From 96b619cc129afed52411b9fad3407037a1cb7207 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 02:47:26 +0200 Subject: Adding upstream version 4.92. Signed-off-by: Daniel Baumann --- src/routers/ipliteral.c | 205 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 205 insertions(+) create mode 100644 src/routers/ipliteral.c (limited to 'src/routers/ipliteral.c') diff --git a/src/routers/ipliteral.c b/src/routers/ipliteral.c new file mode 100644 index 0000000..ecc6042 --- /dev/null +++ b/src/routers/ipliteral.c @@ -0,0 +1,205 @@ +/************************************************* +* Exim - an Internet mail transport agent * +*************************************************/ + +/* Copyright (c) University of Cambridge 1995 - 2018 */ +/* See the file NOTICE for conditions of use and distribution. */ + + +#include "../exim.h" +#include "rf_functions.h" +#include "ipliteral.h" + + +/* Options specific to the ipliteral router. Because some compilers do not like +empty declarations ("undefined" in the Standard) we put in a dummy value. */ + +optionlist ipliteral_router_options[] = { + { "", opt_hidden, NULL } +}; + +/* Size of the options list. An extern variable has to be used so that its +address can appear in the tables drtables.c. */ + +int ipliteral_router_options_count = + sizeof(ipliteral_router_options)/sizeof(optionlist); + +/* Default private options block for the ipliteral router. Again, a dummy +value is present to keep some compilers happy. */ + +ipliteral_router_options_block ipliteral_router_option_defaults = { 0 }; + + +#ifdef MACRO_PREDEF + +/* Dummy entries */ +void ipliteral_router_init(router_instance *rblock) {} +int ipliteral_router_entry(router_instance *rblock, address_item *addr, + struct passwd *pw, int verify, address_item **addr_local, + address_item **addr_remote, address_item **addr_new, + address_item **addr_succeed) {return 0;} + +#else /*!MACRO_PREDEF*/ + + +/************************************************* +* Initialization entry point * +*************************************************/ + +/* Called for each instance, after its options have been read, to enable +consistency checks to be done, or anything else that needs to be set up. */ + +void +ipliteral_router_init(router_instance *rblock) +{ +/* +ipliteral_router_options_block *ob = + (ipliteral_router_options_block *)(rblock->options_block); +*/ +rblock = rblock; +} + + + +/************************************************* +* Main entry point * +*************************************************/ + +/* See local README for interface details. This router returns: + +DECLINE + . the domain is not in the form of an IP literal + +DEFER + . verifying the errors address caused a deferment or a big disaster such + as an expansion failure (rf_get_errors_address) + . expanding a headers_{add,remove} string caused a deferment or another + expansion error (rf_get_munge_headers) + . a problem in rf_get_transport: no transport when one is needed; + failed to expand dynamic transport; failed to find dynamic transport + . failure to expand or find a uid/gid (rf_get_ugid via rf_queue_add) + . self = "freeze", self = "defer" + +PASS + . self = "pass" + +REROUTED + . self = "reroute" + +FAIL + . self = "fail" + +OK + added address to addr_local or addr_remote, as appropriate for the + type of transport; this includes the self="send" case. +*/ + +int +ipliteral_router_entry( + router_instance *rblock, /* data for this instantiation */ + address_item *addr, /* address we are working on */ + struct passwd *pw, /* passwd entry after check_local_user */ + int verify, /* v_none/v_recipient/v_sender/v_expn */ + address_item **addr_local, /* add it to this if it's local */ + address_item **addr_remote, /* add it to this if it's remote */ + address_item **addr_new, /* put new addresses on here */ + address_item **addr_succeed) /* put old address here on success */ +{ +/* +ipliteral_router_options_block *ob = + (ipliteral_router_options_block *)(rblock->options_block); +*/ +host_item *h; +const uschar *domain = addr->domain; +const uschar *ip; +int len = Ustrlen(domain); +int rc, ipv; + +addr_new = addr_new; /* Keep picky compilers happy */ +addr_succeed = addr_succeed; + +DEBUG(D_route) debug_printf("%s router called for %s: domain = %s\n", + rblock->name, addr->address, addr->domain); + +/* Check that the domain is an IP address enclosed in square brackets. Remember +to allow for the "official" form of IPv6 addresses. If not, the router +declines. Otherwise route to the single IP address, setting the host name to +"(unnamed)". */ + +if (domain[0] != '[' || domain[len-1] != ']') return DECLINE; +ip = string_copyn(domain+1, len-2); +if (strncmpic(ip, US"IPV6:", 5) == 0 || strncmpic(ip, US"IPV4:", 5) == 0) + ip += 5; + +ipv = string_is_ip_address(ip, NULL); +if (ipv == 0 || (disable_ipv6 && ipv == 6)) + return DECLINE; + +/* It seems unlikely that ignore_target_hosts will be used with this router, +but if it is set, it should probably work. */ + +if (verify_check_this_host(CUSS&rblock->ignore_target_hosts, + NULL, domain, ip, NULL) == OK) + { + DEBUG(D_route) + debug_printf("%s is in ignore_target_hosts\n", ip); + addr->message = US"IP literal host explicitly ignored"; + return DECLINE; + } + +/* Set up a host item */ + +h = store_get(sizeof(host_item)); + +h->next = NULL; +h->address = string_copy(ip); +h->port = PORT_NONE; +h->name = domain; +h->mx = MX_NONE; +h->status = hstatus_unknown; +h->why = hwhy_unknown; +h->last_try = 0; + +/* Determine whether the host is the local host, and if so, take action +according to the configuration. */ + +if (host_scan_for_local_hosts(h, &h, NULL) == HOST_FOUND_LOCAL) + { + int rc = rf_self_action(addr, h, rblock->self_code, rblock->self_rewrite, + rblock->self, addr_new); + if (rc != OK) return rc; + } + +/* Address is routed to this host */ + +addr->host_list = h; + +/* Set up the errors address, if any. */ + +rc = rf_get_errors_address(addr, rblock, verify, &addr->prop.errors_address); +if (rc != OK) return rc; + +/* Set up the additional and removable headers for this address. */ + +rc = rf_get_munge_headers(addr, rblock, &addr->prop.extra_headers, + &addr->prop.remove_headers); +if (rc != OK) return rc; + +/* Fill in the transport, queue the address for local or remote delivery, and +yield success. For local delivery, of course, the IP address won't be used. If +just verifying, there need not be a transport, in which case it doesn't matter +which queue we put the address on. This is all now handled by the route_queue() +function. */ + +if (!rf_get_transport(rblock->transport_name, &(rblock->transport), + addr, rblock->name, NULL)) + return DEFER; + +addr->transport = rblock->transport; + +return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)? + OK : DEFER; +} + +#endif /*!MACRO_PREDEF*/ +/* End of routers/ipliteral.c */ -- cgit v1.2.3