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-rw-r--r--usr.sbin/pppd/sys-linux.c830
1 files changed, 0 insertions, 830 deletions
diff --git a/usr.sbin/pppd/sys-linux.c b/usr.sbin/pppd/sys-linux.c
deleted file mode 100644
index 306ae4a..0000000
--- a/usr.sbin/pppd/sys-linux.c
+++ /dev/null
@@ -1,830 +0,0 @@
-/*
- * sys-linux.c - System-dependent procedures for setting up
- * PPP interfaces on Linux systems
- *
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * 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.
- * 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.
- */
-
-/*
- * TODO:
- */
-
-#include <stdio.h>
-#include <syslog.h>
-#include <string.h>
-#include <time.h>
-#include <memory.h>
-#include <utmp.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/errno.h>
-#include <mntent.h>
-
-#include <net/if.h>
-#include <linux/ppp.h>
-#include <linux/route.h>
-#include <linux/if_ether.h>
-#include <netinet/in.h>
-#include <signal.h>
-
-#include "pppd.h"
-#include "ppp.h"
-#include "fsm.h"
-#include "ipcp.h"
-
-static int initdisc = -1; /* Initial TTY discipline */
-static int prev_kdebugflag = 0;
-extern int kdebugflag;
-extern u_long netmask;
-
-#define MAX_IFS 32
-
-/* prototypes */
-void die __ARGS((int));
-
-/*
- * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
- * if it exists.
- */
-
-#define SET_SA_FAMILY(addr, family) \
- memset ((char *) &(addr), '\0', sizeof(addr)); \
- addr.sa_family = (family);
-
-/*
- * set_kdebugflag - Define the debugging level for the kernel
- */
-
-int set_kdebugflag (int requested_level)
-{
- if (ioctl(fd, PPPIOCGDEBUG, &prev_kdebugflag) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCGDEBUG): %m");
- return (0);
- }
-
- if (prev_kdebugflag != requested_level) {
- if (ioctl(fd, PPPIOCSDEBUG, &requested_level) < 0) {
- syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m");
- return (0);
- }
- syslog(LOG_INFO, "set kernel debugging level to %d", requested_level);
- }
- return (1);
-}
-
-/*
- * establish_ppp - Turn the serial port into a ppp interface.
- */
-
-void establish_ppp (void)
-{
- int pppdisc = N_PPP;
- int sig = SIGIO;
-
- if (ioctl(fd, PPPIOCSINPSIG, &sig) == -1) {
- syslog(LOG_ERR, "ioctl(PPPIOCSINPSIG): %m");
- die(1);
- }
-
- if (ioctl(fd, TIOCEXCL, 0) < 0) {
- syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m");
- }
-
- if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
- syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
- die (1);
- }
-
- if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
- die (1);
- }
-
- if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
- die (1);
- }
-
- set_kdebugflag (kdebugflag);
-}
-
-/*
- * disestablish_ppp - Restore the serial port to normal operation.
- * This shouldn't call die() because it's called from die().
- */
-
-void disestablish_ppp(void)
-{
- int x;
- char *s;
-
- if (initdisc >= 0) {
- set_kdebugflag (prev_kdebugflag);
- /*
- * Check whether the link seems not to be 8-bit clean.
- */
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
- 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 (ioctl(fd, TIOCSETD, &initdisc) < 0)
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
-
- if (ioctl(fd, TIOCNXCL, 0) < 0)
- syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m");
-
- initdisc = -1;
- }
-}
-
-/*
- * output - Output PPP packet.
- */
-
-void output (int unit, unsigned char *p, int len)
-{
- if (unit != 0)
- MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
-
- if (debug)
- log_packet(p, len, "sent ");
-
- if (write(fd, p, len) < 0) {
- syslog(LOG_ERR, "write: %m");
- die(1);
- }
-}
-
-/*
- * read_packet - get a PPP packet from the serial device.
- */
-
-int read_packet (unsigned char *buf)
-{
- int len;
-
- len = read(fd, buf, MTU + DLLHEADERLEN);
- if (len < 0) {
- if (errno == EWOULDBLOCK) {
-#if 0
- MAINDEBUG((LOG_DEBUG, "read(fd): EWOULDBLOCK"));
-#endif
- return -1;
- }
- syslog(LOG_ERR, "read(fd): %m");
- die(1);
- }
- return len;
-}
-
-/*
- * ppp_send_config - configure the transmit characteristics of
- * the ppp interface.
- */
-void ppp_send_config (int unit,int mtu,u_long asyncmap,int pcomp,int accomp)
-{
- u_int x;
- struct ifreq ifr;
-
- MAINDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu));
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- ifr.ifr_mtu = mtu;
- if (ioctl(s, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
- quit();
- }
-
- MAINDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
- if (ioctl(fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
- quit();
- }
-
- if (ioctl(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;
-
- MAINDEBUG ((LOG_DEBUG, "send_config: flags = %x\n", x));
- if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- quit();
- }
-}
-
-/*
- * ppp_set_xaccm - set the extended transmit ACCM for the interface.
- */
-void
-ppp_set_xaccm(unit, accm)
- int unit;
- ext_accm accm;
-{
- MAINDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n",
- accm[0], accm[1], accm[2], accm[3]));
- if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
- syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
-}
-
-/*
- * ppp_recv_config - configure the receive-side characteristics of
- * the ppp interface.
- */
-void ppp_recv_config (int unit,int mru,u_long asyncmap,int pcomp,int accomp)
-{
- u_int x;
-
- MAINDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
- if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
- syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
-
- MAINDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
- if (ioctl(fd, PPPIOCRASYNCMAP, (caddr_t) &asyncmap) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCRASYNCMAP): %m");
- quit();
- }
-
- if (ioctl(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;
- MAINDEBUG ((LOG_DEBUG, "recv_config: flags = %x\n", x));
- if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- quit();
- }
-}
-
-/*
- * sifvjcomp - config tcp header compression
- */
-
-int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
-{
- u_int x;
-
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
- return 0;
- }
-
- x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP;
- x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID;
-
- if(ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- return 0;
- }
-
- if (vjcomp) {
- if (ioctl (fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
- syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- return 0;
- }
- }
-
- return 1;
-}
-
-/*
- * sifup - Config the interface up and enable IP packets to pass.
- */
-
-int sifup (int u)
-{
- struct ifreq ifr;
-
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
- return 0;
- }
-
- ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
- return 0;
- }
- return 1;
-}
-
-/*
- * sifdown - Config the interface down and disable IP.
- */
-
-int sifdown (int u)
-{
- struct ifreq ifr;
-
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
- return 0;
- }
-
- ifr.ifr_flags &= ~IFF_UP;
- ifr.ifr_flags |= IFF_POINTOPOINT;
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
- return 0;
- }
- return 1;
-}
-
-/*
- * sifaddr - Config the interface IP addresses and netmask.
- */
-
-int sifaddr (int unit, int our_adr, int his_adr, int net_mask)
-{
- struct ifreq ifr;
- struct rtentry rt;
-
- SET_SA_FAMILY (ifr.ifr_addr, AF_INET);
- SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET);
- SET_SA_FAMILY (ifr.ifr_netmask, AF_INET);
-
- strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
-/*
- * Set our IP address
- */
- ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = our_adr;
- if (ioctl(s, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
- if (errno != EEXIST)
- syslog (LOG_ERR, "ioctl(SIOCAIFADDR): %m");
- else
- syslog (LOG_WARNING, "ioctl(SIOCAIFADDR): Address already exists");
- return (0);
- }
-/*
- * Set the gateway address
- */
- ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = his_adr;
- if (ioctl(s, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
- return (0);
- }
-/*
- * Set the netmask
- */
- if (net_mask != 0) {
- ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask;
- if (ioctl(s, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
- return (0);
- }
- }
-/*
- * Add the device route
- */
- memset (&rt, '\0', sizeof (rt));
-
- SET_SA_FAMILY (rt.rt_dst, AF_INET);
- SET_SA_FAMILY (rt.rt_gateway, AF_INET);
- rt.rt_dev = ifname; /* MJC */
-
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0;
- ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
- rt.rt_flags = RTF_UP | RTF_HOST;
-
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m");
- return (0);
- }
- return 1;
-}
-
-/*
- * cifaddr - Clear the interface IP addresses, and delete routes
- * through the interface if possible.
- */
-
-int cifaddr (int unit, int our_adr, int his_adr)
-{
- struct rtentry rt;
-/*
- * Delete the route through the device
- */
- memset (&rt, '\0', sizeof (rt));
-
- SET_SA_FAMILY (rt.rt_dst, AF_INET);
- SET_SA_FAMILY (rt.rt_gateway, AF_INET);
- rt.rt_dev = ifname; /* MJC */
-
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0;
- ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
- rt.rt_flags = RTF_UP | RTF_HOST;
-
- if (ioctl(s, SIOCDELRT, &rt) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m");
- return (0);
- }
- return 1;
-}
-
-/*
- * path_to_route - determine the path to the proc file system data
- */
-
-FILE *route_fd = (FILE *) 0;
-static char route_buffer [100];
-
-static char *path_to_route (void);
-static int open_route_table (void);
-static void close_route_table (void);
-static int read_route_table (struct rtentry *rt);
-static int defaultroute_exists (void);
-
-/*
- * path_to_route - find the path to the route tables in the proc file system
- */
-
-static char *path_to_route (void)
-{
- struct mntent *mntent;
- FILE *fp;
-
- fp = fopen (MOUNTED, "r");
- if (fp != 0) {
- while ((mntent = getmntent (fp)) != 0) {
- if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) == 0)
- continue;
-
- if (strcmp (mntent->mnt_type, "proc") == 0) {
- strncpy (route_buffer, mntent->mnt_dir,
- sizeof (route_buffer)-10);
- route_buffer [sizeof (route_buffer)-10] = '\0';
- strcat (route_buffer, "/net/route");
-
- fclose (fp);
- return (route_buffer);
- }
- }
- fclose (fp);
- }
- syslog (LOG_ERR, "proc file system not mounted");
- return 0;
-}
-
-/*
- * open_route_table - open the interface to the route table
- */
-
-static int open_route_table (void)
-{
- char *path;
-
- if (route_fd != (FILE *) 0)
- close_route_table();
-
- path = path_to_route();
- if (path == NULL)
- return 0;
-
- route_fd = fopen (path, "r");
- if (route_fd == (FILE *) 0) {
- syslog (LOG_ERR, "can not open %s: %m", path);
- return 0;
- }
-
- /* read and discard the header line. */
- if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0) {
- close_route_table();
- return 0;
- }
- return 1;
-}
-
-/*
- * close_route_table - close the interface to the route table
- */
-
-static void close_route_table (void)
-{
- if (route_fd != (FILE *) 0) {
- fclose (route_fd);
- route_fd = (FILE *) 0;
- }
-}
-
-/*
- * read_route_table - read the next entry from the route table
- */
-
-static int read_route_table (struct rtentry *rt)
-{
- static char delims[] = " \t\n";
- char *dev_ptr, *ptr, *dst_ptr, *gw_ptr, *flag_ptr;
-
- if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
- return 0;
-
- memset (rt, '\0', sizeof (struct rtentry));
-
- dev_ptr = strtok (route_buffer, delims); /* interface name */
- dst_ptr = strtok (NULL, delims); /* destination address */
- gw_ptr = strtok (NULL, delims); /* gateway */
- flag_ptr = strtok (NULL, delims); /* flags */
-#if 0
- ptr = strtok (NULL, delims); /* reference count */
- ptr = strtok (NULL, delims); /* useage count */
- ptr = strtok (NULL, delims); /* metric */
- ptr = strtok (NULL, delims); /* mask */
-#endif
-
- ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
- strtoul (dst_ptr, NULL, 16);
-
- ((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr =
- strtoul (gw_ptr, NULL, 16);
-
- rt->rt_flags = (short) strtoul (flag_ptr, NULL, 16);
- rt->rt_dev = dev_ptr;
-
- return 1;
-}
-
-/*
- * defaultroute_exists - determine if there is a default route
- */
-
-static int defaultroute_exists (void)
-{
- struct rtentry rt;
- int result = 0;
-
- if (!open_route_table())
- return 0;
-
- while (read_route_table(&rt) != 0) {
- if (rt.rt_flags & RTF_UP == 0)
- continue;
-
- if (((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr == 0L) {
- syslog (LOG_ERR,
- "ppp not replacing existing default route to %s[%s]",
- rt.rt_dev,
- inet_ntoa (((struct sockaddr_in *) &rt.rt_gateway)->
- sin_addr.s_addr));
- result = 1;
- break;
- }
- }
- close_route_table();
- return result;
-}
-
-/*
- * sifdefaultroute - assign a default route through the address given.
- */
-
-int sifdefaultroute (int unit, int gateway)
-{
- struct rtentry rt;
-
- if (defaultroute_exists())
- return 0;
-
- memset (&rt, '\0', 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 = gateway;
-
- rt.rt_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
- syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m");
- return 0;
- }
- return 1;
-}
-
-/*
- * cifdefaultroute - delete a default route through the address given.
- */
-
-int cifdefaultroute (int unit, int gateway)
-{
- struct rtentry 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 = gateway;
-
- rt.rt_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(s, SIOCDELRT, &rt) < 0) {
- syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m");
- return 0;
- }
- return 1;
-}
-
-/*
- * sifproxyarp - Make a proxy ARP entry for the peer.
- */
-
-int sifproxyarp (int unit, u_long his_adr)
-{
- struct arpreq arpreq;
-
- memset (&arpreq, '\0', sizeof(arpreq));
-/*
- * Get the hardware address of an interface on the same subnet
- * as our local address.
- */
- if (!get_ether_addr(his_adr, &arpreq.arp_ha)) {
- syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
- return 0;
- }
-
- SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
- arpreq.arp_flags = ATF_PERM | ATF_PUBL;
-
- if (ioctl(s, SIOCSARP, (caddr_t)&arpreq) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
- return 0;
- }
- return 1;
-}
-
-/*
- * cifproxyarp - Delete the proxy ARP entry for the peer.
- */
-
-int cifproxyarp (int unit, u_long his_adr)
-{
- struct arpreq arpreq;
-
- memset (&arpreq, '\0', sizeof(arpreq));
- SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
-
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
- if (ioctl(s, SIOCDARP, (caddr_t)&arpreq) < 0) {
- syslog(LOG_WARNING, "ioctl(SIOCDARP): %m");
- return 0;
- }
- return 1;
-}
-
-/*
- * get_ether_addr - get the hardware address of an interface on the
- * the same subnet as ipaddr.
- */
-
-int get_ether_addr (u_long ipaddr, struct sockaddr *hwaddr)
-{
- struct ifreq *ifr, *ifend, *ifp;
- int i;
- u_long ina, mask;
- struct sockaddr_dl *dla;
- struct ifreq ifreq;
- struct ifconf ifc;
- struct ifreq ifs[MAX_IFS];
-
- ifc.ifc_len = sizeof(ifs);
- ifc.ifc_req = ifs;
- if (ioctl(s, SIOCGIFCONF, &ifc) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
- return 0;
- }
- MAINDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s",
- ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr)));
-/*
- * Scan through looking for an interface with an Internet
- * address on the same subnet as `ipaddr'.
- */
- ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
- for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
- 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));
- MAINDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
- ifreq.ifr_name));
-/*
- * Check that the interface is up, and not point-to-point
- * or loopback.
- */
- if (ioctl(s, SIOCGIFFLAGS, &ifreq) < 0)
- continue;
- if ((ifreq.ifr_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.
- */
- if (ioctl(s, SIOCGIFNETMASK, &ifreq) < 0)
- continue;
- mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
- MAINDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
- ip_ntoa(ina), ntohl(mask)));
- if (((ipaddr ^ ina) & mask) != 0)
- continue;
- break;
- }
- }
-
- if (ifr >= ifend)
- return 0;
-
- syslog(LOG_INFO, "found interface %s for proxy arp", ifreq.ifr_name);
-/*
- * Now get the hardware address.
- */
- if (ioctl (s, SIOCGIFHWADDR, &ifreq) < 0) {
- syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m", ifreq.ifr_name);
- return 0;
- }
-
- hwaddr->sa_family = ARPHRD_ETHER;
-#ifndef old_ifr_hwaddr
- memcpy (&hwaddr->sa_data, &ifreq.ifr_hwaddr, ETH_ALEN);
-#else
- memcpy (&hwaddr->sa_data, &ifreq.ifr_hwaddr.sa_data, ETH_ALEN);
-#endif
-
- MAINDEBUG ((LOG_DEBUG,
- "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x",
- (int) ((unsigned char *) &hwaddr->sa_data)[0],
- (int) ((unsigned char *) &hwaddr->sa_data)[1],
- (int) ((unsigned char *) &hwaddr->sa_data)[2],
- (int) ((unsigned char *) &hwaddr->sa_data)[3],
- (int) ((unsigned char *) &hwaddr->sa_data)[4],
- (int) ((unsigned char *) &hwaddr->sa_data)[5]));
- 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(void)
-{
- int s, ok;
- struct ifreq ifr;
-
- s = socket(AF_INET, SOCK_DGRAM, 0);
- if (s < 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;
-}
-
-int
-logwtmp(line, name, host)
- char *line, *name, *host;
-{
- struct utmp ut;
-
- memset (&ut, 0, sizeof (ut));
- (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
- (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
- (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
- (void)time(&ut.ut_time);
-
- pututline (&ut); /* Write the line to the proper place */
- endutent(); /* Indicate operation is complete */
-}
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