1 /* SPDX-License-Identifier: BSD-2-Clause */
3 * dhcpcd - DHCP client daemon
4 * Copyright (c) 2006-2021 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 /* If the interface does not support carrier status (ie PPP),
42 * dhcpcd can poll it for the relevant flags periodically */
43 #define IF_POLL_UP 100 /* milliseconds */
46 * Systems which handle 1 address per alias.
47 * Currenly this is just Solaris.
48 * While Linux can do aliased addresses, it is only useful for their
49 * legacy ifconfig(8) tool which cannot display >1 IPv4 address
50 * (it can display many IPv6 addresses which makes the limitation odd).
51 * Linux has ip(8) which is a more feature rich tool, without the above
62 /* POSIX defines ioctl request as an int, which Solaris and musl use.
63 * Everyone else use an unsigned long, which happens to be the bigger one
64 * so we use that in our on wire API. */
65 #ifdef IOCTL_REQUEST_TYPE
66 typedef IOCTL_REQUEST_TYPE ioctl_request_t;
68 typedef unsigned long ioctl_request_t;
76 #define EUI64_ADDR_LEN 8
77 #define INFINIBAND_ADDR_LEN 20
79 /* Linux 2.4 doesn't define this */
80 #ifndef ARPHRD_IEEE1394
81 # define ARPHRD_IEEE1394 24
84 /* The BSD's don't define this yet */
85 #ifndef ARPHRD_INFINIBAND
86 # define ARPHRD_INFINIBAND 32
89 /* Maximum frame length.
90 * Support jumbo frames and some extra. */
91 #define FRAMEHDRLEN_MAX 14 /* only ethernet support */
92 #define FRAMELEN_MAX (FRAMEHDRLEN_MAX + 9216)
94 #define UDPLEN_MAX 64 * 1024
96 /* Work out if we have a private address or not
102 # define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \
103 ((addr & 0xfff00000) == 0xac100000) || \
104 ((addr & IN_CLASSB_NET) == 0xc0a80000))
109 # define CLLADDR(sdl) (const void *)((sdl)->sdl_data + (sdl)->sdl_nlen)
114 /* Solaris stupidly defines this for compat with BSD
115 * but then ignores it. */
118 /* This interface is busted on DilOS at least.
119 * It used to work, but lukily Solaris can fall back to
123 /* Solaris getifaddrs is very un-suitable for dhcpcd.
124 * See if-sun.c for details why. */
126 int if_getifaddrs(struct ifaddrs **);
127 #define getifaddrs if_getifaddrs
128 int if_getsubnet(struct dhcpcd_ctx *, const char *, int, void *, size_t);
131 int if_ioctl(struct dhcpcd_ctx *, ioctl_request_t, void *, size_t);
133 #define pioctl(ctx, req, data, len) if_ioctl((ctx), (req), (data), (len))
135 #define pioctl(ctx, req, data, len) ioctl((ctx)->pf_inet_fd, (req),(data),(len))
137 int if_getflags(struct interface *);
138 int if_setflag(struct interface *, short, short);
139 #define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING), 0)
140 #define if_down(ifp) if_setflag((ifp), 0, IFF_UP);
141 bool if_is_link_up(const struct interface *);
142 bool if_valid_hwaddr(const uint8_t *, size_t);
143 struct if_head *if_discover(struct dhcpcd_ctx *, struct ifaddrs **,
144 int, char * const *);
145 void if_markaddrsstale(struct if_head *);
146 void if_learnaddrs(struct dhcpcd_ctx *, struct if_head *, struct ifaddrs **);
147 void if_deletestaleaddrs(struct if_head *);
148 struct interface *if_find(struct if_head *, const char *);
149 struct interface *if_findindex(struct if_head *, unsigned int);
150 struct interface *if_loopback(struct dhcpcd_ctx *);
151 void if_free(struct interface *);
152 int if_domtu(const struct interface *, short int);
153 #define if_getmtu(ifp) if_domtu((ifp), 0)
154 #define if_setmtu(ifp, mtu) if_domtu((ifp), (mtu))
155 int if_carrier(struct interface *, const void *);
156 bool if_roaming(struct interface *);
159 int if_makealias(char *, size_t, const char *, int);
162 int if_mtu_os(const struct interface *);
165 * Helper to decode an interface name of bge0:1 to
166 * devname = bge0, drvname = bge0, ppa = 0, lun = 1.
167 * If ppa or lun are invalid they are set to -1.
170 char ifname[IF_NAMESIZE];
171 char devname[IF_NAMESIZE];
172 char drvname[IF_NAMESIZE];
177 int if_nametospec(const char *, struct if_spec *);
179 /* The below functions are provided by if-KERNEL.c */
181 int if_conf(struct interface *);
182 int if_init(struct interface *);
183 int if_getssid(struct interface *);
184 int if_ignoregroup(int, const char *);
185 bool if_ignore(struct dhcpcd_ctx *, const char *);
186 int if_vimaster(struct dhcpcd_ctx *ctx, const char *);
187 unsigned short if_vlanid(const struct interface *);
188 char * if_getnetworknamespace(char *, size_t);
189 int if_opensockets(struct dhcpcd_ctx *);
190 int if_opensockets_os(struct dhcpcd_ctx *);
191 void if_closesockets(struct dhcpcd_ctx *);
192 void if_closesockets_os(struct dhcpcd_ctx *);
193 int if_handlelink(struct dhcpcd_ctx *);
194 int if_randomisemac(struct interface *);
195 int if_setmac(struct interface *ifp, void *, uint8_t);
197 /* dhcpcd uses the same routing flags as BSD.
198 * If the platform doesn't use these flags,
199 * map them in the platform interace file. */
201 #define RTM_ADD 0x1 /* Add Route */
202 #define RTM_DELETE 0x2 /* Delete Route */
203 #define RTM_CHANGE 0x3 /* Change Metrics or flags */
204 #define RTM_GET 0x4 /* Report Metrics */
207 /* Define SOCK_CLOEXEC and SOCK_NONBLOCK for systems that lack it.
208 * xsocket() in if.c will map them to fctnl FD_CLOEXEC and O_NONBLOCK. */
210 # define HAVE_SOCK_CLOEXEC
212 # define SOCK_CLOEXEC 0x10000000
215 # define HAVE_SOCK_NONBLOCK
217 # define SOCK_NONBLOCK 0x20000000
220 #define SOCK_CXNB SOCK_CLOEXEC | SOCK_NONBLOCK
222 int xsocket(int, int, int);
223 int xsocketpair(int, int, int, int[2]);
225 int if_route(unsigned char, const struct rt *rt);
226 int if_initrt(struct dhcpcd_ctx *, rb_tree_t *, int);
228 int if_missfilter(struct interface *, struct sockaddr *);
229 int if_missfilter_apply(struct dhcpcd_ctx *);
232 int if_address(unsigned char, const struct ipv4_addr *);
233 int if_addrflags(const struct interface *, const struct in_addr *,
239 void if_disable_rtadv(void);
240 void if_setup_inet6(const struct interface *);
241 int ip6_forwarding(const char *ifname);
246 int if_applyra(const struct ra *);
247 int if_address6(unsigned char, const struct ipv6_addr *);
248 int if_addrflags6(const struct interface *, const struct in6_addr *,
250 int if_getlifetime6(struct ipv6_addr *);
253 #define if_checkipv6(a, b, c) (-1)
256 int if_machinearch(char *, size_t);
257 struct interface *if_findifpfromcmsg(struct dhcpcd_ctx *,
258 struct msghdr *, int *);
261 int if_linksocket(struct sockaddr_nl *, int, int);
262 int if_getnetlink(struct dhcpcd_ctx *, struct iovec *, int, int,
263 int (*)(struct dhcpcd_ctx *, void *, struct nlmsghdr *), void *);