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Annotation of embedaddon/dhcdrop/src/net_functions.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * net_functions.h
                      3:  *
                      4:  *  Created on: 30.07.2009
                      5:  *      Author: Chebotarev Roman
                      6:  */
                      7: 
                      8: #ifndef NET_FUNCTIONS_H_
                      9: #define NET_FUNCTIONS_H_
                     10: 
                     11: #include "net.h"
                     12: 
                     13: enum packet_types
                     14: {
                     15:        dhcp_packet,
                     16:        arp_packet
                     17: };
                     18: 
                     19: /* Return pcap network device if success. Otherwise - exit from programm. */
                     20: pcap_t * get_device(const struct config_params * params);
                     21: 
                     22: /* Calculate CRC for data in 'buffer'. Return checksumm. */
                     23: uint16_t rs_crc(const unsigned short *buffer, int length);
                     24: 
                     25: /* Create ARP header */
                     26: void assemble_net_header_arp(struct arp_packet_net_header * net_header,
                     27:                const uint8_t * ether_src,
                     28:                uint16_t op_code);
                     29: 
                     30: /* Create network header - ethernet + IP + UDP. Store in 'header'. */
                     31: void assemble_net_header_dhcp
                     32:     (
                     33:         struct dhcp_packet_net_header * header,                /* Can't be NULL */
                     34:                const int data_len,                                             /* Length of UDP data */
                     35:         const struct config_params * params,   /* Can't be NULL */
                     36:         const uint8_t * ether_src,                             /* Source ethernet address. Binary format. Can't be NULL */
                     37:         const uint32_t dst_ip,                                 /* If zero - using broadcast. */
                     38:         const uint32_t src_ip
                     39:         );
                     40: 
                     41: /* Send packet to network. 'data_len' - only UDP data, exclude network headers */
                     42: int send_packet(pcap_t* descr,                         /* Can't be NULL */
                     43:                enum packet_types packet_type,  /* Type of sended packet. Se 'enum packet_types' in dhcdrop_types.h */
                     44:                const uint8_t *snd_data,                /* UDP payload. Can't be NULL */
                     45:                const int data_len,                             /* Payload data length */
                     46:                const struct config_params * params,    /* May be NULL */
                     47:                const uint8_t * ether_src,      /* Source ethernet address. Can't be NULL */
                     48:                const uint32_t dst_ip);
                     49: 
                     50: #ifdef  _WIN32
                     51: void CALLBACK timeout(UINT uTimerID, UINT uMsg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2);
                     52: #else
                     53: void timeout(int signal);
                     54: #endif
                     55: 
                     56: #endif /* NET_FUNCTIONS_H_ */