+/*
+ * usock - socket helper functions
+ *
+ * Copyright (C) 2010 Steven Barth <steven@midlink.org>
+ * Copyright (C) 2011-2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netdb.h>
+#include <poll.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <stdbool.h>
+#include <stdio.h>
#include "usock.h"
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;
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));
return -1;
}
-static int usock_unix(const char *host, int socktype, bool server)
+static int usock_unix(int type, const char *host)
{
struct sockaddr_un sun = {.sun_family = AF_UNIX};
+ bool server = !!(type & USOCK_SERVER);
+ int socktype = ((type & 0xff) == USOCK_TCP) ? SOCK_STREAM : SOCK_DGRAM;
if (strlen(host) >= sizeof(sun.sun_path)) {
errno = EINVAL;
}
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)
+int usock_inet(int type, const char *host, const char *service, void *addr)
{
+ int socktype = ((type & 0xff) == USOCK_TCP) ? SOCK_STREAM : SOCK_DGRAM;
+ bool server = !!(type & USOCK_SERVER);
struct addrinfo *result, *rp;
struct addrinfo hints = {
.ai_family = (type & USOCK_IPV6ONLY) ? AF_INET6 :
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)
+ sock = usock_connect(type, rp->ai_addr, rp->ai_addrlen, rp->ai_family, socktype, server);
+ if (sock >= 0) {
+ if (addr)
+ memcpy(addr, rp->ai_addr, rp->ai_addrlen);
break;
+ }
}
freeaddrinfo(result);
return sock;
}
+const char *usock_port(int port)
+{
+ static char buffer[sizeof("65535\0")];
+
+ if (port < 0 || port > 65535)
+ return NULL;
+
+ snprintf(buffer, sizeof(buffer), "%u", port);
+
+ return buffer;
+}
+
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);
+ sock = usock_unix(type, host);
else
- sock = usock_inet(type, host, service, socktype, server);
+ sock = usock_inet(type, host, service, NULL);
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;
+}