Linux 核心--16.Linux数据结构(15) of a persistent failure not just 'timed out' */ unsigned char protocol; volatile unsigned char state; unsigned char ack_backlog; unsigned char max_ack_backlog; unsigned char priority; unsigned char debug; int rcVBuf; int sndbuf; unsigned short type; unsigned char localroute; /* Route locally only */ /* * This is where all the private (optional) areas that don't * overlap will eventually live. */ union { struct unix_opt af_unix; #if defined(CONFIG_ATALK) defined(CONFIG_ATALK_MODULE) struct atalk_sock af_at; #endif #if defined(CONFIG_IPX) defined(CONFIG_IPX_MODULE) struct ipx_opt af_ipx; #endif #ifdef CONFIG_INET struct inet_packet_opt af_packet; #ifdef CONFIG_NUTCP struct tcp_opt af_tcp; #endif #endif } protinfo; /* * IP 'private area' */ int ip_ttl; /* TTL setting */ int ip_tos; /* TOS */ struct tcphdr dummy_th; struct timer_list keepalive_timer; /* TCP keepalive hack */ struct timer_list retransmit_timer; /* TCP retransmit timer */ struct timer_list delack_timer; /* TCP delayed ack timer */ int ip_xmit_timeout; /* Why the timeout is running */ struct rtable *ip_route_cache; /* Cached output route */ unsigned char ip_hdrincl; /* Include headers ? */ #ifdef CONFIG_IP_MULTICAST
