[hmcfgusb] / hmland.c

/* HM-CFG-LAN emulation for HM-CFG-USB
 *
 * Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <poll.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <libusb-1.0/libusb.h>

#include "hexdump.h"
#include "hmcfgusb.h"

extern char *optarg;

static int impersonate_hmlanif = 0;
static int debug = 0;
static int verbose = 0;

#define	FLAG_LENGTH_BYTE	(1<<0)
#define	FLAG_FORMAT_HEX		(1<<1)
#define	FLAG_COMMA_BEFORE	(1<<2)
#define	FLAG_COMMA_AFTER	(1<<3)
#define	FLAG_NL			(1<<4)
#define	FLAG_IGNORE_COMMAS	(1<<5)

#define CHECK_SPACE(x)		if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
#define CHECK_AVAIL(x)		if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }

static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags)
{
	const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		'A', 'B', 'C', 'D', 'E', 'F'};
	uint8_t *buf_out = *outpos;
	uint8_t *outend = *outpos + outlen;
	uint8_t *inend = *inpos + inlen;
	int i;

	if (flags & FLAG_COMMA_BEFORE) {
		CHECK_SPACE(1);
		**outpos=',';
		*outpos += 1;
	}

	if (flags & FLAG_LENGTH_BYTE) {
		CHECK_AVAIL(1);
		len = **inpos;
		*inpos += 1;
	}

	if (flags & FLAG_FORMAT_HEX) {
		CHECK_AVAIL(len);
		CHECK_SPACE(len*2);
		for (i = 0; i < len; i++) {
			**outpos = nibble[((**inpos) & 0xf0) >> 4];
			*outpos += 1;
			**outpos = nibble[((**inpos) & 0xf)];
			*inpos += 1; *outpos += 1;
		}
	} else {
		CHECK_AVAIL(len);
		CHECK_SPACE(len);
		memcpy(*outpos, *inpos, len);
		*outpos += len;
		*inpos += len;
	}

	if (flags & FLAG_COMMA_AFTER) {
		CHECK_SPACE(1);
		**outpos=',';
		*outpos += 1;
	}

	if (flags & FLAG_NL) {
		CHECK_SPACE(2);
		**outpos='\r';
		*outpos += 1;
		**outpos='\n';
		*outpos += 1;
	}

	return *outpos - buf_out;
}

static uint8_t ascii_to_nibble(uint8_t a)
{
	uint8_t c = 0x00;

	if ((a >= '0') && (a <= '9')) {
		c = a - '0';
	} else if ((a >= 'A') && (a <= 'F')) {
		c = (a - 'A') + 10;
	} else if ((a >= 'a') && (a <= 'f')) {
		c = (a - 'a') + 10;
	}

	return c;
}

static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags)
{
	uint8_t *buf_out = *outpos;
	uint8_t *outend = *outpos + outlen;
	uint8_t *inend = *inpos + inlen;

	if (flags & FLAG_LENGTH_BYTE) {
		int len = 0;
		uint8_t *ip;

		ip = *inpos;
		while(ip < inend) {
			if (*ip == ',') {
				ip++;
				if (!(flags & FLAG_IGNORE_COMMAS))
					break;

				continue;
			}
			len++;
			ip++;
		}
		CHECK_SPACE(1);
		**outpos = (len / 2);
		*outpos += 1;
	}

	while(*inpos < inend) {
		if (**inpos == ',') {
			*inpos += 1;
			if (!(flags & FLAG_IGNORE_COMMAS))
				break;

			continue;
		}

		CHECK_SPACE(1);
		CHECK_AVAIL(2);

		**outpos = ascii_to_nibble(**inpos) << 4;
		*inpos += 1;
		**outpos |= ascii_to_nibble(**inpos);
		*inpos += 1; *outpos += 1;
	}

	return *outpos - buf_out;
}

static int hmlan_format_out(uint8_t *buf, int buf_len, void *data)
{
	uint8_t out[1024];
	uint8_t *outpos;
	uint8_t *inpos;
	int fd = *((int*)data);
	int w;

	if (buf_len < 1)
		return 1;

	memset(out, 0, sizeof(out));
	outpos = out;
	inpos = buf;

	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
	switch(buf[0]) {
		case 'H':
			if (impersonate_hmlanif) {
				buf[5] = 'L';
				buf[6] = 'A';
				buf[7] = 'N';
			}
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);

			break;
		case 'E':
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);

			break;
		case 'R':
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);

			break;
		case 'I':
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);

			break;
		default:
			format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
			hexdump(buf, buf_len, "Unknown> ");
			break;
	}
	if (debug)
		fprintf(stderr, "LAN < %s\n", out);

	w = write(fd, out, outpos-out);
	if (w <= 0) {
		perror("write");
		return 0;
	}

	return 1;
}

static int hmlan_parse_in(int fd, void *data)
{
	struct hmcfgusb_dev *dev = data;
	uint8_t buf[1025];
	uint8_t out[0x40]; //FIXME!!!
	uint8_t *outpos;
	uint8_t *inpos;
	int i;
	int last;
	int r;

	memset(buf, 0, sizeof(buf));

	r = read(fd, buf, sizeof(buf)-1);
	if (r > 0) {
		uint8_t *inend = buf + r;

		inpos = buf;

		if (debug)
			fprintf(stderr, "\nLAN > %s", buf);

		while (inpos < inend) {
			uint8_t *instart = inpos;

			if ((*inpos == '\r') || (*inpos == '\n')) {
				inpos++;
				continue;
			}
			
			outpos = out;

			last = inend - inpos;

			for (i = 0; i < last; i++) {
				if ((inpos[i] == '\r') || (inpos[i] == '\n')) {
					last = i;
					break;
				}
			}

			if (last == 0)
				continue;

			memset(out, 0, sizeof(out));
			*outpos++ = *inpos++;

			switch(buf[0]) {
				case 'S':
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
					break;
				default:
					parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
					break;
			}

			hmcfgusb_send(dev, out, sizeof(out), 1);
		}
	} else if (r < 0) {
		perror("read");
		return r;
	} else {
		return 0;
	}

	return 1;
}

static int comm(int fd_in, int fd_out, int master_socket)
{
	struct hmcfgusb_dev *dev;
	int quit = 0;

	hmcfgusb_set_debug(debug);

	dev = hmcfgusb_init(hmlan_format_out, &fd_out);
	if (!dev) {
		fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
		return 0;
	}

	if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
		fprintf(stderr, "Can't add client to pollfd!\n");
		hmcfgusb_close(dev);
		return 0;
	}

	if (master_socket >= 0) {
		if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
			fprintf(stderr, "Can't add master_socket to pollfd!\n");
			hmcfgusb_close(dev);
			return 0;
		}
	}

	hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);

	while(!quit) {
		int fd;

		fd = hmcfgusb_poll(dev, 3600);
		if (fd >= 0) {
			if (fd == master_socket) {
				int client;

				client = accept(master_socket, NULL, 0);
				if (client >= 0) {
					shutdown(client, SHUT_RDWR);
					close(client);
				}
			} else {
				if (hmlan_parse_in(fd, dev) <= 0) {
					quit = 1;
				}
			}
		} else if (fd == -1) {
			if (errno) {
				perror("hmcfgusb_poll");
				quit = 1;
			}
		}
	}

	hmcfgusb_close(dev);
	return 1;
}

static int socket_server(int port, int daemon)
{
	struct sigaction sact;
	struct sockaddr_in sin;
	int sock;
	int n;
	pid_t pid;

	if (daemon) {
		pid = fork();
		if (pid > 0) {
			printf("Daemon with PID %u started!\n", pid);
			exit(EXIT_SUCCESS);
		} else if (pid < 0) {
			perror("fork");
			exit(EXIT_FAILURE);
		}
	}

	memset(&sact, 0, sizeof(sact));
	sact.sa_handler = SIG_IGN;

	if (sigaction(SIGPIPE, &sact, NULL) == -1) {
		perror("sigaction");
		exit(EXIT_FAILURE);
	}

	impersonate_hmlanif = 1;

	sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (sock == -1) {
		perror("Can't open socket");
		return EXIT_FAILURE;
	}

	n = 1;
	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
		perror("Can't set socket options");
		return EXIT_FAILURE;
	}

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

	if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
		perror("Can't bind socket");
		return EXIT_FAILURE;
	}

	if (listen(sock, 1) == -1) {
		perror("Can't listen on socket");
		return EXIT_FAILURE;
	}

	while(1) {
		struct sockaddr_in csin;
		socklen_t csinlen;
		int client;
		in_addr_t client_addr;

		memset(&csin, 0, sizeof(csin));
		csinlen = sizeof(csin);
		client = accept(sock, (struct sockaddr*)&csin, &csinlen);
		if (client == -1) {
			perror("Couldn't accept client");
			continue;
		}

		/* FIXME: getnameinfo... */
		client_addr = ntohl(csin.sin_addr.s_addr);

		if (verbose) {
			printf("Client %d.%d.%d.%d connected!\n",
					(client_addr & 0xff000000) >> 24,
					(client_addr & 0x00ff0000) >> 16,
					(client_addr & 0x0000ff00) >> 8,
					(client_addr & 0x000000ff));
		}

		comm(client, client, sock);

		shutdown(client, SHUT_RDWR);
		close(client);

		if (verbose) {
			printf("Connection to %d.%d.%d.%d closed!\n",
					(client_addr & 0xff000000) >> 24,
					(client_addr & 0x00ff0000) >> 16,
					(client_addr & 0x0000ff00) >> 8,
					(client_addr & 0x000000ff));
		}

	}

	return EXIT_SUCCESS;
}

static int interactive_server(void)
{
	if (!comm(STDIN_FILENO, STDOUT_FILENO, -1))
		return EXIT_FAILURE;

	return EXIT_SUCCESS;
}

void hmlan_syntax(char *prog)
{
	fprintf(stderr, "Syntax: %s options\n\n", prog);
	fprintf(stderr, "Possible options:\n");
	fprintf(stderr, "\t-D\tdebug mode\n");
	fprintf(stderr, "\t-d\tdaemon mode\n");
	fprintf(stderr, "\t-h\tthis help\n");
	fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n");
	fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n");
	fprintf(stderr, "\t-v\tverbose mode\n");

}

int main(int argc, char **argv)
{
	int port = 1000;
	int interactive = 0;
	int daemon = 0;
	char *ep;
	int opt;

	while((opt = getopt(argc, argv, "Ddhip:v")) != -1) {
		switch (opt) {
			case 'D':
				debug = 1;
				verbose = 1;
				break;
			case 'd':
				daemon = 1;
				break;
			case 'i':
				interactive = 1;
				break;
			case 'p':
				port = strtoul(optarg, &ep, 10);
				if (*ep != '\0') {
					fprintf(stderr, "Can't parse port!\n");
					exit(EXIT_FAILURE);
				}
				break;
			case 'v':
				verbose = 1;
				break;
			case 'h':
			case ':':
			case '?':
			default:
				hmlan_syntax(argv[0]);
				exit(EXIT_FAILURE);
				break;
		}
	}
	
	if (interactive) {
		return interactive_server();
	} else {
		return socket_server(port, daemon);
	}
}
Commit	Line	Data
4732a863	1	/* HM-CFG-LAN emulation for HM-CFG-USB
9db2e455 MG	2	*
	3	* Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining a copy
	6	* of this software and associated documentation files (the "Software"), to
	7	* deal in the Software without restriction, including without limitation the
	8	* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
	9	* sell copies of the Software, and to permit persons to whom the Software is
	10	* furnished to do so, subject to the following conditions:
	11	*
	12	* The above copyright notice and this permission notice shall be included in
	13	* all copies or substantial portions of the Software.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	16	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	18	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	19	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	20	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	21	* IN THE SOFTWARE.
	22	*/
	23
	24	#include <stdio.h>
	25	#include <stdlib.h>
	26	#include <unistd.h>
	27	#include <stdint.h>
	28	#include <string.h>
	29	#include <strings.h>
	30	#include <poll.h>
4371275b	31	#include <signal.h>
9db2e455	32	#include <errno.h>
e0a7146e MG	33	#include <sys/types.h>
	34	#include <sys/socket.h>
	35	#include <netinet/in.h>
	36	#include <arpa/inet.h>
9db2e455 MG	37	#include <libusb-1.0/libusb.h>
	38
	39	#include "hexdump.h"
	40	#include "hmcfgusb.h"
	41
627e3f33 MG	42	extern char *optarg;
627e3f33 MG	43
e0a7146e	44	static int impersonate_hmlanif = 0;
627e3f33 MG	45	static int debug = 0;
627e3f33 MG	46	static int verbose = 0;
e0a7146e	47
e75295bb MG	48	#define FLAG_LENGTH_BYTE (1<<0)
	49	#define FLAG_FORMAT_HEX (1<<1)
	50	#define FLAG_COMMA_BEFORE (1<<2)
	51	#define FLAG_COMMA_AFTER (1<<3)
	52	#define FLAG_NL (1<<4)
	53	#define FLAG_IGNORE_COMMAS (1<<5)
	54
	55	#define CHECK_SPACE(x) if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
	56	#define CHECK_AVAIL(x) if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }
	57
	58	static int format_part_out(uint8_t inpos, int inlen, uint8_t outpos, int outlen, int len, int flags)
	59	{
51d4ece6 MG	60	const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
51d4ece6 MG	61	'A', 'B', 'C', 'D', 'E', 'F'};
e75295bb MG	62	uint8_t buf_out = outpos;
	63	uint8_t outend = outpos + outlen;
	64	uint8_t inend = inpos + inlen;
	65	int i;
	66
	67	if (flags & FLAG_COMMA_BEFORE) {
	68	CHECK_SPACE(1);
	69	**outpos=',';
	70	*outpos += 1;
	71	}
	72
	73	if (flags & FLAG_LENGTH_BYTE) {
	74	CHECK_AVAIL(1);
	75	len = **inpos;
	76	*inpos += 1;
	77	}
	78
	79	if (flags & FLAG_FORMAT_HEX) {
e75295bb MG	80	CHECK_AVAIL(len);
	81	CHECK_SPACE(len*2);
	82	for (i = 0; i < len; i++) {
51d4ece6 MG	83	outpos = nibble[((inpos) & 0xf0) >> 4];
	84	*outpos += 1;
	85	outpos = nibble[((inpos) & 0xf)];
	86	inpos += 1; outpos += 1;
e75295bb MG	87	}
	88	} else {
	89	CHECK_AVAIL(len);
	90	CHECK_SPACE(len);
	91	memcpy(outpos, inpos, len);
	92	*outpos += len;
	93	*inpos += len;
	94	}
	95
	96	if (flags & FLAG_COMMA_AFTER) {
	97	CHECK_SPACE(1);
	98	**outpos=',';
	99	*outpos += 1;
	100	}
	101
	102	if (flags & FLAG_NL) {
	103	CHECK_SPACE(2);
	104	**outpos='\r';
	105	*outpos += 1;
	106	**outpos='\n';
	107	*outpos += 1;
	108	}
	109
	110	return *outpos - buf_out;
	111	}
	112
51d4ece6 MG	113	static uint8_t ascii_to_nibble(uint8_t a)
	114	{
	115	uint8_t c = 0x00;
	116
	117	if ((a >= '0') && (a <= '9')) {
	118	c = a - '0';
	119	} else if ((a >= 'A') && (a <= 'F')) {
	120	c = (a - 'A') + 10;
	121	} else if ((a >= 'a') && (a <= 'f')) {
	122	c = (a - 'a') + 10;
	123	}
	124
	125	return c;
	126	}
	127
e75295bb MG	128	static int parse_part_in(uint8_t inpos, int inlen, uint8_t outpos, int outlen, int flags)
	129	{
	130	uint8_t buf_out = outpos;
	131	uint8_t outend = outpos + outlen;
	132	uint8_t inend = inpos + inlen;
e75295bb MG	133
	134	if (flags & FLAG_LENGTH_BYTE) {
	135	int len = 0;
	136	uint8_t *ip;
	137
	138	ip = *inpos;
	139	while(ip < inend) {
	140	if (*ip == ',') {
	141	ip++;
	142	if (!(flags & FLAG_IGNORE_COMMAS))
	143	break;
	144
	145	continue;
	146	}
	147	len++;
	148	ip++;
	149	}
	150	CHECK_SPACE(1);
	151	**outpos = (len / 2);
	152	*outpos += 1;
	153	}
	154
	155	while(*inpos < inend) {
	156	if (**inpos == ',') {
	157	*inpos += 1;
	158	if (!(flags & FLAG_IGNORE_COMMAS))
	159	break;
	160
	161	continue;
	162	}
	163
	164	CHECK_SPACE(1);
	165	CHECK_AVAIL(2);
e75295bb	166
51d4ece6 MG	167	outpos = ascii_to_nibble(inpos) << 4;
	168	*inpos += 1;
	169	outpos \|= ascii_to_nibble(inpos);
	170	inpos += 1; outpos += 1;
e75295bb MG	171	}
	172
	173	return *outpos - buf_out;
	174	}
	175
4371275b	176	static int hmlan_format_out(uint8_t buf, int buf_len, void data)
9db2e455	177	{
e75295bb MG	178	uint8_t out[1024];
	179	uint8_t *outpos;
	180	uint8_t *inpos;
e0a7146e	181	int fd = ((int)data);
4371275b	182	int w;
9db2e455 MG	183
9db2e455 MG	184	if (buf_len < 1)
4371275b	185	return 1;
9db2e455	186
e0a7146e	187	memset(out, 0, sizeof(out));
e75295bb MG	188	outpos = out;
e75295bb MG	189	inpos = buf;
e0a7146e	190
e75295bb	191	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
9db2e455 MG	192	switch(buf[0]) {
9db2e455 MG	193	case 'H':
e0a7146e MG	194	if (impersonate_hmlanif) {
	195	buf[5] = 'L';
	196	buf[6] = 'A';
	197	buf[7] = 'N';
	198	}
e75295bb MG	199	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
	200	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	201	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE \| FLAG_LENGTH_BYTE);
	202	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	203	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	204	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	205	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE \| FLAG_NL);
9db2e455 MG	206
	207	break;
	208	case 'E':
e75295bb MG	209	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
	210	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	211	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	212	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	213	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	214	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE \| FLAG_LENGTH_BYTE \| FLAG_NL);
	215
9db2e455 MG	216	break;
9db2e455 MG	217	case 'R':
e75295bb MG	218	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
	219	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	220	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	221	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	222	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	223	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE \| FLAG_LENGTH_BYTE \| FLAG_NL);
	224
9db2e455 MG	225	break;
9db2e455 MG	226	case 'I':
e75295bb MG	227	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
	228	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	229	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE);
	230	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX \| FLAG_COMMA_BEFORE \| FLAG_NL);
	231
	232	break;
9db2e455	233	default:
e75295bb	234	format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX \| FLAG_NL);
9db2e455 MG	235	hexdump(buf, buf_len, "Unknown> ");
	236	break;
	237	}
627e3f33 MG	238	if (debug)
627e3f33 MG	239	fprintf(stderr, "LAN < %s\n", out);
4371275b MG	240
	241	w = write(fd, out, outpos-out);
	242	if (w <= 0) {
	243	perror("write");
	244	return 0;
	245	}
	246
	247	return 1;
9db2e455 MG	248	}
9db2e455 MG	249
e0a7146e	250	static int hmlan_parse_in(int fd, void *data)
9db2e455 MG	251	{
9db2e455 MG	252	struct hmcfgusb_dev *dev = data;
627e3f33	253	uint8_t buf[1025];
e75295bb MG	254	uint8_t out[0x40]; //FIXME!!!
	255	uint8_t *outpos;
	256	uint8_t *inpos;
9db2e455	257	int i;
627e3f33	258	int last;
9db2e455 MG	259	int r;
9db2e455 MG	260
627e3f33 MG	261	memset(buf, 0, sizeof(buf));
	262
	263	r = read(fd, buf, sizeof(buf)-1);
9db2e455	264	if (r > 0) {
627e3f33 MG	265	uint8_t *inend = buf + r;
	266
	267	inpos = buf;
	268
	269	if (debug)
e2572b06	270	fprintf(stderr, "\nLAN > %s", buf);
627e3f33 MG	271
	272	while (inpos < inend) {
	273	uint8_t *instart = inpos;
	274
	275	if ((inpos == '\r') \|\| (inpos == '\n')) {
	276	inpos++;
	277	continue;
9db2e455	278	}
627e3f33 MG	279
627e3f33 MG	280	outpos = out;
9db2e455	281
627e3f33 MG	282	last = inend - inpos;
	283
	284	for (i = 0; i < last; i++) {
	285	if ((inpos[i] == '\r') \|\| (inpos[i] == '\n')) {
	286	last = i;
	287	break;
	288	}
	289	}
	290
	291	if (last == 0)
	292	continue;
	293
	294	memset(out, 0, sizeof(out));
	295	outpos++ = inpos++;
	296
	297	switch(buf[0]) {
	298	case 'S':
	299	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	300	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	301	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	302	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	303	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
	304	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
	305	break;
	306	default:
	307	parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
	308	break;
	309	}
e75295bb	310
33df13be	311	hmcfgusb_send(dev, out, sizeof(out), 1);
627e3f33	312	}
9db2e455 MG	313	} else if (r < 0) {
9db2e455 MG	314	perror("read");
e0a7146e MG	315	return r;
	316	} else {
	317	return 0;
9db2e455	318	}
e0a7146e MG	319
e0a7146e MG	320	return 1;
9db2e455 MG	321	}
9db2e455 MG	322
e0a7146e	323	static int comm(int fd_in, int fd_out, int master_socket)
9db2e455 MG	324	{
	325	struct hmcfgusb_dev *dev;
	326	int quit = 0;
	327
627e3f33 MG	328	hmcfgusb_set_debug(debug);
627e3f33 MG	329
e0a7146e	330	dev = hmcfgusb_init(hmlan_format_out, &fd_out);
9db2e455 MG	331	if (!dev) {
9db2e455 MG	332	fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
e0a7146e MG	333	return 0;
	334	}
	335
	336	if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
	337	fprintf(stderr, "Can't add client to pollfd!\n");
	338	hmcfgusb_close(dev);
	339	return 0;
9db2e455 MG	340	}
9db2e455 MG	341
e0a7146e MG	342	if (master_socket >= 0) {
	343	if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
	344	fprintf(stderr, "Can't add master_socket to pollfd!\n");
	345	hmcfgusb_close(dev);
	346	return 0;
	347	}
9db2e455 MG	348	}
	349
	350	hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
	351
	352	while(!quit) {
	353	int fd;
	354
	355	fd = hmcfgusb_poll(dev, 3600);
	356	if (fd >= 0) {
e0a7146e MG	357	if (fd == master_socket) {
	358	int client;
	359
	360	client = accept(master_socket, NULL, 0);
	361	if (client >= 0) {
	362	shutdown(client, SHUT_RDWR);
	363	close(client);
	364	}
	365	} else {
	366	if (hmlan_parse_in(fd, dev) <= 0) {
	367	quit = 1;
	368	}
	369	}
9db2e455 MG	370	} else if (fd == -1) {
	371	if (errno) {
	372	perror("hmcfgusb_poll");
	373	quit = 1;
	374	}
	375	}
	376	}
	377
813afd12	378	hmcfgusb_close(dev);
e0a7146e MG	379	return 1;
	380	}
	381
627e3f33	382	static int socket_server(int port, int daemon)
e0a7146e	383	{
4371275b	384	struct sigaction sact;
e0a7146e MG	385	struct sockaddr_in sin;
	386	int sock;
	387	int n;
627e3f33 MG	388	pid_t pid;
	389
	390	if (daemon) {
	391	pid = fork();
	392	if (pid > 0) {
	393	printf("Daemon with PID %u started!\n", pid);
	394	exit(EXIT_SUCCESS);
	395	} else if (pid < 0) {
	396	perror("fork");
	397	exit(EXIT_FAILURE);
	398	}
	399	}
e0a7146e	400
4371275b MG	401	memset(&sact, 0, sizeof(sact));
	402	sact.sa_handler = SIG_IGN;
	403
	404	if (sigaction(SIGPIPE, &sact, NULL) == -1) {
	405	perror("sigaction");
27f4063e	406	exit(EXIT_FAILURE);
4371275b MG	407	}
4371275b MG	408
e0a7146e MG	409	impersonate_hmlanif = 1;
	410
	411	sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
	412	if (sock == -1) {
	413	perror("Can't open socket");
	414	return EXIT_FAILURE;
	415	}
	416
	417	n = 1;
	418	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
	419	perror("Can't set socket options");
	420	return EXIT_FAILURE;
	421	}
	422
	423	memset(&sin, 0, sizeof(sin));
	424	sin.sin_family = AF_INET;
	425	sin.sin_port = htons(port);
	426	sin.sin_addr.s_addr = htonl(INADDR_ANY);
	427
	428	if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
	429	perror("Can't bind socket");
	430	return EXIT_FAILURE;
	431	}
	432
	433	if (listen(sock, 1) == -1) {
	434	perror("Can't listen on socket");
	435	return EXIT_FAILURE;
	436	}
	437
	438	while(1) {
	439	struct sockaddr_in csin;
	440	socklen_t csinlen;
	441	int client;
627e3f33	442	in_addr_t client_addr;
e0a7146e MG	443
	444	memset(&csin, 0, sizeof(csin));
	445	csinlen = sizeof(csin);
	446	client = accept(sock, (struct sockaddr*)&csin, &csinlen);
	447	if (client == -1) {
	448	perror("Couldn't accept client");
	449	continue;
	450	}
	451
627e3f33 MG	452	/* FIXME: getnameinfo... */
	453	client_addr = ntohl(csin.sin_addr.s_addr);
	454
	455	if (verbose) {
	456	printf("Client %d.%d.%d.%d connected!\n",
	457	(client_addr & 0xff000000) >> 24,
	458	(client_addr & 0x00ff0000) >> 16,
	459	(client_addr & 0x0000ff00) >> 8,
	460	(client_addr & 0x000000ff));
	461	}
e0a7146e MG	462
	463	comm(client, client, sock);
	464
	465	shutdown(client, SHUT_RDWR);
	466	close(client);
	467
627e3f33 MG	468	if (verbose) {
	469	printf("Connection to %d.%d.%d.%d closed!\n",
	470	(client_addr & 0xff000000) >> 24,
	471	(client_addr & 0x00ff0000) >> 16,
	472	(client_addr & 0x0000ff00) >> 8,
	473	(client_addr & 0x000000ff));
	474	}
e0a7146e MG	475
	476	}
	477
	478	return EXIT_SUCCESS;
	479	}
	480
	481	static int interactive_server(void)
	482	{
	483	if (!comm(STDIN_FILENO, STDOUT_FILENO, -1))
	484	return EXIT_FAILURE;
9db2e455 MG	485
	486	return EXIT_SUCCESS;
	487	}
e0a7146e	488
627e3f33 MG	489	void hmlan_syntax(char *prog)
	490	{
	491	fprintf(stderr, "Syntax: %s options\n\n", prog);
	492	fprintf(stderr, "Possible options:\n");
	493	fprintf(stderr, "\t-D\tdebug mode\n");
	494	fprintf(stderr, "\t-d\tdaemon mode\n");
	495	fprintf(stderr, "\t-h\tthis help\n");
	496	fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n");
	497	fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n");
	498	fprintf(stderr, "\t-v\tverbose mode\n");
	499
	500	}
	501
e0a7146e MG	502	int main(int argc, char **argv)
e0a7146e MG	503	{
627e3f33 MG	504	int port = 1000;
	505	int interactive = 0;
	506	int daemon = 0;
	507	char *ep;
	508	int opt;
	509
	510	while((opt = getopt(argc, argv, "Ddhip:v")) != -1) {
	511	switch (opt) {
	512	case 'D':
	513	debug = 1;
	514	verbose = 1;
	515	break;
	516	case 'd':
	517	daemon = 1;
	518	break;
	519	case 'i':
	520	interactive = 1;
	521	break;
	522	case 'p':
	523	port = strtoul(optarg, &ep, 10);
	524	if (*ep != '\0') {
	525	fprintf(stderr, "Can't parse port!\n");
	526	exit(EXIT_FAILURE);
	527	}
	528	break;
	529	case 'v':
	530	verbose = 1;
	531	break;
	532	case 'h':
	533	case ':':
	534	case '?':
	535	default:
	536	hmlan_syntax(argv[0]);
	537	exit(EXIT_FAILURE);
	538	break;
	539	}
	540	}
	541
	542	if (interactive) {
	543	return interactive_server();
	544	} else {
	545	return socket_server(port, daemon);
	546	}
e0a7146e	547	}