All Linux network error codes

Fri May 5, 2023

Certainly! Here’s a table listing some of the common Linux syscall errors related to networking:

Error Number	Error Name	Description
101	EHOSTUNREACH	No route to the host
113	EHOSTDOWN	Host is down
110	ETIMEDOUT	Connection timed out
111	ECONNREFUSED	Connection refused by the remote host
112	ECONNRESET	Connection reset by peer
114	EALREADY	Operation already in progress
115	EINPROGRESS	Operation now in progress
116	ESTALE	Stale file handle (NFS)
121	EREMOTEIO	Remote I/O error (NFS)
124	EADDRNOTAVAIL	Cannot assign requested address
125	ENETUNREACH	Network is unreachable
126	ENETRESET	Network dropped connection because of reset
127	ECONNABORTED	Connection aborted by the software
128	EPIPE	Broken pipe
129	EOPNOTSUPP	Operation not supported on transport endpoint
130	EADDRINUSE	Address already in use
131	EAFNOSUPPORT	Address family not supported by protocol
132	EWOULDBLOCK	Operation would block
133	EISCONN	Socket is already connected
134	ECONNRESET	Connection reset by the peer

Please note that this is not an exhaustive list, and there are additional syscall errors that can occur in networking scenarios. The error numbers and names provided here are some of the commonly encountered ones.