Commit | Line | Data |
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0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
3386088d | 5 | /* Copyright (c) University of Cambridge 1995 - 2015 */ |
0756eb3c PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | ||
9 | #include "../exim.h" | |
10 | #include "rf_functions.h" | |
11 | #include "ipliteral.h" | |
12 | ||
13 | ||
14 | /* Options specific to the ipliteral router. Because some compilers do not like | |
15 | empty declarations ("undefined" in the Standard) we put in a dummy value. */ | |
16 | ||
17 | optionlist ipliteral_router_options[] = { | |
18 | { "", opt_hidden, NULL } | |
19 | }; | |
20 | ||
21 | /* Size of the options list. An extern variable has to be used so that its | |
22 | address can appear in the tables drtables.c. */ | |
23 | ||
24 | int ipliteral_router_options_count = | |
25 | sizeof(ipliteral_router_options)/sizeof(optionlist); | |
26 | ||
27 | /* Default private options block for the ipliteral router. Again, a dummy | |
28 | value is present to keep some compilers happy. */ | |
29 | ||
30 | ipliteral_router_options_block ipliteral_router_option_defaults = { 0 }; | |
31 | ||
32 | ||
33 | ||
34 | /************************************************* | |
35 | * Initialization entry point * | |
36 | *************************************************/ | |
37 | ||
38 | /* Called for each instance, after its options have been read, to enable | |
39 | consistency checks to be done, or anything else that needs to be set up. */ | |
40 | ||
41 | void | |
42 | ipliteral_router_init(router_instance *rblock) | |
43 | { | |
44 | /* | |
45 | ipliteral_router_options_block *ob = | |
46 | (ipliteral_router_options_block *)(rblock->options_block); | |
47 | */ | |
48 | rblock = rblock; | |
49 | } | |
50 | ||
51 | ||
52 | ||
53 | /************************************************* | |
54 | * Main entry point * | |
55 | *************************************************/ | |
56 | ||
57 | /* See local README for interface details. This router returns: | |
58 | ||
59 | DECLINE | |
60 | . the domain is not in the form of an IP literal | |
61 | ||
62 | DEFER | |
63 | . verifying the errors address caused a deferment or a big disaster such | |
64 | as an expansion failure (rf_get_errors_address) | |
65 | . expanding a headers_{add,remove} string caused a deferment or another | |
66 | expansion error (rf_get_munge_headers) | |
67 | . a problem in rf_get_transport: no transport when one is needed; | |
68 | failed to expand dynamic transport; failed to find dynamic transport | |
69 | . failure to expand or find a uid/gid (rf_get_ugid via rf_queue_add) | |
70 | . self = "freeze", self = "defer" | |
71 | ||
72 | PASS | |
73 | . self = "pass" | |
74 | ||
75 | REROUTED | |
76 | . self = "reroute" | |
77 | ||
78 | FAIL | |
79 | . self = "fail" | |
80 | ||
81 | OK | |
82 | added address to addr_local or addr_remote, as appropriate for the | |
83 | type of transport; this includes the self="send" case. | |
84 | */ | |
85 | ||
86 | int | |
87 | ipliteral_router_entry( | |
88 | router_instance *rblock, /* data for this instantiation */ | |
89 | address_item *addr, /* address we are working on */ | |
90 | struct passwd *pw, /* passwd entry after check_local_user */ | |
fd6de02e | 91 | int verify, /* v_none/v_recipient/v_sender/v_expn */ |
0756eb3c PH |
92 | address_item **addr_local, /* add it to this if it's local */ |
93 | address_item **addr_remote, /* add it to this if it's remote */ | |
94 | address_item **addr_new, /* put new addresses on here */ | |
95 | address_item **addr_succeed) /* put old address here on success */ | |
96 | { | |
97 | /* | |
98 | ipliteral_router_options_block *ob = | |
99 | (ipliteral_router_options_block *)(rblock->options_block); | |
100 | */ | |
101 | host_item *h; | |
55414b25 JH |
102 | const uschar *domain = addr->domain; |
103 | const uschar *ip; | |
0756eb3c | 104 | int len = Ustrlen(domain); |
7e66e54d | 105 | int rc, ipv; |
0756eb3c PH |
106 | |
107 | addr_new = addr_new; /* Keep picky compilers happy */ | |
108 | addr_succeed = addr_succeed; | |
109 | ||
110 | DEBUG(D_route) debug_printf("%s router called for %s: domain = %s\n", | |
111 | rblock->name, addr->address, addr->domain); | |
112 | ||
f9daeae0 PH |
113 | /* Check that the domain is an IP address enclosed in square brackets. Remember |
114 | to allow for the "official" form of IPv6 addresses. If not, the router | |
115 | declines. Otherwise route to the single IP address, setting the host name to | |
116 | "(unnamed)". */ | |
0756eb3c PH |
117 | |
118 | if (domain[0] != '[' || domain[len-1] != ']') return DECLINE; | |
55414b25 | 119 | ip = string_copyn(domain+1, len-2); |
f9daeae0 PH |
120 | if (strncmpic(ip, US"IPV6:", 5) == 0 || strncmpic(ip, US"IPV4:", 5) == 0) |
121 | ip += 5; | |
122 | ||
7e66e54d PH |
123 | ipv = string_is_ip_address(ip, NULL); |
124 | if (ipv == 0 || (disable_ipv6 && ipv == 6)) | |
0756eb3c | 125 | return DECLINE; |
0756eb3c PH |
126 | |
127 | /* It seems unlikely that ignore_target_hosts will be used with this router, | |
128 | but if it is set, it should probably work. */ | |
129 | ||
55414b25 JH |
130 | if (verify_check_this_host(CUSS&rblock->ignore_target_hosts, |
131 | NULL, domain, ip, NULL) == OK) | |
0756eb3c PH |
132 | { |
133 | DEBUG(D_route) | |
f9daeae0 | 134 | debug_printf("%s is in ignore_target_hosts\n", ip); |
0756eb3c | 135 | addr->message = US"IP literal host explicitly ignored"; |
0756eb3c PH |
136 | return DECLINE; |
137 | } | |
138 | ||
139 | /* Set up a host item */ | |
140 | ||
141 | h = store_get(sizeof(host_item)); | |
142 | ||
143 | h->next = NULL; | |
f9daeae0 | 144 | h->address = string_copy(ip); |
0756eb3c | 145 | h->port = PORT_NONE; |
55414b25 | 146 | h->name = domain; |
0756eb3c PH |
147 | h->mx = MX_NONE; |
148 | h->status = hstatus_unknown; | |
149 | h->why = hwhy_unknown; | |
150 | h->last_try = 0; | |
151 | ||
152 | /* Determine whether the host is the local host, and if so, take action | |
153 | according to the configuration. */ | |
154 | ||
155 | if (host_scan_for_local_hosts(h, &h, NULL) == HOST_FOUND_LOCAL) | |
156 | { | |
157 | int rc = rf_self_action(addr, h, rblock->self_code, rblock->self_rewrite, | |
158 | rblock->self, addr_new); | |
159 | if (rc != OK) return rc; | |
160 | } | |
161 | ||
162 | /* Address is routed to this host */ | |
163 | ||
164 | addr->host_list = h; | |
165 | ||
166 | /* Set up the errors address, if any. */ | |
167 | ||
d43cbe25 | 168 | rc = rf_get_errors_address(addr, rblock, verify, &addr->prop.errors_address); |
0756eb3c PH |
169 | if (rc != OK) return rc; |
170 | ||
171 | /* Set up the additional and removeable headers for this address. */ | |
172 | ||
d43cbe25 JH |
173 | rc = rf_get_munge_headers(addr, rblock, &addr->prop.extra_headers, |
174 | &addr->prop.remove_headers); | |
0756eb3c PH |
175 | if (rc != OK) return rc; |
176 | ||
177 | /* Fill in the transport, queue the address for local or remote delivery, and | |
178 | yield success. For local delivery, of course, the IP address won't be used. If | |
179 | just verifying, there need not be a transport, in which case it doesn't matter | |
180 | which queue we put the address on. This is all now handled by the route_queue() | |
181 | function. */ | |
182 | ||
183 | if (!rf_get_transport(rblock->transport_name, &(rblock->transport), | |
184 | addr, rblock->name, NULL)) | |
185 | return DEFER; | |
186 | ||
187 | addr->transport = rblock->transport; | |
188 | ||
189 | return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)? | |
190 | OK : DEFER; | |
191 | } | |
192 | ||
193 | /* End of routers/ipliteral.c */ |