struct sock_common — minimal network layer representation of sockets
struct sock_common { unsigned short skc_family; volatile unsigned char skc_state; unsigned char skc_reuse; int skc_bound_dev_if; struct hlist_node skc_node; struct hlist_node skc_bind_node; atomic_t skc_refcnt; unsigned int skc_hash; struct proto * skc_prot; #ifdef CONFIG_NET_NS struct net * skc_net; #endif };
network address family
Connection state
SO_REUSEADDR
setting
bound device index if != 0
main hash linkage for various protocol lookup tables
bind hash linkage for various protocol lookup tables
reference count
hash value used with various protocol lookup tables
protocol handlers inside a network family
reference to the network namespace of this socket