X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-ultrix.c;h=7fc4034e6b0cdecc568909eac88f98376faa45e9;hp=cad794b5e50fc43a9657e10c6dbe62480c9f407a;hb=bc45bd7903b4439e920bc2095b7543dc768f7ff8;hpb=5f312066e416675d5e93fa03bf29f207a8f41f84 diff --git a/pppd/sys-ultrix.c b/pppd/sys-ultrix.c index cad794b..7fc4034 100644 --- a/pppd/sys-ultrix.c +++ b/pppd/sys-ultrix.c @@ -19,7 +19,7 @@ */ #ifndef lint -static char rcsid[] = "$Id: sys-ultrix.c,v 1.5 1994/09/01 00:39:09 paulus Exp $"; +static char rcsid[] = "$Id: sys-ultrix.c,v 1.14 1995/08/11 02:36:26 paulus Exp $"; #endif /* @@ -27,7 +27,9 @@ static char rcsid[] = "$Id: sys-ultrix.c,v 1.5 1994/09/01 00:39:09 paulus Exp $" */ #include +#include #include +#include #include #include #include @@ -39,18 +41,22 @@ static char rcsid[] = "$Id: sys-ultrix.c,v 1.5 1994/09/01 00:39:09 paulus Exp $" #include #include - +#include #include #include #include #include "pppd.h" -#include "ppp.h" -static int initdisc = -1; /* Initial TTY discipline */ +static int initdisc = -1; /* Initial TTY 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; -static int restore_term; /* 1 => we've munged the terminal */ -static struct termios inittermios; /* Initial TTY termios */ +int sockfd; /* socket for doing interface ioctls */ /* * sys_init - System-dependent initialization. @@ -59,8 +65,12 @@ void sys_init() { openlog("pppd", LOG_PID); - 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) { + syslog(LOG_ERR, "Couldn't create IP socket: %m"); + die(1); + } } /* @@ -69,11 +79,56 @@ sys_init() void note_debug_level() { - if (debug) { - syslog(LOG_INFO, "Debug turned ON, Level %d", debug); +} + + +/* + * 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; + + if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) + return 1; /* can't tell - maybe we're not root */ + + strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); + ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; + close(s); + + return ok; } + /* * establish_ppp - Turn the serial port into a ppp interface. */ @@ -282,15 +337,17 @@ set_up_tty(fd, local) die(1); } - if (!restore_term) + if (!restore_term) { inittermios = tios; + ioctl(fd, TIOCGWINSZ, &wsinfo); + } + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); #ifdef CRTSCTS - tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL | CRTSCTS); - if (crtscts == 1) + if (crtscts > 0) tios.c_cflag |= CRTSCTS; -#else - tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); + else if (crtscts < 0) + tios.c_cflag &= ~CRTSCTS; #endif /* CRTSCTS */ tios.c_cflag |= CS8 | CREAD | HUPCL; @@ -314,6 +371,15 @@ set_up_tty(fd, local) cfsetispeed(&tios, speed); } 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) { + syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate", + devnam); + die(1); + } } if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { @@ -338,9 +404,19 @@ void restore_tty() { 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; } } @@ -409,9 +485,9 @@ 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(fd, buf, PPP_MTU + PPP_HDRLEN)) < 0) { + if (errno == EWOULDBLOCK || errno == EINTR) { + MAINDEBUG((LOG_DEBUG, "read(fd): %m")); return -1; } syslog(LOG_ERR, "read(fd): %m"); @@ -428,16 +504,13 @@ read_packet(buf) void ppp_send_config(unit, mtu, asyncmap, pcomp, accomp) int unit, mtu; - uint32 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(fd, PPPIOCSMTU, &mtu) < 0) { + syslog(LOG_ERR, "ioctl(PPPIOCSMTU): %m"); quit(); } @@ -479,7 +552,7 @@ ppp_set_xaccm(unit, accm) void ppp_recv_config(unit, mru, asyncmap, pcomp, accomp) int unit, mru; - uint32 asyncmap; + u_int32_t asyncmap; int pcomp, accomp; { int x; @@ -503,6 +576,22 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp) } } +/* + * ccp_test - ask kernel whether a given compression method + * is acceptable for use. + */ +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; + return ioctl(fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0; +} + /* * ccp_flags_set - inform kernel about the current state of CCP. */ @@ -522,6 +611,24 @@ ccp_flags_set(unit, isopen, isup) 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(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { + syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m"); + return 0; + } + return x & SC_DC_FERROR; +} + /* * sifvjcomp - config tcp header compression */ @@ -551,30 +658,45 @@ sifvjcomp(u, vjcomp, cidcomp, maxcid) /* * sifup - Config the interface up and enable IP packets to pass. */ +#ifndef SC_ENABLE_IP +#define SC_ENABLE_IP 0x100 /* compat for old versions of kernel code */ +#endif + int sifup(u) + int u; { struct ifreq ifr; u_int x; + struct npioctl npi; 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"); - return 0; + npi.protocol = PPP_IP; + npi.mode = NPMODE_PASS; + if (ioctl(fd, PPPIOCSNPMODE, &npi) < 0) { + if (errno != ENOTTY) { + syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m"); + return 0; + } + /* for backwards compatibility */ + 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"); + return 0; + } } return 1; } @@ -584,29 +706,42 @@ 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"); + npi.protocol = PPP_IP; + npi.mode = NPMODE_ERROR; + if (ioctl(fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) { + if (errno != ENOTTY) { + syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m"); rv = 0; + } else { + /* backwards compatibility */ + 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; + } + } } } + 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; } @@ -627,6 +762,8 @@ sifdown(u) */ int sifaddr(u, o, h, m) + int u; + u_int32_t o, h, m; { int ret; struct ifreq ifr; @@ -635,19 +772,19 @@ sifaddr(u, o, h, m) strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); SET_SA_FAMILY(ifr.ifr_addr, AF_INET); ((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) { + if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) { syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m"); ret = 0; } @@ -661,6 +798,8 @@ sifaddr(u, o, h, m) */ int cifaddr(u, o, h) + int u; + u_int32_t o, h; { struct rtentry rt; @@ -669,7 +808,7 @@ cifaddr(u, o, 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; } @@ -688,7 +827,7 @@ sifdefaultroute(u, g) 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; } @@ -707,7 +846,7 @@ cifdefaultroute(u, g) 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"); } @@ -717,7 +856,7 @@ cifdefaultroute(u, g) int sifproxyarp(unit, hisaddr) int unit; - uint32 hisaddr; + u_int32_t hisaddr; { struct arpreq arpreq; @@ -735,7 +874,7 @@ 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) { + if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) { syslog(LOG_ERR, "ioctl(SIOCSARP): %m"); return 0; } @@ -749,14 +888,14 @@ sifproxyarp(unit, hisaddr) int cifproxyarp(unit, hisaddr) int unit; - uint32 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) { + if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) { syslog(LOG_WARNING, "ioctl(SIOCDARP): %m"); return 0; } @@ -771,21 +910,21 @@ cifproxyarp(unit, hisaddr) int get_ether_addr(ipaddr, hwaddr) - uint32 ipaddr; + u_int32_t ipaddr; struct sockaddr *hwaddr; { - struct ifreq *ifr, *ifend, *ifp; - uint32 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; } /* @@ -793,7 +932,8 @@ 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)); @@ -801,7 +941,7 @@ 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)) @@ -810,66 +950,99 @@ 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) -); } 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; } @@ -929,3 +1102,78 @@ 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; + } +}