1 /* SPDX-License-Identifier: BSD-2-Clause */
3 * dhcpcd - DHCP client daemon
4 * Copyright (c) 2006-2019 Roy Marples <roy@marples.name>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <net/route.h> /* for RTM_ADD et all */
34 #include <netinet/in.h>
36 #include <netinet/in_var.h> /* for IN_IFF_TENTATIVE et all */
41 /* Some systems have in-built IPv4 DAD.
42 * However, we need them to do DAD at carrier up as well. */
43 #ifdef IN_IFF_TENTATIVE
45 # define NOCARRIER_PRESERVE_IP
50 * Systems which handle 1 address per alias.
51 * Currenly this is just Solaris.
52 * While Linux can do aliased addresses, it is only useful for their
53 * legacy ifconfig(8) tool which cannot display >1 IPv4 address
54 * (it can display many IPv6 addresses which makes the limitation odd).
55 * Linux has ip(8) which is a more feature rich tool, without the above
70 #define EUI64_ADDR_LEN 8
71 #define INFINIBAND_ADDR_LEN 20
73 /* Linux 2.4 doesn't define this */
74 #ifndef ARPHRD_IEEE1394
75 # define ARPHRD_IEEE1394 24
78 /* The BSD's don't define this yet */
79 #ifndef ARPHRD_INFINIBAND
80 # define ARPHRD_INFINIBAND 32
83 /* Work out if we have a private address or not
89 # define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \
90 ((addr & 0xfff00000) == 0xac100000) || \
91 ((addr & IN_CLASSB_NET) == 0xc0a80000))
96 # define CLLADDR(sdl) (const void *)((sdl)->sdl_data + (sdl)->sdl_nlen)
101 /* Solaris stupidly defines this for compat with BSD
102 * but then ignores it. */
105 /* Solaris getifaddrs is very un-suitable for dhcpcd.
106 * See if-sun.c for details why. */
108 int if_getifaddrs(struct ifaddrs **);
109 #define getifaddrs if_getifaddrs
110 int if_getsubnet(struct dhcpcd_ctx *, const char *, int, void *, size_t);
113 int if_getflags(struct interface *ifp);
114 int if_setflag(struct interface *ifp, short flag);
115 #define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING))
116 bool if_valid_hwaddr(const uint8_t *, size_t);
117 struct if_head *if_discover(struct dhcpcd_ctx *, struct ifaddrs **,
118 int, char * const *);
119 void if_markaddrsstale(struct if_head *);
120 void if_learnaddrs(struct dhcpcd_ctx *, struct if_head *, struct ifaddrs **);
121 void if_deletestaleaddrs(struct if_head *);
122 struct interface *if_find(struct if_head *, const char *);
123 struct interface *if_findindex(struct if_head *, unsigned int);
124 struct interface *if_loopback(struct dhcpcd_ctx *);
125 void if_free(struct interface *);
126 int if_domtu(const struct interface *, short int);
127 #define if_getmtu(ifp) if_domtu((ifp), 0)
128 #define if_setmtu(ifp, mtu) if_domtu((ifp), (mtu))
129 int if_carrier(struct interface *);
132 int if_makealias(char *, size_t, const char *, int);
135 int if_mtu_os(const struct interface *);
138 * Helper to decode an interface name of bge0:1 to
139 * devname = bge0, drvname = bge0, ppa = 0, lun = 1.
140 * If ppa or lun are invalid they are set to -1.
143 char ifname[IF_NAMESIZE];
144 char devname[IF_NAMESIZE];
145 char drvname[IF_NAMESIZE];
149 int if_nametospec(const char *, struct if_spec *);
151 /* The below functions are provided by if-KERNEL.c */
152 int if_conf(struct interface *);
153 int if_init(struct interface *);
154 int if_getssid(struct interface *);
155 int if_vimaster(const struct dhcpcd_ctx *ctx, const char *);
156 unsigned short if_vlanid(const struct interface *);
157 int if_opensockets(struct dhcpcd_ctx *);
158 int if_opensockets_os(struct dhcpcd_ctx *);
159 void if_closesockets(struct dhcpcd_ctx *);
160 void if_closesockets_os(struct dhcpcd_ctx *);
161 int if_handlelink(struct dhcpcd_ctx *);
163 /* dhcpcd uses the same routing flags as BSD.
164 * If the platform doesn't use these flags,
165 * map them in the platform interace file. */
167 #define RTM_ADD 0x1 /* Add Route */
168 #define RTM_DELETE 0x2 /* Delete Route */
169 #define RTM_CHANGE 0x3 /* Change Metrics or flags */
170 #define RTM_GET 0x4 /* Report Metrics */
173 /* Define SOCK_CLOEXEC and SOCK_NONBLOCK for systems that lack it.
174 * xsocket() in if.c will map them to fctnl FD_CLOEXEC and O_NONBLOCK. */
176 # define HAVE_SOCK_CLOEXEC
178 # define SOCK_CLOEXEC 0x10000000
181 # define HAVE_SOCK_NONBLOCK
183 # define SOCK_NONBLOCK 0x20000000
186 int if_route(unsigned char, const struct rt *rt);
187 int if_initrt(struct dhcpcd_ctx *, rb_tree_t *, int);
190 int if_address(unsigned char, const struct ipv4_addr *);
191 int if_addrflags(const struct interface *, const struct in_addr *,
197 void if_setup_inet6(const struct interface *);
198 #ifdef IPV6_MANAGETEMPADDR
199 int ip6_use_tempaddr(const char *ifname);
200 int ip6_temp_preferred_lifetime(const char *ifname);
201 int ip6_temp_valid_lifetime(const char *ifname);
203 #define ip6_use_tempaddr(a) (0)
205 int ip6_forwarding(const char *ifname);
207 int if_address6(unsigned char, const struct ipv6_addr *);
208 int if_addrflags6(const struct interface *, const struct in6_addr *,
210 int if_getlifetime6(struct ipv6_addr *);
213 #define if_checkipv6(a, b, c) (-1)
216 int if_machinearch(char *, size_t);
217 struct interface *if_findifpfromcmsg(struct dhcpcd_ctx *,
218 struct msghdr *, int *);
219 int xsocket(int, int, int);