X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-svr4.c;h=716c2bd9d3e787472a6fb287c032a62aafb5a3ee;hp=68e38cda5d757ab8b2d2f46d97da39e9ae8036f8;hb=dee72905271845128ad26cff5cf770c433f3f4a7;hpb=4424e3f9ec75db16898568ca4453066e0e45a51b diff --git a/pppd/sys-svr4.c b/pppd/sys-svr4.c index 68e38cd..716c2bd 100644 --- a/pppd/sys-svr4.c +++ b/pppd/sys-svr4.c @@ -26,17 +26,24 @@ */ #ifndef lint -static char rcsid[] = "$Id: sys-svr4.c,v 1.2 1995/06/01 01:31:28 paulus Exp $"; +static char rcsid[] = "$Id: sys-svr4.c,v 1.8 1995/12/11 05:18:39 paulus Exp $"; #endif +#include #include #include #include +#include #include #include #include #include #include +#ifndef CRTSCTS +#include +#endif +#include +#include #include #include #include @@ -44,9 +51,11 @@ static char rcsid[] = "$Id: sys-svr4.c,v 1.2 1995/06/01 01:31:28 paulus Exp $"; #include #include #include +#include #include #include #include +#include #include #include #include @@ -63,6 +72,11 @@ static int ipmuxid = -1; static int restore_term; static struct termios inittermios; +#ifndef CRTSCTS +static struct termiox inittermiox; +#endif +static struct winsize wsinfo; /* Initial window size info */ +static pid_t tty_sid; /* original session ID for terminal */ static int link_mtu, link_mru; @@ -70,6 +84,20 @@ static int link_mtu, link_mru; static int tty_nmodules; static char tty_modules[NMODULES][FMNAMESZ+1]; +static int if_is_up; /* Interface has been marked up */ +static u_int32_t default_route_gateway; /* Gateway for default route added */ +static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */ + +/* 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 *)); +static int get_hw_addr __P((char *, struct sockaddr *)); +static int dlpi_attach __P((int, int)); +static int dlpi_info_req __P((int)); +static int dlpi_get_reply __P((int, union DL_primitives *, int, int)); +static int strioctl __P((int, int, void *, int, int)); + /* * sys_init - System-dependent initialization. */ @@ -88,6 +116,24 @@ sys_init() } } +/* + * 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) + sifdown(0); + if (default_route_gateway) + cifdefaultroute(0, default_route_gateway); + if (proxy_arp_addr) + cifproxyarp(0, proxy_arp_addr); +} + /* * daemon - Detach us from controlling terminal session. */ @@ -143,13 +189,27 @@ ppp_available() void establish_ppp() { - int i; + int i, ifd, x; +#ifndef sun + struct ifreq ifr; + struct { + union DL_primitives prim; + char space[64]; + } reply; +#endif + + if (default_device) + tty_sid = getsid((pid_t)0); pppfd = open("/dev/ppp", O_RDWR | O_NONBLOCK, 0); if (pppfd < 0) { syslog(LOG_ERR, "Can't open /dev/ppp: %m"); die(1); } + if (kdebugflag) { + x = PPPDBG_LOG + PPPDBG_DRIVER; + strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0); + } /* Assign a new PPA and get its unit number. */ if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0) { @@ -157,6 +217,51 @@ establish_ppp() die(1); } + /* + * Open the ppp device again and link it under the ip multiplexor. + * IP will assign a unit number which hopefully is the same as ifunit. + * I don't know any way to be certain they will be the same. :-( + */ + ifd = open("/dev/ppp", O_RDWR, 0); + if (ifd < 0) { + syslog(LOG_ERR, "Can't open /dev/ppp (2): %m"); + die(1); + } + if (kdebugflag) { + x = PPPDBG_LOG + PPPDBG_DRIVER; + strioctl(ifd, PPPIO_DEBUG, &x, sizeof(int), 0); + } +#ifdef sun + if (ioctl(ifd, I_PUSH, "ip") < 0) { + syslog(LOG_ERR, "Can't push IP module: %m"); + close(ifd); + die(1); + } +#else + if (dlpi_attach(ifd, ifunit) < 0 || + dlpi_get_reply(ifd, &reply.prim, DL_OK_ACK, sizeof(reply)) < 0) { + syslog(LOG_ERR, "Can't attach to ppp%d: %m", ifunit); + close(ifd); + die(1); + } +#endif + ipmuxid = ioctl(ipfd, I_LINK, ifd); + close(ifd); + if (ipmuxid < 0) { + syslog(LOG_ERR, "Can't link PPP device to IP: %m"); + die(1); + } + +#ifndef sun + /* Set the interface name for the link. */ + (void) sprintf (ifr.ifr_name, "ppp%d", ifunit); + ifr.ifr_metric = ipmuxid; + if (strioctl(ipfd, SIOCSIFNAME, (char *)&ifr, sizeof ifr, 0) < 0) { + syslog(LOG_ERR, "Can't set interface name %s: %m", ifr.ifr_name); + die(1); + } +#endif + /* Pop any existing modules off the tty stream. */ for (i = 0;; ++i) if (ioctl(fd, I_LOOK, tty_modules[i]) < 0 @@ -190,6 +295,13 @@ disestablish_ppp() { int i; + if (ipmuxid > 0) { + if (ioctl(ipfd, I_UNLINK, ipmuxid) < 0) { + if (!hungup) + syslog(LOG_ERR, "Can't unlink PPP from IP: %m"); + } + } + if (fdmuxid >= 0) { if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) { if (!hungup) @@ -205,6 +317,16 @@ disestablish_ppp() syslog(LOG_ERR, "Couldn't restore tty module %s: %m", tty_modules[i]); } + if (hungup && default_device && tty_sid > 0) { + /* + * If we have received a hangup, we need to send a SIGHUP + * to the terminal's controlling process. The reason is + * that the original stream head for the terminal hasn't + * seen the M_HANGUP message (it went up through the ppp + * driver to the stream head for our fd to /dev/ppp). + */ + kill(tty_sid, SIGHUP); + } } } @@ -286,7 +408,7 @@ struct speed { /* * Translate from bits/second to a speed_t. */ -int +static int translate_speed(bps) int bps; { @@ -304,7 +426,7 @@ translate_speed(bps) /* * Translate from a speed_t to bits/second. */ -int +static int baud_rate_of(speed) int speed; { @@ -323,25 +445,50 @@ baud_rate_of(speed) * 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; struct termios tios; +#if !defined (CRTSCTS) + struct termiox tiox; +#endif if (tcgetattr(fd, &tios) < 0) { syslog(LOG_ERR, "tcgetattr: %m"); die(1); } - if (!restore_term) +#ifndef CRTSCTS + if (ioctl (fd, TCGETX, &tiox) < 0) { + syslog (LOG_ERR, "TCGETX: %m"); + die (1); + } +#endif + + if (!restore_term) { inittermios = tios; +#ifndef CRTSCTS + inittermiox = tiox; +#endif + ioctl(fd, TIOCGWINSZ, &wsinfo); + } tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); +#ifdef CRTSCTS if (crtscts > 0) tios.c_cflag |= CRTSCTS; else if (crtscts < 0) tios.c_cflag &= ~CRTSCTS; +#else + if (crtscts > 0) { + tiox.x_hflag |= RTSXOFF|CTSXON; + } + else if (crtscts < 0) { + tiox.x_hflag &= ~(RTSXOFF|CTSXON); + } +#endif tios.c_cflag |= CS8 | CREAD | HUPCL; if (local || !modem) @@ -352,8 +499,8 @@ set_up_tty(fd, local) tios.c_cc[VMIN] = 1; tios.c_cc[VTIME] = 0; - if (crtscts == 2) { - tios.c_iflag |= IXOFF; + if (crtscts == -2) { + tios.c_iflag |= IXON | IXOFF; tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */ tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */ } @@ -380,6 +527,13 @@ set_up_tty(fd, local) die(1); } +#ifndef CRTSCTS + if (ioctl (fd, TCSETXF, &tiox) < 0){ + syslog (LOG_ERR, "TCSETXF: %m"); + die (1); + } +#endif + baud_rate = inspeed = baud_rate_of(speed); restore_term = 1; } @@ -403,6 +557,13 @@ restore_tty() if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) if (!hungup && errno != ENXIO) syslog(LOG_WARNING, "tcsetattr: %m"); +#ifndef CRTSCTS + if (ioctl (fd, TCSETXF, &inittermiox) < 0){ + if (!hungup && errno != ENXIO) + syslog (LOG_ERR, "TCSETXF: %m"); + } +#endif + ioctl(fd, TIOCSWINSZ, &wsinfo); restore_term = 0; } } @@ -411,6 +572,7 @@ restore_tty() * 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; { @@ -429,17 +591,24 @@ output(unit, p, len) int len; { struct strbuf data; + int retries; + struct pollfd pfd; if (debug) log_packet(p, len, "sent "); data.len = len; data.buf = (caddr_t) p; - if (putmsg(pppfd, NULL, &data, 0) < 0) { - if (errno != ENXIO) { - syslog(LOG_ERR, "Couldn't send packet: %m"); - die(1); + retries = 4; + while (putmsg(pppfd, NULL, &data, 0) < 0) { + if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) { + if (errno != ENXIO) + syslog(LOG_ERR, "Couldn't send packet: %m"); + break; } + pfd.fd = fd; + pfd.events = POLLOUT; + poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */ } } @@ -448,6 +617,7 @@ output(unit, p, len) * for the length of time specified by *timo (indefinite * if timo is NULL). */ +void wait_input(timo) struct timeval *timo; { @@ -576,12 +746,15 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp) * ccp_test - ask kernel whether a given compression method * is acceptable for use. */ +int ccp_test(unit, opt_ptr, opt_len, for_transmit) int unit, opt_len, for_transmit; u_char *opt_ptr; { - return strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP), - opt_ptr, opt_len, 0) >= 0; + if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP), + opt_ptr, opt_len, 0) >= 0) + return 1; + return (errno == ENOSR)? 0: -1; } /* @@ -659,10 +832,6 @@ sifup(u) { struct ifreq ifr; - if (ipmuxid < 0) { - syslog(LOG_DEBUG, "sifup: not plumbed!"); - return 0; - } strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); if (ioctl(ipfd, SIOCGIFFLAGS, &ifr) < 0) { syslog(LOG_ERR, "Couldn't mark interface up (get): %m"); @@ -673,6 +842,7 @@ sifup(u) syslog(LOG_ERR, "Couldn't mark interface up (set): %m"); return 0; } + if_is_up = 1; return 1; } @@ -697,6 +867,7 @@ sifdown(u) syslog(LOG_ERR, "Couldn't mark interface down (set): %m"); return 0; } + if_is_up = 0; return 1; } @@ -710,26 +881,8 @@ sifaddr(u, o, h, m) int u; u_int32_t o, h, m; { - int fd; struct ifreq ifr; - fd = open("/dev/ppp", O_RDWR, 0); - if (fd < 0) { - syslog(LOG_ERR, "Can't open /dev/ppp (2): %m"); - die(1); - } - if (ioctl(fd, I_PUSH, "ip") < 0) { - syslog(LOG_ERR, "Can't push IP module: %m"); - close(fd); - return 0; - } - ipmuxid = ioctl(ipfd, I_LINK, fd); - close(fd); - if (ipmuxid < 0) { - syslog(LOG_ERR, "Can't link PPP device to IP: %m"); - return 0; - } - memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); ifr.ifr_addr.sa_family = AF_INET; @@ -764,6 +917,7 @@ cifaddr(u, o, h) int u; u_int32_t o, h; { +#if 0 if (ipmuxid >= 0) { if (ioctl(ipfd, I_UNLINK, ipmuxid) < 0) { syslog(LOG_ERR, "Can't remove ppp interface unit: %m"); @@ -771,6 +925,7 @@ cifaddr(u, o, h) } ipmuxid = -1; } +#endif return 1; } @@ -795,6 +950,7 @@ sifdefaultroute(u, g) return 0; } + default_route_gateway = g; return 1; } @@ -819,6 +975,7 @@ cifdefaultroute(u, g) return 0; } + default_route_gateway = 0; return 1; } @@ -844,6 +1001,7 @@ sifproxyarp(unit, hisaddr) return 0; } + proxy_arp_addr = hisaddr; return 1; } @@ -865,6 +1023,7 @@ cifproxyarp(unit, hisaddr) return 0; } + proxy_arp_addr = 0; return 1; } @@ -874,7 +1033,7 @@ cifproxyarp(unit, hisaddr) */ #define MAX_IFS 32 -int +static int get_ether_addr(ipaddr, hwaddr) u_int32_t ipaddr; struct sockaddr *hwaddr; @@ -887,10 +1046,12 @@ get_ether_addr(ipaddr, hwaddr) /* * Scan through the system's network interfaces. */ +#ifdef SIOCGIFNUM if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0) +#endif nif = MAX_IFS; ifc.ifc_len = nif * sizeof(struct ifreq); - ifc.ifc_req = alloca(ifc.ifc_len); + ifc.ifc_buf = (caddr_t) alloca(ifc.ifc_len); if (ifc.ifc_req == 0) return 0; if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) { @@ -939,7 +1100,7 @@ get_ether_addr(ipaddr, hwaddr) /* * get_hw_addr - obtain the hardware address for a named interface. */ -int +static int get_hw_addr(name, hwaddr) char *name; struct sockaddr *hwaddr; @@ -974,22 +1135,27 @@ get_hw_addr(name, hwaddr) } if (dlpi_attach(iffd, unit) < 0 || dlpi_get_reply(iffd, &reply.prim, DL_OK_ACK, sizeof(reply)) < 0 - || dlpi_phys_addr_req(iffd) < 0 - || dlpi_get_reply(iffd, &reply.prim, DL_PHYS_ADDR_ACK, - sizeof(reply)) < 0) { + || dlpi_info_req(iffd) < 0 + || dlpi_get_reply(iffd, &reply.prim, DL_INFO_ACK, sizeof(reply)) < 0) { close(iffd); return 0; } + adrlen = reply.prim.info_ack.dl_addr_length; + adrp = (unsigned char *)&reply + reply.prim.info_ack.dl_addr_offset; +#if DL_CURRENT_VERSION >= 2 + if (reply.prim.info_ack.dl_sap_length < 0) + adrlen += reply.prim.info_ack.dl_sap_length; + else + adrp += reply.prim.info_ack.dl_sap_length; +#endif hwaddr->sa_family = AF_UNSPEC; - adrlen = reply.prim.physaddr_ack.dl_addr_length; - adrp = (unsigned char *)&reply + reply.prim.physaddr_ack.dl_addr_offset; memcpy(hwaddr->sa_data, adrp, adrlen); return 1; } -int +static int dlpi_attach(fd, ppa) int fd, ppa; { @@ -1003,21 +1169,20 @@ dlpi_attach(fd, ppa) return putmsg(fd, &buf, NULL, RS_HIPRI); } -int -dlpi_phys_addr_req(fd) +static int +dlpi_info_req(fd) int fd; { - dl_phys_addr_req_t req; + dl_info_req_t req; struct strbuf buf; - req.dl_primitive = DL_PHYS_ADDR_REQ; - req.dl_addr_type = DL_CURR_PHYS_ADDR; + req.dl_primitive = DL_INFO_REQ; buf.len = sizeof(req); buf.buf = (void *) &req; return putmsg(fd, &buf, NULL, RS_HIPRI); } -int +static int dlpi_get_reply(fd, reply, expected_prim, maxlen) union DL_primitives *reply; int fd, expected_prim, maxlen; @@ -1099,10 +1264,12 @@ GetMask(addr) /* * Scan through the system's network interfaces. */ +#ifdef SIOCGIFNUM if (ioctl(ipfd, SIOCGIFNUM, &nif) < 0) +#endif nif = MAX_IFS; ifc.ifc_len = nif * sizeof(struct ifreq); - ifc.ifc_req = alloca(ifc.ifc_len); + ifc.ifc_buf = (caddr_t) alloca(ifc.ifc_len); if (ifc.ifc_req == 0) return mask; if (ioctl(ipfd, SIOCGIFCONF, &ifc) < 0) { @@ -1146,6 +1313,21 @@ int logwtmp(line, name, host) char *line, *name, *host; { + static struct utmpx utmpx; + + if (name[0] != 0) { + /* logging in */ + strncpy(utmpx.ut_user, name, sizeof(utmpx.ut_user)); + strncpy(utmpx.ut_id, ifname, sizeof(utmpx.ut_id)); + strncpy(utmpx.ut_line, line, sizeof(utmpx.ut_line)); + utmpx.ut_pid = getpid(); + utmpx.ut_type = USER_PROCESS; + } else { + utmpx.ut_type = DEAD_PROCESS; + } + gettimeofday(&utmpx.ut_tv, NULL); + updwtmpx("/var/adm/wtmpx", &utmpx); + return 0; } /* @@ -1160,13 +1342,13 @@ gethostid() syslog(LOG_ERR, "sysinfo: %m"); return 0; } - return strtol(buf, NULL, 16); + return (int) strtoul(buf, NULL, 16); } -int +static int strioctl(fd, cmd, ptr, ilen, olen) int fd, cmd, ilen, olen; - char *ptr; + void *ptr; { struct strioctl str; @@ -1182,15 +1364,79 @@ strioctl(fd, cmd, ptr, ilen, olen) return 0; } +/* + * lock - create a lock file for the named lock device + */ + +#define LOCK_PREFIX "/var/spool/locks/LK." +static char lock_file[40]; /* name of lock file created */ + int lock(dev) char *dev; { + int n, fd, pid; + struct stat sbuf; + char ascii_pid[12]; + + if (stat(dev, &sbuf) < 0) { + syslog(LOG_ERR, "Can't get device number for %s: %m", dev); + return -1; + } + if ((sbuf.st_mode & S_IFMT) != S_IFCHR) { + syslog(LOG_ERR, "Can't lock %s: not a character device", dev); + return -1; + } + sprintf(lock_file, "%s%03d.%03d.%03d", LOCK_PREFIX, major(sbuf.st_dev), + major(sbuf.st_rdev), minor(sbuf.st_rdev)); + + 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, ascii_pid, 11); + if (n <= 0) { + syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file); + close(fd); + } else { + ascii_pid[n] = 0; + pid = atoi(ascii_pid); + if (pid > 0 && 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); + lock_file[0] = 0; + return -1; + } + + sprintf(ascii_pid, "%10d\n", getpid()); + write(fd, ascii_pid, 11); + + close(fd); return 1; } -int +/* + * unlock - remove our lockfile + */ +void unlock() { - return 1; + if (lock_file[0]) { + unlink(lock_file); + lock_file[0] = 0; + } }