mirror of
https://github.com/rsmarples/dhcpcd.git
synced 2024-11-30 13:34:57 +08:00
baa179d338
If a normal defaulr route is deleted, and no other exists, add our IPv4LL default route. Fixes [bd6daf1d59].
147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
/*
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* dhcpcd - DHCP client daemon
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* Copyright (c) 2006-2016 Roy Marples <roy@marples.name>
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* All rights reserved
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef IPV4_H
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#define IPV4_H
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#include "dhcpcd.h"
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#ifdef IN_IFF_TENTATIVE
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#define IN_IFF_NOTUSEABLE \
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(IN_IFF_TENTATIVE | IN_IFF_DUPLICATED | IN_IFF_DETACHED)
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#endif
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/* Prefer our macro */
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#ifdef HTONL
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#undef HTONL
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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#define HTONL(A) (A)
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#elif BYTE_ORDER == LITTLE_ENDIAN
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#define HTONL(A) \
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((((uint32_t)(A) & 0xff000000) >> 24) | \
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(((uint32_t)(A) & 0x00ff0000) >> 8) | \
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(((uint32_t)(A) & 0x0000ff00) << 8) | \
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(((uint32_t)(A) & 0x000000ff) << 24))
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#else
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#error Endian unknown
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#endif /* BYTE_ORDER */
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struct rt {
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TAILQ_ENTRY(rt) next;
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struct in_addr dest;
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struct in_addr net;
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struct in_addr gate;
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const struct interface *iface;
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#ifdef HAVE_ROUTE_METRIC
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unsigned int metric;
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#endif
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unsigned int mtu;
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struct in_addr src;
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unsigned int flags;
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unsigned int state;
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};
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TAILQ_HEAD(rt_head, rt);
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struct ipv4_addr {
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TAILQ_ENTRY(ipv4_addr) next;
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struct in_addr addr;
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struct in_addr net;
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struct in_addr dst;
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struct interface *iface;
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int addr_flags;
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};
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TAILQ_HEAD(ipv4_addrhead, ipv4_addr);
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struct ipv4_state {
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struct ipv4_addrhead addrs;
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struct rt_head routes;
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#ifdef BSD
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/* Buffer for BPF */
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size_t buffer_size, buffer_len, buffer_pos;
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unsigned char *buffer;
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#endif
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};
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#define IPV4_STATE(ifp) \
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((struct ipv4_state *)(ifp)->if_data[IF_DATA_IPV4])
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#define IPV4_CSTATE(ifp) \
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((const struct ipv4_state *)(ifp)->if_data[IF_DATA_IPV4])
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#ifdef INET
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struct ipv4_state *ipv4_getstate(struct interface *);
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int ipv4_init(struct dhcpcd_ctx *);
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int ipv4_protocol_fd(const struct interface *, uint16_t);
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int ipv4_ifcmp(const struct interface *, const struct interface *);
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uint8_t inet_ntocidr(struct in_addr);
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int inet_cidrtoaddr(int, struct in_addr *);
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uint32_t ipv4_getnetmask(uint32_t);
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int ipv4_hasaddr(const struct interface *);
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#define STATE_ADDED 0x01
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#define STATE_FAKE 0x02
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void ipv4_buildroutes(struct dhcpcd_ctx *);
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int ipv4_deladdr(struct interface *, const struct in_addr *,
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const struct in_addr *, int);
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int ipv4_preferanother(struct interface *);
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struct ipv4_addr *ipv4_addaddr(struct interface *,
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const struct in_addr *, const struct in_addr *, const struct in_addr *);
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void ipv4_applyaddr(void *);
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int ipv4_handlert(struct dhcpcd_ctx *, int, const struct rt *, int);
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void ipv4_freerts(struct rt_head *);
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struct ipv4_addr *ipv4_iffindaddr(struct interface *,
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const struct in_addr *, const struct in_addr *);
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struct ipv4_addr *ipv4_iffindlladdr(struct interface *);
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struct ipv4_addr *ipv4_findaddr(struct dhcpcd_ctx *, const struct in_addr *);
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struct ipv4_addr *ipv4_findmaskaddr(struct dhcpcd_ctx *,
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const struct in_addr *);
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int ipv4_srcaddr(const struct rt *, struct in_addr *);
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void ipv4_handleifa(struct dhcpcd_ctx *, int, struct if_head *, const char *,
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const struct in_addr *, const struct in_addr *, const struct in_addr *,
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int);
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void ipv4_freeroutes(struct rt_head *);
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void ipv4_free(struct interface *);
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void ipv4_ctxfree(struct dhcpcd_ctx *);
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#else
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#define ipv4_init(a) (-1)
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#define ipv4_sortinterfaces(a) {}
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#define ipv4_applyaddr(a) {}
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#define ipv4_freeroutes(a) {}
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#define ipv4_free(a) {}
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#define ipv4_ctxfree(a) {}
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#define ipv4_hasaddr(a) (0)
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#define ipv4_preferanother(a) {}
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#endif
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#endif
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