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/*
* msg.c
*
* Copyright (c) 1999 Whistle Communications, Inc.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Whistle Communications;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties; and
* 2. No rights are granted, in any manner or form, to use Whistle
* Communications, Inc. trademarks, including the mark "WHISTLE
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
* such appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER 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 WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* $Whistle: msg.c,v 1.2 1999/11/29 23:38:35 archie Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <err.h>
#include <netgraph.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include "ngctl.h"
static int MsgCmd(int ac, char **av);
const struct ngcmd msg_cmd = {
MsgCmd,
"msg path command [args ... ]",
"Send a netgraph control message to the node at \"path\"",
"The msg command constructs a netgraph control message from the"
" command name and ASCII arguments (if any) and sends that message"
" to the node. It does this by first asking the node to convert"
" the ASCII message into binary format, and resending the result.",
{ "cmd" }
};
static int
MsgCmd(int ac, char **av)
{
char *buf;
char *path, *cmdstr;
int i, len;
/* Get arguments */
if (ac < 3)
return (CMDRTN_USAGE);
path = av[1];
cmdstr = av[2];
/* Put command and arguments back together as one string */
for (len = 1, i = 3; i < ac; i++)
len += strlen(av[i]) + 1;
if ((buf = malloc(len)) == NULL) {
warn("malloc");
return (CMDRTN_ERROR);
}
for (*buf = '\0', i = 3; i < ac; i++) {
snprintf(buf + strlen(buf),
len - strlen(buf), " %s", av[i]);
}
/* Send it */
if (NgSendAsciiMsg(csock, path, "%s%s", cmdstr, buf) < 0) {
free(buf);
warn("send msg");
return (CMDRTN_ERROR);
}
free(buf);
/* See if a synchronous reply awaits */
{
struct timeval tv;
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(csock, &rfds);
memset(&tv, 0, sizeof(tv));
switch (select(csock + 1, &rfds, NULL, NULL, &tv)) {
case -1:
err(EX_OSERR, "select");
case 0:
break;
default:
MsgRead();
break;
}
}
/* Done */
return (CMDRTN_OK);
}
/*
* Read and display the next incoming control message
*/
void
MsgRead(void)
{
struct ng_mesg *m, *m2;
struct ng_mesg *ascii;
char path[NG_PATHSIZ];
/* Get incoming message (in binary form) */
if (NgAllocRecvMsg(csock, &m, path) < 0) {
warn("recv incoming message");
return;
}
/* Ask originating node to convert message to ASCII */
if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE,
NGM_BINARY2ASCII, m, sizeof(*m) + m->header.arglen) < 0
|| NgAllocRecvMsg(csock, &m2, NULL) < 0) {
printf("Rec'd %s %d from \"%s\":\n",
(m->header.flags & NGF_RESP) != 0 ? "response" : "command",
m->header.cmd, path);
if (m->header.arglen == 0)
printf("No arguments\n");
else
DumpAscii((const u_char *)m->data, m->header.arglen);
free(m);
return;
}
/* Display message in ASCII form */
free(m);
ascii = (struct ng_mesg *)m2->data;
printf("Rec'd %s \"%s\" (%d) from \"%s\":\n",
(ascii->header.flags & NGF_RESP) != 0 ? "response" : "command",
ascii->header.cmdstr, ascii->header.cmd, path);
if (*ascii->data != '\0')
printf("Args:\t%s\n", ascii->data);
else
printf("No arguments\n");
free(m2);
}
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