1 /* $OpenBSD: logmsg.c,v 1.10 2023/10/14 09:46:14 claudio Exp $ */ 2 3 /* 4 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <errno.h> 20 #include <stdarg.h> 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <sys/types.h> 25 #include <syslog.h> 26 27 #include "bgpd.h" 28 #include "session.h" 29 #include "log.h" 30 31 char * 32 log_fmt_peer(const struct peer_config *peer) 33 { 34 const char *ip; 35 char *pfmt, *p; 36 37 ip = log_addr(&peer->remote_addr); 38 if ((peer->remote_addr.aid == AID_INET && peer->remote_masklen != 32) || 39 (peer->remote_addr.aid == AID_INET6 && 40 peer->remote_masklen != 128)) { 41 if (asprintf(&p, "%s/%u", ip, peer->remote_masklen) == -1) 42 fatal(NULL); 43 } else { 44 if ((p = strdup(ip)) == NULL) 45 fatal(NULL); 46 } 47 48 if (peer->descr[0]) { 49 if (asprintf(&pfmt, "neighbor %s (%s)", p, peer->descr) == 50 -1) 51 fatal(NULL); 52 } else { 53 if (asprintf(&pfmt, "neighbor %s", p) == -1) 54 fatal(NULL); 55 } 56 free(p); 57 return (pfmt); 58 } 59 60 void 61 log_peer_info(const struct peer_config *peer, const char *emsg, ...) 62 { 63 char *p, *msg; 64 va_list ap; 65 66 p = log_fmt_peer(peer); 67 va_start(ap, emsg); 68 if (vasprintf(&msg, emsg, ap) == -1) 69 fatal(NULL); 70 va_end(ap); 71 logit(LOG_INFO, "%s: %s", p, msg); 72 free(msg); 73 free(p); 74 } 75 76 void 77 log_peer_warn(const struct peer_config *peer, const char *emsg, ...) 78 { 79 char *p, *msg; 80 va_list ap; 81 int saved_errno = errno; 82 83 p = log_fmt_peer(peer); 84 if (emsg == NULL) { 85 logit(LOG_ERR, "%s: %s", p, strerror(saved_errno)); 86 } else { 87 va_start(ap, emsg); 88 if (vasprintf(&msg, emsg, ap) == -1) 89 fatal(NULL); 90 va_end(ap); 91 logit(LOG_ERR, "%s: %s: %s", p, msg, strerror(saved_errno)); 92 free(msg); 93 } 94 free(p); 95 } 96 97 void 98 log_peer_warnx(const struct peer_config *peer, const char *emsg, ...) 99 { 100 char *p, *msg; 101 va_list ap; 102 103 p = log_fmt_peer(peer); 104 va_start(ap, emsg); 105 if (vasprintf(&msg, emsg, ap) == -1) 106 fatal(NULL); 107 va_end(ap); 108 logit(LOG_ERR, "%s: %s", p, msg); 109 free(msg); 110 free(p); 111 } 112 113 void 114 log_statechange(struct peer *peer, enum session_state nstate, 115 enum session_events event) 116 { 117 char *p; 118 119 /* don't clutter the logs with constant Connect -> Active -> Connect */ 120 if (nstate == STATE_CONNECT && peer->state == STATE_ACTIVE && 121 peer->prev_state == STATE_CONNECT) 122 return; 123 if (nstate == STATE_ACTIVE && peer->state == STATE_CONNECT && 124 peer->prev_state == STATE_ACTIVE) 125 return; 126 127 peer->lasterr = 0; 128 p = log_fmt_peer(&peer->conf); 129 logit(LOG_INFO, "%s: state change %s -> %s, reason: %s", 130 p, statenames[peer->state], statenames[nstate], eventnames[event]); 131 free(p); 132 } 133 134 void 135 log_notification(const struct peer *peer, uint8_t errcode, uint8_t subcode, 136 u_char *data, uint16_t datalen, const char *dir) 137 { 138 char *p; 139 const char *suberrname = NULL; 140 int uk = 0; 141 142 p = log_fmt_peer(&peer->conf); 143 switch (errcode) { 144 case ERR_HEADER: 145 if (subcode >= sizeof(suberr_header_names) / sizeof(char *) || 146 suberr_header_names[subcode] == NULL) 147 uk = 1; 148 else 149 suberrname = suberr_header_names[subcode]; 150 break; 151 case ERR_OPEN: 152 if (subcode >= sizeof(suberr_open_names) / sizeof(char *) || 153 suberr_open_names[subcode] == NULL) 154 uk = 1; 155 else 156 suberrname = suberr_open_names[subcode]; 157 break; 158 case ERR_UPDATE: 159 if (subcode >= sizeof(suberr_update_names) / sizeof(char *) || 160 suberr_update_names[subcode] == NULL) 161 uk = 1; 162 else 163 suberrname = suberr_update_names[subcode]; 164 break; 165 case ERR_CEASE: 166 if (subcode >= sizeof(suberr_cease_names) / sizeof(char *) || 167 suberr_cease_names[subcode] == NULL) 168 uk = 1; 169 else 170 suberrname = suberr_cease_names[subcode]; 171 break; 172 case ERR_HOLDTIMEREXPIRED: 173 if (subcode != 0) 174 uk = 1; 175 break; 176 case ERR_FSM: 177 if (subcode >= sizeof(suberr_fsm_names) / sizeof(char *) || 178 suberr_fsm_names[subcode] == NULL) 179 uk = 1; 180 else 181 suberrname = suberr_fsm_names[subcode]; 182 break; 183 case ERR_RREFRESH: 184 if (subcode >= sizeof(suberr_rrefresh_names) / sizeof(char *) || 185 suberr_rrefresh_names[subcode] == NULL) 186 uk = 1; 187 else 188 suberrname = suberr_rrefresh_names[subcode]; 189 break; 190 default: 191 logit(LOG_ERR, "%s: %s notification, unknown errcode " 192 "%u, subcode %u", p, dir, errcode, subcode); 193 free(p); 194 return; 195 } 196 197 if (uk) 198 logit(LOG_ERR, "%s: %s notification: %s, unknown subcode %u", 199 p, dir, errnames[errcode], subcode); 200 else { 201 if (suberrname == NULL) 202 logit(LOG_ERR, "%s: %s notification: %s", p, 203 dir, errnames[errcode]); 204 else 205 logit(LOG_ERR, "%s: %s notification: %s, %s", 206 p, dir, errnames[errcode], suberrname); 207 } 208 free(p); 209 } 210 211 void 212 log_conn_attempt(const struct peer *peer, struct sockaddr *sa, socklen_t len) 213 { 214 char *p; 215 216 if (peer == NULL) { /* connection from non-peer, drop */ 217 if (log_getverbose()) 218 logit(LOG_INFO, "connection from non-peer %s refused", 219 log_sockaddr(sa, len)); 220 } else { 221 /* only log if there is a chance that the session may come up */ 222 if (peer->conf.down && peer->state == STATE_IDLE) 223 return; 224 p = log_fmt_peer(&peer->conf); 225 logit(LOG_INFO, "Connection attempt from %s while session is " 226 "in state %s", p, statenames[peer->state]); 227 free(p); 228 } 229 } 230