summaryrefslogtreecommitdiffstats
path: root/cpukit/pppd/sys-rtems.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--cpukit/pppd/sys-rtems.c1322
1 files changed, 1322 insertions, 0 deletions
diff --git a/cpukit/pppd/sys-rtems.c b/cpukit/pppd/sys-rtems.c
new file mode 100644
index 0000000000..bfc80d50a6
--- /dev/null
+++ b/cpukit/pppd/sys-rtems.c
@@ -0,0 +1,1322 @@
+/*
+ * sys-bsd.c - System-dependent procedures for setting up
+ * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.)
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * Copyright (c) 1995 The Australian National University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * 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 and The Australian National University.
+ * The names of the Universities may not be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#define RCSID "$Id$"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#ifdef PPP_FILTER
+#include <net/bpf.h>
+#endif
+
+#include <net/if.h>
+#include <net/ppp_defs.h>
+#include <net/if_ppp.h>
+#include <net/route.h>
+#include <net/if_dl.h>
+#include <netinet/in.h>
+
+#if RTM_VERSION >= 3
+#include <sys/param.h>
+#if defined(NetBSD) && (NetBSD >= 199703)
+#include <netinet/if_inarp.h>
+#else /* NetBSD 1.2D or later */
+#include <netinet/if_ether.h>
+#endif
+#endif
+
+#include <rtems.h>
+#include <rtems/rtems_bsdnet.h>
+#include <rtems/termiostypes.h>
+extern int rtems_bsdnet_microseconds_per_tick;
+extern rtems_id rtems_pppd_taskid;
+
+#include "pppd.h"
+#include "fsm.h"
+#include "ipcp.h"
+
+static const char rcsid[] = RCSID;
+
+
+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 unsigned char inbuf[512]; /* buffer for chars read from loopback */
+
+static int sockfd; /* socket for doing interface ioctls */
+
+static int if_is_up; /* the interface is currently up */
+static u_int32_t ifaddrs[2]; /* local and remote addresses 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 dodefaultroute __P((u_int32_t, int));
+static int get_ether_addr __P((u_int32_t, struct sockaddr_dl *));
+
+
+void
+sys_serialcallback(struct termios *tty, void *arg)
+{
+ rtems_event_send(rtems_pppd_taskid, RTEMS_EVENT_31);
+}
+
+/*
+ * sys_init - System-dependent initialization.
+ */
+void
+sys_init()
+{
+ /* Get an internet socket for doing socket ioctl's on. */
+ if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+ fatal("Couldn't create IP socket: %m");
+}
+
+/*
+ * 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(sockfd, SIOCGIFFLAGS, &ifr) >= 0
+ && ((ifr.ifr_flags & IFF_UP) != 0)) {
+ ifr.ifr_flags &= ~IFF_UP;
+ ioctl(sockfd, 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(sockfd);
+ if (loop_slave >= 0) {
+ close(loop_slave);
+ close(loop_master);
+ }
+}
+
+/*
+ * sys_check_options - check the options that the user specified
+ */
+int
+sys_check_options()
+{
+ 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()
+{
+ int s, ok;
+ struct ifreq ifr;
+
+ if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+ return 1; /* can't tell */
+
+ strlcpy(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.
+ */
+int
+establish_ppp(fd)
+ int fd;
+{
+ int pppdisc = PPPDISC;
+ int x;
+
+ 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, &pppifunit) < 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 != pppifunit)
+ fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x);
+ x = TTYDISC;
+ ioctl(loop_slave, TIOCSETD, &x);
+ }
+
+ ppp_fd = fd;
+
+ /*
+ * Enable debug in the driver if requested.
+ */
+ if (kdebugflag) {
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ warn("ioctl (PPPIOCGFLAGS): %m");
+ } else {
+ x |= (kdebugflag & 0xFF) * SC_DEBUG;
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+ warn("ioctl(PPPIOCSFLAGS): %m");
+ }
+ }
+
+ /*
+ * 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.
+ */
+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 != pppifunit)
+ fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x);
+ ppp_fd = loop_slave;
+}
+
+
+/*
+ * disestablish_ppp - Restore the serial port to normal operation.
+ * This shouldn't call die() because it's called from die().
+ */
+void
+disestablish_ppp(fd)
+ int fd;
+{
+ /* 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;
+
+ /* Restore old line discipline. */
+ if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
+ error("ioctl(TIOCSETD): %m");
+ initdisc = -1;
+
+ if (fd == ppp_fd)
+ ppp_fd = -1;
+}
+
+/*
+ * Check whether the link seems not to be 8-bit clean.
+ */
+void
+clean_check()
+{
+ int x;
+ char *s;
+
+ if (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) {
+ warn("Serial link is not 8-bit clean:");
+ warn("All received characters had %s", s);
+ }
+ }
+}
+
+/*
+ * 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;
+ struct ttywakeup wakeup;
+
+ 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) { */
+ if (tcsetattr(fd, TCSADRAIN, &tios) < 0) {
+ fatal("tcsetattr: %m");
+ }
+
+ /* set up callback function */
+ wakeup.sw_pfn = sys_serialcallback;
+ wakeup.sw_arg = (void *)fd;
+ ioctl(fd, RTEMS_IO_RCVWAKEUP, &wakeup);
+
+ 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 (tcsetattr(fd, TCSADRAIN, &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);
+}
+
+/*
+ * 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;
+{
+ 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()
+{
+ 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;
+{
+ rtems_interval ticks;
+ rtems_event_set events;
+
+ ticks = ((timo->tv_sec*1000000)+timo->tv_usec)/rtems_bsdnet_microseconds_per_tick;
+ if ( ticks > 0 ) {
+ rtems_event_receive(RTEMS_EVENT_31, (RTEMS_EVENT_ANY|RTEMS_WAIT), ticks, &events);
+ }
+}
+
+/*
+ * 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;
+}
+
+
+/*
+ * ppp_send_config - configure the transmit characteristics of
+ * the ppp interface.
+ */
+void
+ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
+ int unit, mtu;
+ u_int32_t asyncmap;
+ int pcomp, accomp;
+{
+ u_int x;
+ struct ifreq ifr;
+
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ ifr.ifr_mtu = mtu;
+ if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
+ fatal("ioctl(SIOCSIFMTU): %m");
+
+ if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
+ fatal("ioctl(PPPIOCSASYNCMAP): %m");
+
+ if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
+ fatal("ioctl (PPPIOCGFLAGS): %m");
+ 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; */
+ if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+ fatal("ioctl(PPPIOCSFLAGS): %m");
+}
+
+
+/*
+ * ppp_set_xaccm - set the extended transmit ACCM for the interface.
+ */
+void
+ppp_set_xaccm(unit, accm)
+ int unit;
+ 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
+ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
+ int unit, 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");
+ if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
+ fatal("ioctl (PPPIOCGFLAGS): %m");
+ x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
+ if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+ fatal("ioctl(PPPIOCSFLAGS): %m");
+}
+
+/*
+ * ccp_test - ask kernel whether a given compression method
+ * is acceptable for use. Returns 1 if the method and parameters
+ * are OK, 0 if the method is known but the parameters are not OK
+ * (e.g. code size should be reduced), or -1 if the method is unknown.
+ */
+int
+ccp_test(unit, opt_ptr, opt_len, for_transmit)
+ int unit, opt_len, for_transmit;
+ u_char *opt_ptr;
+{
+ struct ppp_option_data data;
+
+ data.ptr = opt_ptr;
+ data.length = opt_len;
+ data.transmit = for_transmit;
+ if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
+ return 1;
+ return (errno == ENOBUFS)? 0: -1;
+}
+
+/*
+ * ccp_flags_set - inform kernel about the current state of CCP.
+ */
+void
+ccp_flags_set(unit, isopen, isup)
+ int unit, isopen, isup;
+{
+ int x;
+
+ if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ error("ioctl (PPPIOCGFLAGS): %m");
+ return;
+ }
+ x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
+ x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
+ if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+ error("ioctl(PPPIOCSFLAGS): %m");
+}
+
+/*
+ * ccp_fatal_error - returns 1 if decompression was disabled as a
+ * result of an error detected after decompression of a packet,
+ * 0 otherwise. This is necessary because of patent nonsense.
+ */
+int
+ccp_fatal_error(unit)
+ int unit;
+{
+ int x;
+
+ if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ error("ioctl(PPPIOCGFLAGS): %m");
+ return 0;
+ }
+ return x & SC_DC_FERROR;
+}
+
+/*
+ * get_idle_time - return how long the link has been idle.
+ */
+int
+get_idle_time(u, ip)
+ int u;
+ struct ppp_idle *ip;
+{
+ return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
+}
+
+/*
+ * 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(sockfd, 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, active)
+ struct bpf_program *pass, *active;
+{
+ int ret = 1;
+
+ if (pass->bf_len > 0) {
+ if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) {
+ error("Couldn't set pass-filter in kernel: %m");
+ ret = 0;
+ }
+ }
+ if (active->bf_len > 0) {
+ if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) {
+ error("Couldn't set active-filter 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;
+
+ if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ error("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(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+ error("ioctl(PPPIOCSFLAGS): %m");
+ return 0;
+ }
+ if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
+ error("ioctl(PPPIOCSFLAGS): %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(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ error("ioctl (SIOCGIFFLAGS): %m");
+ return 0;
+ }
+ ifr.ifr_flags |= IFF_UP;
+ if (ioctl(sockfd, 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(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ error("ioctl (SIOCGIFFLAGS): %m");
+ rv = 0;
+ } else {
+ ifr.ifr_flags &= ~IFF_UP;
+ if (ioctl(sockfd, 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(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) {
+ if (errno != EADDRNOTAVAIL)
+ warn("Couldn't remove interface address: %m");
+ }
+ if (ioctl(sockfd, 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(sockfd, 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');
+}
+
+/*
+ * dodefaultroute - talk to a routing socket to add/delete a default route.
+ */
+static int
+dodefaultroute(g, cmd)
+ u_int32_t g;
+ int cmd;
+{
+ int status;
+ struct sockaddr_in address;
+ struct sockaddr_in netmask;
+ struct sockaddr_in gateway;
+
+ memset((void *) &address, 0, sizeof(address));
+ address.sin_len = sizeof address;
+ address.sin_family = AF_INET;
+ address.sin_addr.s_addr = INADDR_ANY;
+
+ memset((void *) &netmask, 0, sizeof(netmask));
+ netmask.sin_len = sizeof netmask;
+ netmask.sin_addr.s_addr = INADDR_ANY;
+ netmask.sin_family = AF_INET;
+
+ if (cmd=='s') {
+ memset((void *) &gateway, 0, sizeof(gateway));
+ gateway.sin_len = sizeof gateway;
+ gateway.sin_family = AF_INET;
+ gateway.sin_addr.s_addr = g;
+
+ rtems_bsdnet_rtrequest(RTM_ADD,
+ (struct sockaddr *)&address,
+ (struct sockaddr *)&gateway,
+ (struct sockaddr *)&netmask,
+ (RTF_UP|RTF_GATEWAY|RTF_STATIC), NULL);
+ }
+ else {
+ memset((void *) &gateway, 0, sizeof(gateway));
+ gateway.sin_len = sizeof gateway;
+ gateway.sin_family = AF_INET;
+ gateway.sin_addr.s_addr = INADDR_ANY;
+
+ rtems_bsdnet_rtrequest(RTM_DELETE,
+ (struct sockaddr *)&address,
+ (struct sockaddr *)&gateway,
+ (struct sockaddr *)&netmask,
+ (RTF_UP|RTF_STATIC), NULL);
+ }
+
+ 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(sockfd, 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(sockfd, 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.
+ */
+#define MAX_IFS 32
+
+static int
+get_ether_addr(ipaddr, hwaddr)
+ u_int32_t ipaddr;
+ struct sockaddr_dl *hwaddr;
+{
+ struct ifreq *ifr, *ifend, *ifp;
+ u_int32_t 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(sockfd, SIOCGIFCONF, &ifc) < 0) {
+ error("ioctl(SIOCGIFCONF): %m");
+ return 0;
+ }
+
+ /*
+ * Scan through looking for an interface with an Internet
+ * address on the same subnet as `ipaddr'.
+ */
+ ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
+ for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
+ ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
+ if (ifr->ifr_addr.sa_family == AF_INET) {
+ ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
+ strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
+ /*
+ * Check that the interface is up, and not point-to-point
+ * or loopback.
+ */
+ if (ioctl(sockfd, 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(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
+ continue;
+ mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
+ if ((ipaddr & mask) != (ina & mask))
+ continue;
+
+ break;
+ }
+ }
+
+ if (ifr >= ifend)
+ return 0;
+ info("found interface %s for proxy arp", ifr->ifr_name);
+
+ /*
+ * Now scan through again looking for a link-level 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_LINK) {
+ /*
+ * Found the link-level address - copy it out
+ */
+ dla = (struct sockaddr_dl *) &ifr->ifr_addr;
+ BCOPY(dla, hwaddr, dla->sdl_len);
+ return 1;
+ }
+ ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
+ }
+
+ return 0;
+}
+
+/*
+ * 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 ifreq *ifr, *ifend, ifreq;
+ struct ifconf ifc;
+ struct ifreq ifs[MAX_IFS];
+
+ 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.
+ */
+ ifc.ifc_len = sizeof(ifs);
+ ifc.ifc_req = ifs;
+ if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
+ warn("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 + ifr->ifr_addr.sa_len)) {
+ /*
+ * 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.
+ */
+ strlcpy(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 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 17;
+}