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freebsd-nq/contrib/ntp/ntpd/ntp_control.c

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Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
/*
* ntp_control.c - respond to control messages and send async traps
*/
Fix a potential ROOT-exploit in NTPD. PR: 26358 Reviewed by: dima
2001-04-04 23:07:22 +00:00
/*
* $FreeBSD$
*/
Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/time.h>
#include "ntpd.h"
#include "ntp_io.h"
#include "ntp_refclock.h"
#include "ntp_control.h"
#include "ntp_stdlib.h"
/*
* Structure to hold request procedure information
*/
#define NOAUTH 0
#define AUTH 1
#define NO_REQUEST (-1)
struct ctl_proc {
short control_code; /* defined request code */
u_short flags; /* flags word */
void (*handler) P((struct recvbuf *, int)); /* routine to handle request */
};
/*
* Only one flag. Authentication required or not.
*/
#define NOAUTH 0
#define AUTH 1
/*
* Request processing routines
*/
static void ctl_error P((int));
static u_short ctlclkstatus P((struct refclockstat *));
static void ctl_flushpkt P((int));
static void ctl_putdata P((const char *, unsigned int, int));
static void ctl_putstr P((const char *, const char *, unsigned int));
static void ctl_putdbl P((const char *, double));
static void ctl_putuint P((const char *, u_long));
static void ctl_puthex P((const char *, u_long));
static void ctl_putint P((const char *, long));
static void ctl_putts P((const char *, l_fp *));
static void ctl_putadr P((const char *, u_int32));
static void ctl_putid P((const char *, char *));
static void ctl_putarray P((const char *, double *, int));
static void ctl_putsys P((int));
static void ctl_putpeer P((int, struct peer *));
#ifdef REFCLOCK
static void ctl_putclock P((int, struct refclockstat *, int));
#endif /* REFCLOCK */
static struct ctl_var *ctl_getitem P((struct ctl_var *, char **));
static u_long count_var P((struct ctl_var *));
static void control_unspec P((struct recvbuf *, int));
static void read_status P((struct recvbuf *, int));
static void read_variables P((struct recvbuf *, int));
static void write_variables P((struct recvbuf *, int));
static void read_clock_status P((struct recvbuf *, int));
static void write_clock_status P((struct recvbuf *, int));
static void set_trap P((struct recvbuf *, int));
static void unset_trap P((struct recvbuf *, int));
static struct ctl_trap *ctlfindtrap P((struct sockaddr_in *, struct interface *));
static 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_clock_status },
{ CTL_OP_WRITECLOCK, NOAUTH, write_clock_status },
{ CTL_OP_SETTRAP, NOAUTH, set_trap },
{ CTL_OP_UNSETTRAP, NOAUTH, unset_trap },
{ NO_REQUEST, 0 }
};
/*
* System variable values. The array can be indexed by
* the variable index to find the textual name.
*/
static 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, "rootdispersion" }, /* 5 */
{ CS_REFID, RO, "refid" }, /* 6 */
{ CS_REFTIME, RO, "reftime" }, /* 7 */
{ CS_POLL, RO, "poll" }, /* 8 */
{ CS_PEERID, RO, "peer" }, /* 9 */
{ CS_STATE, RO, "state" }, /* 10 */
{ CS_OFFSET, RO, "phase" }, /* 11 */
{ CS_DRIFT, RO, "frequency" }, /* 12 */
{ CS_COMPLIANCE, RO, "jitter" }, /* 13 */
{ CS_CLOCK, RO, "clock" }, /* 14 */
{ CS_PROCESSOR, RO, "processor" }, /* 15 */
{ CS_SYSTEM, RO, "system" }, /* 16 */
{ CS_STABIL, RO, "stability" }, /* 17 */
{ CS_VARLIST, RO, "sys_var_list" }, /* 18 */
{ 0, EOV, "" }
};
static struct ctl_var *ext_sys_var = (struct ctl_var *)0;
/*
* System variables we print by default (in fuzzball order, more-or-less)
*/
static u_char def_sys_var[] = {
CS_PROCESSOR,
CS_SYSTEM,
CS_LEAP,
CS_STRATUM,
CS_PRECISION,
CS_ROOTDELAY,
CS_ROOTDISPERSION,
CS_PEERID,
CS_REFID,
CS_REFTIME,
CS_POLL,
CS_CLOCK,
CS_STATE,
CS_OFFSET,
CS_DRIFT,
CS_COMPLIANCE,
CS_STABIL,
0
};
/*
* Peer variable list
*/
static 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, "rootdispersion" }, /* 15 */
{ CP_REFID, RO, "refid" }, /* 16 */
{ CP_REFTIME, RO, "reftime" }, /* 17 */
{ CP_ORG, RO, "org" }, /* 18 */
{ CP_REC, RO, "rec" }, /* 19 */
{ CP_XMT, RO, "xmt" }, /* 20 */
{ CP_REACH, RO, "reach" }, /* 21 */
{ CP_VALID, RO, "valid" }, /* 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_DISP, PADDING,"" }, /* 36 */
{ CP_VARLIST, RO, "peer_var_list" }, /* 37 */
{ 0, EOV, "" }
};
/*
* Peer variables we print by default
*/
static u_char def_peer_var[] = {
CP_SRCADR,
CP_SRCPORT,
CP_DSTADR,
CP_DSTPORT,
CP_KEYID,
CP_STRATUM,
CP_PRECISION,
CP_ROOTDELAY,
CP_ROOTDISPERSION,
CP_REFID,
CP_REFTIME,
CP_DELAY,
CP_OFFSET,
CP_JITTER,
CP_DISPERSION,
CP_REACH,
CP_VALID,
CP_HMODE,
CP_PMODE,
CP_HPOLL,
CP_PPOLL,
CP_LEAP,
CP_FLASH,
CP_ORG,
CP_REC,
CP_XMT,
CP_FILTDELAY,
CP_FILTOFFSET,
CP_FILTERROR,
0
};
#ifdef REFCLOCK
/*
* Clock variable list
*/
static 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 */
{ 0, EOV, "" }
};
/*
* Clock variables printed by default
*/
static 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_FUDGETIME1,
CC_FUDGETIME2,
CC_FUDGEVAL1,
CC_FUDGEVAL2,
CC_FLAGS,
0
};
#endif
/*
* System and processor definitions. These will change for the gizmo board.
*/
#ifndef HAVE_UNAME
# ifndef STR_SYSTEM
# define STR_SYSTEM "UNIX"
# endif
# ifndef STR_PROCESSOR
# define STR_PROCESSOR "unknown"
# endif
static char str_system[] = STR_SYSTEM;
static char str_processor[] = STR_PROCESSOR;
#else
# include <sys/utsname.h>
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_trap[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.
*/
static u_char clocktypes[] = {
CTL_SST_TS_NTP, /* REFCLK_NONE (0) */
CTL_SST_TS_LOCAL, /* REFCLK_LOCALCLOCK (1) */
CTL_SST_TS_UHF, /* 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_GOES_TRAK (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, /* REFCLK_MSF_EES (14) */
CTL_SST_TS_UHF, /* REFCLK_TRUETIME (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_TELEPHONE, /* REFCLK_PTB_ACTS (23) */
CTL_SST_TS_TELEPHONE, /* REFCLK_USNO (24) */
CTL_SST_TS_UHF, /* REFCLK_TRUETIME (25) */
CTL_SST_TS_UHF, /* REFCLK_GPS_HP (26) */
CTL_SST_TS_TELEPHONE, /* REFCLK_ARCRON_MSF (27) */
CTL_SST_TS_TELEPHONE, /* 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 (32) */
CTL_SST_TS_LF, /* REFCLK_ULINK (33) */
Virgin import of ntpd 4.0.99b
2000-01-28 14:55:50 +00:00
CTL_SST_TS_LF, /* REFCLK_PCF (35) */
CTL_SST_TS_LF, /* REFCLK_WWW (36) */
CTL_SST_TS_LF, /* REFCLK_FG (37) */
Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
};
/*
* Keyid used for authenticating write requests.
*/
u_long 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 u_short res_associd;
static int res_offset;
static u_char * datapt;
static u_char * dataend;
static int datalinelen;
static int datanotbinflag;
static struct sockaddr_in *rmt_addr;
static struct interface *lcl_inter;
static u_char res_authenticate;
static u_char res_authokay;
static u_long res_keyid;
#define MAXDATALINELEN (72)
static u_char res_async; /* set to 1 if this is 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)
{
int 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 < CTL_MAXTRAPS; i++)
ctl_trap[i].tr_flags = 0;
}
/*
* ctl_error - send an error response for the current request
*/
static void
ctl_error(
int errcode
)
{
#ifdef DEBUG
if (debug >= 4)
printf("sending control error %d\n", errcode);
#endif
/*
* 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) {
int maclen;
*(u_int32 *)((u_char *)&rpkt + CTL_HEADER_LEN)
= htonl(res_keyid);
maclen = authencrypt(res_keyid, (u_int32 *)&rpkt,
CTL_HEADER_LEN);
sendpkt(rmt_addr, lcl_inter, -2, (struct pkt *)&rpkt,
CTL_HEADER_LEN + maclen);
} else {
sendpkt(rmt_addr, lcl_inter, -3, (struct pkt *)&rpkt,
CTL_HEADER_LEN);
}
numctlerrors++;
}
/*
* process_control - process an incoming control message
*/
void
process_control(
struct recvbuf *rbufp,
int restrict_mask
)
{
register struct ntp_control *pkt;
register int req_count;
register int req_data;
register struct ctl_proc *cc;
int properlen;
int maclen;
#ifdef DEBUG
if (debug > 1)
printf("in process_control()\n");
#endif
/*
* 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, or
* it is a response or a fragment, ignore this.
*/
if (rbufp->recv_length < CTL_HEADER_LEN
|| pkt->r_m_e_op & (CTL_RESPONSE|CTL_MORE|CTL_ERROR)
|| pkt->offset != 0) {
#ifdef DEBUG
if (debug)
printf("invalid format in control packet\n");
#endif
if (rbufp->recv_length < CTL_HEADER_LEN)
numctltooshort++;
if (pkt->r_m_e_op & CTL_RESPONSE)
numctlinputresp++;
if (pkt->r_m_e_op & CTL_MORE)
numctlinputfrag++;
if (pkt->r_m_e_op & CTL_ERROR)
numctlinputerr++;
if (pkt->offset != 0)
numctlbadoffset++;
return;
}
res_version = PKT_VERSION(pkt->li_vn_mode);
if (res_version > NTP_VERSION || res_version < NTP_OLDVERSION) {
#ifdef DEBUG
if (debug)
printf("unknown version %d in control packet\n",
res_version);
#endif
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_offset = 0;
res_associd = htons(pkt->associd);
res_async = 0;
res_authenticate = 0;
res_keyid = 0;
res_authokay = 0;
req_count = (int)htons(pkt->count);
datanotbinflag = 0;
datalinelen = 0;
datapt = rpkt.data;
dataend = &(rpkt.data[CTL_MAX_DATA_LEN]);
/*
* 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;
#ifdef DEBUG
if (debug >= 2 && (rbufp->recv_length & 0x3) != 0)
printf("Packet length %d unrounded\n", rbufp->recv_length);
#endif
/* round up proper len to a 8 octet boundary */
properlen = (properlen + 7) & ~7;
maclen = rbufp->recv_length - properlen;
if ((rbufp->recv_length & (sizeof(u_long) - 1)) == 0 &&
maclen >= MIN_MAC_LEN && maclen <= MAX_MAC_LEN &&
sys_authenticate) {
res_authenticate = 1;
res_keyid = ntohl(*(u_int32 *)((u_char *)pkt + properlen));
#ifdef DEBUG
if (debug >= 3)
printf(
"recv_len %d, properlen %d, wants auth with keyid %ld, MAC length=%d\n",
rbufp->recv_length, properlen, res_keyid, maclen);
#endif
if (!authistrusted(res_keyid)) {
#ifdef DEBUG
if (debug >= 2)
printf("invalid keyid %lu\n", res_keyid);
#endif
} else if (authdecrypt(res_keyid, (u_int32 *)pkt,
rbufp->recv_length - maclen, maclen)) {
#ifdef DEBUG
if (debug >= 3)
printf("authenticated okay\n");
#endif
res_authokay = 1;
} else {
#ifdef DEBUG
if (debug >= 3)
printf("authentication failed\n");
#endif
res_keyid = 0;
}
}
/*
* Set up translate pointers
*/
reqpt = (char *)pkt->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) {
#ifdef DEBUG
if (debug >= 2)
printf("opcode %d, found command handler\n",
res_opcode);
#endif
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 *peer
)
{
register u_short status;
status = peer->status;
if (peer->flags & FLAG_CONFIG)
status |= CTL_PST_CONFIG;
if (peer->flags & FLAG_AUTHENABLE)
status |= CTL_PST_AUTHENABLE;
if (peer->flags & FLAG_AUTHENTIC)
status |= CTL_PST_AUTHENTIC;
if (peer->reach != 0)
status |= CTL_PST_REACH;
return (u_short)CTL_PEER_STATUS(status, peer->num_events,
peer->last_event);
}
/*
* ctlclkstatus - return a status word for this clock
*/
static u_short
ctlclkstatus(
struct refclockstat *this_clock
)
{
return ((u_short)(this_clock->currentstatus) << 8)
| (u_short)(this_clock->lastevent);
}
/*
* ctlsysstatus - return the system status word
*/
u_short
ctlsysstatus(void)
{
register u_char this_clock;
this_clock = CTL_SST_TS_UNSPEC;
if (sys_peer != 0) {
if (sys_peer->sstclktype != CTL_SST_TS_UNSPEC) {
this_clock = sys_peer->sstclktype;
if (pps_control)
this_clock |= CTL_SST_TS_PPS;
} else {
if (sys_peer->refclktype < sizeof(clocktypes))
this_clock = clocktypes[sys_peer->refclktype];
if (pps_control)
this_clock |= CTL_SST_TS_PPS;
}
}
return (u_short)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(
int more
)
{
int dlen;
int sendlen;
if (!more && datanotbinflag) {
/*
* Big hack, output a trailing \r\n
*/
*datapt++ = '\r';
*datapt++ = '\n';
}
dlen = datapt - (u_char *)rpkt.data;
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 = (u_char)(CTL_RESPONSE|more|(res_opcode & CTL_OP_MASK));
rpkt.count = htons((u_short) dlen);
rpkt.offset = htons( (u_short) res_offset);
if (res_async) {
register int i;
for (i = 0; i < CTL_MAXTRAPS; i++) {
if (ctl_trap[i].tr_flags & TRAP_INUSE) {
rpkt.li_vn_mode = PKT_LI_VN_MODE(sys_leap,
ctl_trap[i].tr_version, MODE_CONTROL);
rpkt.sequence = htons(ctl_trap[i].tr_sequence);
sendpkt(&ctl_trap[i].tr_addr,
ctl_trap[i].tr_localaddr,
-4,
(struct pkt *)&rpkt, sendlen);
if (!more)
ctl_trap[i].tr_sequence++;
numasyncmsgs++;
}
}
} else {
if (res_authenticate && sys_authenticate) {
int maclen;
int totlen = sendlen;
u_long keyid = htonl(res_keyid);
/*
* 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++;
}
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_offset += dlen;
datapt = (u_char *)rpkt.data;
}
/*
* 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 */
)
{
int overhead;
overhead = 0;
if (!bin) {
datanotbinflag = 1;
overhead = 3;
if (datapt != rpkt.data) {
*datapt++ = ',';
datalinelen++;
if ((dlen + datalinelen + 1) >= MAXDATALINELEN) {
*datapt++ = '\r';
*datapt++ = '\n';
datalinelen = 0;
} else {
*datapt++ = ' ';
datalinelen++;
}
}
}
/*
* Save room for trailing junk
*/
if (dlen + overhead + datapt > dataend) {
/*
* Not enough room in this one, flush it out.
*/
ctl_flushpkt(CTL_MORE);
}
memmove((char *)datapt, dp, (unsigned)dlen);
datapt += dlen;
datalinelen += dlen;
}
/*
* ctl_putstr - write a tagged string into the response packet
*/
static void
ctl_putstr(
const char *tag,
const char *data,
unsigned int len
)
{
register char *cp;
register const char *cq;
char buffer[400];
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
if (len > 0) {
*cp++ = '=';
*cp++ = '"';
if (len > (int) (sizeof(buffer) - (cp - buffer) - 1))
len = sizeof(buffer) - (cp - buffer) - 1;
memmove(cp, data, (unsigned)len);
cp += len;
*cp++ = '"';
}
ctl_putdata(buffer, (unsigned)( cp - buffer ), 0);
}
/*
* ctl_putdbl - write a tagged, signed double into the response packet
*/
static void
ctl_putdbl(
const char *tag,
double ts
)
{
register char *cp;
register const char *cq;
char buffer[200];
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
*cp++ = '=';
(void)sprintf(cp, "%.3f", ts);
while (*cp != '\0')
cp++;
ctl_putdata(buffer, (unsigned)( cp - buffer ), 0);
}
/*
* ctl_putuint - write a tagged unsigned integer into the response
*/
static void
ctl_putuint(
const char *tag,
u_long uval
)
{
register char *cp;
register const char *cq;
char buffer[200];
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
*cp++ = '=';
(void) sprintf(cp, "%lu", uval);
while (*cp != '\0')
cp++;
ctl_putdata(buffer, (unsigned)( cp - buffer ), 0);
}
/*
* ctl_puthex - write a tagged unsigned integer, in hex, into the response
*/
static void
ctl_puthex(
const char *tag,
u_long uval
)
{
register char *cp;
register const char *cq;
char buffer[200];
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
*cp++ = '=';
(void) sprintf(cp, "0x%lx", uval);
while (*cp != '\0')
cp++;
ctl_putdata(buffer,(unsigned)( cp - buffer ), 0);
}
/*
* ctl_putint - write a tagged signed integer into the response
*/
static void
ctl_putint(
const char *tag,
long ival
)
{
register char *cp;
register const char *cq;
char buffer[200];
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
*cp++ = '=';
(void) sprintf(cp, "%ld", ival);
while (*cp != '\0')
cp++;
ctl_putdata(buffer, (unsigned)( cp - buffer ), 0);
}
/*
* ctl_putts - write a tagged timestamp, in hex, into the response
*/
static void
ctl_putts(
const char *tag,
l_fp *ts
)
{
register char *cp;
register const char *cq;
char buffer[200];
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
*cp++ = '=';
(void) sprintf(cp, "0x%08lx.%08lx", ts->l_ui & 0xffffffffL,
ts->l_uf & 0xffffffffL);
while (*cp != '\0')
cp++;
ctl_putdata(buffer, (unsigned)( cp - buffer ), 0);
}
/*
* ctl_putadr - write a dotted quad IP address into the response
*/
static void
ctl_putadr(
const char *tag,
u_int32 addr
)
{
register char *cp;
register const char *cq;
char buffer[200];
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
*cp++ = '=';
cq = numtoa(addr);
while (*cq != '\0')
*cp++ = *cq++;
ctl_putdata(buffer, (unsigned)( cp - buffer ), 0);
}
/*
* ctl_putid - write a tagged clock ID into the response
*/
static void
ctl_putid(
const char *tag,
char *id
)
{
register char *cp;
register const char *cq;
char buffer[200];
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
*cp++ = '=';
cq = id;
while (*cq != '\0' && (cq - id) < 4)
*cp++ = *cq++;
ctl_putdata(buffer, (unsigned)( cp - buffer ), 0);
}
/*
* ctl_putarray - write a tagged eight element double array into the response
*/
static void
ctl_putarray(
const char *tag,
double *arr,
int start
)
{
register char *cp;
register const char *cq;
char buffer[200];
int i;
cp = buffer;
cq = tag;
while (*cq != '\0')
*cp++ = *cq++;
i = start;
do {
if (i == 0)
i = NTP_SHIFT;
i--;
(void)sprintf(cp, " %.2f", arr[i] * 1e3);
while (*cp != '\0')
cp++;
} while(i != start);
ctl_putdata(buffer, (unsigned)(cp - buffer), 0);
}
/*
* ctl_putsys - output a system variable
*/
static void
ctl_putsys(
int varid
)
{
l_fp tmp;
#ifdef HAVE_UNAME
char str[50];
#endif
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_rootdispersion * 1e3);
break;
case CS_REFID:
if (sys_stratum > 1)
ctl_putadr(sys_var[CS_REFID].text, sys_refid);
else
ctl_putid(sys_var[CS_REFID].text, (char *)&sys_refid);
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_STATE:
ctl_putuint(sys_var[CS_STATE].text, (unsigned)state);
break;
case CS_OFFSET:
ctl_putdbl(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_COMPLIANCE:
ctl_putdbl(sys_var[CS_COMPLIANCE].text, sys_error * 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
(void)strcpy(str, utsnamebuf.sysname);
(void)strcat(str, utsnamebuf.release);
ctl_putstr(sys_var[CS_SYSTEM].text, str, strlen(str));
#endif /* HAVE_UNAME */
break;
case CS_STABIL:
ctl_putdbl(sys_var[CS_STABIL].text, clock_stability * 1e6);
break;
case CS_VARLIST:
{
char buf[CTL_MAX_DATA_LEN];
register char *s, *t, *be;
register const char *ss;
register int i;
register struct ctl_var *k;
s = buf;
be = buf + sizeof(buf) - strlen(sys_var[CS_VARLIST].text) - 4;
if (s > be)
break; /* really long var name 8-( - Killer */
strcpy(s, sys_var[CS_VARLIST].text);
strcat(s, "=\"");
s += strlen(s);
t = s;
for (k = sys_var; !(k->flags &EOV); k++)
{
if (k->flags & PADDING)
continue;
i = strlen(k->text);
if (s+i+1 >= be)
break;
if (s != t)
*s++ = ',';
strcpy(s, k->text);
s += i;
}
for (k = ext_sys_var; k && !(k->flags &EOV); k++)
{
if (k->flags & PADDING)
continue;
ss = k->text;
if (!ss)
continue;
while (*ss && *ss != '=')
ss++;
i = ss - k->text;
if (s+i+1 >= be)
break;
if (s != t)
*s++ = ',';
strncpy(s, k->text, (unsigned)i);
s += i;
}
if (s+2 >= be)
break;
*s++ = '"';
*s = '\0';
ctl_putdata(buf, (unsigned)( s - buf ), 0);
}
break;
}
}
/*
* ctl_putpeer - output a peer variable
*/
static void
ctl_putpeer(
int varid,
struct peer *peer
)
{
switch (varid) {
case CP_CONFIG:
ctl_putuint(peer_var[CP_CONFIG].text,
(unsigned)((peer->flags & FLAG_CONFIG) != 0));
break;
case CP_AUTHENABLE:
ctl_putuint(peer_var[CP_AUTHENABLE].text,
(unsigned)((peer->flags & FLAG_AUTHENABLE) != 0));
break;
case CP_AUTHENTIC:
ctl_putuint(peer_var[CP_AUTHENTIC].text,
(unsigned)((peer->flags & FLAG_AUTHENTIC) != 0));
break;
case CP_SRCADR:
ctl_putadr(peer_var[CP_SRCADR].text,
peer->srcadr.sin_addr.s_addr);
break;
case CP_SRCPORT:
ctl_putuint(peer_var[CP_SRCPORT].text,
ntohs(peer->srcadr.sin_port));
break;
case CP_DSTADR:
ctl_putadr(peer_var[CP_DSTADR].text,
peer->processed ?
peer->cast_flags & MDF_BCAST ?
peer->dstadr->bcast.sin_addr.s_addr:
peer->cast_flags ?
peer->dstadr->sin.sin_addr.s_addr ?
peer->dstadr->sin.sin_addr.s_addr:
peer->dstadr->bcast.sin_addr.s_addr:
8 : 12);
break;
case CP_DSTPORT:
ctl_putuint(peer_var[CP_DSTPORT].text,
(u_long)(peer->dstadr
? ntohs(peer->dstadr->sin.sin_port)
: 0
)
);
break;
case CP_LEAP:
ctl_putuint(peer_var[CP_LEAP].text, peer->leap);
break;
case CP_HMODE:
ctl_putuint(peer_var[CP_HMODE].text, peer->hmode);
break;
case CP_STRATUM:
ctl_putuint(peer_var[CP_STRATUM].text, peer->stratum);
break;
case CP_PPOLL:
ctl_putuint(peer_var[CP_PPOLL].text, peer->ppoll);
break;
case CP_HPOLL:
ctl_putuint(peer_var[CP_HPOLL].text, peer->hpoll);
break;
case CP_PRECISION:
ctl_putint(peer_var[CP_PRECISION].text, peer->precision);
break;
case CP_ROOTDELAY:
ctl_putdbl(peer_var[CP_ROOTDELAY].text, peer->rootdelay * 1e3);
break;
case CP_ROOTDISPERSION:
ctl_putdbl(peer_var[CP_ROOTDISPERSION].text,
peer->rootdispersion * 1e3);
break;
case CP_REFID:
if (peer->stratum > 1)
{
if (peer->flags & FLAG_REFCLOCK)
ctl_putadr(peer_var[CP_REFID].text,
peer->srcadr.sin_addr.s_addr);
else
ctl_putadr(peer_var[CP_REFID].text,
peer->refid);
}
else
ctl_putid(peer_var[CP_REFID].text,
(char *)&peer->refid);
break;
case CP_REFTIME:
ctl_putts(peer_var[CP_REFTIME].text, &peer->reftime);
break;
case CP_ORG:
ctl_putts(peer_var[CP_ORG].text, &peer->org);
break;
case CP_REC:
ctl_putts(peer_var[CP_REC].text, &peer->rec);
break;
case CP_XMT:
ctl_putts(peer_var[CP_XMT].text, &peer->xmt);
break;
case CP_REACH:
ctl_puthex(peer_var[CP_REACH].text, peer->reach);
break;
case CP_FLASH:
ctl_puthex(peer_var[CP_FLASH].text, peer->flash);
break;
case CP_VALID:
ctl_putuint(peer_var[CP_VALID].text, peer->valid);
break;
case CP_TIMER:
ctl_putuint(peer_var[CP_TIMER].text,
peer->nextdate - current_time);
break;
case CP_DELAY:
ctl_putdbl(peer_var[CP_DELAY].text, peer->delay * 1e3);
break;
case CP_OFFSET:
ctl_putdbl(peer_var[CP_OFFSET].text, peer->offset * 1e3);
break;
case CP_JITTER:
ctl_putdbl(peer_var[CP_JITTER].text,
SQRT(peer->variance) * 1e3);
break;
case CP_DISPERSION:
ctl_putdbl(peer_var[CP_DISPERSION].text, peer->disp * 1e3);
break;
case CP_KEYID:
ctl_putuint(peer_var[CP_KEYID].text, peer->keyid);
break;
case CP_FILTDELAY:
ctl_putarray(peer_var[CP_FILTDELAY].text,
peer->filter_delay, (int)peer->filter_nextpt);
break;
case CP_FILTOFFSET:
ctl_putarray(peer_var[CP_FILTOFFSET].text,
peer->filter_offset, (int)peer->filter_nextpt);
break;
case CP_FILTERROR:
ctl_putarray(peer_var[CP_FILTERROR].text,
peer->filter_disp, (int)peer->filter_nextpt);
break;
case CP_PMODE:
ctl_putuint(peer_var[CP_PMODE].text, peer->pmode);
break;
case CP_RECEIVED:
ctl_putuint(peer_var[CP_RECEIVED].text, peer->received);
break;
case CP_SENT:
ctl_putuint(peer_var[CP_SENT].text, peer->sent);
break;
case CP_VARLIST:
{
char buf[CTL_MAX_DATA_LEN];
register char *s, *t, *be;
register int i;
register struct ctl_var *k;
s = buf;
be = buf + sizeof(buf) - strlen(peer_var[CP_VARLIST].text) - 4;
if (s > be)
break; /* really long var name 8-( - Killer */
strcpy(s, peer_var[CP_VARLIST].text);
strcat(s, "=\"");
s += strlen(s);
t = s;
for (k = peer_var; !(k->flags &EOV); k++)
{
if (k->flags & PADDING)
continue;
i = strlen(k->text);
if (s+i+1 >= be)
break;
if (s != t)
*s++ = ',';
strcpy(s, k->text);
s += i;
}
if (s+2 >= be)
break;
*s++ = '"';
*s = '\0';
ctl_putdata(buf, (unsigned)(s - buf), 0);
}
break;
}
}
#ifdef REFCLOCK
/*
* ctl_putclock - output clock variables
*/
static void
ctl_putclock(
int varid,
struct refclockstat *clock_stat,
int mustput
)
{
switch(varid) {
case CC_TYPE:
if (mustput || clock_stat->clockdesc == NULL
|| *(clock_stat->clockdesc) == '\0') {
ctl_putuint(clock_var[CC_TYPE].text, clock_stat->type);
}
break;
case CC_TIMECODE:
ctl_putstr(clock_var[CC_TIMECODE].text, clock_stat->p_lastcode,
(unsigned)clock_stat->lencode);
break;
case CC_POLL:
ctl_putuint(clock_var[CC_POLL].text, clock_stat->polls);
break;
case CC_NOREPLY:
ctl_putuint(clock_var[CC_NOREPLY].text, clock_stat->noresponse);
break;
case CC_BADFORMAT:
ctl_putuint(clock_var[CC_BADFORMAT].text, clock_stat->badformat);
break;
case CC_BADDATA:
ctl_putuint(clock_var[CC_BADDATA].text, clock_stat->baddata);
break;
case CC_FUDGETIME1:
if (mustput || (clock_stat->haveflags & CLK_HAVETIME1)) {
ctl_putdbl(clock_var[CC_FUDGETIME1].text,
clock_stat->fudgetime1 * 1e3);
}
break;
case CC_FUDGETIME2:
if (mustput || (clock_stat->haveflags & CLK_HAVETIME2)) {
ctl_putdbl(clock_var[CC_FUDGETIME2].text,
clock_stat->fudgetime2 * 1e3);
}
break;
case CC_FUDGEVAL1:
if (mustput || (clock_stat->haveflags & CLK_HAVEVAL1))
ctl_putint(clock_var[CC_FUDGEVAL1].text,
clock_stat->fudgeval1);
break;
case CC_FUDGEVAL2:
if (mustput || (clock_stat->haveflags & CLK_HAVEVAL2)) {
if (clock_stat->fudgeval1 > 1)
ctl_putadr(clock_var[CC_FUDGEVAL2].text,
(u_int32)clock_stat->fudgeval2);
else
ctl_putid(clock_var[CC_FUDGEVAL2].text,
(char *)&clock_stat->fudgeval2);
}
break;
case CC_FLAGS:
if (mustput || (clock_stat->haveflags &
(CLK_HAVEFLAG1|CLK_HAVEFLAG2|CLK_HAVEFLAG3|CLK_HAVEFLAG4)))
ctl_putuint(clock_var[CC_FLAGS].text, clock_stat->flags);
break;
case CC_DEVICE:
if (clock_stat->clockdesc == NULL || *(clock_stat->clockdesc) == '\0') {
if (mustput)
ctl_putstr(clock_var[CC_DEVICE].text, "", 0);
} else {
ctl_putstr(clock_var[CC_DEVICE].text, clock_stat->clockdesc,
strlen(clock_stat->clockdesc));
}
break;
case CC_VARLIST:
{
char buf[CTL_MAX_DATA_LEN];
register char *s, *t, *be;
register const char *ss;
register int i;
register struct ctl_var *k;
s = buf;
be = buf + sizeof(buf);
if (s + strlen(clock_var[CC_VARLIST].text) + 4 > be)
break; /* really long var name 8-( - Killer */
strcpy(s, clock_var[CC_VARLIST].text);
strcat(s, "=\"");
s += strlen(s);
t = s;
for (k = clock_var; !(k->flags &EOV); k++)
{
if (k->flags & PADDING)
continue;
i = strlen(k->text);
if (s+i+1 >= be)
break;
if (s != t)
*s++ = ',';
strcpy(s, k->text);
s += i;
}
for (k = clock_stat->kv_list; k && !(k->flags &EOV); k++)
{
if (k->flags & PADDING)
continue;
ss = k->text;
if (!ss)
continue;
while (*ss && *ss != '=')
ss++;
i = ss - k->text;
if (s+i+1 >= be)
break;
if (s != t)
*s++ = ',';
strncpy(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;
}
}
#endif
/*
* ctl_getitem - get the next data item from the incoming packet
*/
static struct ctl_var *
ctl_getitem(
struct ctl_var *var_list,
char **data
)
{
register struct ctl_var *v;
register char *cp;
register char *tp;
static struct ctl_var eol = { 0, EOV, };
static char buf[128];
/*
* Delete leading commas and white space
*/
- Correct off-by-one error and buffer underflow from previous fix - int -> unsigned char fixes Submitted by: ache, dillon, Mark Andrews, et.al. (on -security)
2001-04-06 14:15:38 +00:00
while (reqpt < reqend && (*reqpt == ',' || isspace((unsigned char)*reqpt))) {
Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
reqpt++;
}
if (reqpt >= reqend)
return 0;
if (var_list == (struct ctl_var *)0)
return &eol;
/*
* Look for a first character match on the tag. If we find
* one, see if it is a full match.
*/
v = var_list;
cp = reqpt;
while (!(v->flags & EOV)) {
if (!(v->flags & PADDING) && *cp == *(v->text)) {
tp = v->text;
while (*tp != '\0' && *tp != '=' && cp < reqend && *cp == *tp) {
cp++;
tp++;
}
if ((*tp == '\0') || (*tp == '=')) {
- Correct off-by-one error and buffer underflow from previous fix - int -> unsigned char fixes Submitted by: ache, dillon, Mark Andrews, et.al. (on -security)
2001-04-06 14:15:38 +00:00
while (cp < reqend && isspace((unsigned char)*cp))
Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
cp++;
if (cp == reqend || *cp == ',') {
buf[0] = '\0';
*data = buf;
if (cp < reqend)
cp++;
reqpt = cp;
return v;
}
if (*cp == '=') {
cp++;
tp = buf;
- Correct off-by-one error and buffer underflow from previous fix - int -> unsigned char fixes Submitted by: ache, dillon, Mark Andrews, et.al. (on -security)
2001-04-06 14:15:38 +00:00
while (cp < reqend && isspace((unsigned char)*cp))
Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
cp++;
Fix a potential ROOT-exploit in NTPD. PR: 26358 Reviewed by: dima
2001-04-04 23:07:22 +00:00
while (cp < reqend && *cp != ',') {
Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
*tp++ = *cp++;
Do not log every potential exploit attempt since a denial-of-service may result.
2001-04-06 14:34:15 +00:00
if (tp >= buf + sizeof(buf))
Fix a potential ROOT-exploit in NTPD. PR: 26358 Reviewed by: dima
2001-04-04 23:07:22 +00:00
return (0);
}
Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
if (cp < reqend)
cp++;
*tp = '\0';
- Correct off-by-one error and buffer underflow from previous fix - int -> unsigned char fixes Submitted by: ache, dillon, Mark Andrews, et.al. (on -security)
2001-04-06 14:15:38 +00:00
while (tp != buf && isspace((unsigned char)(*(tp-1))))
Virgin import of ntpd 4.0.98f
1999-12-09 13:01:21 +00:00
*(--tp) = '\0';
reqpt = cp;
*data = buf;
return v;
}
}
cp = reqpt;
}
v++;
}
return v;
}
/*
* 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 != 0) {
if ((peer = findpeerbyassoc((int)res_associd)) == 0) {
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
)
{
register int i;
register struct peer *peer;
u_short ass_stat[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 == 0) {
register int n;
n = 0;
rpkt.status = htons(ctlsysstatus());
for (i = 0; i < HASH_SIZE; i++) {
for (peer = assoc_hash[i]; peer != 0;
peer = peer->ass_next) {
ass_stat[n++] = htons(peer->associd);
ass_stat[n++] = htons(ctlpeerstatus(peer));
if (n == CTL_MAX_DATA_LEN/sizeof(u_short)) {
ctl_putdata((char *)ass_stat,
n * sizeof(u_short), 1);
n = 0;
}
}
}
if (n != 0)
ctl_putdata((char *)ass_stat, n * sizeof(u_short), 1);
ctl_flushpkt(0);
} else {
peer = findpeerbyassoc((int)res_associd);
if (peer == 0) {
ctl_error(CERR_BADASSOC);
} else {
register u_char *cp;
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);
}
}
}
/*
* read_variables - return the variables the caller asks for
*/
/*ARGSUSED*/
static void
read_variables(
struct recvbuf *rbufp,
int restrict_mask
)
{
register struct ctl_var *v;
register int i;
char *valuep;
u_char *wants;
unsigned int gotvar = (CS_MAXCODE>CP_MAXCODE) ? (CS_MAXCODE+1) : (CP_MAXCODE+1);
if (res_associd == 0) {
/*
* 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;
gotvar += count_var(ext_sys_var);
wants = (u_char *)emalloc(gotvar);
memset((char *)wants, 0, gotvar);
gotvar = 0;
while ((v = ctl_getitem(sys_var, &valuep)) != 0) {
if (v->flags & EOV) {
if ((v = ctl_getitem(ext_sys_var, &valuep)) != 0) {
if (v->flags & EOV) {
ctl_error(CERR_UNKNOWNVAR);
free((char *)wants);
return;
}
wants[CS_MAXCODE+1+v->code] = 1;
gotvar = 1;
continue;
} else {
break; /* shouldn't happen ! */
}
}
wants[v->code] = 1;
gotvar = 1;
}
if (gotvar) {
for (i = 1; i <= CS_MAXCODE; i++)
if (wants[i])
ctl_putsys(i);
for (i = 0; ext_sys_var && !(ext_sys_var[i].flags & EOV); i++)
if (wants[i+CS_MAXCODE+1])
ctl_putdata(ext_sys_var[i].text,
strlen(ext_sys_var[i].text), 0);
} else {
register u_char *cs;
register struct ctl_var *kv;
for (cs = def_sys_var; *cs != 0; cs++)
ctl_putsys((int)*cs);
for (kv = ext_sys_var; kv && !(kv->flags & EOV); kv++)
if (kv->flags & DEF)
ctl_putdata(kv->text, strlen(kv->text), 0);
}
free((char *)wants);
} else {
register struct peer *peer;
/*
* Wants info for a particular peer. See if we know
* the guy.
*/
peer = findpeerbyassoc((int)res_associd);
if (peer == 0) {
ctl_error(CERR_BADASSOC);
return;
}
rpkt.status = htons(ctlpeerstatus(peer));
if (res_authokay)
peer->num_events = 0;
wants = (u_char *)emalloc(gotvar);
memset((char*)wants, 0, gotvar);
gotvar = 0;
while ((v = ctl_getitem(peer_var, &valuep)) != 0) {
if (v->flags & EOV) {
ctl_error(CERR_UNKNOWNVAR);
free((char *)wants);
return;
}
wants[v->code] = 1;
gotvar = 1;
}
if (gotvar) {
for (i = 1; i <= CP_MAXCODE; i++)
if (wants[i])
ctl_putpeer(i, peer);
} else {
register u_char *cp;
for (cp = def_peer_var; *cp != 0; cp++)
ctl_putpeer((int)*cp, peer);
}
free((char *)wants);
}
ctl_flushpkt(0);
}
/*
* write_variables - write into variables. We only allow leap bit writing
* this way.
*/
/*ARGSUSED*/
static void
write_variables(
struct recvbuf *rbufp,
int restrict_mask
)
{
register struct ctl_var *v;
register int ext_var;
char *valuep;
long val;
/*int leapind, leapwarn;*/
/*
* 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());
/*
* Set flags to not-in-sync so we can tell when we get something.
*/
/*
leapind = ~0;
leapwarn = ~0;
*/
/*
* Look through the variables. Dump out at the first sign of trouble.
*/
while ((v = ctl_getitem(sys_var, &valuep)) != 0) {
ext_var = 0;
if (v->flags & EOV) {
if ((v = ctl_getitem(ext_sys_var, &valuep)) != 0) {
if (v->flags & EOV) {
ctl_error(CERR_UNKNOWNVAR);
return;
}
ext_var = 1;
} else {
break;
}
}
if (!(v->flags & CAN_WRITE)) {
ctl_error(CERR_PERMISSION);
return;
}
if (!ext_var && (*valuep == '\0' || !atoint(valuep, &val))) {
ctl_error(CERR_BADFMT);
return;
}
if (!ext_var && (val & ~LEAP_NOTINSYNC) != 0) {
ctl_error(CERR_BADVALUE);
return;
}
if (ext_var) {
char *s = (char *)emalloc(strlen(v->text)+strlen(valuep)+2);
const char *t;
char *tt = s;
t = v->text;
while (*t && *t != '=')
*tt++ = *t++;
*tt++ = '=';
strcat(tt, valuep);
set_sys_var(s, strlen(s)+1, v->flags);
free(s);
} else {
/*
* This one seems sane. Save it.
*/
switch(v->code) {
case CS_LEAP:
default:
ctl_error(CERR_UNSPEC); /* our fault, really */
return;
}
}
}
/*
* If we got anything, do it.
*/
/*
if (leapind != ~0 || leapwarn != ~0) {
if (!leap_setleap((int)leapind, (int)leapwarn)) {
ctl_error(CERR_PERMISSION);
return;
}
}
*/
ctl_flushpkt(0);
}
/*
* read_clock_status - return clock radio status
*/
/*ARGSUSED*/
static void
read_clock_status(
struct recvbuf *rbufp,
int restrict_mask
)
{
#ifndef REFCLOCK
/*
* If no refclock support, no data to return
*/
ctl_error(CERR_BADASSOC);
#else
register struct ctl_var *v;
register int i;
register struct peer *peer;
char *valuep;
u_char *wants;
unsigned int gotvar;
struct refclockstat clock_stat;
if (res_associd == 0) {
/*
* Find a clock for this jerk. If the system peer
* is a clock use it, else search the hash tables
* for one.
*/
if (sys_peer != 0 && (sys_peer->flags & FLAG_REFCLOCK)) {
peer = sys_peer;
} else {
peer = 0;
for (i = 0; peer == 0 && i < HASH_SIZE; i++) {
for (peer = assoc_hash[i]; peer != 0;
peer = peer->ass_next) {
if (peer->flags & FLAG_REFCLOCK)
break;
}
}
if (peer == 0) {
ctl_error(CERR_BADASSOC);
return;
}
}
} else {
peer = findpeerbyassoc((int)res_associd);
if (peer == 0 || !(peer->flags & FLAG_REFCLOCK)) {
ctl_error(CERR_BADASSOC);
return;
}
}
/*
* If we got here we have a peer which is a clock. Get his status.
*/
clock_stat.kv_list = (struct ctl_var *)0;
refclock_control(&peer->srcadr, (struct refclockstat *)0, &clock_stat);
/*
* Look for variables in the packet.
*/
rpkt.status = htons(ctlclkstatus(&clock_stat));
gotvar = CC_MAXCODE+1+count_var(clock_stat.kv_list);
wants = (u_char *)emalloc(gotvar);
memset((char*)wants, 0, gotvar);
gotvar = 0;
while ((v = ctl_getitem(clock_var, &valuep)) != 0) {
if (v->flags & EOV) {
if ((v = ctl_getitem(clock_stat.kv_list, &valuep)) != 0) {
if (v->flags & EOV) {
ctl_error(CERR_UNKNOWNVAR);
free((char*)wants);
free_varlist(clock_stat.kv_list);
return;
}
wants[CC_MAXCODE+1+v->code] = 1;
gotvar = 1;
continue;
} else {
break; /* shouldn't happen ! */
}
}
wants[v->code] = 1;
gotvar = 1;
}
if (gotvar) {
for (i = 1; i <= CC_MAXCODE; i++)
if (wants[i])
ctl_putclock(i, &clock_stat, 1);
for (i = 0; clock_stat.kv_list && !(clock_stat.kv_list[i].flags & EOV); i++)
if (wants[i+CC_MAXCODE+1])
ctl_putdata(clock_stat.kv_list[i].text,
strlen(clock_stat.kv_list[i].text), 0);
} else {
register u_char *cc;
register struct ctl_var *kv;
for (cc = def_clock_var; *cc != 0; cc++)
ctl_putclock((int)*cc, &clock_stat, 0);
for (kv = clock_stat.kv_list; kv && !(kv->flags & EOV); kv++)
if (kv->flags & DEF)
ctl_putdata(kv->text, strlen(kv->text), 0);
}
free((char*)wants);
free_varlist(clock_stat.kv_list);
ctl_flushpkt(0);
#endif
}
/*
* write_clock_status - we don't do this
*/
/*ARGSUSED*/
static void
write_clock_status(
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(
struct sockaddr_in *raddr,
struct interface *linter,
int traptype,
int version
)
{
register struct ctl_trap *tp;
register 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 (tp = ctl_trap; tp < &ctl_trap[CTL_MAXTRAPS]; tp++) {
if ((tp->tr_flags & TRAP_INUSE) &&
!(tp->tr_flags & TRAP_CONFIGURED) &&
((tp->tr_settime + CTL_TRAPTIME) > current_time)) {
tp->tr_flags = 0;
num_ctl_traps--;
}
if (!(tp->tr_flags & TRAP_INUSE)) {
tptouse = tp;
} else if (!(tp->tr_flags & TRAP_CONFIGURED)) {
switch (traptype) {
case TRAP_TYPE_CONFIG:
if (tptouse == NULL) {
tptouse = tp;
break;
}
if (tptouse->tr_flags & TRAP_NONPRIO
&& !(tp->tr_flags & TRAP_NONPRIO))
break;
if (!(tptouse->tr_flags & TRAP_NONPRIO)
&& tp->tr_flags & TRAP_NONPRIO) {
tptouse = tp;
break;
}
if (tptouse->tr_origtime < tp->tr_origtime)
tptouse = tp;
break;
case TRAP_TYPE_PRIO:
if (tp->tr_flags & TRAP_NONPRIO) {
if (tptouse == NULL ||
(tptouse->tr_flags & TRAP_INUSE
&& 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 = 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 clr a trap
*/
int
ctlclrtrap(
struct sockaddr_in *raddr,
struct interface *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(
struct sockaddr_in *raddr,
struct interface *linter
)
{
register struct ctl_trap *tp;
for (tp = ctl_trap; tp < &ctl_trap[CTL_MAXTRAPS]; tp++) {
if (tp->tr_flags & TRAP_INUSE
&& NSRCADR(raddr) == NSRCADR(&tp->tr_addr)
&& NSRCPORT(raddr) == NSRCPORT(&tp->tr_addr)
&& linter == tp->tr_localaddr)
return tp;
}
return (struct ctl_trap *)NULL;
}
/*
* report_event - report an event to the trappers
*/
void
report_event(
int err,
struct peer *peer
)
{
register int i;
/*
* Record error code in proper spots, but have mercy on the
* log file.
*/
if (!(err & PEER_EVENT)) {
if (ctl_sys_num_events < CTL_SYS_MAXEVENTS)
ctl_sys_num_events++;
if (ctl_sys_last_event != (u_char)err) {
NLOG(NLOG_SYSEVENT)
msyslog(LOG_INFO, "system event '%s' (0x%02x) status '%s' (0x%02x)",
eventstr(err), err,
sysstatstr(ctlsysstatus()), ctlsysstatus());
#ifdef DEBUG
if (debug)
printf("report_event: system event '%s' (0x%02x) status '%s' (0x%02x)\n",
eventstr(err), err,
sysstatstr(ctlsysstatus()), ctlsysstatus());
#endif
ctl_sys_last_event = (u_char)err;
}
} else if (peer != 0) {
char *src;
#ifdef REFCLOCK
if (ISREFCLOCKADR(&peer->srcadr))
src = refnumtoa(peer->srcadr.sin_addr.s_addr);
else
#endif
src = ntoa(&peer->srcadr);
peer->last_event = (u_char)(err & ~PEER_EVENT);
if (peer->num_events < CTL_PEER_MAXEVENTS)
peer->num_events++;
NLOG(NLOG_PEEREVENT)
msyslog(LOG_INFO, "peer %s event '%s' (0x%02x) status '%s' (0x%02x)",
src, eventstr(err), err,
peerstatstr(ctlpeerstatus(peer)), ctlpeerstatus(peer));
#ifdef DEBUG
if (debug)
printf( "peer %s event '%s' (0x%02x) status '%s' (0x%02x)\n",
src, eventstr(err), err,
peerstatstr(ctlpeerstatus(peer)), ctlpeerstatus(peer));
#endif
} else {
msyslog(LOG_ERR, "report_event: err '%s' (0x%02x), no peer", eventstr(err), err);
#ifdef DEBUG
printf("report_event: peer event '%s' (0x%02x), no peer\n", eventstr(err), err);
#endif
return;
}
/*
* If no trappers, return.
*/
if (num_ctl_traps <= 0)
return;
/*
* Set up the outgoing packet variables
*/
res_opcode = CTL_OP_ASYNCMSG;
res_offset = 0;
res_async = 1;
res_authenticate = 0;
datapt = rpkt.data;
dataend = &(rpkt.data[CTL_MAX_DATA_LEN]);
if (!(err & PEER_EVENT)) {
rpkt.associd = 0;
rpkt.status = htons(ctlsysstatus());
/*
* For now, put everything we know about system
* variables. Maybe more selective later
*/
for (i = 1; i <= CS_MAXCODE; i++)
ctl_putsys(i);
#ifdef REFCLOCK
/*
* for clock exception events:
* add clock variables to reflect info on exception
*/
if (err == EVNT_CLOCKEXCPT) {
struct refclockstat clock_stat;
struct ctl_var *kv;
clock_stat.kv_list = (struct ctl_var *)0;
refclock_control(&peer->srcadr,
(struct refclockstat *)0, &clock_stat);
ctl_puthex("refclockstatus", ctlclkstatus(&clock_stat));
for (i = 1; i <= CC_MAXCODE; i++)
ctl_putclock(i, &clock_stat, 0);
for (kv = clock_stat.kv_list; kv && !(kv->flags & EOV); kv++)
if (kv->flags & DEF)
ctl_putdata(kv->text, strlen(kv->text), 0);
free_varlist(clock_stat.kv_list);
}
#endif /*REFCLOCK*/
} else {
rpkt.associd = htons(peer->associd);
rpkt.status = htons(ctlpeerstatus(peer));
/*
* Dump it all. Later, maybe less.
*/
for (i = 1; i <= CP_MAXCODE; i++)
ctl_putpeer(i, peer);
#ifdef REFCLOCK
/*
* for clock exception events:
* add clock variables to reflect info on exception
*/
if (err == EVNT_PEERCLOCK) {
struct refclockstat clock_stat;
struct ctl_var *kv;
clock_stat.kv_list = (struct ctl_var *)0;
refclock_control(&peer->srcadr,
(struct refclockstat *)0,
&clock_stat);
ctl_puthex("refclockstatus",
ctlclkstatus(&clock_stat));
for (i = 1; i <= CC_MAXCODE; i++)
ctl_putclock(i, &clock_stat, 0);
for (kv = clock_stat.kv_list; kv && !(kv->flags & EOV); kv++)
if (kv->flags & DEF)
ctl_putdata(kv->text, strlen(kv->text), 0);
free_varlist(clock_stat.kv_list);
}
#endif /*REFCLOCK*/
}
/*
* We're done, return.
*/
ctl_flushpkt(0);
}
/*
* 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_long
count_var(
struct ctl_var *k
)
{
register u_long c;
if (!k)
return 0;
c = 0;
while (!(k++->flags & EOV))
c++;
return c;
}
char *
add_var(
struct ctl_var **kv,
u_long size,
int def
)
{
register u_long c;
register struct ctl_var *k;
c = count_var(*kv);
k = *kv;
*kv = (struct ctl_var *)emalloc((c+2)*sizeof(struct ctl_var));
if (k)
{
memmove((char *)*kv, (char *)k, sizeof(struct ctl_var)*c);
free((char *)k);
}
(*kv)[c].code = (u_short) c;
(*kv)[c].text = (char *)emalloc(size);
(*kv)[c].flags = def;
(*kv)[c+1].code = 0;
(*kv)[c+1].text = (char *)0;
(*kv)[c+1].flags = EOV;
return (char *)(*kv)[c].text;
}
void
set_var(
struct ctl_var **kv,
const char *data,
u_long size,
int def
)
{
register struct ctl_var *k;
register const char *s;
register const char *t;
char *td;
if (!data || !size)
return;
if ((k = *kv))
{
while (!(k->flags & EOV))
{
s = data;
t = k->text;
if (t)
{
while (*t != '=' && *s - *t == 0)
{
s++;
t++;
}
if (*s == *t && ((*t == '=') || !*t))
{
free((void *)k->text);
td = (char *)emalloc(size);
memmove(td, data, size);
k->text =td;
k->flags = def;
return;
}
}
else
{
td = (char *)emalloc(size);
memmove(td, data, size);
k->text = td;
k->flags = def;
return;
}
k++;
}
}
td = add_var(kv, size, def);
memmove(td, data, size);
}
void
set_sys_var(
char *data,
u_long size,
int def
)
{
set_var(&ext_sys_var, data, size, def);
}
void
free_varlist(
struct ctl_var *kv
)
{
struct ctl_var *k;
if (kv)
{
for (k = kv; !(k->flags & EOV); k++)
free((void *)k->text);
free((void *)kv);
}
}
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