linuxkernelTCP/IP协议栈

list_head ptype_base[16];list_head ptype_all;

struct inet_protoswinetsw_array[]

sock_sendmsgsock-ops-sendmsginet_stream_ops.sendmsginet_sendmsgtcp_prot.sendmsgtcp_sendmsg

dev_add_pack

struct inet_protosw {\tstruct list_head list;\tunsigned short\t type;\tunsigned short\t protocol; \tstruct proto\t *prot;\tconst struct proto_ops *ops;\tchar no_check; \tunsigned char\t flags; };

struct net_proto_family net_families[]

struct packet_typearp_packet_type(ETH_P_ARP 0806)

inet_register_protosw

af_inet.c

ip_rcv_finish

struct inet_protosw inetsw_array

inetsw[SOCK_STREAM] inetsw_array[0]------------------------------------------struct socket *sock{ .ops=inet_stream_ops .sk=sk_alloc(); { .sk_prot=tcp_proto .sk_socket=sock; }}

inet_stream_ops

proto_list

sock_register

list_head inetsw[];[protosw-type]

dev.c

实际上让 proto_ops调用prot

inet_add_protocol

struct net_protocol inet_protos[]

struct net_prot_family inet_family_ops

IPPROTO_**要接收的协议包

struct prototcp_prot [tcp_ipv4.c]udp_prot [udp.c]raw_prot [raw.c]

include/net/sock.hstruct sock {\tstruct sock_common\t__sk_common { \t\tunsigned short\t\tskc_family;\t\tstruct proto\t\t*skc_prot;\t\tstruct net\t \t*skc_net;\t}struct sk_buff_head\tsk_receive_queue;\tsk_buff_head\tsk_write_queue;}

tcp.c/tcp_v4.ctcp_pushtcp_output.ctcp_transmit_skb

所有的协议:如arp等

ip_finish_output

prot_register

struct packet_typeip_packet_typeETH_P_IP 0x0800