| 1 | |
| 2 | /* |
| 3 | * main.c |
| 4 | * |
| 5 | * Copyright (c) 1996-1999 Whistle Communications, Inc. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Subject to the following obligations and disclaimer of warranty, use and |
| 9 | * redistribution of this software, in source or object code forms, with or |
| 10 | * without modifications are expressly permitted by Whistle Communications; |
| 11 | * provided, however, that: |
| 12 | * 1. Any and all reproductions of the source or object code must include the |
| 13 | * copyright notice above and the following disclaimer of warranties; and |
| 14 | * 2. No rights are granted, in any manner or form, to use Whistle |
| 15 | * Communications, Inc. trademarks, including the mark "WHISTLE |
| 16 | * COMMUNICATIONS" on advertising, endorsements, or otherwise except as |
| 17 | * such appears in the above copyright notice or in the software. |
| 18 | * |
| 19 | * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND |
| 20 | * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO |
| 21 | * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, |
| 22 | * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF |
| 23 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. |
| 24 | * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY |
| 25 | * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS |
| 26 | * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. |
| 27 | * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES |
| 28 | * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING |
| 29 | * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
| 30 | * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 31 | * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY |
| 32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 34 | * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY |
| 35 | * OF SUCH DAMAGE. |
| 36 | * |
| 37 | * $FreeBSD: src/usr.sbin/nghook/main.c,v 1.4 1999/11/30 02:09:36 archie Exp $ |
| 38 | * $DragonFly: src/usr.sbin/nghook/main.c,v 1.5 2008/07/10 18:29:52 swildner Exp $ |
| 39 | * $Whistle: main.c,v 1.9 1999/01/20 00:26:26 archie Exp $ |
| 40 | */ |
| 41 | |
| 42 | #include <stdio.h> |
| 43 | #include <stdlib.h> |
| 44 | #include <string.h> |
| 45 | #include <ctype.h> |
| 46 | #include <unistd.h> |
| 47 | #include <sysexits.h> |
| 48 | #include <errno.h> |
| 49 | #include <err.h> |
| 50 | |
| 51 | #include <sys/types.h> |
| 52 | #include <sys/socket.h> |
| 53 | #include <sys/select.h> |
| 54 | |
| 55 | #include <netgraph.h> |
| 56 | |
| 57 | #define DEFAULT_HOOKNAME "debug" |
| 58 | #define NG_SOCK_HOOK_NAME "hook" |
| 59 | |
| 60 | #define BUF_SIZE (64 * 1024) |
| 61 | |
| 62 | static void WriteAscii(u_char * buf, int len); |
| 63 | static void Usage(void); |
| 64 | |
| 65 | /* |
| 66 | * main() |
| 67 | */ |
| 68 | int |
| 69 | main(int ac, char *av[]) |
| 70 | { |
| 71 | struct ngm_connect ngc; |
| 72 | const char *path = NULL, *hook = DEFAULT_HOOKNAME; |
| 73 | int csock, dsock; |
| 74 | int asciiFlag = 0; |
| 75 | int ch; |
| 76 | |
| 77 | /* Parse flags */ |
| 78 | while ((ch = getopt(ac, av, "da")) != -1) { |
| 79 | switch (ch) { |
| 80 | case 'd': |
| 81 | NgSetDebug(NgSetDebug(-1) + 1); |
| 82 | break; |
| 83 | case 'a': |
| 84 | asciiFlag = 1; |
| 85 | break; |
| 86 | case '?': |
| 87 | default: |
| 88 | Usage(); |
| 89 | } |
| 90 | } |
| 91 | ac -= optind; |
| 92 | av += optind; |
| 93 | |
| 94 | /* Get params */ |
| 95 | switch (ac) { |
| 96 | case 2: |
| 97 | hook = av[1]; |
| 98 | /* FALLTHROUGH */ |
| 99 | case 1: |
| 100 | path = av[0]; |
| 101 | break; |
| 102 | default: |
| 103 | Usage(); |
| 104 | } |
| 105 | |
| 106 | /* Get sockets */ |
| 107 | if (NgMkSockNode(NULL, &csock, &dsock) < 0) |
| 108 | errx(EX_OSERR, "can't get sockets"); |
| 109 | |
| 110 | /* Connect socket node to specified node */ |
| 111 | snprintf(ngc.path, sizeof(ngc.path), "%s", path); |
| 112 | snprintf(ngc.ourhook, sizeof(ngc.ourhook), NG_SOCK_HOOK_NAME); |
| 113 | snprintf(ngc.peerhook, sizeof(ngc.peerhook), "%s", hook); |
| 114 | |
| 115 | if (NgSendMsg(csock, ".", |
| 116 | NGM_GENERIC_COOKIE, NGM_CONNECT, &ngc, sizeof(ngc)) < 0) |
| 117 | errx(EX_OSERR, "can't connect to node"); |
| 118 | |
| 119 | /* Relay data */ |
| 120 | while (1) { |
| 121 | fd_set rfds; |
| 122 | |
| 123 | /* Setup bits */ |
| 124 | FD_ZERO(&rfds); |
| 125 | FD_SET(0, &rfds); |
| 126 | FD_SET(dsock, &rfds); |
| 127 | |
| 128 | /* Wait for something to happen */ |
| 129 | if (select(FD_SETSIZE, &rfds, NULL, NULL, NULL) < 0) |
| 130 | err(EX_OSERR, "select"); |
| 131 | |
| 132 | /* Check data from socket */ |
| 133 | if (FD_ISSET(dsock, &rfds)) { |
| 134 | char buf[BUF_SIZE]; |
| 135 | int rl, wl; |
| 136 | |
| 137 | /* Read packet from socket */ |
| 138 | if ((rl = NgRecvData(dsock, |
| 139 | buf, sizeof(buf), NULL)) < 0) |
| 140 | err(EX_OSERR, "read(hook)"); |
| 141 | if (rl == 0) |
| 142 | errx(EX_OSERR, "read EOF from hook?!"); |
| 143 | |
| 144 | /* Write packet to stdout */ |
| 145 | if (asciiFlag) |
| 146 | WriteAscii((u_char *) buf, rl); |
| 147 | else if ((wl = write(1, buf, rl)) != rl) { |
| 148 | if (wl < 0) { |
| 149 | err(EX_OSERR, "write(stdout)"); |
| 150 | } else { |
| 151 | errx(EX_OSERR, |
| 152 | "stdout: read %d, wrote %d", |
| 153 | rl, wl); |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /* Check data from stdin */ |
| 159 | if (FD_ISSET(0, &rfds)) { |
| 160 | char buf[BUF_SIZE]; |
| 161 | int rl; |
| 162 | |
| 163 | /* Read packet from stdin */ |
| 164 | if ((rl = read(0, buf, sizeof(buf))) < 0) |
| 165 | err(EX_OSERR, "read(stdin)"); |
| 166 | if (rl == 0) |
| 167 | errx(EX_OSERR, "EOF(stdin)"); |
| 168 | |
| 169 | /* Write packet to socket */ |
| 170 | if (NgSendData(dsock, NG_SOCK_HOOK_NAME, buf, rl) < 0) |
| 171 | err(EX_OSERR, "write(hook)"); |
| 172 | } |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Dump data in hex and ASCII form |
| 178 | */ |
| 179 | static void |
| 180 | WriteAscii(u_char *buf, int len) |
| 181 | { |
| 182 | char ch, sbuf[100]; |
| 183 | int k, count; |
| 184 | |
| 185 | for (count = 0; count < len; count += 16) { |
| 186 | snprintf(sbuf, sizeof(sbuf), "%04x: ", count); |
| 187 | for (k = 0; k < 16; k++) |
| 188 | if (count + k < len) |
| 189 | snprintf(sbuf + strlen(sbuf), |
| 190 | sizeof(sbuf) - strlen(sbuf), |
| 191 | "%02x ", buf[count + k]); |
| 192 | else |
| 193 | snprintf(sbuf + strlen(sbuf), |
| 194 | sizeof(sbuf) - strlen(sbuf), " "); |
| 195 | snprintf(sbuf + strlen(sbuf), sizeof(sbuf) - strlen(sbuf), " "); |
| 196 | for (k = 0; k < 16; k++) |
| 197 | if (count + k < len) { |
| 198 | ch = isprint(buf[count + k]) ? |
| 199 | buf[count + k] : '.'; |
| 200 | snprintf(sbuf + strlen(sbuf), |
| 201 | sizeof(sbuf) - strlen(sbuf), "%c", ch); |
| 202 | } else |
| 203 | snprintf(sbuf + strlen(sbuf), |
| 204 | sizeof(sbuf) - strlen(sbuf), " "); |
| 205 | snprintf(sbuf + strlen(sbuf), |
| 206 | sizeof(sbuf) - strlen(sbuf), "\n"); |
| 207 | write(1, sbuf, strlen(sbuf)); |
| 208 | } |
| 209 | ch = '\n'; |
| 210 | write(1, &ch, 1); |
| 211 | } |
| 212 | |
| 213 | /* |
| 214 | * Display usage and exit |
| 215 | */ |
| 216 | static void |
| 217 | Usage(void) |
| 218 | { |
| 219 | errx(EX_USAGE, "usage: nghook [-da] path [hookname]"); |
| 220 | } |
| 221 | |