bbd6d60a85
very useful .dot files of your netgraph(4) to quickly visualize the nodes, hooks and edges. An example of this can be found here: http://people.freebsd.org/~green/sample-netgraph-dot.ps If anyone would like to refine the output further, please do so.
510 lines
11 KiB
C
510 lines
11 KiB
C
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/*
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* main.c
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*
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* Copyright (c) 1996-1999 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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* $FreeBSD$
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* $Whistle: main.c,v 1.12 1999/11/29 19:17:46 archie Exp $
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*/
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#include "ngctl.h"
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#define PROMPT "+ "
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#define MAX_ARGS 512
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#define WHITESPACE " \t\r\n\v\f"
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#define DUMP_BYTES_PER_LINE 16
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/* Internal functions */
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static int ReadFile(FILE *fp);
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static int DoParseCommand(char *line);
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static int DoCommand(int ac, char **av);
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static int DoInteractive(void);
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static const struct ngcmd *FindCommand(const char *string);
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static int MatchCommand(const struct ngcmd *cmd, const char *s);
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static void Usage(const char *msg);
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static int ReadCmd(int ac, char **av);
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static int HelpCmd(int ac, char **av);
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static int QuitCmd(int ac, char **av);
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/* List of commands */
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static const struct ngcmd *const cmds[] = {
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&config_cmd,
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&connect_cmd,
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&debug_cmd,
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&dot_cmd,
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&help_cmd,
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&list_cmd,
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&mkpeer_cmd,
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&msg_cmd,
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&name_cmd,
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&read_cmd,
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&rmhook_cmd,
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&show_cmd,
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&shutdown_cmd,
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&status_cmd,
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&types_cmd,
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&write_cmd,
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&quit_cmd,
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NULL
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};
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/* Commands defined in this file */
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const struct ngcmd read_cmd = {
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ReadCmd,
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"read <filename>",
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"Read and execute commands from a file",
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NULL,
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{ "source", "." }
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};
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const struct ngcmd help_cmd = {
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HelpCmd,
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"help [command]",
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"Show command summary or get more help on a specific command",
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NULL,
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{ "?" }
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};
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const struct ngcmd quit_cmd = {
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QuitCmd,
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"quit",
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"Exit program",
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NULL,
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{ "exit" }
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};
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/* Our control and data sockets */
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int csock, dsock;
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/*
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* main()
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*/
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int
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main(int ac, char *av[])
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{
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char name[NG_NODESIZ];
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int interactive = isatty(0) && isatty(1);
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FILE *fp = NULL;
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int ch, rtn = 0;
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/* Set default node name */
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snprintf(name, sizeof(name), "ngctl%d", getpid());
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/* Parse command line */
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while ((ch = getopt(ac, av, "df:n:")) != EOF) {
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switch (ch) {
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case 'd':
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NgSetDebug(NgSetDebug(-1) + 1);
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break;
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case 'f':
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if (strcmp(optarg, "-") == 0)
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fp = stdin;
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else if ((fp = fopen(optarg, "r")) == NULL)
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err(EX_NOINPUT, "%s", optarg);
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break;
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case 'n':
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snprintf(name, sizeof(name), "%s", optarg);
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break;
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case '?':
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default:
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Usage((char *)NULL);
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break;
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}
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}
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ac -= optind;
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av += optind;
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/* Create a new socket node */
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if (NgMkSockNode(name, &csock, &dsock) < 0)
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err(EX_OSERR, "can't create node");
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/* Do commands as requested */
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if (ac == 0) {
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if (fp != NULL) {
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rtn = ReadFile(fp);
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} else if (interactive) {
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rtn = DoInteractive();
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} else
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Usage("no command specified");
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} else {
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rtn = DoCommand(ac, av);
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}
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/* Convert command return code into system exit code */
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switch (rtn) {
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case CMDRTN_OK:
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case CMDRTN_QUIT:
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rtn = 0;
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break;
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case CMDRTN_USAGE:
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rtn = EX_USAGE;
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break;
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case CMDRTN_ERROR:
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rtn = EX_OSERR;
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break;
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}
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return(rtn);
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}
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/*
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* Process commands from a file
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*/
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static int
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ReadFile(FILE *fp)
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{
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char line[LINE_MAX];
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int num, rtn;
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for (num = 1; fgets(line, sizeof(line), fp) != NULL; num++) {
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if (*line == '#')
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continue;
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if ((rtn = DoParseCommand(line)) != 0) {
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warnx("line %d: error in file", num);
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return(rtn);
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}
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}
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return(CMDRTN_OK);
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}
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/*
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* Interactive mode
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*/
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static int
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DoInteractive(void)
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{
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const int maxfd = MAX(csock, dsock) + 1;
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(*help_cmd.func)(0, NULL);
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while (1) {
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struct timeval tv;
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fd_set rfds;
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/* See if any data or control messages are arriving */
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FD_ZERO(&rfds);
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FD_SET(csock, &rfds);
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FD_SET(dsock, &rfds);
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memset(&tv, 0, sizeof(tv));
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if (select(maxfd, &rfds, NULL, NULL, &tv) <= 0) {
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/* Issue prompt and wait for anything to happen */
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printf("%s", PROMPT);
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fflush(stdout);
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FD_ZERO(&rfds);
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FD_SET(0, &rfds);
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FD_SET(csock, &rfds);
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FD_SET(dsock, &rfds);
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if (select(maxfd, &rfds, NULL, NULL, NULL) < 0)
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err(EX_OSERR, "select");
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/* If not user input, print a newline first */
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if (!FD_ISSET(0, &rfds))
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printf("\n");
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}
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/* Display any incoming control message */
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if (FD_ISSET(csock, &rfds))
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MsgRead();
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/* Display any incoming data packet */
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if (FD_ISSET(dsock, &rfds)) {
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u_char buf[8192];
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char hook[NG_HOOKSIZ];
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int rl;
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/* Read packet from socket */
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if ((rl = NgRecvData(dsock,
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buf, sizeof(buf), hook)) < 0)
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err(EX_OSERR, "reading hook \"%s\"", hook);
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if (rl == 0)
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errx(EX_OSERR, "EOF from hook \"%s\"?", hook);
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/* Write packet to stdout */
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printf("Rec'd data packet on hook \"%s\":\n", hook);
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DumpAscii(buf, rl);
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}
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/* Get any user input */
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if (FD_ISSET(0, &rfds)) {
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char buf[LINE_MAX];
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if (fgets(buf, sizeof(buf), stdin) == NULL) {
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printf("\n");
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break;
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}
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if (DoParseCommand(buf) == CMDRTN_QUIT)
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break;
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}
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}
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return(CMDRTN_QUIT);
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}
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/*
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* Parse a command line and execute the command
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*/
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static int
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DoParseCommand(char *line)
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{
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char *av[MAX_ARGS];
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int ac;
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/* Parse line */
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for (ac = 0, av[0] = strtok(line, WHITESPACE);
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ac < MAX_ARGS - 1 && av[ac];
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av[++ac] = strtok(NULL, WHITESPACE));
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/* Do command */
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return(DoCommand(ac, av));
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}
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/*
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* Execute the command
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*/
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static int
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DoCommand(int ac, char **av)
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{
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const struct ngcmd *cmd;
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int rtn;
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if (ac == 0 || *av[0] == 0)
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return(CMDRTN_OK);
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if ((cmd = FindCommand(av[0])) == NULL)
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return(CMDRTN_ERROR);
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if ((rtn = (*cmd->func)(ac, av)) == CMDRTN_USAGE)
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warnx("usage: %s", cmd->cmd);
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return(rtn);
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}
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/*
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* Find a command
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*/
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static const struct ngcmd *
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FindCommand(const char *string)
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{
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int k, found = -1;
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for (k = 0; cmds[k] != NULL; k++) {
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if (MatchCommand(cmds[k], string)) {
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if (found != -1) {
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warnx("\"%s\": ambiguous command", string);
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return(NULL);
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}
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found = k;
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}
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}
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if (found == -1) {
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warnx("\"%s\": unknown command", string);
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return(NULL);
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}
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return(cmds[found]);
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}
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/*
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* See if string matches a prefix of "cmd" (or an alias) case insensitively
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*/
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static int
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MatchCommand(const struct ngcmd *cmd, const char *s)
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{
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int a;
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/* Try to match command, ignoring the usage stuff */
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if (strlen(s) <= strcspn(cmd->cmd, WHITESPACE)) {
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if (strncasecmp(s, cmd->cmd, strlen(s)) == 0)
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return (1);
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}
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/* Try to match aliases */
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for (a = 0; a < MAX_CMD_ALIAS && cmd->aliases[a] != NULL; a++) {
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if (strlen(cmd->aliases[a]) >= strlen(s)) {
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if (strncasecmp(s, cmd->aliases[a], strlen(s)) == 0)
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return (1);
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}
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}
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/* No match */
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return (0);
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}
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/*
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* ReadCmd()
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*/
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static int
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ReadCmd(int ac, char **av)
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{
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FILE *fp;
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int rtn;
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/* Open file */
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switch (ac) {
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case 2:
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if ((fp = fopen(av[1], "r")) == NULL) {
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warn("%s", av[1]);
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return(CMDRTN_ERROR);
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}
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break;
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default:
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return(CMDRTN_USAGE);
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}
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/* Process it */
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rtn = ReadFile(fp);
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fclose(fp);
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return(rtn);
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}
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/*
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* HelpCmd()
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*/
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static int
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HelpCmd(int ac, char **av)
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{
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const struct ngcmd *cmd;
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int k;
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switch (ac) {
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case 0:
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case 1:
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/* Show all commands */
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printf("Available commands:\n");
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for (k = 0; cmds[k] != NULL; k++) {
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char *s, buf[100];
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cmd = cmds[k];
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snprintf(buf, sizeof(buf), "%s", cmd->cmd);
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for (s = buf; *s != '\0' && !isspace(*s); s++);
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*s = '\0';
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printf(" %-10s %s\n", buf, cmd->desc);
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}
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return(CMDRTN_OK);
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default:
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/* Show help on a specific command */
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if ((cmd = FindCommand(av[1])) != NULL) {
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printf("usage: %s\n", cmd->cmd);
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if (cmd->aliases[0] != NULL) {
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int a = 0;
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printf("Aliases: ");
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while (1) {
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printf("%s", cmd->aliases[a++]);
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if (a == MAX_CMD_ALIAS
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|| cmd->aliases[a] == NULL) {
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printf("\n");
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break;
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}
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printf(", ");
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}
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}
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printf("Summary: %s\n", cmd->desc);
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if (cmd->help != NULL) {
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const char *s;
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char buf[65];
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int tot, len, done;
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printf("Description:\n");
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for (s = cmd->help; *s != '\0'; s += len) {
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while (isspace(*s))
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s++;
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tot = snprintf(buf,
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sizeof(buf), "%s", s);
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len = strlen(buf);
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done = len == tot;
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if (!done) {
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while (len > 0
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&& !isspace(buf[len-1]))
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buf[--len] = '\0';
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}
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printf(" %s\n", buf);
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}
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}
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}
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}
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return(CMDRTN_OK);
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}
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/*
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* QuitCmd()
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*/
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static int
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QuitCmd(int ac, char **av)
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{
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return(CMDRTN_QUIT);
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}
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/*
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* Dump data in hex and ASCII form
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*/
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void
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DumpAscii(const u_char *buf, int len)
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{
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char ch, sbuf[100];
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int k, count;
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for (count = 0; count < len; count += DUMP_BYTES_PER_LINE) {
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snprintf(sbuf, sizeof(sbuf), "%04x: ", count);
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for (k = 0; k < DUMP_BYTES_PER_LINE; k++) {
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if (count + k < len) {
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snprintf(sbuf + strlen(sbuf),
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sizeof(sbuf) - strlen(sbuf),
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"%02x ", buf[count + k]);
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} else {
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snprintf(sbuf + strlen(sbuf),
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sizeof(sbuf) - strlen(sbuf), " ");
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}
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}
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snprintf(sbuf + strlen(sbuf), sizeof(sbuf) - strlen(sbuf), " ");
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for (k = 0; k < DUMP_BYTES_PER_LINE; k++) {
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if (count + k < len) {
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ch = isprint(buf[count + k]) ?
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buf[count + k] : '.';
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snprintf(sbuf + strlen(sbuf),
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sizeof(sbuf) - strlen(sbuf), "%c", ch);
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} else {
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snprintf(sbuf + strlen(sbuf),
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sizeof(sbuf) - strlen(sbuf), " ");
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}
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}
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printf("%s\n", sbuf);
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}
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}
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/*
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* Usage()
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*/
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static void
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Usage(const char *msg)
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{
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if (msg)
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warnx("%s", msg);
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fprintf(stderr,
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"usage: ngctl [-d] [-f file] [-n name] [command ...]\n");
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exit(EX_USAGE);
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}
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