blobmsg: allow BLOBMSG_TYPE_UNSPEC attributes, treat them as null for JSON conversion
[project/libubox.git] / usock.c
diff --git a/usock.c b/usock.c
index 613b2dd..6458151 100644 (file)
--- a/usock.c
+++ b/usock.c
@@ -7,96 +7,95 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <string.h>
+#include <stdbool.h>
 
 #include "usock.h"
 
-int usock(int type, const char *host, const char *service) {
-       int sock = -1;
+static void usock_set_flags(int sock, unsigned int type)
+{
+       if (!(type & USOCK_NOCLOEXEC))
+               fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC);
+
+       if (type & USOCK_NONBLOCK)
+               fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK);
+}
+
+static int usock_connect(struct sockaddr *sa, int sa_len, int family, int socktype, bool server)
+{
+       int sock;
+
+       sock = socket(family, socktype, 0);
+       if (sock < 0)
+               return -1;
+
+       if (server) {
+               const int one = 1;
+               setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
 
-       if (service && !(type & USOCK_UNIX)) {
-               struct addrinfo *result, *rp;
-
-               struct addrinfo hints = {
-                       .ai_family = (type & USOCK_IPV6ONLY) ? AF_INET6 :
-                               (type & USOCK_IPV4ONLY) ? AF_INET : AF_UNSPEC,
-                       .ai_socktype = ((type & 0xff) == USOCK_TCP)
-                               ? SOCK_STREAM : SOCK_DGRAM,
-                       .ai_flags = AI_ADDRCONFIG
-                               | ((type & USOCK_SERVER) ? AI_PASSIVE : 0)
-                               | ((type & USOCK_NUMERIC) ? AI_NUMERICHOST : 0),
-               };
-
-               if (getaddrinfo(host, service, &hints, &result)) {
-                       return -1;
-               }
-
-               for (rp = result; rp != NULL; rp = rp->ai_next) {
-                       if ((sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol))
-                       == -1) {
-                               continue;
-                       }
-
-                       if (!(type & USOCK_NOCLOEXEC)) {
-                               fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC);
-                       }
-
-                       if (type & USOCK_NONBLOCK) {
-                               fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK);
-                       }
-
-                       if (type & USOCK_SERVER) {
-                               const int one = 1;
-                               setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
-
-                               if (!bind(sock, rp->ai_addr, rp->ai_addrlen)
-                               && ((type & 0xff) != USOCK_TCP || !listen(sock, SOMAXCONN))) {
-                                       break;
-                               }
-                       } else {
-                               if (!connect(sock, rp->ai_addr, rp->ai_addrlen)
-                               || errno == EINPROGRESS) {
-                                       break;
-                               }
-                       }
-
-                       close(sock);
-                       sock = -1;
-               }
-               freeaddrinfo(result);
+               if (!bind(sock, sa, sa_len) &&
+                   (socktype != SOCK_STREAM || !listen(sock, SOMAXCONN)))
+                       return sock;
        } else {
-               struct sockaddr_un sun = {.sun_family = AF_UNIX};
-               if (strlen(host) >= sizeof(sun.sun_path)) {
-                       errno = EINVAL;
-                       return -1;
-               }
-               strcpy(sun.sun_path, host);
-
-               if ((sock = socket(AF_UNIX, ((type & 0xff) == USOCK_TCP)
-                               ? SOCK_STREAM : SOCK_DGRAM, 0)) == -1) {
-                       return -1;
-               }
-
-               if (!(type & USOCK_NOCLOEXEC)) {
-                       fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC);
-               }
-
-               if (type & USOCK_NONBLOCK) {
-                       fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK);
-               }
-
-               if (type & USOCK_SERVER) {
-                       if (bind(sock, (struct sockaddr*)&sun, sizeof(sun)) ||
-                       ((type & 0xff) == USOCK_TCP && listen(sock, SOMAXCONN))) {
-                               close(sock);
-                               return -1;
-                       }
-               } else {
-                       if (connect(sock, (struct sockaddr*)&sun, sizeof(sun))
-                       && errno != EINPROGRESS) {
-                               close(sock);
-                               return -1;
-                       }
-               }
+               if (!connect(sock, sa, sa_len) || errno == EINPROGRESS)
+                       return sock;
        }
+
+       close(sock);
+       return -1;
+}
+
+static int usock_unix(const char *host, int socktype, bool server)
+{
+       struct sockaddr_un sun = {.sun_family = AF_UNIX};
+
+       if (strlen(host) >= sizeof(sun.sun_path)) {
+               errno = EINVAL;
+               return -1;
+       }
+       strcpy(sun.sun_path, host);
+
+       return usock_connect((struct sockaddr*)&sun, sizeof(sun), AF_UNIX, socktype, server);
+}
+
+static int usock_inet(int type, const char *host, const char *service, int socktype, bool server)
+{
+       struct addrinfo *result, *rp;
+       struct addrinfo hints = {
+               .ai_family = (type & USOCK_IPV6ONLY) ? AF_INET6 :
+                       (type & USOCK_IPV4ONLY) ? AF_INET : AF_UNSPEC,
+               .ai_socktype = socktype,
+               .ai_flags = AI_ADDRCONFIG
+                       | ((type & USOCK_SERVER) ? AI_PASSIVE : 0)
+                       | ((type & USOCK_NUMERIC) ? AI_NUMERICHOST : 0),
+       };
+       int sock = -1;
+
+       if (getaddrinfo(host, service, &hints, &result))
+               return -1;
+
+       for (rp = result; rp != NULL; rp = rp->ai_next) {
+               sock = usock_connect(rp->ai_addr, rp->ai_addrlen, rp->ai_family, socktype, server);
+               if (sock >= 0)
+                       break;
+       }
+
+       freeaddrinfo(result);
+       return sock;
+}
+
+int usock(int type, const char *host, const char *service) {
+       int socktype = ((type & 0xff) == USOCK_TCP) ? SOCK_STREAM : SOCK_DGRAM;
+       bool server = !!(type & USOCK_SERVER);
+       int sock;
+
+       if (type & USOCK_UNIX)
+               sock = usock_unix(host, socktype, server);
+       else
+               sock = usock_inet(type, host, service, socktype, server);
+
+       if (sock < 0)
+               return -1;
+
+       usock_set_flags(sock, type);
        return sock;
 }