getsockopt TCP UDP

Get a specific option value on a specific TCP socket. See function NetSock_OptGet for more information.

Files

net_bsd.h/net_bsd.c

Prototype

          int getsockopt(int         sock_id,
                         int         level,
                         int         opt_name,
                         void       *p_opt_val,
                         sock_len_t *p_opt_len);

Arguments

sock_id

This is the socket ID returned by NetSock_Open()/socket() when the socket was created or by NetSock_Accept()/accept() when a connection was accepted.

level

Protocol level from which to retrieve the socket option.

opt_name

Socket option to set the value.

p_opt_val

Pointer to the socket option value to set.

p_opt_len

Pointer to the socket option value to get.

Returned Value

0, if successful;

-1, otherwise.

Required Configuration

None.

Notes / Warnings

The supported options are:

Protocol level SOL_SOCKET:
- SO_TYPE
- SO_KEEPALIVE
- SO_ACCEPTCONN
- SO_SNDBUF / SO_RCVBUF
- SO_SNDTIMEO / SO_RCVTIMEO
Protocol level IPPROTO_IP:
- IP_TOS
- IP_TTL
- IP_RECVIF
Protocol level IPPROTO_TCP:
- TCP_NODELAY
- TCP_KEEPCNT
- TCP_KEEPIDLE
- TCP_INTVL