external/bsd/dhcpcd/dist/if.h

   1 /* $NetBSD: if.h,v 1.12 2015/08/21 10:39:00 roy Exp $ */
   2
   3 /*
   4  * dhcpcd - DHCP client daemon
   5  * Copyright (c) 2006-2015 Roy Marples <roy@marples.name>
   6  * All rights reserved
   7
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef INTERFACE_H
  31 #define INTERFACE_H
  32
  33 #include <net/if.h>
  34 #ifdef __FreeBSD__
  35 #include <net/if_var.h>
  36 #endif
  37 #include <net/route.h>          /* for RTM_ADD et all */
  38 #include <netinet/in.h>
  39 #ifdef BSD
  40 #include <netinet/in_var.h>     /* for IN_IFF_TENTATIVE et all */
  41 #endif
  42
  43 #if defined(__minix)
  44 /*
  45  * These flags are used for IPv4 autoconfiguration (RFC 3927).  The MINIX 3
  46  * TCP/IP service does not support IPv4 autoconfiguration, because lwIP's
  47  * AUTOIP implementation is all-or-nothing by nature: either it implements the
  48  * whole thing fully itself, or no support is present at all.  dhcpcd(8) needs
  49  * a more hybrid implementation if at all.  It appears that by undefining the
  50  * following flags, dhcpcd(8) will assume that no support is present for them
  51  * in the operating system, and do everything itself instead, which is exactly
  52  * what we want.
  53  */
  54 #undef IN_IFF_TENTATIVE
  55 #undef IN_IFF_DUPLICATED
  56 #undef IN_IFF_DETACHED
  57 #undef IN_IFF_TRYTENTATIVE
  58 #undef IN_IFF_NOTREADY
  59 #endif /* defined(__minix) */
  60
  61 /* Some systems have route metrics.
  62  * OpenBSD route priority is not this. */
  63 #ifndef HAVE_ROUTE_METRIC
  64 # if defined(__linux__)
  65 #  define HAVE_ROUTE_METRIC 1
  66 # endif
  67 #endif
  68
  69 /* Some systems have in-built IPv4 DAD.
  70  * However, we need them to do DAD at carrier up as well. */
  71 #ifdef IN_IFF_TENTATIVE
  72 #  ifdef __NetBSD__
  73 #    define NOCARRIER_PRESERVE_IP
  74 #  endif
  75 #endif
  76
  77 #include "config.h"
  78 #include "dhcpcd.h"
  79 #include "ipv4.h"
  80 #include "ipv6.h"
  81
  82 #define EUI64_ADDR_LEN                  8
  83 #define INFINIBAND_ADDR_LEN             20
  84
  85 /* Linux 2.4 doesn't define this */
  86 #ifndef ARPHRD_IEEE1394
  87 #  define ARPHRD_IEEE1394               24
  88 #endif
  89
  90 /* The BSD's don't define this yet */
  91 #ifndef ARPHRD_INFINIBAND
  92 #  define ARPHRD_INFINIBAND             32
  93 #endif
  94
  95 /* Work out if we have a private address or not
  96  * 10/8
  97  * 172.16/12
  98  * 192.168/16
  99  */
 100 #ifndef IN_PRIVATE
 101 # define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) ||          \
 102             ((addr & 0xfff00000)    == 0xac100000) ||                         \
 103             ((addr & IN_CLASSB_NET) == 0xc0a80000))
 104 #endif
 105
 106 #define RAW_EOF                 1 << 0
 107 #define RAW_PARTIALCSUM         2 << 0
 108
 109 int if_setflag(struct interface *ifp, short flag);
 110 #define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING))
 111 struct if_head *if_discover(struct dhcpcd_ctx *, int, char * const *);
 112 struct interface *if_find(struct if_head *, const char *);
 113 struct interface *if_findindex(struct if_head *, unsigned int);
 114 void if_sortinterfaces(struct dhcpcd_ctx *);
 115 void if_free(struct interface *);
 116 int if_domtu(const struct interface *, short int);
 117 #define if_getmtu(ifp) if_domtu((ifp), 0)
 118 #define if_setmtu(ifp, mtu) if_domtu((ifp), (mtu))
 119 int if_carrier(struct interface *);
 120
 121 /* The below functions are provided by if-KERNEL.c */
 122 int if_conf(struct interface *);
 123 int if_init(struct interface *);
 124 int if_getssid(struct interface *);
 125 int if_vimaster(const struct dhcpcd_ctx *ctx, const char *);
 126 int if_opensockets(struct dhcpcd_ctx *);
 127 int if_openlinksocket(void);
 128 int if_managelink(struct dhcpcd_ctx *);
 129
 130 /* dhcpcd uses the same routing flags as BSD.
 131  * If the platform doesn't use these flags,
 132  * map them in the platform interace file. */
 133 #ifndef RTM_ADD
 134 #define RTM_ADD         0x1     /* Add Route */
 135 #define RTM_DELETE      0x2     /* Delete Route */
 136 #define RTM_CHANGE      0x3     /* Change Metrics or flags */
 137 #define RTM_GET         0x4     /* Report Metrics */
 138 #endif
 139
 140 #ifdef INET
 141 extern const char *if_pfname;
 142 int if_openrawsocket(struct interface *, uint16_t);
 143 ssize_t if_sendrawpacket(const struct interface *,
 144     uint16_t, const void *, size_t);
 145 ssize_t if_readrawpacket(struct interface *, uint16_t, void *, size_t, int *);
 146
 147 int if_address(const struct interface *,
 148     const struct in_addr *, const struct in_addr *,
 149     const struct in_addr *, int);
 150 #define if_addaddress(ifp, addr, net, brd)      \
 151         if_address(ifp, addr, net, brd, 1)
 152 #define if_deladdress(ifp, addr, net)           \
 153         if_address(ifp, addr, net, NULL, -1)
 154
 155 int if_addrflags(const struct in_addr *, const struct interface *);
 156
 157 int if_route(unsigned char, const struct rt *rt);
 158 int if_initrt(struct interface *);
 159 #endif
 160
 161 #ifdef INET6
 162 int if_checkipv6(struct dhcpcd_ctx *ctx, const struct interface *, int);
 163 #ifdef IPV6_MANAGETEMPADDR
 164 int ip6_use_tempaddr(const char *ifname);
 165 int ip6_temp_preferred_lifetime(const char *ifname);
 166 int ip6_temp_valid_lifetime(const char *ifname);
 167 #else
 168 #define ip6_use_tempaddr(a) (0)
 169 #endif
 170
 171 int if_address6(const struct ipv6_addr *, int);
 172 #define if_addaddress6(a) if_address6(a, 1)
 173 #define if_deladdress6(a) if_address6(a, -1)
 174
 175 int if_addrflags6(const struct in6_addr *, const struct interface *);
 176 int if_getlifetime6(struct ipv6_addr *);
 177
 178 int if_route6(unsigned char, const struct rt6 *rt);
 179 int if_initrt6(struct interface *);
 180 #else
 181 #define if_checkipv6(a, b, c) (-1)
 182 #endif
 183
 184 int if_machinearch(char *, size_t);
 185 int xsocket(int, int, int, int);
 186 #endif