active: rework make_socket_fd() to be based on socket_address_listen()

Among other things this makes sure we set SO_REUSEADDR which is
immensely useful.

3 files changed, 25 insertions, 64 deletions

diff --git a/src/shared/socket-label.c b/src/shared/socket-label.c
index ff212de825..c8be17a1d5 100644
--- a/src/shared/socket-label.c
+++ b/src/shared/socket-label.c
@@ -41,6 +41,7 @@
 
 int socket_address_listen(
                 const SocketAddress *a,
+                int flags,
                 int backlog,
                 SocketAddressBindIPv6Only only,
                 const char *bind_to_device,
@@ -48,27 +49,31 @@ int socket_address_listen(
                 bool transparent,
                 mode_t directory_mode,
                 mode_t socket_mode,
-                const char *label,
-                int *ret) {
+                const char *label) {
+
+        _cleanup_close_ int fd = -1;
+        int r, one;
 
-        int r, fd, one;
         assert(a);
-        assert(ret);
 
-        if ((r = socket_address_verify(a)) < 0)
+        r = socket_address_verify(a);
+        if (r < 0)
                 return r;
 
         if (socket_address_family(a) == AF_INET6 && !socket_ipv6_is_supported())
                 return -EAFNOSUPPORT;
 
-        r = label_socket_set(label);
-        if (r < 0)
-                return r;
+        if (label) {
+                r = label_socket_set(label);
+                if (r < 0)
+                        return r;
+        }
 
-        fd = socket(socket_address_family(a), a->type | SOCK_NONBLOCK | SOCK_CLOEXEC, a->protocol);
+        fd = socket(socket_address_family(a), a->type | flags, a->protocol);
         r = fd < 0 ? -errno : 0;
 
-        label_socket_clear();
+        if (label)
+                label_socket_clear();
 
         if (r < 0)
                 return r;
@@ -77,13 +82,13 @@ int socket_address_listen(
                 int flag = only == SOCKET_ADDRESS_IPV6_ONLY;
 
                 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag)) < 0)
-                        goto fail;
+                        return -errno;
         }
 
         if (socket_address_family(a) == AF_INET || socket_address_family(a) == AF_INET6) {
                 if (bind_to_device)
                         if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, bind_to_device, strlen(bind_to_device)+1) < 0)
-                                goto fail;
+                                return -errno;
 
                 if (free_bind) {
                         one = 1;
@@ -100,7 +105,7 @@ int socket_address_listen(
 
         one = 1;
         if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
-                goto fail;
+                return -errno;
 
         if (socket_address_family(a) == AF_UNIX && a->sockaddr.un.sun_path[0] != 0) {
                 mode_t old_mask;
@@ -108,7 +113,7 @@ int socket_address_listen(
                 /* Create parents */
                 mkdir_parents_label(a->sockaddr.un.sun_path, directory_mode);
 
-                /* Enforce the right access mode for the socket*/
+                /* Enforce the right access mode for the socket */
                 old_mask = umask(~ socket_mode);
 
                 /* Include the original umask in our mask */
@@ -127,17 +132,14 @@ int socket_address_listen(
                 r = bind(fd, &a->sockaddr.sa, a->size);
 
         if (r < 0)
-                goto fail;
+                return -errno;
 
         if (socket_address_can_accept(a))
                 if (listen(fd, backlog) < 0)
-                        goto fail;
+                        return -errno;
 
-        *ret = fd;
-        return 0;
+        r = fd;
+        fd = -1;
 
-fail:
-        r = -errno;
-        close_nointr_nofail(fd);
         return r;
 }
diff --git a/src/shared/socket-util.c b/src/shared/socket-util.c
index 954686f974..1175795d7c 100644
--- a/src/shared/socket-util.c
+++ b/src/shared/socket-util.c
@@ -568,45 +568,6 @@ bool socket_address_matches_fd(const SocketAddress *a, int fd) {
         return false;
 }
 
-int make_socket_fd(const char* address, int flags) {
-        SocketAddress a;
-        int fd, r;
-        _cleanup_free_ char *p = NULL;
-
-        r = socket_address_parse(&a, address);
-        if (r < 0) {
-                log_error("failed to parse socket: %s", strerror(-r));
-                return r;
-        }
-
-        fd = socket(socket_address_family(&a), flags, 0);
-        if (fd < 0) {
-                log_error("socket(): %m");
-                return -errno;
-        }
-
-        r = socket_address_print(&a, &p);
-        if (r < 0) {
-                log_error("socket_address_print(): %s", strerror(-r));
-                return r;
-        }
-        log_info("Listening on %s", p);
-
-        r = bind(fd, &a.sockaddr.sa, a.size);
-        if (r < 0) {
-                log_error("bind to %s: %m", address);
-                return -errno;
-        }
-
-        r = listen(fd, SOMAXCONN);
-        if (r < 0) {
-                log_error("listen on %s: %m", address);
-                return -errno;
-        }
-
-        return fd;
-}
-
 static const char* const netlink_family_table[] = {
         [NETLINK_ROUTE] = "route",
         [NETLINK_FIREWALL] = "firewall",
diff --git a/src/shared/socket-util.h b/src/shared/socket-util.h
index e0b85adf9f..0b9bf2fefc 100644
--- a/src/shared/socket-util.h
+++ b/src/shared/socket-util.h
@@ -73,6 +73,7 @@ bool socket_address_can_accept(const SocketAddress *a) _pure_;
 
 int socket_address_listen(
                 const SocketAddress *a,
+                int flags,
                 int backlog,
                 SocketAddressBindIPv6Only only,
                 const char *bind_to_device,
@@ -80,16 +81,13 @@ int socket_address_listen(
                 bool transparent,
                 mode_t directory_mode,
                 mode_t socket_mode,
-                const char *label,
-                int *ret);
+                const char *label);
 
 bool socket_address_is(const SocketAddress *a, const char *s, int type);
 bool socket_address_is_netlink(const SocketAddress *a, const char *s);
 
 bool socket_address_matches_fd(const SocketAddress *a, int fd);
 
-int make_socket_fd(const char* address, int flags);
-
 bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_;
 
 const char* socket_address_get_path(const SocketAddress *a);