-/* 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_AFTER (1<<3)
#define FLAG_NL (1<<4)
#define FLAG_IGNORE_COMMAS (1<<5)
+#define FLAG_PERIODIC_WAKEUP (1<<6)
#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;
}
if (flags & FLAG_FORMAT_HEX) {
- char hex[3];
-
- memset(hex, 0, sizeof(hex));
-
CHECK_AVAIL(len);
CHECK_SPACE(len*2);
for (i = 0; i < len; i++) {
- if (snprintf(hex, sizeof(hex), "%02X", **inpos) != 2) {
- fprintf(stderr, "Can't format hex-string!\n");
- return 0;
- }
- *inpos += 1;
- memcpy(*outpos, hex, 2);
- *outpos += 2;
+ **outpos = nibble[((**inpos) & 0xf0) >> 4];
+ *outpos += 1;
+ **outpos = nibble[((**inpos) & 0xf)];
+ *inpos += 1; *outpos += 1;
}
} else {
CHECK_AVAIL(len);
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;
- char hex[3];
-
- memset(hex, 0, sizeof(hex));
if (flags & FLAG_LENGTH_BYTE) {
int len = 0;
CHECK_SPACE(1);
CHECK_AVAIL(2);
- memcpy(hex, *inpos, 2);
- *inpos += 2;
- **outpos = strtoul(hex, NULL, 16);
- *outpos += 1;
+ **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)
+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));
outpos = out;
hexdump(buf, buf_len, "Unknown> ");
break;
}
- write(fd, out, outpos-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;
- uint8_t buf[1024];
+ 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) {
- memset(out, 0, sizeof(out));
- for (i = 0; i < r; i++) {
- if ((buf[i] == 0x0a) ||
- (buf[i] == 0x0d)) {
- r = i;
- break;
+ 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;
- if (r == 0)
- return 1;
-
- out[0] = buf[0];
- outpos = out+1;
- inpos = buf+1;
-
- switch(buf[0]) {
- case 'S':
- parse_part_in(&inpos, (r-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0);
- parse_part_in(&inpos, (r-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0);
- parse_part_in(&inpos, (r-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0);
- parse_part_in(&inpos, (r-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0);
- parse_part_in(&inpos, (r-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0);
- parse_part_in(&inpos, (r-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
- break;
- default:
- parse_part_in(&inpos, (r-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
- break;
- }
+ last = inend - inpos;
+
+ for (i = 0; i < last; i++) {
+ if ((inpos[i] == '\r') || (inpos[i] == '\n')) {
+ last = i;
+ break;
+ }
+ }
- hmcfgusb_send(dev, out, outpos-out, 1);
+ 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);
+ }
} else if (r < 0) {
perror("read");
return r;
return 1;
}
-static int comm(int fd_in, int fd_out, int master_socket)
+static int comm(int fd_in, int fd_out, int master_socket, int flags)
{
struct hmcfgusb_dev *dev;
+ uint8_t out[0x40]; //FIXME!!!
+ int poll_timeout = 3600;
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");
}
}
- hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
+ if (flags & FLAG_PERIODIC_WAKEUP)
+ poll_timeout = 1;
+
+ memset(out, 0, sizeof(out));
+ out[0] = 'K';
+ hmcfgusb_send(dev, out, sizeof(out), 1);
while(!quit) {
int fd;
- fd = hmcfgusb_poll(dev, 3600);
+ fd = hmcfgusb_poll(dev, poll_timeout);
if (fd >= 0) {
if (fd == master_socket) {
int client;
if (errno) {
perror("hmcfgusb_poll");
quit = 1;
+ } else {
+ /* periodically wakeup the device */
+ hmcfgusb_send_null_frame(dev);
}
}
}
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);
+ comm(client, client, sock, flags);
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;
}
-static int interactive_server(void)
+static int interactive_server(int flags)
{
- if (!comm(STDIN_FILENO, STDOUT_FILENO, -1))
+ if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags))
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-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-R\twakeup the device (and USB-bus) every second (fix for e.g. Raspberry Pi)\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:Rl: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 'R':
+ flags |= FLAG_PERIODIC_WAKEUP;
+ 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(flags);
+ } else {
+ return socket_server(iface, port, flags);
+ }
}
projects / hmcfgusb / blobdiff