkt(0); DPRINTF(1, ("Reply: %s\n", remote_config.err_msg)); if (remote_config.no_errors > 0) msyslog(LOG_NOTICE, "%d error in %s config", remote_config.no_errors, stoa(&rbufp->recv_srcadr)); } /* * derive_nonce - generate 32-bit nonce value derived from the client * address and a request-specific timestamp. * * This uses MD5 for a non-authentication purpose -- the nonce is used * analogous to the TCP 3-way handshake to confirm the UDP client can * receive traffic from which it claims to originate, that is, to * prevent spoofed requests leading to reflected amplification. */ static u_int32 derive_nonce( sockaddr_u * addr, u_int32 ts_i, u_int32 ts_f ) { static u_int32 salt[4]; static u_long last_salt_update; MD5_CTX ctx; union d_tag { u_char digest[MD5_DIGEST_LENGTH]; u_int32 extract; } d; while (!salt[0] || current_time - last_salt_update >= 3600) { salt[0] = ntp_random(); salt[1] = ntp_random(); salt[2] = ntp_random(); salt[3] = ntp_random(); last_salt_update = current_time; } MD5Init(&ctx); MD5Update(&ctx, salt, sizeof(salt)); MD5Update(&ctx, &ts_i, sizeof(ts_i)); MD5Update(&ctx, &ts_f, sizeof(ts_f)); if (IS_IPV4(addr)) { MD5Update(&ctx, &SOCK_ADDR4(addr), sizeof(SOCK_ADDR4(addr))); } else { MD5Update(&ctx, &SOCK_ADDR6(addr), sizeof(SOCK_ADDR6(addr))); } MD5Update(&ctx, &NSRCPORT(addr), sizeof(NSRCPORT(addr))); MD5Update(&ctx, salt, sizeof(salt)); MD5Final(d.digest, &ctx); return d.extract; } /* * generate_nonce - generate client-address-specific nonce string. */ static void generate_nonce( struct recvbuf * rbufp, char * nonce, size_t nonce_octets ) { u_int32 derived; derived = derive_nonce(&rbufp->recv_srcadr, rbufp->recv_time.l_ui, rbufp->recv_time.l_uf); snprintf(nonce, nonce_octets, "%08x%08x%08x", rbufp->recv_time.l_ui, rbufp->recv_time.l_uf, derived); } /* * validate_nonce - validate client-address-specific nonce string. * * Returns TRUE if the local calculation of the nonce matches the * client-provided value and the timestamp is recent enough. */ static int validate_nonce( const char * pnonce, struct recvbuf * rbufp ) { u_int ts_i; u_int ts_f; l_fp ts; l_fp now_delta; u_int supposed; u_int derived; if (3 != sscanf(pnonce, "%08x%08x%08x", &ts_i, &ts_f, &supposed)) return FALSE; ts.l_ui = (u_int32)ts_i; ts.l_uf = (u_int32)ts_f; derived = derive_nonce(&rbufp->recv_srcadr, ts.l_ui, ts.l_uf); get_systime(&now_delta); L_SUB(&now_delta, &ts); return (supposed == derived && now_delta.l_ui < 16); } /* * send_random_tag_value - send a randomly-generated three character * tag prefix, a '.', an index, a '=' and a * random integer value. * * To try to force clients to ignore unrecognized tags in mrulist, * reslist, and ifstats responses, the first and last rows are spiced * with randomly-generated tag names with correct .# index. Make it * three characters knowing that none of the currently-used subscripted * tags have that length, avoiding the need to test for * tag collision. */ static void send_random_tag_value( int indx ) { int noise; char buf[32]; noise = rand() ^ (rand() << 16); buf[0] = 'a' + noise % 26; noise >>= 5; buf[1] = 'a' + noise % 26; noise >>= 5; buf[2] = 'a' + noise % 26; noise >>= 5; buf[3] = '.'; snprintf(&buf[4], sizeof(buf) - 4, "%d", indx); ctl_putuint(buf, noise); } /* * Send a MRU list entry in response to a "ntpq -c mrulist" operation. * * To keep clients honest about not depending on the order of values, * and thereby avoid being locked into ugly workarounds to maintain * backward compatibility later as new fields are added to the response, * the order is random. */ static void send_mru_entry( mon_entry * mon, int count ) { const char first_fmt[] = "first.%d"; const char ct_fmt[] = "ct.%d"; const char mv_fmt[] = "mv.%d"; const char rs_fmt[] = "rs.%d"; char tag[32]; u_char sent[6]; /* 6 tag=value pairs */ u_int32 noise; u_int which; u_int remaining; const char * pch; remaining = COUNTOF(sent); ZERO(sent); noise = (u_int32)(rand() ^ (rand() << 16)); while (remaining > 0) { which = (noise & 7) % COUNTOF(sent); noise >>= 3; while (sent[which]) which = (which + 1) % COUNTOF(sent); switch (which) { case 0: snprintf(tag, sizeof(tag), addr_fmt, count); pch = sptoa(&mon->rmtadr); ctl_putunqstr(tag, pch, strlen(pch)); break; case 1: snprintf(tag, sizeof(tag), last_fmt, count); ctl_putts(tag, &mon->last); break; case 2: snprintf(tag, sizeof(tag), first_fmt, count); ctl_putts(tag, &mon->first); break; case 3: snprintf(tag, sizeof(tag), ct_fmt, count); ctl_putint(tag, mon->count); break; case 4: snprintf(tag, sizeof(tag), mv_fmt, count); ctl_putuint(tag, mon->vn_mode); break; case 5: snprintf(tag, sizeof(tag), rs_fmt, count); ctl_puthex(tag, mon->flags); break; } sent[which] = TRUE; remaining--; } } /* * read_mru_list - supports ntpq's mrulist command. * * The challenge here is to match ntpdc's monlist functionality without * being limited to hundreds of entries returned total, and without * requiring state on the server. If state were required, ntpq's * mrulist command would require authentication. * * The approach was suggested by Ry Jones. A finite and variable number * of entries are retrieved per request, to avoid having responses with * such large numbers of packets that socket buffers are overflowed and * packets lost. The entries are retrieved oldest-first, taking into * account that the MRU list will be changing between each request. We * can expect to see duplicate entries for addresses updated in the MRU * list during the fetch operation. In the end, the client can assemble * a close approximation of the MRU list at the point in time the last * response was sent by ntpd. The only difference is it may be longer, * containing some number of oldest entries which have since been * reclaimed. If necessary, the protocol could be extended to zap those * from the client snapshot at the end, but so far that doesn't seem * useful. * * To accomodate the changing MRU list, the starting point for requests * after the first request is supplied as a series of last seen * timestamps and associated addresses, the newest ones the client has * received. As long as at least one of those entries hasn't been * bumped to the head of the MRU list, ntpd can pick up at that point. * Otherwise, the request is failed and it is up to ntpq to back up and * provide the next newest entry's timestamps and addresses, conceivably * backing up all the way to the starting point. * * input parameters: * nonce= Regurgitated nonce retrieved by the client * previously using CTL_OP_REQ_NONCE, demonstrating * ability to receive traffic sent to its address. * frags= Limit on datagrams (fragments) in response. Used * by newer ntpq versions instead of limit= when * retrieving multiple entries. * limit= Limit on MRU entries returned. One of frags= or * limit= must be provided. * limit=1 is a special case: Instead of fetching * beginning with the supplied starting point's * newer neighbor, fetch the supplied entry, and * in that case the #.last timestamp can be zero. * This enables fetching a single entry by IP * address. When limit is not one and frags= is * provided, the fragment limit controls. * mincount= (decimal) Return entries with count >= mincount. * laddr= Return entries associated with the server's IP * address given. No port specification is needed, * and any supplied is ignored. * resall= 0x-prefixed hex restrict bits which must all be * lit for an MRU entry to be included. * Has precedence over any resany=. * resany= 0x-prefixed hex restrict bits, at least one of * which must be list for an MRU entry to be * included. * last.0= 0x-prefixed hex l_fp timestamp of newest entry * which client previously received. * addr.0= text of newest entry's IP address and port, * IPv6 addresses in bracketed form: [::]:123 * last.1= timestamp of 2nd newest entry client has. * addr.1= address of 2nd newest entry. * [...] * * ntpq provides as many last/addr pairs as will fit in a single request * packet, except for the first request in a MRU fetch operation. * * The response begins with a new nonce value to be used for any * followup request. Following the nonce is the next newer entry than * referred to by last.0 and addr.0, if the "0" entry has not been * bumped to the front. If it has, the first entry returned will be the * next entry newer than referred to by last.1 and addr.1, and so on. * If none of the referenced entries remain unchanged, the request fails * and ntpq backs up to the next earlier set of entries to resync. * * Except for the first response, the response begins with confirmation * of the entry that precedes the first additional entry provided: * * last.older= hex l_fp timestamp matching one of the input * .last timestamps, which entry now precedes the * response 0. entry in the MRU list. * addr.older= text of address corresponding to older.last. * * And in any case, a successful response contains sets of values * comprising entries, with the oldest numbered 0 and incrementing from * there: * * addr.# text of IPv4 or IPv6 address and port * last.# hex l_fp timestamp of last receipt * first.# hex l_fp timestamp of first receipt * ct.# count of packets received * mv.# mode and version * rs.# restriction mask (RES_* bits) * * Note the code currently assumes there are no valid three letter * tags sent with each row, and needs to be adjusted if that changes. * * The client should accept the values in any order, and ignore .# * values which it does not understand, to allow a smooth path to * future changes without requiring a new opcode. Clients can rely * on all *.0 values preceding any *.1 values, that is all values for * a given index number are together in the response. * * The end of the response list is noted with one or two tag=value * pairs. Unconditionally: * * now= 0x-prefixed l_fp timestamp at the server marking * the end of the operation. * * If any entries were returned, now= is followed by: * * last.newest= hex l_fp identical to last.# of the prior * entry. */ static void read_mru_list( struct recvbuf *rbufp, int restrict_mask ) { static const char nulltxt[1] = { '\0' }; static const char nonce_text[] = "nonce"; static const char frags_text[] = "frags"; static const char limit_text[] = "limit"; static const char mincount_text[] = "mincount"; static const char resall_text[] = "resall"; static const char resany_text[] = "resany"; static const char maxlstint_text[] = "maxlstint"; static const char laddr_text[] = "laddr"; static const char resaxx_fmt[] = "0x%hx"; u_int limit; u_short frags; u_short resall; u_short resany; int mincount; u_int maxlstint; sockaddr_u laddr; endpt * lcladr; u_int count; u_int ui; u_int uf; l_fp last[16]; sockaddr_u addr[COUNTOF(last)]; char buf[128]; struct ctl_var * in_parms; const struct ctl_var * v; const char * val; const char * pch; char * pnonce; int nonce_valid; size_t i; int priors; u_short hash; mon_entry * mon; mon_entry * prior_mon; l_fp now; if (RES_NOMRULIST & restrict_mask) { ctl_error(CERR_PERMISSION); NLOG(NLOG_SYSINFO) msyslog(LOG_NOTICE, "mrulist from %s rejected due to nomrulist restriction", stoa(&rbufp->recv_srcadr)); sys_restricted++; return; } /* * fill in_parms var list with all possible input parameters. */ in_parms = NULL; set_var(&in_parms, nonce_text, sizeof(nonce_text), 0); set_var(&in_parms, frags_text, sizeof(frags_text), 0); set_var(&in_parms, limit_text, sizeof(limit_text), 0); set_var(&in_parms, mincount_text, sizeof(mincount_text), 0); set_var(&in_parms, resall_text, sizeof(resall_text), 0); set_var(&in_parms, resany_text, sizeof(resany_text), 0); set_var(&in_parms, maxlstint_text, sizeof(maxlstint_text), 0); set_var(&in_parms, laddr_text, sizeof(laddr_text), 0); for (i = 0; i < COUNTOF(last); i++) { snprintf(buf, sizeof(buf), last_fmt, (int)i); set_var(&in_parms, buf, strlen(buf) + 1, 0); snprintf(buf, sizeof(buf), addr_fmt, (int)i); set_var(&in_parms, buf, strlen(buf) + 1, 0); } /* decode input parms */ pnonce = NULL; frags = 0; limit = 0; mincount = 0; resall = 0; resany = 0; maxlstint = 0; lcladr = NULL; priors = 0; ZERO(last); ZERO(addr); /* have to go through '(void*)' to drop 'const' property from pointer. * ctl_getitem()' needs some cleanup, too.... perlinger@ntp.org */ while (NULL != (v = ctl_getitem(in_parms, (void*)&val)) && !(EOV & v->flags)) { int si; if (NULL == val) val = nulltxt; if (!strcmp(nonce_text, v->text)) { free(pnonce); pnonce = (*val) ? estrdup(val) : NULL; } else if (!strcmp(frags_text, v->text)) { if (1 != sscanf(val, "%hu", &frags)) goto blooper; } else if (!strcmp(limit_text, v->text)) { if (1 != sscanf(val, "%u", &limit)) goto blooper; } else if (!strcmp(mincount_text, v->text)) { if (1 != sscanf(val, "%d", &mincount)) goto blooper; if (mincount < 0) mincount = 0; } else if (!strcmp(resall_text, v->text)) { if (1 != sscanf(val, resaxx_fmt, &resall)) goto blooper; } else if (!strcmp(resany_text, v->text)) { if (1 != sscanf(val, resaxx_fmt, &resany)) goto blooper; } else if (!strcmp(maxlstint_text, v->text)) { if (1 != sscanf(val, "%u", &maxlstint)) goto blooper; } else if (!strcmp(laddr_text, v->text)) { if (!decodenetnum(val, &laddr)) goto blooper; lcladr = getinterface(&laddr, 0); } else if (1 == sscanf(v->text, last_fmt, &si) && (size_t)si < COUNTOF(last)) { if (2 != sscanf(val, "0x%08x.%08x", &ui, &uf)) goto blooper; last[si].l_ui = ui; last[si].l_uf = uf; if (!SOCK_UNSPEC(&addr[si]) && si == priors) priors++; } else if (1 == sscanf(v->text, addr_fmt, &si) && (size_t)si < COUNTOF(addr)) { if (!decodenetnum(val, &addr[si])) goto blooper; if (last[si].l_ui && last[si].l_uf && si == priors) priors++; } else { DPRINTF(1, ("read_mru_list: invalid key item: '%s' (ignored)\n", v->text)); continue; blooper: DPRINTF(1, ("read_mru_list: invalid param for '%s': '%s' (bailing)\n", v->text, val)); free(pnonce); pnonce = NULL; break; } } free_varlist(in_parms); in_parms = NULL; /* return no responses until the nonce is validated */ if (NULL == pnonce) return; nonce_valid = validate_nonce(pnonce, rbufp); free(pnonce); if (!nonce_valid) return; if ((0 == frags && !(0 < limit && limit <= MRU_ROW_LIMIT)) || frags > MRU_FRAGS_LIMIT) { ctl_error(CERR_BADVALUE); return; } /* * If either frags or limit is not given, use the max. */ if (0 != frags && 0 == limit) limit = UINT_MAX; else if (0 != limit && 0 == frags) frags = MRU_FRAGS_LIMIT; /* * Find the starting point if one was provided. */ mon = NULL; for (i = 0; i < (size_t)priors; i++) { hash = MON_HASH(&addr[i]); for (mon = mon_hash[hash]; mon != NULL; mon = mon->hash_next) if (ADDR_PORT_EQ(&mon->rmtadr, &addr[i])) break; if (mon != NULL) { if (L_ISEQU(&mon->last, &last[i])) break; mon = NULL; } } /* If a starting point was provided... */ if (priors) { /* and none could be found unmodified... */ if (NULL == mon) { /* tell ntpq to try again with older entries */ ctl_error(CERR_UNKNOWNVAR); return; } /* confirm the prior entry used as starting point */ ctl_putts("last.older", &mon->last); pch = sptoa(&mon->rmtadr); ctl_putunqstr("addr.older", pch, strlen(pch)); /* * Move on to the first entry the client doesn't have, * except in the special case of a limit of one. In * that case return the starting point entry. */ if (limit > 1) mon = PREV_DLIST(mon_mru_list, mon, mru); } else { /* start with the oldest */ mon = TAIL_DLIST(mon_mru_list, mru); } /* * send up to limit= entries in up to frags= datagrams */ get_systime(&now); generate_nonce(rbufp, buf, sizeof(buf)); ctl_putunqstr("nonce", buf, strlen(buf)); prior_mon = NULL; for (count = 0; mon != NULL && res_frags < frags && count < limit; mon = PREV_DLIST(mon_mru_list, mon, mru)) { if (mon->count < mincount) continue; if (resall && resall != (resall & mon->flags)) continue; if (resany && !(resany & mon->flags)) continue; if (maxlstint > 0 && now.l_ui - mon->last.l_ui > maxlstint) continue; if (lcladr != NULL && mon->lcladr != lcladr) continue; send_mru_entry(mon, count); if (!count) send_random_tag_value(0); count++; prior_mon = mon; } /* * If this batch completes the MRU list, say so explicitly with * a now= l_fp timestamp. */ if (NULL == mon) { if (count > 1) send_random_tag_value(count - 1); ctl_putts("now", &now); /* if any entries were returned confirm the last */ if (prior_mon != NULL) ctl_putts("last.newest", &prior_mon->last); } ctl_flushpkt(0); } /* * Send a ifstats entry in response to a "ntpq -c ifstats" request. * * To keep clients honest about not depending on the order of values, * and thereby avoid being locked into ugly workarounds to maintain * backward compatibility later as new fields are added to the response, * the order is random. */ static void send_ifstats_entry( endpt * la, u_int ifnum ) { const char addr_fmtu[] = "addr.%u"; const char bcast_fmt[] = "bcast.%u"; const char en_fmt[] = "en.%u"; /* enabled */ const char name_fmt[] = "name.%u"; const char flags_fmt[] = "flags.%u"; const char tl_fmt[] = "tl.%u"; /* ttl */ const char mc_fmt[] = "mc.%u"; /* mcast count */ const char rx_fmt[] = "rx.%u"; const char tx_fmt[] = "tx.%u"; const char txerr_fmt[] = "txerr.%u"; const char pc_fmt[] = "pc.%u"; /* peer count */ const char up_fmt[] = "up.%u"; /* uptime */ char tag[32]; u_char sent[IFSTATS_FIELDS]; /* 12 tag=value pairs */ int noisebits; u_int32 noise; u_int which; u_int remaining; const char *pch; remaining = COUNTOF(sent); ZERO(sent); noise = 0; noisebits = 0; while (remaining > 0) { if (noisebits < 4) { noise = rand() ^ (rand() << 16); noisebits = 31; } which = (noise & 0xf) % COUNTOF(sent); noise >>= 4; noisebits -= 4; while (sent[which]) which = (which + 1) % COUNTOF(sent); switch (which) { case 0: snprintf(tag, sizeof(tag), addr_fmtu, ifnum); pch = sptoa(&la->sin); ctl_putunqstr(tag, pch, strlen(pch)); break; case 1: snprintf(tag, sizeof(tag), bcast_fmt, ifnum); if (INT_BCASTOPEN & la->flags) pch = sptoa(&la->bcast); else pch = ""; ctl_putunqstr(tag, pch, strlen(pch)); break; case 2: snprintf(tag, sizeof(tag), en_fmt, ifnum); ctl_putint(tag, !la->ignore_packets); break; case 3: snprintf(tag, sizeof(tag), name_fmt, ifnum); ctl_putstr(tag, la->name, strlen(la->name)); break; case 4: snprintf(tag, sizeof(tag), flags_fmt, ifnum); ctl_puthex(tag, (u_int)la->flags); break; case 5: snprintf(tag, sizeof(tag), tl_fmt, ifnum); ctl_putint(tag, la->last_ttl); break; case 6: snprintf(tag, sizeof(tag), mc_fmt, ifnum); ctl_putint(tag, la->num_mcast); break; case 7: snprintf(tag, sizeof(tag), rx_fmt, ifnum); ctl_putint(tag, la->received); break; case 8: snprintf(tag, sizeof(tag), tx_fmt, ifnum); ctl_putint(tag, la->sent); break; case 9: snprintf(tag, sizeof(tag), txerr_fmt, ifnum); ctl_putint(tag, la->notsent); break; case 10: snprintf(tag, sizeof(tag), pc_fmt, ifnum); ctl_putuint(tag, la->peercnt); break; case 11: snprintf(tag, sizeof(tag), up_fmt, ifnum); ctl_putuint(tag, current_time - la->starttime); break; } sent[which] = TRUE; remaining--; } send_random_tag_value((int)ifnum); } /* * read_ifstats - send statistics for each local address, exposed by * ntpq -c ifstats */ static void read_ifstats( struct recvbuf * rbufp ) { u_int ifidx; endpt * la; /* * loop over [0..sys_ifnum] searching ep_list for each * ifnum in turn. */ for (ifidx = 0; ifidx < sys_ifnum; ifidx++) { for (la = ep_list; la != NULL; la = la->elink) if (ifidx == la->ifnum) break; if (NULL == la) continue; /* return stats for one local address */ send_ifstats_entry(la, ifidx); } ctl_flushpkt(0); } static void sockaddrs_from_restrict_u( sockaddr_u * psaA, sockaddr_u * psaM, restrict_u * pres, int ipv6 ) { ZERO(*psaA); ZERO(*psaM); if (!ipv6) { psaA->sa.sa_family = AF_INET; psaA->sa4.sin_addr.s_addr = htonl(pres->u.v4.addr); psaM->sa.sa_family = AF_INET; psaM->sa4.sin_addr.s_addr = htonl(pres->u.v4.mask); } else { psaA->sa.sa_family = AF_INET6; memcpy(&psaA->sa6.sin6_addr, &pres->u.v6.addr, sizeof(psaA->sa6.sin6_addr)); psaM->sa.sa_family = AF_INET6; memcpy(&psaM->sa6.sin6_addr, &pres->u.v6.mask, sizeof(psaA->sa6.sin6_addr)); } } /* * Send a restrict entry in response to a "ntpq -c reslist" request. * * To keep clients honest about not depending on the order of values, * and thereby avoid being locked into ugly workarounds to maintain * backward compatibility later as new fields are added to the response, * the order is random. */ static void send_restrict_entry( restrict_u * pres, int ipv6, u_int idx ) { const char addr_fmtu[] = "addr.%u"; const char mask_fmtu[] = "mask.%u"; const char hits_fmt[] = "hits.%u"; const char flags_fmt[] = "flags.%u"; char tag[32]; u_char sent[RESLIST_FIELDS]; /* 4 tag=value pairs */ int noisebits; u_int32 noise; u_int which; u_int remaining; sockaddr_u addr; sockaddr_u mask; const char * pch; char * buf; const char * match_str; const char * access_str; sockaddrs_from_restrict_u(&addr, &mask, pres, ipv6); remaining = COUNTOF(sent); ZERO(sent); noise = 0; noisebits = 0; while (remaining > 0) { if (noisebits < 2) { noise = rand() ^ (rand() << 16); noisebits = 31; } which = (noise & 0x3) % COUNTOF(sent); noise >>= 2; noisebits -= 2; while (sent[which]) which = (which + 1) % COUNTOF(sent); /* XXX: Numbers? Really? */ switch (which) { case 0: snprintf(tag, sizeof(tag), addr_fmtu, idx); pch = stoa(&addr); ctl_putunqstr(tag, pch, strlen(pch)); break; case 1: snprintf(tag, sizeof(tag), mask_fmtu, idx); pch = stoa(&mask); ctl_putunqstr(tag, pch, strlen(pch)); break; case 2: snprintf(tag, sizeof(tag), hits_fmt, idx); ctl_putuint(tag, pres->count); break; case 3: snprintf(tag, sizeof(tag), flags_fmt, idx); match_str = res_match_flags(pres->mflags); access_str = res_access_flags(pres->rflags); if ('\0' == match_str[0]) { pch = access_str; } else { LIB_GETBUF(buf); snprintf(buf, LIB_BUFLENGTH, "%s %s", match_str, access_str); pch = buf; } ctl_putunqstr(tag, pch, strlen(pch)); break; } sent[which] = TRUE; remaining--; } send_random_tag_value((int)idx); } static void send_restrict_list( restrict_u * pres, int ipv6, u_int * pidx ) { for ( ; pres != NULL; pres = pres->link) { send_restrict_entry(pres, ipv6, *pidx); (*pidx)++; } } /* * read_addr_restrictions - returns IPv4 and IPv6 access control lists */ static void read_addr_restrictions( struct recvbuf * rbufp ) { u_int idx; idx = 0; send_restrict_list(restrictlist4, FALSE, &idx); send_restrict_list(restrictlist6, TRUE, &idx); ctl_flushpkt(0); } /* * read_ordlist - CTL_OP_READ_ORDLIST_A for ntpq -c ifstats & reslist */ static void read_ordlist( struct recvbuf * rbufp, int restrict_mask ) { const char ifstats_s[] = "ifstats"; const size_t ifstats_chars = COUNTOF(ifstats_s) - 1; const char addr_rst_s[] = "addr_restrictions"; const size_t a_r_chars = COUNTOF(addr_rst_s) - 1; struct ntp_control * cpkt; u_short qdata_octets; /* * CTL_OP_READ_ORDLIST_A was first named CTL_OP_READ_IFSTATS and * used only for ntpq -c ifstats. With the addition of reslist * the same opcode was generalized to retrieve ordered lists * which require authentication. The request data is empty or * contains "ifstats" (not null terminated) to retrieve local * addresses and associated stats. It is "addr_restrictions" * to retrieve the IPv4 then IPv6 remote address restrictions, * which are access control lists. Other request data return * CERR_UNKNOWNVAR. */ cpkt = (struct ntp_control *)&rbufp->recv_pkt; qdata_octets = ntohs(cpkt->count); if (0 == qdata_octets || (ifstats_chars == qdata_octets && !memcmp(ifstats_s, cpkt->u.data, ifstats_chars))) { read_ifstats(rbufp); return; } if (a_r_chars == qdata_octets && !memcmp(addr_rst_s, cpkt->u.data, a_r_chars)) { read_addr_restrictions(rbufp); return; } ctl_error(CERR_UNKNOWNVAR); } /* * req_nonce - CTL_OP_REQ_NONCE for ntpq -c mrulist prerequisite. */ static void req_nonce( struct recvbuf * rbufp, int restrict_mask ) { char buf[64]; generate_nonce(rbufp, buf, sizeof(buf)); ctl_putunqstr("nonce", buf, strlen(buf)); ctl_flushpkt(0); } /* * read_clockstatus - return clock radio status */ /*ARGSUSED*/ static void read_clockstatus( struct recvbuf *rbufp, int restrict_mask ) { #ifndef REFCLOCK /* * If no refclock support, no data to return */ ctl_error(CERR_BADASSOC); #else const struct ctl_var * v; int i; struct peer * peer; char * valuep; u_char * wants; size_t wants_alloc; int gotvar; const u_char * cc; struct ctl_var * kv; struct refclockstat cs; if (res_associd != 0) { peer = findpeerbyassoc(res_associd); } else { /* * Find a clock for this jerk. If the system peer * is a clock use it, else search peer_list for one. */ if (sys_peer != NULL && (FLAG_REFCLOCK & sys_peer->flags)) peer = sys_peer; else for (peer = peer_list; peer != NULL; peer = peer->p_link) if (FLAG_REFCLOCK & peer->flags) break; } if (NULL == peer || !(FLAG_REFCLOCK & peer->flags)) { ctl_error(CERR_BADASSOC); return; } /* * If we got here we have a peer which is a clock. Get his * status. */ cs.kv_list = NULL; refclock_control(&peer->srcadr, NULL, &cs); kv = cs.kv_list; /* * Look for variables in the packet. */ rpkt.status = htons(ctlclkstatus(&cs)); wants_alloc = CC_MAXCODE + 1 + count_var(kv); wants = emalloc_zero(wants_alloc); gotvar = FALSE; while (NULL != (v = ctl_getitem(clock_var, &valuep))) { if (!(EOV & v->flags)) { wants[v->code] = TRUE; gotvar = TRUE; } else { v = ctl_getitem(kv, &valuep); if (NULL == v) { ctl_error(CERR_BADVALUE); free(wants); free_varlist(cs.kv_list); return; } if (EOV & v->flags) { ctl_error(CERR_UNKNOWNVAR); free(wants); free_varlist(cs.kv_list); return; } wants[CC_MAXCODE + 1 + v->code] = TRUE; gotvar = TRUE; } } if (gotvar) { for (i = 1; i <= CC_MAXCODE; i++) if (wants[i]) ctl_putclock(i, &cs, TRUE); if (kv != NULL) for (i = 0; !(EOV & kv[i].flags); i++) if (wants[i + CC_MAXCODE + 1]) ctl_putdata(kv[i].text, strlen(kv[i].text), FALSE); } else { for (cc = def_clock_var; *cc != 0; cc++) ctl_putclock((int)*cc, &cs, FALSE); for ( ; kv != NULL && !(EOV & kv->flags); kv++) if (DEF & kv->flags) ctl_putdata(kv->text, strlen(kv->text), FALSE); } free(wants); free_varlist(cs.kv_list); ctl_flushpkt(0); #endif } /* * write_clockstatus - we don't do this */ /*ARGSUSED*/ static void write_clockstatus( struct recvbuf *rbufp, int restrict_mask ) { ctl_error(CERR_PERMISSION); } /* * Trap support from here on down. We send async trap messages when the * upper levels report trouble. Traps can by set either by control * messages or by configuration. */ /* * set_trap - set a trap in response to a control message */ static void set_trap( struct recvbuf *rbufp, int restrict_mask ) { int traptype; /* * See if this guy is allowed */ if (restrict_mask & RES_NOTRAP) { ctl_error(CERR_PERMISSION); return; } /* * Determine his allowed trap type. */ traptype = TRAP_TYPE_PRIO; if (restrict_mask & RES_LPTRAP) traptype = TRAP_TYPE_NONPRIO; /* * Call ctlsettrap() to do the work. Return * an error if it can't assign the trap. */ if (!ctlsettrap(&rbufp->recv_srcadr, rbufp->dstadr, traptype, (int)res_version)) ctl_error(CERR_NORESOURCE); ctl_flushpkt(0); } /* * unset_trap - unset a trap in response to a control message */ static void unset_trap( struct recvbuf *rbufp, int restrict_mask ) { int traptype; /* * We don't prevent anyone from removing his own trap unless the * trap is configured. Note we also must be aware of the * possibility that restriction flags were changed since this * guy last set his trap. Set the trap type based on this. */ traptype = TRAP_TYPE_PRIO; if (restrict_mask & RES_LPTRAP) traptype = TRAP_TYPE_NONPRIO; /* * Call ctlclrtrap() to clear this out. */ if (!ctlclrtrap(&rbufp->recv_srcadr, rbufp->dstadr, traptype)) ctl_error(CERR_BADASSOC); ctl_flushpkt(0); } /* * ctlsettrap - called to set a trap */ int ctlsettrap( sockaddr_u *raddr, endpt *linter, int traptype, int version ) { size_t n; struct ctl_trap *tp; struct ctl_trap *tptouse; /* * See if we can find this trap. If so, we only need update * the flags and the time. */ if ((tp = ctlfindtrap(raddr, linter)) != NULL) { switch (traptype) { case TRAP_TYPE_CONFIG: tp->tr_flags = TRAP_INUSE|TRAP_CONFIGURED; break; case TRAP_TYPE_PRIO: if (tp->tr_flags & TRAP_CONFIGURED) return (1); /* don't change anything */ tp->tr_flags = TRAP_INUSE; break; case TRAP_TYPE_NONPRIO: if (tp->tr_flags & TRAP_CONFIGURED) return (1); /* don't change anything */ tp->tr_flags = TRAP_INUSE|TRAP_NONPRIO; break; } tp->tr_settime = current_time; tp->tr_resets++; return (1); } /* * First we heard of this guy. Try to find a trap structure * for him to use, clearing out lesser priority guys if we * have to. Clear out anyone who's expired while we're at it. */ tptouse = NULL; for (n = 0; n < COUNTOF(ctl_traps); n++) { tp = &ctl_traps[n]; if ((TRAP_INUSE & tp->tr_flags) && !(TRAP_CONFIGURED & tp->tr_flags) && ((tp->tr_settime + CTL_TRAPTIME) > current_time)) { tp->tr_flags = 0; num_ctl_traps--; } if (!(TRAP_INUSE & tp->tr_flags)) { tptouse = tp; } else if (!(TRAP_CONFIGURED & tp->tr_flags)) { switch (traptype) { case TRAP_TYPE_CONFIG: if (tptouse == NULL) { tptouse = tp; break; } if ((TRAP_NONPRIO & tptouse->tr_flags) && !(TRAP_NONPRIO & tp->tr_flags)) break; if (!(TRAP_NONPRIO & tptouse->tr_flags) && (TRAP_NONPRIO & tp->tr_flags)) { tptouse = tp; break; } if (tptouse->tr_origtime < tp->tr_origtime) tptouse = tp; break; case TRAP_TYPE_PRIO: if ( TRAP_NONPRIO & tp->tr_flags) { if (tptouse == NULL || ((TRAP_INUSE & tptouse->tr_flags) && tptouse->tr_origtime < tp->tr_origtime)) tptouse = tp; } break; case TRAP_TYPE_NONPRIO: break; } } } /* * If we don't have room for him return an error. */ if (tptouse == NULL) return (0); /* * Set up this structure for him. */ tptouse->tr_settime = tptouse->tr_origtime = current_time; tptouse->tr_count = tptouse->tr_resets = 0; tptouse->tr_sequence = 1; tptouse->tr_addr = *raddr; tptouse->tr_localaddr = linter; tptouse->tr_version = (u_char) version; tptouse->tr_flags = TRAP_INUSE; if (traptype == TRAP_TYPE_CONFIG) tptouse->tr_flags |= TRAP_CONFIGURED; else if (traptype == TRAP_TYPE_NONPRIO) tptouse->tr_flags |= TRAP_NONPRIO; num_ctl_traps++; return (1); } /* * ctlclrtrap - called to clear a trap */ int ctlclrtrap( sockaddr_u *raddr, endpt *linter, int traptype ) { register struct ctl_trap *tp; if ((tp = ctlfindtrap(raddr, linter)) == NULL) return (0); if (tp->tr_flags & TRAP_CONFIGURED && traptype != TRAP_TYPE_CONFIG) return (0); tp->tr_flags = 0; num_ctl_traps--; return (1); } /* * ctlfindtrap - find a trap given the remote and local addresses */ static struct ctl_trap * ctlfindtrap( sockaddr_u *raddr, endpt *linter ) { size_t n; for (n = 0; n < COUNTOF(ctl_traps); n++) if ((ctl_traps[n].tr_flags & TRAP_INUSE) && ADDR_PORT_EQ(raddr, &ctl_traps[n].tr_addr) && (linter == ctl_traps[n].tr_localaddr)) return &ctl_traps[n]; return NULL; } /* * report_event - report an event to the trappers */ void report_event( int err, /* error code */ struct peer *peer, /* peer structure pointer */ const char *str /* protostats string */ ) { char statstr[NTP_MAXSTRLEN]; int i; size_t len; /* * Report the error to the protostats file, system log and * trappers. */ if (peer == NULL) { /* * Discard a system report if the number of reports of * the same type exceeds the maximum. */ if (ctl_sys_last_event != (u_char)err) ctl_sys_num_events= 0; if (ctl_sys_num_events >= CTL_SYS_MAXEVENTS) return; ctl_sys_last_event = (u_char)err; ctl_sys_num_events++; snprintf(statstr, sizeof(statstr), "0.0.0.0 %04x %02x %s", ctlsysstatus(), err, eventstr(err)); if (str != NULL) { len = strlen(statstr); snprintf(statstr + len, sizeof(statstr) - len, " %s", str); } NLOG(NLOG_SYSEVENT) msyslog(LOG_INFO, "%s", statstr); } else { /* * Discard a peer report if the number of reports of * the same type exceeds the maximum for that peer. */ const char * src; u_char errlast; errlast = (u_char)err & ~PEER_EVENT; if (peer->last_event != errlast) peer->num_events = 0; if (peer->num_events >= CTL_PEER_MAXEVENTS) return; peer->last_event = errlast; peer->num_events++; if (ISREFCLOCKADR(&peer->srcadr)) src = refnumtoa(&peer->srcadr); else src = stoa(&peer->srcadr); snprintf(statstr, sizeof(statstr), "%s %04x %02x %s", src, ctlpeerstatus(peer), err, eventstr(err)); if (str != NULL) { len = strlen(statstr); snprintf(statstr + len, sizeof(statstr) - len, " %s", str); } NLOG(NLOG_PEEREVENT) msyslog(LOG_INFO, "%s", statstr); } record_proto_stats(statstr); #if DEBUG if (debug) printf("event at %lu %s\n", current_time, statstr); #endif /* * If no trappers, return. */ if (num_ctl_traps <= 0) return; /* [Bug 3119] * Peer Events should be associated with a peer -- hence the * name. But there are instances where this function is called * *without* a valid peer. This happens e.g. with an unsolicited * CryptoNAK, or when a leap second alarm is going off while * currently without a system peer. * * The most sensible approach to this seems to bail out here if * this happens. Avoiding to call this function would also * bypass the log reporting in the first part of this function, * and this is probably not the best of all options. * -*-perlinger@ntp.org-*- */ if ((err & PEER_EVENT) && !peer) return; /* * Set up the outgoing packet variables */ res_opcode = CTL_OP_ASYNCMSG; res_offset = 0; res_async = TRUE; res_authenticate = FALSE; datapt = rpkt.u.data; dataend = &rpkt.u.data[CTL_MAX_DATA_LEN]; if (!(err & PEER_EVENT)) { rpkt.associd = 0; rpkt.status = htons(ctlsysstatus()); /* Include the core system variables and the list. */ for (i = 1; i <= CS_VARLIST; i++) ctl_putsys(i); } else if (NULL != peer) { /* paranoia -- skip output */ rpkt.associd = htons(peer->associd); rpkt.status = htons(ctlpeerstatus(peer)); /* Dump it all. Later, maybe less. */ for (i = 1; i <= CP_MAX_NOAUTOKEY; i++) ctl_putpeer(i, peer); # ifdef REFCLOCK /* * for clock exception events: add clock variables to * reflect info on exception */ if (err == PEVNT_CLOCK) { struct refclockstat cs; struct ctl_var *kv; cs.kv_list = NULL; refclock_control(&peer->srcadr, NULL, &cs); ctl_puthex("refclockstatus", ctlclkstatus(&cs)); for (i = 1; i <= CC_MAXCODE; i++) ctl_putclock(i, &cs, FALSE); for (kv = cs.kv_list; kv != NULL && !(EOV & kv->flags); kv++) if (DEF & kv->flags) ctl_putdata(kv->text, strlen(kv->text), FALSE); free_varlist(cs.kv_list); } # endif /* REFCLOCK */ } /* * We're done, return. */ ctl_flushpkt(0); } /* * mprintf_event - printf-style varargs variant of report_event() */ int mprintf_event( int evcode, /* event code */ struct peer * p, /* may be NULL */ const char * fmt, /* msnprintf format */ ... ) { va_list ap; int rc; char msg[512]; va_start(ap, fmt); rc = mvsnprintf(msg, sizeof(msg), fmt, ap); va_end(ap); report_event(evcode, p, msg); return rc; } /* * ctl_clr_stats - clear stat counters */ void ctl_clr_stats(void) { ctltimereset = current_time; numctlreq = 0; numctlbadpkts = 0; numctlresponses = 0; numctlfrags = 0; numctlerrors = 0; numctlfrags = 0; numctltooshort = 0; numctlinputresp = 0; numctlinputfrag = 0; numctlinputerr = 0; numctlbadoffset = 0; numctlbadversion = 0; numctldatatooshort = 0; numctlbadop = 0; numasyncmsgs = 0; } static u_short count_var( const struct ctl_var *k ) { u_int c; if (NULL == k) return 0; c = 0; while (!(EOV & (k++)->flags)) c++; ENSURE(c <= USHRT_MAX); return (u_short)c; } char * add_var( struct ctl_var **kv, u_long size, u_short def ) { u_short c; struct ctl_var *k; char * buf; c = count_var(*kv); *kv = erealloc(*kv, (c + 2) * sizeof(**kv)); k = *kv; buf = emalloc(size); k[c].code = c; k[c].text = buf; k[c].flags = def; k[c + 1].code = 0; k[c + 1].text = NULL; k[c + 1].flags = EOV; return buf; } void set_var( struct ctl_var **kv, const char *data, u_long size, u_short def ) { struct ctl_var *k; const char *s; const char *t; char *td; if (NULL == data || !size) return; k = *kv; if (k != NULL) { while (!(EOV & k->flags)) { if (NULL == k->text) { td = emalloc(size); memcpy(td, data, size); k->text = td; k->flags = def; return; } else { s = data; t = k->text; while (*t != '=' && *s == *t) { s++; t++; } if (*s == *t && ((*t == '=') || !*t)) { td = erealloc((void *)(intptr_t)k->text, size); memcpy(td, data, size); k->text = td; k->flags = def; return; } } k++; } } td = add_var(kv, size, def); memcpy(td, data, size); } void set_sys_var( const char *data, u_long size, u_short def ) { set_var(&ext_sys_var, data, size, def); } /* * get_ext_sys_var() retrieves the value of a user-defined variable or * NULL if the variable has not been setvar'd. */ const char * get_ext_sys_var(const char *tag) { struct ctl_var * v; size_t c; const char * val; val = NULL; c = strlen(tag); for (v = ext_sys_var; !(EOV & v->flags); v++) { if (NULL != v->text && !memcmp(tag, v->text, c)) { if ('=' == v->text[c]) { val = v->text + c + 1; break; } else if ('\0' == v->text[c]) { val = ""; break; } } } return val; } void free_varlist( struct ctl_var *kv ) { struct ctl_var *k; if (kv) { for (k = kv; !(k->flags & EOV); k++) free((void *)(intptr_t)k->text); free((void *)kv); } }