Information

Socket Error Codes

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Description

When the a socket's Error event fires, the error code returned varies by platform.

Linux and macOS

Error Code	Description
1	Operation not permitted
2	No such file or directory
3	No such process
4	Interrupted system call
5	Input/output error
6	Device not configured
7	Argument list too long
8	Exec format error
9	Bad file descriptor
10	No child processes
11	Resource temporarily unavailable
12	Cannot allocate memory
13	Permission denied
14	Bad address
15	Block device required
16	Device busy
17	File exists
18	Cross-device link
19	Operation not supported by device
20	Not a directory
21	Is a directory
22	Invalid argument
23	Too many open files in system
24	Too many open files
25	Inappropriate ioctl for device
26	Text file busy
27	File too large
28	No space left on device
29	Illegal seek
30	Read-only file system
31	Too many links
32	Broken pipe
33	Numerical argument out of domain
34	Result too large
35	Operation would block
36	Operation now in progress
37	Operation already in progress
38	Socket operation on non-socket
39	Destination address required
40	Message too long
41	Protocol wrong type for socket
42	Protocol not available
43	Protocol not supported
44	Socket type not supported
45	Operation not supported
46	Protocol family not supported
47	Address family not supported by protocol family
48	Address already in use
49	Can't assign requested address
50	Network is down
51	Network is unreachable
52	Network dropped connection on reset
53	Software caused connection abort
54	Connection reset by peer
55	No buffer space available
56	Socket is already connected
57	Socket is not connected
58	Can't send after socket shutdown
59	Too many references: can't splice
60	Operation timed out
61	Connection refused
62	Too many levels of symbolic links
63	File name too long
64	Host is down
65	No route to host
66	Directory not empty
67	Too many processes
68	Too many users
69	Disc quota exceeded
70	Stale NFS file handle
71	Too many levels of remote in path
72	RPC struct is bad
73	RPC version wrong
74	RPC prog. not avail
75	Program version wrong
76	Bad procedure for program
77	No locks available
78	Function not implemented
79	Inappropriate file type or format
80	Authentication error
81	Need authenticator
82	Device power is off
83	Device error, e.g. paper out
84	Value too large to be stored in data type
85	Bad executable
86	Bad CPU type in executable
87	Shared library version mismatch
88	Malformed Macho file
89	Operation canceled
90	Identifier removed
91	No message of desired type
92	Illegal byte sequence
93	Must be equal largest errno

Windows

Windows socket error codes can be found here.