[d0950ad] | 1 | /* |
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| 2 | * sys-bsd.c - System-dependent procedures for setting up |
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[2f1b930] | 3 | * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.) |
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[d0950ad] | 4 | * |
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| 5 | * Copyright (c) 1989 Carnegie Mellon University. |
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| 6 | * Copyright (c) 1995 The Australian National University. |
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| 7 | * All rights reserved. |
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| 8 | * |
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| 9 | * Redistribution and use in source and binary forms are permitted |
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| 10 | * provided that the above copyright notice and this paragraph are |
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| 11 | * duplicated in all such forms and that any documentation, |
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| 12 | * advertising materials, and other materials related to such |
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| 13 | * distribution and use acknowledge that the software was developed |
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| 14 | * by Carnegie Mellon University and The Australian National University. |
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| 15 | * The names of the Universities may not be used to endorse or promote |
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| 16 | * products derived from this software without specific prior written |
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| 17 | * permission. |
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| 18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 19 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 20 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 21 | */ |
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| 22 | |
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[2f1b930] | 23 | #define RCSID "$Id$" |
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[d0950ad] | 24 | |
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| 25 | #include <stdio.h> |
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| 26 | #include <string.h> |
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[2f1b930] | 27 | #include <stdlib.h> |
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[d0950ad] | 28 | #include <unistd.h> |
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| 29 | #include <errno.h> |
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| 30 | #include <fcntl.h> |
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| 31 | #include <termios.h> |
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| 32 | #include <signal.h> |
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| 33 | #include <sys/ioctl.h> |
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| 34 | #include <sys/types.h> |
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| 35 | #include <sys/socket.h> |
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| 36 | #include <sys/time.h> |
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| 37 | #include <sys/stat.h> |
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| 38 | #include <sys/param.h> |
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| 39 | #ifdef PPP_FILTER |
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| 40 | #include <net/bpf.h> |
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| 41 | #endif |
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| 42 | |
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| 43 | #include <net/if.h> |
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| 44 | #include <net/ppp_defs.h> |
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| 45 | #include <net/if_ppp.h> |
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| 46 | #include <net/route.h> |
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| 47 | #include <net/if_dl.h> |
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| 48 | #include <netinet/in.h> |
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| 49 | |
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| 50 | #if RTM_VERSION >= 3 |
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| 51 | #include <sys/param.h> |
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| 52 | #if defined(NetBSD) && (NetBSD >= 199703) |
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| 53 | #include <netinet/if_inarp.h> |
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| 54 | #else /* NetBSD 1.2D or later */ |
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| 55 | #include <netinet/if_ether.h> |
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| 56 | #endif |
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| 57 | #endif |
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| 58 | |
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[2f1b930] | 59 | #include <rtems.h> |
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| 60 | #include <rtems/rtems_bsdnet.h> |
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| 61 | #include <rtems/termiostypes.h> |
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| 62 | extern int rtems_bsdnet_microseconds_per_tick; |
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| 63 | extern rtems_id rtems_pppd_taskid; |
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| 64 | |
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[d0950ad] | 65 | #include "pppd.h" |
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| 66 | #include "fsm.h" |
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| 67 | #include "ipcp.h" |
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| 68 | |
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[2f1b930] | 69 | static const char rcsid[] = RCSID; |
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| 70 | |
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| 71 | |
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[d0950ad] | 72 | static int initdisc = -1; /* Initial TTY discipline for ppp_fd */ |
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| 73 | static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */ |
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| 74 | static int ppp_fd = -1; /* fd which is set to PPP discipline */ |
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| 75 | static int rtm_seq; |
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| 76 | |
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| 77 | static int restore_term; /* 1 => we've munged the terminal */ |
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| 78 | static struct termios inittermios; /* Initial TTY termios */ |
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| 79 | static struct winsize wsinfo; /* Initial window size info */ |
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| 80 | |
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| 81 | static int loop_slave = -1; |
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| 82 | static int loop_master; |
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| 83 | |
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| 84 | static unsigned char inbuf[512]; /* buffer for chars read from loopback */ |
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| 85 | |
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| 86 | static int sockfd; /* socket for doing interface ioctls */ |
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| 87 | |
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| 88 | static int if_is_up; /* the interface is currently up */ |
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| 89 | static u_int32_t ifaddrs[2]; /* local and remote addresses we set */ |
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| 90 | static u_int32_t default_route_gateway; /* gateway addr for default route */ |
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| 91 | static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */ |
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| 92 | |
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| 93 | /* Prototypes for procedures local to this file. */ |
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| 94 | static int dodefaultroute __P((u_int32_t, int)); |
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| 95 | static int get_ether_addr __P((u_int32_t, struct sockaddr_dl *)); |
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| 96 | |
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| 97 | |
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| 98 | /* |
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| 99 | * sys_init - System-dependent initialization. |
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| 100 | */ |
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| 101 | void |
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| 102 | sys_init() |
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| 103 | { |
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| 104 | /* Get an internet socket for doing socket ioctl's on. */ |
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[2f1b930] | 105 | if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
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| 106 | fatal("Couldn't create IP socket: %m"); |
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[d0950ad] | 107 | } |
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| 108 | |
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| 109 | /* |
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| 110 | * sys_cleanup - restore any system state we modified before exiting: |
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| 111 | * mark the interface down, delete default route and/or proxy arp entry. |
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| 112 | * This should call die() because it's called from die(). |
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| 113 | */ |
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| 114 | void |
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| 115 | sys_cleanup() |
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| 116 | { |
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| 117 | struct ifreq ifr; |
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| 118 | |
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| 119 | if (if_is_up) { |
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[2f1b930] | 120 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
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[d0950ad] | 121 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0 |
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| 122 | && ((ifr.ifr_flags & IFF_UP) != 0)) { |
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| 123 | ifr.ifr_flags &= ~IFF_UP; |
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| 124 | ioctl(sockfd, SIOCSIFFLAGS, &ifr); |
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| 125 | } |
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| 126 | } |
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| 127 | if (ifaddrs[0] != 0) |
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| 128 | cifaddr(0, ifaddrs[0], ifaddrs[1]); |
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| 129 | if (default_route_gateway) |
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| 130 | cifdefaultroute(0, 0, default_route_gateway); |
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| 131 | if (proxy_arp_addr) |
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| 132 | cifproxyarp(0, proxy_arp_addr); |
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| 133 | } |
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| 134 | |
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| 135 | /* |
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| 136 | * sys_close - Clean up in a child process before execing. |
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| 137 | */ |
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| 138 | void |
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| 139 | sys_close() |
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| 140 | { |
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| 141 | close(sockfd); |
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| 142 | if (loop_slave >= 0) { |
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| 143 | close(loop_slave); |
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| 144 | close(loop_master); |
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| 145 | } |
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| 146 | } |
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| 147 | |
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| 148 | /* |
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| 149 | * sys_check_options - check the options that the user specified |
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| 150 | */ |
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[2f1b930] | 151 | int |
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[d0950ad] | 152 | sys_check_options() |
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| 153 | { |
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[2f1b930] | 154 | return 1; |
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[d0950ad] | 155 | } |
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| 156 | |
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| 157 | /* |
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| 158 | * ppp_available - check whether the system has any ppp interfaces |
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| 159 | * (in fact we check whether we can do an ioctl on ppp0). |
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| 160 | */ |
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| 161 | int |
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| 162 | ppp_available() |
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| 163 | { |
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| 164 | int s, ok; |
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| 165 | struct ifreq ifr; |
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| 166 | |
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| 167 | if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
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| 168 | return 1; /* can't tell */ |
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| 169 | |
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[2f1b930] | 170 | strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name)); |
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[d0950ad] | 171 | ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0; |
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| 172 | close(s); |
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| 173 | |
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| 174 | return ok; |
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| 175 | } |
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| 176 | |
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| 177 | /* |
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| 178 | * establish_ppp - Turn the serial port into a ppp interface. |
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| 179 | */ |
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[2f1b930] | 180 | int |
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[d0950ad] | 181 | establish_ppp(fd) |
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| 182 | int fd; |
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| 183 | { |
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[0286b9f] | 184 | int taskid = (int)rtems_pppd_taskid; |
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[d0950ad] | 185 | int pppdisc = PPPDISC; |
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| 186 | int x; |
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| 187 | |
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| 188 | if (demand) { |
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| 189 | /* |
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| 190 | * Demand mode - prime the old ppp device to relinquish the unit. |
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| 191 | */ |
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[2f1b930] | 192 | if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) |
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| 193 | fatal("ioctl(transfer ppp unit): %m"); |
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[d0950ad] | 194 | } |
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| 195 | |
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| 196 | /* |
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| 197 | * Save the old line discipline of fd, and set it to PPP. |
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| 198 | */ |
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[2f1b930] | 199 | if (ioctl(fd, TIOCGETD, &initdisc) < 0) |
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| 200 | fatal("ioctl(TIOCGETD): %m"); |
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| 201 | if (ioctl(fd, TIOCSETD, &pppdisc) < 0) |
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| 202 | fatal("ioctl(TIOCSETD): %m"); |
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[d0950ad] | 203 | |
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[0286b9f] | 204 | /* set pppd taskid into the driver */ |
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| 205 | ioctl(fd, PPPIOCSTASK, &taskid); |
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| 206 | |
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[d0950ad] | 207 | if (!demand) { |
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| 208 | /* |
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| 209 | * Find out which interface we were given. |
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| 210 | */ |
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[2f1b930] | 211 | if (ioctl(fd, PPPIOCGUNIT, &pppifunit) < 0) |
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| 212 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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[d0950ad] | 213 | } else { |
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| 214 | /* |
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| 215 | * Check that we got the same unit again. |
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| 216 | */ |
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[2f1b930] | 217 | if (ioctl(fd, PPPIOCGUNIT, &x) < 0) |
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| 218 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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| 219 | if (x != pppifunit) |
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| 220 | fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x); |
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[d0950ad] | 221 | x = TTYDISC; |
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| 222 | ioctl(loop_slave, TIOCSETD, &x); |
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| 223 | } |
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| 224 | |
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| 225 | ppp_fd = fd; |
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| 226 | |
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| 227 | /* |
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| 228 | * Enable debug in the driver if requested. |
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| 229 | */ |
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| 230 | if (kdebugflag) { |
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| 231 | if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
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[2f1b930] | 232 | warn("ioctl (PPPIOCGFLAGS): %m"); |
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[d0950ad] | 233 | } else { |
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| 234 | x |= (kdebugflag & 0xFF) * SC_DEBUG; |
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| 235 | if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
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[2f1b930] | 236 | warn("ioctl(PPPIOCSFLAGS): %m"); |
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[d0950ad] | 237 | } |
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| 238 | } |
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| 239 | |
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| 240 | /* |
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| 241 | * Set device for non-blocking reads. |
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| 242 | */ |
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[2f1b930] | 243 | if ((initfdflags = fcntl(fd, F_GETFL)) == -1 |
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[d0950ad] | 244 | || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { |
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[2f1b930] | 245 | warn("Couldn't set device to non-blocking mode: %m"); |
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| 246 | } |
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| 247 | |
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| 248 | return fd; |
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[d0950ad] | 249 | } |
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| 250 | |
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| 251 | /* |
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| 252 | * restore_loop - reattach the ppp unit to the loopback. |
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| 253 | */ |
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| 254 | void |
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| 255 | restore_loop() |
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| 256 | { |
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| 257 | int x; |
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| 258 | |
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| 259 | /* |
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| 260 | * Transfer the ppp interface back to the loopback. |
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| 261 | */ |
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[2f1b930] | 262 | if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) |
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| 263 | fatal("ioctl(transfer ppp unit): %m"); |
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[d0950ad] | 264 | x = PPPDISC; |
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[2f1b930] | 265 | if (ioctl(loop_slave, TIOCSETD, &x) < 0) |
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| 266 | fatal("ioctl(TIOCSETD): %m"); |
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[d0950ad] | 267 | |
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| 268 | /* |
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| 269 | * Check that we got the same unit again. |
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| 270 | */ |
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[2f1b930] | 271 | if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) |
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| 272 | fatal("ioctl(PPPIOCGUNIT): %m"); |
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| 273 | if (x != pppifunit) |
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| 274 | fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x); |
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[d0950ad] | 275 | ppp_fd = loop_slave; |
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| 276 | } |
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| 277 | |
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| 278 | |
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| 279 | /* |
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| 280 | * disestablish_ppp - Restore the serial port to normal operation. |
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| 281 | * This shouldn't call die() because it's called from die(). |
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| 282 | */ |
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| 283 | void |
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| 284 | disestablish_ppp(fd) |
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| 285 | int fd; |
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| 286 | { |
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[0286b9f] | 287 | int taskid = (int)0; |
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| 288 | |
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| 289 | /* clear pppd taskid from the driver */ |
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| 290 | ioctl(fd, PPPIOCSTASK, &taskid); |
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| 291 | |
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[d0950ad] | 292 | /* Reset non-blocking mode on fd. */ |
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[2f1b930] | 293 | if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0) |
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| 294 | warn("Couldn't restore device fd flags: %m"); |
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| 295 | initfdflags = -1; |
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[d0950ad] | 296 | |
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| 297 | /* Restore old line discipline. */ |
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| 298 | if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0) |
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[2f1b930] | 299 | error("ioctl(TIOCSETD): %m"); |
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| 300 | initdisc = -1; |
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[d0950ad] | 301 | |
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| 302 | if (fd == ppp_fd) |
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| 303 | ppp_fd = -1; |
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| 304 | } |
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| 305 | |
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| 306 | /* |
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| 307 | * Check whether the link seems not to be 8-bit clean. |
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| 308 | */ |
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| 309 | void |
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| 310 | clean_check() |
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| 311 | { |
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| 312 | int x; |
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| 313 | char *s; |
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| 314 | |
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| 315 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) { |
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| 316 | s = NULL; |
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| 317 | switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) { |
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| 318 | case SC_RCV_B7_0: |
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| 319 | s = "bit 7 set to 1"; |
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| 320 | break; |
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| 321 | case SC_RCV_B7_1: |
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| 322 | s = "bit 7 set to 0"; |
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| 323 | break; |
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| 324 | case SC_RCV_EVNP: |
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| 325 | s = "odd parity"; |
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| 326 | break; |
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| 327 | case SC_RCV_ODDP: |
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| 328 | s = "even parity"; |
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| 329 | break; |
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| 330 | } |
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[2f1b930] | 331 | if (s != NULL) { |
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| 332 | warn("Serial link is not 8-bit clean:"); |
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| 333 | warn("All received characters had %s", s); |
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[d0950ad] | 334 | } |
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[2f1b930] | 335 | } |
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[d0950ad] | 336 | } |
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| 337 | |
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| 338 | /* |
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| 339 | * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity, |
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| 340 | * at the requested speed, etc. If `local' is true, set CLOCAL |
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| 341 | * regardless of whether the modem option was specified. |
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| 342 | * |
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| 343 | * For *BSD, we assume that speed_t values numerically equal bits/second. |
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| 344 | */ |
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| 345 | void |
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| 346 | set_up_tty(fd, local) |
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| 347 | int fd, local; |
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| 348 | { |
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[2f1b930] | 349 | struct termios tios; |
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[d0950ad] | 350 | |
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[2f1b930] | 351 | if (tcgetattr(fd, &tios) < 0) |
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| 352 | fatal("tcgetattr: %m"); |
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[d0950ad] | 353 | |
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| 354 | if (!restore_term) { |
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| 355 | inittermios = tios; |
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| 356 | ioctl(fd, TIOCGWINSZ, &wsinfo); |
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| 357 | } |
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| 358 | |
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| 359 | tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); |
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[2f1b930] | 360 | if (crtscts > 0 && !local) { |
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| 361 | if (crtscts == 2) { |
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| 362 | #ifdef CDTRCTS |
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| 363 | tios.c_cflag |= CDTRCTS; |
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| 364 | #endif |
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| 365 | } else |
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| 366 | tios.c_cflag |= CRTSCTS; |
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| 367 | } else if (crtscts < 0) { |
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[d0950ad] | 368 | tios.c_cflag &= ~CRTSCTS; |
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[2f1b930] | 369 | #ifdef CDTRCTS |
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| 370 | tios.c_cflag &= ~CDTRCTS; |
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| 371 | #endif |
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| 372 | } |
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[d0950ad] | 373 | |
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| 374 | tios.c_cflag |= CS8 | CREAD | HUPCL; |
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| 375 | if (local || !modem) |
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| 376 | tios.c_cflag |= CLOCAL; |
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| 377 | tios.c_iflag = IGNBRK | IGNPAR; |
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| 378 | tios.c_oflag = 0; |
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| 379 | tios.c_lflag = 0; |
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| 380 | tios.c_cc[VMIN] = 1; |
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| 381 | tios.c_cc[VTIME] = 0; |
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| 382 | |
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| 383 | if (crtscts == -2) { |
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| 384 | tios.c_iflag |= IXON | IXOFF; |
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[2f1b930] | 385 | tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */ |
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| 386 | tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */ |
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[d0950ad] | 387 | } |
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| 388 | |
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| 389 | if (inspeed) { |
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| 390 | cfsetospeed(&tios, inspeed); |
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| 391 | cfsetispeed(&tios, inspeed); |
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| 392 | } else { |
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| 393 | inspeed = cfgetospeed(&tios); |
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| 394 | /* |
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| 395 | * We can't proceed if the serial port speed is 0, |
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| 396 | * since that implies that the serial port is disabled. |
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| 397 | */ |
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[2f1b930] | 398 | if (inspeed == 0) |
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| 399 | fatal("Baud rate for %s is 0; need explicit baud rate", devnam); |
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[d0950ad] | 400 | } |
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[2f1b930] | 401 | baud_rate = inspeed; |
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| 402 | |
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| 403 | /* if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { */ |
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| 404 | if (tcsetattr(fd, TCSADRAIN, &tios) < 0) { |
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| 405 | fatal("tcsetattr: %m"); |
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[d0950ad] | 406 | } |
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| 407 | |
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| 408 | restore_term = 1; |
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| 409 | } |
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| 410 | |
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| 411 | /* |
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| 412 | * restore_tty - restore the terminal to the saved settings. |
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| 413 | */ |
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| 414 | void |
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| 415 | restore_tty(fd) |
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| 416 | int fd; |
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| 417 | { |
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[2f1b930] | 418 | if (restore_term) { |
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[d0950ad] | 419 | if (!default_device) { |
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[2f1b930] | 420 | /* |
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[d0950ad] | 421 | * Turn off echoing, because otherwise we can get into |
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| 422 | * a loop with the tty and the modem echoing to each other. |
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| 423 | * We presume we are the sole user of this tty device, so |
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| 424 | * when we close it, it will revert to its defaults anyway. |
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| 425 | */ |
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[2f1b930] | 426 | inittermios.c_lflag &= ~(ECHO | ECHONL); |
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[d0950ad] | 427 | } |
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[2f1b930] | 428 | /* if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) { */ |
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| 429 | if (tcsetattr(fd, TCSADRAIN, &inittermios) < 0) { |
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[d0950ad] | 430 | if (errno != ENXIO) |
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[2f1b930] | 431 | warn("tcsetattr: %m"); |
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| 432 | } |
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[d0950ad] | 433 | ioctl(fd, TIOCSWINSZ, &wsinfo); |
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| 434 | restore_term = 0; |
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| 435 | } |
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[2f1b930] | 436 | } |
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[d0950ad] | 437 | |
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| 438 | /* |
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[2f1b930] | 439 | * setdtr - control the DTR line on the serial port. |
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[d0950ad] | 440 | * This is called from die(), so it shouldn't call die(). |
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| 441 | */ |
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| 442 | void |
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| 443 | setdtr(fd, on) |
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| 444 | int fd, on; |
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| 445 | { |
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| 446 | int modembits = TIOCM_DTR; |
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| 447 | |
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| 448 | ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); |
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| 449 | } |
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| 450 | |
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[2f1b930] | 451 | /* |
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| 452 | * get_pty - get a pty master/slave pair and chown the slave side |
---|
| 453 | * to the uid given. Assumes slave_name points to >= 12 bytes of space. |
---|
| 454 | */ |
---|
| 455 | int |
---|
| 456 | get_pty(master_fdp, slave_fdp, slave_name, uid) |
---|
| 457 | int *master_fdp; |
---|
| 458 | int *slave_fdp; |
---|
| 459 | char *slave_name; |
---|
| 460 | int uid; |
---|
| 461 | { |
---|
| 462 | return 1; |
---|
| 463 | } |
---|
| 464 | |
---|
[d0950ad] | 465 | |
---|
| 466 | /* |
---|
| 467 | * open_ppp_loopback - open the device we use for getting |
---|
| 468 | * packets in demand mode, and connect it to a ppp interface. |
---|
| 469 | * Here we use a pty. |
---|
| 470 | */ |
---|
[2f1b930] | 471 | int |
---|
[d0950ad] | 472 | open_ppp_loopback() |
---|
| 473 | { |
---|
[2f1b930] | 474 | return loop_master; |
---|
[d0950ad] | 475 | } |
---|
| 476 | |
---|
| 477 | |
---|
| 478 | /* |
---|
| 479 | * output - Output PPP packet. |
---|
| 480 | */ |
---|
| 481 | void |
---|
| 482 | output(unit, p, len) |
---|
| 483 | int unit; |
---|
| 484 | u_char *p; |
---|
| 485 | int len; |
---|
| 486 | { |
---|
| 487 | if (debug); |
---|
[2f1b930] | 488 | dbglog("sent %P", p, len); |
---|
[0286b9f] | 489 | /* printf("sent packet [%d]\n", len); */ |
---|
[d0950ad] | 490 | |
---|
| 491 | if (write(ttyfd, p, len) < 0) { |
---|
[2f1b930] | 492 | if (errno != EIO) |
---|
| 493 | error("write: %m"); |
---|
[d0950ad] | 494 | } |
---|
| 495 | } |
---|
| 496 | |
---|
[0286b9f] | 497 | void |
---|
| 498 | ppp_delay(void) |
---|
| 499 | { |
---|
| 500 | rtems_interval ticks; |
---|
| 501 | |
---|
| 502 | /* recommended delay to help negotiation */ |
---|
| 503 | ticks = 300000/rtems_bsdnet_microseconds_per_tick; |
---|
| 504 | rtems_task_wake_after(ticks); |
---|
| 505 | } |
---|
[d0950ad] | 506 | |
---|
| 507 | /* |
---|
[2f1b930] | 508 | * wait_input - wait until there is data available, |
---|
| 509 | * for the length of time specified by *timo (indefinite |
---|
| 510 | * if timo is NULL). |
---|
[d0950ad] | 511 | */ |
---|
| 512 | void |
---|
[2f1b930] | 513 | wait_input(timo) |
---|
[d0950ad] | 514 | struct timeval *timo; |
---|
| 515 | { |
---|
[2f1b930] | 516 | rtems_interval ticks; |
---|
| 517 | rtems_event_set events; |
---|
[d0950ad] | 518 | |
---|
[2f1b930] | 519 | ticks = ((timo->tv_sec*1000000)+timo->tv_usec)/rtems_bsdnet_microseconds_per_tick; |
---|
| 520 | if ( ticks > 0 ) { |
---|
| 521 | rtems_event_receive(RTEMS_EVENT_31, (RTEMS_EVENT_ANY|RTEMS_WAIT), ticks, &events); |
---|
| 522 | } |
---|
[d0950ad] | 523 | } |
---|
| 524 | |
---|
| 525 | /* |
---|
| 526 | * read_packet - get a PPP packet from the serial device. |
---|
| 527 | */ |
---|
| 528 | int |
---|
| 529 | read_packet(buf) |
---|
| 530 | u_char *buf; |
---|
| 531 | { |
---|
| 532 | int len; |
---|
| 533 | |
---|
| 534 | if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) { |
---|
[0286b9f] | 535 | if (errno == EWOULDBLOCK || errno == EINTR) len = -1; |
---|
[2f1b930] | 536 | /*fatal("read: %m"); */ |
---|
[d0950ad] | 537 | } |
---|
[0286b9f] | 538 | |
---|
| 539 | /* printf("read packet [%d]\n", len); */ |
---|
[d0950ad] | 540 | return len; |
---|
| 541 | } |
---|
| 542 | |
---|
| 543 | |
---|
| 544 | /* |
---|
| 545 | * get_loop_output - read characters from the loopback, form them |
---|
| 546 | * into frames, and detect when we want to bring the real link up. |
---|
| 547 | * Return value is 1 if we need to bring up the link, 0 otherwise. |
---|
| 548 | */ |
---|
| 549 | int |
---|
| 550 | get_loop_output() |
---|
| 551 | { |
---|
| 552 | int rv = 0; |
---|
| 553 | int n; |
---|
| 554 | |
---|
| 555 | while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) { |
---|
| 556 | if (loop_chars(inbuf, n)) |
---|
| 557 | rv = 1; |
---|
| 558 | } |
---|
| 559 | |
---|
[2f1b930] | 560 | if (n == 0) |
---|
| 561 | fatal("eof on loopback"); |
---|
| 562 | if (errno != EWOULDBLOCK) |
---|
| 563 | fatal("read from loopback: %m"); |
---|
[d0950ad] | 564 | |
---|
| 565 | return rv; |
---|
| 566 | } |
---|
| 567 | |
---|
| 568 | |
---|
| 569 | /* |
---|
| 570 | * ppp_send_config - configure the transmit characteristics of |
---|
| 571 | * the ppp interface. |
---|
| 572 | */ |
---|
| 573 | void |
---|
| 574 | ppp_send_config(unit, mtu, asyncmap, pcomp, accomp) |
---|
| 575 | int unit, mtu; |
---|
| 576 | u_int32_t asyncmap; |
---|
| 577 | int pcomp, accomp; |
---|
| 578 | { |
---|
| 579 | u_int x; |
---|
| 580 | struct ifreq ifr; |
---|
| 581 | |
---|
[2f1b930] | 582 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
[d0950ad] | 583 | ifr.ifr_mtu = mtu; |
---|
[2f1b930] | 584 | if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) |
---|
| 585 | fatal("ioctl(SIOCSIFMTU): %m"); |
---|
[d0950ad] | 586 | |
---|
[2f1b930] | 587 | if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) |
---|
| 588 | fatal("ioctl(PPPIOCSASYNCMAP): %m"); |
---|
[d0950ad] | 589 | |
---|
[2f1b930] | 590 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) |
---|
| 591 | fatal("ioctl (PPPIOCGFLAGS): %m"); |
---|
[d0950ad] | 592 | x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT; |
---|
| 593 | x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC; |
---|
[2f1b930] | 594 | /* x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC; */ |
---|
| 595 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
| 596 | fatal("ioctl(PPPIOCSFLAGS): %m"); |
---|
[d0950ad] | 597 | } |
---|
| 598 | |
---|
| 599 | |
---|
| 600 | /* |
---|
| 601 | * ppp_set_xaccm - set the extended transmit ACCM for the interface. |
---|
| 602 | */ |
---|
| 603 | void |
---|
| 604 | ppp_set_xaccm(unit, accm) |
---|
| 605 | int unit; |
---|
| 606 | ext_accm accm; |
---|
| 607 | { |
---|
| 608 | if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) |
---|
[2f1b930] | 609 | warn("ioctl(set extended ACCM): %m"); |
---|
[d0950ad] | 610 | } |
---|
| 611 | |
---|
| 612 | |
---|
| 613 | /* |
---|
| 614 | * ppp_recv_config - configure the receive-side characteristics of |
---|
| 615 | * the ppp interface. |
---|
| 616 | */ |
---|
| 617 | void |
---|
| 618 | ppp_recv_config(unit, mru, asyncmap, pcomp, accomp) |
---|
| 619 | int unit, mru; |
---|
| 620 | u_int32_t asyncmap; |
---|
| 621 | int pcomp, accomp; |
---|
| 622 | { |
---|
| 623 | int x; |
---|
| 624 | |
---|
[2f1b930] | 625 | if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) |
---|
| 626 | fatal("ioctl(PPPIOCSMRU): %m"); |
---|
| 627 | if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) |
---|
| 628 | fatal("ioctl(PPPIOCSRASYNCMAP): %m"); |
---|
| 629 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) |
---|
| 630 | fatal("ioctl (PPPIOCGFLAGS): %m"); |
---|
| 631 | x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC; |
---|
| 632 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
| 633 | fatal("ioctl(PPPIOCSFLAGS): %m"); |
---|
[d0950ad] | 634 | } |
---|
| 635 | |
---|
| 636 | /* |
---|
| 637 | * ccp_test - ask kernel whether a given compression method |
---|
| 638 | * is acceptable for use. Returns 1 if the method and parameters |
---|
| 639 | * are OK, 0 if the method is known but the parameters are not OK |
---|
| 640 | * (e.g. code size should be reduced), or -1 if the method is unknown. |
---|
| 641 | */ |
---|
| 642 | int |
---|
| 643 | ccp_test(unit, opt_ptr, opt_len, for_transmit) |
---|
| 644 | int unit, opt_len, for_transmit; |
---|
| 645 | u_char *opt_ptr; |
---|
| 646 | { |
---|
| 647 | struct ppp_option_data data; |
---|
| 648 | |
---|
| 649 | data.ptr = opt_ptr; |
---|
| 650 | data.length = opt_len; |
---|
| 651 | data.transmit = for_transmit; |
---|
| 652 | if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0) |
---|
| 653 | return 1; |
---|
| 654 | return (errno == ENOBUFS)? 0: -1; |
---|
| 655 | } |
---|
| 656 | |
---|
| 657 | /* |
---|
| 658 | * ccp_flags_set - inform kernel about the current state of CCP. |
---|
| 659 | */ |
---|
| 660 | void |
---|
| 661 | ccp_flags_set(unit, isopen, isup) |
---|
| 662 | int unit, isopen, isup; |
---|
| 663 | { |
---|
| 664 | int x; |
---|
| 665 | |
---|
| 666 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
[2f1b930] | 667 | error("ioctl (PPPIOCGFLAGS): %m"); |
---|
| 668 | return; |
---|
[d0950ad] | 669 | } |
---|
| 670 | x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN; |
---|
| 671 | x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP; |
---|
| 672 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) |
---|
[2f1b930] | 673 | error("ioctl(PPPIOCSFLAGS): %m"); |
---|
[d0950ad] | 674 | } |
---|
| 675 | |
---|
| 676 | /* |
---|
| 677 | * ccp_fatal_error - returns 1 if decompression was disabled as a |
---|
| 678 | * result of an error detected after decompression of a packet, |
---|
| 679 | * 0 otherwise. This is necessary because of patent nonsense. |
---|
| 680 | */ |
---|
| 681 | int |
---|
| 682 | ccp_fatal_error(unit) |
---|
| 683 | int unit; |
---|
| 684 | { |
---|
| 685 | int x; |
---|
| 686 | |
---|
| 687 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
[2f1b930] | 688 | error("ioctl(PPPIOCGFLAGS): %m"); |
---|
[d0950ad] | 689 | return 0; |
---|
| 690 | } |
---|
| 691 | return x & SC_DC_FERROR; |
---|
| 692 | } |
---|
| 693 | |
---|
| 694 | /* |
---|
| 695 | * get_idle_time - return how long the link has been idle. |
---|
| 696 | */ |
---|
| 697 | int |
---|
| 698 | get_idle_time(u, ip) |
---|
| 699 | int u; |
---|
| 700 | struct ppp_idle *ip; |
---|
| 701 | { |
---|
| 702 | return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0; |
---|
| 703 | } |
---|
| 704 | |
---|
[2f1b930] | 705 | /* |
---|
| 706 | * get_ppp_stats - return statistics for the link. |
---|
| 707 | */ |
---|
| 708 | int |
---|
| 709 | get_ppp_stats(u, stats) |
---|
| 710 | int u; |
---|
| 711 | struct pppd_stats *stats; |
---|
| 712 | { |
---|
| 713 | struct ifpppstatsreq req; |
---|
| 714 | |
---|
| 715 | memset (&req, 0, sizeof (req)); |
---|
| 716 | strlcpy(req.ifr_name, ifname, sizeof(req.ifr_name)); |
---|
| 717 | if (ioctl(sockfd, SIOCGPPPSTATS, &req) < 0) { |
---|
| 718 | error("Couldn't get PPP statistics: %m"); |
---|
| 719 | return 0; |
---|
| 720 | } |
---|
| 721 | stats->bytes_in = req.stats.p.ppp_ibytes; |
---|
| 722 | stats->bytes_out = req.stats.p.ppp_obytes; |
---|
| 723 | return 1; |
---|
| 724 | } |
---|
| 725 | |
---|
[d0950ad] | 726 | |
---|
| 727 | #ifdef PPP_FILTER |
---|
| 728 | /* |
---|
| 729 | * set_filters - transfer the pass and active filters to the kernel. |
---|
| 730 | */ |
---|
| 731 | int |
---|
| 732 | set_filters(pass, active) |
---|
| 733 | struct bpf_program *pass, *active; |
---|
| 734 | { |
---|
| 735 | int ret = 1; |
---|
| 736 | |
---|
| 737 | if (pass->bf_len > 0) { |
---|
| 738 | if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) { |
---|
[2f1b930] | 739 | error("Couldn't set pass-filter in kernel: %m"); |
---|
[d0950ad] | 740 | ret = 0; |
---|
| 741 | } |
---|
| 742 | } |
---|
| 743 | if (active->bf_len > 0) { |
---|
| 744 | if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) { |
---|
[2f1b930] | 745 | error("Couldn't set active-filter in kernel: %m"); |
---|
[d0950ad] | 746 | ret = 0; |
---|
| 747 | } |
---|
| 748 | } |
---|
| 749 | return ret; |
---|
| 750 | } |
---|
| 751 | #endif |
---|
| 752 | |
---|
| 753 | /* |
---|
| 754 | * sifvjcomp - config tcp header compression |
---|
| 755 | */ |
---|
| 756 | int |
---|
| 757 | sifvjcomp(u, vjcomp, cidcomp, maxcid) |
---|
| 758 | int u, vjcomp, cidcomp, maxcid; |
---|
| 759 | { |
---|
| 760 | u_int x; |
---|
| 761 | |
---|
| 762 | if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) { |
---|
[2f1b930] | 763 | error("ioctl (PPPIOCGFLAGS): %m"); |
---|
[d0950ad] | 764 | return 0; |
---|
| 765 | } |
---|
| 766 | x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP; |
---|
| 767 | x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID; |
---|
| 768 | if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) { |
---|
[2f1b930] | 769 | error("ioctl(PPPIOCSFLAGS): %m"); |
---|
[d0950ad] | 770 | return 0; |
---|
| 771 | } |
---|
| 772 | if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) { |
---|
[2f1b930] | 773 | error("ioctl(PPPIOCSFLAGS): %m"); |
---|
[d0950ad] | 774 | return 0; |
---|
| 775 | } |
---|
| 776 | return 1; |
---|
| 777 | } |
---|
| 778 | |
---|
| 779 | /* |
---|
| 780 | * sifup - Config the interface up and enable IP packets to pass. |
---|
| 781 | */ |
---|
| 782 | int |
---|
| 783 | sifup(u) |
---|
| 784 | int u; |
---|
| 785 | { |
---|
| 786 | struct ifreq ifr; |
---|
| 787 | |
---|
[2f1b930] | 788 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
[d0950ad] | 789 | if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
[2f1b930] | 790 | error("ioctl (SIOCGIFFLAGS): %m"); |
---|
[d0950ad] | 791 | return 0; |
---|
| 792 | } |
---|
| 793 | ifr.ifr_flags |= IFF_UP; |
---|
| 794 | if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
[2f1b930] | 795 | error("ioctl(SIOCSIFFLAGS): %m"); |
---|
[d0950ad] | 796 | return 0; |
---|
| 797 | } |
---|
| 798 | if_is_up = 1; |
---|
| 799 | return 1; |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | /* |
---|
| 803 | * sifnpmode - Set the mode for handling packets for a given NP. |
---|
| 804 | */ |
---|
| 805 | int |
---|
| 806 | sifnpmode(u, proto, mode) |
---|
| 807 | int u; |
---|
| 808 | int proto; |
---|
| 809 | enum NPmode mode; |
---|
| 810 | { |
---|
| 811 | struct npioctl npi; |
---|
| 812 | |
---|
| 813 | npi.protocol = proto; |
---|
| 814 | npi.mode = mode; |
---|
| 815 | if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) { |
---|
[2f1b930] | 816 | error("ioctl(set NP %d mode to %d): %m", proto, mode); |
---|
[d0950ad] | 817 | return 0; |
---|
| 818 | } |
---|
| 819 | return 1; |
---|
| 820 | } |
---|
| 821 | |
---|
| 822 | /* |
---|
| 823 | * sifdown - Config the interface down and disable IP. |
---|
| 824 | */ |
---|
| 825 | int |
---|
| 826 | sifdown(u) |
---|
| 827 | int u; |
---|
| 828 | { |
---|
| 829 | struct ifreq ifr; |
---|
| 830 | int rv; |
---|
| 831 | struct npioctl npi; |
---|
| 832 | |
---|
| 833 | rv = 1; |
---|
| 834 | npi.protocol = PPP_IP; |
---|
| 835 | npi.mode = NPMODE_ERROR; |
---|
| 836 | ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi); |
---|
| 837 | /* ignore errors, because ppp_fd might have been closed by now. */ |
---|
| 838 | |
---|
[2f1b930] | 839 | strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
---|
[d0950ad] | 840 | if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
[2f1b930] | 841 | error("ioctl (SIOCGIFFLAGS): %m"); |
---|
[d0950ad] | 842 | rv = 0; |
---|
| 843 | } else { |
---|
| 844 | ifr.ifr_flags &= ~IFF_UP; |
---|
| 845 | if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) { |
---|
[2f1b930] | 846 | error("ioctl(SIOCSIFFLAGS): %m"); |
---|
[d0950ad] | 847 | rv = 0; |
---|
| 848 | } else |
---|
| 849 | if_is_up = 0; |
---|
| 850 | } |
---|
| 851 | return rv; |
---|
| 852 | } |
---|
| 853 | |
---|
| 854 | /* |
---|
| 855 | * SET_SA_FAMILY - set the sa_family field of a struct sockaddr, |
---|
| 856 | * if it exists. |
---|
| 857 | */ |
---|
| 858 | #define SET_SA_FAMILY(addr, family) \ |
---|
| 859 | BZERO((char *) &(addr), sizeof(addr)); \ |
---|
| 860 | addr.sa_family = (family); \ |
---|
| 861 | addr.sa_len = sizeof(addr); |
---|
| 862 | |
---|
| 863 | /* |
---|
| 864 | * sifaddr - Config the interface IP addresses and netmask. |
---|
| 865 | */ |
---|
| 866 | int |
---|
| 867 | sifaddr(u, o, h, m) |
---|
| 868 | int u; |
---|
| 869 | u_int32_t o, h, m; |
---|
| 870 | { |
---|
| 871 | struct ifaliasreq ifra; |
---|
| 872 | struct ifreq ifr; |
---|
| 873 | |
---|
[2f1b930] | 874 | strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name)); |
---|
[d0950ad] | 875 | SET_SA_FAMILY(ifra.ifra_addr, AF_INET); |
---|
| 876 | ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o; |
---|
| 877 | SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET); |
---|
| 878 | ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h; |
---|
| 879 | if (m != 0) { |
---|
| 880 | SET_SA_FAMILY(ifra.ifra_mask, AF_INET); |
---|
| 881 | ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m; |
---|
| 882 | } else |
---|
| 883 | BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask)); |
---|
| 884 | BZERO(&ifr, sizeof(ifr)); |
---|
[2f1b930] | 885 | strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); |
---|
[d0950ad] | 886 | if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) { |
---|
[2f1b930] | 887 | if (errno != EADDRNOTAVAIL) |
---|
| 888 | warn("Couldn't remove interface address: %m"); |
---|
[d0950ad] | 889 | } |
---|
| 890 | if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) { |
---|
| 891 | if (errno != EEXIST) { |
---|
[2f1b930] | 892 | error("Couldn't set interface address: %m"); |
---|
[d0950ad] | 893 | return 0; |
---|
| 894 | } |
---|
[2f1b930] | 895 | warn("Couldn't set interface address: Address %I already exists", o); |
---|
| 896 | } |
---|
[d0950ad] | 897 | ifaddrs[0] = o; |
---|
| 898 | ifaddrs[1] = h; |
---|
| 899 | return 1; |
---|
| 900 | } |
---|
| 901 | |
---|
| 902 | /* |
---|
| 903 | * cifaddr - Clear the interface IP addresses, and delete routes |
---|
| 904 | * through the interface if possible. |
---|
| 905 | */ |
---|
| 906 | int |
---|
| 907 | cifaddr(u, o, h) |
---|
| 908 | int u; |
---|
| 909 | u_int32_t o, h; |
---|
| 910 | { |
---|
| 911 | struct ifaliasreq ifra; |
---|
| 912 | |
---|
| 913 | ifaddrs[0] = 0; |
---|
[2f1b930] | 914 | strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name)); |
---|
[d0950ad] | 915 | SET_SA_FAMILY(ifra.ifra_addr, AF_INET); |
---|
| 916 | ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o; |
---|
| 917 | SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET); |
---|
| 918 | ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h; |
---|
| 919 | BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask)); |
---|
| 920 | if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) { |
---|
[2f1b930] | 921 | if (errno != EADDRNOTAVAIL) |
---|
| 922 | warn("Couldn't delete interface address: %m"); |
---|
| 923 | return 0; |
---|
[d0950ad] | 924 | } |
---|
| 925 | return 1; |
---|
| 926 | } |
---|
| 927 | |
---|
| 928 | /* |
---|
| 929 | * sifdefaultroute - assign a default route through the address given. |
---|
| 930 | */ |
---|
| 931 | int |
---|
| 932 | sifdefaultroute(u, l, g) |
---|
| 933 | int u; |
---|
| 934 | u_int32_t l, g; |
---|
| 935 | { |
---|
| 936 | return dodefaultroute(g, 's'); |
---|
| 937 | } |
---|
| 938 | |
---|
| 939 | /* |
---|
| 940 | * cifdefaultroute - delete a default route through the address given. |
---|
| 941 | */ |
---|
| 942 | int |
---|
| 943 | cifdefaultroute(u, l, g) |
---|
| 944 | int u; |
---|
| 945 | u_int32_t l, g; |
---|
| 946 | { |
---|
| 947 | return dodefaultroute(g, 'c'); |
---|
| 948 | } |
---|
| 949 | |
---|
| 950 | /* |
---|
| 951 | * dodefaultroute - talk to a routing socket to add/delete a default route. |
---|
| 952 | */ |
---|
| 953 | static int |
---|
| 954 | dodefaultroute(g, cmd) |
---|
| 955 | u_int32_t g; |
---|
| 956 | int cmd; |
---|
| 957 | { |
---|
[cb1e8a46] | 958 | /* int status; */ |
---|
[2f1b930] | 959 | struct sockaddr_in address; |
---|
| 960 | struct sockaddr_in netmask; |
---|
| 961 | struct sockaddr_in gateway; |
---|
| 962 | |
---|
| 963 | memset((void *) &address, 0, sizeof(address)); |
---|
| 964 | address.sin_len = sizeof address; |
---|
| 965 | address.sin_family = AF_INET; |
---|
| 966 | address.sin_addr.s_addr = INADDR_ANY; |
---|
| 967 | |
---|
| 968 | memset((void *) &netmask, 0, sizeof(netmask)); |
---|
| 969 | netmask.sin_len = sizeof netmask; |
---|
| 970 | netmask.sin_addr.s_addr = INADDR_ANY; |
---|
| 971 | netmask.sin_family = AF_INET; |
---|
| 972 | |
---|
| 973 | if (cmd=='s') { |
---|
| 974 | memset((void *) &gateway, 0, sizeof(gateway)); |
---|
| 975 | gateway.sin_len = sizeof gateway; |
---|
| 976 | gateway.sin_family = AF_INET; |
---|
| 977 | gateway.sin_addr.s_addr = g; |
---|
| 978 | |
---|
| 979 | rtems_bsdnet_rtrequest(RTM_ADD, |
---|
| 980 | (struct sockaddr *)&address, |
---|
| 981 | (struct sockaddr *)&gateway, |
---|
| 982 | (struct sockaddr *)&netmask, |
---|
| 983 | (RTF_UP|RTF_GATEWAY|RTF_STATIC), NULL); |
---|
[d0950ad] | 984 | } |
---|
[2f1b930] | 985 | else { |
---|
| 986 | memset((void *) &gateway, 0, sizeof(gateway)); |
---|
| 987 | gateway.sin_len = sizeof gateway; |
---|
| 988 | gateway.sin_family = AF_INET; |
---|
| 989 | gateway.sin_addr.s_addr = INADDR_ANY; |
---|
| 990 | |
---|
| 991 | rtems_bsdnet_rtrequest(RTM_DELETE, |
---|
| 992 | (struct sockaddr *)&address, |
---|
| 993 | (struct sockaddr *)&gateway, |
---|
| 994 | (struct sockaddr *)&netmask, |
---|
| 995 | (RTF_UP|RTF_STATIC), NULL); |
---|
[d0950ad] | 996 | } |
---|
| 997 | |
---|
[2f1b930] | 998 | default_route_gateway = (cmd == 's')? g: 0; |
---|
| 999 | |
---|
[d0950ad] | 1000 | return 1; |
---|
| 1001 | } |
---|
| 1002 | |
---|
| 1003 | #if RTM_VERSION >= 3 |
---|
| 1004 | |
---|
| 1005 | /* |
---|
| 1006 | * sifproxyarp - Make a proxy ARP entry for the peer. |
---|
| 1007 | */ |
---|
| 1008 | static struct { |
---|
| 1009 | struct rt_msghdr hdr; |
---|
| 1010 | struct sockaddr_inarp dst; |
---|
| 1011 | struct sockaddr_dl hwa; |
---|
| 1012 | char extra[128]; |
---|
| 1013 | } arpmsg; |
---|
| 1014 | |
---|
| 1015 | static int arpmsg_valid; |
---|
| 1016 | |
---|
| 1017 | int |
---|
| 1018 | sifproxyarp(unit, hisaddr) |
---|
| 1019 | int unit; |
---|
| 1020 | u_int32_t hisaddr; |
---|
| 1021 | { |
---|
| 1022 | int routes; |
---|
| 1023 | |
---|
| 1024 | /* |
---|
| 1025 | * Get the hardware address of an interface on the same subnet |
---|
| 1026 | * as our local address. |
---|
| 1027 | */ |
---|
| 1028 | memset(&arpmsg, 0, sizeof(arpmsg)); |
---|
| 1029 | if (!get_ether_addr(hisaddr, &arpmsg.hwa)) { |
---|
[2f1b930] | 1030 | error("Cannot determine ethernet address for proxy ARP"); |
---|
| 1031 | return 0; |
---|
[d0950ad] | 1032 | } |
---|
| 1033 | |
---|
| 1034 | if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { |
---|
[2f1b930] | 1035 | error("Couldn't add proxy arp entry: socket: %m"); |
---|
| 1036 | return 0; |
---|
[d0950ad] | 1037 | } |
---|
| 1038 | |
---|
| 1039 | arpmsg.hdr.rtm_type = RTM_ADD; |
---|
| 1040 | arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC; |
---|
| 1041 | arpmsg.hdr.rtm_version = RTM_VERSION; |
---|
| 1042 | arpmsg.hdr.rtm_seq = ++rtm_seq; |
---|
| 1043 | arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY; |
---|
| 1044 | arpmsg.hdr.rtm_inits = RTV_EXPIRE; |
---|
| 1045 | arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp); |
---|
| 1046 | arpmsg.dst.sin_family = AF_INET; |
---|
| 1047 | arpmsg.dst.sin_addr.s_addr = hisaddr; |
---|
| 1048 | arpmsg.dst.sin_other = SIN_PROXY; |
---|
| 1049 | |
---|
| 1050 | arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg |
---|
| 1051 | + arpmsg.hwa.sdl_len; |
---|
| 1052 | if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) { |
---|
[2f1b930] | 1053 | error("Couldn't add proxy arp entry: %m"); |
---|
| 1054 | close(routes); |
---|
[d0950ad] | 1055 | return 0; |
---|
| 1056 | } |
---|
| 1057 | |
---|
| 1058 | close(routes); |
---|
| 1059 | arpmsg_valid = 1; |
---|
| 1060 | proxy_arp_addr = hisaddr; |
---|
| 1061 | return 1; |
---|
| 1062 | } |
---|
| 1063 | |
---|
| 1064 | /* |
---|
| 1065 | * cifproxyarp - Delete the proxy ARP entry for the peer. |
---|
| 1066 | */ |
---|
| 1067 | int |
---|
| 1068 | cifproxyarp(unit, hisaddr) |
---|
| 1069 | int unit; |
---|
| 1070 | u_int32_t hisaddr; |
---|
| 1071 | { |
---|
| 1072 | int routes; |
---|
| 1073 | |
---|
| 1074 | if (!arpmsg_valid) |
---|
| 1075 | return 0; |
---|
| 1076 | arpmsg_valid = 0; |
---|
| 1077 | |
---|
| 1078 | arpmsg.hdr.rtm_type = RTM_DELETE; |
---|
| 1079 | arpmsg.hdr.rtm_seq = ++rtm_seq; |
---|
| 1080 | |
---|
| 1081 | if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) { |
---|
[2f1b930] | 1082 | error("Couldn't delete proxy arp entry: socket: %m"); |
---|
[d0950ad] | 1083 | return 0; |
---|
| 1084 | } |
---|
| 1085 | |
---|
| 1086 | if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) { |
---|
[2f1b930] | 1087 | error("Couldn't delete proxy arp entry: %m"); |
---|
[d0950ad] | 1088 | close(routes); |
---|
| 1089 | return 0; |
---|
| 1090 | } |
---|
| 1091 | |
---|
| 1092 | close(routes); |
---|
| 1093 | proxy_arp_addr = 0; |
---|
| 1094 | return 1; |
---|
| 1095 | } |
---|
| 1096 | |
---|
| 1097 | #else /* RTM_VERSION */ |
---|
| 1098 | |
---|
| 1099 | /* |
---|
| 1100 | * sifproxyarp - Make a proxy ARP entry for the peer. |
---|
| 1101 | */ |
---|
| 1102 | int |
---|
| 1103 | sifproxyarp(unit, hisaddr) |
---|
| 1104 | int unit; |
---|
| 1105 | u_int32_t hisaddr; |
---|
| 1106 | { |
---|
| 1107 | struct arpreq arpreq; |
---|
| 1108 | struct { |
---|
| 1109 | struct sockaddr_dl sdl; |
---|
| 1110 | char space[128]; |
---|
| 1111 | } dls; |
---|
| 1112 | |
---|
| 1113 | BZERO(&arpreq, sizeof(arpreq)); |
---|
| 1114 | |
---|
| 1115 | /* |
---|
| 1116 | * Get the hardware address of an interface on the same subnet |
---|
| 1117 | * as our local address. |
---|
| 1118 | */ |
---|
| 1119 | if (!get_ether_addr(hisaddr, &dls.sdl)) { |
---|
[2f1b930] | 1120 | error("Cannot determine ethernet address for proxy ARP"); |
---|
[d0950ad] | 1121 | return 0; |
---|
| 1122 | } |
---|
| 1123 | |
---|
| 1124 | arpreq.arp_ha.sa_len = sizeof(struct sockaddr); |
---|
| 1125 | arpreq.arp_ha.sa_family = AF_UNSPEC; |
---|
| 1126 | BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen); |
---|
| 1127 | SET_SA_FAMILY(arpreq.arp_pa, AF_INET); |
---|
| 1128 | ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr; |
---|
| 1129 | arpreq.arp_flags = ATF_PERM | ATF_PUBL; |
---|
| 1130 | if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) { |
---|
[2f1b930] | 1131 | error("Couldn't add proxy arp entry: %m"); |
---|
[d0950ad] | 1132 | return 0; |
---|
| 1133 | } |
---|
| 1134 | |
---|
| 1135 | proxy_arp_addr = hisaddr; |
---|
| 1136 | return 1; |
---|
| 1137 | } |
---|
| 1138 | |
---|
| 1139 | /* |
---|
| 1140 | * cifproxyarp - Delete the proxy ARP entry for the peer. |
---|
| 1141 | */ |
---|
| 1142 | int |
---|
| 1143 | cifproxyarp(unit, hisaddr) |
---|
| 1144 | int unit; |
---|
| 1145 | u_int32_t hisaddr; |
---|
| 1146 | { |
---|
| 1147 | struct arpreq arpreq; |
---|
| 1148 | |
---|
| 1149 | BZERO(&arpreq, sizeof(arpreq)); |
---|
| 1150 | SET_SA_FAMILY(arpreq.arp_pa, AF_INET); |
---|
| 1151 | ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr; |
---|
| 1152 | if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) { |
---|
[2f1b930] | 1153 | warn("Couldn't delete proxy arp entry: %m"); |
---|
[d0950ad] | 1154 | return 0; |
---|
| 1155 | } |
---|
| 1156 | proxy_arp_addr = 0; |
---|
| 1157 | return 1; |
---|
| 1158 | } |
---|
| 1159 | #endif /* RTM_VERSION */ |
---|
| 1160 | |
---|
| 1161 | |
---|
| 1162 | /* |
---|
| 1163 | * get_ether_addr - get the hardware address of an interface on the |
---|
| 1164 | * the same subnet as ipaddr. |
---|
| 1165 | */ |
---|
| 1166 | #define MAX_IFS 32 |
---|
| 1167 | |
---|
| 1168 | static int |
---|
| 1169 | get_ether_addr(ipaddr, hwaddr) |
---|
| 1170 | u_int32_t ipaddr; |
---|
| 1171 | struct sockaddr_dl *hwaddr; |
---|
| 1172 | { |
---|
| 1173 | struct ifreq *ifr, *ifend, *ifp; |
---|
| 1174 | u_int32_t ina, mask; |
---|
| 1175 | struct sockaddr_dl *dla; |
---|
| 1176 | struct ifreq ifreq; |
---|
| 1177 | struct ifconf ifc; |
---|
| 1178 | struct ifreq ifs[MAX_IFS]; |
---|
| 1179 | |
---|
| 1180 | ifc.ifc_len = sizeof(ifs); |
---|
| 1181 | ifc.ifc_req = ifs; |
---|
| 1182 | if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { |
---|
[2f1b930] | 1183 | error("ioctl(SIOCGIFCONF): %m"); |
---|
[d0950ad] | 1184 | return 0; |
---|
| 1185 | } |
---|
| 1186 | |
---|
| 1187 | /* |
---|
| 1188 | * Scan through looking for an interface with an Internet |
---|
| 1189 | * address on the same subnet as `ipaddr'. |
---|
| 1190 | */ |
---|
| 1191 | ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); |
---|
| 1192 | for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *) |
---|
| 1193 | ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) { |
---|
| 1194 | if (ifr->ifr_addr.sa_family == AF_INET) { |
---|
| 1195 | ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; |
---|
[2f1b930] | 1196 | strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); |
---|
[d0950ad] | 1197 | /* |
---|
| 1198 | * Check that the interface is up, and not point-to-point |
---|
| 1199 | * or loopback. |
---|
| 1200 | */ |
---|
| 1201 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) |
---|
| 1202 | continue; |
---|
| 1203 | if ((ifreq.ifr_flags & |
---|
| 1204 | (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP)) |
---|
| 1205 | != (IFF_UP|IFF_BROADCAST)) |
---|
| 1206 | continue; |
---|
| 1207 | /* |
---|
| 1208 | * Get its netmask and check that it's on the right subnet. |
---|
| 1209 | */ |
---|
| 1210 | if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) |
---|
| 1211 | continue; |
---|
| 1212 | mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr; |
---|
| 1213 | if ((ipaddr & mask) != (ina & mask)) |
---|
| 1214 | continue; |
---|
| 1215 | |
---|
| 1216 | break; |
---|
| 1217 | } |
---|
| 1218 | } |
---|
| 1219 | |
---|
| 1220 | if (ifr >= ifend) |
---|
| 1221 | return 0; |
---|
[2f1b930] | 1222 | info("found interface %s for proxy arp", ifr->ifr_name); |
---|
[d0950ad] | 1223 | |
---|
| 1224 | /* |
---|
| 1225 | * Now scan through again looking for a link-level address |
---|
| 1226 | * for this interface. |
---|
| 1227 | */ |
---|
| 1228 | ifp = ifr; |
---|
| 1229 | for (ifr = ifc.ifc_req; ifr < ifend; ) { |
---|
| 1230 | if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0 |
---|
| 1231 | && ifr->ifr_addr.sa_family == AF_LINK) { |
---|
| 1232 | /* |
---|
| 1233 | * Found the link-level address - copy it out |
---|
| 1234 | */ |
---|
| 1235 | dla = (struct sockaddr_dl *) &ifr->ifr_addr; |
---|
| 1236 | BCOPY(dla, hwaddr, dla->sdl_len); |
---|
| 1237 | return 1; |
---|
| 1238 | } |
---|
| 1239 | ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len); |
---|
| 1240 | } |
---|
| 1241 | |
---|
| 1242 | return 0; |
---|
| 1243 | } |
---|
| 1244 | |
---|
| 1245 | /* |
---|
| 1246 | * Return user specified netmask, modified by any mask we might determine |
---|
| 1247 | * for address `addr' (in network byte order). |
---|
| 1248 | * Here we scan through the system's list of interfaces, looking for |
---|
| 1249 | * any non-point-to-point interfaces which might appear to be on the same |
---|
| 1250 | * network as `addr'. If we find any, we OR in their netmask to the |
---|
| 1251 | * user-specified netmask. |
---|
| 1252 | */ |
---|
| 1253 | u_int32_t |
---|
| 1254 | GetMask(addr) |
---|
| 1255 | u_int32_t addr; |
---|
| 1256 | { |
---|
| 1257 | u_int32_t mask, nmask, ina; |
---|
| 1258 | struct ifreq *ifr, *ifend, ifreq; |
---|
| 1259 | struct ifconf ifc; |
---|
| 1260 | struct ifreq ifs[MAX_IFS]; |
---|
| 1261 | |
---|
| 1262 | addr = ntohl(addr); |
---|
| 1263 | if (IN_CLASSA(addr)) /* determine network mask for address class */ |
---|
| 1264 | nmask = IN_CLASSA_NET; |
---|
| 1265 | else if (IN_CLASSB(addr)) |
---|
| 1266 | nmask = IN_CLASSB_NET; |
---|
| 1267 | else |
---|
| 1268 | nmask = IN_CLASSC_NET; |
---|
| 1269 | /* class D nets are disallowed by bad_ip_adrs */ |
---|
| 1270 | mask = netmask | htonl(nmask); |
---|
| 1271 | |
---|
| 1272 | /* |
---|
| 1273 | * Scan through the system's network interfaces. |
---|
| 1274 | */ |
---|
| 1275 | ifc.ifc_len = sizeof(ifs); |
---|
| 1276 | ifc.ifc_req = ifs; |
---|
| 1277 | if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) { |
---|
[2f1b930] | 1278 | warn("ioctl(SIOCGIFCONF): %m"); |
---|
[d0950ad] | 1279 | return mask; |
---|
| 1280 | } |
---|
| 1281 | ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len); |
---|
| 1282 | for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *) |
---|
| 1283 | ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) { |
---|
| 1284 | /* |
---|
| 1285 | * Check the interface's internet address. |
---|
| 1286 | */ |
---|
| 1287 | if (ifr->ifr_addr.sa_family != AF_INET) |
---|
| 1288 | continue; |
---|
| 1289 | ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr; |
---|
| 1290 | if ((ntohl(ina) & nmask) != (addr & nmask)) |
---|
| 1291 | continue; |
---|
| 1292 | /* |
---|
| 1293 | * Check that the interface is up, and not point-to-point or loopback. |
---|
| 1294 | */ |
---|
[2f1b930] | 1295 | strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name)); |
---|
[d0950ad] | 1296 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0) |
---|
| 1297 | continue; |
---|
| 1298 | if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK)) |
---|
| 1299 | != IFF_UP) |
---|
| 1300 | continue; |
---|
| 1301 | /* |
---|
| 1302 | * Get its netmask and OR it into our mask. |
---|
| 1303 | */ |
---|
| 1304 | if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0) |
---|
| 1305 | continue; |
---|
| 1306 | mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr; |
---|
| 1307 | } |
---|
| 1308 | |
---|
| 1309 | return mask; |
---|
| 1310 | } |
---|
| 1311 | |
---|
| 1312 | /* |
---|
[2f1b930] | 1313 | * have_route_to - determine if the system has any route to |
---|
| 1314 | * a given IP address. |
---|
| 1315 | * For demand mode to work properly, we have to ignore routes |
---|
| 1316 | * through our own interface. |
---|
[d0950ad] | 1317 | */ |
---|
[2f1b930] | 1318 | int have_route_to(u_int32_t addr) |
---|
[d0950ad] | 1319 | { |
---|
[2f1b930] | 1320 | return -1; |
---|
[d0950ad] | 1321 | } |
---|
| 1322 | |
---|
| 1323 | /* |
---|
[2f1b930] | 1324 | * Use the hostid as part of the random number seed. |
---|
[d0950ad] | 1325 | */ |
---|
| 1326 | int |
---|
[2f1b930] | 1327 | get_host_seed() |
---|
[d0950ad] | 1328 | { |
---|
[2f1b930] | 1329 | return 17; |
---|
[d0950ad] | 1330 | } |
---|