libubox: lua: use pkg-config built in module to search for alternatives

[project/libubox.git] / usock.c

diff --git a/usock.c b/usock.c
index 64eab9e..6748ef3 100644 (file)
--- a/usock.c
+++ b/usock.c
@@ -20,6 +20,7 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <netdb.h>
+#include <poll.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <fcntl.h>
@@ -39,7 +40,7 @@ static void usock_set_flags(int sock, unsigned int type)
                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)
+static int usock_connect(int type, struct sockaddr *sa, int sa_len, int family, int socktype, bool server)
 {
        int sock;
 
@@ -47,6 +48,8 @@ static int usock_connect(struct sockaddr *sa, int sa_len, int family, int sockty
        if (sock < 0)
                return -1;
 
+       usock_set_flags(sock, type);
+
        if (server) {
                const int one = 1;
                setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
@@ -63,7 +66,7 @@ static int usock_connect(struct sockaddr *sa, int sa_len, int family, int sockty
        return -1;
 }
 
-static int usock_unix(const char *host, int socktype, bool server)
+static int usock_unix(int type, const char *host, int socktype, bool server)
 {
        struct sockaddr_un sun = {.sun_family = AF_UNIX};
 
@@ -73,7 +76,7 @@ static int usock_unix(const char *host, int socktype, bool server)
        }
        strcpy(sun.sun_path, host);
 
-       return usock_connect((struct sockaddr*)&sun, sizeof(sun), AF_UNIX, socktype, server);
+       return usock_connect(type, (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)
@@ -93,7 +96,7 @@ static int usock_inet(int type, const char *host, const char *service, int sockt
                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);
+               sock = usock_connect(type, rp->ai_addr, rp->ai_addrlen, rp->ai_family, socktype, server);
                if (sock >= 0)
                        break;
        }
@@ -120,13 +123,38 @@ int usock(int type, const char *host, const char *service) {
        int sock;
 
        if (type & USOCK_UNIX)
-               sock = usock_unix(host, socktype, server);
+               sock = usock_unix(type, host, socktype, server);
        else
                sock = usock_inet(type, host, service, socktype, server);
 
        if (sock < 0)
                return -1;
 
-       usock_set_flags(sock, type);
        return sock;
 }
+
+int usock_wait_ready(int fd, int msecs) {
+       struct pollfd fds[1];
+       int res;
+
+       fds[0].fd = fd;
+       fds[0].events = POLLOUT;
+
+       res = poll(fds, 1, msecs);
+       if (res < 0) {
+               return errno;
+       } else if (res == 0) {
+               return -ETIMEDOUT;
+       } else {
+               int err = 0;
+               socklen_t optlen = sizeof(err);
+
+               res = getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &optlen);
+               if (res)
+                       return errno;
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}