X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-linux.c;h=455d74a7e764eeadf17f007b0a892b4ec2b6b693;hp=9f04976e5b810139a04228e73a8b8e4bf2b68853;hb=2a09df9e052a1e395d7864ff5865fdea94cadfa3;hpb=225af82e3d41bbf2833486a01b0a0db2d67a3844 diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c index 9f04976..455d74a 100644 --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c @@ -42,7 +42,7 @@ #include #include #include -#include +#include #include #include #include @@ -59,14 +59,18 @@ static struct termios inittermios; /* Initial TTY termios */ int sockfd; /* socket for doing interface ioctls */ -static int driver_version = 0; +static int driver_version = 0; static int driver_modification = 0; -static int driver_patch = 0; +static int driver_patch = 0; static char *lock_file; #define MAX_IFS 32 +#define FLAGS_GOOD (IFF_UP | IFF_BROADCAST) +#define FLAGS_MASK (IFF_UP | IFF_BROADCAST | \ + IFF_POINTOPOINT | IFF_LOOPBACK | IFF_NOARP) + /* * SET_SA_FAMILY - set the sa_family field of a struct sockaddr, * if it exists. @@ -76,90 +80,137 @@ static char *lock_file; memset ((char *) &(addr), '\0', sizeof(addr)); \ addr.sa_family = (family); +/* + * Functions to read and set the flags value in the device driver + */ + +int get_flags (void) + { + int flags; + + if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) + { + syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m"); + quit(); + } + + MAINDEBUG ((LOG_DEBUG, "get flags = %x\n", flags)); + return flags; + } + +void set_flags (int flags) + { + MAINDEBUG ((LOG_DEBUG, "set flags = %x\n", flags)); + if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0) + { + syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS, %x): %m", flags); + quit(); + } + } + /* * sys_init - System-dependent initialization. */ void sys_init(void) -{ + { openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP); setlogmask(LOG_UPTO(LOG_INFO)); if (debug) + { setlogmask(LOG_UPTO(LOG_DEBUG)); - - /* Get an internet socket for doing socket ioctl's on. */ - if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { + } + + /* Get an internet socket for doing socket ioctls. */ + sockfd = socket(AF_INET, SOCK_DGRAM, 0); + if (sockfd < 0) + { syslog(LOG_ERR, "Couldn't create IP socket: %m"); die(1); - } -} + } + } /* * note_debug_level - note a change in the debug level. */ + void note_debug_level (void) -{ - if (debug) { - syslog(LOG_INFO, "Debug turned ON, Level %d", debug); + { + if (debug) + { + MAINDEBUG ((LOG_INFO, "Debug turned ON, Level %d", debug)); setlogmask(LOG_UPTO(LOG_DEBUG)); - } else { + } + else + { setlogmask(LOG_UPTO(LOG_WARNING)); - } -} + } + } /* * set_kdebugflag - Define the debugging level for the kernel */ int set_kdebugflag (int requested_level) -{ - if (ioctl(fd, PPPIOCGDEBUG, &prev_kdebugflag) < 0) { + { + if (ioctl(fd, PPPIOCGDEBUG, &prev_kdebugflag) < 0) + { syslog(LOG_ERR, "ioctl(PPPIOCGDEBUG): %m"); return (0); - } - - if (prev_kdebugflag != requested_level) { - if (ioctl(fd, PPPIOCSDEBUG, &requested_level) < 0) { + } + + if (prev_kdebugflag != requested_level) + { + if (ioctl(fd, PPPIOCSDEBUG, &requested_level) < 0) + { syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m"); return (0); - } - syslog(LOG_INFO, "set kernel debugging level to %d", requested_level); - } + } + MAINDEBUG ((LOG_INFO, "set kernel debugging level to %d", requested_level)); + } return (1); -} + } /* * establish_ppp - Turn the serial port into a ppp interface. */ void establish_ppp (void) -{ + { int pppdisc = N_PPP; int sig = SIGIO; - if (ioctl(fd, TIOCEXCL, 0) < 0) { + if (ioctl(fd, TIOCEXCL, 0) < 0) + { syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m"); - } - - if (ioctl(fd, TIOCGETD, &initdisc) < 0) { + } + + if (ioctl(fd, TIOCGETD, &initdisc) < 0) + { syslog(LOG_ERR, "ioctl(TIOCGETD): %m"); die (1); - } + } - if (ioctl(fd, TIOCSETD, &pppdisc) < 0) { + if (ioctl(fd, TIOCSETD, &pppdisc) < 0) + { syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); die (1); - } - if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) { + } + + if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) + { syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m"); die (1); - } - + } + set_kdebugflag (kdebugflag); - syslog (LOG_NOTICE, "Using version %d.%d.%d of PPP driver", - driver_version, driver_modification, driver_patch); -} + set_flags (get_flags() & ~(SC_RCV_B7_0 | SC_RCV_B7_1 | + SC_RCV_EVNP | SC_RCV_ODDP)); + + MAINDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver", + driver_version, driver_modification, driver_patch)); + } /* * disestablish_ppp - Restore the serial port to normal operation. @@ -167,50 +218,73 @@ void establish_ppp (void) */ void disestablish_ppp(void) -{ + { int x; char *s; - - if (initdisc >= 0) { - set_kdebugflag (prev_kdebugflag); - /* - * Check whether the link seems not to be 8-bit clean. - */ - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) { +/* + * Check whether the link seems not to be 8-bit clean. + */ + if (initdisc >= 0) + { + if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) + { s = NULL; - switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) { + switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) + { + case SC_RCV_B7_0 | SC_RCV_B7_1 | SC_RCV_EVNP | SC_RCV_ODDP: + s = "nothing was received"; + break; + case SC_RCV_B7_0: - s = "bit 7 set to 1"; + case SC_RCV_B7_0 | SC_RCV_EVNP: + case SC_RCV_B7_0 | SC_RCV_ODDP: + case SC_RCV_B7_0 | SC_RCV_ODDP | SC_RCV_EVNP: + s = "all had bit 7 set to 1"; break; + case SC_RCV_B7_1: - s = "bit 7 set to 0"; + case SC_RCV_B7_1 | SC_RCV_EVNP: + case SC_RCV_B7_1 | SC_RCV_ODDP: + case SC_RCV_B7_1 | SC_RCV_ODDP | SC_RCV_EVNP: + s = "all had bit 7 set to 0"; break; + case SC_RCV_EVNP: - s = "odd parity"; + s = "all had odd parity"; break; + case SC_RCV_ODDP: - s = "even parity"; + s = "all had even parity"; break; - } - if (s != NULL) { - syslog(LOG_WARNING, "Serial link is not 8-bit clean:"); - syslog(LOG_WARNING, "All received characters had %s", s); - } - } + } + if (s != NULL) + { + syslog(LOG_WARNING, "Receive serial link is not 8-bit clean:"); + syslog(LOG_WARNING, "Problem: %s", s); + } + } + + set_kdebugflag (prev_kdebugflag); + if (ioctl(fd, TIOCSETD, &initdisc) < 0) + { syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); - + } + if (ioctl(fd, TIOCNXCL, 0) < 0) + { syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m"); - + } + initdisc = -1; - } -} + } + } /* * List of valid speeds. */ + struct speed { int speed_int, speed_val; } speeds[] = { @@ -286,275 +360,321 @@ struct speed { /* * Translate from bits/second to a speed_t. */ + int translate_speed (int bps) -{ + { struct speed *speedp; if (bps == 0) - return 0; - for (speedp = speeds; speedp->speed_int; speedp++) - if (bps == speedp->speed_int) - return speedp->speed_val; - syslog(LOG_WARNING, "speed %d not supported", bps); + { + for (speedp = speeds; speedp->speed_int; speedp++) + { + if (bps == speedp->speed_int) + { + return speedp->speed_val; + } + } + syslog(LOG_WARNING, "speed %d not supported", bps); + } return 0; -} + } /* * Translate from a speed_t to bits/second. */ + int baud_rate_of (int speed) -{ + { struct speed *speedp; - - if (speed == 0) - return 0; - for (speedp = speeds; speedp->speed_int; speedp++) - if (speed == speedp->speed_val) - return speedp->speed_int; + + if (speed != 0) + { + for (speedp = speeds; speedp->speed_int; speedp++) + { + if (speed == speedp->speed_val) + { + return speedp->speed_int; + } + } + } return 0; -} + } /* * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity, * at the requested speed, etc. If `local' is true, set CLOCAL * regardless of whether the modem option was specified. */ + void set_up_tty (int fd, int local) -{ + { int speed, x; struct termios tios; - - if (tcgetattr(fd, &tios) < 0) { + + if (tcgetattr(fd, &tios) < 0) + { syslog(LOG_ERR, "tcgetattr: %m"); die(1); - } - + } + if (!restore_term) + { inittermios = tios; - - tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); - if (crtscts == 1) - tios.c_cflag |= CRTSCTS; - else if (crtscts < 0) - tios.c_cflag &= ~CRTSCTS; - - tios.c_cflag |= CS8 | CREAD | HUPCL; - - if (local || !modem) - tios.c_cflag |= CLOCAL; + } + + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); + tios.c_cflag |= CS8 | CREAD | HUPCL; tios.c_iflag = IGNBRK | IGNPAR; tios.c_oflag = 0; tios.c_lflag = 0; tios.c_cc[VMIN] = 1; tios.c_cc[VTIME] = 0; + + if (local || !modem) + { + tios.c_cflag ^= (CLOCAL | HUPCL); + } + + switch (crtscts) + { + case 1: + tios.c_cflag |= CRTSCTS; + break; - if (crtscts == 2) { + case 2: tios.c_iflag |= IXOFF; tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */ tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */ - } + break; + + case -1: + tios.c_cflag &= ~CRTSCTS; + break; + default: + break; + } + speed = translate_speed(inspeed); - if (speed) { - cfsetospeed(&tios, speed); - cfsetispeed(&tios, speed); - } else { + if (speed) + { + cfsetospeed (&tios, speed); + cfsetispeed (&tios, speed); + } +/* + * We can't proceed if the serial port speed is B0, + * since that implies that the serial port is disabled. + */ + else + { speed = cfgetospeed(&tios); - /* - * We can't proceed if the serial port speed is B0, - * since that implies that the serial port is disabled. - */ - if (speed == B0) { + if (speed == B0) + { syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate", devnam); - die(1); - } - } + die (1); + } + } - if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { + if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) + { syslog(LOG_ERR, "tcsetattr: %m"); die(1); - } - - baud_rate = baud_rate_of(speed); + } + + baud_rate = baud_rate_of(speed); restore_term = TRUE; -} + } /* * setdtr - control the DTR line on the serial port. * This is called from die(), so it shouldn't call die(). */ + void setdtr (int fd, int on) -{ + { int modembits = TIOCM_DTR; - ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); -} + ioctl(fd, (on ? TIOCMBIS : TIOCMBIC), &modembits); + } /* * restore_tty - restore the terminal to the saved settings. */ void restore_tty (void) -{ - if (restore_term) { - if (!default_device) { - /* - * Turn off echoing, because otherwise we can get into - * a loop with the tty and the modem echoing to each other. - * We presume we are the sole user of this tty device, so - * when we close it, it will revert to its defaults anyway. - */ + { + if (restore_term) + { + restore_term = 0; +/* + * Turn off echoing, because otherwise we can get into + * a loop with the tty and the modem echoing to each other. + * We presume we are the sole user of this tty device, so + * when we close it, it will revert to its defaults anyway. + */ + if (!default_device) + { inittermios.c_lflag &= ~(ECHO | ECHONL); - } + } + if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) + { if (errno != ENXIO) + { syslog(LOG_WARNING, "tcsetattr: %m"); - restore_term = 0; - } -} + } + } + } + } /* * output - Output PPP packet. */ void output (int unit, unsigned char *p, int len) -{ + { if (unit != 0) + { MAINDEBUG((LOG_WARNING, "output: unit != 0!")); - + } + if (debug) + { log_packet(p, len, "sent "); + } - if (write(fd, p, len) < 0) { + if (write(fd, p, len) < 0) + { syslog(LOG_ERR, "write: %m"); die(1); - } -} + } + } /* * wait_input - wait until there is data available on fd, * for the length of time specified by *timo (indefinite * if timo is NULL). */ + void wait_input (struct timeval *timo) -{ + { fd_set ready; int n; - + FD_ZERO(&ready); FD_SET(fd, &ready); + n = select(fd+1, &ready, NULL, &ready, timo); - if (n < 0 && errno != EINTR) { + if (n < 0 && errno != EINTR) + { syslog(LOG_ERR, "select: %m"); die(1); - } -} + } + } /* * read_packet - get a PPP packet from the serial device. */ int read_packet (unsigned char *buf) -{ + { int len; len = read(fd, buf, PPP_MTU + PPP_HDRLEN); - if (len < 0) { - if (errno == EWOULDBLOCK) { + if (len < 0) + { + if (errno == EWOULDBLOCK) + { return -1; - } + } syslog(LOG_ERR, "read(fd): %m"); die(1); - } + } return len; -} + } /* * ppp_send_config - configure the transmit characteristics of * the ppp interface. */ + void ppp_send_config (int unit,int mtu,u_int32_t asyncmap,int pcomp,int accomp) -{ + { u_int x; struct ifreq ifr; MAINDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu)); strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); ifr.ifr_mtu = mtu; - if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) { + + if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) + { syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m"); quit(); - } - + } + MAINDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap)); - if (ioctl(fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) { + if (ioctl(fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) + { syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m"); quit(); - } + } - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - quit(); - } - + x = get_flags(); x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT; x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC; - - MAINDEBUG ((LOG_DEBUG, "send_config: flags = %x\n", x)); - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - quit(); - } -} + set_flags(x); + } /* * ppp_set_xaccm - set the extended transmit ACCM for the interface. */ + void ppp_set_xaccm (int unit, ext_accm accm) -{ + { MAINDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n", accm[0], accm[1], accm[2], accm[3])); + if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) + { syslog(LOG_WARNING, "ioctl(set extended ACCM): %m"); -} + } + } /* * ppp_recv_config - configure the receive-side characteristics of * the ppp interface. */ + void ppp_recv_config (int unit,int mru,u_int32_t asyncmap,int pcomp,int accomp) -{ + { u_int x; MAINDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru)); if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0) + { syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m"); + } MAINDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap)); - if (ioctl(fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) { + if (ioctl(fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) + { syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m"); quit(); - } - - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - quit(); - } + } + x = get_flags(); x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC; - MAINDEBUG ((LOG_DEBUG, "recv_config: flags = %x\n", x)); - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - quit(); - } -} + set_flags (x); + } /* * ccp_test - ask kernel whether a given compression method * is acceptable for use. */ + int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit) { struct ppp_option_data data; @@ -572,22 +692,10 @@ int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit) void ccp_flags_set (int unit, int isopen, int isup) { - int x; - - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - } - else - { - x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN; - x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP; - - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - } - } + int x = get_flags(); + x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN; + x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP; + set_flags (x); } /* @@ -598,13 +706,8 @@ void ccp_flags_set (int unit, int isopen, int isup) int ccp_fatal_error (int unit) { - int x; + int x = get_flags(); - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m"); - return 0; - } return x & SC_DC_FERROR; } @@ -614,32 +717,21 @@ int ccp_fatal_error (int unit) int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid) { - u_int x; - - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - return 0; - } - - x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP; - x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID; - - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) - { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - return 0; - } + u_int x = get_flags(); if (vjcomp) { if (ioctl (fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - return 0; + vjcomp = 0; } } + x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP; + x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID; + set_flags (x); + return 1; } @@ -818,26 +910,27 @@ static char *path_to_route (void) fp = fopen (MOUNTED, "r"); if (fp != 0) { - while ((mntent = getmntent (fp)) != 0) + mntent = getmntent (fp); + while (mntent != (struct mntent *) 0) { - if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) == 0) + if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) != 0) { - continue; - } - - if (strcmp (mntent->mnt_type, "proc") == 0) - { - strncpy (route_buffer, mntent->mnt_dir, - sizeof (route_buffer)-10); - route_buffer [sizeof (route_buffer)-10] = '\0'; - strcat (route_buffer, "/net/route"); - - fclose (fp); - return (route_buffer); + if (strcmp (mntent->mnt_type, "proc") == 0) + { + strncpy (route_buffer, mntent->mnt_dir, + sizeof (route_buffer)-10); + route_buffer [sizeof (route_buffer)-10] = '\0'; + strcat (route_buffer, "/net/route"); + + fclose (fp); + return (route_buffer); + } } + mntent = getmntent (fp); } fclose (fp); } + syslog (LOG_ERR, "proc file system not mounted"); return 0; } @@ -955,6 +1048,7 @@ static int defaultroute_exists (void) break; } } + close_route_table(); return result; } @@ -1080,6 +1174,7 @@ int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr) syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m"); return 0; } + MAINDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s", ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr))); /* @@ -1103,9 +1198,8 @@ int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr) { continue; } - if ((ifreq.ifr_flags & - (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP)) - != (IFF_UP|IFF_BROADCAST)) + + if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0) { continue; } @@ -1116,9 +1210,11 @@ int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr) { continue; } + mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr; MAINDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx", ip_ntoa(ina), ntohl(mask))); + if (((ipaddr ^ ina) & mask) != 0) { continue; @@ -1164,63 +1260,86 @@ int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr) * network as `addr'. If we find any, we OR in their netmask to the * user-specified netmask. */ -u_int32_t -GetMask(addr) - u_int32_t addr; -{ + +u_int32_t GetMask (u_int32_t addr) + { u_int32_t mask, nmask, ina; struct ifreq *ifr, *ifend, ifreq; struct ifconf ifc; struct ifreq ifs[MAX_IFS]; addr = ntohl(addr); + if (IN_CLASSA(addr)) /* determine network mask for address class */ + { nmask = IN_CLASSA_NET; - else if (IN_CLASSB(addr)) - nmask = IN_CLASSB_NET; + } else - nmask = IN_CLASSC_NET; + { + if (IN_CLASSB(addr)) + { + nmask = IN_CLASSB_NET; + } + else + { + nmask = IN_CLASSC_NET; + } + } + /* class D nets are disallowed by bad_ip_adrs */ mask = netmask | htonl(nmask); - - /* - * Scan through the system's network interfaces. - */ +/* + * Scan through the system's network interfaces. + */ ifc.ifc_len = sizeof(ifs); ifc.ifc_req = ifs; - if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { + if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) + { syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m"); return mask; - } + } + ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); - for (ifr = ifc.ifc_req; ifr < ifend; ifr++) { - /* - * Check the interface's internet address. - */ + for (ifr = ifc.ifc_req; ifr < ifend; ifr++) + { +/* + * Check the interface's internet address. + */ if (ifr->ifr_addr.sa_family != AF_INET) + { continue; + } ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; - if ((ntohl(ina) & nmask) != (addr & nmask)) + if (((ntohl(ina) ^ addr) & nmask) != 0) + { continue; - /* - * Check that the interface is up, and not point-to-point or loopback. - */ + } +/* + * Check that the interface is up, and not point-to-point or loopback. + */ strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) + { continue; - if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK)) - != IFF_UP) + } + + if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0) + { continue; - /* - * Get its netmask and OR it into our mask. - */ + } +/* + * Get its netmask and OR it into our mask. + */ if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) + { continue; + } mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr; - } + break; + } return mask; -} + } /* * Internal routine to decode the version.modification.patch level @@ -1253,6 +1372,64 @@ static void decode_version (char *buf, int *version, } } +/* + * Procedure to determine if the PPP line dicipline is registered. + */ + +int +ppp_registered(void) + { + int local_fd; + int ppp_disc = N_PPP; + int init_disc = -1; + int initfdflags; + + local_fd = open(devnam, O_NONBLOCK | O_RDWR, 0); + if (local_fd < 0) + { + syslog(LOG_ERR, "Failed to open %s: %m", devnam); + return 0; + } + + initfdflags = fcntl(local_fd, F_GETFL); + if (initfdflags == -1) + { + syslog(LOG_ERR, "Couldn't get device fd flags: %m"); + close (local_fd); + return 0; + } + + initfdflags &= ~O_NONBLOCK; + fcntl(local_fd, F_SETFL, initfdflags); +/* + * Read the initial line dicipline and try to put the device into the + * PPP dicipline. + */ + if (ioctl(local_fd, TIOCGETD, &init_disc) < 0) + { + syslog(LOG_ERR, "ioctl(TIOCGETD): %m"); + close (local_fd); + return 0; + } + + if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0) + { + syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); + close (local_fd); + return 0; + } + + if (ioctl(local_fd, TIOCSETD, &init_disc) < 0) + { + syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); + close (local_fd); + return 0; + } + + close (local_fd); + return 1; + } + /* * ppp_available - check whether the system has any ppp interfaces * (in fact we check whether we can do an ioctl on ppp0). @@ -1274,15 +1451,28 @@ int ppp_available(void) strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; +/* + * If the device did not exist then attempt to create one by putting the + * current tty into the PPP discipline. If this works then obtain the + * flags for the device again. + */ + if (!ok) + { + if (ppp_registered()) + { + strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); + ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; + } + } /* * Ensure that the hardware address is for PPP and not something else */ - if (ok != 0) + if (ok) { ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0; } - if (ok != 0 && ifr.ifr_hwaddr.sa_family != ARPHRD_PPP) + if (ok && ifr.ifr_hwaddr.sa_family != ARPHRD_PPP) { ok = 0; } @@ -1290,7 +1480,7 @@ int ppp_available(void) * This is the PPP device. Validate the version of the driver at this * point to ensure that this program will work with the driver. */ - if (ok != 0) + if (ok) { char abBuffer [1024]; int size; @@ -1299,7 +1489,7 @@ int ppp_available(void) size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr); ok = size >= 0; - if (ok != 0) + if (ok) { decode_version (abBuffer, &driver_version, @@ -1308,7 +1498,7 @@ int ppp_available(void) } } - if (ok == 0) + if (!ok) { driver_version = driver_modification = @@ -1334,10 +1524,12 @@ int ppp_available(void) ok = 0; } - if (ok == 0) + if (!ok) { fprintf(stderr, "Sorry - PPP driver version %d.%d.%d is out of date\n", driver_version, driver_modification, driver_patch); + close (s); + exit (1); } close(s); @@ -1380,71 +1572,108 @@ int logwtmp (char *line, char *name, char *host) /* * lock - create a lock file for the named device */ -int -lock(dev) - char *dev; -{ + +int lock (char *dev) + { char hdb_lock_buffer[12]; int fd, pid, n; char *p; - if ((p = strrchr(dev, '/')) != NULL) - dev = p + 1; + p = strrchr(dev, '/'); + if (p != NULL) + { + dev = ++p; + } + lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1); if (lock_file == NULL) + { novm("lock file name"); - strcat(strcpy(lock_file, LOCK_PREFIX), dev); + } + + strcpy (lock_file, LOCK_PREFIX); + strcat (lock_file, dev); +/* + * Attempt to create the lock file at this point. + */ + while (1) + { + fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644); + if (fd >= 0) + { + sprintf(hdb_lock_buffer, "%010d\n", getpid()); + write(fd, hdb_lock_buffer, 11); + close(fd); + return 0; + } +/* + * If the file exists then check to see if the pid is stale + */ + if (errno == EEXIST) + { + fd = open(lock_file, O_RDONLY, 0); + if (fd < 0) + { + if (errno == ENOENT) /* This is just a timing problem. */ + { + continue; + } + break; + } - while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) { - if (errno == EEXIST - && (fd = open(lock_file, O_RDONLY, 0)) >= 0) { /* Read the lock file to find out who has the device locked */ - n = read(fd, hdb_lock_buffer, 11); - if (n > 0) { - hdb_lock_buffer[n] = 0; - sscanf (hdb_lock_buffer, " %d", &pid); - } - if (n <= 0) { + n = read (fd, hdb_lock_buffer, 11); + close (fd); + if (n < 0) + { syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file); - close(fd); - } else { - if (kill(pid, 0) == -1 && errno == ESRCH) { - /* pid no longer exists - remove the lock file */ - if (unlink(lock_file) == 0) { - close(fd); - syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)", - dev, pid); - continue; - } else - syslog(LOG_WARNING, "Couldn't remove stale lock on %s", - dev); - } else - syslog(LOG_NOTICE, "Device %s is locked by pid %d", - dev, pid); - } - close(fd); - } else - syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file); - free(lock_file); - lock_file = NULL; - return -1; - } + break; + } - sprintf(hdb_lock_buffer, "%010d\n", getpid()); - write(fd, hdb_lock_buffer, 11); + if (n == 0) + { + unlink (lock_file); + syslog (LOG_NOTICE, "Removed stale lock on %s", lock_file); + continue; + } - close(fd); - return 0; + hdb_lock_buffer[n] = '\0'; + sscanf (hdb_lock_buffer, " %d", &pid); + + if (kill(pid, 0) == -1 && errno == ESRCH) + { + /* pid no longer exists - remove the lock file */ + if (unlink (lock_file) == 0) + { + syslog (LOG_NOTICE, "Removed stale lock on %s (pid %d)", + dev, pid); + continue; + } + } + + syslog (LOG_NOTICE, "Device %s is locked by pid %d", dev, pid); + break; + } + + syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file); + break; + } + + free(lock_file); + lock_file = NULL; + return -1; } /* * unlock - remove our lockfile */ -unlock() -{ - if (lock_file) { + +void unlock(void) + { + if (lock_file) + { unlink(lock_file); free(lock_file); lock_file = NULL; - } -} + } + }