1 | /* |
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2 | * Cookie Caching stuff. Adam wrote this, apparently just some |
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3 | * derivatives of n's SNAC work. I cleaned it up, added comments. |
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4 | * |
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5 | */ |
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6 | |
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7 | /* |
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8 | * I'm assuming that cookies are type-specific. that is, we can have |
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9 | * "1234578" for type 1 and type 2 concurrently. if i'm wrong, then we |
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10 | * lose some error checking. if we assume cookies are not type-specific and are |
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11 | * wrong, we get quirky behavior when cookies step on each others' toes. |
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12 | */ |
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13 | |
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14 | #define FAIM_INTERNAL |
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15 | #include <aim.h> |
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16 | |
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17 | /** |
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18 | * aim_cachecookie - appends a cookie to the cookie list |
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19 | * @sess: session to add to |
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20 | * @cookie: pointer to struct to append |
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21 | * |
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22 | * if cookie->cookie for type cookie->type is found, updates the |
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23 | * ->addtime of the found structure; otherwise adds the given cookie |
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24 | * to the cache |
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25 | * |
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26 | * returns -1 on error, 0 on append, 1 on update. the cookie you pass |
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27 | * in may be free'd, so don't count on its value after calling this! |
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28 | * |
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29 | */ |
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30 | faim_internal int aim_cachecookie(aim_session_t *sess, aim_msgcookie_t *cookie) |
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31 | { |
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32 | aim_msgcookie_t *newcook; |
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33 | |
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34 | if (!sess || !cookie) |
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35 | return -EINVAL; |
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36 | |
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37 | newcook = aim_checkcookie(sess, cookie->cookie, cookie->type); |
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38 | |
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39 | if (newcook == cookie) { |
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40 | newcook->addtime = time(NULL); |
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41 | return 1; |
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42 | } else if (newcook) |
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43 | aim_cookie_free(sess, newcook); |
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44 | |
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45 | cookie->addtime = time(NULL); |
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46 | |
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47 | cookie->next = sess->msgcookies; |
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48 | sess->msgcookies = cookie; |
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49 | |
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50 | return 0; |
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51 | } |
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52 | |
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53 | /** |
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54 | * aim_uncachecookie - grabs a cookie from the cookie cache (removes it from the list) |
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55 | * @sess: session to grab cookie from |
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56 | * @cookie: cookie string to look for |
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57 | * @type: cookie type to look for |
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58 | * |
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59 | * takes a cookie string and a cookie type and finds the cookie struct associated with that duple, removing it from the cookie list ikn the process. |
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60 | * |
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61 | * if found, returns the struct; if none found (or on error), returns NULL: |
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62 | */ |
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63 | faim_internal aim_msgcookie_t *aim_uncachecookie(aim_session_t *sess, fu8_t *cookie, int type) |
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64 | { |
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65 | aim_msgcookie_t *cur, **prev; |
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66 | |
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67 | if (!cookie || !sess->msgcookies) |
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68 | return NULL; |
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69 | |
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70 | for (prev = &sess->msgcookies; (cur = *prev); ) { |
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71 | if ((cur->type == type) && |
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72 | (memcmp(cur->cookie, cookie, 8) == 0)) { |
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73 | *prev = cur->next; |
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74 | return cur; |
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75 | } |
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76 | prev = &cur->next; |
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77 | } |
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78 | |
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79 | return NULL; |
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80 | } |
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81 | |
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82 | /** |
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83 | * aim_mkcookie - generate an aim_msgcookie_t *struct from a cookie string, a type, and a data pointer. |
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84 | * @c: pointer to the cookie string array |
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85 | * @type: cookie type to use |
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86 | * @data: data to be cached with the cookie |
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87 | * |
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88 | * returns NULL on error, a pointer to the newly-allocated cookie on |
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89 | * success. |
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90 | * |
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91 | */ |
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92 | faim_internal aim_msgcookie_t *aim_mkcookie(fu8_t *c, int type, void *data) |
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93 | { |
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94 | aim_msgcookie_t *cookie; |
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95 | |
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96 | if (!c) |
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97 | return NULL; |
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98 | |
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99 | if (!(cookie = calloc(1, sizeof(aim_msgcookie_t)))) |
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100 | return NULL; |
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101 | |
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102 | cookie->data = data; |
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103 | cookie->type = type; |
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104 | memcpy(cookie->cookie, c, 8); |
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105 | |
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106 | return cookie; |
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107 | } |
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108 | |
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109 | /** |
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110 | * aim_checkcookie - check to see if a cookietuple has been cached |
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111 | * @sess: session to check for the cookie in |
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112 | * @cookie: pointer to the cookie string array |
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113 | * @type: type of the cookie to look for |
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114 | * |
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115 | * this returns a pointer to the cookie struct (still in the list) on |
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116 | * success; returns NULL on error/not found |
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117 | * |
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118 | */ |
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119 | |
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120 | faim_internal aim_msgcookie_t *aim_checkcookie(aim_session_t *sess, const fu8_t *cookie, int type) |
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121 | { |
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122 | aim_msgcookie_t *cur; |
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123 | |
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124 | for (cur = sess->msgcookies; cur; cur = cur->next) { |
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125 | if ((cur->type == type) && |
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126 | (memcmp(cur->cookie, cookie, 8) == 0)) |
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127 | return cur; |
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128 | } |
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129 | |
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130 | return NULL; |
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131 | } |
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132 | |
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133 | #if 0 /* debugging feature */ |
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134 | faim_internal int aim_dumpcookie(aim_session_t *sess, aim_msgcookie_t *cookie) |
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135 | { |
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136 | |
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137 | if (!cookie) |
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138 | return -EINVAL; |
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139 | |
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140 | faimdprintf(sess, 0, "\tCookie at %p: %d/%s with %p, next %p\n", cookie, |
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141 | cookie->type, cookie->cookie, cookie->data, cookie->next); |
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142 | |
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143 | return 0; |
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144 | } |
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145 | #endif |
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146 | |
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147 | /** |
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148 | * aim_cookie_free - free an aim_msgcookie_t struct |
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149 | * @sess: session to remove the cookie from |
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150 | * @cookiep: the address of a pointer to the cookie struct to remove |
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151 | * |
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152 | * this function removes the cookie *cookie from teh list of cookies |
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153 | * in sess, and then frees all memory associated with it. including |
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154 | * its data! if you want to use the private data after calling this, |
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155 | * make sure you copy it first. |
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156 | * |
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157 | * returns -1 on error, 0 on success. |
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158 | * |
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159 | */ |
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160 | faim_internal int aim_cookie_free(aim_session_t *sess, aim_msgcookie_t *cookie) |
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161 | { |
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162 | aim_msgcookie_t *cur, **prev; |
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163 | |
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164 | if (!sess || !cookie) |
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165 | return -EINVAL; |
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166 | |
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167 | for (prev = &sess->msgcookies; (cur = *prev); ) { |
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168 | if (cur == cookie) |
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169 | *prev = cur->next; |
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170 | else |
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171 | prev = &cur->next; |
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172 | } |
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173 | |
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174 | free(cookie->data); |
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175 | free(cookie); |
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176 | |
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177 | return 0; |
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178 | } |
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179 | |
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180 | /* XXX I hate switch */ |
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181 | faim_internal int aim_msgcookie_gettype(int reqclass) |
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182 | { |
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183 | /* XXX: hokey-assed. needs fixed. */ |
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184 | switch(reqclass) { |
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185 | case AIM_CAPS_BUDDYICON: return AIM_COOKIETYPE_OFTICON; |
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186 | case AIM_CAPS_VOICE: return AIM_COOKIETYPE_OFTVOICE; |
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187 | case AIM_CAPS_DIRECTIM: return AIM_COOKIETYPE_OFTIMAGE; |
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188 | case AIM_CAPS_CHAT: return AIM_COOKIETYPE_CHAT; |
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189 | case AIM_CAPS_GETFILE: return AIM_COOKIETYPE_OFTGET; |
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190 | case AIM_CAPS_SENDFILE: return AIM_COOKIETYPE_OFTSEND; |
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191 | default: return AIM_COOKIETYPE_UNKNOWN; |
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192 | } |
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193 | } |
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