| Current Path : /usr/src/contrib/ngatm/sscop/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/ngatm/sscop/sscop_main.c |
/*
* Copyright (c) 2001-2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* All rights reserved.
*
* Author: Harti Brandt <harti@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Begemot: libunimsg/sscop/sscop_main.c,v 1.5 2005/05/23 11:46:17 brandt_h Exp $
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include <signal.h>
#include <assert.h>
#include <err.h>
#include <netnatm/unimsg.h>
#include <netnatm/saal/sscop.h>
#include "common.h"
static int sigusr1; /* got SIGUSR1 */
static int unidir; /* write only user */
static int end_at_eof = 1; /* send RELEASE_request at user EOF */
static volatile int ready; /* flag if connection is established */
static volatile int finished; /* got release confirm or indication */
static const char usgtxt[] = "\
SSCOP transport protocol\n\
Usage: sscop [-h] [-Fbefirwx3] [-ap=v] [-lN] [-tt=m] [-v X] [-V X] [-W N]\n\
Options:\n\
-F use framing for sscop also\n\
-V X set verbose flags to hex X\n\
-W N set initial window to N\n\
-a p=v set parameter 'p' to 'v'\n\
-b enable robustness enhancement\n\
-e don't RELEASE_request on user EOF\n\
-f use begemot frame functions for user fd\n\
-h print this info\n\
-i use user fd only for output\n\
-lN loose every nth message\n\
-r reverse user and sscop file descriptors\n\
-t t=m set timer 't' to 'm' milliseconds\n\
-v X set sscop verbose flags to hex X\n\
-w don't start conversation\n\
-x enable POLL after retransmission\n\
-3 redirect output to fd 3\n\
Timers are cc, poll, ka, nr or idle; parameters are j, k, cc, pd or stat.\n";
static void sscop_send_manage(struct sscop *, void *,
enum sscop_maasig, struct uni_msg *, u_int, u_int);
static void sscop_send_upper(struct sscop *, void *, enum sscop_aasig,
struct SSCOP_MBUF_T *, u_int);
static void sscop_send_lower(struct sscop *, void *, struct SSCOP_MBUF_T *);
static const struct sscop_funcs sscop_funcs = {
sscop_send_manage,
sscop_send_upper,
sscop_send_lower,
sscop_verbose,
sscop_start_timer,
sscop_stop_timer
};
/*
* SSCOP file descriptor is ready. Allocate and read one message
* and dispatch a signal.
*/
#ifdef USE_LIBBEGEMOT
static void
proto_infunc(int fd, int mask __unused, void *uap)
#else
static void
proto_infunc(evContext ctx __unused, void *uap, int fd, int mask __unused)
#endif
{
struct uni_msg *m;
if ((m = proto_msgin(fd)) != NULL)
sscop_input((struct sscop *)uap, m);
}
/*
* User input. Allocate and read message and dispatch signal.
*/
#ifdef USE_LIBBEGEMOT
static void
user_infunc(int fd, int mask __unused, void *uap)
#else
static void
user_infunc(evContext ctx __unused, void *uap, int fd, int mask __unused)
#endif
{
struct uni_msg *m;
if ((m = user_msgin(fd)) != NULL)
sscop_aasig((struct sscop *)uap, SSCOP_DATA_request, m, 0);
else if (end_at_eof)
sscop_aasig((struct sscop *)uap, SSCOP_RELEASE_request, 0, 0);
}
static void
onusr1(int s __unused)
{
sigusr1++;
}
int
main(int argc, char *argv[])
{
int opt;
struct sscop *sscop;
struct sscop_param param;
struct sigaction sa;
int wait = 0;
u_int mask;
#ifndef USE_LIBBEGEMOT
evEvent ev;
#endif
/*
* Default is to have the USER on stdin and SSCOP on stdout
*/
sscop_fd = 0;
user_fd = 1;
user_out_fd = -1;
memset(¶m, 0, sizeof(param));
param.maxk = MAXUSRMSG;
param.maxj = 0;
param.maxcc = 4;
mask = SSCOP_SET_MAXK | SSCOP_SET_MAXJ | SSCOP_SET_MAXCC;
while((opt = getopt(argc, argv, "3a:befFhil:rt:v:V:wW:x")) != -1)
switch(opt) {
case '3':
user_out_fd = 3;
break;
case 'e':
end_at_eof = 0;
break;
case 'f':
useframe = 1;
break;
case 'F':
sscopframe = 1;
break;
case 'h':
fprintf(stderr, usgtxt);
exit(0);
case 'i':
unidir++;
break;
case 'l':
loose = strtoul(optarg, NULL, 0);
break;
case 'r':
sscop_fd = 1;
user_fd = 0;
break;
case 'v':
sscop_vflag = strtoul(optarg, NULL, 16);
break;
case 'V':
verbose = strtoul(optarg, NULL, 16);
break;
case 'w':
wait = 1;
break;
case 'a':
case 't':
case 'b':
case 'x':
case 'W':
parse_param(¶m, &mask, opt, optarg);
break;
}
if(user_out_fd < 0)
user_out_fd = user_fd;
#ifndef USE_LIBBEGEMOT
if (evCreate(&evctx))
err(1, "evCreate");
#endif
/*
* Catch USR1
*/
sa.sa_handler = onusr1;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
if(sigaction(SIGUSR1, &sa, NULL))
err(1, "sigaction(SIGUSR1)");
/*
* Allocate and initialize SSCOP
*/
if ((sscop = sscop_create(NULL, &sscop_funcs)) == NULL)
err(1, NULL);
sscop_setdebug(sscop, sscop_vflag);
if ((errno = sscop_setparam(sscop, ¶m, &mask)) != 0)
err(1, "can't set sscop parameters %#x", mask);
/*
* Register sscop fd
*/
#ifdef USE_LIBBEGEMOT
if ((sscop_h = poll_register(sscop_fd, proto_infunc,
sscop, POLL_IN)) == -1)
err(1, "can't select on sscop fd");
#else
if (evSelectFD(evctx, sscop_fd, EV_READ, proto_infunc, sscop, &sscop_h))
err(1, "can't select on sscop fd");
#endif
/*
* if we are active - send establish request
*/
if(!wait)
sscop_aasig(sscop, SSCOP_ESTABLISH_request, NULL, 1);
/*
* Run protocol until it get's ready
*/
while (sscop_fd >= 0 && !ready) {
#ifdef USE_LIBBEGEMOT
poll_dispatch(1);
#else
if (evGetNext(evctx, &ev, EV_WAIT) == 0) {
if (evDispatch(evctx, ev))
err(1, "dispatch event");
} else if (errno != EINTR)
err(1, "get event");
#endif
}
/*
* If this led to a closed file - exit.
*/
if (sscop_fd < 0) {
VERBOSE(("SSCOP file descriptor closed - exiting"));
sscop_destroy(sscop);
return 0;
}
VERBOSE(("READY - starting data transfer"));
if (!unidir &&
#ifdef USE_LIBBEGEMOT
((user_h = poll_register(user_fd, user_infunc, sscop, POLL_IN)) == -1))
#else
evSelectFD(evctx, user_fd, EV_READ, user_infunc, sscop, &user_h))
#endif
err(1, "can't select on sscop fd");
while (!sigusr1 && sscop_fd >= 0) {
#ifdef USE_LIBBEGEMOT
poll_dispatch(1);
#else
if (evGetNext(evctx, &ev, EV_WAIT) == 0) {
if (evDispatch(evctx, ev))
err(1, "dispatch event");
} else if (errno != EINTR)
err(1, "get event");
#endif
}
if (sigusr1 && sscop_fd >= 0) {
/*
* Release if we still have the connection
*/
sscop_aasig(sscop, SSCOP_RELEASE_request, NULL, 0);
while (!finished && sscop_fd >= 0) {
#ifdef USE_LIBBEGEMOT
poll_dispatch(1);
#else
if (evGetNext(evctx, &ev, EV_WAIT) == 0) {
if (evDispatch(evctx, ev))
err(1, "dispatch event");
} else if (errno != EINTR)
err(1, "get event");
#endif
}
}
VERBOSE(("SSCOP file descriptor closed - exiting"));
sscop_destroy(sscop);
return (0);
}
/*
* AAL OUTPUT
*/
static void
sscop_send_lower(struct sscop *sscop __unused, void *arg __unused,
struct SSCOP_MBUF_T *m)
{
proto_msgout(m);
}
/*
* Write the message to the user and move the window
*/
static void
uoutput(struct sscop *sscop, struct uni_msg *m)
{
user_msgout(m);
sscop_window(sscop, +1);
}
/*
* SSCOP AA-SIGNALS
*/
static void
sscop_send_upper(struct sscop *sscop, void *arg __unused, enum sscop_aasig sig,
struct SSCOP_MBUF_T *m, u_int p __unused)
{
VERBOSE(("--> got aa %d(%s)", sig, sscop_signame(sig)));
switch (sig) {
case SSCOP_RELEASE_indication:
if (end_at_eof) {
VERBOSE((" ... exiting"));
#ifdef USE_LIBBEGEMOT
poll_unregister(sscop_h);
#else
evDeselectFD(evctx, sscop_h);
#endif
(void)close(sscop_fd);
sscop_fd = -1;
}
finished++;
if (m)
uni_msg_destroy(m);
break;
case SSCOP_RELEASE_confirm:
if (end_at_eof) {
VERBOSE((" ... exiting"));
#ifdef USE_LIBBEGEMOT
poll_unregister(sscop_h);
#else
evDeselectFD(evctx, sscop_h);
#endif
(void)close(sscop_fd);
sscop_fd = -1;
}
finished++;
break;
case SSCOP_ESTABLISH_indication:
sscop_aasig(sscop, SSCOP_ESTABLISH_response, NULL, 1);
ready++;
if (m)
uni_msg_destroy(m);
break;
case SSCOP_ESTABLISH_confirm:
ready++;
if (m)
uni_msg_destroy(m);
break;
case SSCOP_DATA_indication:
assert(m != NULL);
uoutput(sscop, m);
break;
case SSCOP_UDATA_indication:
assert(m != NULL);
VERBOSE(("UDATA.indication ignored"));
uni_msg_destroy(m);
break;
case SSCOP_RECOVER_indication:
sscop_aasig(sscop, SSCOP_RECOVER_response, NULL, 0);
break;
case SSCOP_RESYNC_indication:
sscop_aasig(sscop, SSCOP_RESYNC_response, NULL, 0);
if (m)
uni_msg_destroy(m);
break;
case SSCOP_RESYNC_confirm:
break;
case SSCOP_RETRIEVE_indication:
case SSCOP_RETRIEVE_COMPL_indication:
warnx("Ooops. A retrieve indication");
abort();
case SSCOP_ESTABLISH_request:
case SSCOP_RELEASE_request:
case SSCOP_ESTABLISH_response:
case SSCOP_DATA_request:
case SSCOP_UDATA_request:
case SSCOP_RECOVER_response:
case SSCOP_RESYNC_request:
case SSCOP_RESYNC_response:
case SSCOP_RETRIEVE_request:
warnx("bad signal for this direction");
abort();
}
}
/*
* This get's called for MAAL
*/
static void
sscop_send_manage(struct sscop *sscop __unused, void *arg __unused,
enum sscop_maasig sig, struct uni_msg *m, u_int error, u_int cnt)
{
VERBOSE(("--> got maa %d(%s)", sig, sscop_msigname(sig)));
switch (sig) {
case SSCOP_MDATA_indication:
VERBOSE(("MDATA.indication ignored"));
uni_msg_destroy(m);
break;
case SSCOP_MERROR_indication:
VERBOSE(("MAAL-ERROR.indication '%c' %u", error, cnt));
break;
case SSCOP_MDATA_request:
warnx("bad signal for this direction");
abort();
}
}