send.2 (2010 09)

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send(2) send(2)

[EACCES] Process doing a

send() of a broadcast packet does not have broadcast capa-

bility enabled for the socket. Use

setsockopt()

to enable broadcast capa-

bility.

[EAFNOSUPPORT] The speciﬁed address is not a valid address for the address family of this

socket.

[EAGAIN] Nonblocking I/O is enabled using the

O_NONBLOCK ﬂag with fcntl(), and

the requested operation would block, or the socket has an error that was set

asynchronously. An asynchronous error can be caused by a gateway failing to

forward a datagram from this socket because the datagram exceeds the MTU

of the next-hop network and the "Don’t Fragment" (DF) bit in the datagram is

set. (See

SO_PMTU in getsockopt (2)).

[EBADF] s is not a valid ﬁle descriptor.

[ECONNRESET] A connection was forcibly closed by a peer.

[EDESTADDRREQ] The to parameter needs to specify a destination address for the message. This

is also given if the speciﬁed address contains unspeciﬁed ﬁelds (see inet (7F)).

[EFAULT] An invalid pointer was speciﬁed in the msg or to parameter, or in the

msghdr

structure.

[EINTR] The operation was interrupted by a signal before any data was sent. (If some

data was sent,

send() returns the number of bytes sent before the signal,

and [EINTR] is not set).

[EINVAL] The len or tolen parameter, or a length in the

msghdr structure is invalid. A

sendto() system call was issued on an X.25 socket, or the connection is in

its reset sequence and cannot accept data.

[EIO] A timeout occurred.

[EISCONN] An address was speciﬁed by to for a SOCK_DGRAM socket which is already

connected.

[EMSGSIZE] A length in the

msghdr structure is invalid. The socket requires that mes-

sages be sent atomically, and the size of the message to be sent made this

impossible.

SOCK_DGRAM/AF_INET or SOCK_STREAM/AF_CCITT: The message size

exceeded the outbound buffer size.

[ENETDOWN] The interface used for the speciﬁed address is "down" (see ifconﬁg(1M)), no

interface for the speciﬁed address can be found (SO_DONTROUTE socket

option in use), or the X.25 Level 2 is down.

[EHOSTUNREACH] The destination host is not reachable.

[ENETUNREACH] The destination network is not reachable. Some of the possible causes for this

error are:

(LAN) All encapsulations (for example, Ethernet, IEEE) have been turned off

(see also ifconﬁg(1M)).

(X.25) The X.25 Level 2 is down. The X.25 link layer is not working (wires

might be broken, connections are loose on the interface hoods at the modem,

the modem failed, the packet switch at the remote end lost power or failed for

some reason, or electrical noise interfered with the line for an extremely long

period of time).

[ENOBUFS] No buffer space is available in the system to perform the operation.

[ENOMEM] No memory is available in the system to perform the operation.

[ENOPROTOOPT] The remote system or an intermediate system in the communications path

does not support a protocol option sent by the local system. This option may

have been set using a

getsockopt() or setsockopt() call, or set as a

system parameter.

[ENOTCONN] A

send() on a socket that is not connected, or a send() on a socket that has

not completed the connect sequence with its peer, or is no longer connected to

HP-UX 11i Version 3: September 2010 − 5 − Hewlett-Packard Company 5