/*
* start_auth_query - Flag the client to show that an attempt to
* contact the ident server on the client's host. The connect and
* subsequently the socket are all put into 'non-blocking' mode.
* Should the connect or any later phase of the identifing process fail,
* it is aborted and the user is given a username of "unknown".
*/
static int start_auth_query(struct AuthRequest* auth)
{
struct sockaddr_in remote_addr;
struct sockaddr_in local_addr;
int fd;
IOResult result;
assert(0 != auth);
assert(0 != auth->client);
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
++ServerStats->is_abad;
return 0;
}
if ((MAXCONNECTIONS - 10) < fd) {
close(fd);
return 0;
}
if (!os_set_nonblocking(fd)) {
close(fd);
return 0;
}
if (IsUserPort(auth->client))
sendheader(auth->client, REPORT_DO_ID);
/*
* get the local address of the client and bind to that to
* make the auth request. This used to be done only for
* ifdef VIRTTUAL_HOST, but needs to be done for all clients
* since the ident request must originate from that same address--
* and machines with multiple IP addresses are common now
*/
memset(&local_addr, 0, sizeof(struct sockaddr_in));
os_get_sockname(cli_fd(auth->client), &local_addr);
local_addr.sin_port = htons(0);
if (bind(fd, (struct sockaddr*) &local_addr, sizeof(struct sockaddr_in))) {
close(fd);
return 0;
}
remote_addr.sin_addr.s_addr = (cli_ip(auth->client)).s_addr;
remote_addr.sin_port = htons(113);
remote_addr.sin_family = AF_INET;
if ((result = os_connect_nonb(fd, &remote_addr)) == IO_FAILURE ||
!socket_add(&auth->socket, auth_sock_callback, (void*) auth,
result == IO_SUCCESS ? SS_CONNECTED : SS_CONNECTING,
SOCK_EVENT_READABLE, fd)) {
ServerStats->is_abad++;
/*
* No error report from this...
*/
close(fd);
if (IsUserPort(auth->client))
sendheader(auth->client, REPORT_FAIL_ID);
return 0;
}
auth->flags |= AM_SOCKET;
auth->fd = fd;
SetAuthConnect(auth);
if (result == IO_SUCCESS)
send_auth_query(auth); /* this does a SetAuthPending(auth) for us */
return 1;
}
/** Set up address and port and make a connection.
* @param aconf Provides the connection information.
* @param cptr Client structure for the peer.
* @return Non-zero on success; zero on failure.
*/
static int connect_inet(struct ConfItem* aconf, struct Client* cptr)
{
const struct irc_sockaddr *local;
IOResult result;
int family = 0;
assert(0 != aconf);
assert(0 != cptr);
/*
* Might as well get sockhost from here, the connection is attempted
* with it so if it fails its useless.
*/
if (irc_in_addr_valid(&aconf->origin.addr))
local = &aconf->origin;
else if (irc_in_addr_is_ipv4(&aconf->address.addr)) {
local = &VirtualHost_v4;
family = AF_INET;
} else
local = &VirtualHost_v6;
cli_fd(cptr) = os_socket(local, SOCK_STREAM, cli_name(cptr), family);
if (cli_fd(cptr) < 0)
return 0;
/*
* save connection info in client
*/
memcpy(&cli_ip(cptr), &aconf->address.addr, sizeof(cli_ip(cptr)));
ircd_ntoa_r(cli_sock_ip(cptr), &cli_ip(cptr));
/*
* we want a big buffer for server connections
*/
if (!os_set_sockbufs(cli_fd(cptr), feature_int(FEAT_SOCKSENDBUF), feature_int(FEAT_SOCKRECVBUF))) {
cli_error(cptr) = errno;
report_error(SETBUFS_ERROR_MSG, cli_name(cptr), errno);
close(cli_fd(cptr));
cli_fd(cptr) = -1;
return 0;
}
/*
* Set the TOS bits - this is nonfatal if it doesn't stick.
*/
if (!os_set_tos(cli_fd(cptr), feature_int(FEAT_TOS_SERVER))) {
report_error(TOS_ERROR_MSG, cli_name(cptr), errno);
}
if ((result = os_connect_nonb(cli_fd(cptr), &aconf->address)) == IO_FAILURE) {
cli_error(cptr) = errno;
report_error(CONNECT_ERROR_MSG, cli_name(cptr), errno);
close(cli_fd(cptr));
cli_fd(cptr) = -1;
return 0;
}
if (!socket_add(&(cli_socket(cptr)), client_sock_callback,
(void*) cli_connect(cptr),
(result == IO_SUCCESS) ? SS_CONNECTED : SS_CONNECTING,
SOCK_EVENT_READABLE, cli_fd(cptr))) {
cli_error(cptr) = ENFILE;
report_error(REGISTER_ERROR_MSG, cli_name(cptr), ENFILE);
close(cli_fd(cptr));
cli_fd(cptr) = -1;
return 0;
}
cli_freeflag(cptr) |= FREEFLAG_SOCKET;
return 1;
}
