WinPcap下的主要结构体和主要函数.doc

WinPCap中的主要结构体： struct pcap_if_t（称为网络设备结构，表示一个网络接口设备（如网卡））　结构体包含以下5个域（其结构体与pcap_if相同，可以用pcap_if_t代替pcap_if）： struct pcap_if { struct pcap_if *next; char *name; /* name to hand to pcap_open_live() */ char *description; /* textual description of interface, or NULL */ struct pcap_addr *addresses; bpf_u_int32 flags; /* PCAP_IF_ interface flags */ }; Struct pcap_addr : Representation of an interface address　 (表示接口地址) Struct pcap_addr { struct pcap_addr *?next：if not NULL, a pointer to the next element in the list;　 NULL for the last element of the list （指向下一个元素的指针）struct sockaddr *?addr ?a pointer to a struct sockaddr containing an address struct sockaddr *?netmask ?if not NULL, a pointer to a struct sockaddr that contains the netmask corresponding to the address pointed to by addr. struct sockaddr *?broadaddr ?if not NULL, a pointer to a struct sockaddr that contains the broadcast address corre? sponding to the address pointed to by addr; may be null if the interface doesnt support broadcasts struct sockaddr *?dstaddr ?if not NULL, a pointer to a struct sockaddr that contains the destination address corre? sponding to the address pointed to by addr; may be null if the interface isnt a point- to-point interface } ２．pcap_if Item in a list of interfaces, used by pcap_findalldevs(). （接口设备列表的一项（一个设备，比如一个网卡）） Definition at line 148 of file incs/pcap.h.　 Struct pcap_if { struct pcap_if * next if not NULL, a pointer to the next element in the list; NULL for the last element of the list char * name a pointer to a string giving a name for the device to pass to pcap_open_live() char * description if not NULL, a pointer to a string giving a human-readable description of the device struct pcap_addr * addresses a pointer to the first element of a list of addresses for the interface u_int flags PCAP_IF_ interface flags. Currently the only possible flag is PCAP_IF_LOOPBACK, that is set if the interface is a loopback interface. } 2. 结构体pcap_t Descriptor of