X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/blobdiff_plain/e75295bb20a25fadb04bf8d8162245de85ba1044..d419ace317f5a2505fd7ec735452af9d36a6ec87:/hmland.c diff --git a/hmland.c b/hmland.c index f807164..0ec09a7 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 * @@ -28,9 +28,12 @@ #include #include #include +#include #include #include #include +#include +#include #include #include #include @@ -38,7 +41,13 @@ #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) @@ -52,6 +61,8 @@ static int impersonate_hmlanif = 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; @@ -70,20 +81,13 @@ static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int out } 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); @@ -110,14 +114,26 @@ static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int out 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; @@ -151,25 +167,26 @@ static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outle 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; @@ -222,52 +239,85 @@ static void hmlan_format_out(uint8_t *buf, int buf_len, void *data) 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; + case 'Y': + 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); + 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; @@ -278,11 +328,14 @@ static int hmlan_parse_in(int fd, void *data) 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 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"); @@ -303,12 +356,15 @@ static int comm(int fd_in, int fd_out, int master_socket) } } - hmcfgusb_send(dev, (unsigned char*)"K", 1, 1); + memset(out, 0, sizeof(out)); + out[0] = 'K'; + hmcfgusb_send_null_frame(dev); + hmcfgusb_send(dev, out, sizeof(out), 1); while(!quit) { int fd; - fd = hmcfgusb_poll(dev, 3600); + fd = hmcfgusb_poll(dev, 1); /* Wakeup device/bus at least once a second */ if (fd >= 0) { if (fd == master_socket) { int client; @@ -327,6 +383,9 @@ static int comm(int fd_in, int fd_out, int master_socket) if (errno) { perror("hmcfgusb_poll"); quit = 1; + } else { + /* periodically wakeup the device */ + hmcfgusb_send_null_frame(dev); } } } @@ -335,11 +394,96 @@ static int comm(int fd_in, int fd_out, int master_socket) 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; @@ -358,7 +502,14 @@ static int socket_server(int port) 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"); @@ -374,6 +525,7 @@ static int socket_server(int port) struct sockaddr_in csin; socklen_t csinlen; int client; + in_addr_t client_addr; memset(&csin, 0, sizeof(csin)); csinlen = sizeof(csin); @@ -383,30 +535,111 @@ static int socket_server(int port) continue; } - printf("Client accepted!\n"); + /* FIXME: getnameinfo... */ + client_addr = ntohl(csin.sin_addr.s_addr); - comm(client, client, sock); + 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, 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)); + } + sleep(1); } 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-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': + fprintf(stderr, "-R is no longer needed (1s wakeup is default)\n"); + 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); + } }