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16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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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 $
51 #include <sys/types.h>
52 #include <sys/socket.h>
53 #include <sys/select.h>
57 #define DEFAULT_HOOKNAME "debug"
58 #define NG_SOCK_HOOK_NAME "hook"
60 #define BUF_SIZE (64 * 1024)
62 static void WriteAscii(u_char * buf, int len);
63 static void Usage(void);
69 main(int ac, char *av[])
71 struct ngm_connect ngc;
72 const char *path = NULL, *hook = DEFAULT_HOOKNAME;
78 while ((ch = getopt(ac, av, "da")) != -1) {
81 NgSetDebug(NgSetDebug(-1) + 1);
107 if (NgMkSockNode(NULL, &csock, &dsock) < 0)
108 errx(EX_OSERR, "can't get sockets");
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);
115 if (NgSendMsg(csock, ".",
116 NGM_GENERIC_COOKIE, NGM_CONNECT, &ngc, sizeof(ngc)) < 0)
117 errx(EX_OSERR, "can't connect to node");
126 FD_SET(dsock, &rfds);
128 /* Wait for something to happen */
129 if (select(FD_SETSIZE, &rfds, NULL, NULL, NULL) < 0)
130 err(EX_OSERR, "select");
132 /* Check data from socket */
133 if (FD_ISSET(dsock, &rfds)) {
137 /* Read packet from socket */
138 if ((rl = NgRecvData(dsock,
139 buf, sizeof(buf), NULL)) < 0)
140 err(EX_OSERR, "read(hook)");
142 errx(EX_OSERR, "read EOF from hook?!");
144 /* Write packet to stdout */
146 WriteAscii((u_char *) buf, rl);
147 else if ((wl = write(1, buf, rl)) != rl) {
149 err(EX_OSERR, "write(stdout)");
152 "stdout: read %d, wrote %d",
158 /* Check data from stdin */
159 if (FD_ISSET(0, &rfds)) {
163 /* Read packet from stdin */
164 if ((rl = read(0, buf, sizeof(buf))) < 0)
165 err(EX_OSERR, "read(stdin)");
167 errx(EX_OSERR, "EOF(stdin)");
169 /* Write packet to socket */
170 if (NgSendData(dsock, NG_SOCK_HOOK_NAME, buf, rl) < 0)
171 err(EX_OSERR, "write(hook)");
177 * Dump data in hex and ASCII form
180 WriteAscii(u_char *buf, int len)
185 for (count = 0; count < len; count += 16) {
186 snprintf(sbuf, sizeof(sbuf), "%04x: ", count);
187 for (k = 0; k < 16; k++)
189 snprintf(sbuf + strlen(sbuf),
190 sizeof(sbuf) - strlen(sbuf),
191 "%02x ", buf[count + k]);
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);
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));
214 * Display usage and exit
219 errx(EX_USAGE, "usage: nghook [-da] path [hookname]");