X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/ca5c132adacf024c8140446b7cb402dd923bc4c3..74f1a42304ce056cf979d22fb970faae161e3ab2:/src/src/verify.c diff --git a/src/src/verify.c b/src/src/verify.c index 1555838ac..c7c769a16 100644 --- a/src/src/verify.c +++ b/src/src/verify.c @@ -39,7 +39,7 @@ static tree_node *dnsbl_cache = NULL; #define MT_NOT 1 #define MT_ALL 2 -static uschar cutthrough_response(int, char, uschar **, int); +static uschar cutthrough_response(client_conn_ctx *, char, uschar **, int); @@ -196,6 +196,7 @@ else case ccache_accept: HDEBUG(D_verify) debug_printf("callout cache: domain accepts random addresses\n"); + *failure_ptr = US"random"; dbfn_close(dbm_file); return TRUE; /* Default yield is OK */ @@ -409,10 +410,11 @@ if (addr->transport == cutthrough.addr.transport) /* Match! Send the RCPT TO, set done from the response */ done = - smtp_write_command(&ctblock, SCMD_FLUSH, "RCPT TO:<%.1000s>\r\n", - transport_rcpt_address(addr, - addr->transport->rcpt_include_affixes)) >= 0 && - cutthrough_response(cutthrough.fd, '2', &resp, CUTTHROUGH_DATA_TIMEOUT) == '2'; + smtp_write_command(&ctblock, SCMD_FLUSH, "RCPT TO:<%.1000s>\r\n", + transport_rcpt_address(addr, + addr->transport->rcpt_include_affixes)) >= 0 + && cutthrough_response(&cutthrough.cctx, '2', &resp, + CUTTHROUGH_DATA_TIMEOUT) == '2'; /* This would go horribly wrong if a callout fail was ignored by ACL. We punt by abandoning cutthrough on a reject, like the @@ -611,7 +613,7 @@ that conn for verification purposes (and later delivery also). Simplest coding means skipping this whole loop and doing the append separately. */ /* Can we re-use an open cutthrough connection? */ - if ( cutthrough.fd >= 0 + if ( cutthrough.cctx.sock >= 0 && (options & (vopt_callout_recipsender | vopt_callout_recippmaster)) == vopt_callout_recipsender && !random_local_part @@ -787,7 +789,7 @@ tls_retry_connection: The sync_responses() would need to be taught about it and we'd need another return code filtering out to here. - Avoid using a SIZE option on the MAIL for all randon-rcpt checks. + Avoid using a SIZE option on the MAIL for all random-rcpt checks. */ sx.avoid_option = OPTION_SIZE; @@ -802,6 +804,7 @@ tls_retry_connection: new_domain_record.random_result = ccache_accept; yield = OK; /* Only usable verify result we can return */ done = TRUE; + *failure_ptr = US"random"; goto no_conn; case FAIL: /* rejected: the preferred result */ new_domain_record.random_result = ccache_reject; @@ -821,11 +824,11 @@ tls_retry_connection: debug_printf_indent("problem after random/rset/mfrom; reopen conn\n"); random_local_part = NULL; #ifdef SUPPORT_TLS - tls_close(FALSE, TLS_SHUTDOWN_NOWAIT); + tls_close(sx.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); #endif HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); - (void)close(sx.inblock.sock); - sx.inblock.sock = sx.outblock.sock = -1; + (void)close(sx.cctx.sock); + sx.cctx.sock = -1; #ifndef DISABLE_EVENT (void) event_raise(addr->transport->event_action, US"tcp:close", NULL); @@ -1033,11 +1036,20 @@ no_conn: cutthrough.delivery= FALSE; HDEBUG(D_acl|D_v) debug_printf("Cutthrough cancelled by presence of transport filter\n"); } - if (ob->dkim.dkim_domain || ob->arc_sign) +#ifndef DISABLE_DKIM + if (ob->dkim.dkim_domain) { cutthrough.delivery= FALSE; - HDEBUG(D_acl|D_v) debug_printf("Cutthrough cancelled by presence of DKIM or ARC signing\n"); + HDEBUG(D_acl|D_v) debug_printf("Cutthrough cancelled by presence of DKIM signing\n"); } +#endif +#ifdef EXPERIMENTAL_ARC + if (ob->arc_sign) + { + cutthrough.delivery= FALSE; + HDEBUG(D_acl|D_v) debug_printf("Cutthrough cancelled by presence of ARC signing\n"); + } +#endif } if ( (cutthrough.delivery || options & vopt_callout_hold) @@ -1048,7 +1060,7 @@ no_conn: == vopt_callout_recipsender && !random_local_part && !pm_mailfrom - && cutthrough.fd < 0 + && cutthrough.cctx.sock < 0 && !sx.lmtp ) { @@ -1057,8 +1069,9 @@ no_conn: ? "cutthrough delivery" : "potential further verifies and delivery"); cutthrough.callout_hold_only = !cutthrough.delivery; - cutthrough.is_tls = tls_out.active >= 0; - cutthrough.fd = sx.outblock.sock; /* We assume no buffer in use in the outblock */ + cutthrough.is_tls = tls_out.active.sock >= 0; + /* We assume no buffer in use in the outblock */ + cutthrough.cctx = sx.cctx; cutthrough.nrcpt = 1; cutthrough.transport = addr->transport->name; cutthrough.interface = interface; @@ -1083,7 +1096,7 @@ no_conn: ctblock.buffersize = sizeof(ctbuffer); ctblock.ptr = ctbuffer; /* ctblock.cmd_count = 0; ctblock.authenticating = FALSE; */ - ctblock.sock = cutthrough.fd; + ctblock.cctx = &cutthrough.cctx; } else { @@ -1099,14 +1112,18 @@ no_conn: '2', 1); } - if (sx.inblock.sock >= 0) + if (sx.cctx.sock >= 0) { #ifdef SUPPORT_TLS - tls_close(FALSE, TLS_SHUTDOWN_NOWAIT); + if (sx.cctx.tls_ctx) + { + tls_close(sx.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); + sx.cctx.tls_ctx = NULL; + } #endif HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); - (void)close(sx.inblock.sock); - sx.inblock.sock = sx.outblock.sock = -1; + (void)close(sx.cctx.sock); + sx.cctx.sock = -1; #ifndef DISABLE_EVENT (void) event_raise(addr->transport->event_action, US"tcp:close", NULL); #endif @@ -1199,14 +1216,16 @@ return rc; static BOOL cutthrough_send(int n) { -if(cutthrough.fd < 0) +if(cutthrough.cctx.sock < 0) return TRUE; if( #ifdef SUPPORT_TLS - tls_out.active == cutthrough.fd ? tls_write(FALSE, ctblock.buffer, n, FALSE) : + cutthrough.is_tls + ? tls_write(cutthrough.cctx.tls_ctx, ctblock.buffer, n, FALSE) + : #endif - send(cutthrough.fd, ctblock.buffer, n, 0) > 0 + send(cutthrough.cctx.sock, ctblock.buffer, n, 0) > 0 ) { transport_count += n; @@ -1238,8 +1257,8 @@ return TRUE; static BOOL cutthrough_puts(uschar * cp, int n) { -if (cutthrough.fd < 0) return TRUE; -if (_cutthrough_puts(cp, n)) return TRUE; +if (cutthrough.cctx.sock < 0) return TRUE; +if (_cutthrough_puts(cp, n)) return TRUE; cancel_cutthrough_connection(TRUE, US"transmit failed"); return FALSE; } @@ -1290,7 +1309,7 @@ cutthrough_data_puts(US"\r\n", 2); /* Get and check response from cutthrough target */ static uschar -cutthrough_response(int fd, char expect, uschar ** copy, int timeout) +cutthrough_response(client_conn_ctx * cctx, char expect, uschar ** copy, int timeout) { smtp_inblock inblock; uschar inbuffer[4096]; @@ -1300,8 +1319,7 @@ inblock.buffer = inbuffer; inblock.buffersize = sizeof(inbuffer); inblock.ptr = inbuffer; inblock.ptrend = inbuffer; -inblock.sock = fd; -/* this relies on (inblock.sock == tls_out.active) */ +inblock.cctx = cctx; if(!smtp_read_response(&inblock, responsebuffer, sizeof(responsebuffer), expect, timeout)) cancel_cutthrough_connection(TRUE, US"target timeout on read"); @@ -1323,7 +1341,7 @@ return responsebuffer[0]; BOOL cutthrough_predata(void) { -if(cutthrough.fd < 0 || cutthrough.callout_hold_only) +if(cutthrough.cctx.sock < 0 || cutthrough.callout_hold_only) return FALSE; HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP>> DATA\n"); @@ -1331,7 +1349,7 @@ cutthrough_puts(US"DATA\r\n", 6); cutthrough_flush_send(); /* Assume nothing buffered. If it was it gets ignored. */ -return cutthrough_response(cutthrough.fd, '3', NULL, CUTTHROUGH_DATA_TIMEOUT) == '3'; +return cutthrough_response(&cutthrough.cctx, '3', NULL, CUTTHROUGH_DATA_TIMEOUT) == '3'; } @@ -1358,7 +1376,7 @@ cutthrough_headers_send(void) { transport_ctx tctx; -if(cutthrough.fd < 0 || cutthrough.callout_hold_only) +if(cutthrough.cctx.sock < 0 || cutthrough.callout_hold_only) return FALSE; /* We share a routine with the mainline transport to handle header add/remove/rewrites, @@ -1366,7 +1384,7 @@ if(cutthrough.fd < 0 || cutthrough.callout_hold_only) */ HDEBUG(D_acl) debug_printf_indent("----------- start cutthrough headers send -----------\n"); -tctx.u.fd = cutthrough.fd; +tctx.u.fd = cutthrough.cctx.sock; tctx.tblock = cutthrough.addr.transport; tctx.addr = &cutthrough.addr; tctx.check_string = US"."; @@ -1385,25 +1403,31 @@ return TRUE; static void close_cutthrough_connection(const uschar * why) { -int fd = cutthrough.fd; +int fd = cutthrough.cctx.sock; if(fd >= 0) { /* We could be sending this after a bunch of data, but that is ok as the only way to cancel the transfer in dataphase is to drop the tcp conn before the final dot. */ + client_conn_ctx tmp_ctx = cutthrough.cctx; ctblock.ptr = ctbuffer; HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP>> QUIT\n"); _cutthrough_puts(US"QUIT\r\n", 6); /* avoid recursion */ _cutthrough_flush_send(); - cutthrough.fd = -1; /* avoid recursion via read timeout */ + cutthrough.cctx.sock = -1; /* avoid recursion via read timeout */ cutthrough.nrcpt = 0; /* permit re-cutthrough on subsequent message */ /* Wait a short time for response, and discard it */ - cutthrough_response(fd, '2', NULL, 1); + cutthrough_response(&tmp_ctx, '2', NULL, 1); #ifdef SUPPORT_TLS - tls_close(FALSE, TLS_SHUTDOWN_NOWAIT); + if (cutthrough.is_tls) + { + tls_close(cutthrough.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT); + cutthrough.cctx.tls_ctx = NULL; + cutthrough.is_tls = FALSE; + } #endif HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n"); (void)close(fd); @@ -1424,9 +1448,10 @@ cutthrough.delivery = cutthrough.callout_hold_only = FALSE; void release_cutthrough_connection(const uschar * why) { -if (cutthrough.fd < 0) return; +if (cutthrough.cctx.sock < 0) return; HDEBUG(D_acl) debug_printf_indent("release cutthrough conn: %s\n", why); -cutthrough.fd = -1; +cutthrough.cctx.sock = -1; +cutthrough.cctx.tls_ctx = NULL; cutthrough.delivery = cutthrough.callout_hold_only = FALSE; } @@ -1452,7 +1477,8 @@ if( !cutthrough_puts(US".", 1) ) return cutthrough.addr.message; -res = cutthrough_response(cutthrough.fd, '2', &cutthrough.addr.message, CUTTHROUGH_DATA_TIMEOUT); +res = cutthrough_response(&cutthrough.cctx, '2', &cutthrough.addr.message, + CUTTHROUGH_DATA_TIMEOUT); for (addr = &cutthrough.addr; addr; addr = addr->next) { addr->message = cutthrough.addr.message; @@ -1648,9 +1674,9 @@ else ko_prefix = cr = US""; if (parse_find_at(address) == NULL) { - if ((options & vopt_qualify) == 0) + if (!(options & vopt_qualify)) { - if (f != NULL) + if (f) respond_printf(f, "%sA domain is required for \"%s\"%s\n", ko_prefix, address, cr); *failure_ptr = US"qualify"; @@ -1668,7 +1694,7 @@ DEBUG(D_verify) /* Rewrite and report on it. Clear the domain and local part caches - these may have been set by domains and local part tests during an ACL. */ -if (global_rewrite_rules != NULL) +if (global_rewrite_rules) { uschar *old = address; address = rewrite_address(address, options & vopt_is_recipient, FALSE, @@ -1677,21 +1703,21 @@ if (global_rewrite_rules != NULL) { for (i = 0; i < (MAX_NAMED_LIST * 2)/32; i++) vaddr->localpart_cache[i] = 0; for (i = 0; i < (MAX_NAMED_LIST * 2)/32; i++) vaddr->domain_cache[i] = 0; - if (f != NULL && !expn) fprintf(f, "Address rewritten as: %s\n", address); + if (f && !expn) fprintf(f, "Address rewritten as: %s\n", address); } } /* If this is the real sender address, we must update sender_address at this point, because it may be referred to in the routers. */ -if ((options & (vopt_fake_sender|vopt_is_recipient)) == 0) +if (!(options & (vopt_fake_sender|vopt_is_recipient))) sender_address = address; /* If the address was rewritten to <> no verification can be done, and we have to return OK. This rewriting is permitted only for sender addresses; for other addresses, such rewriting fails. */ -if (address[0] == 0) return OK; +if (!address[0]) return OK; /* Flip the legacy TLS-related variables over to the outbound set in case they're used in the context of a transport used by verification. Reset them @@ -1743,7 +1769,7 @@ while (addr_new) if (testflag(addr, af_pfr)) { allok = FALSE; - if (f != NULL) + if (f) { BOOL allow; @@ -1754,8 +1780,8 @@ while (addr_new) } else { - allow = (addr->address[0] == '|')? - testflag(addr, af_allow_pipe) : testflag(addr, af_allow_file); + allow = addr->address[0] == '|' + ? testflag(addr, af_allow_pipe) : testflag(addr, af_allow_file); fprintf(f, "%s -> %s", addr->parent->address, addr->address); } @@ -2670,7 +2696,8 @@ Side effect: any received ident value is put in sender_ident (NULL otherwise) void verify_get_ident(int port) { -int sock, host_af, qlen; +client_conn_ctx ident_conn_ctx = {0}; +int host_af, qlen; int received_sender_port, received_interface_port, n; uschar *p; blob early_data; @@ -2690,9 +2717,9 @@ to the incoming interface address. If the sender host address is an IPv6 address, the incoming interface address will also be IPv6. */ host_af = Ustrchr(sender_host_address, ':') == NULL ? AF_INET : AF_INET6; -if ((sock = ip_socket(SOCK_STREAM, host_af)) < 0) return; +if ((ident_conn_ctx.sock = ip_socket(SOCK_STREAM, host_af)) < 0) return; -if (ip_bind(sock, host_af, interface_address, 0) < 0) +if (ip_bind(ident_conn_ctx.sock, host_af, interface_address, 0) < 0) { DEBUG(D_ident) debug_printf("bind socket for ident failed: %s\n", strerror(errno)); @@ -2706,7 +2733,7 @@ qlen = snprintf(CS buffer, sizeof(buffer), "%d , %d\r\n", early_data.data = buffer; early_data.len = qlen; -if (ip_connect(sock, host_af, sender_host_address, port, +if (ip_connect(ident_conn_ctx.sock, host_af, sender_host_address, port, rfc1413_query_timeout, &early_data) < 0) { if (errno == ETIMEDOUT && LOGGING(ident_timeout)) @@ -2730,7 +2757,7 @@ for (;;) int size = sizeof(buffer) - (p - buffer); if (size <= 0) goto END_OFF; /* Buffer filled without seeing \n. */ - count = ip_recv(sock, p, size, rfc1413_query_timeout); + count = ip_recv(&ident_conn_ctx, p, size, rfc1413_query_timeout); if (count <= 0) goto END_OFF; /* Read error or EOF */ /* Scan what we just read, to see if we have reached the terminating \r\n. Be @@ -2795,7 +2822,7 @@ sender_ident = US string_printing(string_copyn(p, 127)); DEBUG(D_ident) debug_printf("sender_ident = %s\n", sender_ident); END_OFF: -(void)close(sock); +(void)close(ident_conn_ctx.sock); return; } @@ -3400,9 +3427,8 @@ else /* If the lookup succeeded, cache the RHS address. The code allows for more than one address - this was for complete generality and the possible - use of A6 records. However, A6 records have been reduced to experimental - status (August 2001) and may die out. So they may never get used at all, - let alone in dnsbl records. However, leave the code here, just in case. + use of A6 records. However, A6 records are no longer supported. Leave the code + here, just in case. Quite apart from one A6 RR generating multiple addresses, there are DNS lists that return more than one A record, so we must handle multiple