X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/2e5b33cdf3591080e44862951f7c2ac9eced16de..190404d75c168ce1e6dbf6ee08bdbbf62b365e4b:/src/src/acl.c diff --git a/src/src/acl.c b/src/src/acl.c index a721665d4..ac2d39c0c 100644 --- a/src/src/acl.c +++ b/src/src/acl.c @@ -2,7 +2,7 @@ * Exim - an Internet mail transport agent * *************************************************/ -/* Copyright (c) University of Cambridge 1995 - 2012 */ +/* Copyright (c) University of Cambridge 1995 - 2018 */ /* See the file NOTICE for conditions of use and distribution. */ /* Code for handling Access Control Lists (ACLs) */ @@ -21,9 +21,15 @@ enum { ACL_ACCEPT, ACL_DEFER, ACL_DENY, ACL_DISCARD, ACL_DROP, ACL_REQUIRE, /* ACL verbs */ -static uschar *verbs[] = - { US"accept", US"defer", US"deny", US"discard", US"drop", US"require", - US"warn" }; +static uschar *verbs[] = { + [ACL_ACCEPT] = US"accept", + [ACL_DEFER] = US"defer", + [ACL_DENY] = US"deny", + [ACL_DISCARD] = US"discard", + [ACL_DROP] = US"drop", + [ACL_REQUIRE] = US"require", + [ACL_WARN] = US"warn" +}; /* For each verb, the conditions for which "message" or "log_message" are used are held as a bitmap. This is to avoid expanding the strings unnecessarily. For @@ -31,17 +37,17 @@ are held as a bitmap. This is to avoid expanding the strings unnecessarily. For the code. */ static int msgcond[] = { - (1< first; ) + { + int middle = (first + last)/2; + uschar * s = ol[middle].name; + int c = Ustrncmp(name, s, Ustrlen(s)); + if (c == 0) return middle; + else if (c > 0) first = middle + 1; + else last = middle; + } +return -1; +} + + + +/************************************************* +* Pick out condition from list * +*************************************************/ + +/* Use a binary chop method + +Arguments: + name name to find + list list of conditions + end size of list + +Returns: offset in list, or -1 if not found +*/ + +static int +acl_checkcondition(uschar * name, condition_def * list, int end) +{ +for (int start = 0; start < end; ) + { + int mid = (start + end)/2; + int c = Ustrcmp(name, list[mid].name); + if (c == 0) return mid; + if (c < 0) end = mid; + else start = mid + 1; + } +return -1; +} /************************************************* @@ -717,9 +703,7 @@ Returns: offset in list, or -1 if not found static int acl_checkname(uschar *name, uschar **list, int end) { -int start = 0; - -while (start < end) +for (int start = 0; start < end; ) { int mid = (start + end)/2; int c = Ustrcmp(name, list[mid]); @@ -757,7 +741,7 @@ acl_block **lastp = &yield; acl_block *this = NULL; acl_condition_block *cond; acl_condition_block **condp = NULL; -uschar *s; +uschar * s; *error = NULL; @@ -787,8 +771,7 @@ while ((s = (*func)()) != NULL) /* If a verb is unrecognized, it may be another condition or modifier that continues the previous verb. */ - v = acl_checkname(name, verbs, sizeof(verbs)/sizeof(char *)); - if (v < 0) + if ((v = acl_checkname(name, verbs, nelem(verbs))) < 0) { if (this == NULL) { @@ -825,8 +808,7 @@ while ((s = (*func)()) != NULL) /* Handle a condition or modifier. */ - c = acl_checkname(name, conditions, sizeof(conditions)/sizeof(char *)); - if (c < 0) + if ((c = acl_checkcondition(name, conditions, nelem(conditions))) < 0) { *error = string_sprintf("unknown ACL condition/modifier in \"%s\"", saveline); @@ -835,10 +817,10 @@ while ((s = (*func)()) != NULL) /* The modifiers may not be negated */ - if (negated && cond_modifiers[c]) + if (negated && conditions[c].is_modifier) { *error = string_sprintf("ACL error: negation is not allowed with " - "\"%s\"", conditions[c]); + "\"%s\"", conditions[c].name); return NULL; } @@ -849,7 +831,7 @@ while ((s = (*func)()) != NULL) this->verb != ACL_DISCARD) { *error = string_sprintf("ACL error: \"%s\" is not allowed with \"%s\"", - conditions[c], verbs[this->verb]); + conditions[c].name, verbs[this->verb]); return NULL; } @@ -872,6 +854,26 @@ while ((s = (*func)()) != NULL) compatibility. */ if (c == ACLC_SET) +#ifndef DISABLE_DKIM + if ( Ustrncmp(s, "dkim_verify_status", 18) == 0 + || Ustrncmp(s, "dkim_verify_reason", 18) == 0) + { + uschar * endptr = s+18; + + if (isalnum(*endptr)) + { + *error = string_sprintf("invalid variable name after \"set\" in ACL " + "modifier \"set %s\" " + "(only \"dkim_verify_status\" or \"dkim_verify_reason\" permitted)", + s); + return NULL; + } + cond->u.varname = string_copyn(s, 18); + s = endptr; + while (isspace(*s)) s++; + } + else +#endif { uschar *endptr; @@ -916,7 +918,7 @@ while ((s = (*func)()) != NULL) if (*s++ != '=') { *error = string_sprintf("\"=\" missing after ACL \"%s\" %s", name, - cond_modifiers[c]? US"modifier" : US"condition"); + conditions[c].is_modifier ? US"modifier" : US"condition"); return NULL; } while (isspace(*s)) s++; @@ -943,21 +945,34 @@ Returns: nothing */ static void -setup_header(uschar *hstring) +setup_header(const uschar *hstring) { -uschar *p, *q; +const uschar *p, *q; int hlen = Ustrlen(hstring); -/* An empty string does nothing; otherwise add a final newline if necessary. */ +/* Ignore any leading newlines */ +while (*hstring == '\n') hstring++, hlen--; +/* An empty string does nothing; ensure exactly one final newline. */ if (hlen <= 0) return; -if (hstring[hlen-1] != '\n') hstring = string_sprintf("%s\n", hstring); +if (hstring[--hlen] != '\n') /* no newline */ + q = string_sprintf("%s\n", hstring); +else if (hstring[hlen-1] == '\n') /* double newline */ + { + uschar * s = string_copy(hstring); + while(s[--hlen] == '\n') + s[hlen+1] = '\0'; + q = s; + } +else + q = hstring; /* Loop for multiple header lines, taking care about continuations */ -for (p = q = hstring; *p != 0; ) +for (p = q; *p; p = q) { - uschar *s; + const uschar *s; + uschar * hdr; int newtype = htype_add_bot; header_line **hptr = &acl_added_headers; @@ -965,8 +980,8 @@ for (p = q = hstring; *p != 0; ) for (;;) { - q = Ustrchr(q, '\n'); - if (*(++q) != ' ' && *q != '\t') break; + q = Ustrchr(q, '\n'); /* we know there was a newline */ + if (*++q != ' ' && *q != '\t') break; } /* If the line starts with a colon, interpret the instruction for where to @@ -1001,41 +1016,76 @@ for (p = q = hstring; *p != 0; ) to the front of it. */ for (s = p; s < q - 1; s++) - { if (*s == ':' || !isgraph(*s)) break; - } - s = string_sprintf("%s%.*s", (*s == ':')? "" : "X-ACL-Warn: ", (int) (q - p), p); - hlen = Ustrlen(s); + hdr = string_sprintf("%s%.*s", *s == ':' ? "" : "X-ACL-Warn: ", (int) (q - p), p); + hlen = Ustrlen(hdr); /* See if this line has already been added */ - while (*hptr != NULL) + while (*hptr) { - if (Ustrncmp((*hptr)->text, s, hlen) == 0) break; - hptr = &((*hptr)->next); + if (Ustrncmp((*hptr)->text, hdr, hlen) == 0) break; + hptr = &(*hptr)->next; } /* Add if not previously present */ - if (*hptr == NULL) + if (!*hptr) { header_line *h = store_get(sizeof(header_line)); - h->text = s; + h->text = hdr; h->next = NULL; h->type = newtype; h->slen = hlen; *hptr = h; - hptr = &(h->next); + hptr = &h->next; } + } +} + - /* Advance for next header line within the string */ - p = q; +/************************************************* +* List the added header lines * +*************************************************/ +uschar * +fn_hdrs_added(void) +{ +gstring * g = NULL; + +for (header_line * h = acl_added_headers; h; h = h->next) + { + int i = h->slen; + if (h->text[i-1] == '\n') i--; + g = string_append_listele_n(g, '\n', h->text, i); } + +return g ? g->s : NULL; } +/************************************************* +* Set up removed header line(s) * +*************************************************/ + +/* This function is called by the remove_header modifier. The argument is +treated as a sequence of header names which are added to a colon separated +list, provided there isn't an identical one already there. + +Argument: string of header names +Returns: nothing +*/ + +static void +setup_remove_header(const uschar *hnames) +{ +if (*hnames) + acl_removed_headers = acl_removed_headers + ? string_sprintf("%s : %s", acl_removed_headers, hnames) + : string_copy(hnames); +} + /************************************************* @@ -1079,15 +1129,15 @@ if (log_message != NULL && log_message != user_message) /* Search previously logged warnings. They are kept in malloc store so they can be freed at the start of a new message. */ - for (logged = acl_warn_logged; logged != NULL; logged = logged->next) + for (logged = acl_warn_logged; logged; logged = logged->next) if (Ustrcmp(logged->text, text) == 0) break; - if (logged == NULL) + if (!logged) { int length = Ustrlen(text) + 1; log_write(0, LOG_MAIN, "%s", text); logged = store_malloc(sizeof(string_item) + length); - logged->text = (uschar *)logged + sizeof(string_item); + logged->text = US logged + sizeof(string_item); memcpy(logged->text, text, length); logged->next = acl_warn_logged; acl_warn_logged = logged; @@ -1096,7 +1146,7 @@ if (log_message != NULL && log_message != user_message) /* If there's no user message, we are done. */ -if (user_message == NULL) return; +if (!user_message) return; /* If this isn't a message ACL, we can't do anything with a user message. Log an error. */ @@ -1157,15 +1207,14 @@ if (host_lookup_failed) /* Need to do a lookup */ HDEBUG(D_acl) - debug_printf("looking up host name to force name/address consistency check\n"); + debug_printf_indent("looking up host name to force name/address consistency check\n"); if ((rc = host_name_lookup()) != OK) { - *log_msgptr = (rc == DEFER)? - US"host lookup deferred for reverse lookup check" - : - string_sprintf("host lookup failed for reverse lookup check%s", - host_lookup_msg); + *log_msgptr = rc == DEFER + ? US"host lookup deferred for reverse lookup check" + : string_sprintf("host lookup failed for reverse lookup check%s", + host_lookup_msg); return rc; /* DEFER or FAIL */ } @@ -1191,7 +1240,7 @@ an odd configuration - why didn't the SRV record have a weight of 1 instead?) Arguments: dnsa the DNS answer block dnss a DNS scan block for us to use - reset option specifing what portion to scan, as described above + reset option specifying what portion to scan, as described above target the target hostname to use for matching RR names Returns: CSA_OK successfully authorized @@ -1203,13 +1252,10 @@ static int acl_verify_csa_address(dns_answer *dnsa, dns_scan *dnss, int reset, uschar *target) { -dns_record *rr; -dns_address *da; +int rc = CSA_FAIL_NOADDR; -BOOL target_found = FALSE; - -for (rr = dns_next_rr(dnsa, dnss, reset); - rr != NULL; +for (dns_record * rr = dns_next_rr(dnsa, dnss, reset); + rr; rr = dns_next_rr(dnsa, dnss, RESET_NEXT)) { /* Check this is an address RR for the target hostname. */ @@ -1217,24 +1263,21 @@ for (rr = dns_next_rr(dnsa, dnss, reset); if (rr->type != T_A #if HAVE_IPV6 && rr->type != T_AAAA - #ifdef SUPPORT_A6 - && rr->type != T_A6 - #endif #endif ) continue; if (strcmpic(target, rr->name) != 0) continue; - target_found = TRUE; + rc = CSA_FAIL_MISMATCH; /* Turn the target address RR into a list of textual IP addresses and scan the list. There may be more than one if it is an A6 RR. */ - for (da = dns_address_from_rr(dnsa, rr); da != NULL; da = da->next) + for (dns_address * da = dns_address_from_rr(dnsa, rr); da; da = da->next) { /* If the client IP address matches the target IP address, it's good! */ - DEBUG(D_acl) debug_printf("CSA target address is %s\n", da->address); + DEBUG(D_acl) debug_printf_indent("CSA target address is %s\n", da->address); if (strcmpic(sender_host_address, da->address) == 0) return CSA_OK; } @@ -1244,8 +1287,7 @@ for (rr = dns_next_rr(dnsa, dnss, reset); using an unauthorized IP address, otherwise the target has no authorized IP addresses. */ -if (target_found) return CSA_FAIL_MISMATCH; -else return CSA_FAIL_NOADDR; +return rc; } @@ -1272,10 +1314,10 @@ Returns: CSA_UNKNOWN no valid CSA record found */ static int -acl_verify_csa(uschar *domain) +acl_verify_csa(const uschar *domain) { tree_node *t; -uschar *found, *p; +const uschar *found; int priority, weight, port; dns_answer dnsa; dns_scan dnss; @@ -1298,7 +1340,7 @@ containing a keyword and a colon before the actual IP address. */ if (domain[0] == '[') { - uschar *start = Ustrchr(domain, ':'); + const uschar *start = Ustrchr(domain, ':'); if (start == NULL) start = domain; domain = string_copyn(start + 1, Ustrlen(start) - 2); } @@ -1353,20 +1395,19 @@ switch (dns_special_lookup(&dnsa, domain, T_CSA, &found)) /* Scan the reply for well-formed CSA SRV records. */ for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS); - rr != NULL; - rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT)) + rr; + rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT)) if (rr->type == T_SRV) { - if (rr->type != T_SRV) continue; + const uschar * p = rr->data; /* Extract the numerical SRV fields (p is incremented) */ - p = rr->data; GETSHORT(priority, p); GETSHORT(weight, p); GETSHORT(port, p); DEBUG(D_acl) - debug_printf("CSA priority=%d weight=%d port=%d\n", priority, weight, port); + debug_printf_indent("CSA priority=%d weight=%d port=%d\n", priority, weight, port); /* Check the CSA version number */ @@ -1378,13 +1419,8 @@ for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS); assertion: legitimate SMTP clients are all explicitly authorized with CSA SRV records of their own. */ - if (found != domain) - { - if (port & 1) - return t->data.val = CSA_FAIL_EXPLICIT; - else - return t->data.val = CSA_UNKNOWN; - } + if (Ustrcmp(found, domain) != 0) + return t->data.val = port & 1 ? CSA_FAIL_EXPLICIT : CSA_UNKNOWN; /* This CSA SRV record refers directly to our domain, so we check the value in the weight field to work out the domain's authorization. 0 and 1 are @@ -1403,14 +1439,14 @@ for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS); (void)dn_expand(dnsa.answer, dnsa.answer + dnsa.answerlen, p, (DN_EXPAND_ARG4_TYPE)target, sizeof(target)); - DEBUG(D_acl) debug_printf("CSA target is %s\n", target); + DEBUG(D_acl) debug_printf_indent("CSA target is %s\n", target); break; } /* If we didn't break the loop then no appropriate records were found. */ -if (rr == NULL) return t->data.val = CSA_UNKNOWN; +if (!rr) return t->data.val = CSA_UNKNOWN; /* Do not check addresses if the target is ".", in accordance with RFC 2782. A target of "." indicates there are no valid addresses, so the client cannot @@ -1438,23 +1474,20 @@ else type = T_A; -#if HAVE_IPV6 && defined(SUPPORT_A6) -DNS_LOOKUP_AGAIN: -#endif - +lookup_dnssec_authenticated = NULL; switch (dns_lookup(&dnsa, target, type, NULL)) { /* If something bad happened (most commonly DNS_AGAIN), defer. */ default: - return t->data.val = CSA_DEFER_ADDR; + return t->data.val = CSA_DEFER_ADDR; /* If the query succeeded, scan the addresses and return the result. */ case DNS_SUCCEED: - rc = acl_verify_csa_address(&dnsa, &dnss, RESET_ANSWERS, target); - if (rc != CSA_FAIL_NOADDR) return t->data.val = rc; - /* else fall through */ + rc = acl_verify_csa_address(&dnsa, &dnss, RESET_ANSWERS, target); + if (rc != CSA_FAIL_NOADDR) return t->data.val = rc; + /* else fall through */ /* If the target has no IP addresses, the client cannot have an authorized IP address. However, if the target site uses A6 records (not AAAA records) @@ -1462,12 +1495,7 @@ switch (dns_lookup(&dnsa, target, type, NULL)) case DNS_NOMATCH: case DNS_NODATA: - - #if HAVE_IPV6 && defined(SUPPORT_A6) - if (type == T_AAAA) { type = T_A6; goto DNS_LOOKUP_AGAIN; } - #endif - - return t->data.val = CSA_FAIL_NOADDR; + return t->data.val = CSA_FAIL_NOADDR; } } @@ -1478,7 +1506,8 @@ switch (dns_lookup(&dnsa, target, type, NULL)) *************************************************/ enum { VERIFY_REV_HOST_LKUP, VERIFY_CERT, VERIFY_HELO, VERIFY_CSA, VERIFY_HDR_SYNTAX, - VERIFY_NOT_BLIND, VERIFY_HDR_SNDR, VERIFY_SNDR, VERIFY_RCPT + VERIFY_NOT_BLIND, VERIFY_HDR_SNDR, VERIFY_SNDR, VERIFY_RCPT, + VERIFY_HDR_NAMES_ASCII, VERIFY_ARC }; typedef struct { uschar * name; @@ -1488,24 +1517,29 @@ typedef struct { unsigned alt_opt_sep; /* >0 Non-/ option separator (custom parser) */ } verify_type_t; static verify_type_t verify_type_list[] = { - { US"reverse_host_lookup", VERIFY_REV_HOST_LKUP, ~0, TRUE, 0 }, - { US"certificate", VERIFY_CERT, ~0, TRUE, 0 }, - { US"helo", VERIFY_HELO, ~0, TRUE, 0 }, + /* name value where no-opt opt-sep */ + { US"reverse_host_lookup", VERIFY_REV_HOST_LKUP, ~0, FALSE, 0 }, + { US"certificate", VERIFY_CERT, ~0, TRUE, 0 }, + { US"helo", VERIFY_HELO, ~0, TRUE, 0 }, { US"csa", VERIFY_CSA, ~0, FALSE, 0 }, - { US"header_syntax", VERIFY_HDR_SYNTAX, (1<alt_opt_sep ? strncmpic(ss, vp->name, vp->alt_opt_sep) == 0 : strcmpic (ss, vp->name) == 0) break; -if ((char *)vp >= (char *)verify_type_list + sizeof(verify_type_list)) +if (CS vp >= CS verify_type_list + sizeof(verify_type_list)) goto BAD_VERIFY; -if (vp->no_options && slash != NULL) +if (vp->no_options && slash) { *log_msgptr = string_sprintf("unexpected '/' found in \"%s\" " "(this verify item has no options)", arg); return ERROR; } -if (!(vp->where_allowed & (1<where_allowed & BIT(where))) { - *log_msgptr = string_sprintf("cannot verify %s in ACL for %s", vp->name, acl_wherenames[where]); + *log_msgptr = string_sprintf("cannot verify %s in ACL for %s", + vp->name, acl_wherenames[where]); return ERROR; } switch(vp->value) { case VERIFY_REV_HOST_LKUP: - if (sender_host_address == NULL) return OK; - return acl_verify_reverse(user_msgptr, log_msgptr); + if (!sender_host_address) return OK; + if ((rc = acl_verify_reverse(user_msgptr, log_msgptr)) == DEFER) + while ((ss = string_nextinlist(&list, &sep, NULL, 0))) + if (strcmpic(ss, US"defer_ok") == 0) + return OK; + return rc; case VERIFY_CERT: /* TLS certificate verification is done at STARTTLS time; here we just test whether it was successful or not. (This is for optional verification; for mandatory verification, the connection doesn't last this long.) */ - if (tls_in.certificate_verified) return OK; - *user_msgptr = US"no verified certificate"; - return FAIL; + if (tls_in.certificate_verified) return OK; + *user_msgptr = US"no verified certificate"; + return FAIL; case VERIFY_HELO: /* We can test the result of optional HELO verification that might have occurred earlier. If not, we can attempt the verification now. */ - if (!helo_verified && !helo_verify_failed) smtp_verify_helo(); - return helo_verified? OK : FAIL; + if (!f.helo_verified && !f.helo_verify_failed) smtp_verify_helo(); + return f.helo_verified ? OK : FAIL; case VERIFY_CSA: /* Do Client SMTP Authorization checks in a separate function, and turn the result code into user-friendly strings. */ - rc = acl_verify_csa(list); - *log_msgptr = *user_msgptr = string_sprintf("client SMTP authorization %s", + rc = acl_verify_csa(list); + *log_msgptr = *user_msgptr = string_sprintf("client SMTP authorization %s", csa_reason_string[rc]); - csa_status = csa_status_string[rc]; - DEBUG(D_acl) debug_printf("CSA result %s\n", csa_status); - return csa_return_code[rc]; + csa_status = csa_status_string[rc]; + DEBUG(D_acl) debug_printf_indent("CSA result %s\n", csa_status); + return csa_return_code[rc]; + +#ifdef EXPERIMENTAL_ARC + case VERIFY_ARC: + { /* Do Authenticated Received Chain checks in a separate function. */ + const uschar * condlist = CUS string_nextinlist(&list, &sep, NULL, 0); + int csep = 0; + uschar * cond; + + if (!(arc_state = acl_verify_arc())) return DEFER; + DEBUG(D_acl) debug_printf_indent("ARC verify result %s %s%s%s\n", arc_state, + arc_state_reason ? "(":"", arc_state_reason, arc_state_reason ? ")":""); + + if (!condlist) condlist = US"none:pass"; + while ((cond = string_nextinlist(&condlist, &csep, NULL, 0))) + if (Ustrcmp(arc_state, cond) == 0) return OK; + return FAIL; + } +#endif case VERIFY_HDR_SYNTAX: - /* Check that all relevant header lines have the correct syntax. If there is + /* Check that all relevant header lines have the correct 5322-syntax. If there is a syntax error, we return details of the error to the sender if configured to send out full details. (But a "message" setting on the ACL can override, as always). */ rc = verify_check_headers(log_msgptr); - if (rc != OK && smtp_return_error_details && *log_msgptr != NULL) + if (rc != OK && *log_msgptr) + if (smtp_return_error_details) + *user_msgptr = string_sprintf("Rejected after DATA: %s", *log_msgptr); + else + acl_verify_message = *log_msgptr; + return rc; + + case VERIFY_HDR_NAMES_ASCII: + /* Check that all header names are true 7 bit strings + See RFC 5322, 2.2. and RFC 6532, 3. */ + + rc = verify_check_header_names_ascii(log_msgptr); + if (rc != OK && smtp_return_error_details && *log_msgptr) *user_msgptr = string_sprintf("Rejected after DATA: %s", *log_msgptr); return rc; @@ -1652,8 +1723,7 @@ switch(vp->value) /* Check that no recipient of this message is "blind", that is, every envelope recipient must be mentioned in either To: or Cc:. */ - rc = verify_check_notblind(); - if (rc != OK) + if ((rc = verify_check_notblind()) != OK) { *log_msgptr = string_sprintf("bcc recipient detected"); if (smtp_return_error_details) @@ -1695,8 +1765,7 @@ switch(vp->value) /* Remaining items are optional; they apply to sender and recipient verification, including "header sender" verification. */ -while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)) - != NULL) +while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))) { if (strcmpic(ss, US"defer_ok") == 0) defer_ok = TRUE; else if (strcmpic(ss, US"no_details") == 0) no_details = TRUE; @@ -1727,13 +1796,13 @@ while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)) while (isspace(*ss)) ss++; if (*ss++ == '=') { + const uschar * sublist = ss; int optsep = ','; - uschar *opt; uschar buffer[256]; - while (isspace(*ss)) ss++; + uschar * opt; - while ((opt = string_nextinlist(&ss, &optsep, buffer, sizeof(buffer))) - != NULL) + while (isspace(*sublist)) sublist++; + while ((opt = string_nextinlist(&sublist, &optsep, buffer, sizeof(buffer)))) { callout_opt_t * op; double period = 1.0F; @@ -1755,15 +1824,11 @@ while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)) } while (isspace(*opt)) opt++; } - if (op->timeval) + if (op->timeval && (period = readconf_readtime(opt, 0, FALSE)) < 0) { - period = readconf_readtime(opt, 0, FALSE); - if (period < 0) - { - *log_msgptr = string_sprintf("bad time value in ACL condition " - "\"verify %s\"", arg); - return ERROR; - } + *log_msgptr = string_sprintf("bad time value in ACL condition " + "\"verify %s\"", arg); + return ERROR; } switch(op->value) @@ -1821,17 +1886,17 @@ message if giving out verification details. */ if (verify_header_sender) { int verrno; - rc = verify_check_header_address(user_msgptr, log_msgptr, callout, + + if ((rc = verify_check_header_address(user_msgptr, log_msgptr, callout, callout_overall, callout_connect, se_mailfrom, pm_mailfrom, verify_options, - &verrno); - if (rc != OK) + &verrno)) != OK) { *basic_errno = verrno; if (smtp_return_error_details) { - if (*user_msgptr == NULL && *log_msgptr != NULL) + if (!*user_msgptr && *log_msgptr) *user_msgptr = string_sprintf("Rejected after DATA: %s", *log_msgptr); - if (rc == DEFER) acl_temp_details = TRUE; + if (rc == DEFER) f.acl_temp_details = TRUE; } } } @@ -1851,10 +1916,9 @@ Therefore, we always do a full sender verify when any kind of callout is specified. Caching elsewhere, for instance in the DNS resolver and in the callout handling, should ensure that this is not terribly inefficient. */ -else if (verify_sender_address != NULL) +else if (verify_sender_address) { - if ((verify_options & (vopt_callout_recipsender|vopt_callout_recippmaster)) - != 0) + if ((verify_options & (vopt_callout_recipsender|vopt_callout_recippmaster))) { *log_msgptr = US"use_sender or use_postmaster cannot be used for a " "sender verify callout"; @@ -1870,12 +1934,14 @@ else if (verify_sender_address != NULL) callout that was done previously). If the "routed" flag is not set, routing must have failed, so we use the saved return code. */ - if (testflag(sender_vaddr, af_verify_routed)) rc = OK; else + if (testflag(sender_vaddr, af_verify_routed)) + rc = OK; + else { rc = sender_vaddr->special_action; *basic_errno = sender_vaddr->basic_errno; } - HDEBUG(D_acl) debug_printf("using cached sender verify result\n"); + HDEBUG(D_acl) debug_printf_indent("using cached sender verify result\n"); } /* Do a new verification, and cache the result. The cache is used to avoid @@ -1894,6 +1960,13 @@ else if (verify_sender_address != NULL) uschar *save_address_data = deliver_address_data; sender_vaddr = deliver_make_addr(verify_sender_address, TRUE); +#ifdef SUPPORT_I18N + if ((sender_vaddr->prop.utf8_msg = message_smtputf8)) + { + sender_vaddr->prop.utf8_downcvt = message_utf8_downconvert == 1; + sender_vaddr->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1; + } +#endif if (no_details) setflag(sender_vaddr, af_sverify_told); if (verify_sender_address[0] != 0) { @@ -1915,24 +1988,23 @@ else if (verify_sender_address != NULL) rc = verify_address(sender_vaddr, NULL, verify_options, callout, callout_overall, callout_connect, se_mailfrom, pm_mailfrom, &routed); - HDEBUG(D_acl) debug_printf("----------- end verify ------------\n"); + HDEBUG(D_acl) debug_printf_indent("----------- end verify ------------\n"); - if (rc == OK) - { - if (Ustrcmp(sender_vaddr->address, verify_sender_address) != 0) - { - DEBUG(D_acl) debug_printf("sender %s verified ok as %s\n", - verify_sender_address, sender_vaddr->address); - } - else - { - DEBUG(D_acl) debug_printf("sender %s verified ok\n", - verify_sender_address); - } - } - else *basic_errno = sender_vaddr->basic_errno; + if (rc != OK) + *basic_errno = sender_vaddr->basic_errno; + else + DEBUG(D_acl) + { + if (Ustrcmp(sender_vaddr->address, verify_sender_address) != 0) + debug_printf_indent("sender %s verified ok as %s\n", + verify_sender_address, sender_vaddr->address); + else + debug_printf_indent("sender %s verified ok\n", + verify_sender_address); + } } - else rc = OK; /* Null sender */ + else + rc = OK; /* Null sender */ /* Cache the result code */ @@ -1950,7 +2022,7 @@ else if (verify_sender_address != NULL) /* Put the sender address_data value into $sender_address_data */ - sender_address_data = sender_vaddr->p.address_data; + sender_address_data = sender_vaddr->prop.address_data; } /* A recipient address just gets a straightforward verify; again we must handle @@ -1969,7 +2041,7 @@ else addr2 = *addr; rc = verify_address(&addr2, NULL, verify_options|vopt_is_recipient, callout, callout_overall, callout_connect, se_mailfrom, pm_mailfrom, NULL); - HDEBUG(D_acl) debug_printf("----------- end verify ------------\n"); + HDEBUG(D_acl) debug_printf_indent("----------- end verify ------------\n"); *basic_errno = addr2.basic_errno; *log_msgptr = addr2.message; @@ -1977,10 +2049,10 @@ else addr2.user_message : addr2.message; /* Allow details for temporary error if the address is so flagged. */ - if (testflag((&addr2), af_pass_message)) acl_temp_details = TRUE; + if (testflag((&addr2), af_pass_message)) f.acl_temp_details = TRUE; /* Make $address_data visible */ - deliver_address_data = addr2.p.address_data; + deliver_address_data = addr2.prop.address_data; } /* We have a result from the relevant test. Handle defer overrides first. */ @@ -1988,7 +2060,7 @@ else if (rc == DEFER && (defer_ok || (callout_defer_ok && *basic_errno == ERRNO_CALLOUTDEFER))) { - HDEBUG(D_acl) debug_printf("verify defer overridden by %s\n", + HDEBUG(D_acl) debug_printf_indent("verify defer overridden by %s\n", defer_ok? "defer_ok" : "callout_defer_ok"); rc = OK; } @@ -1999,13 +2071,9 @@ sender_verified_failed to the address item that actually failed. */ if (rc != OK && verify_sender_address != NULL) { if (rc != DEFER) - { *log_msgptr = *user_msgptr = US"Sender verify failed"; - } else if (*basic_errno != ERRNO_CALLOUTDEFER) - { *log_msgptr = *user_msgptr = US"Could not complete sender verify"; - } else { *log_msgptr = US"Could not complete sender verify callout"; @@ -2030,8 +2098,8 @@ return rc; BAD_VERIFY: *log_msgptr = string_sprintf("expected \"sender[=address]\", \"recipient\", " - "\"helo\", \"header_syntax\", \"header_sender\" or " - "\"reverse_host_lookup\" at start of ACL condition " + "\"helo\", \"header_syntax\", \"header_sender\", \"header_names_ascii\" " + "or \"reverse_host_lookup\" at start of ACL condition " "\"verify %s\"", arg); return ERROR; } @@ -2055,28 +2123,22 @@ Returns: CONTROL_xxx value */ static int -decode_control(uschar *arg, uschar **pptr, int where, uschar **log_msgptr) +decode_control(const uschar *arg, const uschar **pptr, int where, uschar **log_msgptr) { -int len; -control_def *d; +int idx, len; +control_def * d; -for (d = controls_list; - d < controls_list + sizeof(controls_list)/sizeof(control_def); - d++) - { - len = Ustrlen(d->name); - if (Ustrncmp(d->name, arg, len) == 0) break; - } - -if (d >= controls_list + sizeof(controls_list)/sizeof(control_def) || - (arg[len] != 0 && (!d->has_option || arg[len] != '/'))) +if ( (idx = find_control(arg, controls_list, nelem(controls_list))) < 0 + || ( arg[len = Ustrlen((d = controls_list+idx)->name)] != 0 + && (!d->has_option || arg[len] != '/') + ) ) { *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); return CONTROL_ERROR; } *pptr = arg + len; -return d->value; +return idx; } @@ -2092,8 +2154,6 @@ Arguments: log_msgptr for error messages format format string ... supplementary arguments - ss ratelimit option name - where ACL_WHERE_xxxx indicating which ACL this is Returns: ERROR */ @@ -2102,14 +2162,15 @@ static int ratelimit_error(uschar **log_msgptr, const char *format, ...) { va_list ap; -uschar buffer[STRING_SPRINTF_BUFFER_SIZE]; +gstring * g = + string_cat(NULL, US"error in arguments to \"ratelimit\" condition: "); + va_start(ap, format); -if (!string_vformat(buffer, sizeof(buffer), format, ap)) - log_write(0, LOG_MAIN|LOG_PANIC_DIE, - "string_sprintf expansion was longer than " SIZE_T_FMT, sizeof(buffer)); +g = string_vformat(g, TRUE, format, ap); va_end(ap); -*log_msgptr = string_sprintf( - "error in arguments to \"ratelimit\" condition: %s", buffer); + +gstring_reset_unused(g); +*log_msgptr = string_from_gstring(g); return ERROR; } @@ -2140,7 +2201,7 @@ Returns: OK - Sender's rate is above limit */ static int -acl_ratelimit(uschar *arg, int where, uschar **log_msgptr) +acl_ratelimit(const uschar *arg, int where, uschar **log_msgptr) { double limit, period, count; uschar *ss; @@ -2166,16 +2227,14 @@ error messages based on rate limits obtained from a table lookup. */ size, which must be greater than or equal to zero. Zero is useful for rate measurement as opposed to rate limiting. */ -sender_rate_limit = string_nextinlist(&arg, &sep, NULL, 0); -if (sender_rate_limit == NULL) - limit = -1.0; -else - { - limit = Ustrtod(sender_rate_limit, &ss); - if (tolower(*ss) == 'k') { limit *= 1024.0; ss++; } - else if (tolower(*ss) == 'm') { limit *= 1024.0*1024.0; ss++; } - else if (tolower(*ss) == 'g') { limit *= 1024.0*1024.0*1024.0; ss++; } - } +if (!(sender_rate_limit = string_nextinlist(&arg, &sep, NULL, 0))) + return ratelimit_error(log_msgptr, "sender rate limit not set"); + +limit = Ustrtod(sender_rate_limit, &ss); +if (tolower(*ss) == 'k') { limit *= 1024.0; ss++; } +else if (tolower(*ss) == 'm') { limit *= 1024.0*1024.0; ss++; } +else if (tolower(*ss) == 'g') { limit *= 1024.0*1024.0*1024.0; ss++; } + if (limit < 0.0 || *ss != '\0') return ratelimit_error(log_msgptr, "\"%s\" is not a positive number", sender_rate_limit); @@ -2184,9 +2243,8 @@ if (limit < 0.0 || *ss != '\0') constant. This must be strictly greater than zero, because zero leads to run-time division errors. */ -sender_rate_period = string_nextinlist(&arg, &sep, NULL, 0); -if (sender_rate_period == NULL) period = -1.0; -else period = readconf_readtime(sender_rate_period, 0, FALSE); +period = !(sender_rate_period = string_nextinlist(&arg, &sep, NULL, 0)) + ? -1.0 : readconf_readtime(sender_rate_period, 0, FALSE); if (period <= 0.0) return ratelimit_error(log_msgptr, "\"%s\" is not a time value", sender_rate_period); @@ -2198,8 +2256,7 @@ count = 1.0; /* Parse the other options. */ -while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)) - != NULL) +while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size))) { if (strcmpic(ss, US"leaky") == 0) leaky = TRUE; else if (strcmpic(ss, US"strict") == 0) strict = TRUE; @@ -2232,29 +2289,28 @@ while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)) else if (strcmpic(ss, US"per_byte") == 0) { /* If we have not yet received the message data and there was no SIZE - declaration on the MAIL comand, then it's safe to just use a value of + declaration on the MAIL command, then it's safe to just use a value of zero and let the recorded rate decay as if nothing happened. */ RATE_SET(mode, PER_MAIL); if (where > ACL_WHERE_NOTSMTP) badacl = TRUE; - else count = message_size < 0 ? 0.0 : (double)message_size; + else count = message_size < 0 ? 0.0 : (double)message_size; } else if (strcmpic(ss, US"per_addr") == 0) { RATE_SET(mode, PER_RCPT); if (where != ACL_WHERE_RCPT) badacl = TRUE, unique = US"*"; - else unique = string_sprintf("%s@%s", deliver_localpart, deliver_domain); + else unique = string_sprintf("%s@%s", deliver_localpart, deliver_domain); } else if (strncmpic(ss, US"count=", 6) == 0) { uschar *e; count = Ustrtod(ss+6, &e); if (count < 0.0 || *e != '\0') - return ratelimit_error(log_msgptr, - "\"%s\" is not a positive number", ss); + return ratelimit_error(log_msgptr, "\"%s\" is not a positive number", ss); } else if (strncmpic(ss, US"unique=", 7) == 0) unique = string_copy(ss + 7); - else if (key == NULL) + else if (!key) key = string_copy(ss); else key = string_sprintf("%s/%s", key, ss); @@ -2270,7 +2326,7 @@ if (leaky + strict + readonly > 1) return ratelimit_error(log_msgptr, "conflicting update modes"); if (badacl && (leaky || strict) && !noupdate) return ratelimit_error(log_msgptr, - "\"%s\" must not have /leaky or /strict option in %s ACL", + "\"%s\" must not have /leaky or /strict option, or cannot be used in %s ACL", ratelimit_option_string[mode], acl_wherenames[where]); /* Set the default values of any unset options. In readonly mode we @@ -2288,8 +2344,8 @@ If there is no sender_host_address (e.g. -bs or acl_not_smtp) then we simply omit it. The smoothing constant (sender_rate_period) and the per_xxx options are added to the key because they alter the meaning of the stored data. */ -if (key == NULL) - key = (sender_host_address == NULL)? US"" : sender_host_address; +if (!key) + key = !sender_host_address ? US"" : sender_host_address; key = string_sprintf("%s/%s/%s%s", sender_rate_period, @@ -2298,7 +2354,7 @@ key = string_sprintf("%s/%s/%s%s", key); HDEBUG(D_acl) - debug_printf("ratelimit condition count=%.0f %.1f/%s\n", count, limit, key); + debug_printf_indent("ratelimit condition count=%.0f %.1f/%s\n", count, limit, key); /* See if we have already computed the rate by looking in the relevant tree. For per-connection rate limiting, store tree nodes and dbdata in the permanent @@ -2310,30 +2366,30 @@ old_pool = store_pool; if (readonly) anchor = &ratelimiters_cmd; -else switch(mode) { -case RATE_PER_CONN: - anchor = &ratelimiters_conn; - store_pool = POOL_PERM; - break; -case RATE_PER_BYTE: -case RATE_PER_MAIL: -case RATE_PER_ALLRCPTS: - anchor = &ratelimiters_mail; - break; -case RATE_PER_ADDR: -case RATE_PER_CMD: -case RATE_PER_RCPT: - anchor = &ratelimiters_cmd; - break; -default: - anchor = NULL; /* silence an "unused" complaint */ - log_write(0, LOG_MAIN|LOG_PANIC_DIE, - "internal ACL error: unknown ratelimit mode %d", mode); - break; -} +else switch(mode) + { + case RATE_PER_CONN: + anchor = &ratelimiters_conn; + store_pool = POOL_PERM; + break; + case RATE_PER_BYTE: + case RATE_PER_MAIL: + case RATE_PER_ALLRCPTS: + anchor = &ratelimiters_mail; + break; + case RATE_PER_ADDR: + case RATE_PER_CMD: + case RATE_PER_RCPT: + anchor = &ratelimiters_cmd; + break; + default: + anchor = NULL; /* silence an "unused" complaint */ + log_write(0, LOG_MAIN|LOG_PANIC_DIE, + "internal ACL error: unknown ratelimit mode %d", mode); + break; + } -t = tree_search(*anchor, key); -if (t != NULL) +if ((t = tree_search(*anchor, key))) { dbd = t->data.ptr; /* The following few lines duplicate some of the code below. */ @@ -2341,19 +2397,18 @@ if (t != NULL) store_pool = old_pool; sender_rate = string_sprintf("%.1f", dbd->rate); HDEBUG(D_acl) - debug_printf("ratelimit found pre-computed rate %s\n", sender_rate); + debug_printf_indent("ratelimit found pre-computed rate %s\n", sender_rate); return rc; } /* We aren't using a pre-computed rate, so get a previously recorded rate from the database, which will be updated and written back if required. */ -dbm = dbfn_open(US"ratelimit", O_RDWR, &dbblock, TRUE); -if (dbm == NULL) +if (!(dbm = dbfn_open(US"ratelimit", O_RDWR, &dbblock, TRUE))) { store_pool = old_pool; sender_rate = NULL; - HDEBUG(D_acl) debug_printf("ratelimit database not available\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit database not available\n"); *log_msgptr = US"ratelimit database not available"; return DEFER; } @@ -2362,10 +2417,10 @@ dbd = NULL; gettimeofday(&tv, NULL); -if (dbdb != NULL) +if (dbdb) { /* Locate the basic ratelimit block inside the DB data. */ - HDEBUG(D_acl) debug_printf("ratelimit found key in database\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit found key in database\n"); dbd = &dbdb->dbd; /* Forget the old Bloom filter if it is too old, so that we count each @@ -2373,17 +2428,17 @@ if (dbdb != NULL) filter because we want its size to change if the limit changes. Note that we keep the dbd pointer for copying the rate into the new data block. */ - if(unique != NULL && tv.tv_sec > dbdb->bloom_epoch + period) + if(unique && tv.tv_sec > dbdb->bloom_epoch + period) { - HDEBUG(D_acl) debug_printf("ratelimit discarding old Bloom filter\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit discarding old Bloom filter\n"); dbdb = NULL; } /* Sanity check. */ - if(unique != NULL && dbdb_size < sizeof(*dbdb)) + if(unique && dbdb_size < sizeof(*dbdb)) { - HDEBUG(D_acl) debug_printf("ratelimit discarding undersize Bloom filter\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit discarding undersize Bloom filter\n"); dbdb = NULL; } } @@ -2391,19 +2446,19 @@ if (dbdb != NULL) /* Allocate a new data block if the database lookup failed or the Bloom filter passed its age limit. */ -if (dbdb == NULL) +if (!dbdb) { - if (unique == NULL) + if (!unique) { /* No Bloom filter. This basic ratelimit block is initialized below. */ - HDEBUG(D_acl) debug_printf("ratelimit creating new rate data block\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit creating new rate data block\n"); dbdb_size = sizeof(*dbd); dbdb = store_get(dbdb_size); } else { int extra; - HDEBUG(D_acl) debug_printf("ratelimit creating new Bloom filter\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit creating new Bloom filter\n"); /* See the long comment below for an explanation of the magic number 2. The filter has a minimum size in case the rate limit is very small; @@ -2420,7 +2475,7 @@ if (dbdb == NULL) /* Preserve any basic ratelimit data (which is our longer-term memory) by copying it from the discarded block. */ - if (dbd != NULL) + if (dbd) { dbdb->dbd = *dbd; dbd = &dbdb->dbd; @@ -2434,7 +2489,7 @@ counted. We skip this code in readonly mode for efficiency, because any changes to the filter will be discarded and because count is already set to zero. */ -if (unique != NULL && !readonly) +if (unique && !readonly) { /* We identify unique events using a Bloom filter. (You can find my notes on Bloom filters at http://fanf.livejournal.com/81696.html) @@ -2487,7 +2542,7 @@ if (unique != NULL && !readonly) /* Scan the bits corresponding to this event. A zero bit means we have not seen it before. Ensure all bits are set to record this event. */ - HDEBUG(D_acl) debug_printf("ratelimit checking uniqueness of %s\n", unique); + HDEBUG(D_acl) debug_printf_indent("ratelimit checking uniqueness of %s\n", unique); seen = TRUE; for (n = 0; n < 8; n++, hash += hinc) @@ -2505,20 +2560,20 @@ if (unique != NULL && !readonly) if (seen) { - HDEBUG(D_acl) debug_printf("ratelimit event found in Bloom filter\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit event found in Bloom filter\n"); count = 0.0; } else - HDEBUG(D_acl) debug_printf("ratelimit event added to Bloom filter\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit event added to Bloom filter\n"); } /* If there was no previous ratelimit data block for this key, initialize the new one, otherwise update the block from the database. The initial rate is what would be computed by the code below for an infinite interval. */ -if (dbd == NULL) +if (!dbd) { - HDEBUG(D_acl) debug_printf("ratelimit initializing new key's rate data\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit initializing new key's rate data\n"); dbd = &dbdb->dbd; dbd->time_stamp = tv.tv_sec; dbd->time_usec = tv.tv_usec; @@ -2598,7 +2653,7 @@ else size of the event per the period size, ignoring the lack of events outside the current period and regardless of where the event falls in the period. So, if the interval was so long that the calculated rate is unhelpfully small, we - re-intialize the rate. In the absence of higher-rate bursts, the condition + re-initialize the rate. In the absence of higher-rate bursts, the condition below is true if the interval is greater than the period. */ if (dbd->rate < count) dbd->rate = count; @@ -2608,7 +2663,7 @@ else This matters for edge cases such as a limit of zero, when the client should be completely blocked. */ -rc = (dbd->rate < limit)? FAIL : OK; +rc = dbd->rate < limit ? FAIL : OK; /* Update the state if the rate is low or if we are being strict. If we are in leaky mode and the sender's rate is too high, we do not update @@ -2619,11 +2674,11 @@ neither leaky nor strict are set, so we do not do any updates. */ if ((rc == FAIL && leaky) || strict) { dbfn_write(dbm, key, dbdb, dbdb_size); - HDEBUG(D_acl) debug_printf("ratelimit db updated\n"); + HDEBUG(D_acl) debug_printf_indent("ratelimit db updated\n"); } else { - HDEBUG(D_acl) debug_printf("ratelimit db not updated: %s\n", + HDEBUG(D_acl) debug_printf_indent("ratelimit db not updated: %s\n", readonly? "readonly mode" : "over the limit, but leaky"); } @@ -2643,13 +2698,118 @@ store_pool = old_pool; sender_rate = string_sprintf("%.1f", dbd->rate); HDEBUG(D_acl) - debug_printf("ratelimit computed rate %s\n", sender_rate); + debug_printf_indent("ratelimit computed rate %s\n", sender_rate); return rc; } +/************************************************* +* The udpsend ACL modifier * +*************************************************/ + +/* Called by acl_check_condition() below. + +Arguments: + arg the option string for udpsend= + log_msgptr for error messages + +Returns: OK - Completed. + DEFER - Problem with DNS lookup. + ERROR - Syntax error in options. +*/ + +static int +acl_udpsend(const uschar *arg, uschar **log_msgptr) +{ +int sep = 0; +uschar *hostname; +uschar *portstr; +uschar *portend; +host_item *h; +int portnum; +int len; +int r, s; +uschar * errstr; + +hostname = string_nextinlist(&arg, &sep, NULL, 0); +portstr = string_nextinlist(&arg, &sep, NULL, 0); + +if (!hostname) + { + *log_msgptr = US"missing destination host in \"udpsend\" modifier"; + return ERROR; + } +if (!portstr) + { + *log_msgptr = US"missing destination port in \"udpsend\" modifier"; + return ERROR; + } +if (!arg) + { + *log_msgptr = US"missing datagram payload in \"udpsend\" modifier"; + return ERROR; + } +portnum = Ustrtol(portstr, &portend, 10); +if (*portend != '\0') + { + *log_msgptr = US"bad destination port in \"udpsend\" modifier"; + return ERROR; + } + +/* Make a single-item host list. */ +h = store_get(sizeof(host_item)); +memset(h, 0, sizeof(host_item)); +h->name = hostname; +h->port = portnum; +h->mx = MX_NONE; + +if (string_is_ip_address(hostname, NULL)) + h->address = hostname, r = HOST_FOUND; +else + r = host_find_byname(h, NULL, 0, NULL, FALSE); +if (r == HOST_FIND_FAILED || r == HOST_FIND_AGAIN) + { + *log_msgptr = US"DNS lookup failed in \"udpsend\" modifier"; + return DEFER; + } + +HDEBUG(D_acl) + debug_printf_indent("udpsend [%s]:%d %s\n", h->address, portnum, arg); + +/*XXX this could better use sendto */ +r = s = ip_connectedsocket(SOCK_DGRAM, h->address, portnum, portnum, + 1, NULL, &errstr, NULL); +if (r < 0) goto defer; +len = Ustrlen(arg); +r = send(s, arg, len, 0); +if (r < 0) + { + errstr = US strerror(errno); + close(s); + goto defer; + } +close(s); +if (r < len) + { + *log_msgptr = + string_sprintf("\"udpsend\" truncated from %d to %d octets", len, r); + return DEFER; + } + +HDEBUG(D_acl) + debug_printf_indent("udpsend %d bytes\n", r); + +return OK; + +defer: +*log_msgptr = string_sprintf("\"udpsend\" failed: %s", errstr); +return DEFER; +} + + + /************************************************* * Handle conditions/modifiers on an ACL item * *************************************************/ @@ -2686,17 +2846,14 @@ acl_check_condition(int verb, acl_condition_block *cb, int where, { uschar *user_message = NULL; uschar *log_message = NULL; -uschar *debug_tag = NULL; -uschar *debug_opts = NULL; -uschar *p = NULL; int rc = OK; #ifdef WITH_CONTENT_SCAN -int sep = '/'; +int sep = -'/'; #endif -for (; cb != NULL; cb = cb->next) +for (; cb; cb = cb->next) { - uschar *arg; + const uschar *arg; int control_type; /* The message and log_message items set up messages to be used in @@ -2704,12 +2861,14 @@ for (; cb != NULL; cb = cb->next) if (cb->type == ACLC_MESSAGE) { + HDEBUG(D_acl) debug_printf_indent(" message: %s\n", cb->arg); user_message = cb->arg; continue; } if (cb->type == ACLC_LOG_MESSAGE) { + HDEBUG(D_acl) debug_printf_indent("l_message: %s\n", cb->arg); log_message = cb->arg; continue; } @@ -2727,32 +2886,40 @@ for (; cb != NULL; cb = cb->next) of them, but not for all, because expansion happens down in some lower level checking functions in some cases. */ - if (cond_expand_at_top[cb->type]) + if (!conditions[cb->type].expand_at_top) + arg = cb->arg; + else if (!(arg = expand_string(cb->arg))) { - arg = expand_string(cb->arg); - if (arg == NULL) - { - if (expand_string_forcedfail) continue; - *log_msgptr = string_sprintf("failed to expand ACL string \"%s\": %s", - cb->arg, expand_string_message); - return search_find_defer? DEFER : ERROR; - } + if (f.expand_string_forcedfail) continue; + *log_msgptr = string_sprintf("failed to expand ACL string \"%s\": %s", + cb->arg, expand_string_message); + return f.search_find_defer ? DEFER : ERROR; } - else arg = cb->arg; /* Show condition, and expanded condition if it's different */ HDEBUG(D_acl) { int lhswidth = 0; - debug_printf("check %s%s %n", - (!cond_modifiers[cb->type] && cb->u.negated)? "!":"", - conditions[cb->type], &lhswidth); + debug_printf_indent("check %s%s %n", + (!conditions[cb->type].is_modifier && cb->u.negated)? "!":"", + conditions[cb->type].name, &lhswidth); if (cb->type == ACLC_SET) { - debug_printf("acl_%s ", cb->u.varname); - lhswidth += 5 + Ustrlen(cb->u.varname); +#ifndef DISABLE_DKIM + if ( Ustrcmp(cb->u.varname, "dkim_verify_status") == 0 + || Ustrcmp(cb->u.varname, "dkim_verify_reason") == 0) + { + debug_printf("%s ", cb->u.varname); + lhswidth += 19; + } + else +#endif + { + debug_printf("acl_%s ", cb->u.varname); + lhswidth += 5 + Ustrlen(cb->u.varname); + } } debug_printf("= %s\n", cb->arg); @@ -2764,314 +2931,427 @@ for (; cb != NULL; cb = cb->next) /* Check that this condition makes sense at this time */ - if ((cond_forbids[cb->type] & (1 << where)) != 0) - { - *log_msgptr = string_sprintf("cannot %s %s condition in %s ACL", - cond_modifiers[cb->type]? "use" : "test", - conditions[cb->type], acl_wherenames[where]); - return ERROR; - } - - /* Run the appropriate test for each condition, or take the appropriate - action for the remaining modifiers. */ - - switch(cb->type) - { - case ACLC_ADD_HEADER: - setup_header(arg); - break; - - /* A nested ACL that returns "discard" makes sense only for an "accept" or - "discard" verb. */ - - case ACLC_ACL: - rc = acl_check_internal(where, addr, arg, level+1, user_msgptr, log_msgptr); - if (rc == DISCARD && verb != ACL_ACCEPT && verb != ACL_DISCARD) - { - *log_msgptr = string_sprintf("nested ACL returned \"discard\" for " - "\"%s\" command (only allowed with \"accept\" or \"discard\")", - verbs[verb]); - return ERROR; - } - break; - - case ACLC_AUTHENTICATED: - rc = (sender_host_authenticated == NULL)? FAIL : - match_isinlist(sender_host_authenticated, &arg, 0, NULL, NULL, MCL_STRING, - TRUE, NULL); - break; - - #ifdef EXPERIMENTAL_BRIGHTMAIL - case ACLC_BMI_OPTIN: - { - int old_pool = store_pool; - store_pool = POOL_PERM; - bmi_current_optin = string_copy(arg); - store_pool = old_pool; - } - break; - #endif - - case ACLC_CONDITION: - /* The true/false parsing here should be kept in sync with that used in - expand.c when dealing with ECOND_BOOL so that we don't have too many - different definitions of what can be a boolean. */ - if (Ustrspn(arg, "0123456789") == Ustrlen(arg)) /* Digits, or empty */ - rc = (Uatoi(arg) == 0)? FAIL : OK; - else - rc = (strcmpic(arg, US"no") == 0 || - strcmpic(arg, US"false") == 0)? FAIL : - (strcmpic(arg, US"yes") == 0 || - strcmpic(arg, US"true") == 0)? OK : DEFER; - if (rc == DEFER) - *log_msgptr = string_sprintf("invalid \"condition\" value \"%s\"", arg); - break; - - case ACLC_CONTINUE: /* Always succeeds */ - break; - - case ACLC_CONTROL: - control_type = decode_control(arg, &p, where, log_msgptr); - - /* Check if this control makes sense at this time */ - - if ((control_forbids[control_type] & (1 << where)) != 0) - { - *log_msgptr = string_sprintf("cannot use \"control=%s\" in %s ACL", - controls[control_type], acl_wherenames[where]); - return ERROR; - } - - switch(control_type) - { - case CONTROL_AUTH_UNADVERTISED: - allow_auth_unadvertised = TRUE; - break; - - #ifdef EXPERIMENTAL_BRIGHTMAIL - case CONTROL_BMI_RUN: - bmi_run = 1; - break; - #endif - - #ifndef DISABLE_DKIM - case CONTROL_DKIM_VERIFY: - dkim_disable_verify = TRUE; - break; - #endif - - case CONTROL_DSCP: - if (*p == '/') - { - int fd, af, level, optname, value; - /* If we are acting on stdin, the setsockopt may fail if stdin is not - a socket; we can accept that, we'll just debug-log failures anyway. */ - fd = fileno(smtp_in); - af = ip_get_address_family(fd); - if (af < 0) - { - HDEBUG(D_acl) - debug_printf("smtp input is probably not a socket [%s], not setting DSCP\n", - strerror(errno)); - break; - } - if (dscp_lookup(p+1, af, &level, &optname, &value)) - { - if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0) - { - HDEBUG(D_acl) debug_printf("failed to set input DSCP[%s]: %s\n", - p+1, strerror(errno)); - } - else - { - HDEBUG(D_acl) debug_printf("set input DSCP to \"%s\"\n", p+1); - } - } - else - { - *log_msgptr = string_sprintf("unrecognised DSCP value in \"control=%s\"", arg); - return ERROR; - } - } - else - { - *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); - return ERROR; - } - break; - - case CONTROL_ERROR: - return ERROR; - - case CONTROL_CASEFUL_LOCAL_PART: - deliver_localpart = addr->cc_local_part; - break; - - case CONTROL_CASELOWER_LOCAL_PART: - deliver_localpart = addr->lc_local_part; - break; - - case CONTROL_ENFORCE_SYNC: - smtp_enforce_sync = TRUE; - break; - - case CONTROL_NO_ENFORCE_SYNC: - smtp_enforce_sync = FALSE; - break; - - #ifdef WITH_CONTENT_SCAN - case CONTROL_NO_MBOX_UNSPOOL: - no_mbox_unspool = TRUE; - break; - #endif - - case CONTROL_NO_MULTILINE: - no_multiline_responses = TRUE; - break; - - case CONTROL_NO_PIPELINING: - pipelining_enable = FALSE; - break; + if ((conditions[cb->type].forbids & (1 << where)) != 0) + { + *log_msgptr = string_sprintf("cannot %s %s condition in %s ACL", + conditions[cb->type].is_modifier ? "use" : "test", + conditions[cb->type].name, acl_wherenames[where]); + return ERROR; + } - case CONTROL_NO_DELAY_FLUSH: - disable_delay_flush = TRUE; - break; + /* Run the appropriate test for each condition, or take the appropriate + action for the remaining modifiers. */ - case CONTROL_NO_CALLOUT_FLUSH: - disable_callout_flush = TRUE; - break; + switch(cb->type) + { + case ACLC_ADD_HEADER: + setup_header(arg); + break; - case CONTROL_FAKEDEFER: - case CONTROL_FAKEREJECT: - fake_response = (control_type == CONTROL_FAKEDEFER) ? DEFER : FAIL; - if (*p == '/') - { - uschar *pp = p + 1; - while (*pp != 0) pp++; - fake_response_text = expand_string(string_copyn(p+1, pp-p-1)); - p = pp; - } - else - { - /* Explicitly reset to default string */ - fake_response_text = US"Your message has been rejected but is being kept for evaluation.\nIf it was a legitimate message, it may still be delivered to the target recipient(s)."; - } - break; + /* A nested ACL that returns "discard" makes sense only for an "accept" or + "discard" verb. */ - case CONTROL_FREEZE: - deliver_freeze = TRUE; - deliver_frozen_at = time(NULL); - freeze_tell = freeze_tell_config; /* Reset to configured value */ - if (Ustrncmp(p, "/no_tell", 8) == 0) - { - p += 8; - freeze_tell = NULL; - } - if (*p != 0) + case ACLC_ACL: + rc = acl_check_wargs(where, addr, arg, user_msgptr, log_msgptr); + if (rc == DISCARD && verb != ACL_ACCEPT && verb != ACL_DISCARD) { - *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); + *log_msgptr = string_sprintf("nested ACL returned \"discard\" for " + "\"%s\" command (only allowed with \"accept\" or \"discard\")", + verbs[verb]); return ERROR; } - break; + break; - case CONTROL_QUEUE_ONLY: - queue_only_policy = TRUE; - break; + case ACLC_AUTHENTICATED: + rc = sender_host_authenticated ? match_isinlist(sender_host_authenticated, + &arg, 0, NULL, NULL, MCL_STRING, TRUE, NULL) : FAIL; + break; - case CONTROL_SUBMISSION: - originator_name = US""; - submission_mode = TRUE; - while (*p == '/') - { - if (Ustrncmp(p, "/sender_retain", 14) == 0) - { - p += 14; - active_local_sender_retain = TRUE; - active_local_from_check = FALSE; - } - else if (Ustrncmp(p, "/domain=", 8) == 0) - { - uschar *pp = p + 8; - while (*pp != 0 && *pp != '/') pp++; - submission_domain = string_copyn(p+8, pp-p-8); - p = pp; - } - /* The name= option must be last, because it swallows the rest of - the string. */ - else if (Ustrncmp(p, "/name=", 6) == 0) - { - uschar *pp = p + 6; - while (*pp != 0) pp++; - submission_name = string_copy(parse_fix_phrase(p+6, pp-p-6, - big_buffer, big_buffer_size)); - p = pp; - } - else break; - } - if (*p != 0) - { - *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); - return ERROR; - } - break; + #ifdef EXPERIMENTAL_BRIGHTMAIL + case ACLC_BMI_OPTIN: + { + int old_pool = store_pool; + store_pool = POOL_PERM; + bmi_current_optin = string_copy(arg); + store_pool = old_pool; + } + break; + #endif - case CONTROL_DEBUG: - while (*p == '/') - { - if (Ustrncmp(p, "/tag=", 5) == 0) - { - uschar *pp = p + 5; - while (*pp != '\0' && *pp != '/') pp++; - debug_tag = string_copyn(p+5, pp-p-5); - p = pp; - } - else if (Ustrncmp(p, "/opts=", 6) == 0) - { - uschar *pp = p + 6; - while (*pp != '\0' && *pp != '/') pp++; - debug_opts = string_copyn(p+6, pp-p-6); - p = pp; - } - } - debug_logging_activate(debug_tag, debug_opts); - break; + case ACLC_CONDITION: + /* The true/false parsing here should be kept in sync with that used in + expand.c when dealing with ECOND_BOOL so that we don't have too many + different definitions of what can be a boolean. */ + if (*arg == '-' + ? Ustrspn(arg+1, "0123456789") == Ustrlen(arg+1) /* Negative number */ + : Ustrspn(arg, "0123456789") == Ustrlen(arg)) /* Digits, or empty */ + rc = (Uatoi(arg) == 0)? FAIL : OK; + else + rc = (strcmpic(arg, US"no") == 0 || + strcmpic(arg, US"false") == 0)? FAIL : + (strcmpic(arg, US"yes") == 0 || + strcmpic(arg, US"true") == 0)? OK : DEFER; + if (rc == DEFER) + *log_msgptr = string_sprintf("invalid \"condition\" value \"%s\"", arg); + break; - case CONTROL_SUPPRESS_LOCAL_FIXUPS: - suppress_local_fixups = TRUE; - break; + case ACLC_CONTINUE: /* Always succeeds */ + break; - case CONTROL_CUTTHROUGH_DELIVERY: - if (deliver_freeze) - { - *log_msgptr = string_sprintf("\"control=%s\" on frozen item", arg); - return ERROR; - } - if (queue_only_policy) - { - *log_msgptr = string_sprintf("\"control=%s\" on queue-only item", arg); - return ERROR; - } - cutthrough_delivery = TRUE; + case ACLC_CONTROL: + { + const uschar *p = NULL; + control_type = decode_control(arg, &p, where, log_msgptr); + + /* Check if this control makes sense at this time */ + + if (controls_list[control_type].forbids & (1 << where)) + { + *log_msgptr = string_sprintf("cannot use \"control=%s\" in %s ACL", + controls_list[control_type].name, acl_wherenames[where]); + return ERROR; + } + + switch(control_type) + { + case CONTROL_AUTH_UNADVERTISED: + f.allow_auth_unadvertised = TRUE; + break; + + #ifdef EXPERIMENTAL_BRIGHTMAIL + case CONTROL_BMI_RUN: + bmi_run = 1; + break; + #endif + + #ifndef DISABLE_DKIM + case CONTROL_DKIM_VERIFY: + f.dkim_disable_verify = TRUE; + #ifdef EXPERIMENTAL_DMARC + /* Since DKIM was blocked, skip DMARC too */ + f.dmarc_disable_verify = TRUE; + f.dmarc_enable_forensic = FALSE; + #endif + break; + #endif + + #ifdef EXPERIMENTAL_DMARC + case CONTROL_DMARC_VERIFY: + f.dmarc_disable_verify = TRUE; + break; + + case CONTROL_DMARC_FORENSIC: + f.dmarc_enable_forensic = TRUE; + break; + #endif + + case CONTROL_DSCP: + if (*p == '/') + { + int fd, af, level, optname, value; + /* If we are acting on stdin, the setsockopt may fail if stdin is not + a socket; we can accept that, we'll just debug-log failures anyway. */ + fd = fileno(smtp_in); + af = ip_get_address_family(fd); + if (af < 0) + { + HDEBUG(D_acl) + debug_printf_indent("smtp input is probably not a socket [%s], not setting DSCP\n", + strerror(errno)); + break; + } + if (dscp_lookup(p+1, af, &level, &optname, &value)) + { + if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0) + { + HDEBUG(D_acl) debug_printf_indent("failed to set input DSCP[%s]: %s\n", + p+1, strerror(errno)); + } + else + { + HDEBUG(D_acl) debug_printf_indent("set input DSCP to \"%s\"\n", p+1); + } + } + else + { + *log_msgptr = string_sprintf("unrecognised DSCP value in \"control=%s\"", arg); + return ERROR; + } + } + else + { + *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); + return ERROR; + } + break; + + case CONTROL_ERROR: + return ERROR; + + case CONTROL_CASEFUL_LOCAL_PART: + deliver_localpart = addr->cc_local_part; + break; + + case CONTROL_CASELOWER_LOCAL_PART: + deliver_localpart = addr->lc_local_part; + break; + + case CONTROL_ENFORCE_SYNC: + smtp_enforce_sync = TRUE; + break; + + case CONTROL_NO_ENFORCE_SYNC: + smtp_enforce_sync = FALSE; + break; + + #ifdef WITH_CONTENT_SCAN + case CONTROL_NO_MBOX_UNSPOOL: + f.no_mbox_unspool = TRUE; + break; + #endif + + case CONTROL_NO_MULTILINE: + f.no_multiline_responses = TRUE; + break; + + case CONTROL_NO_PIPELINING: + f.pipelining_enable = FALSE; + break; + + case CONTROL_NO_DELAY_FLUSH: + f.disable_delay_flush = TRUE; + break; + + case CONTROL_NO_CALLOUT_FLUSH: + f.disable_callout_flush = TRUE; + break; + + case CONTROL_FAKEREJECT: + cancel_cutthrough_connection(TRUE, US"fakereject"); + case CONTROL_FAKEDEFER: + fake_response = (control_type == CONTROL_FAKEDEFER) ? DEFER : FAIL; + if (*p == '/') + { + const uschar *pp = p + 1; + while (*pp) pp++; + fake_response_text = expand_string(string_copyn(p+1, pp-p-1)); + p = pp; + } + else + { + /* Explicitly reset to default string */ + fake_response_text = US"Your message has been rejected but is being kept for evaluation.\nIf it was a legitimate message, it may still be delivered to the target recipient(s)."; + } + break; + + case CONTROL_FREEZE: + f.deliver_freeze = TRUE; + deliver_frozen_at = time(NULL); + freeze_tell = freeze_tell_config; /* Reset to configured value */ + if (Ustrncmp(p, "/no_tell", 8) == 0) + { + p += 8; + freeze_tell = NULL; + } + if (*p != 0) + { + *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); + return ERROR; + } + cancel_cutthrough_connection(TRUE, US"item frozen"); + break; + + case CONTROL_QUEUE_ONLY: + f.queue_only_policy = TRUE; + cancel_cutthrough_connection(TRUE, US"queueing forced"); + break; + +#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS) + case CONTROL_REQUIRETLS: + tls_requiretls |= REQUIRETLS_MSG; + break; +#endif + case CONTROL_SUBMISSION: + originator_name = US""; + f.submission_mode = TRUE; + while (*p == '/') + { + if (Ustrncmp(p, "/sender_retain", 14) == 0) + { + p += 14; + f.active_local_sender_retain = TRUE; + f.active_local_from_check = FALSE; + } + else if (Ustrncmp(p, "/domain=", 8) == 0) + { + const uschar *pp = p + 8; + while (*pp && *pp != '/') pp++; + submission_domain = string_copyn(p+8, pp-p-8); + p = pp; + } + /* The name= option must be last, because it swallows the rest of + the string. */ + else if (Ustrncmp(p, "/name=", 6) == 0) + { + const uschar *pp = p + 6; + while (*pp) pp++; + submission_name = string_copy(parse_fix_phrase(p+6, pp-p-6, + big_buffer, big_buffer_size)); + p = pp; + } + else break; + } + if (*p != 0) + { + *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg); + return ERROR; + } + break; + + case CONTROL_DEBUG: + { + uschar * debug_tag = NULL; + uschar * debug_opts = NULL; + BOOL kill = FALSE; + + while (*p == '/') + { + const uschar * pp = p+1; + if (Ustrncmp(pp, "tag=", 4) == 0) + { + for (pp += 4; *pp && *pp != '/';) pp++; + debug_tag = string_copyn(p+5, pp-p-5); + } + else if (Ustrncmp(pp, "opts=", 5) == 0) + { + for (pp += 5; *pp && *pp != '/';) pp++; + debug_opts = string_copyn(p+6, pp-p-6); + } + else if (Ustrncmp(pp, "kill", 4) == 0) + { + for (pp += 4; *pp && *pp != '/';) pp++; + kill = TRUE; + } + else + while (*pp && *pp != '/') pp++; + p = pp; + } + + if (kill) + debug_logging_stop(); + else + debug_logging_activate(debug_tag, debug_opts); + } + break; + + case CONTROL_SUPPRESS_LOCAL_FIXUPS: + f.suppress_local_fixups = TRUE; + break; + + case CONTROL_CUTTHROUGH_DELIVERY: + { + uschar * ignored = NULL; +#ifndef DISABLE_PRDR + if (prdr_requested) +#else + if (0) +#endif + /* Too hard to think about for now. We might in future cutthrough + the case where both sides handle prdr and this-node prdr acl + is "accept" */ + ignored = US"PRDR active"; + else + { + if (f.deliver_freeze) + ignored = US"frozen"; + else if (f.queue_only_policy) + ignored = US"queue-only"; + else if (fake_response == FAIL) + ignored = US"fakereject"; + else + { + if (rcpt_count == 1) + { + cutthrough.delivery = TRUE; /* control accepted */ + while (*p == '/') + { + const uschar * pp = p+1; + if (Ustrncmp(pp, "defer=", 6) == 0) + { + pp += 6; + if (Ustrncmp(pp, "pass", 4) == 0) cutthrough.defer_pass = TRUE; + /* else if (Ustrncmp(pp, "spool") == 0) ; default */ + } + else + while (*pp && *pp != '/') pp++; + p = pp; + } + } + else + ignored = US"nonfirst rcpt"; + } + } + DEBUG(D_acl) if (ignored) + debug_printf(" cutthrough request ignored on %s item\n", ignored); + } + break; + +#ifdef SUPPORT_I18N + case CONTROL_UTF8_DOWNCONVERT: + if (*p == '/') + { + if (p[1] == '1') + { + message_utf8_downconvert = 1; + addr->prop.utf8_downcvt = TRUE; + addr->prop.utf8_downcvt_maybe = FALSE; + p += 2; + break; + } + if (p[1] == '0') + { + message_utf8_downconvert = 0; + addr->prop.utf8_downcvt = FALSE; + addr->prop.utf8_downcvt_maybe = FALSE; + p += 2; + break; + } + if (p[1] == '-' && p[2] == '1') + { + message_utf8_downconvert = -1; + addr->prop.utf8_downcvt = FALSE; + addr->prop.utf8_downcvt_maybe = TRUE; + p += 3; + break; + } + *log_msgptr = US"bad option value for control=utf8_downconvert"; + } + else + { + message_utf8_downconvert = 1; + addr->prop.utf8_downcvt = TRUE; + addr->prop.utf8_downcvt_maybe = FALSE; + break; + } + return ERROR; +#endif + + } break; } - break; #ifdef EXPERIMENTAL_DCC case ACLC_DCC: { - /* Seperate the regular expression and any optional parameters. */ - uschar *ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size); + /* Separate the regular expression and any optional parameters. */ + const uschar * list = arg; + uschar *ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size); /* Run the dcc backend. */ rc = dcc_process(&ss); - /* Modify return code based upon the existance of options. */ - while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)) - != NULL) { + /* Modify return code based upon the existence of options. */ + while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))) if (strcmpic(ss, US"defer_ok") == 0 && rc == DEFER) - { - /* FAIL so that the message is passed to the next ACL */ - rc = FAIL; - } - } + rc = FAIL; /* FAIL so that the message is passed to the next ACL */ } break; #endif @@ -3093,25 +3373,15 @@ for (; cb != NULL; cb = cb->next) } else { - HDEBUG(D_acl) debug_printf("delay modifier requests %d-second delay\n", + HDEBUG(D_acl) debug_printf_indent("delay modifier requests %d-second delay\n", delay); if (host_checking) { HDEBUG(D_acl) - debug_printf("delay skipped in -bh checking mode\n"); + debug_printf_indent("delay skipped in -bh checking mode\n"); } - /* It appears to be impossible to detect that a TCP/IP connection has - gone away without reading from it. This means that we cannot shorten - the delay below if the client goes away, because we cannot discover - that the client has closed its end of the connection. (The connection - is actually in a half-closed state, waiting for the server to close its - end.) It would be nice to be able to detect this state, so that the - Exim process is not held up unnecessarily. However, it seems that we - can't. The poll() function does not do the right thing, and in any case - it is not always available. - - NOTE 1: If ever this state of affairs changes, remember that we may be + /* NOTE 1: Remember that we may be dealing with stdin/stdout here, in addition to TCP/IP connections. Also, delays may be specified for non-SMTP input, where smtp_out and smtp_in will be NULL. Whatever is done must work in all cases. @@ -3122,41 +3392,75 @@ for (; cb != NULL; cb = cb->next) else { - if (smtp_out != NULL && !disable_delay_flush) mac_smtp_fflush(); + if (smtp_out && !f.disable_delay_flush) + mac_smtp_fflush(); + +#if !defined(NO_POLL_H) && defined (POLLRDHUP) + { + struct pollfd p; + nfds_t n = 0; + if (smtp_out) + { + p.fd = fileno(smtp_out); + p.events = POLLRDHUP; + n = 1; + } + if (poll(&p, n, delay*1000) > 0) + HDEBUG(D_acl) debug_printf_indent("delay cancelled by peer close\n"); + } +#else + /* Lacking POLLRDHUP it appears to be impossible to detect that a + TCP/IP connection has gone away without reading from it. This means + that we cannot shorten the delay below if the client goes away, + because we cannot discover that the client has closed its end of the + connection. (The connection is actually in a half-closed state, + waiting for the server to close its end.) It would be nice to be able + to detect this state, so that the Exim process is not held up + unnecessarily. However, it seems that we can't. The poll() function + does not do the right thing, and in any case it is not always + available. */ + while (delay > 0) delay = sleep(delay); +#endif } } } break; - #ifdef WITH_OLD_DEMIME - case ACLC_DEMIME: - rc = demime(&arg); - break; - #endif - #ifndef DISABLE_DKIM case ACLC_DKIM_SIGNER: - if (dkim_cur_signer != NULL) + if (dkim_cur_signer) rc = match_isinlist(dkim_cur_signer, &arg,0,NULL,NULL,MCL_STRING,TRUE,NULL); else - rc = FAIL; + rc = FAIL; break; case ACLC_DKIM_STATUS: - rc = match_isinlist(dkim_exim_expand_query(DKIM_VERIFY_STATUS), + rc = match_isinlist(dkim_verify_status, + &arg,0,NULL,NULL,MCL_STRING,TRUE,NULL); + break; + #endif + + #ifdef EXPERIMENTAL_DMARC + case ACLC_DMARC_STATUS: + if (!f.dmarc_has_been_checked) + dmarc_process(); + f.dmarc_has_been_checked = TRUE; + /* used long way of dmarc_exim_expand_query() in case we need more + * view into the process in the future. */ + rc = match_isinlist(dmarc_exim_expand_query(DMARC_VERIFY_STATUS), &arg,0,NULL,NULL,MCL_STRING,TRUE,NULL); break; #endif case ACLC_DNSLISTS: - rc = verify_check_dnsbl(&arg); + rc = verify_check_dnsbl(where, &arg, log_msgptr); break; case ACLC_DOMAINS: rc = match_isinlist(addr->domain, &arg, 0, &domainlist_anchor, - addr->domain_cache, MCL_DOMAIN, TRUE, &deliver_domain_data); + addr->domain_cache, MCL_DOMAIN, TRUE, CUSS &deliver_domain_data); break; /* The value in tls_cipher is the full cipher name, for example, @@ -3189,24 +3493,25 @@ for (; cb != NULL; cb = cb->next) case ACLC_HOSTS: rc = verify_check_this_host(&arg, sender_host_cache, NULL, - (sender_host_address == NULL)? US"" : sender_host_address, &host_data); - if (host_data != NULL) host_data = string_copy_malloc(host_data); + (sender_host_address == NULL)? US"" : sender_host_address, + CUSS &host_data); + if (rc == DEFER) *log_msgptr = search_error_message; + if (host_data) host_data = string_copy_malloc(host_data); break; case ACLC_LOCAL_PARTS: rc = match_isinlist(addr->cc_local_part, &arg, 0, &localpartlist_anchor, addr->localpart_cache, MCL_LOCALPART, TRUE, - &deliver_localpart_data); + CUSS &deliver_localpart_data); break; case ACLC_LOG_REJECT_TARGET: { int logbits = 0; int sep = 0; - uschar *s = arg; - uschar *ss; - while ((ss = string_nextinlist(&s, &sep, big_buffer, big_buffer_size)) - != NULL) + const uschar *s = arg; + uschar * ss; + while ((ss = string_nextinlist(&s, &sep, big_buffer, big_buffer_size))) { if (Ustrcmp(ss, "main") == 0) logbits |= LOG_MAIN; else if (Ustrcmp(ss, "panic") == 0) logbits |= LOG_PANIC; @@ -3225,7 +3530,7 @@ for (; cb != NULL; cb = cb->next) case ACLC_LOGWRITE: { int logbits = 0; - uschar *s = arg; + const uschar *s = arg; if (*s == ':') { s++; @@ -3249,28 +3554,35 @@ for (; cb != NULL; cb = cb->next) } while (isspace(*s)) s++; - if (logbits == 0) logbits = LOG_MAIN; log_write(0, logbits, "%s", string_printing(s)); } break; #ifdef WITH_CONTENT_SCAN - case ACLC_MALWARE: + case ACLC_MALWARE: /* Run the malware backend. */ { /* Separate the regular expression and any optional parameters. */ - uschar *ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size); - /* Run the malware backend. */ - rc = malware(&ss); - /* Modify return code based upon the existance of options. */ - while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)) - != NULL) { - if (strcmpic(ss, US"defer_ok") == 0 && rc == DEFER) - { - /* FAIL so that the message is passed to the next ACL */ - rc = FAIL; - } - } + const uschar * list = arg; + uschar * ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size); + uschar * opt; + BOOL defer_ok = FALSE; + int timeout = 0; + + while ((opt = string_nextinlist(&list, &sep, NULL, 0))) + if (strcmpic(opt, US"defer_ok") == 0) + defer_ok = TRUE; + else if ( strncmpic(opt, US"tmo=", 4) == 0 + && (timeout = readconf_readtime(opt+4, '\0', FALSE)) < 0 + ) + { + *log_msgptr = string_sprintf("bad timeout value in '%s'", opt); + return ERROR; + } + + rc = malware(ss, timeout); + if (rc == DEFER && defer_ok) + rc = FAIL; /* FAIL so that the message is passed to the next ACL */ } break; @@ -3279,13 +3591,23 @@ for (; cb != NULL; cb = cb->next) break; #endif + case ACLC_QUEUE: + if (Ustrchr(arg, '/')) + { + *log_msgptr = string_sprintf( + "Directory separator not permitted in queue name: '%s'", arg); + return ERROR; + } + queue_name = string_copy_malloc(arg); + break; + case ACLC_RATELIMIT: rc = acl_ratelimit(arg, where, log_msgptr); break; case ACLC_RECIPIENTS: - rc = match_address_list(addr->address, TRUE, TRUE, &arg, NULL, -1, 0, - &recipient_data); + rc = match_address_list(CUS addr->address, TRUE, TRUE, &arg, NULL, -1, 0, + CUSS &recipient_data); break; #ifdef WITH_CONTENT_SCAN @@ -3294,19 +3616,23 @@ for (; cb != NULL; cb = cb->next) break; #endif + case ACLC_REMOVE_HEADER: + setup_remove_header(arg); + break; + case ACLC_SENDER_DOMAINS: { uschar *sdomain; sdomain = Ustrrchr(sender_address, '@'); - sdomain = (sdomain == NULL)? US"" : sdomain + 1; + sdomain = sdomain ? sdomain + 1 : US""; rc = match_isinlist(sdomain, &arg, 0, &domainlist_anchor, sender_domain_cache, MCL_DOMAIN, TRUE, NULL); } break; case ACLC_SENDERS: - rc = match_address_list(sender_address, TRUE, TRUE, &arg, - sender_address_cache, -1, 0, &sender_data); + rc = match_address_list(CUS sender_address, TRUE, TRUE, &arg, + sender_address_cache, -1, 0, CUSS &sender_data); break; /* Connection variables must persist forever */ @@ -3314,40 +3640,55 @@ for (; cb != NULL; cb = cb->next) case ACLC_SET: { int old_pool = store_pool; - if (cb->u.varname[0] == 'c') store_pool = POOL_PERM; - acl_var_create(cb->u.varname)->data.ptr = string_copy(arg); + if ( cb->u.varname[0] == 'c' +#ifndef DISABLE_DKIM + || cb->u.varname[0] == 'd' +#endif +#ifndef DISABLE_EVENT + || event_name /* An event is being delivered */ +#endif + ) + store_pool = POOL_PERM; +#ifndef DISABLE_DKIM /* Overwriteable dkim result variables */ + if (Ustrcmp(cb->u.varname, "dkim_verify_status") == 0) + dkim_verify_status = string_copy(arg); + else if (Ustrcmp(cb->u.varname, "dkim_verify_reason") == 0) + dkim_verify_reason = string_copy(arg); + else +#endif + acl_var_create(cb->u.varname)->data.ptr = string_copy(arg); store_pool = old_pool; } break; - #ifdef WITH_CONTENT_SCAN +#ifdef WITH_CONTENT_SCAN case ACLC_SPAM: { - /* Seperate the regular expression and any optional parameters. */ - uschar *ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size); - /* Run the spam backend. */ - rc = spam(&ss); - /* Modify return code based upon the existance of options. */ - while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)) - != NULL) { + /* Separate the regular expression and any optional parameters. */ + const uschar * list = arg; + uschar *ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size); + + rc = spam(CUSS &ss); + /* Modify return code based upon the existence of options. */ + while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))) if (strcmpic(ss, US"defer_ok") == 0 && rc == DEFER) - { - /* FAIL so that the message is passed to the next ACL */ - rc = FAIL; - } - } + rc = FAIL; /* FAIL so that the message is passed to the next ACL */ } break; - #endif +#endif - #ifdef EXPERIMENTAL_SPF +#ifdef SUPPORT_SPF case ACLC_SPF: rc = spf_process(&arg, sender_address, SPF_PROCESS_NORMAL); break; case ACLC_SPF_GUESS: rc = spf_process(&arg, sender_address, SPF_PROCESS_GUESS); break; - #endif +#endif + + case ACLC_UDPSEND: + rc = acl_udpsend(arg, log_msgptr); + break; /* If the verb is WARN, discard any user message from verification, because such messages are SMTP responses, not header additions. The latter come @@ -3357,7 +3698,8 @@ for (; cb != NULL; cb = cb->next) case ACLC_VERIFY: rc = acl_verify(where, addr, arg, user_msgptr, log_msgptr, basic_errno); - acl_verify_message = *user_msgptr; + if (*user_msgptr) + acl_verify_message = *user_msgptr; if (verb == ACL_WARN) *user_msgptr = NULL; break; @@ -3369,11 +3711,9 @@ for (; cb != NULL; cb = cb->next) /* If a condition was negated, invert OK/FAIL. */ - if (!cond_modifiers[cb->type] && cb->u.negated) - { + if (!conditions[cb->type].is_modifier && cb->u.negated) if (rc == OK) rc = FAIL; - else if (rc == FAIL || rc == FAIL_DROP) rc = OK; - } + else if (rc == FAIL || rc == FAIL_DROP) rc = OK; if (rc != OK) break; /* Conditions loop */ } @@ -3397,7 +3737,7 @@ present. */ if (*epp && rc == OK) user_message = NULL; -if (((1< DENY - level the nesting level user_msgptr where to put a user error (for SMTP response) log_msgptr where to put a logging message (not for SMTP response) @@ -3592,7 +3931,7 @@ Returns: OK access is granted */ static int -acl_check_internal(int where, address_item *addr, uschar *s, int level, +acl_check_internal(int where, address_item *addr, uschar *s, uschar **user_msgptr, uschar **log_msgptr) { int fd = -1; @@ -3602,27 +3941,26 @@ uschar *ss; /* Catch configuration loops */ -if (level > 20) +if (acl_level > 20) { *log_msgptr = US"ACL nested too deep: possible loop"; return ERROR; } -if (s == NULL) +if (!s) { - HDEBUG(D_acl) debug_printf("ACL is NULL: implicit DENY\n"); + HDEBUG(D_acl) debug_printf_indent("ACL is NULL: implicit DENY\n"); return FAIL; } /* At top level, we expand the incoming string. At lower levels, it has already been expanded as part of condition processing. */ -if (level == 0) +if (acl_level == 0) { - ss = expand_string(s); - if (ss == NULL) + if (!(ss = expand_string(s))) { - if (expand_string_forcedfail) return OK; + if (f.expand_string_forcedfail) return OK; *log_msgptr = string_sprintf("failed to expand ACL string \"%s\": %s", s, expand_string_message); return ERROR; @@ -3630,7 +3968,7 @@ if (level == 0) } else ss = s; -while (isspace(*ss))ss++; +while (isspace(*ss)) ss++; /* If we can't find a named ACL, the default is to parse it as an inline one. (Unless it begins with a slash; non-existent files give rise to an error.) */ @@ -3651,11 +3989,11 @@ if (Ustrchr(ss, ' ') == NULL) acl = (acl_block *)(t->data.ptr); if (acl == NULL) { - HDEBUG(D_acl) debug_printf("ACL \"%s\" is empty: implicit DENY\n", ss); + HDEBUG(D_acl) debug_printf_indent("ACL \"%s\" is empty: implicit DENY\n", ss); return FAIL; } acl_name = string_sprintf("ACL \"%s\"", ss); - HDEBUG(D_acl) debug_printf("using ACL \"%s\"\n", ss); + HDEBUG(D_acl) debug_printf_indent("using ACL \"%s\"\n", ss); } else if (*ss == '/') @@ -3689,7 +4027,7 @@ if (Ustrchr(ss, ' ') == NULL) (void)close(fd); acl_name = string_sprintf("ACL \"%s\"", ss); - HDEBUG(D_acl) debug_printf("read ACL from file %s\n", ss); + HDEBUG(D_acl) debug_printf_indent("read ACL from file %s\n", ss); } } @@ -3697,13 +4035,13 @@ if (Ustrchr(ss, ' ') == NULL) in the ACL tree, having read it into the POOL_PERM store pool so that it persists between multiple messages. */ -if (acl == NULL) +if (!acl) { int old_pool = store_pool; if (fd >= 0) store_pool = POOL_PERM; acl = acl_read(acl_getline, log_msgptr); store_pool = old_pool; - if (acl == NULL && *log_msgptr != NULL) return ERROR; + if (!acl && *log_msgptr) return ERROR; if (fd >= 0) { tree_node *t = store_get_perm(sizeof(tree_node) + Ustrlen(ss)); @@ -3715,31 +4053,24 @@ if (acl == NULL) /* Now we have an ACL to use. It's possible it may be NULL. */ -while (acl != NULL) +while (acl) { int cond; int basic_errno = 0; BOOL endpass_seen = FALSE; + BOOL acl_quit_check = acl_level == 0 + && (where == ACL_WHERE_QUIT || where == ACL_WHERE_NOTQUIT); *log_msgptr = *user_msgptr = NULL; - acl_temp_details = FALSE; - - if ((where == ACL_WHERE_QUIT || where == ACL_WHERE_NOTQUIT) && - acl->verb != ACL_ACCEPT && - acl->verb != ACL_WARN) - { - *log_msgptr = string_sprintf("\"%s\" is not allowed in a QUIT or not-QUIT ACL", - verbs[acl->verb]); - return ERROR; - } + f.acl_temp_details = FALSE; - HDEBUG(D_acl) debug_printf("processing \"%s\"\n", verbs[acl->verb]); + HDEBUG(D_acl) debug_printf_indent("processing \"%s\"\n", verbs[acl->verb]); /* Clear out any search error message from a previous check before testing this condition. */ search_error_message = NULL; - cond = acl_check_condition(acl->verb, acl->condition, where, addr, level, + cond = acl_check_condition(acl->verb, acl->condition, where, addr, acl_level, &endpass_seen, user_msgptr, log_msgptr, &basic_errno); /* Handle special returns: DEFER causes a return except on a WARN verb; @@ -3748,44 +4079,42 @@ while (acl != NULL) switch (cond) { case DEFER: - HDEBUG(D_acl) debug_printf("%s: condition test deferred in %s\n", verbs[acl->verb], acl_name); + HDEBUG(D_acl) debug_printf_indent("%s: condition test deferred in %s\n", verbs[acl->verb], acl_name); if (basic_errno != ERRNO_CALLOUTDEFER) { if (search_error_message != NULL && *search_error_message != 0) *log_msgptr = search_error_message; - if (smtp_return_error_details) acl_temp_details = TRUE; + if (smtp_return_error_details) f.acl_temp_details = TRUE; } else - { - acl_temp_details = TRUE; - } + f.acl_temp_details = TRUE; if (acl->verb != ACL_WARN) return DEFER; break; default: /* Paranoia */ case ERROR: - HDEBUG(D_acl) debug_printf("%s: condition test error in %s\n", verbs[acl->verb], acl_name); + HDEBUG(D_acl) debug_printf_indent("%s: condition test error in %s\n", verbs[acl->verb], acl_name); return ERROR; case OK: - HDEBUG(D_acl) debug_printf("%s: condition test succeeded in %s\n", + HDEBUG(D_acl) debug_printf_indent("%s: condition test succeeded in %s\n", verbs[acl->verb], acl_name); break; case FAIL: - HDEBUG(D_acl) debug_printf("%s: condition test failed in %s\n", verbs[acl->verb], acl_name); + HDEBUG(D_acl) debug_printf_indent("%s: condition test failed in %s\n", verbs[acl->verb], acl_name); break; /* DISCARD and DROP can happen only from a nested ACL condition, and DISCARD can happen only for an "accept" or "discard" verb. */ case DISCARD: - HDEBUG(D_acl) debug_printf("%s: condition test yielded \"discard\" in %s\n", + HDEBUG(D_acl) debug_printf_indent("%s: condition test yielded \"discard\" in %s\n", verbs[acl->verb], acl_name); break; case FAIL_DROP: - HDEBUG(D_acl) debug_printf("%s: condition test yielded \"drop\" in %s\n", + HDEBUG(D_acl) debug_printf_indent("%s: condition test yielded \"drop\" in %s\n", verbs[acl->verb], acl_name); break; } @@ -3797,10 +4126,14 @@ while (acl != NULL) switch(acl->verb) { case ACL_ACCEPT: - if (cond == OK || cond == DISCARD) return cond; + if (cond == OK || cond == DISCARD) + { + HDEBUG(D_acl) debug_printf_indent("end of %s: ACCEPT\n", acl_name); + return cond; + } if (endpass_seen) { - HDEBUG(D_acl) debug_printf("accept: endpass encountered - denying access\n"); + HDEBUG(D_acl) debug_printf_indent("accept: endpass encountered - denying access\n"); return cond; } break; @@ -3808,36 +4141,58 @@ while (acl != NULL) case ACL_DEFER: if (cond == OK) { - acl_temp_details = TRUE; + HDEBUG(D_acl) debug_printf_indent("end of %s: DEFER\n", acl_name); + if (acl_quit_check) goto badquit; + f.acl_temp_details = TRUE; return DEFER; } break; case ACL_DENY: - if (cond == OK) return FAIL; + if (cond == OK) + { + HDEBUG(D_acl) debug_printf_indent("end of %s: DENY\n", acl_name); + if (acl_quit_check) goto badquit; + return FAIL; + } break; case ACL_DISCARD: - if (cond == OK || cond == DISCARD) return DISCARD; + if (cond == OK || cond == DISCARD) + { + HDEBUG(D_acl) debug_printf_indent("end of %s: DISCARD\n", acl_name); + if (acl_quit_check) goto badquit; + return DISCARD; + } if (endpass_seen) { - HDEBUG(D_acl) debug_printf("discard: endpass encountered - denying access\n"); + HDEBUG(D_acl) debug_printf_indent("discard: endpass encountered - denying access\n"); return cond; } break; case ACL_DROP: - if (cond == OK) return FAIL_DROP; + if (cond == OK) + { + HDEBUG(D_acl) debug_printf_indent("end of %s: DROP\n", acl_name); + if (acl_quit_check) goto badquit; + return FAIL_DROP; + } break; case ACL_REQUIRE: - if (cond != OK) return cond; + if (cond != OK) + { + HDEBUG(D_acl) debug_printf_indent("end of %s: not OK\n", acl_name); + if (acl_quit_check) goto badquit; + return cond; + } break; case ACL_WARN: if (cond == OK) acl_warn(where, *user_msgptr, *log_msgptr); - else if (cond == DEFER && (log_extra_selector & LX_acl_warn_skipped) != 0) + else if (cond == DEFER && LOGGING(acl_warn_skipped)) log_write(0, LOG_MAIN, "%s Warning: ACL \"warn\" statement skipped: " "condition test deferred%s%s", host_and_ident(TRUE), (*log_msgptr == NULL)? US"" : US": ", @@ -3858,15 +4213,113 @@ while (acl != NULL) /* We have reached the end of the ACL. This is an implicit DENY. */ -HDEBUG(D_acl) debug_printf("end of %s: implicit DENY\n", acl_name); +HDEBUG(D_acl) debug_printf_indent("end of %s: implicit DENY\n", acl_name); return FAIL; + +badquit: + *log_msgptr = string_sprintf("QUIT or not-QUIT toplevel ACL may not fail " + "('%s' verb used incorrectly)", verbs[acl->verb]); + return ERROR; +} + + + + +/* Same args as acl_check_internal() above, but the string s is +the name of an ACL followed optionally by up to 9 space-separated arguments. +The name and args are separately expanded. Args go into $acl_arg globals. */ +static int +acl_check_wargs(int where, address_item *addr, const uschar *s, + uschar **user_msgptr, uschar **log_msgptr) +{ +uschar * tmp; +uschar * tmp_arg[9]; /* must match acl_arg[] */ +uschar * sav_arg[9]; /* must match acl_arg[] */ +int sav_narg; +uschar * name; +int i; +int ret; + +if (!(tmp = string_dequote(&s)) || !(name = expand_string(tmp))) + goto bad; + +for (i = 0; i < 9; i++) + { + while (*s && isspace(*s)) s++; + if (!*s) break; + if (!(tmp = string_dequote(&s)) || !(tmp_arg[i] = expand_string(tmp))) + { + tmp = name; + goto bad; + } + } + +sav_narg = acl_narg; +acl_narg = i; +for (i = 0; i < acl_narg; i++) + { + sav_arg[i] = acl_arg[i]; + acl_arg[i] = tmp_arg[i]; + } +while (i < 9) + { + sav_arg[i] = acl_arg[i]; + acl_arg[i++] = NULL; + } + +acl_level++; +ret = acl_check_internal(where, addr, name, user_msgptr, log_msgptr); +acl_level--; + +acl_narg = sav_narg; +for (i = 0; i < 9; i++) acl_arg[i] = sav_arg[i]; +return ret; + +bad: +if (f.expand_string_forcedfail) return ERROR; +*log_msgptr = string_sprintf("failed to expand ACL string \"%s\": %s", + tmp, expand_string_message); +return f.search_find_defer ? DEFER : ERROR; } + /************************************************* * Check access using an ACL * *************************************************/ +/* Alternate interface for ACL, used by expansions */ +int +acl_eval(int where, uschar *s, uschar **user_msgptr, uschar **log_msgptr) +{ +address_item adb; +address_item *addr = NULL; +int rc; + +*user_msgptr = *log_msgptr = NULL; +sender_verified_failed = NULL; +ratelimiters_cmd = NULL; +log_reject_target = LOG_MAIN|LOG_REJECT; + +if (where == ACL_WHERE_RCPT) + { + adb = address_defaults; + addr = &adb; + addr->address = expand_string(US"$local_part@$domain"); + addr->domain = deliver_domain; + addr->local_part = deliver_localpart; + addr->cc_local_part = deliver_localpart; + addr->lc_local_part = deliver_localpart; + } + +acl_level++; +rc = acl_check_internal(where, addr, s, user_msgptr, log_msgptr); +acl_level--; +return rc; +} + + + /* This is the external interface for ACL checks. It sets up an address and the expansions for $domain and $local_part when called after RCPT, then calls acl_check_internal() to do the actual work. @@ -3885,6 +4338,7 @@ Returns: OK access is granted by an ACCEPT verb DEFER can't tell at the moment ERROR disaster */ +int acl_where = ACL_WHERE_UNKNOWN; int acl_check(int where, uschar *recipient, uschar *s, uschar **user_msgptr, @@ -3899,7 +4353,11 @@ sender_verified_failed = NULL; ratelimiters_cmd = NULL; log_reject_target = LOG_MAIN|LOG_REJECT; -if (where == ACL_WHERE_RCPT) +#ifndef DISABLE_PRDR +if (where==ACL_WHERE_RCPT || where==ACL_WHERE_VRFY || where==ACL_WHERE_PRDR) +#else +if (where==ACL_WHERE_RCPT || where==ACL_WHERE_VRFY) +#endif { adb = address_defaults; addr = &adb; @@ -3909,19 +4367,30 @@ if (where == ACL_WHERE_RCPT) *log_msgptr = US"defer in percent_hack_domains check"; return DEFER; } +#ifdef SUPPORT_I18N + if ((addr->prop.utf8_msg = message_smtputf8)) + { + addr->prop.utf8_downcvt = message_utf8_downconvert == 1; + addr->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1; + } +#endif deliver_domain = addr->domain; deliver_localpart = addr->local_part; } -rc = acl_check_internal(where, addr, s, 0, user_msgptr, log_msgptr); +acl_where = where; +acl_level = 0; +rc = acl_check_internal(where, addr, s, user_msgptr, log_msgptr); +acl_level = 0; +acl_where = ACL_WHERE_UNKNOWN; /* Cutthrough - if requested, and WHERE_RCPT and not yet opened conn as result of recipient-verify, and rcpt acl returned accept, and first recipient (cancel on any subsequents) open one now and run it up to RCPT acceptance. -A failed verify should cancel cutthrough request. - +A failed verify should cancel cutthrough request, +and will pass the fail to the originator. Initial implementation: dual-write to spool. Assume the rxd datastream is now being copied byte-for-byte to an open cutthrough connection. @@ -3935,32 +4404,68 @@ If temp-reject, close the conn (and keep the spooled copy). If conn-failure, no action (and keep the spooled copy). */ switch (where) -{ -case ACL_WHERE_RCPT: - if( rcpt_count > 1 ) - cancel_cutthrough_connection("more than one recipient"); - else if (rc == OK && cutthrough_delivery && cutthrough_fd < 0) - open_cutthrough_connection(addr); - break; + { + case ACL_WHERE_RCPT: +#ifndef DISABLE_PRDR + case ACL_WHERE_PRDR: +#endif -case ACL_WHERE_PREDATA: - if( rc == OK ) - cutthrough_predata(); - else - cancel_cutthrough_connection("predata acl not ok"); - break; + if (f.host_checking_callout) /* -bhc mode */ + cancel_cutthrough_connection(TRUE, US"host-checking mode"); -case ACL_WHERE_QUIT: -case ACL_WHERE_NOTQUIT: - cancel_cutthrough_connection("quit or notquit"); - break; + else if ( rc == OK + && cutthrough.delivery + && rcpt_count > cutthrough.nrcpt + ) + { + if ((rc = open_cutthrough_connection(addr)) == DEFER) + if (cutthrough.defer_pass) + { + uschar * s = addr->message; + /* Horrid kludge to recover target's SMTP message */ + while (*s) s++; + do --s; while (!isdigit(*s)); + if (*--s && isdigit(*s) && *--s && isdigit(*s)) *user_msgptr = s; + f.acl_temp_details = TRUE; + } + else + { + HDEBUG(D_acl) debug_printf_indent("cutthrough defer; will spool\n"); + rc = OK; + } + } + else HDEBUG(D_acl) if (cutthrough.delivery) + if (rcpt_count <= cutthrough.nrcpt) + debug_printf_indent("ignore cutthrough request; nonfirst message\n"); + else if (rc != OK) + debug_printf_indent("ignore cutthrough request; ACL did not accept\n"); + break; -default: - break; -} + case ACL_WHERE_PREDATA: + if (rc == OK) + cutthrough_predata(); + else + cancel_cutthrough_connection(TRUE, US"predata acl not ok"); + break; + + case ACL_WHERE_QUIT: + case ACL_WHERE_NOTQUIT: + /* Drop cutthrough conns, and drop heldopen verify conns if + the previous was not DATA */ + { + uschar prev = smtp_connection_had[smtp_ch_index-2]; + BOOL dropverify = !(prev == SCH_DATA || prev == SCH_BDAT); + + cancel_cutthrough_connection(dropverify, US"quit or conndrop"); + break; + } + + default: + break; + } deliver_domain = deliver_localpart = deliver_address_data = - sender_address_data = NULL; + deliver_domain_data = sender_address_data = NULL; /* A DISCARD response is permitted only for message ACLs, excluding the PREDATA ACL, which is really in the middle of an SMTP command. */ @@ -3996,7 +4501,6 @@ return rc; } - /************************************************* * Create ACL variable * *************************************************/ @@ -4011,12 +4515,10 @@ Returns the pointer to variable's tree node */ tree_node * -acl_var_create(uschar *name) +acl_var_create(uschar * name) { -tree_node *node, **root; -root = (name[0] == 'c')? &acl_var_c : &acl_var_m; -node = tree_search(*root, name); -if (node == NULL) +tree_node * node, ** root = name[0] == 'c' ? &acl_var_c : &acl_var_m; +if (!(node = tree_search(*root, name))) { node = store_get(sizeof(tree_node) + Ustrlen(name)); Ustrcpy(node->name, name); @@ -4055,4 +4557,6 @@ FILE *f = (FILE *)ctx; fprintf(f, "-acl%c %s %d\n%s\n", name[0], name+1, Ustrlen(value), value); } +/* vi: aw ai sw=2 +*/ /* End of acl.c */