[a312b6b] | 1 | /********************************************************************\ |
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| 2 | * BitlBee -- An IRC to other IM-networks gateway * |
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| 3 | * * |
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[a338faa] | 4 | * Copyright 2002-2012 Wilmer van der Gaast and others * |
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[a312b6b] | 5 | \********************************************************************/ |
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| 6 | |
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| 7 | /* Storage backend that uses an XMLish format for all data. */ |
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| 8 | |
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| 9 | /* |
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| 10 | This program is free software; you can redistribute it and/or modify |
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| 11 | it under the terms of the GNU General Public License as published by |
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| 12 | the Free Software Foundation; either version 2 of the License, or |
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| 13 | (at your option) any later version. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, |
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| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 18 | GNU General Public License for more details. |
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| 19 | |
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| 20 | You should have received a copy of the GNU General Public License with |
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| 21 | the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL; |
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| 22 | if not, write to the Free Software Foundation, Inc., 59 Temple Place, |
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| 23 | Suite 330, Boston, MA 02111-1307 USA |
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| 24 | */ |
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| 25 | |
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| 26 | #define BITLBEE_CORE |
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| 27 | #include "bitlbee.h" |
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[6e1fed7] | 28 | #include "base64.h" |
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[a7b5925] | 29 | #include "arc.h" |
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[d28f3b35] | 30 | #include "md5.h" |
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[a338faa] | 31 | #include "xmltree.h" |
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[a312b6b] | 32 | |
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[88d2208] | 33 | #include <glib/gstdio.h> |
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[47b571d] | 34 | |
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[c121f89] | 35 | typedef enum |
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| 36 | { |
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| 37 | XML_PASS_CHECK_ONLY = -1, |
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| 38 | XML_PASS_UNKNOWN = 0, |
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[c9f0c79] | 39 | XML_PASS_WRONG, |
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[c121f89] | 40 | XML_PASS_OK |
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| 41 | } xml_pass_st; |
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| 42 | |
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[c9f0c79] | 43 | /* To make it easier later when extending the format: */ |
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[a338faa] | 44 | #define XML_FORMAT_VERSION "1" |
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[c121f89] | 45 | |
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[a312b6b] | 46 | struct xml_parsedata |
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| 47 | { |
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| 48 | irc_t *irc; |
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[00f1e93] | 49 | char given_nick[MAX_NICK_LENGTH+1]; |
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[c121f89] | 50 | char *given_pass; |
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[a312b6b] | 51 | }; |
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| 52 | |
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[00f1e93] | 53 | static void xml_init( void ) |
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[c121f89] | 54 | { |
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[00f1e93] | 55 | if( g_access( global.conf->configdir, F_OK ) != 0 ) |
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| 56 | log_message( LOGLVL_WARNING, "The configuration directory `%s' does not exist. Configuration won't be saved.", global.conf->configdir ); |
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| 57 | else if( g_access( global.conf->configdir, F_OK ) != 0 || |
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| 58 | g_access( global.conf->configdir, W_OK ) != 0 ) |
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| 59 | log_message( LOGLVL_WARNING, "Permission problem: Can't read/write from/to `%s'.", global.conf->configdir ); |
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[c121f89] | 60 | } |
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| 61 | |
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[00f1e93] | 62 | static void handle_settings( struct xt_node *node, set_t **head ) |
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[a312b6b] | 63 | { |
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[00f1e93] | 64 | struct xt_node *c; |
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[a312b6b] | 65 | |
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[00f1e93] | 66 | for( c = node->children; ( c = xt_find_node( c, "setting" ) ); c = c->next ) |
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[a312b6b] | 67 | { |
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[00f1e93] | 68 | char *name = xt_find_attr( c, "name" ); |
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[a312b6b] | 69 | |
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[00f1e93] | 70 | if( strcmp( node->name, "account" ) == 0 ) |
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[a312b6b] | 71 | { |
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[00f1e93] | 72 | set_t *s = set_find( head, name ); |
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| 73 | if( s && ( s->flags & ACC_SET_ONLINE_ONLY ) ) |
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| 74 | continue; /* U can't touch this! */ |
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[1917a1ec] | 75 | } |
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[00f1e93] | 76 | set_setstr( head, name, c->text ); |
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[a312b6b] | 77 | } |
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| 78 | } |
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| 79 | |
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[00f1e93] | 80 | static xt_status handle_account( struct xt_node *node, gpointer data ) |
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[a312b6b] | 81 | { |
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[5898ef8] | 82 | struct xml_parsedata *xd = data; |
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[00f1e93] | 83 | char *protocol, *handle, *server, *password = NULL, *autoconnect, *tag; |
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| 84 | char *pass_b64 = NULL; |
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| 85 | unsigned char *pass_cr = NULL; |
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| 86 | int pass_len; |
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| 87 | struct prpl *prpl = NULL; |
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| 88 | account_t *acc; |
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| 89 | struct xt_node *c; |
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[5898ef8] | 90 | |
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[00f1e93] | 91 | handle = xt_find_attr( node, "handle" ); |
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| 92 | pass_b64 = xt_find_attr( node, "password" ); |
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| 93 | server = xt_find_attr( node, "server" ); |
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| 94 | autoconnect = xt_find_attr( node, "autoconnect" ); |
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| 95 | tag = xt_find_attr( node, "tag" ); |
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| 96 | |
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| 97 | protocol = xt_find_attr( node, "protocol" ); |
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| 98 | if( protocol ) |
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| 99 | prpl = find_protocol( protocol ); |
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| 100 | |
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| 101 | if( !handle || !pass_b64 || !protocol || !prpl ) |
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| 102 | return XT_ABORT; |
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| 103 | else if( ( pass_len = base64_decode( pass_b64, (unsigned char**) &pass_cr ) ) && |
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| 104 | arc_decode( pass_cr, pass_len, &password, xd->given_pass ) >= 0 ) |
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| 105 | { |
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| 106 | acc = account_add( xd->irc->b, prpl, handle, password ); |
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| 107 | if( server ) |
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| 108 | set_setstr( &acc->set, "server", server ); |
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| 109 | if( autoconnect ) |
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| 110 | set_setstr( &acc->set, "auto_connect", autoconnect ); |
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| 111 | if( tag ) |
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| 112 | set_setstr( &acc->set, "tag", tag ); |
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[5898ef8] | 113 | } |
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[00f1e93] | 114 | else |
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| 115 | return XT_ABORT; |
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| 116 | |
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| 117 | g_free( pass_cr ); |
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| 118 | g_free( password ); |
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| 119 | |
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| 120 | handle_settings( node, &acc->set ); |
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| 121 | |
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| 122 | for( c = node->children; ( c = xt_find_node( c, "buddy" ) ); c = c->next ) |
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[1917a1ec] | 123 | { |
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[00f1e93] | 124 | char *handle, *nick; |
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| 125 | |
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| 126 | handle = xt_find_attr( c, "handle" ); |
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| 127 | nick = xt_find_attr( c, "nick" ); |
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| 128 | |
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| 129 | if( handle && nick ) |
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| 130 | nick_set_raw( acc, handle, nick ); |
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| 131 | else |
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| 132 | return XT_ABORT; |
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| 133 | } |
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| 134 | return XT_HANDLED; |
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[a312b6b] | 135 | } |
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| 136 | |
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[00f1e93] | 137 | static xt_status handle_channel( struct xt_node *node, gpointer data ) |
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[a312b6b] | 138 | { |
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| 139 | struct xml_parsedata *xd = data; |
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[00f1e93] | 140 | irc_channel_t *ic; |
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| 141 | char *name, *type; |
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[a312b6b] | 142 | |
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[00f1e93] | 143 | name = xt_find_attr( node, "name" ); |
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| 144 | type = xt_find_attr( node, "type" ); |
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[8320a7a] | 145 | |
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[00f1e93] | 146 | if( !name || !type ) |
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| 147 | return XT_ABORT; |
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| 148 | |
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| 149 | /* The channel may exist already, for example if it's &bitlbee. |
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| 150 | Also, it's possible that the user just reconnected and the |
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| 151 | IRC client already rejoined all channels it was in. They |
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| 152 | should still get the right settings. */ |
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| 153 | if( ( ic = irc_channel_by_name( xd->irc, name ) ) || |
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| 154 | ( ic = irc_channel_new( xd->irc, name ) ) ) |
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| 155 | set_setstr( &ic->set, "type", type ); |
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| 156 | |
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| 157 | handle_settings( node, &ic->set ); |
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| 158 | |
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| 159 | return XT_HANDLED; |
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[a312b6b] | 160 | } |
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| 161 | |
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[00f1e93] | 162 | static const struct xt_handler_entry handlers[] = { |
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| 163 | { "account", "user", handle_account, }, |
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| 164 | { "channel", "user", handle_channel, }, |
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| 165 | { NULL, NULL, NULL, }, |
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[a312b6b] | 166 | }; |
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| 167 | |
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[3183c21] | 168 | static storage_status_t xml_load_real( irc_t *irc, const char *my_nick, const char *password, xml_pass_st action ) |
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[a312b6b] | 169 | { |
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[00f1e93] | 170 | struct xml_parsedata xd[1]; |
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| 171 | char *fn, buf[204]; |
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[c121f89] | 172 | int fd, st; |
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[00f1e93] | 173 | struct xt_parser *xp; |
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| 174 | struct xt_node *node; |
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| 175 | storage_status_t ret = STORAGE_OTHER_ERROR; |
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| 176 | char *nick; |
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[a312b6b] | 177 | |
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[c121f89] | 178 | xd->irc = irc; |
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[00f1e93] | 179 | strncpy( xd->given_nick, my_nick, MAX_NICK_LENGTH ); |
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| 180 | xd->given_nick[MAX_NICK_LENGTH] = '\0'; |
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[c121f89] | 181 | nick_lc( xd->given_nick ); |
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[00f1e93] | 182 | xd->given_pass = password; |
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[a312b6b] | 183 | |
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[00f1e93] | 184 | fn = g_strconcat( global.conf->configdir, xd->given_nick, ".xml", NULL ); |
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[c121f89] | 185 | if( ( fd = open( fn, O_RDONLY ) ) < 0 ) |
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[a312b6b] | 186 | { |
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[00f1e93] | 187 | ret = STORAGE_NO_SUCH_USER; |
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| 188 | goto error; |
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[a312b6b] | 189 | } |
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| 190 | |
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[00f1e93] | 191 | xp = xt_new( handlers, xd ); |
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[c121f89] | 192 | while( ( st = read( fd, buf, sizeof( buf ) ) ) > 0 ) |
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[a312b6b] | 193 | { |
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[00f1e93] | 194 | st = xt_feed( xp, buf, st ); |
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| 195 | if( st != 1 ) |
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| 196 | break; |
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| 197 | } |
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| 198 | close( fd ); |
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| 199 | if( st != 0 ) |
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| 200 | goto error; |
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| 201 | |
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| 202 | node = xp->root; |
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| 203 | if( node == NULL || node->next != NULL || strcmp( node->name, "user" ) != 0 ) |
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| 204 | goto error; |
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| 205 | |
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| 206 | { |
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| 207 | char *nick = xt_find_attr( node, "nick" ); |
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| 208 | char *pass = xt_find_attr( node, "password" ); |
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| 209 | |
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| 210 | if( !nick || !pass ) |
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| 211 | { |
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| 212 | goto error; |
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| 213 | } |
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| 214 | else if( ( st = md5_verify_password( xd->given_pass, pass ) ) != 0 ) |
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[c121f89] | 215 | { |
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[00f1e93] | 216 | ret = STORAGE_INVALID_PASSWORD; |
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| 217 | goto error; |
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[c121f89] | 218 | } |
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[a312b6b] | 219 | } |
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[c121f89] | 220 | |
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[84e9cea] | 221 | if( action == XML_PASS_CHECK_ONLY ) |
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[00f1e93] | 222 | { |
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| 223 | ret = STORAGE_OK; |
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| 224 | goto error; |
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| 225 | } |
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| 226 | |
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| 227 | /* DO NOT call xt_handle() before verifying the password! */ |
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| 228 | if( xt_handle( xp, NULL, -1 ) == XT_HANDLED ) |
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| 229 | ret = STORAGE_OK; |
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[84e9cea] | 230 | |
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[00f1e93] | 231 | handle_settings( node, &xd->irc->b->set ); |
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| 232 | |
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| 233 | error: |
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| 234 | return ret; |
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[a312b6b] | 235 | } |
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| 236 | |
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[3183c21] | 237 | static storage_status_t xml_load( irc_t *irc, const char *password ) |
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[84e9cea] | 238 | { |
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[1f92a58] | 239 | return xml_load_real( irc, irc->user->nick, password, XML_PASS_UNKNOWN ); |
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[84e9cea] | 240 | } |
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| 241 | |
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| 242 | static storage_status_t xml_check_pass( const char *my_nick, const char *password ) |
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| 243 | { |
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[3183c21] | 244 | return xml_load_real( NULL, my_nick, password, XML_PASS_CHECK_ONLY ); |
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[84e9cea] | 245 | } |
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| 246 | |
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[00f1e93] | 247 | |
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[5b52a48] | 248 | static gboolean xml_save_nick( gpointer key, gpointer value, gpointer data ); |
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| 249 | |
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[a338faa] | 250 | struct xt_node *xml_generate( irc_t *irc ) |
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[a312b6b] | 251 | { |
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[a338faa] | 252 | char *pass_buf = NULL; |
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[5898ef8] | 253 | set_t *set; |
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| 254 | account_t *acc; |
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[6e1fed7] | 255 | md5_byte_t pass_md5[21]; |
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[ece2cd2] | 256 | md5_state_t md5_state; |
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[547ea68] | 257 | GSList *l; |
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[a338faa] | 258 | struct xt_node *root, *cur; |
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[5898ef8] | 259 | |
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[6e1fed7] | 260 | /* Generate a salted md5sum of the password. Use 5 bytes for the salt |
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| 261 | (to prevent dictionary lookups of passwords) to end up with a 21- |
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| 262 | byte password hash, more convenient for base64 encoding. */ |
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[1719464] | 263 | random_bytes( pass_md5 + 16, 5 ); |
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[ece2cd2] | 264 | md5_init( &md5_state ); |
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| 265 | md5_append( &md5_state, (md5_byte_t*) irc->password, strlen( irc->password ) ); |
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[6e1fed7] | 266 | md5_append( &md5_state, pass_md5 + 16, 5 ); /* Add the salt. */ |
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[ece2cd2] | 267 | md5_finish( &md5_state, pass_md5 ); |
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[6e1fed7] | 268 | /* Save the hash in base64-encoded form. */ |
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[3b6eadc] | 269 | pass_buf = base64_encode( pass_md5, 21 ); |
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[ece2cd2] | 270 | |
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[a338faa] | 271 | root = cur = xt_new_node( "user", NULL, NULL ); |
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| 272 | xt_add_attr( cur, "nick", irc->user->nick ); |
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| 273 | xt_add_attr( cur, "password", pass_buf ); |
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| 274 | xt_add_attr( cur, "version", XML_FORMAT_VERSION ); |
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[5898ef8] | 275 | |
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[6e1fed7] | 276 | g_free( pass_buf ); |
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| 277 | |
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[1f92a58] | 278 | for( set = irc->b->set; set; set = set->next ) |
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[5df65bd] | 279 | if( set->value && !( set->flags & SET_NOSAVE ) ) |
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[a338faa] | 280 | { |
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| 281 | struct xt_node *xset; |
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| 282 | xt_add_child( cur, xset = xt_new_node( "setting", set->value, NULL ) ); |
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| 283 | xt_add_attr( xset, "name", set->key ); |
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| 284 | } |
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[5898ef8] | 285 | |
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[1f92a58] | 286 | for( acc = irc->b->accounts; acc; acc = acc->next ) |
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[5898ef8] | 287 | { |
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[a7b5925] | 288 | unsigned char *pass_cr; |
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[3b6eadc] | 289 | char *pass_b64; |
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[6e1fed7] | 290 | int pass_len; |
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| 291 | |
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[ddcf491f] | 292 | pass_len = arc_encode( acc->pass, strlen( acc->pass ), (unsigned char**) &pass_cr, irc->password, 12 ); |
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[a7b5925] | 293 | pass_b64 = base64_encode( pass_cr, pass_len ); |
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| 294 | g_free( pass_cr ); |
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[6e1fed7] | 295 | |
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[a338faa] | 296 | cur = xt_new_node( "account", NULL, NULL ); |
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| 297 | xt_add_attr( cur, "protocol", acc->prpl->name ); |
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| 298 | xt_add_attr( cur, "handle", acc->user ); |
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| 299 | xt_add_attr( cur, "password", pass_b64 ); |
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| 300 | xt_add_attr( cur, "autoconnect", acc->auto_connect ? "true" : "false" ); |
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| 301 | xt_add_attr( cur, "tag", acc->tag ); |
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| 302 | if( acc->server && acc->server[0] ) |
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| 303 | xt_add_attr( cur, "server", acc->server ); |
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[6e1fed7] | 304 | |
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[a338faa] | 305 | g_free( pass_b64 ); |
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[5898ef8] | 306 | |
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[5100caa] | 307 | for( set = acc->set; set; set = set->next ) |
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[b84800d] | 308 | if( set->value && !( set->flags & ACC_SET_NOSAVE ) ) |
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[a338faa] | 309 | { |
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| 310 | struct xt_node *xset; |
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| 311 | xt_add_child( cur, xset = xt_new_node( "setting", set->value, NULL ) ); |
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| 312 | xt_add_attr( xset, "name", set->key ); |
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| 313 | } |
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[5100caa] | 314 | |
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[5b52a48] | 315 | /* This probably looks pretty strange. g_hash_table_foreach |
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| 316 | is quite a PITA already (but it can't get much better in |
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| 317 | C without using #define, I'm afraid), and since it |
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| 318 | doesn't seem to be possible to abort the foreach on write |
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| 319 | errors, so instead let's use the _find function and |
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| 320 | return TRUE on write errors. Which means, if we found |
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| 321 | something, there was an error. :-) */ |
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[a338faa] | 322 | g_hash_table_find( acc->nicks, xml_save_nick, cur ); |
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[5898ef8] | 323 | |
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[a338faa] | 324 | xt_add_child( root, cur ); |
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[5898ef8] | 325 | } |
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| 326 | |
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[547ea68] | 327 | for( l = irc->channels; l; l = l->next ) |
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| 328 | { |
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| 329 | irc_channel_t *ic = l->data; |
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| 330 | |
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[1c40aa7] | 331 | if( ic->flags & IRC_CHANNEL_TEMP ) |
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| 332 | continue; |
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| 333 | |
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[a338faa] | 334 | cur = xt_new_node( "channel", NULL, NULL ); |
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| 335 | xt_add_attr( cur, "name", ic->name ); |
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| 336 | xt_add_attr( cur, "type", set_getstr( &ic->set, "type" ) ); |
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[547ea68] | 337 | |
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| 338 | for( set = ic->set; set; set = set->next ) |
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| 339 | if( set->value && strcmp( set->key, "type" ) != 0 ) |
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[a338faa] | 340 | { |
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| 341 | struct xt_node *xset; |
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| 342 | xt_add_child( cur, xset = xt_new_node( "setting", set->value, NULL ) ); |
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| 343 | xt_add_attr( xset, "name", set->key ); |
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| 344 | } |
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[547ea68] | 345 | |
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[a338faa] | 346 | xt_add_child( root, cur ); |
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| 347 | } |
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| 348 | |
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| 349 | return root; |
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| 350 | } |
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| 351 | |
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| 352 | static storage_status_t xml_save( irc_t *irc, int overwrite ) |
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| 353 | { |
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| 354 | char path[512], *path2, *xml; |
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| 355 | struct xt_node *tree; |
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| 356 | int fd; |
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| 357 | |
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| 358 | path2 = g_strdup( irc->user->nick ); |
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| 359 | nick_lc( path2 ); |
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| 360 | g_snprintf( path, sizeof( path ) - 2, "%s%s%s", global.conf->configdir, path2, ".xml" ); |
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| 361 | g_free( path2 ); |
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| 362 | |
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| 363 | if( !overwrite && g_access( path, F_OK ) == 0 ) |
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| 364 | return STORAGE_ALREADY_EXISTS; |
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| 365 | |
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| 366 | strcat( path, ".XXXXXX" ); |
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| 367 | if( ( fd = mkstemp( path ) ) < 0 ) |
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| 368 | { |
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| 369 | irc_rootmsg( irc, "Error while opening configuration file." ); |
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| 370 | return STORAGE_OTHER_ERROR; |
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[547ea68] | 371 | } |
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| 372 | |
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[a338faa] | 373 | tree = xml_generate( irc ); |
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| 374 | xml = xt_to_string( tree ); |
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| 375 | write( fd, xml, strlen( xml ) ); |
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[5898ef8] | 376 | |
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[542e44a] | 377 | fsync( fd ); |
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[5898ef8] | 378 | close( fd ); |
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| 379 | |
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[f277225] | 380 | path2 = g_strndup( path, strlen( path ) - 7 ); |
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[5898ef8] | 381 | if( rename( path, path2 ) != 0 ) |
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| 382 | { |
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[e67e513] | 383 | irc_rootmsg( irc, "Error while renaming temporary configuration file." ); |
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[5898ef8] | 384 | |
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| 385 | g_free( path2 ); |
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| 386 | unlink( path ); |
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| 387 | |
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| 388 | return STORAGE_OTHER_ERROR; |
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| 389 | } |
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| 390 | |
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| 391 | g_free( path2 ); |
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| 392 | |
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[a312b6b] | 393 | return STORAGE_OK; |
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[5898ef8] | 394 | |
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| 395 | write_error: |
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[6e1fed7] | 396 | |
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[e67e513] | 397 | irc_rootmsg( irc, "Write error. Disk full?" ); |
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[5898ef8] | 398 | close( fd ); |
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| 399 | |
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| 400 | return STORAGE_OTHER_ERROR; |
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[a312b6b] | 401 | } |
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| 402 | |
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[5b52a48] | 403 | static gboolean xml_save_nick( gpointer key, gpointer value, gpointer data ) |
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| 404 | { |
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[a338faa] | 405 | struct xt_node *node = xt_new_node( "buddy", NULL, NULL ); |
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| 406 | xt_add_attr( node, "handle", key ); |
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| 407 | xt_add_attr( node, "nick", value ); |
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| 408 | xt_add_child( (struct xt_node *) data, node ); |
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| 409 | |
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| 410 | return FALSE; |
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[5b52a48] | 411 | } |
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| 412 | |
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[84e9cea] | 413 | static storage_status_t xml_remove( const char *nick, const char *password ) |
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| 414 | { |
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[e0f9170] | 415 | char s[512], *lc; |
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[84e9cea] | 416 | storage_status_t status; |
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| 417 | |
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| 418 | status = xml_check_pass( nick, password ); |
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| 419 | if( status != STORAGE_OK ) |
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| 420 | return status; |
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| 421 | |
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[e0f9170] | 422 | lc = g_strdup( nick ); |
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| 423 | nick_lc( lc ); |
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| 424 | g_snprintf( s, 511, "%s%s%s", global.conf->configdir, lc, ".xml" ); |
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| 425 | g_free( lc ); |
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| 426 | |
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[84e9cea] | 427 | if( unlink( s ) == -1 ) |
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| 428 | return STORAGE_OTHER_ERROR; |
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| 429 | |
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| 430 | return STORAGE_OK; |
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| 431 | } |
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| 432 | |
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[a312b6b] | 433 | storage_t storage_xml = { |
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| 434 | .name = "xml", |
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| 435 | .init = xml_init, |
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[84e9cea] | 436 | .check_pass = xml_check_pass, |
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| 437 | .remove = xml_remove, |
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[a312b6b] | 438 | .load = xml_load, |
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| 439 | .save = xml_save |
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| 440 | }; |
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