static void server_process_entry_meta(
const char *p, size_t l,
const struct ucred *ucred,
int *priority,
char **identifier,
char **message,
pid_t *object_pid) {
/* We need to determine the priority of this entry for the rate limiting logic */
if (l == 10 &&
startswith(p, "PRIORITY=") &&
p[9] >= '0' && p[9] <= '9')
*priority = (*priority & LOG_FACMASK) | (p[9] - '0');
else if (l == 17 &&
startswith(p, "SYSLOG_FACILITY=") &&
p[16] >= '0' && p[16] <= '9')
*priority = (*priority & LOG_PRIMASK) | ((p[16] - '0') << 3);
else if (l == 18 &&
startswith(p, "SYSLOG_FACILITY=") &&
p[16] >= '0' && p[16] <= '9' &&
p[17] >= '0' && p[17] <= '9')
*priority = (*priority & LOG_PRIMASK) | (((p[16] - '0')*10 + (p[17] - '0')) << 3);
else if (l >= 19 &&
startswith(p, "SYSLOG_IDENTIFIER=")) {
char *t;
t = strndup(p + 18, l - 18);
if (t) {
free(*identifier);
*identifier = t;
}
} else if (l >= 8 &&
startswith(p, "MESSAGE=")) {
char *t;
t = strndup(p + 8, l - 8);
if (t) {
free(*message);
*message = t;
}
} else if (l > STRLEN("OBJECT_PID=") &&
l < STRLEN("OBJECT_PID=") + DECIMAL_STR_MAX(pid_t) &&
startswith(p, "OBJECT_PID=") &&
allow_object_pid(ucred)) {
char buf[DECIMAL_STR_MAX(pid_t)];
memcpy(buf, p + STRLEN("OBJECT_PID="),
l - STRLEN("OBJECT_PID="));
buf[l-STRLEN("OBJECT_PID=")] = '\0';
(void) parse_pid(buf, object_pid);
}
}
void server_process_native_message(
Server *s,
const void *buffer, size_t buffer_size,
const struct ucred *ucred,
const struct timeval *tv,
const char *label, size_t label_len) {
struct iovec *iovec = NULL;
unsigned n = 0, j, tn = (unsigned) -1;
const char *p;
size_t remaining, m = 0, entry_size = 0;
int priority = LOG_INFO;
char *identifier = NULL, *message = NULL;
pid_t object_pid = 0;
assert(s);
assert(buffer || buffer_size == 0);
p = buffer;
remaining = buffer_size;
while (remaining > 0) {
const char *e, *q;
e = memchr(p, '\n', remaining);
if (!e) {
/* Trailing noise, let's ignore it, and flush what we collected */
log_debug("Received message with trailing noise, ignoring.");
break;
}
if (e == p) {
/* Entry separator */
if (entry_size + n + 1 > ENTRY_SIZE_MAX) { /* data + separators + trailer */
log_debug("Entry is too big with %u properties and %zu bytes, ignoring.", n, entry_size);
continue;
}
server_dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority, object_pid);
n = 0;
priority = LOG_INFO;
entry_size = 0;
p++;
remaining--;
continue;
}
if (*p == '.' || *p == '#') {
/* Ignore control commands for now, and
* comments too. */
remaining -= (e - p) + 1;
p = e + 1;
continue;
}
/* A property follows */
/* n existing properties, 1 new, +1 for _TRANSPORT */
if (!GREEDY_REALLOC(iovec, m, n + 2 + N_IOVEC_META_FIELDS + N_IOVEC_OBJECT_FIELDS)) {
log_oom();
break;
}
q = memchr(p, '=', e - p);
if (q) {
if (valid_user_field(p, q - p, false)) {
size_t l;
l = e - p;
/* If the field name starts with an
* underscore, skip the variable,
* since that indidates a trusted
* field */
iovec[n].iov_base = (char*) p;
iovec[n].iov_len = l;
entry_size += iovec[n].iov_len;
n++;
/* We need to determine the priority
* of this entry for the rate limiting
* logic */
if (l == 10 &&
startswith(p, "PRIORITY=") &&
p[9] >= '0' && p[9] <= '9')
priority = (priority & LOG_FACMASK) | (p[9] - '0');
else if (l == 17 &&
startswith(p, "SYSLOG_FACILITY=") &&
p[16] >= '0' && p[16] <= '9')
priority = (priority & LOG_PRIMASK) | ((p[16] - '0') << 3);
else if (l == 18 &&
startswith(p, "SYSLOG_FACILITY=") &&
p[16] >= '0' && p[16] <= '9' &&
p[17] >= '0' && p[17] <= '9')
priority = (priority & LOG_PRIMASK) | (((p[16] - '0')*10 + (p[17] - '0')) << 3);
else if (l >= 19 &&
startswith(p, "SYSLOG_IDENTIFIER=")) {
char *t;
t = strndup(p + 18, l - 18);
if (t) {
free(identifier);
identifier = t;
}
} else if (l >= 8 &&
startswith(p, "MESSAGE=")) {
char *t;
t = strndup(p + 8, l - 8);
if (t) {
free(message);
message = t;
}
} else if (l > strlen("OBJECT_PID=") &&
l < strlen("OBJECT_PID=") + DECIMAL_STR_MAX(pid_t) &&
startswith(p, "OBJECT_PID=") &&
allow_object_pid(ucred)) {
char buf[DECIMAL_STR_MAX(pid_t)];
memcpy(buf, p + strlen("OBJECT_PID="), l - strlen("OBJECT_PID="));
buf[l-strlen("OBJECT_PID=")] = '\0';
/* ignore error */
parse_pid(buf, &object_pid);
}
}
remaining -= (e - p) + 1;
p = e + 1;
continue;
} else {
le64_t l_le;
uint64_t l;
char *k;
if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
log_debug("Failed to parse message, ignoring.");
break;
}
memcpy(&l_le, e + 1, sizeof(uint64_t));
l = le64toh(l_le);
if (l > DATA_SIZE_MAX) {
log_debug("Received binary data block of %"PRIu64" bytes is too large, ignoring.", l);
break;
}
if ((uint64_t) remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
e[1+sizeof(uint64_t)+l] != '\n') {
log_debug("Failed to parse message, ignoring.");
break;
}
k = malloc((e - p) + 1 + l);
if (!k) {
log_oom();
break;
}
memcpy(k, p, e - p);
k[e - p] = '=';
memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
if (valid_user_field(p, e - p, false)) {
iovec[n].iov_base = k;
iovec[n].iov_len = (e - p) + 1 + l;
entry_size += iovec[n].iov_len;
n++;
} else
free(k);
remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
p = e + 1 + sizeof(uint64_t) + l + 1;
}
}
if (n <= 0)
goto finish;
tn = n++;
IOVEC_SET_STRING(iovec[tn], "_TRANSPORT=journal");
entry_size += strlen("_TRANSPORT=journal");
if (entry_size + n + 1 > ENTRY_SIZE_MAX) { /* data + separators + trailer */
log_debug("Entry is too big with %u properties and %zu bytes, ignoring.",
n, entry_size);
goto finish;
}
if (message) {
if (s->forward_to_syslog)
server_forward_syslog(s, priority, identifier, message, ucred, tv);
if (s->forward_to_kmsg)
server_forward_kmsg(s, priority, identifier, message, ucred);
if (s->forward_to_console)
server_forward_console(s, priority, identifier, message, ucred);
if (s->forward_to_wall)
server_forward_wall(s, priority, identifier, message, ucred);
}
server_dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority, object_pid);
finish:
for (j = 0; j < n; j++) {
if (j == tn)
continue;
if (iovec[j].iov_base < buffer ||
(const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
free(iovec[j].iov_base);
}
free(iovec);
free(identifier);
free(message);
}
