__send_log(logsrvs, tag, level, logline, data_len, default_rfc5424_sd_log_format, 2);
}
+/*
+ * This function parse a received log message <buf>, of size <buflen>
+ * it fills <level>, <facility> and <metadata> depending of the detected
+ * header format and message will point on remaining payload of <size>
+ *
+ * <metadata> must point on a preallocated array of LOG_META_FIELDS*sizeof(struct ist)
+ * struct ist len will be set to 0 if field is not found
+ * <level> and <facility> will be set to -1 if not found.
+ */
+void parse_log_message(char *buf, size_t buflen, int *level, int *facility,
+ struct ist *metadata, char **message, size_t *size)
+{
+
+ char *p;
+ int fac_level = 0;
+
+ *level = *facility = -1;
+
+ *message = buf;
+ *size = buflen;
+
+ memset(metadata, 0, LOG_META_FIELDS*sizeof(struct ist));
+
+ p = buf;
+ if (*size < 2 || *p != '<')
+ return;
+
+ p++;
+ while (*p != '>') {
+ if (*p > '9' || *p < '0')
+ return;
+ fac_level = 10*fac_level + (*p - '0');
+ p++;
+ if ((p - buf) > buflen)
+ return;
+ }
+
+ *facility = fac_level >> 3;
+ *level = fac_level & 0x7;
+ p++;
+
+ metadata[LOG_META_PRIO] = ist2(buf, p - buf);
+
+ buflen -= p - buf;
+ buf = p;
+
+ *size = buflen;
+ *message = buf;
+
+ /* for rfc5424, prio is always followed by '1' and ' ' */
+ if ((*size > 2) && (p[0] == '1') && (p[1] == ' ')) {
+ /* format is always '1 TIMESTAMP HOSTNAME TAG PID MSGID STDATA '
+ * followed by message.
+ * Each header field can present NILVALUE: '-'
+ */
+
+ p += 2;
+ /* timestamp is NILVALUE '-' */
+ if (*size > 2 && (p[0] == '-') && p[1] == ' ') {
+ metadata[LOG_META_TIME] = ist2(p, 1);
+ p++;
+ }
+ else if (*size > LOG_ISOTIME_MINLEN) {
+ metadata[LOG_META_TIME].ptr = p;
+
+ /* check if optionnal secfrac is present
+ * in timestamp.
+ * possible format are:
+ * ex: '1970-01-01T00:00:00.000000Z'
+ * '1970-01-01T00:00:00.000000+00:00'
+ * '1970-01-01T00:00:00.000000-00:00'
+ * '1970-01-01T00:00:00Z'
+ * '1970-01-01T00:00:00+00:00'
+ * '1970-01-01T00:00:00-00:00'
+ */
+ p += 19;
+ if (*p == '.') {
+ p++;
+ if ((p - buf) >= buflen)
+ goto bad_format;
+ while (*p != 'Z' && *p != '+' && *p != '-') {
+ if ((unsigned char)(*p - '0') > 9)
+ goto bad_format;
+
+ p++;
+ if ((p - buf) >= buflen)
+ goto bad_format;
+ }
+ }
+
+ if (*p == 'Z')
+ p++;
+ else
+ p += 6; /* case of '+00:00 or '-00:00' */
+
+ if ((p - buf) >= buflen || *p != ' ')
+ goto bad_format;
+ metadata[LOG_META_TIME].len = p - metadata[LOG_META_TIME].ptr;
+ }
+ else
+ goto bad_format;
+
+
+ p++;
+ if ((p - buf) >= buflen || *p == ' ')
+ goto bad_format;
+
+ metadata[LOG_META_HOST].ptr = p;
+ while (*p != ' ') {
+ p++;
+ if ((p - buf) >= buflen)
+ goto bad_format;
+ }
+ metadata[LOG_META_HOST].len = p - metadata[LOG_META_HOST].ptr;
+ if (metadata[LOG_META_HOST].len == 1 && metadata[LOG_META_HOST].ptr[0] == '-')
+ metadata[LOG_META_HOST].len = 0;
+
+ p++;
+ if ((p - buf) >= buflen || *p == ' ')
+ goto bad_format;
+
+ metadata[LOG_META_TAG].ptr = p;
+ while (*p != ' ') {
+ p++;
+ if ((p - buf) >= buflen)
+ goto bad_format;
+ }
+ metadata[LOG_META_TAG].len = p - metadata[LOG_META_TAG].ptr;
+ if (metadata[LOG_META_TAG].len == 1 && metadata[LOG_META_TAG].ptr[0] == '-')
+ metadata[LOG_META_TAG].len = 0;
+
+ p++;
+ if ((p - buf) >= buflen || *p == ' ')
+ goto bad_format;
+
+ metadata[LOG_META_PID].ptr = p;
+ while (*p != ' ') {
+ p++;
+ if ((p - buf) >= buflen)
+ goto bad_format;
+ }
+ metadata[LOG_META_PID].len = p - metadata[LOG_META_PID].ptr;
+ if (metadata[LOG_META_PID].len == 1 && metadata[LOG_META_PID].ptr[0] == '-')
+ metadata[LOG_META_PID].len = 0;
+
+ p++;
+ if ((p - buf) >= buflen || *p == ' ')
+ goto bad_format;
+
+ metadata[LOG_META_MSGID].ptr = p;
+ while (*p != ' ') {
+ p++;
+ if ((p - buf) >= buflen)
+ goto bad_format;
+ }
+ metadata[LOG_META_MSGID].len = p - metadata[LOG_META_MSGID].ptr;
+ if (metadata[LOG_META_MSGID].len == 1 && metadata[LOG_META_MSGID].ptr[0] == '-')
+ metadata[LOG_META_MSGID].len = 0;
+
+ p++;
+ if ((p - buf) >= buflen || *p == ' ')
+ goto bad_format;
+
+ /* structured data format is:
+ * ex:
+ * '[key1=value1 key2=value2][key3=value3]'
+ *
+ * space is invalid outside [] because
+ * considered as the end of structured data field
+ */
+ metadata[LOG_META_STDATA].ptr = p;
+ if (*p == '[') {
+ int elem = 0;
+
+ while (1) {
+ if (elem) {
+ /* according to rfc this char is escaped in param values */
+ if (*p == ']' && *(p-1) != '\\')
+ elem = 0;
+ }
+ else {
+ if (*p == '[')
+ elem = 1;
+ else if (*p == ' ')
+ break;
+ else
+ goto bad_format;
+ }
+ p++;
+ if ((p - buf) >= buflen)
+ goto bad_format;
+ }
+ }
+ else if (*p == '-') {
+ /* case of NILVALUE */
+ p++;
+ if ((p - buf) >= buflen || *p != ' ')
+ goto bad_format;
+ }
+ else
+ goto bad_format;
+
+ metadata[LOG_META_STDATA].len = p - metadata[LOG_META_STDATA].ptr;
+ if (metadata[LOG_META_STDATA].len == 1 && metadata[LOG_META_STDATA].ptr[0] == '-')
+ metadata[LOG_META_STDATA].len = 0;
+
+ p++;
+
+ buflen -= p - buf;
+ buf = p;
+
+ *size = buflen;
+ *message = p;
+ }
+ else if (*size > LOG_LEGACYTIME_LEN) {
+ int m;
+
+ /* supported header format according to rfc3164.
+ * ex:
+ * 'Jan 1 00:00:00 HOSTNAME TAG[PID]: '
+ * or 'Jan 1 00:00:00 HOSTNAME TAG: '
+ * or 'Jan 1 00:00:00 HOSTNAME '
+ * Note: HOSTNAME is mandatory, and day
+ * of month uses a single space prefix if
+ * less than 10 to ensure hour offset is
+ * always the same.
+ */
+
+ /* Check month to see if it correspond to a rfc3164
+ * header ex 'Jan 1 00:00:00' */
+ for (m = 0; m < 12; m++)
+ if (!memcmp(monthname[m], p, 3))
+ break;
+ /* Month not found */
+ if (m == 12)
+ goto bad_format;
+
+ metadata[LOG_META_TIME] = ist2(p, LOG_LEGACYTIME_LEN);
+
+ p += LOG_LEGACYTIME_LEN;
+ if ((p - buf) >= buflen || *p != ' ')
+ goto bad_format;
+
+ p++;
+ if ((p - buf) >= buflen || *p == ' ')
+ goto bad_format;
+
+ metadata[LOG_META_HOST].ptr = p;
+ while (*p != ' ') {
+ p++;
+ if ((p - buf) >= buflen)
+ goto bad_format;
+ }
+ metadata[LOG_META_HOST].len = p - metadata[LOG_META_HOST].ptr;
+
+ /* TAG seems to no be mandatory */
+ p++;
+
+ buflen -= p - buf;
+ buf = p;
+
+ *size = buflen;
+ *message = buf;
+
+ if (!buflen)
+ return;
+
+ while (((p - buf) < buflen) && *p != ' ' && *p != ':')
+ p++;
+
+ /* a tag must present a trailing ':' */
+ if (((p - buf) >= buflen) || *p != ':')
+ return;
+ p++;
+ /* followed by a space */
+ if (((p - buf) >= buflen) || *p != ' ')
+ return;
+
+ /* rewind to parse tag and pid */
+ p = buf;
+ metadata[LOG_META_TAG].ptr = p;
+ /* we have the guarantee that ':' will be reach before size limit */
+ while (*p != ':') {
+ if (*p == '[') {
+ metadata[LOG_META_TAG].len = p - metadata[LOG_META_TAG].ptr;
+ metadata[LOG_META_PID].ptr = p + 1;
+ }
+ else if (*p == ']' && metadata[LOG_META_PID].ptr) {
+ if (p[1] != ':')
+ return;
+ metadata[LOG_META_PID].len = p - metadata[LOG_META_PID].ptr;
+ }
+ p++;
+ }
+ if (!metadata[LOG_META_TAG].len)
+ metadata[LOG_META_TAG].len = p - metadata[LOG_META_TAG].ptr;
+
+ /* let pass ':' and ' ', we still have warranty size is large enought */
+ p += 2;
+
+ buflen -= p - buf;
+ buf = p;
+
+ *size = buflen;
+ *message = buf;
+ }
+
+ return;
+
+bad_format:
+ /* bad syslog format, we reset all parsed syslog fields
+ * but priority is kept because we are able to re-build
+ * this message using LOF_FORMAT_PRIO.
+ */
+ metadata[LOG_META_TIME].len = 0;
+ metadata[LOG_META_HOST].len = 0;
+ metadata[LOG_META_TAG].len = 0;
+ metadata[LOG_META_PID].len = 0;
+ metadata[LOG_META_MSGID].len = 0;
+ metadata[LOG_META_STDATA].len = 0;
+
+ return;
+}
+
+/*
+ * UDP syslog fd handler
+ */
+void syslog_fd_handler(int fd)
+{
+ static THREAD_LOCAL struct ist metadata[LOG_META_FIELDS];
+ ssize_t ret = 0;
+ struct buffer *buf = get_trash_chunk();
+ size_t size;
+ char *message;
+ int level;
+ int facility;
+ struct listener *l = objt_listener(fdtab[fd].owner);
+ int max_accept;
+
+ if(!l)
+ ABORT_NOW();
+
+ if (fdtab[fd].ev & FD_POLL_IN) {
+
+ if (!fd_recv_ready(fd))
+ return;
+
+ max_accept = l->maxaccept ? l->maxaccept : 1;
+
+ do {
+ /* Source address */
+ struct sockaddr_storage saddr = {0};
+ socklen_t saddrlen;
+
+ saddrlen = sizeof(saddr);
+
+ ret = recvfrom(fd, buf->area, buf->size, 0, (struct sockaddr *)&saddr, &saddrlen);
+ if (ret < 0) {
+ if (errno == EINTR)
+ continue;
+ if (errno == EAGAIN)
+ fd_cant_recv(fd);
+ goto out;
+ }
+ buf->data = ret;
+
+ parse_log_message(buf->area, buf->data, &level, &facility, metadata, &message, &size);
+
+ process_send_log(&l->bind_conf->frontend->logsrvs, level, facility, metadata, message, size);
+
+ } while (--max_accept);
+ }
+
+out:
+ return;
+}
/* parse the "show startup-logs" command, returns 1 if a message is returned, otherwise zero */
static int cli_parse_show_startup_logs(char **args, char *payload, struct appctx *appctx, void *private)
projects / thirdparty / haproxy.git / commitdiff
