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|
/*++
/* NAME
/* verify_clnt 3
/* SUMMARY
/* address verification client interface
/* SYNOPSIS
/* #include <verify_clnt.h>
/*
/* int verify_clnt_query(addr, status, why)
/* const char *addr;
/* int *status;
/* VSTRING *why;
/*
/* int verify_clnt_update(addr, status, why)
/* const char *addr;
/* int status;
/* const char *why;
/* DESCRIPTION
/* verify_clnt_query() requests information about the given address.
/* The result value is one of the valid status values (see
/* status description below).
/* In all cases the \fBwhy\fR argument provides additional
/* information.
/*
/* verify_clnt_update() requests that the status of the specified
/* address be updated. The result status is DEL_REQ_RCPT_STAT_OK upon
/* success, DEL_REQ_RCPT_STAT_DEFER upon failure.
/*
/* Arguments
/* .IP addr
/* The email address in question.
/* .IP status
/* One of the following status codes:
/* .RS
/* .IP DEL_REQ_RCPT_STAT_OK
/* The mail system did not detect any problems.
/* .IP DEL_REQ_RCPT_STAT_DEFER
/* The status of the address is indeterminate.
/* .IP DEL_REQ_RCPT_STAT_BOUNCE
/* The address is permanently undeliverable.
/* .RE
/* .IP why
/* textual description of the status.
/* DIAGNOSTICS
/* These functions return VRFY_STAT_OK in case of success,
/* VRFY_STAT_BAD in case of a malformed request, and
/* VRFY_STAT_FAIL when the operation failed.
/* SEE ALSO
/* verify(8) Postfix address verification server
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <unistd.h>
#include <errno.h>
/* Utility library. */
#include <msg.h>
#include <vstream.h>
#include <vstring.h>
#include <attr.h>
/* Global library. */
#include <mail_params.h>
#include <mail_proto.h>
#include <clnt_stream.h>
#include <verify_clnt.h>
CLNT_STREAM *vrfy_clnt;
/* verify_clnt_handshake - receive server protocol announcement */
static int verify_clnt_handshake(VSTREAM *stream)
{
return (attr_scan(stream, ATTR_FLAG_STRICT,
RECV_ATTR_STREQ(MAIL_ATTR_PROTO, MAIL_ATTR_PROTO_VERIFY),
ATTR_TYPE_END));
}
/* verify_clnt_init - initialize */
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,
verify_clnt_handshake);
}
/* verify_clnt_query - request address verification status */
int verify_clnt_query(const char *addr, int *addr_status, VSTRING *why)
{
VSTREAM *stream;
int request_status;
int count = 0;
/*
* Do client-server plumbing.
*/
if (vrfy_clnt == 0)
verify_clnt_init();
/*
* Request status for this address.
*/
for (;;) {
stream = clnt_stream_access(vrfy_clnt);
errno = 0;
count += 1;
if (stream == 0
|| attr_print(stream, ATTR_FLAG_NONE,
SEND_ATTR_STR(MAIL_ATTR_REQ, VRFY_REQ_QUERY),
SEND_ATTR_STR(MAIL_ATTR_ADDR, addr),
ATTR_TYPE_END) != 0
|| vstream_fflush(stream)
|| attr_scan(stream, ATTR_FLAG_MISSING,
RECV_ATTR_INT(MAIL_ATTR_STATUS, &request_status),
RECV_ATTR_INT(MAIL_ATTR_ADDR_STATUS, addr_status),
RECV_ATTR_STR(MAIL_ATTR_WHY, why),
ATTR_TYPE_END) != 3) {
if (msg_verbose || count > 1 || (errno && errno != EPIPE && errno != ENOENT))
msg_warn("problem talking to service %s: %m",
var_verify_service);
} else {
break;
}
sleep(1);
clnt_stream_recover(vrfy_clnt);
}
return (request_status);
}
/* verify_clnt_update - request address status update */
int verify_clnt_update(const char *addr, int addr_status, const char *why)
{
VSTREAM *stream;
int request_status;
/*
* Do client-server plumbing.
*/
if (vrfy_clnt == 0)
verify_clnt_init();
/*
* Send status for this address. Supply a default status if the address
* verification service is unavailable.
*/
for (;;) {
stream = clnt_stream_access(vrfy_clnt);
errno = 0;
if (stream == 0
|| attr_print(stream, ATTR_FLAG_NONE,
SEND_ATTR_STR(MAIL_ATTR_REQ, VRFY_REQ_UPDATE),
SEND_ATTR_STR(MAIL_ATTR_ADDR, addr),
SEND_ATTR_INT(MAIL_ATTR_ADDR_STATUS, addr_status),
SEND_ATTR_STR(MAIL_ATTR_WHY, why),
ATTR_TYPE_END) != 0
|| attr_scan(stream, ATTR_FLAG_MISSING,
RECV_ATTR_INT(MAIL_ATTR_STATUS, &request_status),
ATTR_TYPE_END) != 1) {
if (msg_verbose || (errno != EPIPE && errno != ENOENT))
msg_warn("problem talking to service %s: %m",
var_verify_service);
} else {
break;
}
sleep(1);
clnt_stream_recover(vrfy_clnt);
}
return (request_status);
}
/*
* Proof-of-concept test client program.
*/
#ifdef TEST
#include <stdlib.h>
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <msg_vstream.h>
#include <stringops.h>
#include <vstring_vstream.h>
#include <mail_conf.h>
#define STR(x) vstring_str(x)
static NORETURN usage(char *myname)
{
msg_fatal("usage: %s [-v]", myname);
}
static void query(char *query, VSTRING *buf)
{
int status;
switch (verify_clnt_query(query, &status, buf)) {
case VRFY_STAT_OK:
vstream_printf("%-10s %d\n", "status", status);
vstream_printf("%-10s %s\n", "text", STR(buf));
vstream_fflush(VSTREAM_OUT);
break;
case VRFY_STAT_BAD:
msg_warn("bad request format");
break;
case VRFY_STAT_FAIL:
msg_warn("request failed");
break;
}
}
static void update(char *query)
{
char *addr;
char *status_text;
char *cp = query;
if ((addr = mystrtok(&cp, CHARS_SPACE)) == 0
|| (status_text = mystrtok(&cp, CHARS_SPACE)) == 0) {
msg_warn("bad request format");
return;
}
while (*cp && ISSPACE(*cp))
cp++;
if (*cp == 0) {
msg_warn("bad request format");
return;
}
switch (verify_clnt_update(query, atoi(status_text), cp)) {
case VRFY_STAT_OK:
vstream_printf("OK\n");
vstream_fflush(VSTREAM_OUT);
break;
case VRFY_STAT_BAD:
msg_warn("bad request format");
break;
case VRFY_STAT_FAIL:
msg_warn("request failed");
break;
}
}
int main(int argc, char **argv)
{
VSTRING *buffer = vstring_alloc(1);
char *cp;
int ch;
char *command;
signal(SIGPIPE, SIG_IGN);
msg_vstream_init(argv[0], VSTREAM_ERR);
mail_conf_read();
msg_info("using config files in %s", var_config_dir);
if (chdir(var_queue_dir) < 0)
msg_fatal("chdir %s: %m", var_queue_dir);
while ((ch = GETOPT(argc, argv, "v")) > 0) {
switch (ch) {
case 'v':
msg_verbose++;
break;
default:
usage(argv[0]);
}
}
if (argc - optind > 1)
usage(argv[0]);
while (vstring_fgets_nonl(buffer, VSTREAM_IN)) {
cp = STR(buffer);
if ((command = mystrtok(&cp, CHARS_SPACE)) == 0)
continue;
if (strcmp(command, "query") == 0)
query(cp, buffer);
else if (strcmp(command, "update") == 0)
update(cp);
else
msg_warn("unrecognized command: %s", command);
}
vstring_free(buffer);
return (0);
}
#endif
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