[5e53c4a] | 1 | /* |
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[862371b] | 2 | * rxhandlers.c |
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[5e53c4a] | 3 | * |
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| 4 | * This file contains most all of the incoming packet handlers, along |
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| 5 | * with aim_rxdispatch(), the Rx dispatcher. Queue/list management is |
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| 6 | * actually done in aim_rxqueue.c. |
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| 7 | * |
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| 8 | */ |
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| 9 | |
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| 10 | #define FAIM_INTERNAL |
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| 11 | #include <aim.h> |
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| 12 | |
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| 13 | struct aim_rxcblist_s { |
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| 14 | fu16_t family; |
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| 15 | fu16_t type; |
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| 16 | aim_rxcallback_t handler; |
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[e374dee] | 17 | fu16_t flags; |
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[5e53c4a] | 18 | struct aim_rxcblist_s *next; |
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| 19 | }; |
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| 20 | |
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| 21 | faim_internal aim_module_t *aim__findmodulebygroup(aim_session_t *sess, fu16_t group) |
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| 22 | { |
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| 23 | aim_module_t *cur; |
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| 24 | |
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| 25 | for (cur = (aim_module_t *)sess->modlistv; cur; cur = cur->next) { |
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| 26 | if (cur->family == group) |
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| 27 | return cur; |
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| 28 | } |
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| 29 | |
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| 30 | return NULL; |
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| 31 | } |
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| 32 | |
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| 33 | faim_internal aim_module_t *aim__findmodule(aim_session_t *sess, const char *name) |
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| 34 | { |
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| 35 | aim_module_t *cur; |
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| 36 | |
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| 37 | for (cur = (aim_module_t *)sess->modlistv; cur; cur = cur->next) { |
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| 38 | if (strcmp(name, cur->name) == 0) |
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| 39 | return cur; |
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| 40 | } |
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| 41 | |
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| 42 | return NULL; |
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| 43 | } |
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| 44 | |
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| 45 | faim_internal int aim__registermodule(aim_session_t *sess, int (*modfirst)(aim_session_t *, aim_module_t *)) |
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| 46 | { |
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| 47 | aim_module_t *mod; |
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| 48 | |
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| 49 | if (!sess || !modfirst) |
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| 50 | return -1; |
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| 51 | |
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| 52 | if (!(mod = malloc(sizeof(aim_module_t)))) |
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| 53 | return -1; |
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| 54 | memset(mod, 0, sizeof(aim_module_t)); |
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| 55 | |
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| 56 | if (modfirst(sess, mod) == -1) { |
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| 57 | free(mod); |
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| 58 | return -1; |
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| 59 | } |
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| 60 | |
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| 61 | if (aim__findmodule(sess, mod->name)) { |
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| 62 | if (mod->shutdown) |
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| 63 | mod->shutdown(sess, mod); |
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| 64 | free(mod); |
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| 65 | return -1; |
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| 66 | } |
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| 67 | |
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| 68 | mod->next = (aim_module_t *)sess->modlistv; |
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| 69 | (aim_module_t *)sess->modlistv = mod; |
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| 70 | |
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[862371b] | 71 | faimdprintf(sess, 1, "registered module %s (family 0x%04x, version = 0x%04x, tool 0x%04x, tool version 0x%04x)\n", mod->name, mod->family, mod->version, mod->toolid, mod->toolversion); |
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[5e53c4a] | 72 | |
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| 73 | return 0; |
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| 74 | } |
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| 75 | |
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| 76 | faim_internal void aim__shutdownmodules(aim_session_t *sess) |
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| 77 | { |
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| 78 | aim_module_t *cur; |
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| 79 | |
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| 80 | for (cur = (aim_module_t *)sess->modlistv; cur; ) { |
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| 81 | aim_module_t *tmp; |
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| 82 | |
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| 83 | tmp = cur->next; |
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| 84 | |
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| 85 | if (cur->shutdown) |
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| 86 | cur->shutdown(sess, cur); |
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| 87 | |
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| 88 | free(cur); |
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| 89 | |
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| 90 | cur = tmp; |
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| 91 | } |
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| 92 | |
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| 93 | sess->modlistv = NULL; |
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| 94 | |
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| 95 | return; |
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| 96 | } |
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| 97 | |
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| 98 | static int consumesnac(aim_session_t *sess, aim_frame_t *rx) |
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| 99 | { |
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| 100 | aim_module_t *cur; |
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| 101 | aim_modsnac_t snac; |
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| 102 | |
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| 103 | if (aim_bstream_empty(&rx->data) < 10) |
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| 104 | return 0; |
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| 105 | |
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| 106 | snac.family = aimbs_get16(&rx->data); |
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| 107 | snac.subtype = aimbs_get16(&rx->data); |
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| 108 | snac.flags = aimbs_get16(&rx->data); |
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| 109 | snac.id = aimbs_get32(&rx->data); |
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| 110 | |
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[e374dee] | 111 | /* SNAC flags are apparently uniform across all SNACs, so we handle them here */ |
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| 112 | if (snac.flags & 0x0001) { |
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| 113 | /* |
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| 114 | * This means the SNAC will be followed by another SNAC with |
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| 115 | * related information. We don't need to do anything about |
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| 116 | * this here. |
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| 117 | */ |
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| 118 | } |
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| 119 | if (snac.flags & 0x8000) { |
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| 120 | /* |
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| 121 | * This packet contains the version of the family that this SNAC is |
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| 122 | * in. You get this when your SSI module is version 2 or higher. |
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| 123 | * For now we have no need for this, but you could always save |
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| 124 | * it as a part of aim_modnsac_t, or something. The format is... |
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| 125 | * 2 byte length of total mini-header (which is 6 bytes), then TLV |
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| 126 | * of type 0x0001, length 0x0002, value is the 2 byte version |
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| 127 | * number |
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| 128 | */ |
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| 129 | aim_bstream_advance(&rx->data, aimbs_get16(&rx->data)); |
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| 130 | } |
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| 131 | |
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[5e53c4a] | 132 | for (cur = (aim_module_t *)sess->modlistv; cur; cur = cur->next) { |
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| 133 | |
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| 134 | if (!(cur->flags & AIM_MODFLAG_MULTIFAMILY) && |
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| 135 | (cur->family != snac.family)) |
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| 136 | continue; |
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| 137 | |
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| 138 | if (cur->snachandler(sess, cur, rx, &snac, &rx->data)) |
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| 139 | return 1; |
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| 140 | |
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| 141 | } |
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| 142 | |
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| 143 | return 0; |
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| 144 | } |
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| 145 | |
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| 146 | static int consumenonsnac(aim_session_t *sess, aim_frame_t *rx, fu16_t family, fu16_t subtype) |
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| 147 | { |
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| 148 | aim_module_t *cur; |
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| 149 | aim_modsnac_t snac; |
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| 150 | |
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| 151 | snac.family = family; |
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| 152 | snac.subtype = subtype; |
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| 153 | snac.flags = snac.id = 0; |
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| 154 | |
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| 155 | for (cur = (aim_module_t *)sess->modlistv; cur; cur = cur->next) { |
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| 156 | |
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| 157 | if (!(cur->flags & AIM_MODFLAG_MULTIFAMILY) && |
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| 158 | (cur->family != snac.family)) |
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| 159 | continue; |
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| 160 | |
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| 161 | if (cur->snachandler(sess, cur, rx, &snac, &rx->data)) |
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| 162 | return 1; |
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| 163 | |
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| 164 | } |
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| 165 | |
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| 166 | return 0; |
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| 167 | } |
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| 168 | |
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| 169 | static int negchan_middle(aim_session_t *sess, aim_frame_t *fr) |
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| 170 | { |
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| 171 | aim_tlvlist_t *tlvlist; |
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| 172 | char *msg = NULL; |
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| 173 | fu16_t code = 0; |
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| 174 | aim_rxcallback_t userfunc; |
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| 175 | int ret = 1; |
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| 176 | |
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| 177 | if (aim_bstream_empty(&fr->data) == 0) { |
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| 178 | /* XXX should do something with this */ |
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| 179 | return 1; |
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| 180 | } |
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| 181 | |
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| 182 | /* Used only by the older login protocol */ |
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| 183 | /* XXX remove this special case? */ |
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| 184 | if (fr->conn->type == AIM_CONN_TYPE_AUTH) |
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| 185 | return consumenonsnac(sess, fr, 0x0017, 0x0003); |
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| 186 | |
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[cf02dd6] | 187 | tlvlist = aim_tlvlist_read(&fr->data); |
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[5e53c4a] | 188 | |
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[cf02dd6] | 189 | if (aim_tlv_gettlv(tlvlist, 0x0009, 1)) |
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| 190 | code = aim_tlv_get16(tlvlist, 0x0009, 1); |
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[5e53c4a] | 191 | |
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[cf02dd6] | 192 | if (aim_tlv_gettlv(tlvlist, 0x000b, 1)) |
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| 193 | msg = aim_tlv_getstr(tlvlist, 0x000b, 1); |
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[5e53c4a] | 194 | |
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| 195 | if ((userfunc = aim_callhandler(sess, fr->conn, AIM_CB_FAM_SPECIAL, AIM_CB_SPECIAL_CONNERR))) |
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| 196 | ret = userfunc(sess, fr, code, msg); |
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| 197 | |
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[cf02dd6] | 198 | aim_tlvlist_free(&tlvlist); |
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[5e53c4a] | 199 | |
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| 200 | free(msg); |
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| 201 | |
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| 202 | return ret; |
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| 203 | } |
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| 204 | |
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| 205 | /* |
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| 206 | * Bleck functions get called when there's no non-bleck functions |
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| 207 | * around to cleanup the mess... |
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| 208 | */ |
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| 209 | faim_internal int bleck(aim_session_t *sess, aim_frame_t *frame, ...) |
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| 210 | { |
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| 211 | fu16_t family, subtype; |
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| 212 | fu16_t maxf, maxs; |
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| 213 | |
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| 214 | static const char *channels[6] = { |
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| 215 | "Invalid (0)", |
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| 216 | "FLAP Version", |
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| 217 | "SNAC", |
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| 218 | "Invalid (3)", |
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| 219 | "Negotiation", |
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| 220 | "FLAP NOP" |
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| 221 | }; |
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| 222 | static const int maxchannels = 5; |
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| 223 | |
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| 224 | /* XXX: this is ugly. and big just for debugging. */ |
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| 225 | static const char *literals[14][25] = { |
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| 226 | {"Invalid", |
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| 227 | NULL |
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| 228 | }, |
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| 229 | {"General", |
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| 230 | "Invalid", |
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| 231 | "Error", |
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| 232 | "Client Ready", |
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| 233 | "Server Ready", |
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| 234 | "Service Request", |
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| 235 | "Redirect", |
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| 236 | "Rate Information Request", |
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| 237 | "Rate Information", |
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| 238 | "Rate Information Ack", |
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| 239 | NULL, |
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| 240 | "Rate Information Change", |
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| 241 | "Server Pause", |
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| 242 | NULL, |
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| 243 | "Server Resume", |
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| 244 | "Request Personal User Information", |
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| 245 | "Personal User Information", |
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| 246 | "Evil Notification", |
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| 247 | NULL, |
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| 248 | "Migration notice", |
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| 249 | "Message of the Day", |
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| 250 | "Set Privacy Flags", |
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| 251 | "Well Known URL", |
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| 252 | "NOP" |
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| 253 | }, |
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| 254 | {"Location", |
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| 255 | "Invalid", |
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| 256 | "Error", |
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| 257 | "Request Rights", |
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| 258 | "Rights Information", |
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| 259 | "Set user information", |
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| 260 | "Request User Information", |
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| 261 | "User Information", |
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| 262 | "Watcher Sub Request", |
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| 263 | "Watcher Notification" |
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| 264 | }, |
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| 265 | {"Buddy List Management", |
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| 266 | "Invalid", |
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| 267 | "Error", |
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| 268 | "Request Rights", |
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| 269 | "Rights Information", |
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| 270 | "Add Buddy", |
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| 271 | "Remove Buddy", |
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| 272 | "Watcher List Query", |
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| 273 | "Watcher List Response", |
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| 274 | "Watcher SubRequest", |
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| 275 | "Watcher Notification", |
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| 276 | "Reject Notification", |
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| 277 | "Oncoming Buddy", |
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| 278 | "Offgoing Buddy" |
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| 279 | }, |
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| 280 | {"Messeging", |
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| 281 | "Invalid", |
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| 282 | "Error", |
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| 283 | "Add ICBM Parameter", |
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| 284 | "Remove ICBM Parameter", |
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| 285 | "Request Parameter Information", |
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| 286 | "Parameter Information", |
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| 287 | "Outgoing Message", |
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| 288 | "Incoming Message", |
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| 289 | "Evil Request", |
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| 290 | "Evil Reply", |
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| 291 | "Missed Calls", |
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| 292 | "Message Error", |
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| 293 | "Host Ack" |
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| 294 | }, |
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| 295 | {"Advertisements", |
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| 296 | "Invalid", |
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| 297 | "Error", |
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| 298 | "Request Ad", |
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| 299 | "Ad Data (GIFs)" |
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| 300 | }, |
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| 301 | {"Invitation / Client-to-Client", |
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| 302 | "Invalid", |
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| 303 | "Error", |
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| 304 | "Invite a Friend", |
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| 305 | "Invitation Ack" |
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| 306 | }, |
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| 307 | {"Administrative", |
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| 308 | "Invalid", |
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| 309 | "Error", |
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| 310 | "Information Request", |
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| 311 | "Information Reply", |
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| 312 | "Information Change Request", |
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| 313 | "Information Chat Reply", |
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| 314 | "Account Confirm Request", |
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| 315 | "Account Confirm Reply", |
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| 316 | "Account Delete Request", |
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| 317 | "Account Delete Reply" |
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| 318 | }, |
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| 319 | {"Popups", |
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| 320 | "Invalid", |
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| 321 | "Error", |
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| 322 | "Display Popup" |
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| 323 | }, |
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| 324 | {"BOS", |
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| 325 | "Invalid", |
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| 326 | "Error", |
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| 327 | "Request Rights", |
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| 328 | "Rights Response", |
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| 329 | "Set group permission mask", |
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| 330 | "Add permission list entries", |
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| 331 | "Delete permission list entries", |
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| 332 | "Add deny list entries", |
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| 333 | "Delete deny list entries", |
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| 334 | "Server Error" |
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| 335 | }, |
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| 336 | {"User Lookup", |
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| 337 | "Invalid", |
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| 338 | "Error", |
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| 339 | "Search Request", |
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| 340 | "Search Response" |
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| 341 | }, |
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| 342 | {"Stats", |
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| 343 | "Invalid", |
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| 344 | "Error", |
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| 345 | "Set minimum report interval", |
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| 346 | "Report Events" |
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| 347 | }, |
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| 348 | {"Translate", |
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| 349 | "Invalid", |
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| 350 | "Error", |
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| 351 | "Translate Request", |
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| 352 | "Translate Reply", |
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| 353 | }, |
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| 354 | {"Chat Navigation", |
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| 355 | "Invalid", |
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| 356 | "Error", |
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| 357 | "Request rights", |
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| 358 | "Request Exchange Information", |
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| 359 | "Request Room Information", |
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| 360 | "Request Occupant List", |
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| 361 | "Search for Room", |
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| 362 | "Outgoing Message", |
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| 363 | "Incoming Message", |
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| 364 | "Evil Request", |
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| 365 | "Evil Reply", |
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| 366 | "Chat Error", |
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| 367 | } |
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| 368 | }; |
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| 369 | |
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| 370 | maxf = sizeof(literals) / sizeof(literals[0]); |
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| 371 | maxs = sizeof(literals[0]) / sizeof(literals[0][0]); |
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| 372 | |
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| 373 | if (frame->hdr.flap.type == 0x02) { |
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| 374 | |
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| 375 | family = aimbs_get16(&frame->data); |
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| 376 | subtype = aimbs_get16(&frame->data); |
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| 377 | |
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| 378 | if ((family < maxf) && (subtype+1 < maxs) && (literals[family][subtype] != NULL)) |
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| 379 | faimdprintf(sess, 0, "bleck: channel %s: null handler for %04x/%04x (%s)\n", channels[frame->hdr.flap.type], family, subtype, literals[family][subtype+1]); |
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| 380 | else |
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| 381 | faimdprintf(sess, 0, "bleck: channel %s: null handler for %04x/%04x (no literal)\n", channels[frame->hdr.flap.type], family, subtype); |
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| 382 | } else { |
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| 383 | |
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| 384 | if (frame->hdr.flap.type <= maxchannels) |
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| 385 | faimdprintf(sess, 0, "bleck: channel %s (0x%02x)\n", channels[frame->hdr.flap.type], frame->hdr.flap.type); |
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| 386 | else |
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| 387 | faimdprintf(sess, 0, "bleck: unknown channel 0x%02x\n", frame->hdr.flap.type); |
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| 388 | |
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| 389 | } |
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| 390 | |
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| 391 | return 1; |
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| 392 | } |
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| 393 | |
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| 394 | faim_export int aim_conn_addhandler(aim_session_t *sess, aim_conn_t *conn, fu16_t family, fu16_t type, aim_rxcallback_t newhandler, fu16_t flags) |
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| 395 | { |
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| 396 | struct aim_rxcblist_s *newcb; |
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| 397 | |
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| 398 | if (!conn) |
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| 399 | return -1; |
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| 400 | |
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| 401 | faimdprintf(sess, 1, "aim_conn_addhandler: adding for %04x/%04x\n", family, type); |
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| 402 | |
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| 403 | if (!(newcb = (struct aim_rxcblist_s *)calloc(1, sizeof(struct aim_rxcblist_s)))) |
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| 404 | return -1; |
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| 405 | |
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| 406 | newcb->family = family; |
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| 407 | newcb->type = type; |
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| 408 | newcb->flags = flags; |
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| 409 | newcb->handler = newhandler ? newhandler : bleck; |
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| 410 | newcb->next = NULL; |
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| 411 | |
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| 412 | if (!conn->handlerlist) |
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| 413 | conn->handlerlist = (void *)newcb; |
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| 414 | else { |
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| 415 | struct aim_rxcblist_s *cur; |
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| 416 | |
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| 417 | for (cur = (struct aim_rxcblist_s *)conn->handlerlist; cur->next; cur = cur->next) |
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| 418 | ; |
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| 419 | cur->next = newcb; |
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| 420 | } |
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| 421 | |
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| 422 | return 0; |
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| 423 | } |
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| 424 | |
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| 425 | faim_export int aim_clearhandlers(aim_conn_t *conn) |
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| 426 | { |
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| 427 | struct aim_rxcblist_s *cur; |
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| 428 | |
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| 429 | if (!conn) |
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| 430 | return -1; |
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| 431 | |
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| 432 | for (cur = (struct aim_rxcblist_s *)conn->handlerlist; cur; ) { |
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| 433 | struct aim_rxcblist_s *tmp; |
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| 434 | |
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| 435 | tmp = cur->next; |
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| 436 | free(cur); |
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| 437 | cur = tmp; |
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| 438 | } |
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| 439 | conn->handlerlist = NULL; |
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| 440 | |
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| 441 | return 0; |
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| 442 | } |
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| 443 | |
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| 444 | faim_internal aim_rxcallback_t aim_callhandler(aim_session_t *sess, aim_conn_t *conn, fu16_t family, fu16_t type) |
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| 445 | { |
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| 446 | struct aim_rxcblist_s *cur; |
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| 447 | |
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| 448 | if (!conn) |
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| 449 | return NULL; |
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| 450 | |
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| 451 | faimdprintf(sess, 1, "aim_callhandler: calling for %04x/%04x\n", family, type); |
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| 452 | |
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| 453 | for (cur = (struct aim_rxcblist_s *)conn->handlerlist; cur; cur = cur->next) { |
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| 454 | if ((cur->family == family) && (cur->type == type)) |
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| 455 | return cur->handler; |
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| 456 | } |
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| 457 | |
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| 458 | if (type == AIM_CB_SPECIAL_DEFAULT) { |
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| 459 | faimdprintf(sess, 1, "aim_callhandler: no default handler for family 0x%04x\n", family); |
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| 460 | return NULL; /* prevent infinite recursion */ |
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| 461 | } |
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| 462 | |
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| 463 | faimdprintf(sess, 1, "aim_callhandler: no handler for 0x%04x/0x%04x\n", family, type); |
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| 464 | |
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| 465 | return aim_callhandler(sess, conn, family, AIM_CB_SPECIAL_DEFAULT); |
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| 466 | } |
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| 467 | |
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| 468 | faim_internal void aim_clonehandlers(aim_session_t *sess, aim_conn_t *dest, aim_conn_t *src) |
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| 469 | { |
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| 470 | struct aim_rxcblist_s *cur; |
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| 471 | |
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| 472 | for (cur = (struct aim_rxcblist_s *)src->handlerlist; cur; cur = cur->next) { |
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| 473 | aim_conn_addhandler(sess, dest, cur->family, cur->type, |
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| 474 | cur->handler, cur->flags); |
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| 475 | } |
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| 476 | |
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| 477 | return; |
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| 478 | } |
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| 479 | |
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| 480 | faim_internal int aim_callhandler_noparam(aim_session_t *sess, aim_conn_t *conn,fu16_t family, fu16_t type, aim_frame_t *ptr) |
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| 481 | { |
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| 482 | aim_rxcallback_t userfunc; |
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| 483 | |
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| 484 | if ((userfunc = aim_callhandler(sess, conn, family, type))) |
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| 485 | return userfunc(sess, ptr); |
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| 486 | |
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| 487 | return 1; /* XXX */ |
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| 488 | } |
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| 489 | |
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| 490 | /* |
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| 491 | * aim_rxdispatch() |
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| 492 | * |
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| 493 | * Basically, heres what this should do: |
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| 494 | * 1) Determine correct packet handler for this packet |
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| 495 | * 2) Mark the packet handled (so it can be dequeued in purge_queue()) |
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| 496 | * 3) Send the packet to the packet handler |
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| 497 | * 4) Go to next packet in the queue and start over |
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| 498 | * 5) When done, run purge_queue() to purge handled commands |
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| 499 | * |
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| 500 | * TODO: Clean up. |
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| 501 | * TODO: More support for mid-level handlers. |
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| 502 | * TODO: Allow for NULL handlers. |
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| 503 | * |
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| 504 | */ |
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| 505 | faim_export void aim_rxdispatch(aim_session_t *sess) |
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| 506 | { |
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| 507 | int i; |
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| 508 | aim_frame_t *cur; |
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| 509 | |
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| 510 | for (cur = sess->queue_incoming, i = 0; cur; cur = cur->next, i++) { |
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| 511 | |
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| 512 | /* |
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| 513 | * XXX: This is still fairly ugly. |
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| 514 | */ |
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| 515 | |
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| 516 | if (cur->handled) |
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| 517 | continue; |
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| 518 | |
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[e374dee] | 519 | if (cur->hdrtype == AIM_FRAMETYPE_FLAP) { |
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| 520 | if (cur->hdr.flap.type == 0x01) { |
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| 521 | cur->handled = aim_callhandler_noparam(sess, cur->conn, AIM_CB_FAM_SPECIAL, AIM_CB_SPECIAL_FLAPVER, cur); /* XXX use consumenonsnac */ |
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| 522 | continue; |
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[5e53c4a] | 523 | |
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[e374dee] | 524 | } else if (cur->hdr.flap.type == 0x02) { |
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| 525 | if ((cur->handled = consumesnac(sess, cur))) |
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| 526 | continue; |
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[5e53c4a] | 527 | |
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[e374dee] | 528 | } else if (cur->hdr.flap.type == 0x04) { |
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| 529 | cur->handled = negchan_middle(sess, cur); |
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| 530 | continue; |
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[5e53c4a] | 531 | |
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[e374dee] | 532 | } else if (cur->hdr.flap.type == 0x05) { |
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[5e53c4a] | 533 | |
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[e374dee] | 534 | } |
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[5e53c4a] | 535 | |
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[e374dee] | 536 | } else if (cur->hdrtype == AIM_FRAMETYPE_OFT) { |
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| 537 | if (cur->conn->type == AIM_CONN_TYPE_RENDEZVOUS) { |
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| 538 | aim_rxdispatch_rendezvous(sess, cur); |
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| 539 | cur->handled = 1; |
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| 540 | continue; |
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[5e53c4a] | 541 | |
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[e374dee] | 542 | } else if (cur->conn->type == AIM_CONN_TYPE_LISTENER) { |
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| 543 | /* not possible */ |
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| 544 | faimdprintf(sess, 0, "rxdispatch called on LISTENER connection!\n"); |
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| 545 | cur->handled = 1; |
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| 546 | continue; |
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| 547 | } |
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| 548 | } |
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[5e53c4a] | 549 | |
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| 550 | if (!cur->handled) { |
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| 551 | consumenonsnac(sess, cur, 0xffff, 0xffff); /* last chance! */ |
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| 552 | cur->handled = 1; |
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| 553 | } |
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| 554 | } |
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| 555 | |
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| 556 | /* |
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| 557 | * This doesn't have to be called here. It could easily be done |
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| 558 | * by a seperate thread or something. It's an administrative operation, |
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| 559 | * and can take a while. Though the less you call it the less memory |
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| 560 | * you'll have :) |
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| 561 | */ |
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| 562 | aim_purge_rxqueue(sess); |
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| 563 | |
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| 564 | return; |
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| 565 | } |
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| 566 | |
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| 567 | faim_internal int aim_parse_unknown(aim_session_t *sess, aim_frame_t *frame, ...) |
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| 568 | { |
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| 569 | int i; |
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| 570 | |
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| 571 | faimdprintf(sess, 1, "\nRecieved unknown packet:"); |
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| 572 | |
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| 573 | for (i = 0; aim_bstream_empty(&frame->data); i++) { |
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| 574 | if ((i % 8) == 0) |
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| 575 | faimdprintf(sess, 1, "\n\t"); |
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| 576 | |
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| 577 | faimdprintf(sess, 1, "0x%2x ", aimbs_get8(&frame->data)); |
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| 578 | } |
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| 579 | |
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| 580 | faimdprintf(sess, 1, "\n\n"); |
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| 581 | |
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| 582 | return 1; |
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| 583 | } |
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