int been_here_check(BH_TABLE *dup_filter, const char *fmt,...)
{
VSTRING *buf = vstring_alloc(100);
int status;
va_list ap;
/*
* Construct the string to be checked.
*/
va_start(ap, fmt);
vstring_vsprintf(buf, fmt, ap);
va_end(ap);
/*
* Do the duplicate check.
*/
status = been_here_check_fixed(dup_filter, vstring_str(buf));
/*
* Cleanup.
*/
vstring_free(buf);
return (status);
}
ARGV *cleanup_map1n_internal(CLEANUP_STATE *state, const char *addr,
MAPS *maps, int propagate)
{
ARGV *argv;
ARGV *lookup;
int count;
int i;
int arg;
BH_TABLE *been_here;
char *saved_lhs;
/*
* Initialize.
*/
argv = argv_alloc(1);
argv_add(argv, addr, ARGV_END);
argv_terminate(argv);
been_here = been_here_init(0, BH_FLAG_FOLD);
/*
* Rewrite the address vector in place. With each map lookup result,
* split it into separate addresses, then rewrite and flatten each
* address, and repeat the process. Beware: argv is being changed, so we
* must index the array explicitly, instead of running along it with a
* pointer.
*/
#define UPDATE(ptr,new) do { \
if (ptr) myfree(ptr); ptr = mystrdup(new); \
} while (0)
#define STR vstring_str
#define RETURN(x) do { \
been_here_free(been_here); return (x); \
} while (0)
#define UNEXPAND(argv, addr) do { \
argv_truncate((argv), 0); argv_add((argv), (addr), (char *) 0); \
} while (0)
for (arg = 0; arg < argv->argc; arg++) {
if (argv->argc > var_virt_expan_limit) {
msg_warn("%s: unreasonable %s map expansion size for %s -- "
"message not accepted, try again later",
state->queue_id, maps->title, addr);
state->errs |= CLEANUP_STAT_DEFER;
UPDATE(state->reason, "4.6.0 Alias expansion error");
UNEXPAND(argv, addr);
RETURN(argv);
}
for (count = 0; /* void */ ; count++) {
/*
* Don't expand an address that already expanded into itself.
*/
if (been_here_check_fixed(been_here, argv->argv[arg]) != 0)
break;
if (count >= var_virt_recur_limit) {
msg_warn("%s: unreasonable %s map nesting for %s -- "
"message not accepted, try again later",
state->queue_id, maps->title, addr);
state->errs |= CLEANUP_STAT_DEFER;
UPDATE(state->reason, "4.6.0 Alias expansion error");
UNEXPAND(argv, addr);
RETURN(argv);
}
quote_822_local(state->temp1, argv->argv[arg]);
if ((lookup = mail_addr_map(maps, STR(state->temp1), propagate)) != 0) {
saved_lhs = mystrdup(argv->argv[arg]);
for (i = 0; i < lookup->argc; i++) {
unquote_822_local(state->temp1, lookup->argv[i]);
if (i == 0) {
UPDATE(argv->argv[arg], STR(state->temp1));
} else {
argv_add(argv, STR(state->temp1), ARGV_END);
argv_terminate(argv);
}
/*
* Allow an address to expand into itself once.
*/
if (strcasecmp(saved_lhs, STR(state->temp1)) == 0)
been_here_fixed(been_here, saved_lhs);
}
myfree(saved_lhs);
argv_free(lookup);
} else if (maps->error != 0) {
msg_warn("%s: %s map lookup problem for %s -- "
"message not accepted, try again later",
state->queue_id, maps->title, addr);
state->errs |= CLEANUP_STAT_WRITE;
UPDATE(state->reason, "4.6.0 Alias expansion error");
UNEXPAND(argv, addr);
RETURN(argv);
} else {
break;
}
}
}
RETURN(argv);
}
