-/* HM-CFG-LAN emuldation for HM-CFG-USB
+/* HM-CFG-LAN emulation for HM-CFG-USB
*
* Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
*
#include <string.h>
#include <strings.h>
#include <poll.h>
+#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <libusb-1.0/libusb.h>
#include "hexdump.h"
#include "hmcfgusb.h"
+#define PID_FILE "/var/run/hmland.pid"
+
+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 void hmlan_format_out(uint8_t *buf, int buf_len, void *data)
+static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags)
{
- char out[1024];
- char *pos;
- int fd = *((int*)data);
- int len;
+ 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;
+ return 1;
memset(out, 0, sizeof(out));
- pos = out;
+ outpos = out;
+ inpos = buf;
- *pos++ = buf[0];
+ format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
switch(buf[0]) {
case 'H':
if (impersonate_hmlanif) {
buf[6] = 'A';
buf[7] = 'N';
}
- len = buf[1];
- for (i = 2; i < len + 2; i++) {
- *pos++=buf[i];
- }
- snprintf(pos, 7, ",%02X%02X,", buf[i], buf[i+1]);
- pos += 6;
-
- i += 2;
- len = buf[i]+i+1;
- i++;
- for (; i < len; i++) {
- *pos++=buf[i];
- }
- *pos++=',';
- len = i+12;
- for (; i < len; i++) {
- snprintf(pos, 3, "%02X", buf[i]);
- pos += 2;
-
- switch(len-i) {
- case 10:
- case 7:
- case 3:
- *pos++=',';
- break;
- default:
- break;
- }
- }
+ 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':
- len = 13 + buf[13];
- for (i = 0; i < len; i++) {
- if (i != 12) {
- snprintf(pos, 3, "%02X", buf[i+1]);
- pos += 2;
- }
- switch(i) {
- case 2:
- case 4:
- case 8:
- case 9:
- case 11:
- *pos++=',';
- break;
- default:
- break;
- }
- }
+ 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':
- len = 14 + buf[14];
- for (i = 0; i < len; i++) {
- if (i != 13) {
- snprintf(pos, 3, "%02X", buf[i+1]);
- pos += 2;
- }
- switch(i) {
- case 3:
- case 5:
- case 9:
- case 10:
- case 12:
- *pos++=',';
- break;
- default:
- break;
- }
- }
+ 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':
- //HM> 0x0000: 49 00 00 00 00 55 53 42 2d 49 46 03 bc 0a 4a 45 I....USB-IF...JE
- //HM> 0x0010: 51 30 35 33 35 31 32 32 1d b1 55 68 ea 13 00 14 Q0535122..Uh....
- //HM> 0x0020: 9f a6 00 03 00 00 00 00 00 00 00 00 00 00 00 00 ................
- //HM> 0x0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 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:
- for (i = 1; i < buf_len; i++) {
- snprintf(pos, 3, "%02X", buf[i]);
- pos += 2;
- }
+ 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;
}
- *pos++='\r';
- *pos++='\n';
- write(fd, out, pos-out);
+ 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;
- unsigned char buf[1024];
- unsigned char send_buf[0x40]; //FIXME!!!
- char tmp[3];
+ uint8_t buf[1025];
+ uint8_t out[0x40]; //FIXME!!!
+ uint8_t *outpos;
+ uint8_t *inpos;
int i;
+ int last;
int r;
- r = read(fd, buf, sizeof(buf));
+ memset(buf, 0, sizeof(buf));
+
+ r = read(fd, buf, sizeof(buf)-1);
if (r > 0) {
- int cnt;
+ uint8_t *inend = buf + r;
- memset(send_buf, 0, sizeof(send_buf));
- for (i = 0; i < r; i++) {
- if ((buf[i] == 0x0a) ||
- (buf[i] == 0x0d)) {
- r = i;
- break;
+ 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;
- send_buf[0] = buf[0];
-
- cnt = 0;
- for (i = 1; i < r; i++) {
- if (buf[i] == ',') {
- switch (buf[0]) {
- case 'S':
- if (cnt == 4) {
- /* Add msg length */
- memmove(buf+i+2, buf+i+1, r-(i+1));
- snprintf(tmp, 3, "%02X", (int)((r-(i+1))/2));
- memcpy(buf+i, tmp, 2);
- r++;
- break;
- }
- default:
- memmove(buf+i, buf+i+1, r-(i+1));
- r--;
- break;
+ for (i = 0; i < last; i++) {
+ if ((inpos[i] == '\r') || (inpos[i] == '\n')) {
+ last = i;
+ break;
}
- cnt++;
}
- }
- memset(tmp, 0, sizeof(tmp));
- for (i = 1; i < r; i+=2) {
- memcpy(tmp, buf + i, 2);
- send_buf[1+(i/2)] = strtoul(tmp, NULL, 16);
+ if (last == 0)
+ continue;
+
+ memset(out, 0, sizeof(out));
+ *outpos++ = *inpos++;
+
+ switch(*instart) {
+ 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);
}
- hmcfgusb_send(dev, send_buf, 1+(i/2), 1);
} else if (r < 0) {
perror("read");
return r;
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 1;
}
-static int socket_server(int port)
+void sigterm_handler(int sig)
+{
+ if (unlink(PID_FILE) == -1)
+ perror("Can't remove PID file");
+
+ exit(EXIT_SUCCESS);
+}
+
+#define FLAG_DAEMON (1 << 0)
+#define FLAG_PID_FILE (1 << 1)
+
+static int socket_server(char *iface, int port, int flags)
{
+ struct sigaction sact;
struct sockaddr_in sin;
int sock;
int n;
+ pid_t pid;
+
+ if (flags & FLAG_DAEMON) {
+ FILE *pidfile = NULL;
+
+ if (flags & FLAG_PID_FILE) {
+ int fd;
+
+ fd = open(PID_FILE, O_CREAT | O_EXCL | O_WRONLY, 0644);
+ if (fd == -1) {
+ if (errno == EEXIST) {
+ pid_t old_pid;
+ pidfile = fopen(PID_FILE, "r");
+ if (!pidfile) {
+ perror("PID file " PID_FILE " already exists, already running?");
+ exit(EXIT_FAILURE);
+ }
+
+ if (fscanf(pidfile, "%u", &old_pid) != 1) {
+ fclose(pidfile);
+ fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n");
+ exit(EXIT_FAILURE);
+ }
+
+ fclose(pidfile);
+
+ fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid);
+ exit(EXIT_FAILURE);
+ }
+ perror("Can't create PID file " PID_FILE);
+ exit(EXIT_FAILURE);
+ }
+
+ pidfile = fdopen(fd, "w");
+ if (!pidfile) {
+ perror("Can't reopen PID file fd");
+ exit(EXIT_FAILURE);
+ }
+
+ memset(&sact, 0, sizeof(sact));
+ sact.sa_handler = sigterm_handler;
+
+ if (sigaction(SIGTERM, &sact, NULL) == -1) {
+ perror("sigaction(SIGTERM)");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ pid = fork();
+ if (pid > 0) {
+ if (pidfile) {
+ fprintf(pidfile, "%u\n", pid);
+ fclose(pidfile);
+ }
+
+ printf("Daemon with PID %u started!\n", pid);
+ exit(EXIT_SUCCESS);
+ } else if (pid < 0) {
+ perror("fork");
+ exit(EXIT_FAILURE);
+ }
+
+ if (pidfile)
+ fclose(pidfile);
+ }
+
+ memset(&sact, 0, sizeof(sact));
+ sact.sa_handler = SIG_IGN;
+
+ if (sigaction(SIGPIPE, &sact, NULL) == -1) {
+ perror("sigaction(SIGPIPE)");
+ exit(EXIT_FAILURE);
+ }
impersonate_hmlanif = 1;
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
- sin.sin_addr.s_addr = htonl(INADDR_ANY);
+ if (!iface) {
+ sin.sin_addr.s_addr = htonl(INADDR_ANY);
+ } else {
+ if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
+ perror("inet_ntop");
+ return EXIT_FAILURE;
+ }
+ }
if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
perror("Can't bind socket");
struct sockaddr_in csin;
socklen_t csinlen;
int client;
+ in_addr_t client_addr;
memset(&csin, 0, sizeof(csin));
csinlen = sizeof(csin);
continue;
}
- printf("Client accepted!\n");
+ /* 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);
- printf("Connection closed!\n");
+ 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;
}
+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-l ip\tlisten on given IP address only (for example 127.0.0.1)\n");
+ fprintf(stderr, "\t-P\tcreate PID file " PID_FILE " in daemon mode\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)
{
- //return interactive_server();
- return socket_server(1234);
+ int port = 1000;
+ char *iface = NULL;
+ int interactive = 0;
+ int flags = 0;
+ char *ep;
+ int opt;
+
+ while((opt = getopt(argc, argv, "DdhiPp:l:v")) != -1) {
+ switch (opt) {
+ case 'D':
+ debug = 1;
+ verbose = 1;
+ break;
+ case 'd':
+ flags |= FLAG_DAEMON;
+ break;
+ case 'i':
+ interactive = 1;
+ break;
+ case 'P':
+ flags |= FLAG_PID_FILE;
+ break;
+ case 'p':
+ port = strtoul(optarg, &ep, 10);
+ if (*ep != '\0') {
+ fprintf(stderr, "Can't parse port!\n");
+ exit(EXIT_FAILURE);
+ }
+ break;
+ case 'l':
+ iface = optarg;
+ 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(iface, port, flags);
+ }
}
projects / hmcfgusb / blobdiff