tmcc.c 5.8 KB
Newer Older
1 2 3 4 5 6 7 8 9
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <errno.h>
#include <syslog.h>
#include <unistd.h>
#include <signal.h>
#include <stdarg.h>
Mike Hibler's avatar
Mike Hibler committed
10 11
#include <stdlib.h>
#include <string.h>
12 13 14
#include <sys/time.h>
#include <time.h>
#include <assert.h>
15 16 17 18
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
19
#include "decls.h"
20
#include "config.h"
21

22 23
#undef BOSSNODE

24
void		sigcatcher(int foo);
25
char		*getbossnode(void);
26

27 28 29 30 31 32 33 34 35 36 37 38 39
char *usagestr = 
 "usage: tmcc [-p #] <command>\n"
 " -p portnum	   Specify a port number to connect to\n"
 "\n";

void
usage()
{
	fprintf(stderr, usagestr);
	exit(1);
}


Mike Hibler's avatar
Mike Hibler committed
40
int
41 42
main(int argc, char **argv)
{
43
	int			sock, data, n, cc, ch, portnum;
Mike Hibler's avatar
Mike Hibler committed
44 45
	struct sockaddr_in	name;
#if 0
46
	struct timeval		tv;
Mike Hibler's avatar
Mike Hibler committed
47
#endif
48 49
	struct hostent		*he;
	struct in_addr		serverip;
Mike Hibler's avatar
Mike Hibler committed
50
	char			buf[MYBUFSIZE], *bp, *response = "";
51
	char			*bossnode;
52
#ifdef UDP
Mike Hibler's avatar
Mike Hibler committed
53
	int			useudp = 0;
54
	void			doudp(int argc, char **argv, struct in_addr);
Mike Hibler's avatar
Mike Hibler committed
55
#endif
56

57 58
	portnum = TBSERVER_PORT;

59
	while ((ch = getopt(argc, argv, "p:u")) != -1)
60 61 62 63
		switch(ch) {
		case 'p':
			portnum = atoi(optarg);
			break;
64 65 66 67 68
#ifdef UDP
		case 'u':
			useudp = 1;
			break;
#endif
69 70 71 72 73
		default:
			usage();
		}

	argc -= optind;
74
	if (argc < 1 || argc > 3) {
75
		usage();
76
	}
77
	argv += optind;
78

79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
	bossnode = getbossnode();
	he = gethostbyname(bossnode);
	if (he)
		memcpy((char *)&serverip, he->h_addr, he->h_length);
	else {
		fprintf(stderr, "gethostbyname(%s) failed\n", bossnode); 
		exit(1);
	}

	/*
	 * Handle built-in "bossinfo" command
	 */
	if (strcmp(argv[0], "bossinfo") == 0) {
		printf("%s %s\n", bossnode, inet_ntoa(serverip));
		exit(0);
	}

96 97
#ifdef UDP
	if (useudp) {
98
		doudp(argc, argv, serverip);
99 100 101 102 103 104 105
		/*
		 * Never returns.
		 */
		abort();
	}
#endif

106 107 108 109 110 111 112 113 114 115
	while (1) {
		/* Create socket from which to read. */
		sock = socket(AF_INET, SOCK_STREAM, 0);
		if (sock < 0) {
			perror("creating stream socket:");
			exit(1);
		}

		/* Create name. */
		name.sin_family = AF_INET;
116
		name.sin_addr   = serverip;
117
		name.sin_port = htons(portnum);
118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141

		if (connect(sock,
			    (struct sockaddr *) &name, sizeof(name)) == 0) {
			break;
		}
		if (errno == ECONNREFUSED) {
			fprintf(stderr, "Connection to TMCD refused "
				"Sleeping a little while ...\n");
			sleep(10);
		}
		else {
			perror("connecting stream socket");
			exit(1);
		}
		close(sock);
	}

	data = 1;
	if (setsockopt(sock, SOL_SOCKET,
		       SO_KEEPALIVE, &data, sizeof(data)) < 0) {
		perror("setsockopt SO_KEEPALIVE");
		close(sock);
		exit(1);
	}
142
#if 0
143 144 145 146
#ifndef linux
	tv.tv_sec  = 30;
	tv.tv_usec = 0;
	if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
147
		perror("setsockopt SO_RCVTIMEO");
148 149 150
		close(sock);
		exit(1);
	}
151
#endif
152
#endif
153 154 155 156
	/*
	 * Since we've gone through a getopt() pass, argv[0] is now the
	 * first argument
	 */
157
	switch(argc) {
158
	case 1:
159
		n = snprintf(buf, sizeof(buf) - 1, "%s", argv[0]);
160 161
		break;
	case 2:
162
		n = snprintf(buf, sizeof(buf) - 1, "%s %s", argv[0], argv[1]);
163 164 165
		break;
	case 3:
		n = snprintf(buf, sizeof(buf) - 1, "%s %s %s",
166
			     argv[0], argv[1], argv[2]);
167 168 169 170 171 172
		break;
	default:
		fprintf(stderr, "Too many command arguments!\n");
		exit(1);
	}
		
173
	if (n >= sizeof(buf)) {
Mike Hibler's avatar
Mike Hibler committed
174
		fprintf(stderr, "Command too large!\n");
175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220
		exit(1);
	}

	/*
	 * Write the command to the socket and wait for the response
	 */
	bp = buf;
	while (n) {
		if ((cc = write(sock, bp, n)) <= 0) {
			if (cc < 0) {
				perror("Writing to socket:");
				exit(1);
			}
			fprintf(stderr, "write aborted");
			exit(1);
		}
		bp += cc;
		n  -= cc;
	}

	while (1) {
		if ((cc = read(sock, buf, sizeof(buf))) <= 0) {
			if (cc < 0) {
				perror("Reading from socket:");
				exit(1);
			}
			break;
		}
		buf[cc] = '\0';
		bp = (char *) malloc(strlen(response) + cc + 1);
		assert(bp);
		strcpy(bp, response);
		strcat(bp, buf);
		response = bp;
	}
	printf("%s", response);

	close(sock);
	exit(0);
}

void
sigcatcher(int foo)
{
}

221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241
#ifndef BOSSNODE
#include <resolv.h>
#endif

char *
getbossnode(void)
{
#ifdef BOSSNODE
	return strdup(BOSSNODE);
#else
	struct hostent *he;

	res_init();
	he = gethostbyaddr((char *)&_res.nsaddr.sin_addr,
			   sizeof(struct in_addr), AF_INET);
	if (he && he->h_name)
		return strdup(he->h_name);
	return("UNKNOWN");
#endif
}

242
#ifdef UDP
Mike Hibler's avatar
Mike Hibler committed
243 244 245 246
/*
 * Not very robust, send a single request, read a single reply. 
 */
void
247
doudp(int argc, char **argv, struct in_addr serverip)
Mike Hibler's avatar
Mike Hibler committed
248 249 250
{
	int			sock, length, n, cc;
	struct sockaddr_in	name, client;
Mike Hibler's avatar
Mike Hibler committed
251
	char			buf[MYBUFSIZE], *bp, *response = "";
Mike Hibler's avatar
Mike Hibler committed
252 253 254 255 256 257 258 259 260 261 262 263 264

	/* Create socket from which to read. */
	sock = socket(AF_INET, SOCK_DGRAM, 0);
	if (sock < 0) {
		perror("creating dgram socket:");
		exit(1);
	}

	/* Create name. */
	name.sin_family = AF_INET;
	name.sin_addr   = serverip;
	name.sin_port = htons(TBSERVER_PORT);

265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
	/*
	 * Since we've gone through a getopt() pass, argv[0] is now the
	 * first argument
	 */
	switch(argc) {
	case 1:
		n = snprintf(buf, sizeof(buf) - 1, "%s", argv[0]);
		break;
	case 2:
		n = snprintf(buf, sizeof(buf) - 1, "%s %s", argv[0], argv[1]);
		break;
	case 3:
		n = snprintf(buf, sizeof(buf) - 1, "%s %s %s",
			     argv[0], argv[1], argv[2]);
		break;
	default:
		fprintf(stderr, "Too many command arguments!\n");
		exit(1);
	}
		
Mike Hibler's avatar
Mike Hibler committed
285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320
	if (n >= sizeof(buf)) {
		fprintf(stderr, "Command too large!\n");
		exit(1);
	}

	/*
	 * Write the command to the socket and wait for the response
	 */
	cc = sendto(sock, buf, n, 0, (struct sockaddr *)&name, sizeof(name));
	if (cc != n) {
		if (cc < 0) {
			perror("Writing to socket:");
			exit(1);
		}
		fprintf(stderr, "short write (%d != %d)\n", cc, n);
		exit(1);
	}

	cc = recvfrom(sock, buf, sizeof(buf), 0,
		      (struct sockaddr *)&client, &length);
	if (cc < 0) {
		perror("Reading from socket:");
		exit(1);
	}
	buf[cc] = '\0';
	bp = (char *) malloc(strlen(response) + cc + 1);
	assert(bp);
	strcpy(bp, response);
	strcat(bp, buf);
	response = bp;
	printf("%s", response);

	close(sock);
	exit(0);
}
#endif