diff options
Diffstat (limited to 'libexec/getty/main.c')
| -rw-r--r-- | libexec/getty/main.c | 53 |
1 files changed, 49 insertions, 4 deletions
diff --git a/libexec/getty/main.c b/libexec/getty/main.c index 3edf338..5f6c2de 100644 --- a/libexec/getty/main.c +++ b/libexec/getty/main.c @@ -39,7 +39,7 @@ static char copyright[] = #ifndef lint /*static char sccsid[] = "from: @(#)main.c 8.1 (Berkeley) 6/20/93";*/ -static char rcsid[] = "$Id: main.c,v 1.9 1996/05/05 19:01:10 joerg Exp $"; +static char rcsid[] = "$Id: main.c,v 1.10 1996/05/07 16:42:26 ache Exp $"; #endif /* not lint */ #include <sys/param.h> @@ -78,6 +78,16 @@ static char rcsid[] = "$Id: main.c,v 1.9 1996/05/05 19:01:10 joerg Exp $"; #undef CTRL #define CTRL(x) (x&037) +/* defines for auto detection of incoming PPP calls (->PAP/CHAP) */ + +#define PPP_FRAME 0x7e /* PPP Framing character */ +#define PPP_STATION 0xff /* "All Station" character */ +#define PPP_ESCAPE 0x7d /* Escape Character */ +#define PPP_CONTROL 0x03 /* PPP Control Field */ +#define PPP_CONTROL_ESCAPED 0x23 /* PPP Control Field, escaped */ +#define PPP_LCP_HI 0xc0 /* LCP protocol - high byte */ +#define PPP_LCP_LOW 0x21 /* LCP protocol - low byte */ + struct termios tmode, omode; int crmod, digit, lower, upper; @@ -172,6 +182,7 @@ main(argc, argv) const char *tname; int repcnt = 0, failopenlogged = 0; struct rlimit limit; + int rval; signal(SIGINT, SIG_IGN); signal(SIGQUIT, SIG_IGN); @@ -293,7 +304,11 @@ main(argc, argv) signal(SIGALRM, dingdong); alarm(TO); } - if (getname()) { + if ((rval = getname()) == 2) { + execle(PP, "ppplogin", ttyn, (char *) 0, env); + syslog(LOG_ERR, "%s: %m", PP); + exit(1); + } else if (rval) { register int i; oflush(); @@ -345,7 +360,9 @@ getname() { register int c; register char *np; - char cs; + unsigned char cs; + int ppp_state; + int ppp_connection = 0; /* * Interrupt may happen if we use CBREAK mode @@ -374,6 +391,34 @@ getname() exit(0); if ((c = cs&0177) == 0) return (0); + + /* PPP detection state machine.. + Look for sequences: + PPP_FRAME, PPP_STATION, PPP_ESCAPE, PPP_CONTROL_ESCAPED or + PPP_FRAME, PPP_STATION, PPP_CONTROL (deviant from RFC) + See RFC1662. + Derived from code from Michael Hancock, <michaelh@cet.co.jp> + and Erik 'PPP' Olson, <eriko@wrq.com> + */ + + if (PP && (cs == PPP_FRAME)) { + ppp_state = 1; + } else if (ppp_state == 1 && cs == PPP_STATION) { + ppp_state = 2; + } else if (ppp_state == 2 && cs == PPP_ESCAPE) { + ppp_state = 3; + } else if ((ppp_state == 2 && cs == PPP_CONTROL) + || (ppp_state == 3 && cs == PPP_CONTROL_ESCAPED)) { + ppp_state = 4; + } else if (ppp_state == 4 && cs == PPP_LCP_HI) { + ppp_state = 5; + } else if (ppp_state == 5 && cs == PPP_LCP_LOW) { + ppp_connection = 1; + break; + } else { + ppp_state = 0; + } + if (c == EOT || c == CTRL('d')) exit(1); if (c == '\r' || c == '\n' || np >= &name[sizeof name]) { @@ -418,7 +463,7 @@ getname() for (np = name; *np; np++) if (isupper(*np)) *np = tolower(*np); - return (1); + return (1 + ppp_connection); } static void |
