/**************************************************************************
Get ready to [try to] connect to a server:
- translate HOSTNAME and PORT (with defaults of "localhost" and
DEFAULT_SOCK_PORT respectively) to a raw IP address and port number, and
store them in the `names' variable
- return 0 on success
or put an error message in ERRBUF and return -1 on failure
**************************************************************************/
static int get_server_address(const char *hostname, int port,
char *errbuf, int errbufsize)
{
if (port == 0)
port = DEFAULT_SOCK_PORT;
/* use name to find TCP/IP address of server */
if (!hostname)
hostname = "localhost";
if (!net_lookup_service(hostname, port, &names[0], FALSE)) {
(void) fc_strlcpy(errbuf, _("Failed looking up host."), errbufsize);
return -1;
}
name_count = 1;
#ifdef IPV6_SUPPORT
if (names[0].saddr.sa_family == AF_INET6) {
/* net_lookup_service() prefers IPv6 address.
* Check if there is also IPv4 address.
* TODO: This would be easier using getaddrinfo() */
if (net_lookup_service(hostname, port,
&names[1], TRUE /* force IPv4 */)) {
name_count = 2;
}
}
#endif
return 0;
}
/**************************************************************************
Get ready to [try to] connect to a server:
- translate HOSTNAME and PORT (with defaults of "localhost" and
DEFAULT_SOCK_PORT respectively) to a raw IP address and port number, and
store them in the `server_addr' variable
- return 0 on success
or put an error message in ERRBUF and return -1 on failure
**************************************************************************/
static int get_server_address(const char *hostname, int port,
char *errbuf, int errbufsize)
{
if (port == 0)
port = DEFAULT_SOCK_PORT;
/* use name to find TCP/IP address of server */
if (!hostname)
hostname = "localhost";
if (!net_lookup_service(hostname, port, &server_addr, FALSE)) {
(void) mystrlcpy(errbuf, _("Failed looking up host."), errbufsize);
return -1;
}
return 0;
}
/****************************************************************************
Begin a metaserver scan for servers. This just initiates the connection
to the metaserver; later get_meta_server_list should be called whenever
the socket has data pending to read and parse it.
Returns FALSE on error (in which case errbuf will contain an error
message).
****************************************************************************/
static bool begin_metaserver_scan(struct server_scan *scan)
{
union fc_sockaddr addr;
int s;
scan->meta.urlpath = fc_lookup_httpd(scan->meta.name, &scan->meta.port,
metaserver);
if (!scan->meta.urlpath) {
scan->error_func(scan,
_("Invalid $http_proxy or metaserver value, must "
"start with 'http://'"));
return FALSE;
}
if (!net_lookup_service(scan->meta.name, scan->meta.port, &addr, FALSE)) {
scan->error_func(scan, _("Failed looking up metaserver's host"));
return FALSE;
}
if ((s = socket(addr.saddr.sa_family, SOCK_STREAM, 0)) == -1) {
scan->error_func(scan, fc_strerror(fc_get_errno()));
return FALSE;
}
fc_nonblock(s);
if (fc_connect(s, &addr.saddr, sockaddr_size(&addr)) == -1) {
if (errno == EINPROGRESS) {
/* With non-blocking sockets this is the expected result. */
scan->meta.state = META_CONNECTING;
scan->sock = s;
} else {
fc_closesocket(s);
scan->error_func(scan, fc_strerror(fc_get_errno()));
return FALSE;
}
} else {
/* Instant connection? Whoa. */
scan->sock = s;
scan->meta.state = META_CONNECTING;
meta_send_request(scan);
}
return TRUE;
}
