forked from saravana815/dhtest
-
Notifications
You must be signed in to change notification settings - Fork 0
/
headers.h
349 lines (317 loc) · 10.9 KB
/
headers.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
/*
* File - dhcp-headers.h
* dhcp-headers.h - header structure for dhcp packets
*/
#ifndef HEADERS_H
#include<sys/types.h>
#include<netinet/in.h>
#define HEADERS_H
/*
* Functions used in functions.c
*/
int open_socket(); /* Opens PF_PACKET socket*/
int close_socket(); /* Close PF_PACKET socket */
int set_promisc();
int clear_promisc();
int send_packet(int pkt_type); /* Sends DHCP packet socket*/
int recv_packet(int pkt_type); /* Receives DHCP packet on socket*/
int reset_dhopt_size(); /* Resets the dhopt_size to zero */
int set_rand_dhcp_xid(); /* Sets a random DHCP xid */
int build_option53(int msg_type); /* Option53: MSGTYPE. Builds option53*/
int build_option55(); /* Requested parameters list */
int build_option54(); /* Builds server identifier on DHCP request */
int build_option50(); /* Option50: Rqstd IP. Builds option50*/
int build_option51(); /* Option51: Rqstd lease time. Builds option51*/
int build_option60_vci(); /* Vendor class identifier */
int build_option12_hostname(); /* Hostname */
int build_option81_fqdn(); /* FQDN */
int build_optioneof(); /* End of option */
int build_dhpacket(int pkt_type); /* Build DHCP disc, req packets */
int build_packet(int pkt_type); /* Builds ARP and ICMP reply packets */
int print_buff(u_int8_t *buff, int size);/* Debug routine */
int map_all_layer_ptr(int pkt_type); /* maps all layer pointer on DHCP packet */
int check_packet(int pkt_type); /* Checks the packet for DHCP offer & ack */
int print_dhinfo(int pkt_type); /* Prints DHCP offer & ack informations */
int log_dhinfo(); /* Logs DHCP IP info to log file */
int get_dhinfo(); /* Reads log file for mac, ip, serv_ip info */
char *get_ip_str(u_int32_t ip); /* Convert in_addr to string */
u_int32_t get_interface_address(); /* Return the IP address of the interface. */
int set_serv_id_opt50(); /* Sets the server_ip and option50 ip */
/*
* Libnet defines header sizes for every builder function exported.
*/
#define ETHER_H 0x10 /* Ethernet header: 14 bytes */
#define ETHER_ADDR_LEN 0x6 /* Ethernet address len: 6 bytes */
#define IP_ADDR_LEN 0x4
#define VLAN_H 0x12 /* Ethernet header + vlan header*/
#define IP_H 0x20 /* IP header: 20 bytes */
#define UDP_H 0x8 /* UDP header: 8 bytes */
#define ICMP_H 0x8
#define ICMP_PAYLOAD 0x3c /* 60 bytes of ICMP payload */
#define DHCPV4_H 0xf0 /**< DHCP v4 header: 240 bytes */
#define ARP_H_LEN 0x08
/*
* ARP header
* Address Resolution Protocol
* Base header size: 8 bytes
*/
struct arp_hdr
{
u_int16_t ar_hrd; /* format of hardware address */
#define ARPHRD_NETROM 0 /* from KA9Q: NET/ROM pseudo */
#define ARPHRD_ETHER 1 /* Ethernet 10Mbps */
#define ARPHRD_EETHER 2 /* Experimental Ethernet */
#define ARPHRD_AX25 3 /* AX.25 Level 2 */
#define ARPHRD_PRONET 4 /* PROnet token ring */
#define ARPHRD_CHAOS 5 /* Chaosnet */
#define ARPHRD_IEEE802 6 /* IEEE 802.2 Ethernet/TR/TB */
#define ARPHRD_ARCNET 7 /* ARCnet */
#define ARPHRD_APPLETLK 8 /* APPLEtalk */
#define ARPHRD_LANSTAR 9 /* Lanstar */
#define ARPHRD_DLCI 15 /* Frame Relay DLCI */
#define ARPHRD_ATM 19 /* ATM */
#define ARPHRD_METRICOM 23 /* Metricom STRIP (new IANA id) */
#define ARPHRD_IPSEC 31 /* IPsec tunnel */
u_int16_t ar_pro; /* format of protocol address */
u_int8_t ar_hln; /* length of hardware address */
u_int8_t ar_pln; /* length of protocol addres */
u_int16_t ar_op; /* operation type */
#define ARPOP_REQUEST 1 /* req to resolve address */
#define ARPOP_REPLY 2 /* resp to previous request */
#define ARPOP_REVREQUEST 3 /* req protocol address given hardware */
#define ARPOP_REVREPLY 4 /* resp giving protocol address */
#define ARPOP_INVREQUEST 8 /* req to identify peer */
#define ARPOP_INVREPLY 9 /* resp identifying peer */
u_int8_t sender_mac[ETHER_ADDR_LEN];
union {
u_int8_t sender_ip[IP_ADDR_LEN];
u_int32_t sender_ip32;
};
u_int8_t target_mac[ETHER_ADDR_LEN];
union {
u_int8_t target_ip[IP_ADDR_LEN];
u_int32_t target_ip32;
};
};
/**
* IEEE 802.1Q (Virtual Local Area Network) VLAN header, static header
* size: 18 bytes
*/
struct vlan_eth_hdr
{
u_int8_t vlan_dhost[ETHER_ADDR_LEN]; /**< destination ethernet address */
u_int8_t vlan_shost[ETHER_ADDR_LEN]; /**< source ethernet address */
u_int16_t vlan_tpi; /**< tag protocol ID */
u_int16_t vlan_priority_c_vid; /**< priority | VLAN ID */
#define VLAN_PRIMASK 0x0007 /**< priority mask */
#define VLAN_CFIMASK 0x0001 /**< CFI mask */
#define VLAN_VIDMASK 0x0fff /**< vid mask */
u_int16_t vlan_len; /**< length or type (802.3 / Eth 2) */
};
/*
* IP header included from netinet/ip.h
*/
#include<netinet/ip.h>
/*
* ICMP header
* Internet Control Message Protocol
* Base header size: 4 bytes
*/
struct icmp_hdr
{
u_int8_t icmp_type; /* ICMP type */
#define ICMP_ECHOREPLY 0
#define ICMP_ECHO 8
u_int8_t icmp_code; /* ICMP code */
u_int16_t icmp_sum; /* ICMP Checksum */
u_int16_t id; /* ICMP id */
u_int16_t seq; /* ICMP sequence number */
};
/*
* UDP header included from netinet/udp.h
*/
#include<netinet/udp.h>
/*
* DHCP header
* Dynamic Host Configuration Protocol
* Static header size: f0 bytes
*/
struct dhcpv4_hdr
{
u_int8_t dhcp_opcode; /* opcode */
#define DHCP_REQUEST 0x1
#define DHCP_REPLY 0x2
u_int8_t dhcp_htype; /* hardware address type */
u_int8_t dhcp_hlen; /* hardware address length */
u_int8_t dhcp_hopcount; /* used by proxy servers */
u_int32_t dhcp_xid; /* transaction ID */
u_int16_t dhcp_secs; /* number of seconds since trying to bootstrap */
u_int16_t dhcp_flags; /* flags for DHCP, unused for BOOTP */
u_int32_t dhcp_cip; /* client's IP */
u_int32_t dhcp_yip; /* your IP */
u_int32_t dhcp_sip; /* server's IP */
u_int32_t dhcp_gip; /* gateway IP */
u_int8_t dhcp_chaddr[16]; /* client hardware address */
u_int8_t dhcp_sname[64]; /* server host name */
u_int8_t dhcp_file[128]; /* boot file name */
u_int32_t dhcp_magic; /* BOOTP magic header */
#define DHCP_MAGIC 0x63825363
#define BOOTP_MIN_LEN 0x12c
#define DHCP_PAD 0x00
#define DHCP_SUBNETMASK 0x01
#define DHCP_TIMEOFFSET 0x02
#define DHCP_ROUTER 0x03
#define DHCP_TIMESERVER 0x04
#define DHCP_NAMESERVER 0x05
#define DHCP_DNS 0x06
#define DHCP_LOGSERV 0x07
#define DHCP_COOKIESERV 0x08
#define DHCP_LPRSERV 0x09
#define DHCP_IMPSERV 0x0a
#define DHCP_RESSERV 0x0b
#define DHCP_HOSTNAME 0x0c
#define DHCP_BOOTFILESIZE 0x0d
#define DHCP_DUMPFILE 0x0e
#define DHCP_DOMAINNAME 0x0f
#define DHCP_SWAPSERV 0x10
#define DHCP_ROOTPATH 0x11
#define DHCP_EXTENPATH 0x12
#define DHCP_IPFORWARD 0x13
#define DHCP_SRCROUTE 0x14
#define DHCP_POLICYFILTER 0x15
#define DHCP_MAXASMSIZE 0x16
#define DHCP_IPTTL 0x17
#define DHCP_MTUTIMEOUT 0x18
#define DHCP_MTUTABLE 0x19
#define DHCP_MTUSIZE 0x1a
#define DHCP_LOCALSUBNETS 0x1b
#define DHCP_BROADCASTADDR 0x1c
#define DHCP_DOMASKDISCOV 0x1d
#define DHCP_MASKSUPPLY 0x1e
#define DHCP_DOROUTEDISC 0x1f
#define DHCP_ROUTERSOLICIT 0x20
#define DHCP_STATICROUTE 0x21
#define DHCP_TRAILERENCAP 0x22
#define DHCP_ARPTIMEOUT 0x23
#define DHCP_ETHERENCAP 0x24
#define DHCP_TCPTTL 0x25
#define DHCP_TCPKEEPALIVE 0x26
#define DHCP_TCPALIVEGARBAGE 0x27
#define DHCP_NISDOMAIN 0x28
#define DHCP_NISSERVERS 0x29
#define DHCP_NISTIMESERV 0x2a
#define DHCP_VENDSPECIFIC 0x2b
#define DHCP_NBNS 0x2c
#define DHCP_NBDD 0x2d
#define DHCP_NBTCPIP 0x2e
#define DHCP_NBTCPSCOPE 0x2f
#define DHCP_XFONT 0x30
#define DHCP_XDISPLAYMGR 0x31
#define DHCP_REQUESTEDIP 0x32
#define DHCP_LEASETIME 0x33
#define DHCP_OPTIONOVERLOAD 0x34
#define DHCP_MESSAGETYPE 0x35
#define DHCP_SERVIDENT 0x36
#define DHCP_PARAMREQUEST 0x37
#define DHCP_MESSAGE 0x38
#define DHCP_MAXMSGSIZE 0x39
#define DHCP_RENEWTIME 0x3a
#define DHCP_REBINDTIME 0x3b
#define DHCP_CLASSID 0x3c
#define DHCP_CLIENTID 0x3d
#define DHCP_NISPLUSDOMAIN 0x40
#define DHCP_NISPLUSSERVERS 0x41
#define DHCP_MOBILEIPAGENT 0x44
#define DHCP_SMTPSERVER 0x45
#define DHCP_POP3SERVER 0x46
#define DHCP_NNTPSERVER 0x47
#define DHCP_WWWSERVER 0x48
#define DHCP_FINGERSERVER 0x49
#define DHCP_IRCSERVER 0x4a
#define DHCP_STSERVER 0x4b
#define DHCP_STDASERVER 0x4c
#define DHCP_FQDN 0x51
#define DHCP_END 0xff
#define DHCP_MSGDISCOVER 0x01
#define DHCP_MSGOFFER 0x02
#define DHCP_MSGREQUEST 0x03
#define DHCP_MSGDECLINE 0x04
#define DHCP_MSGACK 0x05
#define DHCP_MSGNACK 0x06
#define DHCP_MSGRELEASE 0x07
#define DHCP_MSGINFORM 0x08
};
#ifndef ETHERTYPE_IP
#define ETHERTYPE_IP 0x0800 /* IP protocol */
#endif
#ifndef ETHERTYPE_VLAN
#define ETHERTYPE_VLAN 0x8100 /* IEEE 802.1Q VLAN tagging */
#endif
#define ETHERTYPE_ARP 0x806
#define SOCKET_ERR -1
#define PACK_SEND_ERR -1
#define PACK_RECV_ERR -2
#define DHCP_OFFR_RCVD 1
#define DHCP_DISC_RESEND 2
#define UNKNOWN_PACKET 3
#define DHCP_ACK_RCVD 4
#define DHCP_REQ_RESEND 5
#define DHCP_NAK_RCVD 6
#define ERR_FILE_OPEN 7
#define ARP_ICMP_RCV 8
#define ARP_RCVD 9
#define ARP_MAP 10
#define ICMP_MAP 11
#define ICMP_RCVD 12
#define ARP_SEND 13
#define ICMP_SEND 14
#define LISTEN_TIMEOUT 15
/*
* FQDN options flags
*/
#define FQDN_N_FLAG 0x08
#define FQDN_E_FLAG 0x04
#define FQDN_O_FLAG 0x02
#define FQDN_S_FLAG 0x01a
/*
* Minimum DHCP packet size
*/
#define MINIMUM_PACKET_SIZE 300
//Defined in dhtest.c
extern int iface;
extern u_int16_t vlan;
extern u_int8_t l3_tos;
extern u_int16_t l2_hdr_size;
extern u_int16_t l3_hdr_size;
extern u_int16_t l4_hdr_size;
extern u_int16_t fqdn_n;
extern u_int16_t fqdn_s;
extern u_int32_t dhcp_xid;
extern int bcast_flag;
extern int timeout;
extern u_int8_t padding_flag;
extern const char *vci_buff;
extern const char *hostname_buff;
extern const char *fqdn_buff;
extern u_int32_t option51_lease_time;
extern u_int32_t port;
extern u_int8_t unicast_flag;
extern u_int8_t nagios_flag;
extern char *giaddr;
extern char *server_addr;
extern struct dhcpv4_hdr *dhcph_g;
extern u_int8_t *dhopt_pointer_g;
extern u_char dhmac[ETHER_ADDR_LEN];
extern u_char dmac[ETHER_ADDR_LEN];
extern char dhmac_fname[20];
extern char *iface_name;
extern char ip_str[128];
extern u_int32_t server_id, option50_ip;
extern u_int8_t dhcp_release_flag;
extern u_int32_t unicast_ip_address;
extern u_int32_t ip_address;
extern u_char ip_listen_flag;
extern struct timeval tval_listen;
extern u_int32_t listen_timeout;
#endif /* __HEADERS_H */
/* EOF */