mconnect.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* mconnect.c - A program to test out SMTP connections.
* Usage: mconnect [host]
* ... SMTP dialog
* ^C or ^D or QUIT
*/
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <ctype.h>
#include <string.h>
#include <strings.h>
#include <sgtty.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <errno.h>
union bigsockaddr
{
struct sockaddr sa; /* general version */
struct sockaddr_in sin; /* INET family */
struct sockaddr_in6 sin6; /* INET/IPv6 */
};
static struct sgttyb TtyBuf;
static int raw = 0;
/* ARGSUSED */
static void
finis(sig)
int sig;
{
if (raw)
(void) ioctl(0, TIOCSETP, &TtyBuf);
exit(0);
}
int
main(argc, argv)
int argc;
char **argv;
{
union bigsockaddr SendmailAddress;
register int s;
char *host = NULL;
int pid;
int on = 1;
struct servent *sp;
char buf[1000];
register FILE *f;
register struct hostent *hp;
in_port_t port = 0;
int err;
char buf6[INET6_ADDRSTRLEN];
int addr_num = 0;
int addrlen;
(void) ioctl(0, TIOCGETP, &TtyBuf);
(void) signal(SIGINT, finis);
while (--argc > 0)
{
register char *p;
p = *++argv;
if (*p == '-')
{
switch (*++p)
{
case 'h': /* host */
break;
case 'p': /* port */
port = htons(atoi(*++argv));
argc--;
break;
case 'r': /* raw connection */
raw = 1;
break;
}
} else if (host == NULL)
host = p;
}
if (host == NULL)
host = "localhost";
bzero(&SendmailAddress, sizeof (SendmailAddress));
hp = getipnodebyname(host, AF_INET6, AI_DEFAULT|AI_ALL, &err);
if (hp == NULL)
{
(void) fprintf(stderr, "mconnect: unknown host %s\r\n", host);
exit(0);
}
if (port == 0) {
sp = getservbyname("smtp", "tcp");
if (sp != NULL)
port = sp->s_port;
}
for (;;) {
bcopy(hp->h_addr_list[addr_num],
&SendmailAddress.sin6.sin6_addr, IN6ADDRSZ);
if (IN6_IS_ADDR_V4MAPPED(&SendmailAddress.sin6.sin6_addr)) {
SendmailAddress.sa.sa_family = AF_INET;
SendmailAddress.sin.sin_port = port;
bcopy(&hp->h_addr_list[addr_num][IN6ADDRSZ - INADDRSZ],
&SendmailAddress.sin.sin_addr, INADDRSZ);
addrlen = sizeof (struct sockaddr_in);
} else {
SendmailAddress.sa.sa_family = AF_INET6;
SendmailAddress.sin6.sin6_port = port;
addrlen = sizeof (struct sockaddr_in6);
}
s = socket(SendmailAddress.sa.sa_family, SOCK_STREAM, 0);
if (s < 0)
{
perror("socket");
exit(-1);
}
(void) setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char *)&on,
sizeof (on));
if (SendmailAddress.sa.sa_family == AF_INET)
(void) printf("connecting to host %s (%s), port %d\r\n",
host, inet_ntoa(SendmailAddress.sin.sin_addr),
ntohs(SendmailAddress.sin.sin_port));
else
(void) printf("connecting to host %s (%s), port %d\r\n",
host, inet_ntop(AF_INET6,
SendmailAddress.sin6.sin6_addr.s6_addr,
buf6, sizeof (buf6)),
ntohs(SendmailAddress.sin6.sin6_port));
if (connect(s, (struct sockaddr *)&SendmailAddress,
addrlen) >= 0)
break;
if (hp->h_addr_list[++addr_num] != NULL) {
(void) printf("connect failed (%s), next address ...\n",
strerror(errno));
bcopy(hp->h_addr_list[addr_num],
&SendmailAddress.sin6.sin6_addr, IN6ADDRSZ);
if (IN6_IS_ADDR_V4MAPPED(
&SendmailAddress.sin6.sin6_addr)) {
SendmailAddress.sa.sa_family = AF_INET;
bcopy(&hp->h_addr_list[addr_num]
[IN6ADDRSZ - INADDRSZ],
&SendmailAddress.sin.sin_addr,
INADDRSZ);
addrlen = sizeof (struct sockaddr_in);
} else {
SendmailAddress.sa.sa_family = AF_INET6;
addrlen = sizeof (struct sockaddr_in6);
}
continue;
}
perror("connect");
exit(-1);
}
if (raw) {
TtyBuf.sg_flags &= ~CRMOD;
(void) ioctl(0, TIOCSETP, &TtyBuf);
TtyBuf.sg_flags |= CRMOD;
}
/* good connection, fork both sides */
(void) printf("connection open\n");
pid = fork();
if (pid < 0)
{
perror("fork");
exit(-1);
}
if (pid == 0)
{
/* child -- standard input to sendmail */
int c;
f = fdopen(s, "w");
while ((c = fgetc(stdin)) >= 0)
{
if (!raw && c == '\n')
(void) fputc('\r', f);
(void) fputc(c, f);
if (c == '\n')
(void) fflush(f);
}
(void) shutdown(s, 1);
(void) sleep(10);
}
else
{
/* parent -- sendmail to standard output */
f = fdopen(s, "r");
while (fgets(buf, sizeof (buf), f) != NULL)
{
(void) fputs(buf, stdout);
(void) fflush(stdout);
}
(void) kill(pid, SIGTERM);
}
if (raw)
(void) ioctl(0, TIOCSETP, &TtyBuf);
return (0);
}