1 /* $NetBSD: ipv4.h,v 1.13 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 IPV4_H 31 #define IPV4_H 32 33 #include "dhcpcd.h" 34 35 #ifdef IN_IFF_TENTATIVE 36 #define IN_IFF_NOTUSEABLE \ 37 (IN_IFF_TENTATIVE | IN_IFF_DUPLICATED | IN_IFF_DETACHED) 38 #endif 39 40 /* Prefer our macro */ 41 #ifdef HTONL 42 #undef HTONL 43 #endif 44 45 #if BYTE_ORDER == BIG_ENDIAN 46 #define HTONL(A) (A) 47 #elif BYTE_ORDER == LITTLE_ENDIAN 48 #define HTONL(A) \ 49 ((((uint32_t)(A) & 0xff000000) >> 24) | \ 50 (((uint32_t)(A) & 0x00ff0000) >> 8) | \ 51 (((uint32_t)(A) & 0x0000ff00) << 8) | \ 52 (((uint32_t)(A) & 0x000000ff) << 24)) 53 #else 54 #error Endian unknown 55 #endif /* BYTE_ORDER */ 56 57 struct rt { 58 TAILQ_ENTRY(rt) next; 59 struct in_addr dest; 60 struct in_addr net; 61 struct in_addr gate; 62 const struct interface *iface; 63 #ifdef HAVE_ROUTE_METRIC 64 unsigned int metric; 65 #endif 66 unsigned int mtu; 67 struct in_addr src; 68 unsigned int flags; 69 unsigned int state; 70 }; 71 TAILQ_HEAD(rt_head, rt); 72 73 struct ipv4_addr { 74 TAILQ_ENTRY(ipv4_addr) next; 75 struct in_addr addr; 76 struct in_addr net; 77 struct in_addr dst; 78 struct interface *iface; 79 int addr_flags; 80 }; 81 TAILQ_HEAD(ipv4_addrhead, ipv4_addr); 82 83 struct ipv4_state { 84 struct ipv4_addrhead addrs; 85 struct rt_head routes; 86 87 #ifdef BSD 88 /* Buffer for BPF */ 89 size_t buffer_size, buffer_len, buffer_pos; 90 unsigned char *buffer; 91 #endif 92 }; 93 94 #define IPV4_STATE(ifp) \ 95 ((struct ipv4_state *)(ifp)->if_data[IF_DATA_IPV4]) 96 #define IPV4_CSTATE(ifp) \ 97 ((const struct ipv4_state *)(ifp)->if_data[IF_DATA_IPV4]) 98 99 #ifdef INET 100 struct ipv4_state *ipv4_getstate(struct interface *); 101 int ipv4_init(struct dhcpcd_ctx *); 102 int ipv4_protocol_fd(const struct interface *, uint16_t); 103 int ipv4_ifcmp(const struct interface *, const struct interface *); 104 uint8_t inet_ntocidr(struct in_addr); 105 int inet_cidrtoaddr(int, struct in_addr *); 106 uint32_t ipv4_getnetmask(uint32_t); 107 int ipv4_hasaddr(const struct interface *); 108 109 #define STATE_ADDED 0x01 110 #define STATE_FAKE 0x02 111 112 void ipv4_buildroutes(struct dhcpcd_ctx *); 113 int ipv4_deladdr(struct interface *, const struct in_addr *, 114 const struct in_addr *, int); 115 int ipv4_preferanother(struct interface *); 116 struct ipv4_addr *ipv4_addaddr(struct interface *, 117 const struct in_addr *, const struct in_addr *, const struct in_addr *); 118 void ipv4_applyaddr(void *); 119 int ipv4_handlert(struct dhcpcd_ctx *, int, struct rt *); 120 void ipv4_freerts(struct rt_head *); 121 122 struct ipv4_addr *ipv4_iffindaddr(struct interface *, 123 const struct in_addr *, const struct in_addr *); 124 struct ipv4_addr *ipv4_iffindlladdr(struct interface *); 125 struct ipv4_addr *ipv4_findaddr(struct dhcpcd_ctx *, const struct in_addr *); 126 void ipv4_handleifa(struct dhcpcd_ctx *, int, struct if_head *, const char *, 127 const struct in_addr *, const struct in_addr *, const struct in_addr *, 128 int); 129 130 void ipv4_freeroutes(struct rt_head *); 131 132 void ipv4_free(struct interface *); 133 void ipv4_ctxfree(struct dhcpcd_ctx *); 134 #else 135 #define ipv4_init(a) (-1) 136 #define ipv4_sortinterfaces(a) {} 137 #define ipv4_applyaddr(a) {} 138 #define ipv4_freeroutes(a) {} 139 #define ipv4_free(a) {} 140 #define ipv4_ctxfree(a) {} 141 #define ipv4_hasaddr(a) (0) 142 #define ipv4_preferanother(a) (0) 143 #endif 144 145 #endif 146