1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2015 Roy Marples <roy@marples.name> 4 * All rights reserved 5 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef DHCPCOMMON_H 29 #define DHCPCOMMON_H 30 31 #include <arpa/inet.h> 32 #include <netinet/in.h> 33 34 #include <stdint.h> 35 36 #include "common.h" 37 #include "dhcpcd.h" 38 39 /* Max MTU - defines dhcp option length */ 40 #define MTU_MAX 1500 41 #define MTU_MIN 576 42 43 #define REQUEST (1 << 0) 44 #define UINT8 (1 << 1) 45 #define UINT16 (1 << 2) 46 #define SINT16 (1 << 3) 47 #define UINT32 (1 << 4) 48 #define SINT32 (1 << 5) 49 #define ADDRIPV4 (1 << 6) 50 #define STRING (1 << 7) 51 #define ARRAY (1 << 8) 52 #define RFC3361 (1 << 9) 53 #define RFC3397 (1 << 10) 54 #define RFC3442 (1 << 11) 55 #define RFC5969 (1 << 12) 56 #define ADDRIPV6 (1 << 13) 57 #define BINHEX (1 << 14) 58 #define FLAG (1 << 15) 59 #define NOREQ (1 << 16) 60 #define EMBED (1 << 17) 61 #define ENCAP (1 << 18) 62 #define INDEX (1 << 19) 63 #define OPTION (1 << 20) 64 #define DOMAIN (1 << 21) 65 #define ASCII (1 << 22) 66 #define RAW (1 << 23) 67 #define ESCSTRING (1 << 24) 68 #define ESCFILE (1 << 25) 69 #define BITFLAG (1 << 26) 70 71 struct dhcp_opt { 72 uint32_t option; /* Also used for IANA Enterpise Number */ 73 int type; 74 size_t len; 75 char *var; 76 77 int index; /* Index counter for many instances of the same option */ 78 79 /* Embedded options. 80 * The option code is irrelevant here. */ 81 struct dhcp_opt *embopts; 82 size_t embopts_len; 83 84 /* Encapsulated options */ 85 struct dhcp_opt *encopts; 86 size_t encopts_len; 87 }; 88 89 struct dhcp_opt *vivso_find(uint32_t, const void *); 90 91 ssize_t dhcp_vendor(char *, size_t); 92 93 void dhcp_print_option_encoding(const struct dhcp_opt *opt, int cols); 94 #define add_option_mask(var, val) \ 95 ((var)[(val) >> 3] = (uint8_t)((var)[(val) >> 3] | 1 << ((val) & 7))) 96 #define del_option_mask(var, val) \ 97 ((var)[(val) >> 3] = (uint8_t)((var)[(val) >> 3] & ~(1 << ((val) & 7)))) 98 #define has_option_mask(var, val) \ 99 ((var)[(val) >> 3] & (uint8_t)(1 << ((val) & 7))) 100 int make_option_mask(const struct dhcp_opt *, size_t, 101 const struct dhcp_opt *, size_t, 102 uint8_t *, const char *, int); 103 104 size_t encode_rfc1035(const char *src, uint8_t *dst); 105 ssize_t decode_rfc3397(char *, size_t, const uint8_t *, size_t); 106 ssize_t print_string(char *, size_t, int, const uint8_t *, size_t); 107 ssize_t print_option(char *, size_t, int, const uint8_t *, size_t, 108 const char *); 109 int dhcp_set_leasefile(char *, size_t, int, 110 const struct interface *, const char *); 111 112 size_t dhcp_envoption(struct dhcpcd_ctx *, 113 char **, const char *, const char *, struct dhcp_opt *, 114 const uint8_t *(*dgetopt)(struct dhcpcd_ctx *, 115 size_t *, unsigned int *, size_t *, 116 const uint8_t *, size_t, struct dhcp_opt **), 117 const uint8_t *od, size_t ol); 118 void dhcp_zero_index(struct dhcp_opt *); 119 120 #endif 121