$NetBSD: patch-az,v 1.3 2005/01/02 22:28:31 cube Exp $ --- pppd/sys-bsd.c.orig 2005-01-02 23:24:27.000000000 +0100 +++ pppd/sys-bsd.c @@ -0,0 +1,2184 @@ +/* NetBSD: sys-bsd.c,v 1.50 2004/12/05 04:16:22 christos Exp */ + +/* + * sys-bsd.c - System-dependent procedures for setting up + * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.) + * + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Copyright (c) 1989-2002 Paul Mackerras. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Paul Mackerras + * ". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include +#ifndef lint +#if 0 +#define RCSID "Id: sys-bsd.c,v 1.47 2000/04/13 12:04:23 paulus Exp " +#else +__RCSID("NetBSD: sys-bsd.c,v 1.50 2004/12/05 04:16:22 christos Exp "); +#endif +#endif + +/* + * TODO: + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#if defined(NetBSD1_2) || defined(__NetBSD_Version__) +#include +#endif +#ifdef PPP_FILTER +#include +#endif + +#include +#include +#include +#include +#include +#include +#ifdef __KAME__ +#include +#include +#endif +#include + +#if RTM_VERSION >= 3 +#include +#if defined(NetBSD) && (NetBSD >= 199703) +#include +#else /* NetBSD 1.2D or later */ +#ifdef __FreeBSD__ +#include +#else +#include +#endif +#endif +#endif + +#include "pppd.h" +#include "fsm.h" +#include "ipcp.h" + +#ifdef RCSID +static const char rcsid[] = RCSID; +#endif + +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 rtm_seq; + +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 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 sock_fd; /* socket for doing interface ioctls */ +#ifdef INET6 +static int sock6_fd = -1; /* socket for doing ipv6 interface ioctls */ +#endif /* INET6 */ +static int ttyfd = -1; /* the file descriptor of the tty */ + +static fd_set in_fds; /* set of fds that wait_input waits for */ +static int max_in_fd; /* highest fd set in in_fds */ + +static int if_is_up; /* the interface is currently up */ +static u_int32_t ifaddrs[2]; /* local and remote addresses we set */ +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 get_flags __P((int)); +static void set_flags __P((int, int)); +static int dodefaultroute __P((u_int32_t, int)); +static int get_ether_addr __P((u_int32_t, struct sockaddr_dl *)); +static void restore_loop(void); /* Transfer ppp unit back to loopback */ + + +/******************************************************************** + * + * Functions to read and set the flags value in the device driver + */ + +static int +get_flags(fd) + int fd; +{ + int flags; + + if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &flags) == -1) + fatal("ioctl(PPPIOCGFLAGS): %m"); + + SYSDEBUG((LOG_DEBUG, "get flags = %x\n", flags)); + return flags; +} + +/********************************************************************/ + +static void +set_flags(fd, flags) + int fd, flags; +{ + SYSDEBUG((LOG_DEBUG, "set flags = %x\n", flags)); + + if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &flags) == -1) + fatal("ioctl(PPPIOCSFLAGS, %x): %m", flags, errno); +} + +/* + * sys_init - System-dependent initialization. + */ +void +sys_init() +{ + /* Get an internet socket for doing socket ioctl's on. */ + if ((sock_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) + fatal("Couldn't create IP socket: %m"); + +#ifdef INET6 + if ((sock6_fd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { + /* check it at runtime */ + sock6_fd = -1; + } +#endif + + FD_ZERO(&in_fds); + max_in_fd = 0; +} + +/* + * 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) { + strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + if (ioctl(sock_fd, SIOCGIFFLAGS, &ifr) >= 0 + && ((ifr.ifr_flags & IFF_UP) != 0)) { + ifr.ifr_flags &= ~IFF_UP; + ioctl(sock_fd, SIOCSIFFLAGS, &ifr); + } + } + if (ifaddrs[0] != 0) + cifaddr(0, ifaddrs[0], ifaddrs[1]); + if (default_route_gateway) + cifdefaultroute(0, 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(sock_fd); + if (loop_slave >= 0) { + close(loop_slave); + close(loop_master); + } +} + +/* + * sys_check_options - check the options that the user specified + */ +int +sys_check_options() +{ +#ifndef CDTRCTS + if (crtscts == 2) { + warn("DTR/CTS flow control is not supported on this system"); + return 0; + } +#endif + return 1; +} + +/* + * 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() +{ + struct if_clonereq ifcr; + char *cp, *buf; + int idx, s, ok; + extern char *no_ppp_msg; + + (void)memset(&ifcr, 0, sizeof(ifcr)); + + if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) + fatal("socket: %m"); + + if (ioctl(s, SIOCIFGCLONERS, &ifcr) == -1) + fatal("ioctl(get cloners): %m"); + + buf = malloc(ifcr.ifcr_total * IFNAMSIZ); + if (buf == NULL) + fatal("Unable to allocate cloner name buffer: %m"); + + ifcr.ifcr_count = ifcr.ifcr_total; + ifcr.ifcr_buffer = buf; + + if (ioctl(s, SIOCIFGCLONERS, &ifcr) == -1) + fatal("ioctl(get cloners): %m"); + + /* + * In case some disappeared in the mean time, clamp it down. + */ + if (ifcr.ifcr_count > ifcr.ifcr_total) + ifcr.ifcr_count = ifcr.ifcr_total; + + for (cp = buf, idx = 0; idx < ifcr.ifcr_count; idx++, cp += IFNAMSIZ) { + if (strcmp(cp, "ppp") == 0) + break; + } + free(buf); + + if (idx == ifcr.ifcr_count) { + /* + * Try ppp0 directly, as before ppp was clonable. + */ + struct ifreq ifr; + (void)memset(&ifr, 0, sizeof(ifr)); + strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); + ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) != -1; + } else + ok = 1; + + (void)close(s); + +#ifdef __NetBSD__ + no_ppp_msg = "\ +This system lacks kernel support for PPP. To include PPP support\n\ +in the kernel, please read the ppp(4) manual page.\n"; +#else + 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.bsd\n\ +file in the ppp-2.2 distribution.\n"; +#endif + return ok; +} + +/* + * tty_establish_ppp - Turn the serial port into a ppp interface. + */ +int +tty_establish_ppp(fd) + int fd; +{ + int pppdisc = PPPDISC; + int x; + ttyfd = fd; + + if (demand) { + /* + * Demand mode - prime the old ppp device to relinquish the unit. + */ + if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) + fatal("ioctl(transfer ppp unit): %m"); + } + + /* + * Save the old line discipline of fd, and set it to PPP. + */ + if (ioctl(fd, TIOCGETD, &initdisc) < 0) + fatal("ioctl(TIOCGETD): %m"); + if (ioctl(fd, TIOCSETD, &pppdisc) < 0) + fatal("ioctl(TIOCSETD): %m"); + + if (!demand) { + /* + * Find out which interface we were given. + */ + if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) + fatal("ioctl(PPPIOCGUNIT): %m"); + } else { + /* + * Check that we got the same unit again. + */ + if (ioctl(fd, PPPIOCGUNIT, &x) < 0) + fatal("ioctl(PPPIOCGUNIT): %m"); + if (x != ifunit) + fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x); + x = TTYDISC; + ioctl(loop_slave, TIOCSETD, &x); + } + + ppp_fd = fd; + + /* + * Enable debug in the driver if requested. + */ + if (kdebugflag) { + x = get_flags(fd); + x |= (kdebugflag & 0xFF) * SC_DEBUG; + set_flags(fd, x); + } + + /* + * Set device for non-blocking reads. + */ + if ((initfdflags = fcntl(fd, F_GETFL)) == -1 + || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { + warn("Couldn't set device to non-blocking mode: %m"); + } + + return fd; +} + +/* + * restore_loop - reattach the ppp unit to the loopback. + */ +static void +restore_loop() +{ + int x; + + /* + * Transfer the ppp interface back to the loopback. + */ + if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) + fatal("ioctl(transfer ppp unit): %m"); + x = PPPDISC; + if (ioctl(loop_slave, TIOCSETD, &x) < 0) + fatal("ioctl(TIOCSETD): %m"); + + /* + * Check that we got the same unit again. + */ + if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) + fatal("ioctl(PPPIOCGUNIT): %m"); + if (x != ifunit) + fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x); + ppp_fd = loop_slave; +} + + +/* + * Determine if the PPP connection should still be present. + */ +extern int hungup; + +/* + * tty_disestablish_ppp - Restore the serial port to normal operation. + * and reconnect the ppp unit to the loopback if in demand mode. + * This shouldn't call die() because it's called from die(). + */ +void +tty_disestablish_ppp(fd) + int fd; +{ + if (demand) + restore_loop(); + + if (!hungup) { + + + /* Flush the tty output buffer so that the TIOCSETD doesn't hang. */ + if (tcflush(fd, TCIOFLUSH) < 0) + warn("tcflush failed: %m"); + + /* Restore old line discipline. */ + if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0) + error("ioctl(TIOCSETD): %m"); + initdisc = -1; + + /* Reset non-blocking mode on fd. */ + if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0) + warn("Couldn't restore device fd flags: %m"); + } + initfdflags = -1; + + if (fd == ppp_fd) + ppp_fd = -1; +} + +/* + * cfg_bundle - configure the existing bundle. + * Used in demand mode. + */ +void +cfg_bundle(mrru, mtru, rssn, tssn) + int mrru, mtru, rssn, tssn; +{ + abort(); +#ifdef notyet + int flags; + struct ifreq ifr; + + if (!new_style_driver) + return; + + /* set the mrru, mtu and flags */ + if (ioctl(ppp_dev_fd, PPPIOCSMRRU, &mrru) < 0) + error("Couldn't set MRRU: %m"); + flags = get_flags(ppp_dev_fd); + flags &= ~(SC_MP_SHORTSEQ | SC_MP_XSHORTSEQ); + flags |= (rssn? SC_MP_SHORTSEQ: 0) | (tssn? SC_MP_XSHORTSEQ: 0) + | (mrru? SC_MULTILINK: 0); + + set_flags(ppp_dev_fd, flags); + + /* connect up the channel */ + if (ioctl(ppp_fd, PPPIOCCONNECT, &ifunit) < 0) + fatal("Couldn't attach to PPP unit %d: %m", ifunit); + add_fd(ppp_dev_fd); +#endif +} + +/* + * make_new_bundle - create a new PPP unit (i.e. a bundle) + * and connect our channel to it. This should only get called + * if `multilink' was set at the time establish_ppp was called. + * In demand mode this uses our existing bundle instead of making + * a new one. + */ +void +make_new_bundle(mrru, mtru, rssn, tssn) + int mrru, mtru, rssn, tssn; +{ + abort(); +#ifdef notyet + if (!new_style_driver) + return; + + /* make us a ppp unit */ + if (make_ppp_unit() < 0) + die(1); + + /* set the mrru, mtu and flags */ + cfg_bundle(mrru, mtru, rssn, tssn); +#endif +} + +/* + * bundle_attach - attach our link to a given PPP unit. + * We assume the unit is controlled by another pppd. + */ +int +bundle_attach(ifnum) + int ifnum; +{ + abort(); +#ifdef notyet + if (!new_style_driver) + return -1; + + if (ioctl(ppp_dev_fd, PPPIOCATTACH, &ifnum) < 0) { + if (errno == ENXIO) + return 0; /* doesn't still exist */ + fatal("Couldn't attach to interface unit %d: %m\n", ifnum); + } + if (ioctl(ppp_fd, PPPIOCCONNECT, &ifnum) < 0) + fatal("Couldn't connect to interface unit %d: %m", ifnum); + set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) | SC_MULTILINK); + + ifunit = ifnum; +#endif + return 1; +} + +/* + * destroy_bundle - tell the driver to destroy our bundle. + */ +void destroy_bundle(void) +{ +#if notyet + if (ppp_dev_fd >= 0) { + close(ppp_dev_fd); + remove_fd(ppp_dev_fd); + ppp_dev_fd = -1; + } +#endif +} + + +/* + * Check whether the link seems not to be 8-bit clean. + */ +void +clean_check() +{ + int x; + char *s; + + 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) { + struct ppp_rawin win; + char buf[4 * sizeof(win.buf) + 1]; + int i; + warn("Serial link is not 8-bit clean:"); + warn("All received characters had %s", s); + if (ioctl(ppp_fd, PPPIOCGRAWIN, &win) == -1) { + warn("ioctl(PPPIOCGRAWIN): %s", strerror(errno)); + return; + } + for (i = 0; i < sizeof(win.buf); i++) + win.buf[i] = win.buf[i] & 0x7f; + strvisx(buf, (char *)win.buf, win.count, VIS_CSTYLE); + warn("Last %d characters were: %s", (int)win.count, buf); + } + } +} + +/* + * 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. + * + * For *BSD, we assume that speed_t values numerically equal bits/second. + */ +void +set_up_tty(fd, local) + int fd, local; +{ + struct termios tios; + + if (tcgetattr(fd, &tios) < 0) + fatal("tcgetattr: %m"); + + if (!restore_term) { + inittermios = tios; + ioctl(fd, TIOCGWINSZ, &wsinfo); + } + + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); + if (crtscts > 0 && !local) { + if (crtscts == 2) { +#ifdef CDTRCTS + tios.c_cflag |= CDTRCTS; +#endif + } else + tios.c_cflag |= CRTSCTS; + } else if (crtscts < 0) { + tios.c_cflag &= ~CRTSCTS; +#ifdef CDTRCTS + tios.c_cflag &= ~CDTRCTS; +#endif + } + + 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 */ + } + + if (inspeed) { + cfsetospeed(&tios, inspeed); + cfsetispeed(&tios, inspeed); + } else { + inspeed = cfgetospeed(&tios); + /* + * We can't proceed if the serial port speed is 0, + * since that implies that the serial port is disabled. + */ + if (inspeed == 0) + fatal("Baud rate for %s is 0; need explicit baud rate", devnam); + } + baud_rate = inspeed; + + if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) + fatal("tcsetattr: %m"); + + restore_term = 1; +} + +/* + * 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) + warn("tcsetattr: %m"); + ioctl(fd, TIOCSWINSZ, &wsinfo); + restore_term = 0; + } +} + +/* + * 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); +} + +#ifdef INET6 +/* + * sif6addr - Config the interface with an IPv6 link-local address + */ +int +sif6addr(unit, our_eui64, his_eui64) + int unit; + eui64_t our_eui64, his_eui64; +{ +#ifdef __KAME__ + int ifindex; + struct in6_aliasreq addreq6; + + if (sock6_fd < 0) { + fatal("No IPv6 socket available"); + /*NOTREACHED*/ + } + + /* actually, this part is not kame local - RFC2553 conformant */ + ifindex = if_nametoindex(ifname); + if (ifindex == 0) { + error("sifaddr6: no interface %s", ifname); + return 0; + } + + memset(&addreq6, 0, sizeof(addreq6)); + strlcpy(addreq6.ifra_name, ifname, sizeof(addreq6.ifra_name)); + + /* my addr */ + addreq6.ifra_addr.sin6_family = AF_INET6; + addreq6.ifra_addr.sin6_len = sizeof(struct sockaddr_in6); + addreq6.ifra_addr.sin6_addr.s6_addr[0] = 0xfe; + addreq6.ifra_addr.sin6_addr.s6_addr[1] = 0x80; + memcpy(&addreq6.ifra_addr.sin6_addr.s6_addr[8], &our_eui64, + sizeof(our_eui64)); + /* KAME ifindex hack */ + *(u_int16_t *)&addreq6.ifra_addr.sin6_addr.s6_addr[2] = htons(ifindex); + + /* his addr */ + addreq6.ifra_dstaddr.sin6_family = AF_INET6; + addreq6.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6); + addreq6.ifra_dstaddr.sin6_addr.s6_addr[0] = 0xfe; + addreq6.ifra_dstaddr.sin6_addr.s6_addr[1] = 0x80; + memcpy(&addreq6.ifra_dstaddr.sin6_addr.s6_addr[8], &his_eui64, + sizeof(our_eui64)); + /* KAME ifindex hack */ + *(u_int16_t *)&addreq6.ifra_dstaddr.sin6_addr.s6_addr[2] = htons(ifindex); + + /* prefix mask: 128bit */ + addreq6.ifra_prefixmask.sin6_family = AF_INET6; + addreq6.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); + memset(&addreq6.ifra_prefixmask.sin6_addr, 0xff, + sizeof(addreq6.ifra_prefixmask.sin6_addr)); + + /* address lifetime (infty) */ + addreq6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; + addreq6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; + + if (ioctl(sock6_fd, SIOCAIFADDR_IN6, &addreq6) < 0) { + error("sif6addr: ioctl(SIOCAIFADDR_IN6): %m"); + return 0; + } + + return 1; +#else + struct in6_ifreq ifr6; + struct ifreq ifr; + struct in6_rtmsg rt6; + + if (sock6_fd < 0) { + fatal("No IPv6 socket available"); + /*NOTREACHED*/ + } + + memset(&ifr, 0, sizeof (ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) { + error("sif6addr: ioctl(SIOCGIFINDEX): %m"); + return 0; + } + + /* Local interface */ + memset(&ifr6, 0, sizeof(ifr6)); + IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64); + ifr6.ifr6_ifindex = ifindex; + ifr6.ifr6_prefixlen = 10; + + if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6) < 0) { + error("sif6addr: ioctl(SIOCSIFADDR): %m"); + return 0; + } + + /* Route to remote host */ + memset(&rt6, 0, sizeof(rt6)); + IN6_LLADDR_FROM_EUI64(rt6.rtmsg_dst, his_eui64); + rt6.rtmsg_flags = RTF_UP | RTF_HOST; + rt6.rtmsg_dst_len = 128; + rt6.rtmsg_ifindex = ifr.ifr_ifindex; + rt6.rtmsg_metric = 1; + + if (ioctl(sock6_fd, SIOCADDRT, &rt6) < 0) { + error("sif6addr: ioctl(SIOCADDRT): %m"); + return 0; + } + + return 1; +#endif +} + + +/* + * cif6addr - Remove IPv6 address from interface + */ +int +cif6addr(unit, our_eui64, his_eui64) + int unit; + eui64_t our_eui64, his_eui64; +{ +#ifdef __KAME__ + int ifindex; + struct in6_ifreq delreq6; + + if (sock6_fd < 0) { + fatal("No IPv6 socket available"); + /*NOTREACHED*/ + } + + /* actually, this part is not kame local - RFC2553 conformant */ + ifindex = if_nametoindex(ifname); + if (ifindex == 0) { + error("cifaddr6: no interface %s", ifname); + return 0; + } + + memset(&delreq6, 0, sizeof(delreq6)); + strlcpy(delreq6.ifr_name, ifname, sizeof(delreq6.ifr_name)); + + /* my addr */ + delreq6.ifr_ifru.ifru_addr.sin6_family = AF_INET6; + delreq6.ifr_ifru.ifru_addr.sin6_len = sizeof(struct sockaddr_in6); + delreq6.ifr_ifru.ifru_addr.sin6_addr.s6_addr[0] = 0xfe; + delreq6.ifr_ifru.ifru_addr.sin6_addr.s6_addr[1] = 0x80; + memcpy(&delreq6.ifr_ifru.ifru_addr.sin6_addr.s6_addr[8], &our_eui64, + sizeof(our_eui64)); + /* KAME ifindex hack */ + *(u_int16_t *)&delreq6.ifr_ifru.ifru_addr.sin6_addr.s6_addr[2] = + htons(ifindex); + + if (ioctl(sock6_fd, SIOCDIFADDR_IN6, &delreq6) < 0) { + error("cif6addr: ioctl(SIOCDIFADDR_IN6): %m"); + return 0; + } + + return 1; +#else + struct ifreq ifr; + struct in6_ifreq ifr6; + + if (sock6_fd < 0) { + fatal("No IPv6 socket available"); + /*NOTREACHED*/ + } + + memset(&ifr, 0, sizeof(ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) { + error("cif6addr: ioctl(SIOCGIFINDEX): %m"); + return 0; + } + + memset(&ifr6, 0, sizeof(ifr6)); + IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64); + ifr6.ifr6_ifindex = ifr.ifr_ifindex; + ifr6.ifr6_prefixlen = 10; + + if (ioctl(sock6_fd, SIOCDIFADDR, &ifr6) < 0) { + if (errno != EADDRNOTAVAIL) { + if (! ok_error (errno)) + error("cif6addr: ioctl(SIOCDIFADDR): %m"); + } + else { + warn("cif6addr: ioctl(SIOCDIFADDR): No such address"); + } + return (0); + } + return 1; +#endif +} +#endif /* INET6 */ + +/* + * get_pty - get a pty master/slave pair and chown the slave side + * to the uid given. Assumes slave_name points to >= 12 bytes of space. + */ +int +get_pty(master_fdp, slave_fdp, slave_name, uid) + int *master_fdp; + int *slave_fdp; + char *slave_name; + int uid; +{ + struct termios tios; + + if (openpty(master_fdp, slave_fdp, slave_name, NULL, NULL) < 0) + return 0; + + fchown(*slave_fdp, uid, -1); + fchmod(*slave_fdp, S_IRUSR | S_IWUSR); + if (tcgetattr(*slave_fdp, &tios) == 0) { + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB); + tios.c_cflag |= CS8 | CREAD; + tios.c_iflag = IGNPAR | CLOCAL; + tios.c_oflag = 0; + tios.c_lflag = 0; + if (tcsetattr(*slave_fdp, TCSAFLUSH, &tios) < 0) + warn("couldn't set attributes on pty: %m"); + } else + warn("couldn't get attributes on pty: %m"); + + return 1; +} + + +/* + * open_ppp_loopback - open the device we use for getting + * packets in demand mode, and connect it to a ppp interface. + * Here we use a pty. + */ +int +open_ppp_loopback() +{ + int flags; + struct termios tios; + int pppdisc = PPPDISC; + + if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0) + fatal("No free pty for loopback"); + SYSDEBUG(("using %s for loopback", loop_name)); + + if (tcgetattr(loop_slave, &tios) == 0) { + tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB); + tios.c_cflag |= CS8 | CREAD; + tios.c_iflag = IGNPAR; + tios.c_oflag = 0; + tios.c_lflag = 0; + if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0) + warn("couldn't set attributes on loopback: %m"); + } + + if ((flags = fcntl(loop_master, F_GETFL)) != -1) + if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1) + warn("couldn't set loopback to nonblock: %m"); + + ppp_fd = loop_slave; + if (ioctl(ppp_fd, TIOCSETD, &pppdisc) < 0) + fatal("ioctl(TIOCSETD): %m"); + + /* + * Find out which interface we were given. + */ + if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0) + fatal("ioctl(PPPIOCGUNIT): %m"); + + /* + * Enable debug in the driver if requested. + */ + if (kdebugflag) { + flags = get_flags(ppp_fd); + flags |= (kdebugflag & 0xFF) * SC_DEBUG; + set_flags(ppp_fd, flags); + } + + return loop_master; +} + + +/* + * output - Output PPP packet. + */ +void +output(unit, p, len) + int unit; + u_char *p; + int len; +{ + if (debug) + dbglog("sent %P", p, len); + + if (write(ttyfd, p, len) < 0) { + if (errno != EIO) + error("write: %m"); + } +} + + +/* + * wait_input - wait until there is data available, + * 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; + + ready = in_fds; + n = select(max_in_fd + 1, &ready, NULL, &ready, timo); + if (n < 0 && errno != EINTR) + fatal("select: %m"); +} + + +/* + * add_fd - add an fd to the set that wait_input waits for. + */ +void add_fd(fd) + int fd; +{ + if (fd >= FD_SETSIZE) + fatal("descriptor too big"); + FD_SET(fd, &in_fds); + if (fd > max_in_fd) + max_in_fd = fd; +} + +/* + * remove_fd - remove an fd from the set that wait_input waits for. + */ +void remove_fd(fd) + int fd; +{ + FD_CLR(fd, &in_fds); +} + +#if 0 +/* + * 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; +{ + fd_set ready; + int n; + + FD_ZERO(&ready); + if (loop_master >= FD_SETSIZE) + fatal("descriptor too big"); + FD_SET(loop_master, &ready); + n = select(loop_master + 1, &ready, NULL, &ready, timo); + if (n < 0 && errno != EINTR) + fatal("select: %m"); +} + + +/* + * 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) + fatal("select: %m"); +} +#endif + + +/* + * read_packet - get a PPP packet from the serial device. + */ +int +read_packet(buf) + u_char *buf; +{ + int len; + + if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) { + if (errno == EWOULDBLOCK || errno == EINTR) + return -1; + fatal("read: %m"); + } + return len; +} + + +/* + * 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() +{ + int rv = 0; + int n; + + while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) { + if (loop_chars(inbuf, n)) + rv = 1; + } + + if (n == 0) + fatal("eof on loopback"); + if (errno != EWOULDBLOCK) + fatal("read from loopback: %m"); + + return rv; +} + + +/* + * netif_set_mtu - set the MTU on the PPP network interface. + */ +void +netif_set_mtu(unit, mtu) + int unit, mtu; +{ + struct ifreq ifr; + + SYSDEBUG((LOG_DEBUG, "netif_set_mtu: mtu = %d\n", mtu)); + + memset(&ifr, '\0', sizeof (ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + ifr.ifr_mtu = mtu; + + if (ifunit >= 0 && ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0) + fatal("ioctl(SIOCSIFMTU): %m"); +} + +/* + * netif_get_mtu - get the MTU on the PPP network interface. + */ +int +netif_get_mtu(int unit) +{ + struct ifreq ifr; + + memset (&ifr, '\0', sizeof (ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + + if (ifunit >= 0 && ioctl(sock_fd, SIOCGIFMTU, (caddr_t) &ifr) < 0) { + error("ioctl(SIOCGIFMTU): %m (line %d)", __LINE__); + return 0; + } + return ifr.ifr_mtu; +} + + +/* + * tty_send_config - configure the transmit characteristics of + * the ppp interface. + */ +void +tty_send_config(mtu, asyncmap, pcomp, accomp) + int mtu; + u_int32_t asyncmap; + int pcomp, accomp; +{ + u_int x; +#if 0 + /* Linux code does not do anything with the mtu here */ + ifnet_set_mtu(-1, mtu); +#endif + + if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) + fatal("ioctl(PPPIOCSASYNCMAP): %m"); + + x = get_flags(ppp_fd); + x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT; + x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC; + x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC; + set_flags(ppp_fd, x); +} + + +/* + * ppp_set_xaccm - set the extended transmit ACCM for the interface. + */ +void +tty_set_xaccm(accm) + ext_accm accm; +{ + if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) + warn("ioctl(set extended ACCM): %m"); +} + + +/* + * ppp_recv_config - configure the receive-side characteristics of + * the ppp interface. + */ +void +tty_recv_config(mru, asyncmap, pcomp, accomp) + int mru; + u_int32_t asyncmap; + int pcomp, accomp; +{ + int x; + + if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) + fatal("ioctl(PPPIOCSMRU): %m"); + if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) + fatal("ioctl(PPPIOCSRASYNCMAP): %m"); + x = get_flags(ppp_fd); + x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC; + set_flags(ppp_fd, x); +} + +/* + * 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; + + x = get_flags(ppp_fd); + x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN; + x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP; + set_flags(ppp_fd, x); +} + +/* + * 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; + + x = get_flags(ppp_fd); + 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; +} + +/* + * get_ppp_stats - return statistics for the link. + */ +int +get_ppp_stats(u, stats) + int u; + struct pppd_stats *stats; +{ + struct ifpppstatsreq req; + + memset (&req, 0, sizeof (req)); + strlcpy(req.ifr_name, ifname, sizeof(req.ifr_name)); + if (ioctl(sock_fd, SIOCGPPPSTATS, &req) < 0) { + error("Couldn't get PPP statistics: %m"); + return 0; + } + stats->bytes_in = req.stats.p.ppp_ibytes; + stats->bytes_out = req.stats.p.ppp_obytes; + return 1; +} + + +#ifdef PPP_FILTER +/* + * set_filters - transfer the pass and active filters to the kernel. + */ +int +set_filters(pass_in, pass_out, active_in, active_out) + struct bpf_program *pass_in, *pass_out, *active_in, *active_out; +{ + int ret = 1; + + if (pass_in->bf_len > 0) { + if (ioctl(ppp_fd, PPPIOCSIPASS, pass_in) < 0) { + error("Couldn't set pass-filter-in in kernel: %m"); + ret = 0; + } + } + + if (pass_out->bf_len > 0) { + if (ioctl(ppp_fd, PPPIOCSOPASS, pass_out) < 0) { + error("Couldn't set pass-filter-out in kernel: %m"); + ret = 0; + } + } + + if (active_in->bf_len > 0) { + if (ioctl(ppp_fd, PPPIOCSIACTIVE, active_in) < 0) { + error("Couldn't set active-filter-in in kernel: %m"); + ret = 0; + } + } + + if (active_out->bf_len > 0) { + if (ioctl(ppp_fd, PPPIOCSOACTIVE, active_out) < 0) { + error("Couldn't set active-filter-out in kernel: %m"); + ret = 0; + } + } + + return ret; +} +#endif + +/* + * sifvjcomp - config tcp header compression + */ +int +sifvjcomp(u, vjcomp, cidcomp, maxcid) + int u, vjcomp, cidcomp, maxcid; +{ + u_int x; + + x = get_flags(ppp_fd); + x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP; + x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID; + set_flags(ppp_fd, x); + if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { + error("ioctl(PPPIOCSMAXCID): %m"); + return 0; + } + return 1; +} + +/* + * sifup - Config the interface up and enable IP packets to pass. + */ +int +sifup(u) + int u; +{ + struct ifreq ifr; + + strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { + error("ioctl (SIOCGIFFLAGS): %m"); + return 0; + } + ifr.ifr_flags |= IFF_UP; + if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { + error("ioctl(SIOCSIFFLAGS): %m"); + return 0; + } + 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) { + error("ioctl(set NP %d mode to %d): %m", proto, mode); + return 0; + } + return 1; +} + +/* + * sifdown - Config the interface down and disable IP. + */ +int +sifdown(u) + int u; +{ + struct ifreq ifr; + int rv; + struct npioctl npi; + + rv = 1; + 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. */ + + strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { + error("ioctl (SIOCGIFFLAGS): %m"); + rv = 0; + } else { + ifr.ifr_flags &= ~IFF_UP; + if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { + error("ioctl(SIOCSIFFLAGS): %m"); + rv = 0; + } else + if_is_up = 0; + } + return rv; +} + +/* + * SET_SA_FAMILY - set the sa_family field of a struct sockaddr, + * if it exists. + */ +#define SET_SA_FAMILY(addr, family) \ + BZERO((char *) &(addr), sizeof(addr)); \ + addr.sa_family = (family); \ + addr.sa_len = sizeof(addr); + +/* + * sifaddr - Config the interface IP addresses and netmask. + */ +int +sifaddr(u, o, h, m) + int u; + u_int32_t o, h, m; +{ + struct ifaliasreq ifra; + struct ifreq ifr; + + strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name)); + SET_SA_FAMILY(ifra.ifra_addr, AF_INET); + ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o; + SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET); + ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h; + if (m != 0) { + SET_SA_FAMILY(ifra.ifra_mask, AF_INET); + ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m; + } else + BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask)); + BZERO(&ifr, sizeof(ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + if (ioctl(sock_fd, SIOCDIFADDR, (caddr_t) &ifr) < 0) { + if (errno != EADDRNOTAVAIL) + warn("Couldn't remove interface address: %m"); + } + if (ioctl(sock_fd, SIOCAIFADDR, (caddr_t) &ifra) < 0) { + if (errno != EEXIST) { + error("Couldn't set interface address: %m"); + return 0; + } + warn("Couldn't set interface address: Address %I already exists", o); + } + ifaddrs[0] = o; + ifaddrs[1] = h; + return 1; +} + +/* + * cifaddr - Clear the interface IP addresses, and delete routes + * through the interface if possible. + */ +int +cifaddr(u, o, h) + int u; + u_int32_t o, h; +{ + struct ifaliasreq ifra; + + ifaddrs[0] = 0; + strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name)); + SET_SA_FAMILY(ifra.ifra_addr, AF_INET); + ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o; + SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET); + ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h; + BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask)); + if (ioctl(sock_fd, SIOCDIFADDR, (caddr_t) &ifra) < 0) { + if (errno != EADDRNOTAVAIL) + warn("Couldn't delete interface address: %m"); + return 0; + } + return 1; +} + +/* + * sifdefaultroute - assign a default route through the address given. + */ +int +sifdefaultroute(u, l, g) + int u; + u_int32_t l, g; +{ + return dodefaultroute(g, 's'); +} + +/* + * cifdefaultroute - delete a default route through the address given. + */ +int +cifdefaultroute(u, l, g) + int u; + u_int32_t l, g; +{ + return dodefaultroute(g, 'c'); +} + +/******************************************************************** + * + * sipxfaddr - Config the interface IPX networknumber + */ + +int sipxfaddr (int unit, unsigned long int network, unsigned char * node ) +{ + int result = 1; + +#ifdef IPX_CHANGE + int skfd; + struct ifreq ifr; + struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr; + + skfd = socket (AF_IPX, SOCK_DGRAM, 0); + if (skfd < 0) { + if (! ok_error (errno)) + dbglog("socket(AF_IPX): %m (line %d)", __LINE__); + result = 0; + } + else { + memset (&ifr, '\0', sizeof (ifr)); + strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + + memcpy (sipx->sipx_node, node, IPX_NODE_LEN); + sipx->sipx_family = AF_IPX; + sipx->sipx_port = 0; + sipx->sipx_network = htonl (network); + sipx->sipx_type = IPX_FRAME_ETHERII; + sipx->sipx_action = IPX_CRTITF; +/* + * Set the IPX device + */ + if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) { + result = 0; + if (errno != EEXIST) { + if (! ok_error (errno)) + dbglog("ioctl(SIOCSIFADDR, CRTITF): %m (line %d)", __LINE__); + } + else { + warn("ioctl(SIOCSIFADDR, CRTITF): Address already exists"); + } + } + close (skfd); + } +#endif + return result; +} + +/******************************************************************** + * + * cipxfaddr - Clear the information for the IPX network. The IPX routes + * are removed and the device is no longer able to pass IPX + * frames. + */ + +int cipxfaddr (int unit) +{ + int result = 1; + +#ifdef IPX_CHANGE + int skfd; + struct ifreq ifr; + struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr; + + skfd = socket (AF_IPX, SOCK_DGRAM, 0); + if (skfd < 0) { + if (! ok_error (errno)) + dbglog("socket(AF_IPX): %m (line %d)", __LINE__); + result = 0; + } + else { + memset (&ifr, '\0', sizeof (ifr)); + strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + + sipx->sipx_type = IPX_FRAME_ETHERII; + sipx->sipx_action = IPX_DLTITF; + sipx->sipx_family = AF_IPX; +/* + * Set the IPX device + */ + if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) { + if (! ok_error (errno)) + info("ioctl(SIOCSIFADDR, IPX_DLTITF): %m (line %d)", __LINE__); + result = 0; + } + close (skfd); + } +#endif + return result; +} + +/* + * dodefaultroute - talk to a routing socket to add/delete a default route. + */ +static int +dodefaultroute(g, cmd) + u_int32_t g; + int cmd; +{ + int routes; + struct { + struct rt_msghdr hdr; + struct sockaddr_in dst; + struct sockaddr_in gway; + struct sockaddr_in netmask; + struct sockaddr_in genmask; + struct sockaddr_dl ifp; + } rtmsg; + + if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { + error("Couldn't %s default route: socket: %m", + cmd == 's' ? "add" : "delete"); + return 0; + } + + memset(&rtmsg, 0, sizeof(rtmsg)); + + rtmsg.hdr.rtm_type = cmd == 's' ? RTM_ADD : RTM_DELETE; + rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; + rtmsg.hdr.rtm_version = RTM_VERSION; + rtmsg.hdr.rtm_seq = ++rtm_seq; + rtmsg.hdr.rtm_addrs = + RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_GENMASK | RTA_IFP; + + rtmsg.dst.sin_len = sizeof(rtmsg.dst); + rtmsg.dst.sin_family = AF_INET; + rtmsg.dst.sin_addr.s_addr = 0; + + rtmsg.gway.sin_len = sizeof(rtmsg.gway); + rtmsg.gway.sin_family = AF_INET; + rtmsg.gway.sin_addr.s_addr = g; + + rtmsg.netmask.sin_len = sizeof(rtmsg.netmask); + rtmsg.netmask.sin_family = AF_INET; + rtmsg.netmask.sin_addr.s_addr = 0; + + rtmsg.genmask.sin_len = sizeof(rtmsg.genmask); + rtmsg.genmask.sin_family = AF_INET; + rtmsg.genmask.sin_addr.s_addr = 0; + + rtmsg.ifp.sdl_family = AF_LINK; + rtmsg.ifp.sdl_len = sizeof(rtmsg.ifp); + link_addr(ifname, &rtmsg.ifp); + + rtmsg.hdr.rtm_msglen = sizeof(rtmsg); + + if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) { + error("Couldn't %s default route: %m", + cmd == 's' ? "add" : "delete"); + close(routes); + return 0; + } + + close(routes); + default_route_gateway = (cmd == 's') ? g : 0; + return 1; +} + +#if RTM_VERSION >= 3 + +/* + * sifproxyarp - Make a proxy ARP entry for the peer. + */ +static struct { + struct rt_msghdr hdr; + struct sockaddr_inarp dst; + struct sockaddr_dl hwa; + char extra[128]; +} arpmsg; + +static int arpmsg_valid; + +int +sifproxyarp(unit, hisaddr) + int unit; + u_int32_t hisaddr; +{ + int routes; + + /* + * Get the hardware address of an interface on the same subnet + * as our local address. + */ + memset(&arpmsg, 0, sizeof(arpmsg)); + if (!get_ether_addr(hisaddr, &arpmsg.hwa)) { + error("Cannot determine ethernet address for proxy ARP"); + return 0; + } + + if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { + error("Couldn't add proxy arp entry: socket: %m"); + return 0; + } + + arpmsg.hdr.rtm_type = RTM_ADD; + arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC; + arpmsg.hdr.rtm_version = RTM_VERSION; + arpmsg.hdr.rtm_seq = ++rtm_seq; + arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY; + arpmsg.hdr.rtm_inits = RTV_EXPIRE; + arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp); + arpmsg.dst.sin_family = AF_INET; + arpmsg.dst.sin_addr.s_addr = hisaddr; + arpmsg.dst.sin_other = SIN_PROXY; + + arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg + + arpmsg.hwa.sdl_len; + if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) { + error("Couldn't add proxy arp entry: %m"); + close(routes); + return 0; + } + + close(routes); + arpmsg_valid = 1; + proxy_arp_addr = hisaddr; + return 1; +} + +/* + * cifproxyarp - Delete the proxy ARP entry for the peer. + */ +int +cifproxyarp(unit, hisaddr) + int unit; + u_int32_t hisaddr; +{ + int routes; + + if (!arpmsg_valid) + return 0; + arpmsg_valid = 0; + + arpmsg.hdr.rtm_type = RTM_DELETE; + arpmsg.hdr.rtm_seq = ++rtm_seq; + + if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { + error("Couldn't delete proxy arp entry: socket: %m"); + return 0; + } + + if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) { + error("Couldn't delete proxy arp entry: %m"); + close(routes); + return 0; + } + + close(routes); + proxy_arp_addr = 0; + return 1; +} + +#else /* RTM_VERSION */ + +/* + * sifproxyarp - Make a proxy ARP entry for the peer. + */ +int +sifproxyarp(unit, hisaddr) + int unit; + u_int32_t hisaddr; +{ + struct arpreq arpreq; + struct { + struct sockaddr_dl sdl; + char space[128]; + } dls; + + BZERO(&arpreq, sizeof(arpreq)); + + /* + * Get the hardware address of an interface on the same subnet + * as our local address. + */ + if (!get_ether_addr(hisaddr, &dls.sdl)) { + error("Cannot determine ethernet address for proxy ARP"); + return 0; + } + + arpreq.arp_ha.sa_len = sizeof(struct sockaddr); + arpreq.arp_ha.sa_family = AF_UNSPEC; + BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen); + 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(sock_fd, SIOCSARP, (caddr_t)&arpreq) < 0) { + error("Couldn't add proxy arp entry: %m"); + return 0; + } + + proxy_arp_addr = hisaddr; + return 1; +} + +/* + * cifproxyarp - Delete the proxy ARP entry for the peer. + */ +int +cifproxyarp(unit, hisaddr) + int unit; + 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(sock_fd, SIOCDARP, (caddr_t)&arpreq) < 0) { + warn("Couldn't delete proxy arp entry: %m"); + return 0; + } + proxy_arp_addr = 0; + return 1; +} +#endif /* RTM_VERSION */ + + +/* + * get_ether_addr - get the hardware address of an interface on the + * the same subnet as ipaddr. + */ +static int +get_ether_addr(ipaddr, hwaddr) + u_int32_t ipaddr; + struct sockaddr_dl *hwaddr; +{ + u_int32_t ina, mask; + struct sockaddr_dl *dla; + struct ifaddrs *ifap, *ifa, *ifp; + + /* + * Scan through looking for an interface with an Internet + * address on the same subnet as `ipaddr'. + */ + if (getifaddrs(&ifap) != 0) { + error("getifaddrs: %m"); + return 0; + } + + for (ifa = ifap; ifa; ifa = ifa->ifa_next) { + if (ifa->ifa_addr->sa_family != AF_INET) + continue; + ina = ((struct sockaddr_in *) ifa->ifa_addr)->sin_addr.s_addr; + /* + * Check that the interface is up, and not point-to-point + * or loopback. + */ + if ((ifa->ifa_flags & + (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP)) + != (IFF_UP|IFF_BROADCAST)) + continue; + /* + * Get its netmask and check that it's on the right subnet. + */ + mask = ((struct sockaddr_in *) ifa->ifa_netmask)->sin_addr.s_addr; + if ((ipaddr & mask) != (ina & mask)) + continue; + break; + } + + if (!ifa) { + freeifaddrs(ifap); + return 0; + } + info("found interface %s for proxy arp", ifa->ifa_name); + + ifp = ifa; + + /* + * Now scan through again looking for a link-level address + * for this interface. + */ + for (ifa = ifap; ifa; ifa = ifa->ifa_next) { + if (strcmp(ifp->ifa_name, ifa->ifa_name) != 0) + continue; + if (ifa->ifa_addr->sa_family != AF_LINK) + continue; + /* + * Found the link-level address - copy it out + */ + dla = (struct sockaddr_dl *) ifa->ifa_addr; + BCOPY(dla, hwaddr, dla->sdl_len); + freeifaddrs(ifap); + return 1; + } + + freeifaddrs(ifap); + return 0; +} + +/* + * get_if_hwaddr - get the hardware address for the specified + * network interface device. + */ +int +get_if_hwaddr(addr, name) + u_char *addr; + char *name; +{ + struct ifreq ifreq; + struct sockaddr_dl *sdl = (struct sockaddr_dl *) &ifreq.ifr_addr; + int fd; + + if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) + return 0; + (void)memset(sdl, 0, sizeof(*sdl)); + sdl->sdl_family = AF_LINK; + (void)strlcpy(ifreq.ifr_name, name, sizeof(ifreq.ifr_name)); + if (ioctl(fd, SIOCGIFADDR, &ifreq) == -1) { + (void)close(fd); + return 0; + } + (void)close(fd); + (void)memcpy(addr, LLADDR(sdl), sdl->sdl_alen); + return sdl->sdl_nlen; +} + +/* + * get_first_ethernet - return the name of the first ethernet-style + * interface on this system. + */ +char * +get_first_ethernet() +{ + static char ifname[IFNAMSIZ]; + struct ifaddrs *ifap, *ifa; + + /* + * Scan through the system's network interfaces. + */ + if (getifaddrs(&ifap) != 0) { + warn("getifaddrs: %m"); + return NULL; + } + for (ifa = ifap; ifa; ifa = ifa->ifa_next) { + /* + * Check the interface's internet address. + */ + if (ifa->ifa_addr->sa_family != AF_INET) + continue; + /* + * Check that the interface is up, and not point-to-point or loopback. + */ + if ((ifa->ifa_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK)) + != IFF_UP) { + strlcpy(ifname, ifa->ifa_name, sizeof(ifname)); + freeifaddrs(ifap); + return ifname; + } + } + freeifaddrs(ifap); + return NULL; +} + +/* + * 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. + */ +u_int32_t +GetMask(addr) + u_int32_t addr; +{ + u_int32_t mask, nmask, ina; + struct ifaddrs *ifap, *ifa; + + 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); + + /* + * Scan through the system's network interfaces. + */ + if (getifaddrs(&ifap) != 0) { + warn("getifaddrs: %m"); + return 0; + } + + for (ifa = ifap; ifa; ifa = ifa->ifa_next) { + /* + * Check the interface's internet address. + */ + if (ifa->ifa_addr->sa_family != AF_INET) + continue; + ina = ((struct sockaddr_in *)ifa->ifa_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. + */ + if ((ifa->ifa_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK)) != IFF_UP) + continue; + /* + * Get its netmask and OR it into our mask. + */ + mask |= ((struct sockaddr_in *)&ifa->ifa_netmask)->sin_addr.s_addr; + } + + freeifaddrs(ifap); + return mask; +} + +/* + * have_route_to - determine if the system has any route to + * a given IP address. + * For demand mode to work properly, we have to ignore routes + * through our own interface. + */ +int have_route_to(u_int32_t addr) +{ + return -1; +} + +/* + * Use the hostid as part of the random number seed. + */ +int +get_host_seed() +{ + return gethostid(); +} + +#if 0 +/* + * lock - create a lock file for the named lock device + */ +#define LOCK_PREFIX "/var/spool/lock/LCK.." + +static char *lock_file; /* name of lock file created */ + +int +lock(dev) + char *dev; +{ + char hdb_lock_buffer[12]; + int fd, pid, n; + char *p; + size_t l; + + if ((p = strrchr(dev, '/')) != NULL) + dev = p + 1; + l = strlen(LOCK_PREFIX) + strlen(dev) + 1; + lock_file = malloc(l); + if (lock_file == NULL) + novm("lock file name"); + slprintf(lock_file, l, "%s%s", 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, hdb_lock_buffer, 11); + if (n <= 0) { + error("Can't read pid from lock file %s", lock_file); + close(fd); + } else { + hdb_lock_buffer[n] = 0; + pid = atoi(hdb_lock_buffer); + if (kill(pid, 0) == -1 && errno == ESRCH) { + /* pid no longer exists - remove the lock file */ + if (unlink(lock_file) == 0) { + close(fd); + notice("Removed stale lock on %s (pid %d)", + dev, pid); + continue; + } else + warn("Couldn't remove stale lock on %s", + dev); + } else + notice("Device %s is locked by pid %d", + dev, pid); + } + close(fd); + } else + error("Can't create lock file %s: %m", lock_file); + free(lock_file); + lock_file = NULL; + return -1; + } + + slprintf(hdb_lock_buffer, sizeof(hdb_lock_buffer), "%10d\n", getpid()); + write(fd, hdb_lock_buffer, 11); + + close(fd); + return 0; +} + +/* + * unlock - remove our lockfile + */ +void +unlock() +{ + if (lock_file) { + unlink(lock_file); + free(lock_file); + lock_file = NULL; + } +} +#endif