1 /* 2 * dhcpcd - DHCP client daemon 3 * SPDX-License-Identifier: BSD-2-Clause 4 * Copyright (c) 2006-2025 Roy Marples <roy (at) marples.name> 5 * All rights reserved 6 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 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 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef DHCPCOMMON_H 30 #define DHCPCOMMON_H 31 32 #include <netinet/in.h> 33 34 #include <arpa/inet.h> 35 #include <arpa/nameser.h> /* after normal includes for sunos */ 36 #include <stdint.h> 37 38 #include "common.h" 39 #include "dhcpcd.h" 40 41 /* Support very old arpa/nameser.h as found in OpenBSD */ 42 #ifndef NS_MAXDNAME 43 #define NS_MAXCDNAME MAXCDNAME 44 #define NS_MAXDNAME MAXDNAME 45 #define NS_MAXLABEL MAXLABEL 46 #endif 47 48 #define OT_REQUEST (1 << 0) 49 #define OT_UINT8 (1 << 1) 50 #define OT_INT8 (1 << 2) 51 #define OT_UINT16 (1 << 3) 52 #define OT_INT16 (1 << 4) 53 #define OT_UINT32 (1 << 5) 54 #define OT_INT32 (1 << 6) 55 #define OT_ADDRIPV4 (1 << 7) 56 #define OT_STRING (1 << 8) 57 #define OT_ARRAY (1 << 9) 58 #define OT_RFC3361 (1 << 10) 59 #define OT_RFC1035 (1 << 11) 60 #define OT_RFC3442 (1 << 12) 61 #define OT_OPTIONAL (1 << 13) 62 #define OT_ADDRIPV6 (1 << 14) 63 #define OT_BINHEX (1 << 15) 64 #define OT_FLAG (1 << 16) 65 #define OT_NOREQ (1 << 17) 66 #define OT_EMBED (1 << 18) 67 #define OT_ENCAP (1 << 19) 68 #define OT_INDEX (1 << 20) 69 #define OT_OPTION (1 << 21) 70 #define OT_DOMAIN (1 << 22) 71 #define OT_ASCII (1 << 23) 72 #define OT_RAW (1 << 24) 73 #define OT_ESCSTRING (1 << 25) 74 #define OT_ESCFILE (1 << 26) 75 #define OT_BITFLAG (1 << 27) 76 #define OT_RESERVED (1 << 28) 77 #define OT_URI (1 << 29) 78 #define OT_TRUNCATED (1 << 30) 79 80 struct dhcp_opt { 81 uint32_t option; /* Also used for IANA Enterpise Number */ 82 int type; 83 size_t len; 84 char *var; 85 86 int index; /* Index counter for many instances of the same option */ 87 char bitflags[8]; 88 89 /* Embedded options. 90 * The option code is irrelevant here. */ 91 struct dhcp_opt *embopts; 92 size_t embopts_len; 93 94 /* Encapsulated options */ 95 struct dhcp_opt *encopts; 96 size_t encopts_len; 97 }; 98 99 struct dho_policy_ctx { 100 const struct dhcp_opt *dopts; 101 size_t dopts_len; 102 const struct dhcp_opt *odopts; 103 size_t odopts_len; 104 }; 105 106 const char *dhcp_get_hostname(struct dhcpcd_ctx *, char *, size_t, 107 const struct if_options *); 108 struct dhcp_opt *vivso_find(uint32_t, const void *); 109 110 ssize_t dhcp_vendor(char *, size_t); 111 112 void dhcp_print_option_encoding(const struct dhcp_opt *opt, int cols); 113 const char *dhcp_option_string(const struct dhcp_opt *, size_t, uint32_t); 114 115 int dho_policy_has(const struct dho_policy *policy, uint32_t option); 116 int dho_policy_add(struct dho_policy *policy, uint32_t option); 117 int dho_policy_del(struct dho_policy *policy, uint32_t option); 118 int dho_policy_set(const struct dho_policy_ctx *, struct dho_policy *policy, 119 const char *opts, int add); 120 void dho_policy_free(struct dho_policy); 121 void dho_policy_group_free(struct dho_policy_group); 122 int dho_policy_check(const struct dho_policy *, int (*)(uint32_t, void *), 123 void *); 124 125 int dho_policy_requested(const struct dho_policy_group *, uint32_t); 126 int dho_policy_opt_requested(const struct dho_policy_group *, 127 const struct dhcp_opt *); 128 int dho_policy_removed(const struct dho_policy_group *, uint32_t); 129 int dho_policy_allowed(const struct dho_policy_group *, uint32_t); 130 131 size_t encode_rfc1035(const char *src, uint8_t *dst); 132 ssize_t decode_rfc1035(char *, size_t, const uint8_t *, size_t); 133 ssize_t print_string(char *, size_t, int, const void *, size_t); 134 int dhcp_set_leasefile(char *, size_t, int, const struct interface *); 135 136 void dhcp_envoption(struct dhcpcd_ctx *, FILE *, const char *, const char *, 137 struct dhcp_opt *, 138 const uint8_t *(*dgetopt)(struct dhcpcd_ctx *, size_t *, unsigned int *, 139 size_t *, const uint8_t *, size_t, struct dhcp_opt **), 140 const uint8_t *od, size_t ol); 141 void dhcp_zero_index(struct dhcp_opt *); 142 143 ssize_t dhcp_readfile(struct dhcpcd_ctx *, const char *, void **, size_t *); 144 ssize_t dhcp_writefile(struct dhcpcd_ctx *, const char *, mode_t, const void *, 145 size_t); 146 int dhcp_filemtime(struct dhcpcd_ctx *, const char *, time_t *); 147 int dhcp_unlink(struct dhcpcd_ctx *, const char *); 148 size_t dhcp_read_hwaddr_aton(struct dhcpcd_ctx *, uint8_t **, const char *); 149 #endif 150
Indexes created Wed Sep 02 00:25:50 UTC 2026