"Robert P. J. Day" | 63fc1a9 | 2006-07-02 19:47:05 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Denys Vlasenko | 385b456 | 2010-03-26 10:09:34 +0100 | [diff] [blame] | 2 | /* |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 3 | * Russ Dill <Russ.Dill@asu.edu> September 2001 |
| 4 | * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003 |
| 5 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame] | 6 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 7 | */ |
Denis Vlasenko | f81e8db | 2009-04-09 12:35:13 +0000 | [diff] [blame] | 8 | #ifndef UDHCP_COMMON_H |
| 9 | #define UDHCP_COMMON_H 1 |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 10 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 11 | #include "libbb.h" |
Denys Vlasenko | e6a2f4c | 2016-04-21 16:26:30 +0200 | [diff] [blame] | 12 | #include "common_bufsiz.h" |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 13 | #include <netinet/udp.h> |
| 14 | #include <netinet/ip.h> |
| 15 | |
Denis Vlasenko | f81e8db | 2009-04-09 12:35:13 +0000 | [diff] [blame] | 16 | PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 17 | |
Denys Vlasenko | 5cfb818 | 2012-07-26 12:58:41 +0200 | [diff] [blame] | 18 | extern const uint8_t MAC_BCAST_ADDR[6] ALIGN2; /* six all-ones */ |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 19 | |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 20 | |
| 21 | /*** DHCP packet ***/ |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 22 | |
Denys Vlasenko | c7dc79e | 2010-03-21 06:15:28 +0100 | [diff] [blame] | 23 | /* DHCP protocol. See RFC 2131 */ |
| 24 | #define DHCP_MAGIC 0x63825363 |
Denys Vlasenko | c7dc79e | 2010-03-21 06:15:28 +0100 | [diff] [blame] | 25 | #define DHCP_OPTIONS_BUFSIZE 308 |
Denys Vlasenko | c7dc79e | 2010-03-21 06:15:28 +0100 | [diff] [blame] | 26 | #define BOOTREQUEST 1 |
| 27 | #define BOOTREPLY 2 |
Denis Vlasenko | 72e7604 | 2007-11-25 03:15:24 +0000 | [diff] [blame] | 28 | |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 29 | //TODO: rename ciaddr/yiaddr/chaddr |
| 30 | struct dhcp_packet { |
Denys Vlasenko | c7dc79e | 2010-03-21 06:15:28 +0100 | [diff] [blame] | 31 | uint8_t op; /* BOOTREQUEST or BOOTREPLY */ |
Denis Vlasenko | 739e30f | 2008-09-26 23:45:20 +0000 | [diff] [blame] | 32 | uint8_t htype; /* hardware address type. 1 = 10mb ethernet */ |
| 33 | uint8_t hlen; /* hardware address length */ |
| 34 | uint8_t hops; /* used by relay agents only */ |
| 35 | uint32_t xid; /* unique id */ |
| 36 | uint16_t secs; /* elapsed since client began acquisition/renewal */ |
| 37 | uint16_t flags; /* only one flag so far: */ |
| 38 | #define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */ |
| 39 | uint32_t ciaddr; /* client IP (if client is in BOUND, RENEW or REBINDING state) */ |
| 40 | uint32_t yiaddr; /* 'your' (client) IP address */ |
Denys Vlasenko | 56f2d06 | 2009-06-16 10:25:35 +0200 | [diff] [blame] | 41 | /* IP address of next server to use in bootstrap, returned in DHCPOFFER, DHCPACK by server */ |
| 42 | uint32_t siaddr_nip; |
Denys Vlasenko | 990a617 | 2009-06-16 10:23:55 +0200 | [diff] [blame] | 43 | uint32_t gateway_nip; /* relay agent IP address */ |
Denys Vlasenko | 56f2d06 | 2009-06-16 10:25:35 +0200 | [diff] [blame] | 44 | uint8_t chaddr[16]; /* link-layer client hardware address (MAC) */ |
| 45 | uint8_t sname[64]; /* server host name (ASCIZ) */ |
| 46 | uint8_t file[128]; /* boot file name (ASCIZ) */ |
| 47 | uint32_t cookie; /* fixed first four option bytes (99,130,83,99 dec) */ |
Denis Vlasenko | 72e7604 | 2007-11-25 03:15:24 +0000 | [diff] [blame] | 48 | uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS]; |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 49 | } PACKED; |
Denys Vlasenko | e5ce91b | 2010-03-21 00:43:11 +0100 | [diff] [blame] | 50 | #define DHCP_PKT_SNAME_LEN 64 |
| 51 | #define DHCP_PKT_FILE_LEN 128 |
| 52 | #define DHCP_PKT_SNAME_LEN_STR "64" |
| 53 | #define DHCP_PKT_FILE_LEN_STR "128" |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 54 | |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 55 | struct ip_udp_dhcp_packet { |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 56 | struct iphdr ip; |
| 57 | struct udphdr udp; |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 58 | struct dhcp_packet data; |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 59 | } PACKED; |
Denis Vlasenko | 6884f66 | 2007-11-23 00:08:54 +0000 | [diff] [blame] | 60 | |
Denys Vlasenko | b7d19cc | 2010-05-30 23:41:23 +0200 | [diff] [blame] | 61 | struct udp_dhcp_packet { |
| 62 | struct udphdr udp; |
| 63 | struct dhcp_packet data; |
| 64 | } PACKED; |
| 65 | |
| 66 | enum { |
Denys Vlasenko | 2c3b71a | 2010-10-20 18:04:36 +0200 | [diff] [blame] | 67 | IP_UDP_DHCP_SIZE = sizeof(struct ip_udp_dhcp_packet) - CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS, |
| 68 | UDP_DHCP_SIZE = sizeof(struct udp_dhcp_packet) - CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS, |
Denys Vlasenko | b7d19cc | 2010-05-30 23:41:23 +0200 | [diff] [blame] | 69 | DHCP_SIZE = sizeof(struct dhcp_packet) - CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS, |
| 70 | }; |
| 71 | |
Denis Vlasenko | 6884f66 | 2007-11-23 00:08:54 +0000 | [diff] [blame] | 72 | /* Let's see whether compiler understood us right */ |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 73 | struct BUG_bad_sizeof_struct_ip_udp_dhcp_packet { |
Denys Vlasenko | 2c3b71a | 2010-10-20 18:04:36 +0200 | [diff] [blame] | 74 | char c[IP_UDP_DHCP_SIZE == 576 ? 1 : -1]; |
Denis Vlasenko | 5a3395b | 2006-11-18 19:51:32 +0000 | [diff] [blame] | 75 | }; |
| 76 | |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 77 | |
| 78 | /*** Options ***/ |
| 79 | |
| 80 | enum { |
| 81 | OPTION_IP = 1, |
| 82 | OPTION_IP_PAIR, |
| 83 | OPTION_STRING, |
Denys Vlasenko | 7280d20 | 2011-12-08 16:41:05 +0100 | [diff] [blame] | 84 | /* Opts of STRING_HOST type will be sanitized before they are passed |
| 85 | * to udhcpc script's environment: */ |
| 86 | OPTION_STRING_HOST, |
Denys Vlasenko | a8f6b99 | 2010-03-26 08:35:24 +0100 | [diff] [blame] | 87 | // OPTION_BOOLEAN, |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 88 | OPTION_U8, |
| 89 | OPTION_U16, |
Denys Vlasenko | a8f6b99 | 2010-03-26 08:35:24 +0100 | [diff] [blame] | 90 | // OPTION_S16, |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 91 | OPTION_U32, |
| 92 | OPTION_S32, |
Denys Vlasenko | 4f3aa51 | 2010-04-04 15:31:12 +0200 | [diff] [blame] | 93 | OPTION_BIN, |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 94 | OPTION_STATIC_ROUTES, |
Denys Vlasenko | 1f56e51 | 2011-10-19 22:40:35 +0200 | [diff] [blame] | 95 | OPTION_6RD, |
Denys Vlasenko | ba4fbca | 2017-06-28 19:18:17 +0200 | [diff] [blame] | 96 | #if ENABLE_FEATURE_UDHCP_RFC3397 || ENABLE_FEATURE_UDHCPC6_RFC3646 || ENABLE_FEATURE_UDHCPC6_RFC4704 |
Denys Vlasenko | 4f3aa51 | 2010-04-04 15:31:12 +0200 | [diff] [blame] | 97 | OPTION_DNS_STRING, /* RFC1035 compressed domain name list */ |
Denys Vlasenko | ba4fbca | 2017-06-28 19:18:17 +0200 | [diff] [blame] | 98 | #endif |
| 99 | #if ENABLE_FEATURE_UDHCP_RFC3397 |
Denys Vlasenko | 4f3aa51 | 2010-04-04 15:31:12 +0200 | [diff] [blame] | 100 | OPTION_SIP_SERVERS, |
| 101 | #endif |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 102 | |
| 103 | OPTION_TYPE_MASK = 0x0f, |
| 104 | /* Client requests this option by default */ |
| 105 | OPTION_REQ = 0x10, |
| 106 | /* There can be a list of 1 or more of these */ |
| 107 | OPTION_LIST = 0x20, |
| 108 | }; |
| 109 | |
| 110 | /* DHCP option codes (partial list). See RFC 2132 and |
| 111 | * http://www.iana.org/assignments/bootp-dhcp-parameters/ |
| 112 | * Commented out options are handled by common option machinery, |
Denys Vlasenko | f461385 | 2011-10-20 08:54:16 +0200 | [diff] [blame] | 113 | * uncommented ones have special cases (grep for them to see). |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 114 | */ |
| 115 | #define DHCP_PADDING 0x00 |
| 116 | #define DHCP_SUBNET 0x01 |
| 117 | //#define DHCP_TIME_OFFSET 0x02 /* (localtime - UTC_time) in seconds. signed */ |
| 118 | //#define DHCP_ROUTER 0x03 |
| 119 | //#define DHCP_TIME_SERVER 0x04 /* RFC 868 time server (32-bit, 0 = 1.1.1900) */ |
| 120 | //#define DHCP_NAME_SERVER 0x05 /* IEN 116 _really_ ancient kind of NS */ |
| 121 | //#define DHCP_DNS_SERVER 0x06 |
| 122 | //#define DHCP_LOG_SERVER 0x07 /* port 704 UDP log (not syslog) |
| 123 | //#define DHCP_COOKIE_SERVER 0x08 /* "quote of the day" server */ |
| 124 | //#define DHCP_LPR_SERVER 0x09 |
| 125 | #define DHCP_HOST_NAME 0x0c /* either client informs server or server gives name to client */ |
| 126 | //#define DHCP_BOOT_SIZE 0x0d |
| 127 | //#define DHCP_DOMAIN_NAME 0x0f /* server gives domain suffix */ |
| 128 | //#define DHCP_SWAP_SERVER 0x10 |
| 129 | //#define DHCP_ROOT_PATH 0x11 |
| 130 | //#define DHCP_IP_TTL 0x17 |
| 131 | //#define DHCP_MTU 0x1a |
| 132 | //#define DHCP_BROADCAST 0x1c |
Vladislav Grishenko | 7d3a48a | 2010-09-26 00:15:12 +0200 | [diff] [blame] | 133 | //#define DHCP_ROUTES 0x21 |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 134 | //#define DHCP_NIS_DOMAIN 0x28 |
| 135 | //#define DHCP_NIS_SERVER 0x29 |
| 136 | //#define DHCP_NTP_SERVER 0x2a |
| 137 | //#define DHCP_WINS_SERVER 0x2c |
| 138 | #define DHCP_REQUESTED_IP 0x32 /* sent by client if specific IP is wanted */ |
| 139 | #define DHCP_LEASE_TIME 0x33 |
| 140 | #define DHCP_OPTION_OVERLOAD 0x34 |
| 141 | #define DHCP_MESSAGE_TYPE 0x35 |
| 142 | #define DHCP_SERVER_ID 0x36 /* by default server's IP */ |
| 143 | #define DHCP_PARAM_REQ 0x37 /* list of options client wants */ |
| 144 | //#define DHCP_ERR_MESSAGE 0x38 /* error message when sending NAK etc */ |
| 145 | #define DHCP_MAX_SIZE 0x39 |
| 146 | #define DHCP_VENDOR 0x3c /* client's vendor (a string) */ |
| 147 | #define DHCP_CLIENT_ID 0x3d /* by default client's MAC addr, but may be arbitrarily long */ |
| 148 | //#define DHCP_TFTP_SERVER_NAME 0x42 /* same as 'sname' field */ |
| 149 | //#define DHCP_BOOT_FILE 0x43 /* same as 'file' field */ |
| 150 | //#define DHCP_USER_CLASS 0x4d /* RFC 3004. set of LASCII strings. "I am a printer" etc */ |
| 151 | #define DHCP_FQDN 0x51 /* client asks to update DNS to map its FQDN to its new IP */ |
| 152 | //#define DHCP_DOMAIN_SEARCH 0x77 /* RFC 3397. set of ASCIZ string, DNS-style compressed */ |
Denys Vlasenko | 243ddcb | 2010-04-03 17:34:52 +0200 | [diff] [blame] | 153 | //#define DHCP_SIP_SERVERS 0x78 /* RFC 3361. flag byte, then: 0: domain names, 1: IP addrs */ |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 154 | //#define DHCP_STATIC_ROUTES 0x79 /* RFC 3442. (mask,ip,router) tuples */ |
Jeremy Kerr | d3092c9 | 2013-11-12 11:18:26 +0100 | [diff] [blame] | 155 | //#define DHCP_VLAN_ID 0x84 /* 802.1P VLAN ID */ |
| 156 | //#define DHCP_VLAN_PRIORITY 0x85 /* 802.1Q VLAN priority */ |
| 157 | //#define DHCP_PXE_CONF_FILE 0xd1 /* RFC 5071 Configuration File */ |
Jeremy Kerr | b8ffd11 | 2014-07-15 11:03:17 +0800 | [diff] [blame] | 158 | //#define DHCP_PXE_PATH_PREFIX 0xd2 /* RFC 5071 Configuration File */ |
Vladislav Grishenko | 7d3a48a | 2010-09-26 00:15:12 +0200 | [diff] [blame] | 159 | //#define DHCP_MS_STATIC_ROUTES 0xf9 /* Microsoft's pre-RFC 3442 code for 0x79? */ |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 160 | //#define DHCP_WPAD 0xfc /* MSIE's Web Proxy Autodiscovery Protocol */ |
| 161 | #define DHCP_END 0xff |
| 162 | |
| 163 | /* Offsets in option byte sequence */ |
| 164 | #define OPT_CODE 0 |
| 165 | #define OPT_LEN 1 |
| 166 | #define OPT_DATA 2 |
| 167 | /* Bits in "overload" option */ |
| 168 | #define OPTION_FIELD 0 |
| 169 | #define FILE_FIELD 1 |
| 170 | #define SNAME_FIELD 2 |
| 171 | |
| 172 | /* DHCP_MESSAGE_TYPE values */ |
| 173 | #define DHCPDISCOVER 1 /* client -> server */ |
| 174 | #define DHCPOFFER 2 /* client <- server */ |
| 175 | #define DHCPREQUEST 3 /* client -> server */ |
| 176 | #define DHCPDECLINE 4 /* client -> server */ |
| 177 | #define DHCPACK 5 /* client <- server */ |
| 178 | #define DHCPNAK 6 /* client <- server */ |
| 179 | #define DHCPRELEASE 7 /* client -> server */ |
| 180 | #define DHCPINFORM 8 /* client -> server */ |
| 181 | #define DHCP_MINTYPE DHCPDISCOVER |
| 182 | #define DHCP_MAXTYPE DHCPINFORM |
| 183 | |
Denys Vlasenko | c03602b | 2010-04-04 15:28:49 +0200 | [diff] [blame] | 184 | struct dhcp_optflag { |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 185 | uint8_t flags; |
| 186 | uint8_t code; |
| 187 | }; |
| 188 | |
Denys Vlasenko | 7e6add1 | 2010-03-25 20:32:38 +0100 | [diff] [blame] | 189 | struct option_set { |
| 190 | uint8_t *data; |
| 191 | struct option_set *next; |
| 192 | }; |
| 193 | |
Denys Vlasenko | ba4fbca | 2017-06-28 19:18:17 +0200 | [diff] [blame] | 194 | #if ENABLE_UDHCPC || ENABLE_UDHCPD |
Denys Vlasenko | c03602b | 2010-04-04 15:28:49 +0200 | [diff] [blame] | 195 | extern const struct dhcp_optflag dhcp_optflags[]; |
Michael Tokarev | 32f774c | 2012-07-24 15:56:37 +0200 | [diff] [blame] | 196 | extern const char dhcp_option_strings[] ALIGN1; |
Denys Vlasenko | ba4fbca | 2017-06-28 19:18:17 +0200 | [diff] [blame] | 197 | #endif |
Michael Tokarev | 32f774c | 2012-07-24 15:56:37 +0200 | [diff] [blame] | 198 | extern const uint8_t dhcp_option_lengths[] ALIGN1; |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 199 | |
Denys Vlasenko | ba4fbca | 2017-06-28 19:18:17 +0200 | [diff] [blame] | 200 | unsigned FAST_FUNC udhcp_option_idx(const char *name, const char *option_strings); |
Denys Vlasenko | 9107b63 | 2010-03-27 23:23:41 +0100 | [diff] [blame] | 201 | |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 202 | uint8_t *udhcp_get_option(struct dhcp_packet *packet, int code) FAST_FUNC; |
| 203 | int udhcp_end_option(uint8_t *optionptr) FAST_FUNC; |
Denys Vlasenko | 7724c76 | 2010-03-26 09:32:09 +0100 | [diff] [blame] | 204 | void udhcp_add_binary_option(struct dhcp_packet *packet, uint8_t *addopt) FAST_FUNC; |
Denys Vlasenko | ba4fbca | 2017-06-28 19:18:17 +0200 | [diff] [blame] | 205 | #if ENABLE_UDHCPC || ENABLE_UDHCPD |
Denys Vlasenko | 7724c76 | 2010-03-26 09:32:09 +0100 | [diff] [blame] | 206 | void udhcp_add_simple_option(struct dhcp_packet *packet, uint8_t code, uint32_t data) FAST_FUNC; |
Denys Vlasenko | ba4fbca | 2017-06-28 19:18:17 +0200 | [diff] [blame] | 207 | #endif |
| 208 | #if ENABLE_FEATURE_UDHCP_RFC3397 || ENABLE_FEATURE_UDHCPC6_RFC3646 || ENABLE_FEATURE_UDHCPC6_RFC4704 |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 209 | char *dname_dec(const uint8_t *cstr, int clen, const char *pre) FAST_FUNC; |
| 210 | uint8_t *dname_enc(const uint8_t *cstr, int clen, const char *src, int *retlen) FAST_FUNC; |
| 211 | #endif |
Denys Vlasenko | 7724c76 | 2010-03-26 09:32:09 +0100 | [diff] [blame] | 212 | struct option_set *udhcp_find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC; |
Denys Vlasenko | 7e6add1 | 2010-03-25 20:32:38 +0100 | [diff] [blame] | 213 | |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 214 | |
Denys Vlasenko | c7dc79e | 2010-03-21 06:15:28 +0100 | [diff] [blame] | 215 | // RFC 2131 Table 5: Fields and options used by DHCP clients |
| 216 | // |
Denys Vlasenko | 37a658c | 2010-03-23 15:43:08 +0100 | [diff] [blame] | 217 | // Fields 'hops', 'yiaddr', 'siaddr', 'giaddr' are always zero |
Denys Vlasenko | c7dc79e | 2010-03-21 06:15:28 +0100 | [diff] [blame] | 218 | // |
Denys Vlasenko | 6b61629 | 2010-03-22 15:22:14 +0100 | [diff] [blame] | 219 | // Field DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE |
| 220 | // ----- ------------ ------------ ----------- ----------- ----------- |
| 221 | // 'xid' selected by client selected by client 'xid' from server selected by client selected by client |
| 222 | // DHCPOFFER message |
| 223 | // 'secs' 0 or seconds since 0 or seconds since 0 or seconds since 0 0 |
| 224 | // DHCP process started DHCP process started DHCP process started |
| 225 | // 'flags' Set 'BROADCAST' Set 'BROADCAST' Set 'BROADCAST' 0 0 |
| 226 | // flag if client flag if client flag if client |
| 227 | // requires broadcast requires broadcast requires broadcast |
| 228 | // reply reply reply |
| 229 | // 'ciaddr' 0 client's IP 0 or client's IP 0 client's IP |
| 230 | // (BOUND/RENEW/REBIND) |
| 231 | // 'chaddr' client's MAC client's MAC client's MAC client's MAC client's MAC |
| 232 | // 'sname' options or sname options or sname options or sname (unused) (unused) |
| 233 | // 'file' options or file options or file options or file (unused) (unused) |
| 234 | // 'options' options options options message type opt message type opt |
| 235 | // |
| 236 | // Option DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE |
| 237 | // ------ ------------ ---------- ----------- ----------- ----------- |
| 238 | // Requested IP address MAY MUST NOT MUST (in MUST MUST NOT |
| 239 | // SELECTING or |
| 240 | // INIT-REBOOT) |
| 241 | // MUST NOT (in |
| 242 | // BOUND or |
| 243 | // RENEWING) |
| 244 | // IP address lease time MAY MUST NOT MAY MUST NOT MUST NOT |
| 245 | // Use 'file'/'sname' fields MAY MAY MAY MAY MAY |
| 246 | // Client identifier MAY MAY MAY MAY MAY |
| 247 | // Vendor class identifier MAY MAY MAY MUST NOT MUST NOT |
| 248 | // Server identifier MUST NOT MUST NOT MUST (after MUST MUST |
| 249 | // SELECTING) |
| 250 | // MUST NOT (after |
| 251 | // INIT-REBOOT, |
| 252 | // BOUND, RENEWING |
| 253 | // or REBINDING) |
| 254 | // Parameter request list MAY MAY MAY MUST NOT MUST NOT |
| 255 | // Maximum message size MAY MAY MAY MUST NOT MUST NOT |
| 256 | // Message SHOULD NOT SHOULD NOT SHOULD NOT SHOULD SHOULD |
| 257 | // Site-specific MAY MAY MAY MUST NOT MUST NOT |
| 258 | // All others MAY MAY MAY MUST NOT MUST NOT |
Denys Vlasenko | c7dc79e | 2010-03-21 06:15:28 +0100 | [diff] [blame] | 259 | |
| 260 | |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 261 | /*** Logging ***/ |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 262 | |
Denys Vlasenko | ac906fa | 2009-06-17 11:54:52 +0200 | [diff] [blame] | 263 | #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1 |
Leonid Lisovskiy | 6c9c0a1 | 2011-10-18 00:35:47 +0200 | [diff] [blame] | 264 | # define IF_UDHCP_VERBOSE(...) __VA_ARGS__ |
Denys Vlasenko | 6947d2c | 2009-06-17 13:24:03 +0200 | [diff] [blame] | 265 | extern unsigned dhcp_verbose; |
Denys Vlasenko | 8f2e99c | 2016-03-30 18:41:23 +0200 | [diff] [blame] | 266 | # define log1(...) do { if (dhcp_verbose >= 1) bb_error_msg(__VA_ARGS__); } while (0) |
Denys Vlasenko | ac906fa | 2009-06-17 11:54:52 +0200 | [diff] [blame] | 267 | # if CONFIG_UDHCP_DEBUG >= 2 |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 268 | void udhcp_dump_packet(struct dhcp_packet *packet) FAST_FUNC; |
Denys Vlasenko | 8f2e99c | 2016-03-30 18:41:23 +0200 | [diff] [blame] | 269 | # define log2(...) do { if (dhcp_verbose >= 2) bb_error_msg(__VA_ARGS__); } while (0) |
Denys Vlasenko | ac906fa | 2009-06-17 11:54:52 +0200 | [diff] [blame] | 270 | # else |
| 271 | # define udhcp_dump_packet(...) ((void)0) |
| 272 | # define log2(...) ((void)0) |
| 273 | # endif |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 274 | # if CONFIG_UDHCP_DEBUG >= 3 |
Denys Vlasenko | 8f2e99c | 2016-03-30 18:41:23 +0200 | [diff] [blame] | 275 | # define log3(...) do { if (dhcp_verbose >= 3) bb_error_msg(__VA_ARGS__); } while (0) |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 276 | # else |
| 277 | # define log3(...) ((void)0) |
| 278 | # endif |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 279 | #else |
Leonid Lisovskiy | 6c9c0a1 | 2011-10-18 00:35:47 +0200 | [diff] [blame] | 280 | # define IF_UDHCP_VERBOSE(...) |
Denys Vlasenko | ac906fa | 2009-06-17 11:54:52 +0200 | [diff] [blame] | 281 | # define udhcp_dump_packet(...) ((void)0) |
| 282 | # define log1(...) ((void)0) |
| 283 | # define log2(...) ((void)0) |
Denys Vlasenko | 31af3d5 | 2009-06-17 11:57:09 +0200 | [diff] [blame] | 284 | # define log3(...) ((void)0) |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 285 | #endif |
| 286 | |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 287 | |
| 288 | /*** Other shared functions ***/ |
| 289 | |
Denys Vlasenko | a8f6b99 | 2010-03-26 08:35:24 +0100 | [diff] [blame] | 290 | /* 2nd param is "uint32_t*" */ |
| 291 | int FAST_FUNC udhcp_str2nip(const char *str, void *arg); |
| 292 | /* 2nd param is "struct option_set**" */ |
Denys Vlasenko | ba4fbca | 2017-06-28 19:18:17 +0200 | [diff] [blame] | 293 | int FAST_FUNC udhcp_str2optset(const char *str, |
| 294 | void *arg, |
| 295 | const struct dhcp_optflag *optflags, |
| 296 | const char *option_strings); |
Denys Vlasenko | a8f6b99 | 2010-03-26 08:35:24 +0100 | [diff] [blame] | 297 | |
Denys Vlasenko | 4ee824f | 2017-07-03 01:22:13 +0200 | [diff] [blame] | 298 | #if ENABLE_UDHCPC || ENABLE_UDHCPD |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 299 | void udhcp_init_header(struct dhcp_packet *packet, char type) FAST_FUNC; |
Denys Vlasenko | 4ee824f | 2017-07-03 01:22:13 +0200 | [diff] [blame] | 300 | #endif |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 301 | |
| 302 | int udhcp_recv_kernel_packet(struct dhcp_packet *packet, int fd) FAST_FUNC; |
| 303 | |
| 304 | int udhcp_send_raw_packet(struct dhcp_packet *dhcp_pkt, |
Denys Vlasenko | e58c6e2 | 2010-05-30 23:43:35 +0200 | [diff] [blame] | 305 | uint32_t source_nip, int source_port, |
| 306 | uint32_t dest_nip, int dest_port, const uint8_t *dest_arp, |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 307 | int ifindex) FAST_FUNC; |
| 308 | |
| 309 | int udhcp_send_kernel_packet(struct dhcp_packet *dhcp_pkt, |
Denys Vlasenko | e58c6e2 | 2010-05-30 23:43:35 +0200 | [diff] [blame] | 310 | uint32_t source_nip, int source_port, |
Denys Vlasenko | a6a3ad3 | 2017-09-29 15:55:24 +0200 | [diff] [blame] | 311 | uint32_t dest_nip, int dest_port, |
| 312 | int send_flags |
| 313 | ) FAST_FUNC; |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 314 | |
| 315 | void udhcp_sp_setup(void) FAST_FUNC; |
Denys Vlasenko | 52a515d | 2017-02-16 23:25:44 +0100 | [diff] [blame] | 316 | void udhcp_sp_fd_set(struct pollfd *pfds, int extra_fd) FAST_FUNC; |
| 317 | int udhcp_sp_read(struct pollfd *pfds) FAST_FUNC; |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 318 | |
| 319 | int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *mac) FAST_FUNC; |
| 320 | |
| 321 | int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC; |
| 322 | |
| 323 | /* Returns 1 if no reply received */ |
| 324 | int arpping(uint32_t test_nip, |
| 325 | const uint8_t *safe_mac, |
| 326 | uint32_t from_ip, |
| 327 | uint8_t *from_mac, |
Michel Stam | 9f41271 | 2014-10-30 11:59:04 +0100 | [diff] [blame] | 328 | const char *interface, |
| 329 | unsigned timeo) FAST_FUNC; |
Denys Vlasenko | dde8bdc | 2010-03-22 14:29:13 +0100 | [diff] [blame] | 330 | |
Denys Vlasenko | a092a89 | 2011-11-16 20:17:12 +0100 | [diff] [blame] | 331 | /* note: ip is a pointer to an IPv6 in network order, possibly misaliged */ |
| 332 | int sprint_nip6(char *dest, /*const char *pre,*/ const uint8_t *ip) FAST_FUNC; |
| 333 | |
Denis Vlasenko | f81e8db | 2009-04-09 12:35:13 +0000 | [diff] [blame] | 334 | POP_SAVED_FUNCTION_VISIBILITY |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 335 | |
Mike Frysinger | 7031f62 | 2006-05-08 03:20:50 +0000 | [diff] [blame] | 336 | #endif |