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Diffstat (limited to 'src/rewrite.c')
| -rw-r--r-- | src/rewrite.c | 841 |
1 files changed, 841 insertions, 0 deletions
diff --git a/src/rewrite.c b/src/rewrite.c new file mode 100644 index 0000000..f720f99 --- /dev/null +++ b/src/rewrite.c @@ -0,0 +1,841 @@ +/************************************************* +* Exim - an Internet mail transport agent * +*************************************************/ + +/* Copyright (c) University of Cambridge 1995 - 2018 */ +/* See the file NOTICE for conditions of use and distribution. */ + +/* Functions concerned with rewriting headers */ + + +#include "exim.h" + +/* Names for testing rewriting */ + +static const char *rrname[] = { + " sender", + " from", + " to", + " cc", + " bcc", + "reply-to", + "env-from", + " env-to" +}; + +/* Structure and table for finding source of address for debug printing */ + +typedef struct where_list_block { + int bit; + const uschar *string; +} where_list_block; + +static where_list_block where_list[] = { + { rewrite_sender, CUS"sender:" }, + { rewrite_from, CUS"from:" }, + { rewrite_to, CUS"to:" }, + { rewrite_cc, CUS"cc:" }, + { rewrite_bcc, CUS"bcc:" }, + { rewrite_replyto, CUS"reply-to:" }, + { rewrite_envfrom, CUS"env-from" }, + { rewrite_envto, CUS"env-to" }, + { rewrite_smtp, CUS"smtp recipient" }, + { rewrite_smtp|rewrite_smtp_sender, CUS"smtp sender" } +}; + +static int where_list_size = sizeof(where_list)/sizeof(where_list_block); + + + +/************************************************* +* Ensure an address is qualified * +*************************************************/ + +/* +Arguments: + s address to check + is_recipient TRUE if a recipient address; FALSE if a sender address + +Returns: fully-qualified address +*/ + +const uschar * +rewrite_address_qualify(const uschar *s, BOOL is_recipient) +{ +return parse_find_at(s) + ? s : string_sprintf("%s@%s", s, + is_recipient ? qualify_domain_recipient : qualify_domain_sender); +} + + + +/************************************************* +* Rewrite a single address * +*************************************************/ + +/* The yield is the input address if there is no rewriting to be done. Assume +the input is a valid address, except in the case of SMTP-time rewriting, which +is handled specially. When this function is called while processing filter and +forward files, the uid may be that of the user. Ensure it is reset while +expanding a replacement, in case that involves file lookups. + +Arguments: + s address to rewrite + flag indicates where this address comes from; it must match the + flags in the rewriting rule + whole if not NULL, set TRUE if any rewriting rule contained the + "whole" bit and it is a header that is being rewritten + add_header if TRUE and rewriting occurs, add an "X-rewrote-xxx" header + if headers are in existence; this should be TRUE only when + a message is being received, not during delivery + name name of header, for use when adding X-rewrote-xxxx + rewrite_rules chain of rewriting rules + +Returns: new address if rewritten; the input address if no change; + for a header rewrite, if the "whole" bit is set, the entire + rewritten address is returned, not just the active bit. +*/ + +const uschar * +rewrite_one(const uschar *s, int flag, BOOL *whole, BOOL add_header, uschar *name, + rewrite_rule *rewrite_rules) +{ +const uschar *yield = s; +const uschar *subject = s; +uschar *domain = NULL; +BOOL done = FALSE; +int rule_number = 1; +int yield_start = 0, yield_end = 0; + +if (whole) *whole = FALSE; + +/* Scan the rewriting rules */ + +for (rewrite_rule * rule = rewrite_rules; + rule && !done; + rule_number++, rule = rule->next) + { + int start, end, pdomain; + int count = 0; + uschar *save_localpart; + const uschar *save_domain; + uschar *error, *new; + const uschar * newparsed; + + /* Ensure that the flag matches the flags in the rule. */ + + if (!(rule->flags & flag)) continue; + + /* Come back here for a repeat after a successful rewrite. We do this + only so many times. */ + + REPEAT_RULE: + + /* If this is an SMTP-time rewrite, the pattern must be a regex and + the subject may have any structure. No local part or domain variables + can be set for the expansion. We expand the pattern in order to be consistent + with the other kinds of rewrite, where expansion happens inside + match_address_list(). */ + + if (flag & rewrite_smtp) + { + uschar *key = expand_string(rule->key); + if (!key) + { + if (!f.expand_string_forcedfail) + log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand \"%s\" while " + "checking for SMTP rewriting: %s", rule->key, expand_string_message); + continue; + } + if (match_check_string(subject, key, 0, TRUE, FALSE, FALSE, NULL) != OK) + continue; + new = expand_string(rule->replacement); + } + + /* All other rewrites expect the input to be a valid address, so local part + and domain variables can be set for expansion. For the first rule, to be + applied to this address, domain will be NULL and needs to be set. */ + + else + { + if (!domain) domain = Ustrrchr(subject, '@') + 1; + + /* Use the general function for matching an address against a list (here + just one item, so use the "impossible value" separator UCHAR_MAX+1). */ + + if (match_address_list(subject, FALSE, TRUE, CUSS &(rule->key), NULL, 0, + UCHAR_MAX + 1, NULL) != OK) + continue; + + /* The source address matches, and numerical variables have been + set up. If the replacement string consists of precisely "*" then no + rewriting is required for this address - the behaviour is as for "fail" + in the replacement expansion, but assuming the quit flag. */ + + if (Ustrcmp(rule->replacement, "*") == 0) break; + + /* Otherwise, expand the replacement string. Set $local_part and $domain to + the appropriate values, restoring whatever value they previously had + afterwards. */ + + save_localpart = deliver_localpart; + save_domain = deliver_domain; + + /* We have subject pointing to "localpart@domain" and domain pointing to + the domain. Temporarily terminate the local part so that it can be + set up as an expansion variable */ + + domain[-1] = 0; + deliver_localpart = US subject; + deliver_domain = domain; + + new = expand_string(rule->replacement); + + domain[-1] = '@'; + deliver_localpart = save_localpart; + deliver_domain = save_domain; + } + + /* If the expansion failed with the "forcedfail" flag, don't generate + an error - just give up on this rewriting rule. If the "q" flag is set, + give up altogether. For other expansion failures we have a configuration + error. */ + + if (!new) + { + if (f.expand_string_forcedfail) + { if (rule->flags & rewrite_quit) break; else continue; } + + expand_string_message = expand_hide_passwords(expand_string_message); + + log_write(0, LOG_MAIN|LOG_PANIC, "Expansion of %s failed while rewriting: " + "%s", rule->replacement, expand_string_message); + break; + } + + /* Check the what has been generated is a valid RFC 2822 address. Only + envelope from or SMTP sender is permitted to be rewritten as <>.*/ + + newparsed = parse_extract_address(new, &error, &start, &end, &pdomain, + flag == rewrite_envfrom || flag == (rewrite_smtp|rewrite_smtp_sender)); + + if (!newparsed) + { + log_write(0, LOG_MAIN|LOG_PANIC, "Rewrite of %s yielded unparseable " + "address: %s in address %s", subject, error, new); + break; /* Give up on this address */ + } + + /* A non-null unqualified address can be qualified if requested. Otherwise, + this is an error unless it's the empty address in circumstances where that is + permitted. */ + + if (pdomain == 0 && (*newparsed != 0 || + (flag != rewrite_envfrom && flag != (rewrite_smtp|rewrite_smtp_sender)))) + { + if (rule->flags & rewrite_qualify) + { + newparsed = rewrite_address_qualify(newparsed, TRUE); + new = string_sprintf("%.*s%s%.*s", start, new, newparsed, + Ustrlen(new) - end, new + end); + end = start + Ustrlen(newparsed); + } + else + { + log_write(0, LOG_MAIN|LOG_PANIC, "Rewrite of %s yielded unqualified " + "address \"%s\"", subject, new); + break; /* Give up on this address */ + } + } + + /* We have a validly rewritten address */ + + if (LOGGING(address_rewrite) || (debug_selector & D_rewrite) != 0) + { + const uschar *where = CUS"?"; + + for (int i = 0; i < where_list_size; i++) + if (flag == where_list[i].bit) + { + where = where_list[i].string; + break; + } + log_write(L_address_rewrite, + LOG_MAIN, "\"%s\" from %s rewritten as \"%s\" by rule %d", + yield, where, new, rule_number); + } + + /* A header will only actually be added if header_last is non-NULL, + i.e. during message reception or delivery, but add_header should not + be set TRUE during delivery, as otherwise multiple instances of the header + can fill up the -H file and make it embarrassingly large. We don't need + to set header_rewritten because the -H file always gets written at the end + of message reception. */ + + if (add_header) + header_add(htype_old, "X-rewrote-%s: %s\n", name, subject); + + /* Handle the case when replacement of the whole address is possible. + This happens only when whole is not NULL and we are rewriting a header. + If *whole is already TRUE it means that a previous rule had the w + flag set and so we must preserve the non-active portion of the current + subject unless the current rule also has the w flag set. */ + + if (whole && (flag & rewrite_all_headers)) + { + /* Current rule has the w flag set. We must ensure the phrase parts + are syntactically valid if they are present. */ + + if (rule->flags & rewrite_whole) + { + if (start > 0 && new[start-1] == '<') + { + uschar *p1 = new + start - 1; + uschar *p2 = new + end + 1; + const uschar *pf1, *pf2; + + while (p1 > new && p1[-1] == ' ') p1--; + pf1 = parse_fix_phrase(new, p1 - new); + while (*p2 == ' ') p2++; + pf2 = parse_fix_phrase(p2, Ustrlen(p2)); + + start = Ustrlen(pf1) + start + new - p1; + end = start + Ustrlen(newparsed); + new = string_sprintf("%s%.*s%s", pf1, (int)(p2 - p1), p1, pf2); + } + + /* Now accept the whole thing */ + + yield = new; + yield_start = start; + yield_end = end; + subject = newparsed; + *whole = TRUE; + } + + /* Current rule does not have the w flag set; if not previously + done any whole rewriting, behave in non-whole manner. */ + + else if (!*whole) goto NEVER_WHOLE; + + /* Current rule does not have the w flag set, but a previous + rule did rewrite the whole address. Thus yield and subject will be + different. Preserve the previous non-active part of the address. */ + + else + { + subject = newparsed; + new = string_sprintf("%.*s%s%n%s", + yield_start, yield, subject, &end, yield + yield_end); + yield_end = end; + yield = new; + } + } + + /* Rule just rewrites active part, or handling an envelope. This + code is obeyed only when all rules so far have not done "whole" + replacement. */ + + else + { + NEVER_WHOLE: + subject = yield = newparsed; + } + + domain = NULL; /* Reset for next rule */ + + /* If no further rewrites are to be done, set the done flag. This allows + repeats of the current rule if configured before breaking the loop. */ + + if (rule->flags & rewrite_quit) done = TRUE; + + /* Allow the current rule to be applied up to 10 times if + requested. */ + + if (rule->flags & rewrite_repeat) + { + if (count++ < 10) goto REPEAT_RULE; + log_write(0, LOG_MAIN|LOG_PANIC, "rewrite rule repeat ignored after 10 " + "times"); + } + } + +/* Unset expansion numeric variables, and that's it. */ + +expand_nmax = -1; +return yield; +} + + + +/************************************************* +* Ensure qualification and rewrite * +*************************************************/ + +/* This function is called for envelope addresses, the boolean specifying +whether a recipient or a sender. It must first of all ensure the address is +fully qualified, and then apply any relevant re-writing rules. The add-header +flag causes a header to be added, recording the old address. This is marked +"old", so that it is never transported anywhere; it exists for local checking +and debugging purposes. + +Arguments: + s the address to be considered + is_recipient TRUE for recipient addresses; FALSE otherwise + add_header add "X-rewrote-xxx" header when rewriting; this is + set TRUE only for calls from the reception functions + rewrite_rules points to chain of rewrite rules + existflags bits indicating which headers there are rewrites for + (just an optimisation) + +Returns: possibly rewritten address +*/ + +const uschar * +rewrite_address(const uschar *s, BOOL is_recipient, BOOL add_header, + rewrite_rule *rewrite_rules, int existflags) +{ +int flag = is_recipient ? rewrite_envto : rewrite_envfrom; + +s = rewrite_address_qualify(s, is_recipient); +if (existflags & flag) + { + const uschar *new = rewrite_one(s, flag, NULL, add_header, is_recipient? + US"original-recipient" : US"sender", rewrite_rules); + if (new != s) s = new; + } +return s; +} + + + +/************************************************* +* Qualify and possibly rewrite one header * +*************************************************/ + +/* This is called only from rewrite_header() below, either when reading a +message. or when routing, in order to rewrite addresses that get changed by a +router. This is normally the addition of full qualification to a partial +domain. The first rewriting rule in this case is "change routed_old into +routed_new", and it applies to all header lines that contain addresses. Then +header-specific rewriting rules are applied. + +Before rewriting can be done, addresses without domains have to be qualified. +This should only be done for messages from "local" senders. This is a difficult +concept to pin down, what with the use of SMTP both as a submission and as a +transmission protocol. Exim normally requires incoming SMTP to contain fully- +qualified addresses, but there are options to permit unqualified ones from +certain hosts. For those hosts only, addresses in headers can also be +qualified. For other hosts, unqualified addresses in headers do not get touched +in any way. For locally sourced messages, unqualified addresses always get +qualified, except when -bnq is used to explicitly suppress this. + +Arguments: + h pointer to header line block + flag indicates which header this is + routed_old if not NULL, this is a rewrite caused by a router, changing + this domain into routed_new + routed_new new routed domain if routed_old is not NULL + rewrite_rules points to chain of rewriting rules + existflags bits indicating which rewrites exist + replace if TRUE, insert the new header in the chain after the old + one, and mark the old one "replaced" + +Returns: NULL if header unchanged; otherwise the rewritten header +*/ + +static header_line * +rewrite_one_header(header_line *h, int flag, + const uschar *routed_old, const uschar *routed_new, + rewrite_rule *rewrite_rules, int existflags, BOOL replace) +{ +int lastnewline = 0; +header_line *newh = NULL; +rmark function_reset_point = store_mark(); +uschar *s = Ustrchr(h->text, ':') + 1; +while (isspace(*s)) s++; + +DEBUG(D_rewrite) + debug_printf("rewrite_one_header: type=%c:\n %s", h->type, h->text); + +f.parse_allow_group = TRUE; /* Allow group syntax */ + +/* Loop for multiple addresses in the header. We have to go through them all +in case any need qualifying, even if there's no rewriting. Pathological headers +may have thousands of addresses in them, so cause the store to be reset for +any that don't actually get rewritten. We also play silly games for those that +_are_ rewritten so as to avoid runaway store usage for these kinds of header. +We want to avoid keeping store for any intermediate versions. */ + +while (*s) + { + uschar *sprev; + uschar *ss = parse_find_address_end(s, FALSE); + uschar *recipient, *new; + rmark loop_reset_point = store_mark(); + uschar *errmess = NULL; + BOOL changed = FALSE; + int terminator = *ss; + int start, end, domain; + + /* Temporarily terminate the string at this point, and extract the + operative address within. Then put back the terminator and prepare for + the next address, saving the start of the old one. */ + + *ss = 0; + recipient = parse_extract_address(s,&errmess,&start,&end,&domain,FALSE); + + *ss = terminator; + sprev = s; + s = ss + (terminator? 1:0); + while (isspace(*s)) s++; + + /* There isn't much we can do for syntactic disasters at this stage. + Pro tem (possibly for ever) ignore them. + If we got nothing, then there was any sort of error: non-parsable address, + empty address, overlong addres. Sometimes the result matters, sometimes not. + It seems this function is called for *any* header we see. */ + + + if (!recipient) + { +#if 0 + /* FIXME: + This was(!) an attempt tho handle empty rewrits, but seemingly it + needs more effort to decide if the returned empty address matters. + Now this will now break test 471 again. + + 471 fails now because it uses an overlong address, for wich parse_extract_address() + returns an empty address (which was not expected). + + Checking the output and exit if rewrite_rules or routed_old are present + isn't a good idea either: It's enough to have *any* rewrite rule + in the configuration plus "To: undisclosed recpients:;" to exit(), which + is not what we want. + */ + + if (rewrite_rules || routed_old) + { + log_write(0, LOG_MAIN, "rewrite: %s", errmess); + exim_exit(EXIT_FAILURE); + } +#endif + loop_reset_point = store_reset(loop_reset_point); + continue; + } + + /* If routed_old is not NULL, this is a rewrite caused by a router, + consisting of changing routed_old into routed_new, and applying to all + headers. If the header address has no domain, it is excluded, since a router + rewrite affects domains only. The new value should always be fully qualified, + but it may be something that has an explicit re-write rule set, so we need to + check the configured rules subsequently as well. (Example: there's an + explicit rewrite turning *.foo.com into foo.com, and an address is supplied + as abc@xyz, which the DNS lookup turns into abc@xyz.foo.com). However, if no + change is made here, don't bother carrying on. */ + + if (routed_old != NULL) + { + if (domain <= 0 || strcmpic(recipient+domain, routed_old) != 0) continue; + recipient[domain-1] = 0; + new = string_sprintf("%s@%s", recipient, routed_new); + DEBUG(D_rewrite) + { + recipient[domain-1] = '@'; + debug_printf("%s rewritten by router as %s\n", recipient, new); + } + recipient = new; + changed = TRUE; + } + + /* This is not a router-inspired rewrite. Ensure the address is fully + qualified if that is permitted. If an unqualified address was received + from a host that isn't listed, do not continue rewriting this address. + Sender, From or Reply-To headers are treated as senders, the rest as + recipients. This matters only when there are different qualify strings. */ + + else + { + BOOL is_recipient = + (flag & (rewrite_sender | rewrite_from | rewrite_replyto)) == 0; + /* deconst ok as recipient was notconst */ + new = US rewrite_address_qualify(recipient, is_recipient); + changed = (new != recipient); + recipient = new; + + /* Can only qualify if permitted; if not, no rewrite. */ + + if (changed && ((is_recipient && !f.allow_unqualified_recipient) || + (!is_recipient && !f.allow_unqualified_sender))) + { + loop_reset_point = store_reset(loop_reset_point); + continue; + } + } + + /* If there are rewrite rules for this type of header, apply + them. This test is just for efficiency, to save scanning the rules + in cases when nothing is going to change. If any rewrite rule had the + "whole" flag set, adjust the pointers so that the whole address gets + replaced, except possibly a final \n. */ + + if ((existflags & flag) != 0) + { + BOOL whole; + /* deconst ok as recipient was notconst */ + new = US rewrite_one(recipient, flag, &whole, FALSE, NULL, rewrite_rules); + if (new != recipient) + { + changed = TRUE; + if (whole) + { + start = 0; + end = ss - sprev; + if (sprev[end-1] == '\n') end--; + } + } + } + + /* If nothing has changed, lose all dynamic store obtained in this loop, and + move on to the next address. We can't reset to the function start store + point, because we may have a rewritten line from a previous time round the + loop. */ + + if (!changed) loop_reset_point = store_reset(loop_reset_point); + + /* If the address has changed, create a new header containing the + rewritten address. We do not need to set the chain pointers at this + stage. We want to avoid using more and more memory if the header is very long + and contains lots and lots of rewritten addresses. Therefore, we build the + new text string in malloc store, then at the end we reset dynamic store + before copying the new header to a new block (and then freeing the malloc + block). The header must end up in dynamic store so that it's freed at the end + of receiving a message. */ + + else + { + int remlen; + int newlen = Ustrlen(new); + int oldlen = end - start; + + header_line * prev = newh ? newh : h; + uschar * newt = store_get_perm(prev->slen - oldlen + newlen + 4, TRUE); + uschar * newtstart = newt; + + int type = prev->type; + int slen = prev->slen - oldlen + newlen; + + /* Build the new header text by copying the old and putting in the + replacement. This process may make the header substantially longer + than it was before - qualification of a list of bare addresses can + often do this - so we stick in a newline after the re-written address + if it has increased in length and ends more than 40 characters in. In + fact, the code is not perfect, since it does not scan for existing + newlines in the header, but it doesn't seem worth going to that + amount of trouble. */ + + Ustrncpy(newt, prev->text, sprev - prev->text + start); + newt += sprev - prev->text + start; + *newt = 0; + Ustrcat(newt, new); + newt += newlen; + remlen = s - (sprev + end); + if (remlen > 0) + { + Ustrncpy(newt, sprev + end, remlen); + newt += remlen; + *newt = 0; + } + + /* Must check that there isn't a newline here anyway; in particular, there + will be one at the very end of the header, where we DON'T want to insert + another one! The pointer s has been skipped over white space, so just + look back to see if the last non-space-or-tab was a newline. */ + + if (newlen > oldlen && newt - newtstart - lastnewline > 40) + { + uschar *p = s - 1; + while (p >= prev->text && (*p == ' ' || *p == '\t')) p--; + if (*p != '\n') + { + lastnewline = newt - newtstart; + Ustrcat(newt, US"\n\t"); + slen += 2; + } + } + + /* Finally, the remaining unprocessed addresses, if any. */ + + Ustrcat(newt, s); + + DEBUG(D_rewrite) debug_printf("newlen=%d newtype=%c newtext:\n%s", + slen, type, newtstart); + + /* Compute the length of the rest of the header line before we possibly + flatten a previously rewritten copy. */ + + remlen = (s - prev->text) - oldlen + newlen; + + /* We have the new text in a malloc block. That enables us to release all + the memory that has been used, back to the point at which the function was + entered. Then set up a new header in dynamic store. This will override a + rewritten copy from a previous time round this loop. */ + + store_reset(function_reset_point); + function_reset_point = store_mark(); + newh = store_get(sizeof(header_line), FALSE); + newh->type = type; + newh->slen = slen; + newh->text = string_copyn(newtstart, slen); + + /* Set up for scanning the rest of the header */ + + s = newh->text + remlen; + DEBUG(D_rewrite) debug_printf("remainder: %s", (*s == 0)? US"\n" : s); + } + } + +f.parse_allow_group = FALSE; /* Reset group flags */ +f.parse_found_group = FALSE; + +/* If a rewrite happened and "replace" is true, put the new header into the +chain following the old one, and mark the old one as replaced. */ + +if (newh != NULL && replace) + { + newh->next = h->next; + if (newh->next == NULL) header_last = newh; + h->type = htype_old; + h->next = newh; + } + +return newh; +} + + + + +/************************************************* +* Rewrite a header line * +*************************************************/ + +/* This function may be passed any old header line. It must detect those which +contain addresses, then then apply any rewriting rules that apply. If +routed_old is NULL, only the configured rewriting rules are consulted. +Otherwise, the rewriting rule is "change routed_old into routed_new", and it +applies to all header lines that contain addresses. Then header-specific +rewriting rules are applied. + +The old header line is flagged as "old". Old headers are saved on the spool for +debugging but are never sent to any recipients. + +Arguments: + h header line to rewrite + routed_old if not NULL, this is a rewrite caused by a router, changing + this domain into routed_new + routed_new new routed domain if routed_old is not NULL + rewrite_rules points to chain of rewrite rules + existflags bits indicating which rewrites exist + replace if TRUE, the new header is inserted into the header chain + after the old one, and the old one is marked replaced + +Returns: NULL if header unchanged; otherwise the rewritten header +*/ + +header_line * +rewrite_header(header_line *h, + const uschar *routed_old, const uschar *routed_new, + rewrite_rule *rewrite_rules, int existflags, BOOL replace) +{ +int flag; +switch (h->type) + { + case htype_sender: flag = rewrite_sender; break; + case htype_from: flag = rewrite_from; break; + case htype_to: flag = rewrite_to; break; + case htype_cc: flag = rewrite_cc; break; + case htype_bcc: flag = rewrite_bcc; break; + case htype_reply_to: flag = rewrite_replyto; break; + default: return NULL; + } +return rewrite_one_header(h, flag, routed_old, routed_new, + rewrite_rules, existflags, replace); +} + + + +/************************************************ +* Test rewriting rules * +************************************************/ + +/* Called from the mainline as a result of the -brw option. Test the +address for all possible cases. + +Argument: the address to test +Returns: nothing +*/ + +void +rewrite_test(const uschar *s) +{ +uschar *recipient, *error; +int start, end, domain; +BOOL done_smtp = FALSE; + +if (rewrite_existflags == 0) + { + printf("No rewrite rules are defined\n"); + return; + } + +/* Do SMTP rewrite only if a rule with the S flag exists. Allow <> by +pretending it is a sender. */ + +if ((rewrite_existflags & rewrite_smtp) != 0) + { + const uschar * new = rewrite_one(s, rewrite_smtp|rewrite_smtp_sender, NULL, + FALSE, US"", global_rewrite_rules); + if (new != s) + { + if (*new == 0) + printf(" SMTP: <>\n"); + else + printf(" SMTP: %s\n", new); + done_smtp = TRUE; + } + } + +/* Do the other rewrites only if a rule without the S flag exists */ + +if ((rewrite_existflags & ~rewrite_smtp) == 0) return; + +/* Qualify if necessary before extracting the address */ + +if (parse_find_at(s) == NULL) + s = string_sprintf("%s@%s", s, qualify_domain_recipient); + +recipient = parse_extract_address(s, &error, &start, &end, &domain, FALSE); + +if (!recipient) + { + if (!done_smtp) + printf("Syntax error in %s\n%c%s\n", s, toupper(error[0]), error+1); + return; + } + +for (int i = 0; i < 8; i++) + { + BOOL whole = FALSE; + int flag = 1 << i; + const uschar * new = rewrite_one(recipient, flag, &whole, FALSE, US"", + global_rewrite_rules); + printf("%s: ", rrname[i]); + if (*new == 0) + printf("<>\n"); + else if (whole || (flag & rewrite_all_headers) == 0) + printf("%s\n", CS new); + else printf("%.*s%s%s\n", start, s, new, s+end); + } +} + +/* End of rewrite.c */ |