comparison: src/protocols/oscar/snac.c
src/protocols/oscar/snac.c
- changeset 14253
- b63ebf84c42b
- parent 14252
- d10dda2777a9
- child 14254
- 77edc7a6191a
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| 14252:d10dda2777a9 | 14253:b63ebf84c42b |
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| 1 /* | |
| 2 * Gaim's oscar protocol plugin | |
| 3 * This file is the legal property of its developers. | |
| 4 * Please see the AUTHORS file distributed alongside this file. | |
| 5 * | |
| 6 * This library is free software; you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU Lesser General Public | |
| 8 * License as published by the Free Software Foundation; either | |
| 9 * version 2 of the License, or (at your option) any later version. | |
| 10 * | |
| 11 * This library is distributed in the hope that it will be useful, | |
| 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 * Lesser General Public License for more details. | |
| 15 * | |
| 16 * You should have received a copy of the GNU Lesser General Public | |
| 17 * License along with this library; if not, write to the Free Software | |
| 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 19 */ | |
| 20 | |
| 21 /* | |
| 22 * | |
| 23 * Various SNAC-related dodads... | |
| 24 * | |
| 25 * outstanding_snacs is a list of aim_snac_t structs. A SNAC should be added | |
| 26 * whenever a new SNAC is sent and it should remain in the list until the | |
| 27 * response for it has been received. | |
| 28 * | |
| 29 * cleansnacs() should be called periodically by the client in order | |
| 30 * to facilitate the aging out of unreplied-to SNACs. This can and does | |
| 31 * happen, so it should be handled. | |
| 32 * | |
| 33 */ | |
| 34 | |
| 35 #include "oscar.h" | |
| 36 | |
| 37 /* | |
| 38 * Called from oscar_session_new() to initialize the hash. | |
| 39 */ | |
| 40 void aim_initsnachash(OscarData *od) | |
| 41 { | |
| 42 int i; | |
| 43 | |
| 44 for (i = 0; i < FAIM_SNAC_HASH_SIZE; i++) | |
| 45 od->snac_hash[i] = NULL; | |
| 46 | |
| 47 return; | |
| 48 } | |
| 49 | |
| 50 aim_snacid_t aim_cachesnac(OscarData *od, const guint16 family, const guint16 type, const guint16 flags, const void *data, const int datalen) | |
| 51 { | |
| 52 aim_snac_t snac; | |
| 53 | |
| 54 snac.id = od->snacid_next++; | |
| 55 snac.family = family; | |
| 56 snac.type = type; | |
| 57 snac.flags = flags; | |
| 58 | |
| 59 if (datalen) { | |
| 60 if (!(snac.data = malloc(datalen))) | |
| 61 return 0; /* er... */ | |
| 62 memcpy(snac.data, data, datalen); | |
| 63 } else | |
| 64 snac.data = NULL; | |
| 65 | |
| 66 return aim_newsnac(od, &snac); | |
| 67 } | |
| 68 | |
| 69 /* | |
| 70 * Clones the passed snac structure and caches it in the | |
| 71 * list/hash. | |
| 72 */ | |
| 73 aim_snacid_t aim_newsnac(OscarData *od, aim_snac_t *newsnac) | |
| 74 { | |
| 75 aim_snac_t *snac; | |
| 76 int index; | |
| 77 | |
| 78 if (!newsnac) | |
| 79 return 0; | |
| 80 | |
| 81 if (!(snac = malloc(sizeof(aim_snac_t)))) | |
| 82 return 0; | |
| 83 memcpy(snac, newsnac, sizeof(aim_snac_t)); | |
| 84 snac->issuetime = time(NULL); | |
| 85 | |
| 86 index = snac->id % FAIM_SNAC_HASH_SIZE; | |
| 87 | |
| 88 snac->next = (aim_snac_t *)od->snac_hash[index]; | |
| 89 od->snac_hash[index] = (void *)snac; | |
| 90 | |
| 91 return snac->id; | |
| 92 } | |
| 93 | |
| 94 /* | |
| 95 * Finds a snac structure with the passed SNAC ID, | |
| 96 * removes it from the list/hash, and returns a pointer to it. | |
| 97 * | |
| 98 * The returned structure must be freed by the caller. | |
| 99 * | |
| 100 */ | |
| 101 aim_snac_t *aim_remsnac(OscarData *od, aim_snacid_t id) | |
| 102 { | |
| 103 aim_snac_t *cur, **prev; | |
| 104 int index; | |
| 105 | |
| 106 index = id % FAIM_SNAC_HASH_SIZE; | |
| 107 | |
| 108 for (prev = (aim_snac_t **)&od->snac_hash[index]; (cur = *prev); ) { | |
| 109 if (cur->id == id) { | |
| 110 *prev = cur->next; | |
| 111 if (cur->flags & AIM_SNACFLAGS_DESTRUCTOR) { | |
| 112 free(cur->data); | |
| 113 cur->data = NULL; | |
| 114 } | |
| 115 return cur; | |
| 116 } else | |
| 117 prev = &cur->next; | |
| 118 } | |
| 119 | |
| 120 return cur; | |
| 121 } | |
| 122 | |
| 123 /* | |
| 124 * This is for cleaning up old SNACs that either don't get replies or | |
| 125 * a reply was never received for. Garbage collection. Plain and simple. | |
| 126 * | |
| 127 * maxage is the _minimum_ age in seconds to keep SNACs. | |
| 128 * | |
| 129 */ | |
| 130 void aim_cleansnacs(OscarData *od, int maxage) | |
| 131 { | |
| 132 int i; | |
| 133 | |
| 134 for (i = 0; i < FAIM_SNAC_HASH_SIZE; i++) { | |
| 135 aim_snac_t *cur, **prev; | |
| 136 time_t curtime; | |
| 137 | |
| 138 if (!od->snac_hash[i]) | |
| 139 continue; | |
| 140 | |
| 141 curtime = time(NULL); /* done here in case we waited for the lock */ | |
| 142 | |
| 143 for (prev = (aim_snac_t **)&od->snac_hash[i]; (cur = *prev); ) { | |
| 144 if ((curtime - cur->issuetime) > maxage) { | |
| 145 | |
| 146 *prev = cur->next; | |
| 147 | |
| 148 free(cur->data); | |
| 149 free(cur); | |
| 150 } else | |
| 151 prev = &cur->next; | |
| 152 } | |
| 153 } | |
| 154 | |
| 155 return; | |
| 156 } | |
| 157 | |
| 158 int aim_putsnac(ByteStream *bs, guint16 family, guint16 subtype, guint16 flags, aim_snacid_t snacid) | |
| 159 { | |
| 160 | |
| 161 byte_stream_put16(bs, family); | |
| 162 byte_stream_put16(bs, subtype); | |
| 163 byte_stream_put16(bs, flags); | |
| 164 byte_stream_put32(bs, snacid); | |
| 165 | |
| 166 return 10; | |
| 167 } |
