Commit | Line | Data |
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0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
1e1ddfac | 6 | /* Copyright (c) The Exim Maintainers 2020 */ |
0756eb3c PH |
7 | /* See the file NOTICE for conditions of use and distribution. */ |
8 | ||
9 | ||
10 | #include "../exim.h" | |
11 | #include "rf_functions.h" | |
12 | #include "ipliteral.h" | |
13 | ||
14 | ||
15 | /* Options specific to the ipliteral router. Because some compilers do not like | |
16 | empty declarations ("undefined" in the Standard) we put in a dummy value. */ | |
17 | ||
18 | optionlist ipliteral_router_options[] = { | |
23f2e90d | 19 | { "", opt_hidden, {NULL} } |
0756eb3c PH |
20 | }; |
21 | ||
22 | /* Size of the options list. An extern variable has to be used so that its | |
23 | address can appear in the tables drtables.c. */ | |
24 | ||
25 | int ipliteral_router_options_count = | |
26 | sizeof(ipliteral_router_options)/sizeof(optionlist); | |
27 | ||
28 | /* Default private options block for the ipliteral router. Again, a dummy | |
29 | value is present to keep some compilers happy. */ | |
30 | ||
31 | ipliteral_router_options_block ipliteral_router_option_defaults = { 0 }; | |
32 | ||
33 | ||
d185889f JH |
34 | #ifdef MACRO_PREDEF |
35 | ||
36 | /* Dummy entries */ | |
37 | void ipliteral_router_init(router_instance *rblock) {} | |
38 | int ipliteral_router_entry(router_instance *rblock, address_item *addr, | |
39 | struct passwd *pw, int verify, address_item **addr_local, | |
40 | address_item **addr_remote, address_item **addr_new, | |
cab0c277 | 41 | address_item **addr_succeed) {return 0;} |
d185889f JH |
42 | |
43 | #else /*!MACRO_PREDEF*/ | |
44 | ||
0756eb3c PH |
45 | |
46 | /************************************************* | |
47 | * Initialization entry point * | |
48 | *************************************************/ | |
49 | ||
50 | /* Called for each instance, after its options have been read, to enable | |
51 | consistency checks to be done, or anything else that needs to be set up. */ | |
52 | ||
53 | void | |
54 | ipliteral_router_init(router_instance *rblock) | |
55 | { | |
56 | /* | |
57 | ipliteral_router_options_block *ob = | |
58 | (ipliteral_router_options_block *)(rblock->options_block); | |
59 | */ | |
60 | rblock = rblock; | |
61 | } | |
62 | ||
63 | ||
64 | ||
65 | /************************************************* | |
66 | * Main entry point * | |
67 | *************************************************/ | |
68 | ||
69 | /* See local README for interface details. This router returns: | |
70 | ||
71 | DECLINE | |
72 | . the domain is not in the form of an IP literal | |
73 | ||
74 | DEFER | |
75 | . verifying the errors address caused a deferment or a big disaster such | |
76 | as an expansion failure (rf_get_errors_address) | |
77 | . expanding a headers_{add,remove} string caused a deferment or another | |
78 | expansion error (rf_get_munge_headers) | |
79 | . a problem in rf_get_transport: no transport when one is needed; | |
80 | failed to expand dynamic transport; failed to find dynamic transport | |
81 | . failure to expand or find a uid/gid (rf_get_ugid via rf_queue_add) | |
82 | . self = "freeze", self = "defer" | |
83 | ||
84 | PASS | |
85 | . self = "pass" | |
86 | ||
87 | REROUTED | |
88 | . self = "reroute" | |
89 | ||
90 | FAIL | |
91 | . self = "fail" | |
92 | ||
93 | OK | |
94 | added address to addr_local or addr_remote, as appropriate for the | |
95 | type of transport; this includes the self="send" case. | |
96 | */ | |
97 | ||
98 | int | |
99 | ipliteral_router_entry( | |
100 | router_instance *rblock, /* data for this instantiation */ | |
101 | address_item *addr, /* address we are working on */ | |
102 | struct passwd *pw, /* passwd entry after check_local_user */ | |
fd6de02e | 103 | int verify, /* v_none/v_recipient/v_sender/v_expn */ |
0756eb3c PH |
104 | address_item **addr_local, /* add it to this if it's local */ |
105 | address_item **addr_remote, /* add it to this if it's remote */ | |
106 | address_item **addr_new, /* put new addresses on here */ | |
107 | address_item **addr_succeed) /* put old address here on success */ | |
108 | { | |
109 | /* | |
110 | ipliteral_router_options_block *ob = | |
111 | (ipliteral_router_options_block *)(rblock->options_block); | |
112 | */ | |
113 | host_item *h; | |
55414b25 JH |
114 | const uschar *domain = addr->domain; |
115 | const uschar *ip; | |
0756eb3c | 116 | int len = Ustrlen(domain); |
7e66e54d | 117 | int rc, ipv; |
0756eb3c PH |
118 | |
119 | addr_new = addr_new; /* Keep picky compilers happy */ | |
120 | addr_succeed = addr_succeed; | |
121 | ||
122 | DEBUG(D_route) debug_printf("%s router called for %s: domain = %s\n", | |
123 | rblock->name, addr->address, addr->domain); | |
124 | ||
f9daeae0 PH |
125 | /* Check that the domain is an IP address enclosed in square brackets. Remember |
126 | to allow for the "official" form of IPv6 addresses. If not, the router | |
127 | declines. Otherwise route to the single IP address, setting the host name to | |
128 | "(unnamed)". */ | |
0756eb3c PH |
129 | |
130 | if (domain[0] != '[' || domain[len-1] != ']') return DECLINE; | |
55414b25 | 131 | ip = string_copyn(domain+1, len-2); |
f9daeae0 PH |
132 | if (strncmpic(ip, US"IPV6:", 5) == 0 || strncmpic(ip, US"IPV4:", 5) == 0) |
133 | ip += 5; | |
134 | ||
7e66e54d PH |
135 | ipv = string_is_ip_address(ip, NULL); |
136 | if (ipv == 0 || (disable_ipv6 && ipv == 6)) | |
0756eb3c | 137 | return DECLINE; |
0756eb3c PH |
138 | |
139 | /* It seems unlikely that ignore_target_hosts will be used with this router, | |
140 | but if it is set, it should probably work. */ | |
141 | ||
55414b25 JH |
142 | if (verify_check_this_host(CUSS&rblock->ignore_target_hosts, |
143 | NULL, domain, ip, NULL) == OK) | |
0756eb3c PH |
144 | { |
145 | DEBUG(D_route) | |
f9daeae0 | 146 | debug_printf("%s is in ignore_target_hosts\n", ip); |
0756eb3c | 147 | addr->message = US"IP literal host explicitly ignored"; |
0756eb3c PH |
148 | return DECLINE; |
149 | } | |
150 | ||
151 | /* Set up a host item */ | |
152 | ||
f3ebb786 | 153 | h = store_get(sizeof(host_item), FALSE); |
0756eb3c PH |
154 | |
155 | h->next = NULL; | |
f9daeae0 | 156 | h->address = string_copy(ip); |
0756eb3c | 157 | h->port = PORT_NONE; |
55414b25 | 158 | h->name = domain; |
0756eb3c PH |
159 | h->mx = MX_NONE; |
160 | h->status = hstatus_unknown; | |
161 | h->why = hwhy_unknown; | |
162 | h->last_try = 0; | |
163 | ||
164 | /* Determine whether the host is the local host, and if so, take action | |
165 | according to the configuration. */ | |
166 | ||
167 | if (host_scan_for_local_hosts(h, &h, NULL) == HOST_FOUND_LOCAL) | |
168 | { | |
169 | int rc = rf_self_action(addr, h, rblock->self_code, rblock->self_rewrite, | |
170 | rblock->self, addr_new); | |
171 | if (rc != OK) return rc; | |
172 | } | |
173 | ||
174 | /* Address is routed to this host */ | |
175 | ||
176 | addr->host_list = h; | |
177 | ||
178 | /* Set up the errors address, if any. */ | |
179 | ||
d43cbe25 | 180 | rc = rf_get_errors_address(addr, rblock, verify, &addr->prop.errors_address); |
0756eb3c PH |
181 | if (rc != OK) return rc; |
182 | ||
aded2255 | 183 | /* Set up the additional and removable headers for this address. */ |
0756eb3c | 184 | |
d43cbe25 JH |
185 | rc = rf_get_munge_headers(addr, rblock, &addr->prop.extra_headers, |
186 | &addr->prop.remove_headers); | |
0756eb3c PH |
187 | if (rc != OK) return rc; |
188 | ||
189 | /* Fill in the transport, queue the address for local or remote delivery, and | |
190 | yield success. For local delivery, of course, the IP address won't be used. If | |
191 | just verifying, there need not be a transport, in which case it doesn't matter | |
192 | which queue we put the address on. This is all now handled by the route_queue() | |
193 | function. */ | |
194 | ||
195 | if (!rf_get_transport(rblock->transport_name, &(rblock->transport), | |
196 | addr, rblock->name, NULL)) | |
197 | return DEFER; | |
198 | ||
199 | addr->transport = rblock->transport; | |
200 | ||
201 | return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)? | |
202 | OK : DEFER; | |
203 | } | |
204 | ||
d185889f | 205 | #endif /*!MACRO_PREDEF*/ |
0756eb3c | 206 | /* End of routers/ipliteral.c */ |