X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-ultrix.c;h=92cde071d2a7907d72357e5a4b7515a8e063d63f;hp=d1f3cb7823eee5893f5b9a176e619f7b8365ba77;hb=642b44a17f5b83cbfbbbca87d85ec0e4d83762cd;hpb=a199a8fc6621d7e1ca23fdc65091cc605c5feb28 diff --git a/pppd/sys-ultrix.c b/pppd/sys-ultrix.c index d1f3cb7..92cde07 100644 --- a/pppd/sys-ultrix.c +++ b/pppd/sys-ultrix.c @@ -3,6 +3,7 @@ * PPP interfaces on Ultrix systems. * * Copyright (c) 1989 Carnegie Mellon University. + * Copyright (c) 1995 The Australian National University. * All rights reserved. * * Redistribution and use in source and binary forms are permitted @@ -10,50 +11,205 @@ * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed - * by Carnegie Mellon University. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. + * by Carnegie Mellon University and The Australian National University. + * The names of the Universities may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint -static char rcsid[] = "$Id: sys-ultrix.c,v 1.3 1994/05/24 11:26:21 paulus Exp $"; +static char rcsid[] = "$Id: sys-ultrix.c,v 1.18 1996/07/01 01:20:29 paulus Exp $"; #endif /* * TODO: */ +#include +#include #include +#include +#include +#include +#include +#include +#include #include +#include #include #include #include #include +#include #include - +#include #include #include #include #include "pppd.h" -#include "ppp.h" -static int initdisc = -1; /* Initial TTY discipline */ -extern int kdebugflag; +static int initdisc = -1; /* Initial TTY discipline for ppp_fd */ +static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */ +static int ppp_fd = -1; /* fd which is set to PPP discipline */ + +static int restore_term; /* 1 => we've munged the terminal */ +static struct termios inittermios; /* Initial TTY termios */ +static struct winsize wsinfo; /* Initial window size info */ + +static char *lock_file; /* name of lock file created */ + +static int loop_slave = -1; +static int loop_master; +static char loop_name[20]; + +static unsigned char inbuf[512]; /* buffer for chars read from loopback */ + +static int sockfd; /* socket for doing interface ioctls */ + +static int if_is_up; /* the interface is currently up */ +static u_int32_t ifaddrs[2]; /* local and remote addresses */ +static u_int32_t default_route_gateway; /* gateway addr for default route */ +static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */ + +/* Prototypes for procedures local to this file. */ +static int translate_speed __P((int)); +static int baud_rate_of __P((int)); +static int get_ether_addr __P((u_int32_t, struct sockaddr *)); + + +/* + * sys_init - System-dependent initialization. + */ +void +sys_init() +{ + /* Get an internet socket for doing socket ioctl's on. */ + if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { + syslog(LOG_ERR, "Couldn't create IP socket: %m"); + die(1); + } +} + +/* + * sys_cleanup - restore any system state we modified before exiting: + * mark the interface down, delete default route and/or proxy arp entry. + * This should call die() because it's called from die(). + */ +void +sys_cleanup() +{ + struct ifreq ifr; + + if (if_is_up) { + strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0 + && ((ifr.ifr_flags & IFF_UP) != 0)) { + ifr.ifr_flags &= ~IFF_UP; + ioctl(sockfd, SIOCSIFFLAGS, &ifr); + } + } + if (ifaddrs[0]) + cifaddr(0, ifaddrs[0], ifaddrs[1]); + if (default_route_gateway) + cifdefaultroute(0, default_route_gateway); + if (proxy_arp_addr) + cifproxyarp(0, proxy_arp_addr); +} + +/* + * sys_close - Clean up in a child process before execing. + */ +void +sys_close() +{ + close(sockfd); + if (loop_slave >= 0) { + close(loop_slave); + close(loop_master); + } +} + +/* + * sys_check_options - check the options that the user specified + */ +void +sys_check_options() +{ + if (demand) { + fprintf(stderr, + "Sorry - demand-dialling is not supported under Ultrix\n"); + exit(1); + } +} + + +/* + * daemon - Detach us from the terminal session. + */ +int +daemon(nochdir, noclose) + int nochdir, noclose; +{ + int pid; + + if ((pid = fork()) < 0) + return -1; + if (pid != 0) + exit(0); /* parent dies */ + setsid(); + if (!nochdir) + chdir("/"); + if (!noclose) { + fclose(stdin); /* don't need stdin, stdout, stderr */ + fclose(stdout); + fclose(stderr); + } + return 0; +} + +/* + * ppp_available - check whether the system has any ppp interfaces + * (in fact we check whether we can do an ioctl on ppp0). + */ +int +ppp_available() +{ + int s, ok; + struct ifreq ifr; + extern char *no_ppp_msg; + + if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) + return 1; /* can't tell */ + + strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); + ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; + close(s); + + no_ppp_msg = "\ +This system lacks kernel support for PPP. To include PPP support\n\ +in the kernel, please follow the steps detailed in the README.ultrix\n\ +file in the ppp-2.2 distribution.\n"; + return ok; +} /* * establish_ppp - Turn the serial port into a ppp interface. */ void -establish_ppp() +establish_ppp(fd) + int fd; { int pppdisc = PPPDISC; int x; + /* + * Save the old line discipline of fd, and set it to PPP. + */ if (ioctl(fd, TIOCGETD, &initdisc) < 0) { syslog(LOG_ERR, "ioctl(TIOCGETD): %m"); die(1); @@ -71,6 +227,8 @@ establish_ppp() die(1); } + ppp_fd = fd; + /* * Enable debug in the driver if requested. */ @@ -83,47 +241,315 @@ establish_ppp() syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m"); } } + + /* + * Set device for non-blocking reads. + */ + if ((initfdflags = fcntl(fd, F_GETFL)) == -1 + || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { + syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m"); + } } +/* + * restore_loop - reattach the ppp unit to the loopback. + */ +void +restore_loop() +{ +} /* * disestablish_ppp - Restore the serial port to normal operation. * This shouldn't call die() because it's called from die(). */ void -disestablish_ppp() +disestablish_ppp(fd) + int fd; +{ + /* Reset non-blocking mode on fd. */ + if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0) + syslog(LOG_WARNING, "Couldn't restore device fd flags: %m"); + initfdflags = -1; + + /* Restore old line discipline. */ + if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0) + syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); + initdisc = -1; + + if (fd == ppp_fd) + ppp_fd = -1; +} + +/* + * Check whether the link seems not to be 8-bit clean. + */ +void +clean_check() { int x; char *s; - if (initdisc >= 0) { + if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) { + s = NULL; + switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) { + case SC_RCV_B7_0: + s = "bit 7 set to 1"; + break; + case SC_RCV_B7_1: + s = "bit 7 set to 0"; + break; + case SC_RCV_EVNP: + s = "odd parity"; + break; + case SC_RCV_ODDP: + s = "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); + } + } +} + + +/* + * List of valid speeds. + */ +struct speed { + int speed_int, speed_val; +} speeds[] = { +#ifdef B50 + { 50, B50 }, +#endif +#ifdef B75 + { 75, B75 }, +#endif +#ifdef B110 + { 110, B110 }, +#endif +#ifdef B134 + { 134, B134 }, +#endif +#ifdef B150 + { 150, B150 }, +#endif +#ifdef B200 + { 200, B200 }, +#endif +#ifdef B300 + { 300, B300 }, +#endif +#ifdef B600 + { 600, B600 }, +#endif +#ifdef B1200 + { 1200, B1200 }, +#endif +#ifdef B1800 + { 1800, B1800 }, +#endif +#ifdef B2000 + { 2000, B2000 }, +#endif +#ifdef B2400 + { 2400, B2400 }, +#endif +#ifdef B3600 + { 3600, B3600 }, +#endif +#ifdef B4800 + { 4800, B4800 }, +#endif +#ifdef B7200 + { 7200, B7200 }, +#endif +#ifdef B9600 + { 9600, B9600 }, +#endif +#ifdef B19200 + { 19200, B19200 }, +#endif +#ifdef B38400 + { 38400, B38400 }, +#endif +#ifdef EXTA + { 19200, EXTA }, +#endif +#ifdef EXTB + { 38400, EXTB }, +#endif +#ifdef B57600 + { 57600, B57600 }, +#endif +#ifdef B115200 + { 115200, B115200 }, +#endif + { 0, 0 } +}; + +/* + * Translate from bits/second to a speed_t. + */ +int +translate_speed(bps) + 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); + return 0; +} + +/* + * Translate from a speed_t to bits/second. + */ +int +baud_rate_of(speed) + 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; + 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(fd, local) + int fd, local; +{ + int speed, x; + struct termios tios; + + if (tcgetattr(fd, &tios) < 0) { + syslog(LOG_ERR, "tcgetattr: %m"); + die(1); + } + + if (!restore_term) { + inittermios = tios; + ioctl(fd, TIOCGWINSZ, &wsinfo); + } + + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); +#ifdef CRTSCTS + if (crtscts > 0 && !local) + tios.c_cflag |= CRTSCTS; + else if (crtscts < 0) + tios.c_cflag &= ~CRTSCTS; +#endif /* CRTSCTS */ + + tios.c_cflag |= CS8 | CREAD | HUPCL; + if (local || !modem) + tios.c_cflag |= CLOCAL; + tios.c_iflag = IGNBRK | IGNPAR; + tios.c_oflag = 0; + tios.c_lflag = 0; + tios.c_cc[VMIN] = 1; + tios.c_cc[VTIME] = 0; + + if (crtscts == -2) { + tios.c_iflag |= IXON | IXOFF; + tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */ + tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */ + } + + speed = translate_speed(inspeed); + if (speed) { + cfsetospeed(&tios, speed); + cfsetispeed(&tios, speed); + } else { + speed = cfgetospeed(&tios); /* - * Check whether the link seems not to be 8-bit clean. + * We can't proceed if the serial port speed is B0, + * since that implies that the serial port is disabled. */ - 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)) { - case SC_RCV_B7_0: - s = "bit 7 set to 1"; - break; - case SC_RCV_B7_1: - s = "bit 7 set to 0"; - break; - case SC_RCV_EVNP: - s = "odd parity"; - break; - case SC_RCV_ODDP: - s = "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 (speed == B0) { + syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate", + devnam); + die(1); } - if (ioctl(fd, TIOCSETD, &initdisc) < 0) - syslog(LOG_ERR, "ioctl(TIOCSETD): %m"); } + + if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { + syslog(LOG_ERR, "tcsetattr: %m"); + die(1); + } + + x = 0; + if (ioctl(fd, (crtscts > 0 || modem)? TIOCMODEM: TIOCNMODEM, &x) < 0) + syslog(LOG_WARNING, "TIOC(N)MODEM: %m"); + if (ioctl(fd, (local || !modem)? TIOCNCAR: TIOCCAR) < 0) + syslog(LOG_WARNING, "TIOC(N)CAR: %m"); + + baud_rate = inspeed = baud_rate_of(speed); + restore_term = TRUE; +} + +/* + * restore_tty - restore the terminal to the saved settings. + */ +void +restore_tty(fd) + int fd; +{ + 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. + */ + inittermios.c_lflag &= ~(ECHO | ECHONL); + } + if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) + if (errno != ENXIO) + syslog(LOG_WARNING, "tcsetattr: %m"); + ioctl(fd, TIOCSWINSZ, &wsinfo); + restore_term = FALSE; + } +} + +/* + * setdtr - control the DTR line on the serial port. + * This is called from die(), so it shouldn't call die(). + */ +void +setdtr(fd, on) +int fd, on; +{ + int modembits = TIOCM_DTR; + + ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); +} + + +/* + * open_ppp_loopback - open the device we use for getting + * packets in demand mode, and connect it to a ppp interface. + * Here we use would use a pty, except that Ultrix ptys are brain-dead. + */ +void +open_ppp_loopback() +{ + syslog(LOG_ERR, "open_ppp_loopback called!"); + die(1); } @@ -136,13 +562,64 @@ output(unit, p, len) u_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) { - syslog(LOG_ERR, "write: %m"); + if (write(ttyfd, p, len) < 0) { + if (errno != EIO) + syslog(LOG_ERR, "write: %m"); + } +} + + +/* + * wait_input - wait until there is data available on ttyfd, + * for the length of time specified by *timo (indefinite + * if timo is NULL). + */ +void +wait_input(timo) + struct timeval *timo; +{ + fd_set ready; + int n; + + FD_ZERO(&ready); + FD_SET(ttyfd, &ready); + n = select(ttyfd+1, &ready, NULL, &ready, timo); + if (n < 0 && errno != EINTR) { + syslog(LOG_ERR, "select: %m"); + die(1); + } +} + + +/* + * wait_loop_output - wait until there is data available on the + * loopback, for the length of time specified by *timo (indefinite + * if timo is NULL). + */ +void +wait_loop_output(timo) + struct timeval *timo; +{ + wait_time(timo); +} + + +/* + * wait_time - wait for a given length of time or until a + * signal is received. + */ +void +wait_time(timo) + struct timeval *timo; +{ + int n; + + n = select(0, NULL, NULL, NULL, timo); + if (n < 0 && errno != EINTR) { + syslog(LOG_ERR, "select: %m"); die(1); } } @@ -157,11 +634,9 @@ read_packet(buf) { int len; - if ((len = read(fd, buf, MTU + DLLHEADERLEN)) < 0) { - if (errno == EWOULDBLOCK) { - MAINDEBUG((LOG_DEBUG, "read(fd): EWOULDBLOCK")); + if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) { + if (errno == EWOULDBLOCK || errno == EINTR) return -1; - } syslog(LOG_ERR, "read(fd): %m"); die(1); } @@ -169,6 +644,18 @@ read_packet(buf) } +/* + * get_loop_output - read characters from the loopback, form them + * into frames, and detect when we want to bring the real link up. + * Return value is 1 if we need to bring up the link, 0 otherwise. + */ +int +get_loop_output() +{ + return 0; +} + + /* * ppp_send_config - configure the transmit characteristics of * the ppp interface. @@ -176,31 +663,28 @@ read_packet(buf) void ppp_send_config(unit, mtu, asyncmap, pcomp, accomp) int unit, mtu; - u_long asyncmap; + u_int32_t asyncmap; int pcomp, accomp; { u_int x; - struct ifreq ifr; - strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - ifr.ifr_mtu = mtu; - if (ioctl(s, SIOCSIFMTU, (caddr_t) &ifr) < 0) { - syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m"); + if (ioctl(ppp_fd, PPPIOCSMTU, &mtu) < 0) { + syslog(LOG_ERR, "ioctl(PPPIOCSMTU): %m"); quit(); } - if (ioctl(fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) { + if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) { syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m"); quit(); } - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { + if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); quit(); } x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT; x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC; - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { + if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); quit(); } @@ -215,7 +699,7 @@ ppp_set_xaccm(unit, accm) int unit; ext_accm accm; { - if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) + if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) syslog(LOG_WARNING, "ioctl(set extended ACCM): %m"); } @@ -227,30 +711,100 @@ ppp_set_xaccm(unit, accm) void ppp_recv_config(unit, mru, asyncmap, pcomp, accomp) int unit, mru; - u_long asyncmap; + u_int32_t asyncmap; int pcomp, accomp; { int x; - if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0) { + if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) { syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m"); quit(); } - if (ioctl(fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) { + if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) { syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m"); quit(); } - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { + if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); quit(); } x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC; - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { + if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); quit(); } } +/* + * ccp_test - ask kernel whether a given compression method + * is acceptable for use. Returns 1 if the method and parameters + * are OK, 0 if the method is known but the parameters are not OK + * (e.g. code size should be reduced), or -1 if the method is unknown. + */ +int +ccp_test(unit, opt_ptr, opt_len, for_transmit) + int unit, opt_len, for_transmit; + u_char *opt_ptr; +{ + struct ppp_option_data data; + + data.ptr = opt_ptr; + data.length = opt_len; + data.transmit = for_transmit; + if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0) + return 1; + return (errno == ENOBUFS)? 0: -1; +} + +/* + * ccp_flags_set - inform kernel about the current state of CCP. + */ +void +ccp_flags_set(unit, isopen, isup) + int unit, isopen, isup; +{ + int x; + + if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { + syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); + return; + } + x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN; + x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP; + if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) + syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); +} + +/* + * ccp_fatal_error - returns 1 if decompression was disabled as a + * result of an error detected after decompression of a packet, + * 0 otherwise. This is necessary because of patent nonsense. + */ +int +ccp_fatal_error(unit) + int unit; +{ + int x; + + if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { + syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m"); + return 0; + } + return x & SC_DC_FERROR; +} + +/* + * get_idle_time - return how long the link has been idle. + */ +int +get_idle_time(u, ip) + int u; + struct ppp_idle *ip; +{ + return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0; +} + + /* * sifvjcomp - config tcp header compression */ @@ -260,17 +814,17 @@ sifvjcomp(u, vjcomp, cidcomp, maxcid) { u_int x; - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { + if (ioctl(ppp_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) { + if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); return 0; } - if (ioctl(fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { + if (ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); return 0; } @@ -282,27 +836,39 @@ sifvjcomp(u, vjcomp, cidcomp, maxcid) */ int sifup(u) + int u; { struct ifreq ifr; - u_int x; strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { + if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m"); return 0; } ifr.ifr_flags |= IFF_UP; - if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { + if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m"); return 0; } - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - return 0; - } - x |= SC_ENABLE_IP; - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); + if_is_up = 1; + return 1; +} + +/* + * sifnpmode - Set the mode for handling packets for a given NP. + */ +int +sifnpmode(u, proto, mode) + int u; + int proto; + enum NPmode mode; +{ + struct npioctl npi; + + npi.protocol = proto; + npi.mode = mode; + if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) { + syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode); return 0; } return 1; @@ -313,32 +879,29 @@ sifup(u) */ int sifdown(u) + int u; { struct ifreq ifr; - u_int x; int rv; + struct npioctl npi; rv = 1; - if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m"); - rv = 0; - } else { - x &= ~SC_ENABLE_IP; - if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { - syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m"); - rv = 0; - } - } + npi.protocol = PPP_IP; + npi.mode = NPMODE_ERROR; + ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi); + /* ignore errors, because ppp_fd might have been closed by now. */ + strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); - if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { + if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m"); rv = 0; } else { ifr.ifr_flags &= ~IFF_UP; - if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { + if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m"); rv = 0; - } + } else + if_is_up = 0; } return rv; } @@ -356,6 +919,8 @@ sifdown(u) */ int sifaddr(u, o, h, m) + int u; + u_int32_t o, h, m; { int ret; struct ifreq ifr; @@ -363,24 +928,26 @@ sifaddr(u, o, h, m) ret = 1; strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); SET_SA_FAMILY(ifr.ifr_addr, AF_INET); + if (m != 0) { + ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m; + syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m)); + if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) { + syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m"); + ret = 0; + } + } ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o; - if (ioctl(s, SIOCSIFADDR, (caddr_t) &ifr) < 0) { + if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) { syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m"); ret = 0; } ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h; - if (ioctl(s, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) { + if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) { syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m"); ret = 0; } - if (m != 0) { - ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m; - syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m)); - if (ioctl(s, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) { - syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m"); - ret = 0; - } - } + ifaddrs[0] = o; + ifaddrs[1] = h; return ret; } @@ -390,15 +957,19 @@ sifaddr(u, o, h, m) */ int cifaddr(u, o, h) + int u; + u_int32_t o, h; { struct rtentry rt; + ifaddrs[0] = 0; + BZERO(&rt, sizeof(rt)); SET_SA_FAMILY(rt.rt_dst, AF_INET); ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h; SET_SA_FAMILY(rt.rt_gateway, AF_INET); ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o; rt.rt_flags = RTF_HOST; - if (ioctl(s, SIOCDELRT, (caddr_t) &rt) < 0) { + if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) { syslog(LOG_ERR, "ioctl(SIOCDELRT): %m"); return 0; } @@ -413,14 +984,16 @@ sifdefaultroute(u, g) { struct rtentry rt; + BZERO(&rt, sizeof(rt)); SET_SA_FAMILY(rt.rt_dst, AF_INET); SET_SA_FAMILY(rt.rt_gateway, AF_INET); ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g; rt.rt_flags = RTF_GATEWAY; - if (ioctl(s, SIOCADDRT, &rt) < 0) { + if (ioctl(sockfd, SIOCADDRT, &rt) < 0) { syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m"); return 0; } + default_route_gateway = g; return 1; } @@ -432,12 +1005,15 @@ cifdefaultroute(u, g) { struct rtentry rt; + BZERO(&rt, sizeof(rt)); SET_SA_FAMILY(rt.rt_dst, AF_INET); SET_SA_FAMILY(rt.rt_gateway, AF_INET); ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g; rt.rt_flags = RTF_GATEWAY; - if (ioctl(s, SIOCDELRT, &rt) < 0) + if (ioctl(sockfd, SIOCDELRT, &rt) < 0) syslog(LOG_WARNING, "default route ioctl(SIOCDELRT): %m"); + default_route_gateway = 0; + return 1; } /* @@ -446,7 +1022,7 @@ cifdefaultroute(u, g) int sifproxyarp(unit, hisaddr) int unit; - u_long hisaddr; + u_int32_t hisaddr; { struct arpreq arpreq; @@ -464,11 +1040,12 @@ sifproxyarp(unit, hisaddr) SET_SA_FAMILY(arpreq.arp_pa, AF_INET); ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr; arpreq.arp_flags = ATF_PERM | ATF_PUBL; - if (ioctl(s, SIOCSARP, (caddr_t)&arpreq) < 0) { - syslog(LOG_ERR, "ioctl(SIOCSARP): %m"); + if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) { + syslog(LOG_ERR, "Couldn't add proxy arp entry: %m"); return 0; } + proxy_arp_addr = hisaddr; return 1; } @@ -478,17 +1055,18 @@ sifproxyarp(unit, hisaddr) int cifproxyarp(unit, hisaddr) int unit; - u_long hisaddr; + u_int32_t hisaddr; { struct arpreq arpreq; BZERO(&arpreq, sizeof(arpreq)); SET_SA_FAMILY(arpreq.arp_pa, AF_INET); ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr; - if (ioctl(s, SIOCDARP, (caddr_t)&arpreq) < 0) { - syslog(LOG_WARNING, "ioctl(SIOCDARP): %m"); + if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) { + syslog(LOG_WARNING, "Couldn't delete proxy arp entry: %m"); return 0; } + proxy_arp_addr = 0; return 1; } @@ -498,23 +1076,23 @@ cifproxyarp(unit, hisaddr) */ #define MAX_IFS 32 -int +static int get_ether_addr(ipaddr, hwaddr) - u_long ipaddr; + u_int32_t ipaddr; struct sockaddr *hwaddr; { - struct ifreq *ifr, *ifend, *ifp; - u_long ina, mask; - struct sockaddr_dl *dla; + struct ifreq *ifr, *ifend; + u_int32_t ina, mask; struct ifreq ifreq; struct ifconf ifc; struct ifreq ifs[MAX_IFS]; + struct ifdevea ifdevea; ifc.ifc_len = sizeof(ifs); ifc.ifc_req = ifs; - if (ioctl(s, SIOCGIFCONF, &ifc) < 0) { - syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m"); - return 0; + if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { + syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m"); + return 0; } /* @@ -522,7 +1100,8 @@ get_ether_addr(ipaddr, hwaddr) * address on the same subnet as `ipaddr'. */ ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); - for (ifr = ifc.ifc_req; ifr < ifend; ) { + for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *) + ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) { if (ifr->ifr_addr.sa_family == AF_INET) { ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); @@ -530,7 +1109,7 @@ get_ether_addr(ipaddr, hwaddr) * Check that the interface is up, and not point-to-point * or loopback. */ - if (ioctl(s, SIOCGIFFLAGS, &ifreq) < 0) + if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) continue; if ((ifreq.ifr_flags & (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP)) @@ -539,66 +1118,99 @@ get_ether_addr(ipaddr, hwaddr) /* * Get its netmask and check that it's on the right subnet. */ - if (ioctl(s, SIOCGIFNETMASK, &ifreq) < 0) + if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) continue; - mask = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; + mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr; if ((ipaddr & mask) != (ina & mask)) continue; - break; - } - ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + sizeof(struct sockaddr) -); + break; + } } if (ifr >= ifend) - return 0; - syslog(LOG_DEBUG, "found interface %s for proxy arp", ifr->ifr_name); + return 0; + syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name); /* - * Now scan through again looking for a link-level address - * for this interface. + * Grab the physical address for this interface. */ - ifp = ifr; - for (ifr = ifc.ifc_req; ifr < ifend; ) { - if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0 - && ifr->ifr_addr.sa_family == AF_DLI) { -/* && ifr->ifr_addr.sa_family == AF_LINK) { Per! Kolla !!! ROHACK */ - /* - * Found the link-level address - copy it out - */ - dla = (struct sockaddr_dl *)&ifr->ifr_addr; - hwaddr->sa_family = AF_UNSPEC; - BCOPY(dla, hwaddr->sa_data, sizeof(hwaddr->sa_data)); - return 1; - } - ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + sizeof(struct sockaddr) -); + strncpy(ifdevea.ifr_name, ifr->ifr_name, sizeof(ifdevea.ifr_name)); + if (ioctl(sockfd, SIOCRPHYSADDR, &ifdevea) < 0) { + syslog(LOG_ERR, "Couldn't get h/w address for %s: %m", ifr->ifr_name); + return 0; } - return 0; + hwaddr->sa_family = AF_UNSPEC; + BCOPY(ifdevea.current_pa, hwaddr->sa_data, 6); + return 1; } - /* - * ppp_available - check whether the system has any ppp interfaces - * (in fact we check whether we can do an ioctl on ppp0). + * Return user specified netmask, modified by any mask we might determine + * for address `addr' (in network byte order). + * Here we scan through the system's list of interfaces, looking for + * any non-point-to-point interfaces which might appear to be on the same + * network as `addr'. If we find any, we OR in their netmask to the + * user-specified netmask. */ - -int -ppp_available() +u_int32_t +GetMask(addr) + u_int32_t addr; { - int s, ok; - struct ifreq ifr; + u_int32_t mask, nmask, ina; + struct ifreq *ifr, *ifend, ifreq; + struct ifconf ifc; + struct ifreq ifs[MAX_IFS]; - if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) - return 1; /* can't tell - maybe we're not root */ + 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; + /* class D nets are disallowed by bad_ip_adrs */ + mask = netmask | htonl(nmask); - strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); - ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; - close(s); + /* + * Scan through the system's network interfaces. + */ + ifc.ifc_len = sizeof(ifs); + ifc.ifc_req = ifs; + 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 = (struct ifreq *) + ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) { + /* + * 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)) + continue; + /* + * 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) + continue; + /* + * 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; + } - return ok; + return mask; } @@ -658,3 +1270,78 @@ logwtmp(line, name, host) } close(fd); } + +/* + * Routines for locking and unlocking the serial device, moved here + * from chat.c. + */ + +#define LOCK_PREFIX "/usr/spool/uucp/LCK.." + +/* + * lock - create a lock file for the named device + */ +int +lock(dev) + char *dev; +{ + int fd, pid, n; + char *p; + + if ((p = strrchr(dev, '/')) != NULL) + dev = p + 1; + lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1); + if (lock_file == NULL) + novm("lock file name"); + strcat(strcpy(lock_file, LOCK_PREFIX), dev); + + 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, &pid, sizeof(pid)); + 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; + } + + pid = getpid(); + write(fd, &pid, sizeof pid); + + close(fd); + return 0; +} + +/* + * unlock - remove our lockfile + */ +void +unlock() +{ + if (lock_file) { + unlink(lock_file); + free(lock_file); + lock_file = NULL; + } +}