297 lines
8.1 KiB
C
297 lines
8.1 KiB
C
#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/un.h>
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#include <netdb.h>
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#include <signal.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#define LINELEN 2048
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static char Buffer[LINELEN], Command[LINELEN];
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static int Usage()
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{
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fprintf(stderr, "Usage: pppctl [-v] [ -t n ] [ -p passwd ] Port|LocalSock command[;command]...\n");
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fprintf(stderr, " -v tells pppctl to output all conversation\n");
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fprintf(stderr, " -t n specifies a timeout of n seconds (default 2)\n");
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fprintf(stderr, " -p passwd specifies your password\n");
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return 1;
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}
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static int TimedOut = 0;
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void Timeout(int Sig)
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{
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TimedOut = 1;
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}
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#define REC_PASSWD (1)
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#define REC_SHOW (2)
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#define REC_VERBOSE (4)
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static char *passwd;
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int Receive(int fd, unsigned TimeoutVal, int display)
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{
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int Result;
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struct sigaction act, oact;
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int len;
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char *last;
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TimedOut = 0;
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if (TimeoutVal) {
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act.sa_handler = Timeout;
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sigemptyset(&act.sa_mask);
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act.sa_flags = 0;
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sigaction(SIGALRM, &act, &oact);
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alarm(TimeoutVal);
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}
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len = 0;
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while (Result = read(fd, Buffer+len, sizeof(Buffer)-len-1), Result != -1) {
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len += Result;
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Buffer[len] = '\0';
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if (TimedOut) {
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if (display & REC_VERBOSE)
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write(1,Buffer,len);
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Result = -1;
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break;
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} else if (len > 2 && !strcmp(Buffer+len-2, "> ")) {
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if (display & (REC_SHOW|REC_VERBOSE)) {
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if (display & REC_VERBOSE)
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last = Buffer+len-1;
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else
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last = rindex(Buffer, '\n');
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if (last) {
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*++last = '\0';
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write(1, Buffer, last-Buffer);
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}
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}
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for (last = Buffer+len-2; last > Buffer && *last != ' '; last--)
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;
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if (last > Buffer+3 && !strncmp(last-3, " on", 3)) {
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/* a password is required ! */
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if (display & REC_PASSWD) {
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if (TimeoutVal) {
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alarm(0);
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sigaction(SIGALRM, &oact, 0);
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}
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/* password time */
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if (!passwd)
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passwd = getpass("Password: ");
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sprintf(Buffer, "passwd %s\n", passwd);
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bzero(passwd, strlen(passwd));
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if (display & REC_VERBOSE)
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write(1, Buffer, strlen(Buffer));
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write(fd, Buffer, strlen(Buffer));
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bzero(Buffer, strlen(Buffer));
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return Receive(fd, TimeoutVal, display & ~REC_PASSWD);
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}
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Result = 1;
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} else
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Result = 0;
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break;
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}
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}
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if (TimedOut)
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Result = -1;
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if (TimeoutVal) {
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alarm(0);
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sigaction(SIGALRM, &oact, 0);
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}
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return Result;
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}
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int
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main(int argc, char **argv)
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{
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struct servent *s;
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struct hostent *h;
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struct sockaddr *sock;
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struct sockaddr_in ifsin;
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struct sockaddr_un ifsun;
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int socksz, arg, fd, len, verbose;
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unsigned TimeoutVal;
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char *DoneWord = "x", *next, *start;
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struct sigaction act, oact;
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verbose = 0;
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TimeoutVal = 2;
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for (arg = 1; arg < argc; arg++)
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if (*argv[arg] == '-') {
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for (start = argv[arg] + 1; *start; start++)
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switch (*start) {
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case 't':
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TimeoutVal = (unsigned)atoi
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(start[1] ? start + 1 : argv[++arg]);
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start = DoneWord;
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break;
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case 'v':
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verbose = REC_VERBOSE;
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break;
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case 'p':
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passwd = (start[1] ? start + 1 : argv[++arg]);
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start = DoneWord;
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break;
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default:
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return Usage();
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}
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}
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else
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break;
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if (argc < arg + 2)
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return Usage();
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if (*argv[arg] == '/') {
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sock = (struct sockaddr *)&ifsun;
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socksz = sizeof ifsun;
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ifsun.sun_len = strlen(argv[arg]);
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if (ifsun.sun_len > sizeof ifsun.sun_path - 1) {
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fprintf(stderr, "%s: Path too long\n", argv[arg]);
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return 1;
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}
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ifsun.sun_family = AF_LOCAL;
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strcpy(ifsun.sun_path, argv[arg]);
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if (fd = socket(AF_LOCAL, SOCK_STREAM, 0), fd < 0) {
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fprintf(stderr, "Cannot create local domain socket\n");
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return 2;
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}
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} else {
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char *port, *host, *colon;
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int hlen;
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colon = strchr(argv[arg], ':');
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if (colon) {
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port = colon + 1;
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*colon = '\0';
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host = argv[arg];
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} else {
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port = argv[arg];
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host = "127.0.0.1";
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}
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sock = (struct sockaddr *)&ifsin;
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socksz = sizeof ifsin;
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hlen = strlen(host);
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if (strspn(host, "0123456789.") == hlen) {
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if (!inet_aton(host, (struct in_addr *)&ifsin.sin_addr.s_addr)) {
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fprintf(stderr, "Cannot translate %s\n", host);
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return 1;
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}
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} else if ((h = gethostbyname(host)) == 0) {
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fprintf(stderr, "Cannot resolve %s\n", host);
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return 1;
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}
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else
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ifsin.sin_addr.s_addr = *(u_long *)h->h_addr_list[0];
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if (colon)
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*colon = ':';
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if (strspn(port, "0123456789") == strlen(port))
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ifsin.sin_port = htons(atoi(port));
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else if (s = getservbyname(port, "tcp"), !s) {
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fprintf(stderr, "%s isn't a valid port or service!\n", port);
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return Usage();
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}
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else
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ifsin.sin_port = s->s_port;
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ifsin.sin_len = sizeof(ifsin);
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ifsin.sin_family = AF_INET;
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if (fd = socket(AF_INET, SOCK_STREAM, 0), fd < 0) {
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fprintf(stderr, "Cannot create internet socket\n");
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return 2;
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}
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}
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TimedOut = 0;
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if (TimeoutVal) {
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act.sa_handler = Timeout;
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sigemptyset(&act.sa_mask);
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act.sa_flags = 0;
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sigaction(SIGALRM, &act, &oact);
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alarm(TimeoutVal);
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}
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if (connect(fd, sock, socksz) < 0) {
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if (TimeoutVal) {
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alarm(0);
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sigaction(SIGALRM, &oact, 0);
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}
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if (TimedOut)
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fputs("Timeout: ", stderr);
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fprintf(stderr, "Cannot connect to socket %s\n", argv[arg]);
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close(fd);
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return 3;
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}
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if (TimeoutVal) {
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alarm(0);
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sigaction(SIGALRM, &oact, 0);
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}
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len = 0;
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Command[sizeof(Command)-1] = '\0';
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for (arg++; arg < argc; arg++) {
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if (len && len < sizeof(Command)-1)
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strcpy(Command+len++, " ");
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strncpy(Command+len, argv[arg], sizeof(Command)-len-1);
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len += strlen(Command+len);
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}
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switch (Receive(fd, TimeoutVal, verbose | REC_PASSWD))
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{
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case 1:
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fprintf(stderr, "Password incorrect\n");
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break;
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case 0:
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start = Command;
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do {
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next = index(start, ';');
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while (*start == ' ' || *start == '\t')
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start++;
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if (next)
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*next = '\0';
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strcpy(Buffer, start);
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Buffer[sizeof(Buffer)-2] = '\0';
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strcat(Buffer, "\n");
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if (verbose)
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write(1, Buffer, strlen(Buffer));
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write(fd, Buffer, strlen(Buffer));
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if (Receive(fd, TimeoutVal, verbose | REC_SHOW) != 0) {
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fprintf(stderr, "No reply from ppp\n");
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break;
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}
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if (next)
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start = ++next;
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} while (next && *next);
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if (verbose)
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puts("");
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break;
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default:
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fprintf(stderr, "ppp is not responding\n");
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break;
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}
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close(fd);
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return 0;
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}
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