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d7d7b7b9 | 1 | /* $Cambridge: exim/src/src/routers/ipliteral.c,v 1.8 2006/02/07 11:19:02 ph10 Exp $ */ |
0756eb3c PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
d7d7b7b9 | 7 | /* Copyright (c) University of Cambridge 1995 - 2006 */ |
0756eb3c PH |
8 | /* See the file NOTICE for conditions of use and distribution. */ |
9 | ||
10 | ||
11 | #include "../exim.h" | |
12 | #include "rf_functions.h" | |
13 | #include "ipliteral.h" | |
14 | ||
15 | ||
16 | /* Options specific to the ipliteral router. Because some compilers do not like | |
17 | empty declarations ("undefined" in the Standard) we put in a dummy value. */ | |
18 | ||
19 | optionlist ipliteral_router_options[] = { | |
20 | { "", opt_hidden, NULL } | |
21 | }; | |
22 | ||
23 | /* Size of the options list. An extern variable has to be used so that its | |
24 | address can appear in the tables drtables.c. */ | |
25 | ||
26 | int ipliteral_router_options_count = | |
27 | sizeof(ipliteral_router_options)/sizeof(optionlist); | |
28 | ||
29 | /* Default private options block for the ipliteral router. Again, a dummy | |
30 | value is present to keep some compilers happy. */ | |
31 | ||
32 | ipliteral_router_options_block ipliteral_router_option_defaults = { 0 }; | |
33 | ||
34 | ||
35 | ||
36 | /************************************************* | |
37 | * Initialization entry point * | |
38 | *************************************************/ | |
39 | ||
40 | /* Called for each instance, after its options have been read, to enable | |
41 | consistency checks to be done, or anything else that needs to be set up. */ | |
42 | ||
43 | void | |
44 | ipliteral_router_init(router_instance *rblock) | |
45 | { | |
46 | /* | |
47 | ipliteral_router_options_block *ob = | |
48 | (ipliteral_router_options_block *)(rblock->options_block); | |
49 | */ | |
50 | rblock = rblock; | |
51 | } | |
52 | ||
53 | ||
54 | ||
55 | /************************************************* | |
56 | * Main entry point * | |
57 | *************************************************/ | |
58 | ||
59 | /* See local README for interface details. This router returns: | |
60 | ||
61 | DECLINE | |
62 | . the domain is not in the form of an IP literal | |
63 | ||
64 | DEFER | |
65 | . verifying the errors address caused a deferment or a big disaster such | |
66 | as an expansion failure (rf_get_errors_address) | |
67 | . expanding a headers_{add,remove} string caused a deferment or another | |
68 | expansion error (rf_get_munge_headers) | |
69 | . a problem in rf_get_transport: no transport when one is needed; | |
70 | failed to expand dynamic transport; failed to find dynamic transport | |
71 | . failure to expand or find a uid/gid (rf_get_ugid via rf_queue_add) | |
72 | . self = "freeze", self = "defer" | |
73 | ||
74 | PASS | |
75 | . self = "pass" | |
76 | ||
77 | REROUTED | |
78 | . self = "reroute" | |
79 | ||
80 | FAIL | |
81 | . self = "fail" | |
82 | ||
83 | OK | |
84 | added address to addr_local or addr_remote, as appropriate for the | |
85 | type of transport; this includes the self="send" case. | |
86 | */ | |
87 | ||
88 | int | |
89 | ipliteral_router_entry( | |
90 | router_instance *rblock, /* data for this instantiation */ | |
91 | address_item *addr, /* address we are working on */ | |
92 | struct passwd *pw, /* passwd entry after check_local_user */ | |
fd6de02e | 93 | int verify, /* v_none/v_recipient/v_sender/v_expn */ |
0756eb3c PH |
94 | address_item **addr_local, /* add it to this if it's local */ |
95 | address_item **addr_remote, /* add it to this if it's remote */ | |
96 | address_item **addr_new, /* put new addresses on here */ | |
97 | address_item **addr_succeed) /* put old address here on success */ | |
98 | { | |
99 | /* | |
100 | ipliteral_router_options_block *ob = | |
101 | (ipliteral_router_options_block *)(rblock->options_block); | |
102 | */ | |
103 | host_item *h; | |
104 | uschar *domain = addr->domain; | |
f9daeae0 | 105 | uschar *ip; |
0756eb3c | 106 | int len = Ustrlen(domain); |
7e66e54d | 107 | int rc, ipv; |
0756eb3c PH |
108 | |
109 | addr_new = addr_new; /* Keep picky compilers happy */ | |
110 | addr_succeed = addr_succeed; | |
111 | ||
112 | DEBUG(D_route) debug_printf("%s router called for %s: domain = %s\n", | |
113 | rblock->name, addr->address, addr->domain); | |
114 | ||
f9daeae0 PH |
115 | /* Check that the domain is an IP address enclosed in square brackets. Remember |
116 | to allow for the "official" form of IPv6 addresses. If not, the router | |
117 | declines. Otherwise route to the single IP address, setting the host name to | |
118 | "(unnamed)". */ | |
0756eb3c PH |
119 | |
120 | if (domain[0] != '[' || domain[len-1] != ']') return DECLINE; | |
121 | domain[len-1] = 0; /* temporarily */ | |
122 | ||
f9daeae0 PH |
123 | ip = domain + 1; |
124 | if (strncmpic(ip, US"IPV6:", 5) == 0 || strncmpic(ip, US"IPV4:", 5) == 0) | |
125 | ip += 5; | |
126 | ||
7e66e54d PH |
127 | ipv = string_is_ip_address(ip, NULL); |
128 | if (ipv == 0 || (disable_ipv6 && ipv == 6)) | |
0756eb3c PH |
129 | { |
130 | domain[len-1] = ']'; | |
131 | return DECLINE; | |
132 | } | |
133 | ||
134 | /* It seems unlikely that ignore_target_hosts will be used with this router, | |
135 | but if it is set, it should probably work. */ | |
136 | ||
d4eb88df | 137 | if (verify_check_this_host(&(rblock->ignore_target_hosts), NULL, domain, |
f9daeae0 | 138 | ip, NULL) == OK) |
0756eb3c PH |
139 | { |
140 | DEBUG(D_route) | |
f9daeae0 | 141 | debug_printf("%s is in ignore_target_hosts\n", ip); |
0756eb3c PH |
142 | addr->message = US"IP literal host explicitly ignored"; |
143 | domain[len-1] = ']'; | |
144 | return DECLINE; | |
145 | } | |
146 | ||
147 | /* Set up a host item */ | |
148 | ||
149 | h = store_get(sizeof(host_item)); | |
150 | ||
151 | h->next = NULL; | |
f9daeae0 | 152 | h->address = string_copy(ip); |
0756eb3c PH |
153 | h->port = PORT_NONE; |
154 | domain[len-1] = ']'; /* restore */ | |
155 | h->name = string_copy(domain); | |
156 | h->mx = MX_NONE; | |
157 | h->status = hstatus_unknown; | |
158 | h->why = hwhy_unknown; | |
159 | h->last_try = 0; | |
160 | ||
161 | /* Determine whether the host is the local host, and if so, take action | |
162 | according to the configuration. */ | |
163 | ||
164 | if (host_scan_for_local_hosts(h, &h, NULL) == HOST_FOUND_LOCAL) | |
165 | { | |
166 | int rc = rf_self_action(addr, h, rblock->self_code, rblock->self_rewrite, | |
167 | rblock->self, addr_new); | |
168 | if (rc != OK) return rc; | |
169 | } | |
170 | ||
171 | /* Address is routed to this host */ | |
172 | ||
173 | addr->host_list = h; | |
174 | ||
175 | /* Set up the errors address, if any. */ | |
176 | ||
177 | rc = rf_get_errors_address(addr, rblock, verify, &(addr->p.errors_address)); | |
178 | if (rc != OK) return rc; | |
179 | ||
180 | /* Set up the additional and removeable headers for this address. */ | |
181 | ||
182 | rc = rf_get_munge_headers(addr, rblock, &(addr->p.extra_headers), | |
183 | &(addr->p.remove_headers)); | |
184 | if (rc != OK) return rc; | |
185 | ||
186 | /* Fill in the transport, queue the address for local or remote delivery, and | |
187 | yield success. For local delivery, of course, the IP address won't be used. If | |
188 | just verifying, there need not be a transport, in which case it doesn't matter | |
189 | which queue we put the address on. This is all now handled by the route_queue() | |
190 | function. */ | |
191 | ||
192 | if (!rf_get_transport(rblock->transport_name, &(rblock->transport), | |
193 | addr, rblock->name, NULL)) | |
194 | return DEFER; | |
195 | ||
196 | addr->transport = rblock->transport; | |
197 | ||
198 | return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)? | |
199 | OK : DEFER; | |
200 | } | |
201 | ||
202 | /* End of routers/ipliteral.c */ |