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#include "bitlbee.h"
#include "lib/http_client.h"
#include "msn.h"
#define GATEWAY_HOST "geo.gateway.messenger.live.com"
#define GATEWAY_PORT 443
#define REQUEST_TEMPLATE \
"POST /gateway/gateway.dll?SessionID=%s&%s HTTP/1.1\r\n" \
"Host: %s\r\n" \
"Content-Length: %zd\r\n" \
"\r\n" \
"%s"
static gboolean msn_gw_poll_timeout(gpointer data, gint source, b_input_condition cond);
struct msn_gw *msn_gw_new(struct im_connection *ic)
{
struct msn_gw *gw = g_new0(struct msn_gw, 1);
gw->last_host = g_strdup(GATEWAY_HOST);
gw->port = GATEWAY_PORT;
gw->ssl = (GATEWAY_PORT == 443);
gw->poll_timeout = -1;
gw->write_timeout = -1;
gw->ic = ic;
gw->md = ic->proto_data;
gw->in = g_byte_array_new();
gw->out = g_byte_array_new();
return gw;
}
void msn_gw_free(struct msn_gw *gw)
{
if (gw->poll_timeout != -1) {
b_event_remove(gw->poll_timeout);
}
if (gw->write_timeout != -1) {
b_event_remove(gw->write_timeout);
}
g_byte_array_free(gw->in, TRUE);
g_byte_array_free(gw->out, TRUE);
g_free(gw->session_id);
g_free(gw->last_host);
g_free(gw);
}
static struct msn_gw *msn_gw_from_ic(struct im_connection *ic)
{
if (g_slist_find(msn_connections, ic) == NULL) {
return NULL;
} else {
struct msn_data *md = ic->proto_data;
return md->gw;
}
}
static gboolean msn_gw_parse_session_header(struct msn_gw *gw, char *value)
{
int i;
char **subvalues;
gboolean closed = FALSE;
subvalues = g_strsplit(value, "; ", 0);
for (i = 0; subvalues[i]; i++) {
if (strcmp(subvalues[i], "Session=close") == 0) {
/* gateway closed, signal the death of the socket */
closed = TRUE;
} else if (g_str_has_prefix(subvalues[i], "SessionID=")) {
/* copy the part after the = to session_id*/
g_free(gw->session_id);
gw->session_id = g_strdup(subvalues[i] + 10);
}
}
g_strfreev(subvalues);
return !closed;
}
void msn_gw_callback(struct http_request *req)
{
struct msn_gw *gw;
char *value;
if (!(gw = msn_gw_from_ic(req->data))) {
return;
}
gw->waiting = FALSE;
gw->polling = FALSE;
if (req->status_code != 200 || !req->reply_body) {
gw->callback(gw->md, -1, B_EV_IO_READ);
return;
}
if (getenv("BITLBEE_DEBUG")) {
fprintf(stderr, "\n\x1b[90mHTTP:%s\n", req->reply_body);
fprintf(stderr, "\n\x1b[97m\n");
}
if ((value = get_rfc822_header(req->reply_headers, "X-MSN-Messenger", 0))) {
if (!msn_gw_parse_session_header(gw, value)) {
gw->callback(gw->md, -1, B_EV_IO_READ);
g_free(value);
return;
}
g_free(value);
}
if ((value = get_rfc822_header(req->reply_headers, "X-MSN-Host", 0))) {
g_free(gw->last_host);
gw->last_host = value; /* transfer */
}
if (req->body_size) {
g_byte_array_append(gw->in, (const guint8 *) req->reply_body, req->body_size);
if (!gw->callback(gw->md, -1, B_EV_IO_READ)) {
return;
}
}
if (gw->poll_timeout != -1) {
b_event_remove(gw->poll_timeout);
}
gw->poll_timeout = b_timeout_add(500, msn_gw_poll_timeout, gw->ic);
}
void msn_gw_dorequest(struct msn_gw *gw, char *args)
{
char *request = NULL;
char *body = NULL;
size_t bodylen = 0;
if (gw->out) {
bodylen = gw->out->len;
g_byte_array_append(gw->out, (guint8 *) "", 1); /* nullnullnull */
body = (char *) g_byte_array_free(gw->out, FALSE);
gw->out = g_byte_array_new();
}
if (!bodylen && !args) {
args = "Action=poll&Lifespan=60";
gw->polling = TRUE;
}
request = g_strdup_printf(REQUEST_TEMPLATE,
gw->session_id ? : "", args ? : "", gw->last_host, bodylen, body ? : "");
http_dorequest(gw->last_host, gw->port, gw->ssl, request, msn_gw_callback, gw->ic);
gw->open = TRUE;
gw->waiting = TRUE;
g_free(body);
g_free(request);
}
void msn_gw_open(struct msn_gw *gw)
{
msn_gw_dorequest(gw, "Action=open&Server=NS");
}
static gboolean msn_gw_poll_timeout(gpointer data, gint source, b_input_condition cond)
{
struct msn_gw *gw;
if (!(gw = msn_gw_from_ic(data))) {
return FALSE;
}
gw->poll_timeout = -1;
if (!gw->waiting) {
msn_gw_dorequest(gw, NULL);
}
return FALSE;
}
ssize_t msn_gw_read(struct msn_gw *gw, char **buf)
{
size_t bodylen;
if (!gw->open) {
return 0;
}
bodylen = gw->in->len;
g_byte_array_append(gw->in, (guint8 *) "", 1); /* nullnullnull */
*buf = (char *) g_byte_array_free(gw->in, FALSE);
gw->in = g_byte_array_new();
return bodylen;
}
static gboolean msn_gw_write_cb(gpointer data, gint source, b_input_condition cond)
{
struct msn_gw *gw;
if (!(gw = msn_gw_from_ic(data))) {
return FALSE;
}
if (!gw->open) {
msn_gw_open(gw);
} else if (gw->polling || !gw->waiting) {
msn_gw_dorequest(gw, NULL);
}
gw->write_timeout = -1;
return FALSE;
}
void msn_gw_write(struct msn_gw *gw, char *buf, size_t len)
{
g_byte_array_append(gw->out, (const guint8 *) buf, len);
/* do a bit of buffering here to send several commands with a single request */
if (gw->write_timeout == -1) {
gw->write_timeout = b_timeout_add(1, msn_gw_write_cb, gw->ic);
}
}
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