[5e53c4a] | 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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[e374dee] | 134 | faim_internal int aim_dumpcookie(aim_session_t *sess, aim_msgcookie_t *cookie) |
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[5e53c4a] | 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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[e374dee] | 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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[5e53c4a] | 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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[e374dee] | 187 | case AIM_CAPS_DIRECTIM: return AIM_COOKIETYPE_OFTIMAGE; |
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[5e53c4a] | 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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