/*
* Open the UNIX domain socket
*
* Returns the file descriptor if successful, or -1 if failed
*/
static twopence_sock_t *
__twopence_virtio_open(struct twopence_pipe_target *pipe_handle)
{
struct twopence_virtio_target *handle = (struct twopence_virtio_target *) pipe_handle;
int socket_fd;
// Create the file descriptor
socket_fd = socket(PF_LOCAL, SOCK_STREAM, AF_UNIX);
if (socket_fd <= 0)
return NULL;
// Open the connection
if (connect(socket_fd,
(const struct sockaddr *) &handle->address,
sizeof(struct sockaddr_un)))
{
close(socket_fd);
return NULL;
}
/* Note, we do not pass O_NONBLOCK here, but we do set O_CLOEXEC */
return twopence_sock_new_flags(socket_fd, O_RDWR | O_CLOEXEC);
}
/*
* Open the TCP socket
*
* Returns the file descriptor if successful, or -1 if failed
*/
static twopence_sock_t *
__twopence_tcp_open(struct twopence_pipe_target *pipe_handle)
{
struct twopence_tcp_target *handle = (struct twopence_tcp_target *) pipe_handle;
char *copy, *hostname, *portname = NULL;
struct addrinfo hints;
struct addrinfo *ai_list, *ai;
int socket_fd = -1;
int res;
copy = hostname = twopence_strdup(handle->server_spec);
if (hostname[0] == '[') {
/* Something like [::1] */
char *s;
for (s = ++hostname; *s != ']'; ++s) {
if (*s == '\0') {
twopence_log_error("tcp: cannot parse \"%s\"", handle->server_spec);
free(copy);
return NULL;
}
}
*s++ = '\0';
if (*s == ':')
portname = ++s;
/* Any other garbage is silently ignored for now */
} else
if ((portname = strchr(hostname, ':')) != NULL)
*portname++ = '\0';
if (portname == NULL)
portname = TWOPENCE_TCP_PORT_DEFAULT_STR;
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
res = getaddrinfo(hostname, portname, &hints, &ai_list);
free(copy);
copy = hostname = portname = NULL;
if (res != 0) {
twopence_log_error("tcp: cannot resolve \"%s\": %s", handle->server_spec, gai_strerror(res));
return NULL;
}
twopence_debug("trying to open connection to %s", handle->server_spec);
for (ai = ai_list; ai && socket_fd < 0; ai = ai->ai_next) {
socket_fd = socket(ai->ai_family, SOCK_STREAM, 0);
if (socket_fd <= 0)
break;
// Open the connection
if (connect(socket_fd, ai->ai_addr, ai->ai_addrlen) < 0) {
/* Okay, this address didn't work. Try the next one */
close(socket_fd);
socket_fd = -1;
}
}
freeaddrinfo(ai_list);
if (socket_fd <= 0)
return NULL;
/* Note, we do not pass O_NONBLOCK here, but we do set O_CLOEXEC */
return twopence_sock_new_flags(socket_fd, O_RDWR | O_CLOEXEC);
}