static void verify_clnt_init(void)
{
if (vrfy_clnt != 0)
msg_panic("verify_clnt_init: multiple initialization");
vrfy_clnt = clnt_stream_create(MAIL_CLASS_PRIVATE, var_verify_service,
var_ipc_idle_limit, var_ipc_ttl_limit);
}
VSTRING *rewrite_clnt(const char *rule, const char *addr, VSTRING *result)
{
VSTREAM *stream;
int server_flags;
int count = 0;
/*
* One-entry cache.
*/
if (last_addr == 0) {
last_rule = vstring_alloc(10);
last_addr = vstring_alloc(100);
last_result = vstring_alloc(100);
}
/*
* Sanity check. An address must be in externalized form. The result must
* not clobber the input, because we may have to retransmit the query.
*/
#define STR vstring_str
if (*addr == 0)
addr = "";
if (addr == STR(result))
msg_panic("rewrite_clnt: result clobbers input");
/*
* Peek at the cache.
*/
if (time((time_t *) 0) < last_expire
&& strcmp(addr, STR(last_addr)) == 0
&& strcmp(rule, STR(last_rule)) == 0) {
vstring_strcpy(result, STR(last_result));
if (msg_verbose)
msg_info("rewrite_clnt: cached: %s: %s -> %s",
rule, addr, vstring_str(result));
return (result);
}
/*
* Keep trying until we get a complete response. The rewrite service is
* CPU bound and making the client asynchronous would just complicate the
* code.
*/
if (rewrite_clnt_stream == 0)
rewrite_clnt_stream = clnt_stream_create(MAIL_CLASS_PRIVATE,
var_rewrite_service,
var_ipc_idle_limit,
var_ipc_ttl_limit);
for (;;) {
stream = clnt_stream_access(rewrite_clnt_stream);
errno = 0;
count += 1;
if (attr_print(stream, ATTR_FLAG_NONE,
ATTR_TYPE_STR, MAIL_ATTR_REQ, REWRITE_ADDR,
ATTR_TYPE_STR, MAIL_ATTR_RULE, rule,
ATTR_TYPE_STR, MAIL_ATTR_ADDR, addr,
ATTR_TYPE_END) != 0
|| vstream_fflush(stream)
|| attr_scan(stream, ATTR_FLAG_STRICT,
ATTR_TYPE_INT, MAIL_ATTR_FLAGS, &server_flags,
ATTR_TYPE_STR, MAIL_ATTR_ADDR, result,
ATTR_TYPE_END) != 2) {
if (msg_verbose || count > 1 || (errno && errno != EPIPE && errno != ENOENT))
msg_warn("problem talking to service %s: %m",
var_rewrite_service);
} else {
if (msg_verbose)
msg_info("rewrite_clnt: %s: %s -> %s",
rule, addr, vstring_str(result));
/* Server-requested disconnect. */
if (server_flags != 0)
clnt_stream_recover(rewrite_clnt_stream);
break;
}
sleep(1); /* XXX make configurable */
clnt_stream_recover(rewrite_clnt_stream);
}
/*
* Update the cache.
*/
vstring_strcpy(last_rule, rule);
vstring_strcpy(last_addr, addr);
vstring_strcpy(last_result, STR(result));
last_expire = time((time_t *) 0) + 30; /* XXX make configurable */
return (result);
}
