1 /* $NetBSD: dhcp-common.h,v 1.10 2015/07/09 10:15:34 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 DHCPCOMMON_H 31 #define DHCPCOMMON_H 32 33 #include <arpa/inet.h> 34 #include <netinet/in.h> 35 36 #include <stdint.h> 37 38 #include "common.h" 39 #include "dhcpcd.h" 40 41 /* Max MTU - defines dhcp option length */ 42 #define MTU_MAX 1500 43 #define MTU_MIN 576 44 45 #define REQUEST (1 << 0) 46 #define UINT8 (1 << 1) 47 #define UINT16 (1 << 2) 48 #define SINT16 (1 << 3) 49 #define UINT32 (1 << 4) 50 #define SINT32 (1 << 5) 51 #define ADDRIPV4 (1 << 6) 52 #define STRING (1 << 7) 53 #define ARRAY (1 << 8) 54 #define RFC3361 (1 << 9) 55 #define RFC1035 (1 << 10) 56 #define RFC3442 (1 << 11) 57 #define RFC5969 (1 << 12) 58 #define ADDRIPV6 (1 << 13) 59 #define BINHEX (1 << 14) 60 #define FLAG (1 << 15) 61 #define NOREQ (1 << 16) 62 #define EMBED (1 << 17) 63 #define ENCAP (1 << 18) 64 #define INDEX (1 << 19) 65 #define OPTION (1 << 20) 66 #define DOMAIN (1 << 21) 67 #define ASCII (1 << 22) 68 #define RAW (1 << 23) 69 #define ESCSTRING (1 << 24) 70 #define ESCFILE (1 << 25) 71 #define BITFLAG (1 << 26) 72 #define RESERVED (1 << 27) 73 74 struct dhcp_opt { 75 uint32_t option; /* Also used for IANA Enterpise Number */ 76 int type; 77 size_t len; 78 char *var; 79 80 int index; /* Index counter for many instances of the same option */ 81 char bitflags[8]; 82 83 /* Embedded options. 84 * The option code is irrelevant here. */ 85 struct dhcp_opt *embopts; 86 size_t embopts_len; 87 88 /* Encapsulated options */ 89 struct dhcp_opt *encopts; 90 size_t encopts_len; 91 }; 92 93 struct dhcp_opt *vivso_find(uint32_t, const void *); 94 95 ssize_t dhcp_vendor(char *, size_t); 96 97 void dhcp_print_option_encoding(const struct dhcp_opt *opt, int cols); 98 #define add_option_mask(var, val) \ 99 ((var)[(val) >> 3] = (uint8_t)((var)[(val) >> 3] | 1 << ((val) & 7))) 100 #define del_option_mask(var, val) \ 101 ((var)[(val) >> 3] = (uint8_t)((var)[(val) >> 3] & ~(1 << ((val) & 7)))) 102 #define has_option_mask(var, val) \ 103 ((var)[(val) >> 3] & (uint8_t)(1 << ((val) & 7))) 104 int make_option_mask(const struct dhcp_opt *, size_t, 105 const struct dhcp_opt *, size_t, 106 uint8_t *, const char *, int); 107 108 size_t encode_rfc1035(const char *src, uint8_t *dst); 109 ssize_t decode_rfc1035(char *, size_t, const uint8_t *, size_t); 110 ssize_t print_string(char *, size_t, int, const uint8_t *, size_t); 111 int dhcp_set_leasefile(char *, size_t, int, const struct interface *); 112 113 size_t dhcp_envoption(struct dhcpcd_ctx *, 114 char **, const char *, const char *, struct dhcp_opt *, 115 const uint8_t *(*dgetopt)(struct dhcpcd_ctx *, 116 size_t *, unsigned int *, size_t *, 117 const uint8_t *, size_t, struct dhcp_opt **), 118 const uint8_t *od, size_t ol); 119 void dhcp_zero_index(struct dhcp_opt *); 120 121 #endif 122