[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 <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 void 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);

	if (buf_len < 1)
		return;

	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;
	}
	write(fd, out, outpos-out);
	if (debug)
		fprintf(stderr, "LAN < %s\n", out);
}

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 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);
		}
	}

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