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"Robert P. J. Day"63fc1a92006-07-02 19:47:05 +00001/* vi: set sw=4 ts=4: */
Denys Vlasenko385b4562010-03-26 10:09:34 +01002/*
Mike Frysinger7031f622006-05-08 03:20:50 +00003 * Russ Dill <Russ.Dill@asu.edu> September 2001
4 * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
5 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +02006 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Mike Frysinger7031f622006-05-08 03:20:50 +00007 */
Denis Vlasenkof81e8db2009-04-09 12:35:13 +00008#ifndef UDHCP_COMMON_H
9#define UDHCP_COMMON_H 1
Mike Frysinger7031f622006-05-08 03:20:50 +000010
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000011#include "libbb.h"
Denys Vlasenkoe6a2f4c2016-04-21 16:26:30 +020012#include "common_bufsiz.h"
Denis Vlasenko98636eb2008-05-09 17:59:34 +000013#include <netinet/udp.h>
14#include <netinet/ip.h>
15
Denis Vlasenkof81e8db2009-04-09 12:35:13 +000016PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000017
Denys Vlasenko5cfb8182012-07-26 12:58:41 +020018extern const uint8_t MAC_BCAST_ADDR[6] ALIGN2; /* six all-ones */
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000019
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +010020
21/*** DHCP packet ***/
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000022
Denys Vlasenkoc7dc79e2010-03-21 06:15:28 +010023/* DHCP protocol. See RFC 2131 */
24#define DHCP_MAGIC 0x63825363
Denys Vlasenkoc7dc79e2010-03-21 06:15:28 +010025#define DHCP_OPTIONS_BUFSIZE 308
Denys Vlasenkoc7dc79e2010-03-21 06:15:28 +010026#define BOOTREQUEST 1
27#define BOOTREPLY 2
Denis Vlasenko72e76042007-11-25 03:15:24 +000028
Denys Vlasenko31af3d52009-06-17 11:57:09 +020029//TODO: rename ciaddr/yiaddr/chaddr
30struct dhcp_packet {
Denys Vlasenkoc7dc79e2010-03-21 06:15:28 +010031 uint8_t op; /* BOOTREQUEST or BOOTREPLY */
Denis Vlasenko739e30f2008-09-26 23:45:20 +000032 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 Vlasenko56f2d062009-06-16 10:25:35 +020041 /* IP address of next server to use in bootstrap, returned in DHCPOFFER, DHCPACK by server */
42 uint32_t siaddr_nip;
Denys Vlasenko990a6172009-06-16 10:23:55 +020043 uint32_t gateway_nip; /* relay agent IP address */
Denys Vlasenko56f2d062009-06-16 10:25:35 +020044 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 Vlasenko72e76042007-11-25 03:15:24 +000048 uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +000049} PACKED;
Denys Vlasenkoe5ce91b2010-03-21 00:43:11 +010050#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 Vlasenko5a3395b2006-11-18 19:51:32 +000054
Denys Vlasenko31af3d52009-06-17 11:57:09 +020055struct ip_udp_dhcp_packet {
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000056 struct iphdr ip;
57 struct udphdr udp;
Denys Vlasenko31af3d52009-06-17 11:57:09 +020058 struct dhcp_packet data;
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +000059} PACKED;
Denis Vlasenko6884f662007-11-23 00:08:54 +000060
Denys Vlasenkob7d19cc2010-05-30 23:41:23 +020061struct udp_dhcp_packet {
62 struct udphdr udp;
63 struct dhcp_packet data;
64} PACKED;
65
66enum {
Denys Vlasenko2c3b71a2010-10-20 18:04:36 +020067 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 Vlasenkob7d19cc2010-05-30 23:41:23 +020069 DHCP_SIZE = sizeof(struct dhcp_packet) - CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS,
70};
71
Denis Vlasenko6884f662007-11-23 00:08:54 +000072/* Let's see whether compiler understood us right */
Denys Vlasenko31af3d52009-06-17 11:57:09 +020073struct BUG_bad_sizeof_struct_ip_udp_dhcp_packet {
Denys Vlasenko2c3b71a2010-10-20 18:04:36 +020074 char c[IP_UDP_DHCP_SIZE == 576 ? 1 : -1];
Denis Vlasenko5a3395b2006-11-18 19:51:32 +000075};
76
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +010077
78/*** Options ***/
79
80enum {
81 OPTION_IP = 1,
82 OPTION_IP_PAIR,
83 OPTION_STRING,
Denys Vlasenko7280d202011-12-08 16:41:05 +010084 /* Opts of STRING_HOST type will be sanitized before they are passed
85 * to udhcpc script's environment: */
86 OPTION_STRING_HOST,
Denys Vlasenkoa8f6b992010-03-26 08:35:24 +010087// OPTION_BOOLEAN,
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +010088 OPTION_U8,
89 OPTION_U16,
Denys Vlasenkoa8f6b992010-03-26 08:35:24 +010090// OPTION_S16,
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +010091 OPTION_U32,
92 OPTION_S32,
Denys Vlasenko4f3aa512010-04-04 15:31:12 +020093 OPTION_BIN,
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +010094 OPTION_STATIC_ROUTES,
Denys Vlasenko1f56e512011-10-19 22:40:35 +020095 OPTION_6RD,
Denys Vlasenkoba4fbca2017-06-28 19:18:17 +020096#if ENABLE_FEATURE_UDHCP_RFC3397 || ENABLE_FEATURE_UDHCPC6_RFC3646 || ENABLE_FEATURE_UDHCPC6_RFC4704
Denys Vlasenko4f3aa512010-04-04 15:31:12 +020097 OPTION_DNS_STRING, /* RFC1035 compressed domain name list */
Denys Vlasenkoba4fbca2017-06-28 19:18:17 +020098#endif
99#if ENABLE_FEATURE_UDHCP_RFC3397
Denys Vlasenko4f3aa512010-04-04 15:31:12 +0200100 OPTION_SIP_SERVERS,
101#endif
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100102
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 Vlasenkof4613852011-10-20 08:54:16 +0200113 * uncommented ones have special cases (grep for them to see).
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100114 */
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 Grishenko7d3a48a2010-09-26 00:15:12 +0200133//#define DHCP_ROUTES 0x21
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100134//#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 Vlasenko243ddcb2010-04-03 17:34:52 +0200153//#define DHCP_SIP_SERVERS 0x78 /* RFC 3361. flag byte, then: 0: domain names, 1: IP addrs */
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100154//#define DHCP_STATIC_ROUTES 0x79 /* RFC 3442. (mask,ip,router) tuples */
Jeremy Kerrd3092c92013-11-12 11:18:26 +0100155//#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 Kerrb8ffd112014-07-15 11:03:17 +0800158//#define DHCP_PXE_PATH_PREFIX 0xd2 /* RFC 5071 Configuration File */
Vladislav Grishenko7d3a48a2010-09-26 00:15:12 +0200159//#define DHCP_MS_STATIC_ROUTES 0xf9 /* Microsoft's pre-RFC 3442 code for 0x79? */
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100160//#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 Vlasenkoc03602b2010-04-04 15:28:49 +0200184struct dhcp_optflag {
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100185 uint8_t flags;
186 uint8_t code;
187};
188
Denys Vlasenko7e6add12010-03-25 20:32:38 +0100189struct option_set {
190 uint8_t *data;
191 struct option_set *next;
192};
193
Denys Vlasenkoba4fbca2017-06-28 19:18:17 +0200194#if ENABLE_UDHCPC || ENABLE_UDHCPD
Denys Vlasenkoc03602b2010-04-04 15:28:49 +0200195extern const struct dhcp_optflag dhcp_optflags[];
Michael Tokarev32f774c2012-07-24 15:56:37 +0200196extern const char dhcp_option_strings[] ALIGN1;
Denys Vlasenkoba4fbca2017-06-28 19:18:17 +0200197#endif
Michael Tokarev32f774c2012-07-24 15:56:37 +0200198extern const uint8_t dhcp_option_lengths[] ALIGN1;
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100199
Denys Vlasenkoba4fbca2017-06-28 19:18:17 +0200200unsigned FAST_FUNC udhcp_option_idx(const char *name, const char *option_strings);
Denys Vlasenko9107b632010-03-27 23:23:41 +0100201
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100202uint8_t *udhcp_get_option(struct dhcp_packet *packet, int code) FAST_FUNC;
203int udhcp_end_option(uint8_t *optionptr) FAST_FUNC;
Denys Vlasenko7724c762010-03-26 09:32:09 +0100204void udhcp_add_binary_option(struct dhcp_packet *packet, uint8_t *addopt) FAST_FUNC;
Denys Vlasenkoba4fbca2017-06-28 19:18:17 +0200205#if ENABLE_UDHCPC || ENABLE_UDHCPD
Denys Vlasenko7724c762010-03-26 09:32:09 +0100206void udhcp_add_simple_option(struct dhcp_packet *packet, uint8_t code, uint32_t data) FAST_FUNC;
Denys Vlasenkoba4fbca2017-06-28 19:18:17 +0200207#endif
208#if ENABLE_FEATURE_UDHCP_RFC3397 || ENABLE_FEATURE_UDHCPC6_RFC3646 || ENABLE_FEATURE_UDHCPC6_RFC4704
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100209char *dname_dec(const uint8_t *cstr, int clen, const char *pre) FAST_FUNC;
210uint8_t *dname_enc(const uint8_t *cstr, int clen, const char *src, int *retlen) FAST_FUNC;
211#endif
Denys Vlasenko7724c762010-03-26 09:32:09 +0100212struct option_set *udhcp_find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC;
Denys Vlasenko7e6add12010-03-25 20:32:38 +0100213
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100214
Denys Vlasenkoc7dc79e2010-03-21 06:15:28 +0100215// RFC 2131 Table 5: Fields and options used by DHCP clients
216//
Denys Vlasenko37a658c2010-03-23 15:43:08 +0100217// Fields 'hops', 'yiaddr', 'siaddr', 'giaddr' are always zero
Denys Vlasenkoc7dc79e2010-03-21 06:15:28 +0100218//
Denys Vlasenko6b616292010-03-22 15:22:14 +0100219// 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 Vlasenkoc7dc79e2010-03-21 06:15:28 +0100259
260
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100261/*** Logging ***/
Mike Frysinger7031f622006-05-08 03:20:50 +0000262
Denys Vlasenkoac906fa2009-06-17 11:54:52 +0200263#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
Leonid Lisovskiy6c9c0a12011-10-18 00:35:47 +0200264# define IF_UDHCP_VERBOSE(...) __VA_ARGS__
Denys Vlasenko6947d2c2009-06-17 13:24:03 +0200265extern unsigned dhcp_verbose;
Denys Vlasenko8f2e99c2016-03-30 18:41:23 +0200266# define log1(...) do { if (dhcp_verbose >= 1) bb_error_msg(__VA_ARGS__); } while (0)
Denys Vlasenkoac906fa2009-06-17 11:54:52 +0200267# if CONFIG_UDHCP_DEBUG >= 2
Denys Vlasenko31af3d52009-06-17 11:57:09 +0200268void udhcp_dump_packet(struct dhcp_packet *packet) FAST_FUNC;
Denys Vlasenko8f2e99c2016-03-30 18:41:23 +0200269# define log2(...) do { if (dhcp_verbose >= 2) bb_error_msg(__VA_ARGS__); } while (0)
Denys Vlasenkoac906fa2009-06-17 11:54:52 +0200270# else
271# define udhcp_dump_packet(...) ((void)0)
272# define log2(...) ((void)0)
273# endif
Denys Vlasenko31af3d52009-06-17 11:57:09 +0200274# if CONFIG_UDHCP_DEBUG >= 3
Denys Vlasenko8f2e99c2016-03-30 18:41:23 +0200275# define log3(...) do { if (dhcp_verbose >= 3) bb_error_msg(__VA_ARGS__); } while (0)
Denys Vlasenko31af3d52009-06-17 11:57:09 +0200276# else
277# define log3(...) ((void)0)
278# endif
Mike Frysinger7031f622006-05-08 03:20:50 +0000279#else
Leonid Lisovskiy6c9c0a12011-10-18 00:35:47 +0200280# define IF_UDHCP_VERBOSE(...)
Denys Vlasenkoac906fa2009-06-17 11:54:52 +0200281# define udhcp_dump_packet(...) ((void)0)
282# define log1(...) ((void)0)
283# define log2(...) ((void)0)
Denys Vlasenko31af3d52009-06-17 11:57:09 +0200284# define log3(...) ((void)0)
Mike Frysinger7031f622006-05-08 03:20:50 +0000285#endif
286
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100287
288/*** Other shared functions ***/
289
Denys Vlasenkoa8f6b992010-03-26 08:35:24 +0100290/* 2nd param is "uint32_t*" */
291int FAST_FUNC udhcp_str2nip(const char *str, void *arg);
292/* 2nd param is "struct option_set**" */
Denys Vlasenkoba4fbca2017-06-28 19:18:17 +0200293int FAST_FUNC udhcp_str2optset(const char *str,
294 void *arg,
295 const struct dhcp_optflag *optflags,
296 const char *option_strings);
Denys Vlasenkoa8f6b992010-03-26 08:35:24 +0100297
Denys Vlasenko4ee824f2017-07-03 01:22:13 +0200298#if ENABLE_UDHCPC || ENABLE_UDHCPD
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100299void udhcp_init_header(struct dhcp_packet *packet, char type) FAST_FUNC;
Denys Vlasenko4ee824f2017-07-03 01:22:13 +0200300#endif
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100301
302int udhcp_recv_kernel_packet(struct dhcp_packet *packet, int fd) FAST_FUNC;
303
304int udhcp_send_raw_packet(struct dhcp_packet *dhcp_pkt,
Denys Vlasenkoe58c6e22010-05-30 23:43:35 +0200305 uint32_t source_nip, int source_port,
306 uint32_t dest_nip, int dest_port, const uint8_t *dest_arp,
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100307 int ifindex) FAST_FUNC;
308
309int udhcp_send_kernel_packet(struct dhcp_packet *dhcp_pkt,
Denys Vlasenkoe58c6e22010-05-30 23:43:35 +0200310 uint32_t source_nip, int source_port,
311 uint32_t dest_nip, int dest_port) FAST_FUNC;
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100312
313void udhcp_sp_setup(void) FAST_FUNC;
Denys Vlasenko52a515d2017-02-16 23:25:44 +0100314void udhcp_sp_fd_set(struct pollfd *pfds, int extra_fd) FAST_FUNC;
315int udhcp_sp_read(struct pollfd *pfds) FAST_FUNC;
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100316
317int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *mac) FAST_FUNC;
318
319int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC;
320
321/* Returns 1 if no reply received */
322int arpping(uint32_t test_nip,
323 const uint8_t *safe_mac,
324 uint32_t from_ip,
325 uint8_t *from_mac,
Michel Stam9f412712014-10-30 11:59:04 +0100326 const char *interface,
327 unsigned timeo) FAST_FUNC;
Denys Vlasenkodde8bdc2010-03-22 14:29:13 +0100328
Denys Vlasenkoa092a892011-11-16 20:17:12 +0100329/* note: ip is a pointer to an IPv6 in network order, possibly misaliged */
330int sprint_nip6(char *dest, /*const char *pre,*/ const uint8_t *ip) FAST_FUNC;
331
Denis Vlasenkof81e8db2009-04-09 12:35:13 +0000332POP_SAVED_FUNCTION_VISIBILITY
Denis Vlasenko98636eb2008-05-09 17:59:34 +0000333
Mike Frysinger7031f622006-05-08 03:20:50 +0000334#endif