-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
#include "fd-util.h"
#include "fs-util.h"
#include "io-util.h"
+#include "journal-importer.h"
+#include "journal-util.h"
#include "journald-console.h"
#include "journald-kmsg.h"
#include "journald-native.h"
#include "memfd-util.h"
#include "parse-util.h"
#include "path-util.h"
+#include "process-util.h"
#include "selinux-util.h"
#include "socket-util.h"
#include "string-util.h"
+#include "unaligned.h"
-bool valid_user_field(const char *p, size_t l, bool allow_protected) {
- const char *a;
-
- /* We kinda enforce POSIX syntax recommendations for
- environment variables here, but make a couple of additional
- requirements.
-
- http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
-
- /* No empty field names */
- if (l <= 0)
- return false;
-
- /* Don't allow names longer than 64 chars */
- if (l > 64)
- return false;
+static bool allow_object_pid(const struct ucred *ucred) {
+ return ucred && ucred->uid == 0;
+}
- /* Variables starting with an underscore are protected */
- if (!allow_protected && p[0] == '_')
- return false;
+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;
+ }
- /* Don't allow digits as first character */
- if (p[0] >= '0' && p[0] <= '9')
- return false;
+ } else if (l >= 8 &&
+ startswith(p, "MESSAGE=")) {
+ char *t;
- /* Only allow A-Z0-9 and '_' */
- for (a = p; a < p + l; a++)
- if ((*a < 'A' || *a > 'Z') &&
- (*a < '0' || *a > '9') &&
- *a != '_')
- return false;
+ t = strndup(p + 8, l - 8);
+ if (t) {
+ free(*message);
+ *message = t;
+ }
- return true;
-}
+ } 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';
-static bool allow_object_pid(const struct ucred *ucred) {
- return ucred && ucred->uid == 0;
+ (void) parse_pid(buf, object_pid);
+ }
}
-void server_process_native_message(
+static int server_process_entry(
Server *s,
- const void *buffer, size_t buffer_size,
+ const void *buffer, size_t *remaining,
+ ClientContext *context,
const struct ucred *ucred,
const struct timeval *tv,
const char *label, size_t label_len) {
+ /* Process a single entry from a native message. Returns 0 if nothing special happened and the message
+ * processing should continue, and a negative or positive value otherwise.
+ *
+ * Note that *remaining is altered on both success and failure. */
+
+ size_t n = 0, j, tn = (size_t) -1, m = 0, entry_size = 0;
+ char *identifier = NULL, *message = NULL;
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);
+ const char *p;
+ int r = 0;
p = buffer;
- remaining = buffer_size;
- while (remaining > 0) {
+ while (*remaining > 0) {
const char *e, *q;
- e = memchr(p, '\n', remaining);
+ 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.");
+ r = 1; /* finish processing of the message */
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;
+ *remaining -= 1;
+ break;
}
- if (*p == '.' || *p == '#') {
+ if (IN_SET(*p, '.', '#')) {
/* Ignore control commands for now, and
* comments too. */
- remaining -= (e - p) + 1;
+ *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();
+ if (!GREEDY_REALLOC(iovec, m,
+ n + 2 +
+ N_IOVEC_META_FIELDS + N_IOVEC_OBJECT_FIELDS +
+ client_context_extra_fields_n_iovec(context))) {
+ r = log_oom();
break;
}
q = memchr(p, '=', e - p);
if (q) {
- if (valid_user_field(p, q - p, false)) {
+ if (journal_field_valid(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++;
+ /* If the field name starts with an underscore, skip the variable, since that indicates
+ * a trusted field */
+ iovec[n++] = IOVEC_MAKE((char*) p, l);
+ entry_size += l;
- /* 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="));
- char_array_0(buf);
-
- /* ignore error */
- parse_pid(buf, &object_pid);
- }
+ server_process_entry_meta(p, l, ucred,
+ &priority,
+ &identifier,
+ &message,
+ &object_pid);
}
- remaining -= (e - p) + 1;
+ *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) {
+ 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);
+ l = unaligned_read_le64(e + 1);
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 ||
+ 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[e - p] = '=';
memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
- if (valid_user_field(p, e - p, false)) {
+ if (journal_field_valid(p, e - p, false)) {
iovec[n].iov_base = k;
iovec[n].iov_len = (e - p) + 1 + l;
entry_size += iovec[n].iov_len;
n++;
+
+ server_process_entry_meta(k, (e - p) + 1 + l, ucred,
+ &priority,
+ &identifier,
+ &message,
+ &object_pid);
} else
free(k);
- remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
+ *remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
p = e + 1 + sizeof(uint64_t) + l + 1;
}
}
- if (n <= 0)
+ if (n <= 0) {
+ r = 1;
goto finish;
+ }
+
+ if (!client_context_test_priority(context, priority)) {
+ r = 0;
+ goto finish;
+ }
tn = n++;
- IOVEC_SET_STRING(iovec[tn], "_TRANSPORT=journal");
+ iovec[tn] = IOVEC_MAKE_STRING("_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);
+ log_debug("Entry is too big with %zu 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);
+ server_forward_syslog(s, syslog_fixup_facility(priority), identifier, message, ucred, tv);
if (s->forward_to_kmsg)
server_forward_kmsg(s, priority, identifier, message, ucred);
server_forward_wall(s, priority, identifier, message, ucred);
}
- server_dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority, object_pid);
+ server_dispatch_message(s, iovec, n, m, context, tv, priority, object_pid);
finish:
for (j = 0; j < n; j++) {
continue;
if (iovec[j].iov_base < buffer ||
- (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
+ (const char*) iovec[j].iov_base >= p + *remaining)
free(iovec[j].iov_base);
}
free(iovec);
free(identifier);
free(message);
+
+ return r;
+}
+
+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) {
+
+ size_t remaining = buffer_size;
+ ClientContext *context = NULL;
+ int r;
+
+ assert(s);
+ assert(buffer || buffer_size == 0);
+
+ if (ucred && pid_is_valid(ucred->pid)) {
+ r = client_context_get(s, ucred->pid, ucred, label, label_len, NULL, &context);
+ if (r < 0)
+ log_warning_errno(r, "Failed to retrieve credentials for PID " PID_FMT ", ignoring: %m", ucred->pid);
+ }
+
+ do {
+ r = server_process_entry(s,
+ (const uint8_t*) buffer + (buffer_size - remaining), &remaining,
+ context, ucred, tv, label, label_len);
+ } while (r == 0);
}
void server_process_native_file(
}
int server_open_native_socket(Server*s) {
+
+ static const union sockaddr_union sa = {
+ .un.sun_family = AF_UNIX,
+ .un.sun_path = "/run/systemd/journal/socket",
+ };
static const int one = 1;
int r;
assert(s);
if (s->native_fd < 0) {
- union sockaddr_union sa = {
- .un.sun_family = AF_UNIX,
- .un.sun_path = "/run/systemd/journal/socket",
- };
-
s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (s->native_fd < 0)
return log_error_errno(errno, "socket() failed: %m");
- unlink(sa.un.sun_path);
+ (void) unlink(sa.un.sun_path);
- r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
+ r = bind(s->native_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
if (r < 0)
return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
if (r < 0)
return log_error_errno(errno, "SO_PASSCRED failed: %m");
-#ifdef HAVE_SELINUX
- if (mac_selinux_have()) {
+#if HAVE_SELINUX
+ if (mac_selinux_use()) {
r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one));
if (r < 0)
log_warning_errno(errno, "SO_PASSSEC failed: %m");
projects / thirdparty / systemd.git / blobdiff