[splice.git] / splice-fromnet.c

/*
 * Splice from network to stdout
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <netdb.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <sys/time.h>
#include <errno.h>
#include <sys/poll.h>

#include "splice.h"

static unsigned int splice_size = SPLICE_SIZE;
static unsigned int splice_flags;
static int wait_for_poll;

static int usage(char *name)
{
	fprintf(stderr, "%s: [-s splice size] [-w wait for poll] [-n non-blocking] port\n", name);
	return 1;
}

static int splice_from_net(int fd)
{
	while (1) {
		int ret;

		if (wait_for_poll) {
			struct pollfd pfd = {
				.fd = fd,
				.events = POLLIN,
			};

			ret = poll(&pfd, 1, -1);
			if (ret < 0)
				return error("poll");
			else if (!ret)
				continue;

			if (!(pfd.revents & POLLIN))
				continue;
		}

		ret = ssplice(fd, NULL, STDOUT_FILENO, NULL, splice_size, 0);

		if (ret < 0)
			return error("splice");
		else if (!ret)
			break;
	}

	return 0;
}

static int get_connect(int fd, struct sockaddr_in *addr)
{
	socklen_t socklen = sizeof(*addr);
	int ret, connfd;

	do {
		struct pollfd pfd = {
			.fd = fd,
			.events = POLLIN,
		};

		ret = poll(&pfd, 1, -1);
		if (ret < 0)
			return error("poll");
		else if (!ret)
			continue;

		connfd = accept(fd, (struct sockaddr *) addr, &socklen);
		if (connfd < 0)
			return error("accept");
		break;
	} while (1);
			
	return connfd;
}

static int parse_options(int argc, char *argv[])
{
	int c, index = 1;

	while ((c = getopt(argc, argv, "s:w:n")) != -1) {
		switch (c) {
		case 's':
			splice_size = atoi(optarg);
			index++;
			break;
		case 'w':
			wait_for_poll = atoi(optarg);
			index++;
			break;
		case 'n':
			splice_flags |= SPLICE_F_NONBLOCK;
			index++;
			break;
		default:
			return -1;
		}
	}

	return index;
}


int main(int argc, char *argv[])
{
	struct sockaddr_in addr;
	unsigned short port;
	int connfd, opt, fd, index;

	if (argc < 2)
		return usage(argv[0]);

	if (check_output_pipe())
		return usage(argv[0]);

	index = parse_options(argc, argv);
	if (index == -1 || index + 1 > argc)
		return usage(argv[0]);

	port = atoi(argv[index]);

	fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (fd < 0)
		return error("socket");

	opt = 1;
	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0)
		return error("setsockopt");

	memset(&addr, 0, sizeof(addr));
	addr.sin_family = AF_INET;
	addr.sin_addr.s_addr = htonl(INADDR_ANY);
	addr.sin_port = htons(port);

	if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
		return error("bind");
	if (listen(fd, 1) < 0)
		return error("listen");

	connfd = get_connect(fd, &addr);
	if (connfd < 0)
		return connfd;

	return splice_from_net(connfd);
}
Commit	Line	Data
beeecb44	1	/*
27e4ade6	2	* Splice from network to stdout
beeecb44 JA	3	*/
	4	#include <stdio.h>
	5	#include <stdlib.h>
	6	#include <unistd.h>
	7	#include <netdb.h>
	8	#include <unistd.h>
	9	#include <fcntl.h>
	10	#include <signal.h>
	11	#include <netinet/in.h>
	12	#include <arpa/inet.h>
	13	#include <string.h>
	14	#include <sys/time.h>
	15	#include <errno.h>
27e4ade6	16	#include <sys/poll.h>
beeecb44 JA	17
	18	#include "splice.h"
	19
0b7e440c	20	static unsigned int splice_size = SPLICE_SIZE;
17d773bd	21	static unsigned int splice_flags;
0b7e440c JA	22	static int wait_for_poll;
0b7e440c JA	23
beeecb44 JA	24	static int usage(char *name)
beeecb44 JA	25	{
17d773bd	26	fprintf(stderr, "%s: [-s splice size] [-w wait for poll] [-n non-blocking] port\n", name);
beeecb44 JA	27	return 1;
	28	}
	29
27e4ade6	30	static int splice_from_net(int fd)
beeecb44	31	{
27e4ade6	32	while (1) {
27e4ade6	33	int ret;
beeecb44	34
0b7e440c JA	35	if (wait_for_poll) {
	36	struct pollfd pfd = {
	37	.fd = fd,
	38	.events = POLLIN,
	39	};
beeecb44	40
0b7e440c JA	41	ret = poll(&pfd, 1, -1);
	42	if (ret < 0)
	43	return error("poll");
	44	else if (!ret)
	45	continue;
	46
	47	if (!(pfd.revents & POLLIN))
	48	continue;
	49	}
beeecb44	50
0b7e440c	51	ret = ssplice(fd, NULL, STDOUT_FILENO, NULL, splice_size, 0);
beeecb44	52
27e4ade6 JA	53	if (ret < 0)
	54	return error("splice");
	55	else if (!ret)
beeecb44	56	break;
27e4ade6	57	}
beeecb44 JA	58
	59	return 0;
	60	}
	61
27e4ade6	62	static int get_connect(int fd, struct sockaddr_in *addr)
beeecb44	63	{
27e4ade6 JA	64	socklen_t socklen = sizeof(*addr);
27e4ade6 JA	65	int ret, connfd;
beeecb44	66
27e4ade6 JA	67	do {
	68	struct pollfd pfd = {
	69	.fd = fd,
	70	.events = POLLIN,
	71	};
	72
	73	ret = poll(&pfd, 1, -1);
	74	if (ret < 0)
	75	return error("poll");
	76	else if (!ret)
	77	continue;
	78
	79	connfd = accept(fd, (struct sockaddr *) addr, &socklen);
	80	if (connfd < 0)
	81	return error("accept");
	82	break;
	83	} while (1);
	84
	85	return connfd;
beeecb44 JA	86	}
beeecb44 JA	87
0b7e440c JA	88	static int parse_options(int argc, char *argv[])
	89	{
	90	int c, index = 1;
	91
17d773bd	92	while ((c = getopt(argc, argv, "s:w:n")) != -1) {
0b7e440c JA	93	switch (c) {
	94	case 's':
	95	splice_size = atoi(optarg);
	96	index++;
	97	break;
	98	case 'w':
	99	wait_for_poll = atoi(optarg);
	100	index++;
	101	break;
17d773bd JA	102	case 'n':
	103	splice_flags \|= SPLICE_F_NONBLOCK;
	104	index++;
	105	break;
0b7e440c JA	106	default:
	107	return -1;
	108	}
	109	}
	110
	111	return index;
	112	}
	113
	114
beeecb44 JA	115	int main(int argc, char *argv[])
	116	{
	117	struct sockaddr_in addr;
	118	unsigned short port;
0b7e440c	119	int connfd, opt, fd, index;
beeecb44	120
27e4ade6	121	if (argc < 2)
beeecb44 JA	122	return usage(argv[0]);
beeecb44 JA	123
27e4ade6	124	if (check_output_pipe())
beeecb44 JA	125	return usage(argv[0]);
beeecb44 JA	126
0b7e440c JA	127	index = parse_options(argc, argv);
	128	if (index == -1 \|\| index + 1 > argc)
	129	return usage(argv[0]);
	130
	131	port = atoi(argv[index]);
beeecb44	132
27e4ade6	133	fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
beeecb44 JA	134	if (fd < 0)
	135	return error("socket");
	136
	137	opt = 1;
	138	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0)
	139	return error("setsockopt");
	140
	141	memset(&addr, 0, sizeof(addr));
27e4ade6	142	addr.sin_family = AF_INET;
beeecb44 JA	143	addr.sin_addr.s_addr = htonl(INADDR_ANY);
	144	addr.sin_port = htons(port);
	145
	146	if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
	147	return error("bind");
beeecb44 JA	148	if (listen(fd, 1) < 0)
	149	return error("listen");
	150
27e4ade6 JA	151	connfd = get_connect(fd, &addr);
	152	if (connfd < 0)
	153	return connfd;
beeecb44	154
27e4ade6	155	return splice_from_net(connfd);
beeecb44	156	}