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Commit | Line | Data |
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9de3ca7e | 1 | /* |
2 | * | |
3 | * Various SNAC-related dodads... | |
4 | * | |
5 | * outstanding_snacs is a list of aim_snac_t structs. A SNAC should be added | |
6 | * whenever a new SNAC is sent and it should remain in the list until the | |
b13c9e13 | 7 | * response for it has been receieved. |
9de3ca7e | 8 | * |
b13c9e13 | 9 | * cleansnacs() should be called periodically by the client in order |
10 | * to facilitate the aging out of unreplied-to SNACs. This can and does | |
11 | * happen, so it should be handled. | |
9de3ca7e | 12 | * |
13 | */ | |
14 | ||
37ee990e | 15 | #define FAIM_INTERNAL |
dd60ff8b | 16 | #include <aim.h> |
9de3ca7e | 17 | |
b13c9e13 | 18 | /* |
19 | * Called from aim_session_init() to initialize the hash. | |
20 | */ | |
d410cf58 | 21 | faim_internal void aim_initsnachash(aim_session_t *sess) |
b13c9e13 | 22 | { |
d410cf58 | 23 | int i; |
b13c9e13 | 24 | |
d410cf58 | 25 | for (i = 0; i < FAIM_SNAC_HASH_SIZE; i++) { |
26 | sess->snac_hash[i] = NULL; | |
27 | faim_mutex_init(&sess->snac_hash_locks[i]); | |
28 | } | |
b13c9e13 | 29 | |
d410cf58 | 30 | return; |
b13c9e13 | 31 | } |
32 | ||
d410cf58 | 33 | faim_internal aim_snacid_t aim_cachesnac(aim_session_t *sess, const fu16_t family, const fu16_t type, const fu16_t flags, const void *data, const int datalen) |
1ea867e3 | 34 | { |
d410cf58 | 35 | aim_snac_t snac; |
1ea867e3 | 36 | |
d410cf58 | 37 | snac.id = sess->snacid_next++; |
38 | snac.family = family; | |
39 | snac.type = type; | |
40 | snac.flags = flags; | |
1ea867e3 | 41 | |
d410cf58 | 42 | if (datalen) { |
43 | if (!(snac.data = malloc(datalen))) | |
44 | return 0; /* er... */ | |
45 | memcpy(snac.data, data, datalen); | |
46 | } else | |
47 | snac.data = NULL; | |
1ea867e3 | 48 | |
d410cf58 | 49 | return aim_newsnac(sess, &snac); |
1ea867e3 | 50 | } |
51 | ||
b13c9e13 | 52 | /* |
53 | * Clones the passed snac structure and caches it in the | |
54 | * list/hash. | |
55 | */ | |
d410cf58 | 56 | faim_internal aim_snacid_t aim_newsnac(aim_session_t *sess, aim_snac_t *newsnac) |
a25832e6 | 57 | { |
d410cf58 | 58 | aim_snac_t *snac; |
59 | int index; | |
b13c9e13 | 60 | |
d410cf58 | 61 | if (!newsnac) |
62 | return 0; | |
9de3ca7e | 63 | |
d410cf58 | 64 | if (!(snac = malloc(sizeof(aim_snac_t)))) |
65 | return 0; | |
66 | memcpy(snac, newsnac, sizeof(aim_snac_t)); | |
67 | snac->issuetime = time(NULL); | |
b13c9e13 | 68 | |
d410cf58 | 69 | index = snac->id % FAIM_SNAC_HASH_SIZE; |
b13c9e13 | 70 | |
d410cf58 | 71 | faim_mutex_lock(&sess->snac_hash_locks[index]); |
72 | snac->next = (aim_snac_t *)sess->snac_hash[index]; | |
73 | sess->snac_hash[index] = (void *)snac; | |
74 | faim_mutex_unlock(&sess->snac_hash_locks[index]); | |
5b401785 | 75 | |
d410cf58 | 76 | return snac->id; |
a25832e6 | 77 | } |
9de3ca7e | 78 | |
b13c9e13 | 79 | /* |
80 | * Finds a snac structure with the passed SNAC ID, | |
81 | * removes it from the list/hash, and returns a pointer to it. | |
82 | * | |
83 | * The returned structure must be freed by the caller. | |
84 | * | |
85 | */ | |
d410cf58 | 86 | faim_internal aim_snac_t *aim_remsnac(aim_session_t *sess, aim_snacid_t id) |
a25832e6 | 87 | { |
d410cf58 | 88 | aim_snac_t *cur, **prev; |
89 | int index; | |
90 | ||
91 | index = id % FAIM_SNAC_HASH_SIZE; | |
92 | ||
93 | faim_mutex_lock(&sess->snac_hash_locks[index]); | |
94 | for (prev = (aim_snac_t **)&sess->snac_hash[index]; (cur = *prev); ) { | |
95 | if (cur->id == id) { | |
96 | *prev = cur->next; | |
97 | return cur; | |
98 | } else | |
99 | prev = &cur->next; | |
100 | } | |
101 | faim_mutex_unlock(&sess->snac_hash_locks[index]); | |
102 | ||
103 | return cur; | |
9de3ca7e | 104 | } |
105 | ||
106 | /* | |
107 | * This is for cleaning up old SNACs that either don't get replies or | |
108 | * a reply was never received for. Garabage collection. Plain and simple. | |
109 | * | |
b13c9e13 | 110 | * maxage is the _minimum_ age in seconds to keep SNACs. |
9de3ca7e | 111 | * |
112 | */ | |
d410cf58 | 113 | faim_internal void aim_cleansnacs(aim_session_t *sess, int maxage) |
9de3ca7e | 114 | { |
d410cf58 | 115 | int i; |
b13c9e13 | 116 | |
d410cf58 | 117 | for (i = 0; i < FAIM_SNAC_HASH_SIZE; i++) { |
118 | aim_snac_t *cur, **prev; | |
119 | time_t curtime; | |
53c935f8 | 120 | |
d410cf58 | 121 | faim_mutex_lock(&sess->snac_hash_locks[i]); |
122 | if (!sess->snac_hash[i]) { | |
123 | faim_mutex_unlock(&sess->snac_hash_locks[i]); | |
124 | continue; | |
125 | } | |
96f8b1ed | 126 | |
d410cf58 | 127 | curtime = time(NULL); /* done here in case we waited for the lock */ |
96f8b1ed | 128 | |
d410cf58 | 129 | for (prev = (aim_snac_t **)&sess->snac_hash[i]; (cur = *prev); ) { |
130 | if ((curtime - cur->issuetime) > maxage) { | |
37ee990e | 131 | |
d410cf58 | 132 | *prev = cur->next; |
96f8b1ed | 133 | |
d410cf58 | 134 | /* XXX should we have destructors here? */ |
135 | free(cur->data); | |
136 | free(cur); | |
96f8b1ed | 137 | |
d410cf58 | 138 | } else |
139 | prev = &cur->next; | |
140 | } | |
141 | faim_mutex_unlock(&sess->snac_hash_locks[i]); | |
142 | } | |
96f8b1ed | 143 | |
d410cf58 | 144 | return; |
9de3ca7e | 145 | } |
146 | ||
d410cf58 | 147 | faim_internal int aim_putsnac(aim_bstream_t *bs, fu16_t family, fu16_t subtype, fu16_t flags, aim_snacid_t snacid) |
9de3ca7e | 148 | { |
d410cf58 | 149 | |
150 | aimbs_put16(bs, family); | |
151 | aimbs_put16(bs, subtype); | |
152 | aimbs_put16(bs, flags); | |
153 | aimbs_put32(bs, snacid); | |
154 | ||
155 | return 10; | |
9de3ca7e | 156 | } |