1 | /********************************************************************\ |
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2 | * BitlBee -- An IRC to other IM-networks gateway * |
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3 | * * |
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4 | * Copyright 2002-2012 Wilmer van der Gaast and others * |
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5 | \********************************************************************/ |
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6 | |
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7 | /* Some stuff to fetch, save and handle nicknames for your buddies */ |
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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., 51 Franklin St., |
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23 | Fifth Floor, Boston, MA 02110-1301 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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28 | |
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29 | /* Character maps, _lc_[x] == _uc_[x] (but uppercase), according to the RFC's. |
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30 | With one difference, we allow dashes. These are used to do uc/lc conversions |
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31 | and strip invalid chars. */ |
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32 | static char *nick_lc_chars = "0123456789abcdefghijklmnopqrstuvwxyz{}^`-_|"; |
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33 | static char *nick_uc_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ[]~`-_\\"; |
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34 | |
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35 | /* Store handles in lower case and strip spaces, because AIM is braindead. */ |
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36 | static char *clean_handle( const char *orig ) |
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37 | { |
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38 | char *new = g_malloc( strlen( orig ) + 1 ); |
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39 | int i = 0; |
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40 | |
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41 | do { |
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42 | if (*orig != ' ') |
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43 | new[i++] = g_ascii_tolower( *orig ); |
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44 | } |
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45 | while (*(orig++)); |
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46 | |
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47 | return new; |
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48 | } |
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49 | |
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50 | void nick_set_raw( account_t *acc, const char *handle, const char *nick ) |
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51 | { |
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52 | char *store_handle, *store_nick = g_malloc( MAX_NICK_LENGTH + 1 ); |
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53 | irc_t *irc = (irc_t *) acc->bee->ui_data; |
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54 | |
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55 | store_handle = clean_handle( handle ); |
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56 | store_nick[MAX_NICK_LENGTH] = '\0'; |
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57 | strncpy( store_nick, nick, MAX_NICK_LENGTH ); |
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58 | nick_strip( irc, store_nick ); |
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59 | |
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60 | g_hash_table_replace( acc->nicks, store_handle, store_nick ); |
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61 | } |
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62 | |
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63 | void nick_set( bee_user_t *bu, const char *nick ) |
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64 | { |
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65 | nick_set_raw( bu->ic->acc, bu->handle, nick ); |
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66 | } |
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67 | |
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68 | char *nick_get( bee_user_t *bu ) |
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69 | { |
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70 | static char nick[MAX_NICK_LENGTH+1]; |
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71 | char *store_handle, *found_nick; |
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72 | irc_t *irc = (irc_t *) bu->bee->ui_data; |
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73 | |
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74 | memset( nick, 0, MAX_NICK_LENGTH + 1 ); |
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75 | |
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76 | store_handle = clean_handle( bu->handle ); |
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77 | /* Find out if we stored a nick for this person already. If not, try |
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78 | to generate a sane nick automatically. */ |
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79 | if( ( found_nick = g_hash_table_lookup( bu->ic->acc->nicks, store_handle ) ) ) |
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80 | { |
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81 | strncpy( nick, found_nick, MAX_NICK_LENGTH ); |
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82 | } |
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83 | else if( ( found_nick = nick_gen( bu ) ) ) |
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84 | { |
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85 | strncpy( nick, found_nick, MAX_NICK_LENGTH ); |
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86 | g_free( found_nick ); |
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87 | } |
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88 | else |
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89 | { |
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90 | /* Keep this fallback since nick_gen() can return NULL in some cases. */ |
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91 | char *s; |
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92 | |
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93 | g_snprintf( nick, MAX_NICK_LENGTH, "%s", bu->handle ); |
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94 | if( ( s = strchr( nick, '@' ) ) ) |
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95 | while( *s ) |
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96 | *(s++) = 0; |
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97 | |
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98 | nick_strip( irc, nick ); |
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99 | if( set_getbool( &bu->bee->set, "lcnicks" ) ) |
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100 | nick_lc( irc, nick ); |
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101 | } |
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102 | g_free( store_handle ); |
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103 | |
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104 | /* Make sure the nick doesn't collide with an existing one by adding |
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105 | underscores and that kind of stuff, if necessary. */ |
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106 | nick_dedupe( bu, nick ); |
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107 | |
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108 | return nick; |
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109 | } |
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110 | |
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111 | char *nick_gen( bee_user_t *bu ) |
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112 | { |
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113 | gboolean ok = FALSE; /* Set to true once the nick contains something unique. */ |
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114 | GString *ret = g_string_sized_new( MAX_NICK_LENGTH + 1 ); |
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115 | char *rets; |
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116 | irc_t *irc = (irc_t *) bu->bee->ui_data; |
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117 | char *fmt = set_getstr( &bu->ic->acc->set, "nick_format" ) ? : |
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118 | set_getstr( &bu->bee->set, "nick_format" ); |
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119 | |
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120 | while( fmt && *fmt && ret->len < MAX_NICK_LENGTH ) |
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121 | { |
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122 | char *part = NULL, chop = '\0', *asc = NULL, *s; |
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123 | int len = INT_MAX; |
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124 | |
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125 | if( *fmt != '%' ) |
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126 | { |
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127 | g_string_append_c( ret, *fmt ); |
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128 | fmt ++; |
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129 | continue; |
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130 | } |
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131 | |
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132 | fmt ++; |
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133 | while( *fmt ) |
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134 | { |
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135 | /* -char means chop off everything from char */ |
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136 | if( *fmt == '-' ) |
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137 | { |
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138 | chop = fmt[1]; |
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139 | if( chop == '\0' ) |
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140 | { |
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141 | g_string_free( ret, TRUE ); |
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142 | return NULL; |
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143 | } |
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144 | fmt += 2; |
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145 | } |
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146 | else if( g_ascii_isdigit( *fmt ) ) |
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147 | { |
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148 | len = 0; |
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149 | /* Grab a number. */ |
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150 | while( g_ascii_isdigit( *fmt ) ) |
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151 | len = len * 10 + ( *(fmt++) - '0' ); |
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152 | } |
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153 | else if( g_strncasecmp( fmt, "nick", 4 ) == 0 ) |
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154 | { |
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155 | part = bu->nick ? : bu->handle; |
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156 | fmt += 4; |
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157 | ok |= TRUE; |
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158 | break; |
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159 | } |
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160 | else if( g_strncasecmp( fmt, "handle", 6 ) == 0 ) |
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161 | { |
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162 | part = bu->handle; |
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163 | fmt += 6; |
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164 | ok |= TRUE; |
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165 | break; |
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166 | } |
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167 | else if( g_strncasecmp( fmt, "full_name", 9 ) == 0 ) |
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168 | { |
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169 | part = bu->fullname; |
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170 | fmt += 9; |
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171 | ok |= part && *part; |
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172 | break; |
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173 | } |
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174 | else if( g_strncasecmp( fmt, "first_name", 10 ) == 0 ) |
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175 | { |
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176 | part = bu->fullname; |
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177 | fmt += 10; |
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178 | ok |= part && *part; |
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179 | chop = ' '; |
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180 | break; |
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181 | } |
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182 | else if( g_strncasecmp( fmt, "group", 5 ) == 0 ) |
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183 | { |
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184 | part = bu->group ? bu->group->name : NULL; |
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185 | fmt += 5; |
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186 | break; |
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187 | } |
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188 | else if( g_strncasecmp( fmt, "account", 7 ) == 0 ) |
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189 | { |
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190 | part = bu->ic->acc->tag; |
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191 | fmt += 7; |
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192 | break; |
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193 | } |
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194 | else |
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195 | { |
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196 | g_string_free( ret, TRUE ); |
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197 | return NULL; |
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198 | } |
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199 | } |
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200 | |
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201 | if( !part ) |
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202 | continue; |
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203 | |
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204 | /* Credits to Josay_ in #bitlbee for this idea. //TRANSLIT |
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205 | should do lossy/approximate conversions, so letters with |
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206 | accents don't just get stripped. Note that it depends on |
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207 | LC_CTYPE being set to something other than C/POSIX. */ |
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208 | if( !( irc && irc->status & IRC_UTF8_NICKS ) ) |
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209 | part = asc = g_convert_with_fallback( part, -1, "ASCII//TRANSLIT", |
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210 | "UTF-8", "", NULL, NULL, NULL ); |
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211 | |
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212 | if( part && chop && ( s = strchr( part, chop ) ) ) |
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213 | len = MIN( len, s - part ); |
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214 | |
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215 | if( part ) |
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216 | { |
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217 | if( len < INT_MAX ) |
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218 | g_string_append_len( ret, part, len ); |
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219 | else |
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220 | g_string_append( ret, part ); |
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221 | } |
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222 | g_free( asc ); |
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223 | } |
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224 | |
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225 | rets = g_string_free( ret, FALSE ); |
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226 | if( ok && rets && *rets ) |
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227 | { |
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228 | nick_strip( irc, rets ); |
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229 | truncate_utf8( rets, MAX_NICK_LENGTH ); |
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230 | return rets; |
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231 | } |
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232 | g_free( rets ); |
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233 | return NULL; |
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234 | } |
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235 | |
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236 | void nick_dedupe( bee_user_t *bu, char nick[MAX_NICK_LENGTH+1] ) |
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237 | { |
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238 | irc_t *irc = (irc_t*) bu->bee->ui_data; |
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239 | int inf_protection = 256; |
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240 | irc_user_t *iu; |
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241 | |
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242 | /* Now, find out if the nick is already in use at the moment, and make |
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243 | subtle changes to make it unique. */ |
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244 | while( !nick_ok( irc, nick ) || |
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245 | ( ( iu = irc_user_by_name( irc, nick ) ) && iu->bu != bu ) ) |
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246 | { |
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247 | if( strlen( nick ) < ( MAX_NICK_LENGTH - 1 ) ) |
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248 | { |
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249 | nick[strlen(nick)+1] = 0; |
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250 | nick[strlen(nick)] = '_'; |
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251 | } |
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252 | else |
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253 | { |
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254 | /* We've got no more space for underscores, |
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255 | so truncate it and replace the last three |
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256 | chars with a random "_XX" suffix */ |
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257 | int len = truncate_utf8( nick, MAX_NICK_LENGTH - 3 ); |
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258 | nick[len] = '_'; |
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259 | g_snprintf(nick + len + 1, 3, "%2x", rand() ); |
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260 | } |
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261 | |
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262 | if( inf_protection-- == 0 ) |
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263 | { |
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264 | g_snprintf( nick, MAX_NICK_LENGTH + 1, "xx%x", rand() ); |
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265 | |
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266 | irc_rootmsg( irc, "Warning: Something went wrong while trying " |
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267 | "to generate a nickname for contact %s on %s.", |
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268 | bu->handle, bu->ic->acc->tag ); |
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269 | irc_rootmsg( irc, "This might be a bug in BitlBee, or the result " |
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270 | "of a faulty nick_format setting. Will use %s " |
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271 | "instead.", nick ); |
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272 | |
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273 | break; |
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274 | } |
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275 | } |
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276 | } |
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277 | |
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278 | /* Just check if there is a nickname set for this buddy or if we'd have to |
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279 | generate one. */ |
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280 | int nick_saved( bee_user_t *bu ) |
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281 | { |
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282 | char *store_handle, *found; |
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283 | |
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284 | store_handle = clean_handle( bu->handle ); |
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285 | found = g_hash_table_lookup( bu->ic->acc->nicks, store_handle ); |
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286 | g_free( store_handle ); |
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287 | |
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288 | return found != NULL; |
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289 | } |
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290 | |
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291 | void nick_del( bee_user_t *bu ) |
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292 | { |
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293 | g_hash_table_remove( bu->ic->acc->nicks, bu->handle ); |
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294 | } |
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295 | |
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296 | |
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297 | void nick_strip( irc_t *irc, char *nick ) |
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298 | { |
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299 | int len = 0; |
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300 | |
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301 | if( irc && ( irc->status & IRC_UTF8_NICKS ) ) |
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302 | { |
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303 | gunichar c; |
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304 | char *p = nick, *n, tmp[strlen(nick)+1]; |
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305 | |
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306 | while( p && *p ) |
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307 | { |
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308 | c = g_utf8_get_char_validated( p, -1 ); |
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309 | n = g_utf8_find_next_char( p, NULL ); |
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310 | |
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311 | if( ( c < 0x7f && !( strchr( nick_lc_chars, c ) || |
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312 | strchr( nick_uc_chars, c ) ) ) || |
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313 | !g_unichar_isgraph( c ) ) |
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314 | { |
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315 | strcpy( tmp, n ); |
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316 | strcpy( p, tmp ); |
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317 | } |
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318 | else |
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319 | p = n; |
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320 | } |
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321 | if( p ) |
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322 | len = p - nick; |
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323 | } |
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324 | else |
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325 | { |
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326 | int i; |
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327 | |
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328 | for( i = len = 0; nick[i] && len < MAX_NICK_LENGTH; i++ ) |
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329 | { |
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330 | if( strchr( nick_lc_chars, nick[i] ) || |
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331 | strchr( nick_uc_chars, nick[i] ) ) |
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332 | { |
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333 | nick[len] = nick[i]; |
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334 | len++; |
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335 | } |
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336 | } |
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337 | } |
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338 | if( g_ascii_isdigit( nick[0] ) ) |
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339 | { |
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340 | char *orig; |
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341 | |
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342 | /* First character of a nick can't be a digit, so insert an |
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343 | underscore if necessary. */ |
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344 | orig = g_strdup( nick ); |
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345 | g_snprintf( nick, MAX_NICK_LENGTH, "_%s", orig ); |
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346 | g_free( orig ); |
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347 | len ++; |
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348 | } |
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349 | while( len <= MAX_NICK_LENGTH ) |
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350 | nick[len++] = '\0'; |
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351 | } |
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352 | |
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353 | gboolean nick_ok( irc_t *irc, const char *nick ) |
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354 | { |
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355 | const char *s; |
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356 | |
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357 | /* Empty/long nicks are not allowed, nor numbers at [0] */ |
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358 | if( !*nick || g_ascii_isdigit( nick[0] ) || strlen( nick ) > MAX_NICK_LENGTH ) |
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359 | return 0; |
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360 | |
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361 | if( irc && ( irc->status & IRC_UTF8_NICKS ) ) |
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362 | { |
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363 | gunichar c; |
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364 | const char *p = nick, *n; |
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365 | |
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366 | while( p && *p ) |
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367 | { |
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368 | c = g_utf8_get_char_validated( p, -1 ); |
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369 | n = g_utf8_find_next_char( p, NULL ); |
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370 | |
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371 | if( ( c < 0x7f && !( strchr( nick_lc_chars, c ) || |
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372 | strchr( nick_uc_chars, c ) ) ) || |
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373 | !g_unichar_isgraph( c ) ) |
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374 | { |
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375 | return FALSE; |
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376 | } |
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377 | p = n; |
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378 | } |
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379 | } |
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380 | else |
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381 | { |
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382 | for( s = nick; *s; s ++ ) |
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383 | if( !strchr( nick_lc_chars, *s ) && !strchr( nick_uc_chars, *s ) ) |
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384 | return FALSE; |
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385 | } |
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386 | |
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387 | return TRUE; |
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388 | } |
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389 | |
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390 | int nick_lc( irc_t *irc, char *nick ) |
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391 | { |
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392 | static char tab[128] = { 0 }; |
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393 | int i; |
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394 | |
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395 | if( tab['A'] == 0 ) |
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396 | for( i = 0; nick_lc_chars[i]; i ++ ) |
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397 | { |
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398 | tab[(int)nick_uc_chars[i]] = nick_lc_chars[i]; |
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399 | tab[(int)nick_lc_chars[i]] = nick_lc_chars[i]; |
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400 | } |
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401 | |
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402 | if( irc && ( irc->status & IRC_UTF8_NICKS ) ) |
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403 | { |
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404 | gchar *down = g_utf8_strdown( nick, -1 ); |
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405 | if( strlen( down ) > strlen( nick ) ) |
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406 | { |
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407 | truncate_utf8( down, strlen( nick ) ); |
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408 | } |
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409 | strcpy( nick, down ); |
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410 | g_free( down ); |
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411 | } |
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412 | |
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413 | for( i = 0; nick[i]; i ++ ) |
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414 | if( ((guchar)nick[i]) < 0x7f ) |
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415 | nick[i] = tab[(guchar)nick[i]]; |
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416 | |
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417 | return nick_ok( irc, nick ); |
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418 | } |
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419 | |
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420 | int nick_cmp( irc_t *irc, const char *a, const char *b ) |
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421 | { |
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422 | char aa[1024] = "", bb[1024] = ""; |
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423 | |
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424 | strncpy( aa, a, sizeof( aa ) - 1 ); |
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425 | strncpy( bb, b, sizeof( bb ) - 1 ); |
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426 | if( nick_lc( irc, aa ) && nick_lc( irc, bb ) ) |
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427 | { |
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428 | return( strcmp( aa, bb ) ); |
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429 | } |
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430 | else |
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431 | { |
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432 | return( -1 ); /* Hmm... Not a clear answer.. :-/ */ |
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433 | } |
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434 | } |
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