+
+ 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);