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Diffstat (limited to 'src/socket.c')
-rw-r--r--src/socket.c188
1 files changed, 146 insertions, 42 deletions
diff --git a/src/socket.c b/src/socket.c
index 78fc049a95..257a4e959a 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -129,6 +129,42 @@ static void socket_done(Unit *u) {
}
}
+static int socket_instantiate_service(Socket *s) {
+ char *prefix, *name;
+ int r;
+ Unit *u;
+
+ assert(s);
+
+ /* This fills in s->service if it isn't filled in yet. For
+ * Accept=yes sockets we create the next connection service
+ * here. For Accept=no this is mostly a NOP since the service
+ * is figured out at load time anyway. */
+
+ if (s->service)
+ return 0;
+
+ assert(s->accept);
+
+ if (!(prefix = unit_name_to_prefix(s->meta.id)))
+ return -ENOMEM;
+
+ r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted);
+ free(prefix);
+
+ if (r < 0)
+ return -ENOMEM;
+
+ r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
+ free(name);
+
+ if (r < 0)
+ return r;
+
+ s->service = SERVICE(u);
+ return 0;
+}
+
static bool have_non_accept_socket(Socket *s) {
SocketPort *p;
@@ -460,8 +496,7 @@ static int instance_from_socket(int fd, unsigned nr, char **instance) {
b = ntohl(remote.in.sin_addr.s_addr);
if (asprintf(&r,
- "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
- nr,
+ "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
ntohs(local.in.sin_port),
b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
@@ -483,8 +518,7 @@ static int instance_from_socket(int fd, unsigned nr, char **instance) {
*b = remote.in6.sin6_addr.s6_addr+12;
if (asprintf(&r,
- "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
- nr,
+ "%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
a[0], a[1], a[2], a[3],
ntohs(local.in6.sin6_port),
b[0], b[1], b[2], b[3],
@@ -494,8 +528,7 @@ static int instance_from_socket(int fd, unsigned nr, char **instance) {
char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
if (asprintf(&r,
- "%u-%s:%u-%s:%u",
- nr,
+ "%s:%u-%s:%u",
inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
ntohs(local.in6.sin6_port),
inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
@@ -600,7 +633,7 @@ static void socket_apply_socket_options(Socket *s, int fd) {
}
}
-static void socket_apply_pipe_options(Socket *s, int fd) {
+static void socket_apply_fifo_options(Socket *s, int fd) {
assert(s);
assert(fd >= 0);
@@ -609,12 +642,90 @@ static void socket_apply_pipe_options(Socket *s, int fd) {
log_warning("F_SETPIPE_SZ: %m");
}
+static int fifo_address_create(
+ const char *path,
+ mode_t directory_mode,
+ mode_t socket_mode,
+ /* FIXME SELINUX: pass SELinux context object here */
+ int *_fd) {
+
+ int fd = -1, r;
+ struct stat st;
+ mode_t old_mask;
+
+ assert(path);
+ assert(_fd);
+
+ mkdir_parents(path, directory_mode);
+
+ /* FIXME SELINUX: The mkfifo here should be done with
+ * the right SELinux context set */
+
+ /* Enforce the right access mode for the fifo */
+ old_mask = umask(~ socket_mode);
+
+ /* Include the original umask in our mask */
+ umask(~socket_mode | old_mask);
+
+ r = mkfifo(path, socket_mode);
+ umask(old_mask);
+
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (fstat(fd, &st) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (!S_ISFIFO(st.st_mode) ||
+ st.st_mode != (socket_mode & ~old_mask) ||
+ st.st_uid != getuid() ||
+ st.st_gid != getgid()) {
+
+ r = -EEXIST;
+ goto fail;
+ }
+
+ *_fd = fd;
+ return 0;
+
+fail:
+ if (fd >= 0)
+ close_nointr_nofail(fd);
+
+ return r;
+}
+
static int socket_open_fds(Socket *s) {
SocketPort *p;
int r;
assert(s);
+ /* FIXME SELINUX: Somewhere here we must set the the SELinux
+ context for the created sockets and FIFOs. To figure out
+ the executable name for this, use
+ socket_instantiate_service() and then access the executable
+ path name via
+ s->service->exec_command[SERVICE_EXEC_START]->path. Example:
+
+ if ((r = socket_instantiate_service(s)) < 0)
+ return r;
+
+ log_debug("Socket unit %s will spawn service unit %s with executable path %s.",
+ s->meta.id,
+ s->service->meta.id,
+ s->service->exec_command[SERVICE_EXEC_START]->path);
+ */
+
LIST_FOREACH(port, p, s->ports) {
if (p->fd >= 0)
@@ -630,41 +741,26 @@ static int socket_open_fds(Socket *s) {
s->free_bind,
s->directory_mode,
s->socket_mode,
+ /* FIXME SELINUX: Pass the SELinux context object here */
&p->fd)) < 0)
goto rollback;
socket_apply_socket_options(s, p->fd);
- } else {
- struct stat st;
- assert(p->type == SOCKET_FIFO);
-
- mkdir_parents(p->path, s->directory_mode);
-
- if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
- r = -errno;
- goto rollback;
- }
-
- if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
- r = -errno;
- goto rollback;
- }
+ } else if (p->type == SOCKET_FIFO) {
- if (fstat(p->fd, &st) < 0) {
- r = -errno;
+ if ((r = fifo_address_create(
+ p->path,
+ s->directory_mode,
+ s->socket_mode,
+ /* FIXME SELINUX: Pass the SELinux context object here */
+ &p->fd)) < 0)
goto rollback;
- }
- /* FIXME verify user, access mode */
+ socket_apply_fifo_options(s, p->fd);
- if (!S_ISFIFO(st.st_mode)) {
- r = -EEXIST;
- goto rollback;
- }
-
- socket_apply_pipe_options(s, p->fd);
- }
+ } else
+ assert_not_reached("Unknown port type");
}
return 0;
@@ -1059,8 +1155,8 @@ static void socket_enter_running(Socket *s, int cfd) {
socket_set_state(s, SOCKET_RUNNING);
} else {
- Unit *u;
char *prefix, *instance = NULL, *name;
+ Service *service;
if (s->n_connections >= s->max_connections) {
log_warning("Too many incoming connections (%u)", s->n_connections);
@@ -1068,7 +1164,10 @@ static void socket_enter_running(Socket *s, int cfd) {
return;
}
- if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)) < 0)
+ if ((r = socket_instantiate_service(s)) < 0)
+ goto fail;
+
+ if ((r = instance_from_socket(cfd, s->n_accepted, &instance)) < 0)
goto fail;
if (!(prefix = unit_name_to_prefix(s->meta.id))) {
@@ -1086,20 +1185,25 @@ static void socket_enter_running(Socket *s, int cfd) {
goto fail;
}
- r = manager_load_unit(s->meta.manager, name, NULL, NULL, &u);
- free(name);
-
- if (r < 0)
+ if ((r = unit_add_name(UNIT(s->service), name)) < 0) {
+ free(name);
goto fail;
+ }
+
+ service = s->service;
+ s->service = NULL;
+ s->n_accepted ++;
- if ((r = service_set_socket_fd(SERVICE(u), cfd, s)) < 0)
+ unit_choose_id(UNIT(service), name);
+ free(name);
+
+ if ((r = service_set_socket_fd(service, cfd, s)) < 0)
goto fail;
cfd = -1;
-
s->n_connections ++;
- if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, &error, NULL)) < 0)
+ if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL)) < 0)
goto fail;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-26 14:46:23 +0000