source: protocols/account.c @ 2700925

/********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2013 Wilmer van der Gaast and others                *
  \********************************************************************/

/* Account management functions                                         */

/*
  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
*/

#define BITLBEE_CORE
#include "bitlbee.h"
#include "account.h"

static char *set_eval_nick_source(set_t *set, char *value);

account_t *account_add(bee_t *bee, struct prpl *prpl, char *user, char *pass)
{
        account_t *a;
        set_t *s;
        char tag[strlen(prpl->name) + 10];

        if (bee->accounts) {
                for (a = bee->accounts; a->next; a = a->next) {
                        ;
                }
                a = a->next = g_new0(account_t, 1);
        } else {
                bee->accounts = a = g_new0(account_t, 1);
        }

        a->prpl = prpl;
        a->user = g_strdup(user);
        a->pass = g_strdup(pass);
        a->auto_connect = 1;
        a->bee = bee;

        s = set_add(&a->set, "auto_connect", "true", set_eval_account, a);
        s->flags |= SET_NOSAVE;

        s = set_add(&a->set, "auto_reconnect", "true", set_eval_bool, a);

        s = set_add(&a->set, "nick_format", NULL, NULL, a);
        s->flags |= SET_NULL_OK;

        s = set_add(&a->set, "nick_source", "handle", set_eval_nick_source, a);
        s->flags |= SET_NOSAVE; /* Just for bw compatibility! */

        s = set_add(&a->set, "password", NULL, set_eval_account, a);
        s->flags |= SET_NOSAVE | SET_NULL_OK | SET_PASSWORD;

        s = set_add(&a->set, "tag", NULL, set_eval_account, a);
        s->flags |= SET_NOSAVE;

        s = set_add(&a->set, "username", NULL, set_eval_account, a);
        s->flags |= SET_NOSAVE | ACC_SET_OFFLINE_ONLY;
        set_setstr(&a->set, "username", user);

        /* Hardcode some more clever tag guesses. */
        strcpy(tag, prpl->name);
        if (strcmp(prpl->name, "oscar") == 0) {
                if (g_ascii_isdigit(a->user[0])) {
                        strcpy(tag, "icq");
                } else {
                        strcpy(tag, "aim");
                }
        } else if (strcmp(prpl->name, "jabber") == 0) {
                if (strstr(a->user, "@gmail.com") ||
                    strstr(a->user, "@googlemail.com")) {
                        strcpy(tag, "gtalk");
                } else if (strstr(a->user, "@chat.facebook.com")) {
                        strcpy(tag, "fb");
                }
        }

        if (account_by_tag(bee, tag)) {
                char *numpos = tag + strlen(tag);
                int i;

                for (i = 2; i < 10000; i++) {
                        sprintf(numpos, "%d", i);
                        if (!account_by_tag(bee, tag)) {
                                break;
                        }
                }
        }
        set_setstr(&a->set, "tag", tag);

        a->nicks = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);

        /* This function adds some more settings (and might want to do more
           things that have to be done now, although I can't think of anything. */
        if (prpl->init) {
                prpl->init(a);
        }

        s = set_add(&a->set, "away", NULL, set_eval_account, a);
        s->flags |= SET_NULL_OK;

        if (a->flags & ACC_FLAG_STATUS_MESSAGE) {
                s = set_add(&a->set, "status", NULL, set_eval_account, a);
                s->flags |= SET_NULL_OK;
        }

        return a;
}

char *set_eval_account(set_t *set, char *value)
{
        account_t *acc = set->data;

        /* Double-check: We refuse to edit on-line accounts. */
        if (set->flags & ACC_SET_OFFLINE_ONLY && acc->ic) {
                return SET_INVALID;
        }

        if (strcmp(set->key, "server") == 0) {
                g_free(acc->server);
                if (value && *value) {
                        acc->server = g_strdup(value);
                        return value;
                } else {
                        acc->server = g_strdup(set->def);
                        return g_strdup(set->def);
                }
        } else if (strcmp(set->key, "username") == 0) {
                g_free(acc->user);
                acc->user = g_strdup(value);
                return value;
        } else if (strcmp(set->key, "password") == 0) {
                /* set -del allows /oper to be used to change the password or,
                   iff oauth is enabled, reset the oauth credential magic.
                */
                if (!value) {
                        if (set_getbool(&(acc->set), "oauth")) {
                                value = "";
                        } else {
                                value = PASSWORD_PENDING;
                                ((irc_t *) acc->bee->ui_data)->status |= OPER_HACK_ACCOUNT_PASSWORD;
                                irc_rootmsg((irc_t *) acc->bee->ui_data, "You may now use /OPER to set the password");
                        }
                }

                g_free(acc->pass);
                acc->pass = g_strdup(value);
                return NULL;    /* password shouldn't be visible in plaintext! */
        } else if (strcmp(set->key, "tag") == 0) {
                account_t *oa;

                /* Enforce uniqueness. */
                if ((oa = account_by_tag(acc->bee, value)) && oa != acc) {
                        return SET_INVALID;
                }

                g_free(acc->tag);
                acc->tag = g_strdup(value);
                return value;
        } else if (strcmp(set->key, "auto_connect") == 0) {
                if (!is_bool(value)) {
                        return SET_INVALID;
                }

                acc->auto_connect = bool2int(value);
                return value;
        } else if (strcmp(set->key, "away") == 0 ||
                   strcmp(set->key, "status") == 0) {
                if (acc->ic && acc->ic->flags & OPT_LOGGED_IN) {
                        /* If we're currently on-line, set the var now already
                           (bit of a hack) and send an update. */
                        g_free(set->value);
                        set->value = g_strdup(value);

                        imc_away_send_update(acc->ic);
                }

                return value;
        }

        return SET_INVALID;
}

/* For bw compatibility, have this write-only setting. */
static char *set_eval_nick_source(set_t *set, char *value)
{
        account_t *a = set->data;

        if (strcmp(value, "full_name") == 0) {
                set_setstr(&a->set, "nick_format", "%full_name");
        } else if (strcmp(value, "first_name") == 0) {
                set_setstr(&a->set, "nick_format", "%first_name");
        } else {
                set_setstr(&a->set, "nick_format", "%-@nick");
        }

        return value;
}

account_t *account_get(bee_t *bee, const char *id)
{
        account_t *a, *ret = NULL;
        char *handle, *s;
        int nr;

        /* Tags get priority above anything else. */
        if ((a = account_by_tag(bee, id))) {
                return a;
        }

        /* This checks if the id string ends with (...) */
        if ((handle = strchr(id, '(')) && (s = strchr(handle, ')')) && s[1] == 0) {
                struct prpl *proto;

                *s = *handle = 0;
                handle++;

                if ((proto = find_protocol(id))) {
                        for (a = bee->accounts; a; a = a->next) {
                                if (a->prpl == proto &&
                                    a->prpl->handle_cmp(handle, a->user) == 0) {
                                        ret = a;
                                }
                        }
                }

                /* Restore the string. */
                handle--;
                *handle = '(';
                *s = ')';

                if (ret) {
                        return ret;
                }
        }

        if (sscanf(id, "%d", &nr) == 1 && nr < 1000) {
                for (a = bee->accounts; a; a = a->next) {
                        if ((nr--) == 0) {
                                return(a);
                        }
                }

                return(NULL);
        }

        for (a = bee->accounts; a; a = a->next) {
                if (g_strcasecmp(id, a->prpl->name) == 0) {
                        if (!ret) {
                                ret = a;
                        } else {
                                return(NULL);   /* We don't want to match more than one... */
                        }
                } else if (strstr(a->user, id)) {
                        if (!ret) {
                                ret = a;
                        } else {
                                return(NULL);
                        }
                }
        }

        return(ret);
}

account_t *account_by_tag(bee_t *bee, const char *tag)
{
        account_t *a;

        for (a = bee->accounts; a; a = a->next) {
                if (a->tag && g_strcasecmp(tag, a->tag) == 0) {
                        return a;
                }
        }

        return NULL;
}

void account_del(bee_t *bee, account_t *acc)
{
        account_t *a, *l = NULL;

        if (acc->ic) {
                /* Caller should have checked, accounts still in use can't be deleted. */
                return;
        }

        for (a = bee->accounts; a; a = (l = a)->next) {
                if (a == acc) {
                        if (l) {
                                l->next = a->next;
                        } else {
                                bee->accounts = a->next;
                        }

                        /** FIXME
                        for( c = bee->chatrooms; c; c = nc )
                        {
                                nc = c->next;
                                if( acc == c->acc )
                                        chat_del( bee, c );
                        }
                        */

                        while (a->set) {
                                set_del(&a->set, a->set->key);
                        }

                        g_hash_table_destroy(a->nicks);

                        g_free(a->tag);
                        g_free(a->user);
                        g_free(a->pass);
                        g_free(a->server);
                        if (a->reconnect) {     /* This prevents any reconnect still queued to happen */
                                cancel_auto_reconnect(a);
                        }
                        g_free(a);

                        break;
                }
        }
}

static gboolean account_on_timeout(gpointer d, gint fd, b_input_condition cond);

void account_on(bee_t *bee, account_t *a)
{
        if (a->ic) {
                /* Trying to enable an already-enabled account */
                return;
        }

        cancel_auto_reconnect(a);

        a->reconnect = 0;
        a->prpl->login(a);

        if (a->ic && !(a->ic->flags & (OPT_SLOW_LOGIN | OPT_LOGGED_IN))) {
                a->ic->keepalive = b_timeout_add(120000, account_on_timeout, a->ic);
        }
}

void account_off(bee_t *bee, account_t *a)
{
        imc_logout(a->ic, FALSE);
        a->ic = NULL;
        if (a->reconnect) {
                /* Shouldn't happen */
                cancel_auto_reconnect(a);
        }
}

static gboolean account_on_timeout(gpointer d, gint fd, b_input_condition cond)
{
        struct im_connection *ic = d;

        if (!(ic->flags & (OPT_SLOW_LOGIN | OPT_LOGGED_IN))) {
                imcb_error(ic, "Connection timeout");
                imc_logout(ic, TRUE);
        }

        return FALSE;
}

struct account_reconnect_delay {
        int start;
        char op;
        int step;
        int max;
};

int account_reconnect_delay_parse(char *value, struct account_reconnect_delay *p)
{
        memset(p, 0, sizeof(*p));
        /* A whole day seems like a sane "maximum maximum". */
        p->max = 86400;

        /* Format: /[0-9]+([*+][0-9]+(<[0-9+])?)?/ */
        while (*value && g_ascii_isdigit(*value)) {
                p->start = p->start * 10 + *value++ - '0';
        }

        /* Sure, call me evil for implementing my own fscanf here, but it's
           dead simple and I immediately know where to continue parsing. */

        if (*value == 0) {
                /* If the string ends now, the delay is constant. */
                return 1;
        } else if (*value != '+' && *value != '*') {
                /* Otherwise allow either a + or a * */
                return 0;
        }

        p->op = *value++;

        /* + or * the delay by this number every time. */
        while (*value && g_ascii_isdigit(*value)) {
                p->step = p->step * 10 + *value++ - '0';
        }

        if (*value == 0) {
                /* Use the default maximum (one day). */
                return 1;
        } else if (*value != '<') {
                return 0;
        }

        p->max = 0;
        value++;
        while (*value && g_ascii_isdigit(*value)) {
                p->max = p->max * 10 + *value++ - '0';
        }

        return p->max > 0;
}

char *set_eval_account_reconnect_delay(set_t *set, char *value)
{
        struct account_reconnect_delay p;

        return account_reconnect_delay_parse(value, &p) ? value : SET_INVALID;
}

int account_reconnect_delay(account_t *a)
{
        char *setting = set_getstr(&a->bee->set, "auto_reconnect_delay");
        struct account_reconnect_delay p;

        if (account_reconnect_delay_parse(setting, &p)) {
                if (a->auto_reconnect_delay == 0) {
                        a->auto_reconnect_delay = p.start;
                } else if (p.op == '+') {
                        a->auto_reconnect_delay += p.step;
                } else if (p.op == '*') {
                        a->auto_reconnect_delay *= p.step;
                }

                if (a->auto_reconnect_delay > p.max) {
                        a->auto_reconnect_delay = p.max;
                }
        } else {
                a->auto_reconnect_delay = 0;
        }

        return a->auto_reconnect_delay;
}