source: protocols/msn/ns.c @ 1522faf

/********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2012 Wilmer van der Gaast and others                *
  \********************************************************************/

/* MSN module - Notification server callbacks                           */

/*
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License with
  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  if not, write to the Free Software Foundation, Inc., 51 Franklin St.,
  Fifth Floor, Boston, MA  02110-1301  USA
*/

#include <ctype.h>
#include <sys/utsname.h>
#include "nogaim.h"
#include "msn.h"
#include "md5.h"
#include "sha1.h"
#include "soap.h"
#include "xmltree.h"

static gboolean msn_ns_connected(gpointer data, gint source, b_input_condition cond);
static gboolean msn_ns_callback(gpointer data, gint source, b_input_condition cond);
static int msn_ns_command(struct msn_handler_data *handler, char **cmd, int num_parts);
static int msn_ns_message(struct msn_handler_data *handler, char *msg, int msglen, char **cmd, int num_parts);

static void msn_ns_send_adl_start(struct im_connection *ic);
static void msn_ns_send_adl(struct im_connection *ic);

int msn_ns_write(struct im_connection *ic, int fd, const char *fmt, ...)
{
        struct msn_data *md = ic->proto_data;
        va_list params;
        char *out;
        size_t len;
        int st;

        va_start(params, fmt);
        out = g_strdup_vprintf(fmt, params);
        va_end(params);

        if (fd < 0) {
                fd = md->ns->fd;
        }

        if (getenv("BITLBEE_DEBUG")) {
                fprintf(stderr, "->NS%d:%s\n", fd, out);
        }

        len = strlen(out);
        st = write(fd, out, len);
        g_free(out);
        if (st != len) {
                imcb_error(ic, "Short write() to main server");
                imc_logout(ic, TRUE);
                return 0;
        }

        return 1;
}

gboolean msn_ns_connect(struct im_connection *ic, struct msn_handler_data *handler, const char *host, int port)
{
        if (handler->fd >= 0) {
                closesocket(handler->fd);
        }

        handler->exec_command = msn_ns_command;
        handler->exec_message = msn_ns_message;
        handler->data = ic;
        handler->fd = proxy_connect(host, port, msn_ns_connected, handler);
        if (handler->fd < 0) {
                imcb_error(ic, "Could not connect to server");
                imc_logout(ic, TRUE);
                return FALSE;
        }

        return TRUE;
}

static gboolean msn_ns_connected(gpointer data, gint source, b_input_condition cond)
{
        struct msn_handler_data *handler = data;
        struct im_connection *ic = handler->data;
        struct msn_data *md;

        if (!g_slist_find(msn_connections, ic)) {
                return FALSE;
        }

        md = ic->proto_data;

        if (source == -1) {
                imcb_error(ic, "Could not connect to server");
                imc_logout(ic, TRUE);
                return FALSE;
        }

        g_free(handler->rxq);
        handler->rxlen = 0;
        handler->rxq = g_new0(char, 1);

        if (md->uuid == NULL) {
                struct utsname name;
                sha1_state_t sha[1];

                /* UUID == SHA1("BitlBee" + my hostname + MSN username) */
                sha1_init(sha);
                sha1_append(sha, (void *) "BitlBee", 7);
                if (uname(&name) == 0) {
                        sha1_append(sha, (void *) name.nodename, strlen(name.nodename));
                }
                sha1_append(sha, (void *) ic->acc->user, strlen(ic->acc->user));
                md->uuid = sha1_random_uuid(sha);
                memcpy(md->uuid, "b171be3e", 8);   /* :-P */
        }

        if (msn_ns_write(ic, source, "VER %d %s CVR0\r\n", ++md->trId, MSNP_VER)) {
                handler->inpa = b_input_add(handler->fd, B_EV_IO_READ, msn_ns_callback, handler);
                imcb_log(ic, "Connected to server, waiting for reply");
        }

        return FALSE;
}

void msn_ns_close(struct msn_handler_data *handler)
{
        if (handler->fd >= 0) {
                closesocket(handler->fd);
                b_event_remove(handler->inpa);
        }

        handler->fd = handler->inpa = -1;
        g_free(handler->rxq);
        g_free(handler->cmd_text);

        handler->rxlen = 0;
        handler->rxq = NULL;
        handler->cmd_text = NULL;
}

static gboolean msn_ns_callback(gpointer data, gint source, b_input_condition cond)
{
        struct msn_handler_data *handler = data;
        struct im_connection *ic = handler->data;

        if (msn_handler(handler) == -1) {  /* Don't do this on ret == 0, it's already done then. */
                imcb_error(ic, "Error while reading from server");
                imc_logout(ic, TRUE);

                return FALSE;
        } else {
                return TRUE;
        }
}

static int msn_ns_command(struct msn_handler_data *handler, char **cmd, int num_parts)
{
        struct im_connection *ic = handler->data;
        struct msn_data *md = ic->proto_data;

        if (num_parts == 0) {
                /* Hrrm... Empty command...? Ignore? */
                return(1);
        }

        if (strcmp(cmd[0], "VER") == 0) {
                if (cmd[2] && strncmp(cmd[2], MSNP_VER, 5) != 0) {
                        imcb_error(ic, "Unsupported protocol");
                        imc_logout(ic, FALSE);
                        return(0);
                }

                return(msn_ns_write(ic, handler->fd, "CVR %d 0x0409 mac 10.2.0 ppc macmsgs 3.5.1 macmsgs %s\r\n",
                                    ++md->trId, ic->acc->user));
        } else if (strcmp(cmd[0], "CVR") == 0) {
                /* We don't give a damn about the information we just received */
                return msn_ns_write(ic, handler->fd, "USR %d SSO I %s\r\n", ++md->trId, ic->acc->user);
        } else if (strcmp(cmd[0], "XFR") == 0) {
                char *server;
                int port;

                if (num_parts >= 6 && strcmp(cmd[2], "NS") == 0) {
                        b_event_remove(handler->inpa);
                        handler->inpa = -1;

                        server = strchr(cmd[3], ':');
                        if (!server) {
                                imcb_error(ic, "Syntax error");
                                imc_logout(ic, TRUE);
                                return(0);
                        }
                        *server = 0;
                        port = atoi(server + 1);
                        server = cmd[3];

                        imcb_log(ic, "Transferring to other server");
                        return msn_ns_connect(ic, handler, server, port);
                } else if (num_parts >= 6 && strcmp(cmd[2], "SB") == 0) {
                        struct msn_switchboard *sb;

                        server = strchr(cmd[3], ':');
                        if (!server) {
                                imcb_error(ic, "Syntax error");
                                imc_logout(ic, TRUE);
                                return(0);
                        }
                        *server = 0;
                        port = atoi(server + 1);
                        server = cmd[3];

                        if (strcmp(cmd[4], "CKI") != 0) {
                                imcb_error(ic, "Unknown authentication method for switchboard");
                                imc_logout(ic, TRUE);
                                return(0);
                        }

                        debug("Connecting to a new switchboard with key %s", cmd[5]);

                        if ((sb = msn_sb_create(ic, server, port, cmd[5], MSN_SB_NEW)) == NULL) {
                                /* Although this isn't strictly fatal for the NS connection, it's
                                   definitely something serious (we ran out of file descriptors?). */
                                imcb_error(ic, "Could not create new switchboard");
                                imc_logout(ic, TRUE);
                                return(0);
                        }

                        if (md->msgq) {
                                struct msn_message *m = md->msgq->data;
                                GSList *l;

                                sb->who = g_strdup(m->who);

                                /* Move all the messages to the first user in the message
                                   queue to the switchboard message queue. */
                                l = md->msgq;
                                while (l) {
                                        m = l->data;
                                        l = l->next;
                                        if (strcmp(m->who, sb->who) == 0) {
                                                sb->msgq = g_slist_append(sb->msgq, m);
                                                md->msgq = g_slist_remove(md->msgq, m);
                                        }
                                }
                        }
                } else {
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return(0);
                }
        } else if (strcmp(cmd[0], "USR") == 0) {
                if (num_parts >= 6 && strcmp(cmd[2], "SSO") == 0 &&
                    strcmp(cmd[3], "S") == 0) {
                        g_free(md->pp_policy);
                        md->pp_policy = g_strdup(cmd[4]);
                        msn_soap_passport_sso_request(ic, cmd[5]);
                } else if (strcmp(cmd[2], "OK") == 0) {
                        /* If the number after the handle is 0, the e-mail
                           address is unverified, which means we can't change
                           the display name. */
                        if (cmd[4][0] == '0') {
                                md->flags |= MSN_EMAIL_UNVERIFIED;
                        }

                        imcb_log(ic, "Authenticated, getting buddy list");
                        msn_soap_memlist_request(ic);
                } else {
                        imcb_error(ic, "Unknown authentication type");
                        imc_logout(ic, FALSE);
                        return(0);
                }
        } else if (strcmp(cmd[0], "MSG") == 0) {
                if (num_parts < 4) {
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return(0);
                }

                handler->msglen = atoi(cmd[3]);

                if (handler->msglen <= 0) {
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return(0);
                }
        } else if (strcmp(cmd[0], "BLP") == 0) {
                msn_ns_send_adl_start(ic);
                return msn_ns_finish_login(ic);
        } else if (strcmp(cmd[0], "ADL") == 0) {
                if (num_parts >= 3 && strcmp(cmd[2], "OK") == 0) {
                        msn_ns_send_adl(ic);
                        return msn_ns_finish_login(ic);
                } else if (num_parts >= 3) {
                        handler->msglen = atoi(cmd[2]);
                }
        } else if (strcmp(cmd[0], "PRP") == 0) {
                imcb_connected(ic);
        } else if (strcmp(cmd[0], "CHL") == 0) {
                char *resp;
                int st;

                if (num_parts < 3) {
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return(0);
                }

                resp = msn_p11_challenge(cmd[2]);

                st =  msn_ns_write(ic, -1, "QRY %d %s %zd\r\n%s",
                                   ++md->trId, MSNP11_PROD_ID,
                                   strlen(resp), resp);
                g_free(resp);
                return st;
        } else if (strcmp(cmd[0], "ILN") == 0 || strcmp(cmd[0], "NLN") == 0) {
                const struct msn_away_state *st;
                const char *handle;
                int cap = 0;

                if (num_parts < 6) {
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return(0);
                }
                /* ILN and NLN are more or less the same, except ILN has a trId
                   at the start, and NLN has a capability field at the end.
                   Does ILN still exist BTW? */
                if (cmd[0][1] == 'I') {
                        cmd++;
                } else {
                        cap = atoi(cmd[4]);
                }

                handle = msn_normalize_handle(cmd[2]);
                if (strcmp(handle, ic->acc->user) == 0) {
                        return 1; /* That's me! */

                }
                http_decode(cmd[3]);
                imcb_rename_buddy(ic, handle, cmd[3]);

                st = msn_away_state_by_code(cmd[1]);
                if (!st) {
                        /* FIXME: Warn/Bomb about unknown away state? */
                        st = msn_away_state_list + 1;
                }

                imcb_buddy_status(ic, handle, OPT_LOGGED_IN |
                                  (st != msn_away_state_list ? OPT_AWAY : 0) |
                                  (cap & 1 ? OPT_MOBILE : 0),
                                  st->name, NULL);

                msn_sb_stop_keepalives(msn_sb_by_handle(ic, handle));
        } else if (strcmp(cmd[0], "FLN") == 0) {
                const char *handle;

                if (cmd[1] == NULL) {
                        return 1;
                }

                handle = msn_normalize_handle(cmd[1]);
                imcb_buddy_status(ic, handle, 0, NULL, NULL);
                msn_sb_start_keepalives(msn_sb_by_handle(ic, handle), TRUE);
        } else if (strcmp(cmd[0], "RNG") == 0) {
                struct msn_switchboard *sb;
                char *server;
                int session, port;

                if (num_parts < 7) {
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return(0);
                }

                session = atoi(cmd[1]);

                server = strchr(cmd[2], ':');
                if (!server) {
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return(0);
                }
                *server = 0;
                port = atoi(server + 1);
                server = cmd[2];

                if (strcmp(cmd[3], "CKI") != 0) {
                        imcb_error(ic, "Unknown authentication method for switchboard");
                        imc_logout(ic, TRUE);
                        return(0);
                }

                debug("Got a call from %s (session %d). Key = %s", cmd[5], session, cmd[4]);

                if ((sb = msn_sb_create(ic, server, port, cmd[4], session)) == NULL) {
                        /* Although this isn't strictly fatal for the NS connection, it's
                           definitely something serious (we ran out of file descriptors?). */
                        imcb_error(ic, "Could not create new switchboard");
                        imc_logout(ic, TRUE);
                        return(0);
                } else {
                        sb->who = g_strdup(msn_normalize_handle(cmd[5]));
                }
        } else if (strcmp(cmd[0], "OUT") == 0) {
                int allow_reconnect = TRUE;

                if (cmd[1] && strcmp(cmd[1], "OTH") == 0) {
                        imcb_error(ic, "Someone else logged in with your account");
                        allow_reconnect = FALSE;
                } else if (cmd[1] && strcmp(cmd[1], "SSD") == 0) {
                        imcb_error(ic, "Terminating session because of server shutdown");
                } else {
                        imcb_error(ic, "Session terminated by remote server (%s)",
                                   cmd[1] ? cmd[1] : "reason unknown)");
                }

                imc_logout(ic, allow_reconnect);
                return(0);
        } else if (strcmp(cmd[0], "IPG") == 0) {
                imcb_error(ic, "Received IPG command, we don't handle them yet.");

                handler->msglen = atoi(cmd[1]);

                if (handler->msglen <= 0) {
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return(0);
                }
        }
#if 0
        else if (strcmp(cmd[0], "ADG") == 0) {
                char *group = g_strdup(cmd[3]);
                int groupnum, i;
                GSList *l, *next;

                http_decode(group);
                if (sscanf(cmd[4], "%d", &groupnum) == 1) {
                        if (groupnum >= md->groupcount) {
                                md->grouplist = g_renew(char *, md->grouplist, groupnum + 1);
                                for (i = md->groupcount; i <= groupnum; i++) {
                                        md->grouplist[i] = NULL;
                                }
                                md->groupcount = groupnum + 1;
                        }
                        g_free(md->grouplist[groupnum]);
                        md->grouplist[groupnum] = group;
                } else {
                        /* Shouldn't happen, but if it does, give up on the group. */
                        g_free(group);
                        imcb_error(ic, "Syntax error");
                        imc_logout(ic, TRUE);
                        return 0;
                }

                for (l = md->grpq; l; l = next) {
                        struct msn_groupadd *ga = l->data;
                        next = l->next;
                        if (g_strcasecmp(ga->group, group) == 0) {
                                if (!msn_buddy_list_add(ic, "FL", ga->who, ga->who, group)) {
                                        return 0;
                                }

                                g_free(ga->group);
                                g_free(ga->who);
                                g_free(ga);
                                md->grpq = g_slist_remove(md->grpq, ga);
                        }
                }
        }
#endif
        else if (strcmp(cmd[0], "GCF") == 0) {
                /* Coming up is cmd[2] bytes of stuff we're supposed to
                   censore. Meh. */
                handler->msglen = atoi(cmd[2]);
        } else if (strcmp(cmd[0], "UBX") == 0) {
                /* Status message. */
                if (num_parts >= 3) {
                        handler->msglen = atoi(cmd[2]);
                }
        } else if (strcmp(cmd[0], "NOT") == 0) {
                /* Some kind of notification, poorly documented but
                   apparently used to announce address book changes. */
                if (num_parts >= 2) {
                        handler->msglen = atoi(cmd[1]);
                }
        } else if (strcmp(cmd[0], "UBM") == 0) {
                if (num_parts >= 7) {
                        handler->msglen = atoi(cmd[6]);
                }
        } else if (strcmp(cmd[0], "QNG") == 0) {
                ic->flags |= OPT_PONGED;
        } else if (g_ascii_isdigit(cmd[0][0])) {
                int num = atoi(cmd[0]);
                const struct msn_status_code *err = msn_status_by_number(num);

                imcb_error(ic, "Error reported by MSN server: %s", err->text);

                if (err->flags & STATUS_FATAL) {
                        imc_logout(ic, TRUE);
                        return(0);
                }

                /* Oh yes, errors can have payloads too now. Discard them for now. */
                if (num_parts >= 3) {
                        handler->msglen = atoi(cmd[2]);
                }
        } else {
                /* debug( "Received unknown command from main server: %s", cmd[0] ); */
        }

        return(1);
}

static int msn_ns_message(struct msn_handler_data *handler, char *msg, int msglen, char **cmd, int num_parts)
{
        struct im_connection *ic = handler->data;
        char *body;
        int blen = 0;

        if (!num_parts) {
                return(1);
        }

        if ((body = strstr(msg, "\r\n\r\n"))) {
                body += 4;
                blen = msglen - (body - msg);
        }

        if (strcmp(cmd[0], "MSG") == 0) {
                if (g_strcasecmp(cmd[1], "Hotmail") == 0) {
                        char *ct = get_rfc822_header(msg, "Content-Type:", msglen);

                        if (!ct) {
                                return(1);
                        }

                        if (g_strncasecmp(ct, "application/x-msmsgssystemmessage", 33) == 0) {
                                char *mtype;
                                char *arg1;

                                if (!body) {
                                        return(1);
                                }

                                mtype = get_rfc822_header(body, "Type:", blen);
                                arg1 = get_rfc822_header(body, "Arg1:", blen);

                                if (mtype && strcmp(mtype, "1") == 0) {
                                        if (arg1) {
                                                imcb_log(ic, "The server is going down for maintenance in %s minutes.",
                                                         arg1);
                                        }
                                }

                                g_free(arg1);
                                g_free(mtype);
                        } else if (g_strncasecmp(ct, "text/x-msmsgsprofile", 20) == 0) {
                                /* We don't care about this profile for now... */
                        } else if (g_strncasecmp(ct, "text/x-msmsgsinitialemailnotification", 37) == 0) {
                                if (set_getbool(&ic->acc->set, "mail_notifications")) {
                                        char *inbox = get_rfc822_header(body, "Inbox-Unread:", blen);
                                        char *folders = get_rfc822_header(body, "Folders-Unread:", blen);

                                        if (inbox && folders) {
                                                imcb_log(ic,
                                                         "INBOX contains %s new messages, plus %s messages in other folders.", inbox,
                                                         folders);
                                        }

                                        g_free(inbox);
                                        g_free(folders);
                                }
                        } else if (g_strncasecmp(ct, "text/x-msmsgsemailnotification", 30) == 0) {
                                if (set_getbool(&ic->acc->set, "mail_notifications")) {
                                        char *from = get_rfc822_header(body, "From-Addr:", blen);
                                        char *fromname = get_rfc822_header(body, "From:", blen);

                                        if (from && fromname) {
                                                imcb_log(ic, "Received an e-mail message from %s <%s>.", fromname,
                                                         from);
                                        }

                                        g_free(from);
                                        g_free(fromname);
                                }
                        } else if (g_strncasecmp(ct, "text/x-msmsgsactivemailnotification", 35) == 0) {
                        } else if (g_strncasecmp(ct, "text/x-msmsgsinitialmdatanotification", 37) == 0 ||
                                   g_strncasecmp(ct, "text/x-msmsgsoimnotification", 28) == 0) {
                                /* We received an offline message. Or at least notification
                                   that there is one waiting for us. Fetching the message(s)
                                   and purging them from the server is a lot of SOAPy work
                                   not worth doing IMHO. Also I thought it was possible to
                                   have the notification server send them directly, I was
                                   pretty sure I saw Pidgin do it..

                                   At least give a notification for now, seems like a
                                   reasonable thing to do. Only problem is, they'll keep
                                   coming back at login time until you read them using a
                                   different client. :-( */

                                char *xml = get_rfc822_header(body, "Mail-Data:", blen);
                                struct xt_node *md, *m;

                                if (!xml) {
                                        return 1;
                                }
                                md = xt_from_string(xml, 0);
                                if (!md) {
                                        return 1;
                                }

                                for (m = md->children; (m = xt_find_node(m, "M")); m = m->next) {
                                        struct xt_node *e = xt_find_node(m->children, "E");
                                        struct xt_node *rt = xt_find_node(m->children, "RT");
                                        struct tm tp;
                                        time_t msgtime = 0;

                                        if (!e || !e->text) {
                                                continue;
                                        }

                                        memset(&tp, 0, sizeof(tp));
                                        if (rt && rt->text &&
                                            sscanf(rt->text, "%4d-%2d-%2dT%2d:%2d:%2d.",
                                                   &tp.tm_year, &tp.tm_mon, &tp.tm_mday,
                                                   &tp.tm_hour, &tp.tm_min, &tp.tm_sec) == 6) {
                                                tp.tm_year -= 1900;
                                                tp.tm_mon--;
                                                msgtime = mktime_utc(&tp);

                                        }
                                        imcb_buddy_msg(ic, e->text,
                                                       "<< \002BitlBee\002 - Received offline message. BitlBee can't show these. >>", 0,
                                                       msgtime);
                                }

                                g_free(xml);
                                xt_free_node(md);
                        } else {
                                debug("Can't handle %s packet from notification server", ct);
                        }

                        g_free(ct);
                }
        } else if (strcmp(cmd[0], "UBX") == 0) {
                struct xt_node *ubx, *psm;
                char *psm_text = NULL;

                ubx = xt_from_string(msg, msglen);
                if (ubx && strcmp(ubx->name, "Data") == 0 &&
                    (psm = xt_find_node(ubx->children, "PSM"))) {
                        psm_text = psm->text;
                }

                imcb_buddy_status_msg(ic, msn_normalize_handle(cmd[1]), psm_text);
                xt_free_node(ubx);
        } else if (strcmp(cmd[0], "ADL") == 0) {
                struct xt_node *adl, *d, *c;

                if (!(adl = xt_from_string(msg, msglen))) {
                        return 1;
                }

                for (d = adl->children; d; d = d->next) {
                        char *dn;
                        if (strcmp(d->name, "d") != 0 ||
                            (dn = xt_find_attr(d, "n")) == NULL) {
                                continue;
                        }
                        for (c = d->children; c; c = c->next) {
                                bee_user_t *bu;
                                struct msn_buddy_data *bd;
                                char *cn, *handle, *f, *l;
                                int flags;

                                if (strcmp(c->name, "c") != 0 ||
                                    (l = xt_find_attr(c, "l")) == NULL ||
                                    (cn = xt_find_attr(c, "n")) == NULL) {
                                        continue;
                                }

                                /* FIXME: Use "t" here, guess I should just add it
                                   as a prefix like elsewhere in the protocol. */
                                handle = g_strdup_printf("%s@%s", cn, dn);
                                if (!((bu = bee_user_by_handle(ic->bee, ic, handle)) ||
                                      (bu = bee_user_new(ic->bee, ic, handle, 0)))) {
                                        g_free(handle);
                                        continue;
                                }
                                g_free(handle);
                                bd = bu->data;

                                if ((f = xt_find_attr(c, "f"))) {
                                        http_decode(f);
                                        imcb_rename_buddy(ic, bu->handle, f);
                                }

                                flags = atoi(l) & 15;
                                if (bd->flags != flags) {
                                        bd->flags = flags;
                                        msn_buddy_ask(bu);
                                }
                        }
                }
        } else if (strcmp(cmd[0], "UBM") == 0) {
                /* This one will give us msgs from federated networks. Technically
                   it should also get us offline messages, but I don't know how
                   I can signal MSN servers to use it. */
                char *ct, *handle;

                if (strcmp(cmd[1], ic->acc->user) == 0) {
                        /* With MPOP, you'll get copies of your own msgs from other
                           sessions. Discard those at least for now. */
                        return 1;
                }

                ct = get_rfc822_header(msg, "Content-Type", msglen);
                if (strncmp(ct, "text/plain", 10) != 0) {
                        /* Typing notification or something? */
                        g_free(ct);
                        return 1;
                }
                if (strcmp(cmd[2], "1") != 0) {
                        handle = g_strdup_printf("%s:%s", cmd[2], cmd[1]);
                } else {
                        handle = g_strdup(cmd[1]);
                }

                imcb_buddy_msg(ic, handle, body, 0, 0);
                g_free(handle);
        }

        return 1;
}

void msn_auth_got_passport_token(struct im_connection *ic, const char *token, const char *error)
{
        struct msn_data *md;

        /* Dead connection? */
        if (g_slist_find(msn_connections, ic) == NULL) {
                return;
        }

        md = ic->proto_data;

        if (token) {
                msn_ns_write(ic, -1, "USR %d SSO S %s %s {%s}\r\n", ++md->trId, md->tokens[0], token, md->uuid);
        } else {
                imcb_error(ic, "Error during Passport authentication: %s", error);
                imc_logout(ic, TRUE);
        }
}

void msn_auth_got_contact_list(struct im_connection *ic)
{
        struct msn_data *md;

        /* Dead connection? */
        if (g_slist_find(msn_connections, ic) == NULL) {
                return;
        }

        md = ic->proto_data;
        msn_ns_write(ic, -1, "BLP %d %s\r\n", ++md->trId, "BL");
}

static gboolean msn_ns_send_adl_1(gpointer key, gpointer value, gpointer data)
{
        struct xt_node *adl = data, *d, *c;
        struct bee_user *bu = value;
        struct msn_buddy_data *bd = bu->data;
        struct msn_data *md = bu->ic->proto_data;
        char handle[strlen(bu->handle) + 1];
        char *domain;
        char l[4];

        if ((bd->flags & 7) == 0 || (bd->flags & MSN_BUDDY_ADL_SYNCED)) {
                return FALSE;
        }

        strcpy(handle, bu->handle);
        if ((domain = strchr(handle, '@')) == NULL) {    /* WTF */
                return FALSE;
        }
        *domain = '\0';
        domain++;

        if ((d = adl->children) == NULL ||
            g_strcasecmp(xt_find_attr(d, "n"), domain) != 0) {
                d = xt_new_node("d", NULL, NULL);
                xt_add_attr(d, "n", domain);
                xt_insert_child(adl, d);
        }

        g_snprintf(l, sizeof(l), "%d", bd->flags & 7);
        c = xt_new_node("c", NULL, NULL);
        xt_add_attr(c, "n", handle);
        xt_add_attr(c, "l", l);
        xt_add_attr(c, "t", "1");   /* FIXME: Network type, i.e. 32 for Y!MSG */
        xt_insert_child(d, c);

        /* Do this in batches of 100. */
        bd->flags |= MSN_BUDDY_ADL_SYNCED;
        return (--md->adl_todo % 140) == 0;
}

static void msn_ns_send_adl(struct im_connection *ic)
{
        struct xt_node *adl;
        struct msn_data *md = ic->proto_data;
        char *adls;

        adl = xt_new_node("ml", NULL, NULL);
        xt_add_attr(adl, "l", "1");
        g_tree_foreach(md->domaintree, msn_ns_send_adl_1, adl);
        if (adl->children == NULL) {
                /* This tells the caller that we're done now. */
                md->adl_todo = -1;
                xt_free_node(adl);
                return;
        }

        adls = xt_to_string(adl);
        xt_free_node(adl);
        msn_ns_write(ic, -1, "ADL %d %zd\r\n%s", ++md->trId, strlen(adls), adls);
        g_free(adls);
}

static void msn_ns_send_adl_start(struct im_connection *ic)
{
        struct msn_data *md;
        GSList *l;

        /* Dead connection? */
        if (g_slist_find(msn_connections, ic) == NULL) {
                return;
        }

        md = ic->proto_data;
        md->adl_todo = 0;
        for (l = ic->bee->users; l; l = l->next) {
                bee_user_t *bu = l->data;
                struct msn_buddy_data *bd = bu->data;

                if (bu->ic != ic || (bd->flags & 7) == 0) {
                        continue;
                }

                bd->flags &= ~MSN_BUDDY_ADL_SYNCED;
                md->adl_todo++;
        }

        msn_ns_send_adl(ic);
}

int msn_ns_finish_login(struct im_connection *ic)
{
        struct msn_data *md = ic->proto_data;

        if (ic->flags & OPT_LOGGED_IN) {
                return 1;
        }

        if (md->adl_todo < 0) {
                md->flags |= MSN_DONE_ADL;
        }

        if ((md->flags & MSN_DONE_ADL) && (md->flags & MSN_GOT_PROFILE)) {
                if (md->flags & MSN_EMAIL_UNVERIFIED) {
                        imcb_connected(ic);
                } else {
                        return msn_ns_set_display_name(ic, set_getstr(&ic->acc->set, "display_name"));
                }
        }

        return 1;
}

int msn_ns_sendmessage(struct im_connection *ic, bee_user_t *bu, const char *text)
{
        struct msn_data *md = ic->proto_data;
        int type = 0;
        char *buf, *handle;

        if (strncmp(text, "\r\r\r", 3) == 0) {
                /* Err. Shouldn't happen but I guess it can. Don't send others
                   any of the "SHAKE THAT THING" messages. :-D */
                return 1;
        }

        /* This might be a federated contact. Get its network number,
           prefixed to bu->handle with a colon. Default is 1. */
        for (handle = bu->handle; g_ascii_isdigit(*handle); handle++) {
                type = type * 10 + *handle - '0';
        }
        if (*handle == ':') {
                handle++;
        } else {
                type = 1;
        }

        buf = g_strdup_printf("%s%s", MSN_MESSAGE_HEADERS, text);

        if (msn_ns_write(ic, -1, "UUM %d %s %d %d %zd\r\n%s",
                         ++md->trId, handle, type,
                         1,          /* type == IM (not nudge/typing) */
                         strlen(buf), buf)) {
                return 1;
        } else {
                return 0;
        }
}

void msn_ns_oim_send_queue(struct im_connection *ic, GSList **msgq)
{
        GSList *l;

        for (l = *msgq; l; l = l->next) {
                struct msn_message *m = l->data;
                bee_user_t *bu = bee_user_by_handle(ic->bee, ic, m->who);

                if (bu) {
                        if (!msn_ns_sendmessage(ic, bu, m->text)) {
                                return;
                        }
                }
        }

        while (*msgq != NULL) {
                struct msn_message *m = (*msgq)->data;

                *msgq = g_slist_remove(*msgq, m);
                g_free(m->who);
                g_free(m->text);
                g_free(m);
        }
}