X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/blobdiff_plain/813afd1296fd1ead02d4292705831e10dd3fcf5d..e6ab46311df1302b261d5cd509d8737c558e4a98:/hmland.c diff --git a/hmland.c b/hmland.c index 3366c8b..f3353f6 100644 --- a/hmland.c +++ b/hmland.c @@ -1,4 +1,4 @@ -/* HM-CFG-LAN emuldation for HM-CFG-USB +/* HM-CFG-LAN emulation for HM-CFG-USB * * Copyright (c) 2013 Michael Gernoth * @@ -28,176 +28,327 @@ #include #include #include +#include #include +#include +#include +#include +#include +#include +#include #include #include "hexdump.h" #include "hmcfgusb.h" -void hmlan_format_out(uint8_t *buf, int buf_len, void *data) +#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 int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags) { - 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)); + outpos = out; + inpos = buf; - //FIXME: Buffer here and write to fd_out - printf("%c", buf[0]); + format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0); switch(buf[0]) { case 'H': - buf[5]='L'; - buf[6]='A'; - buf[7]='N'; - len = buf[1]; - for (i = 2; i < len + 2; i++) { - printf("%c", buf[i]); - } - printf(",%02X%02X,", buf[i], - buf[i+1]); - i+=2; - len = buf[i]+i+1; - i++; - for (; i < len; i++) { - printf("%c", buf[i]); - } - printf(","); - len = i+12; - for (; i < len; i++) { - printf("%02X", buf[i]); - switch(len-i) { - case 10: - case 7: - case 3: - printf(","); - break; - default: - break; - } + 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': - len = 13 + buf[13]; - for (i = 0; i < len; i++) { - if (i != 12) - printf("%02X", buf[1+i]); - switch(i) { - case 2: - case 4: - case 8: - case 9: - case 11: - printf(","); - 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) - printf("%02X", buf[1+i]); - switch(i) { - case 3: - case 5: - case 9: - case 10: - case 12: - printf(","); - 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++) - printf("%02X", buf[i]); + 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; } - printf("\n"); + if (debug) + fprintf(stderr, "LAN < %s\n", out); + + w = write(fd, out, outpos-out); + if (w <= 0) { + perror("write"); + return 0; + } + + return 1; } -void hmlan_parse_in(int fd, void *data) +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(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); } - hmcfgusb_send(dev, send_buf, 1+(i/2), 1); } else if (r < 0) { perror("read"); + return r; + } else { + return 0; } + + return 1; } -int main(int argc, char **argv) +static int comm(int fd_in, int fd_out, int master_socket) { struct hmcfgusb_dev *dev; int quit = 0; - dev = hmcfgusb_init(hmlan_format_out, NULL); + hmcfgusb_set_debug(debug); + + dev = hmcfgusb_init(hmlan_format_out, &fd_out); if (!dev) { fprintf(stderr, "Can't initialize HM-CFG-USB!\n"); - exit(EXIT_FAILURE); + return 0; } - if (!hmcfgusb_add_pfd(dev, STDIN_FILENO, POLLIN)) { - fprintf(stderr, "Can't add stdin to pollfd!\n"); - exit(EXIT_FAILURE); + 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); @@ -207,7 +358,19 @@ int main(int argc, char **argv) fd = hmcfgusb_poll(dev, 3600); if (fd >= 0) { - hmlan_parse_in(fd, dev); + 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"); @@ -217,6 +380,252 @@ int main(int argc, char **argv) } hmcfgusb_close(dev); + return 1; +} + +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; + + 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); + 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"); + 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-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) +{ + 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); + } +}