147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
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/*
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* msg.c
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*
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* Copyright (c) 1999 Whistle Communications, Inc.
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* All rights reserved.
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*
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* Subject to the following obligations and disclaimer of warranty, use and
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* redistribution of this software, in source or object code forms, with or
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* without modifications are expressly permitted by Whistle Communications;
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* provided, however, that:
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* 1. Any and all reproductions of the source or object code must include the
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* copyright notice above and the following disclaimer of warranties; and
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* 2. No rights are granted, in any manner or form, to use Whistle
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* Communications, Inc. trademarks, including the mark "WHISTLE
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* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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* such appears in the above copyright notice or in the software.
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*
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* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
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* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
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* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
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* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
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* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
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* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
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* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
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* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* $Whistle: msg.c,v 1.2 1999/11/29 23:38:35 archie Exp $
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* $FreeBSD$
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*/
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#include "ngctl.h"
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#define BUF_SIZE 4096
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static int MsgCmd(int ac, char **av);
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const struct ngcmd msg_cmd = {
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MsgCmd,
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"msg path command [args ... ]",
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"Send a netgraph control message to the node at \"path\"",
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"The msg command constructs a netgraph control message from the"
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" command name and ASCII arguments (if any) and sends that message"
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" to the node. It does this by first asking the node to convert"
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" the ASCII message into binary format, and resending the result.",
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{ "cmd" }
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};
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static int
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MsgCmd(int ac, char **av)
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{
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char buf[BUF_SIZE];
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char *path, *cmdstr;
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int i;
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/* Get arguments */
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if (ac < 3)
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return(CMDRTN_USAGE);
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path = av[1];
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cmdstr = av[2];
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/* Put command and arguments back together as one string */
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for (*buf = '\0', i = 3; i < ac; i++) {
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snprintf(buf + strlen(buf),
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sizeof(buf) - strlen(buf), " %s", av[i]);
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}
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/* Send it */
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if (NgSendAsciiMsg(csock, path, "%s%s", cmdstr, buf) < 0) {
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warn("send msg");
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return(CMDRTN_ERROR);
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}
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/* See if a synchronous reply awaits */
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{
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struct timeval tv;
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fd_set rfds;
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FD_ZERO(&rfds);
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FD_SET(csock, &rfds);
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memset(&tv, 0, sizeof(tv));
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switch (select(csock + 1, &rfds, NULL, NULL, &tv)) {
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case -1:
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err(EX_OSERR, "select");
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case 0:
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break;
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default:
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MsgRead();
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break;
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}
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}
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/* Done */
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return(CMDRTN_OK);
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}
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/*
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* Read and display the next incoming control message
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*/
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void
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MsgRead()
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{
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u_char buf[2 * sizeof(struct ng_mesg) + BUF_SIZE];
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struct ng_mesg *const m = (struct ng_mesg *)buf;
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struct ng_mesg *const ascii = (struct ng_mesg *)m->data;
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char path[NG_PATHLEN+1];
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/* Get incoming message (in binary form) */
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if (NgRecvMsg(csock, m, sizeof(buf), path) < 0) {
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warn("recv incoming message");
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return;
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}
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/* Ask originating node to convert message to ASCII */
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if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE,
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NGM_BINARY2ASCII, m, sizeof(*m) + m->header.arglen) < 0
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|| NgRecvMsg(csock, m, sizeof(buf), NULL) < 0) {
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printf("Rec'd %s %d from \"%s\":\n",
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(m->header.flags & NGF_RESP) != 0 ? "response" : "command",
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m->header.cmd, path);
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if (m->header.arglen == 0)
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printf("No arguments\n");
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else
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DumpAscii(m->data, m->header.arglen);
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return;
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}
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/* Display message in ASCII form */
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printf("Rec'd %s \"%s\" (%d) from \"%s\":\n",
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(ascii->header.flags & NGF_RESP) != 0 ? "response" : "command",
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ascii->header.cmdstr, ascii->header.cmd, path);
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if (*ascii->data != '\0')
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printf("Args:\t%s\n", ascii->data);
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else
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printf("No arguments\n");
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}
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