pSOSystem System Calls - Read

pNA+ System Calls send
send Sends data to a socket.
#include
long send(
int s, /* socket descriptor */
char *buf, /* packet */
int len, /* packet length */
int flags /* packet attributes */
)
Description
Arguments
The send() system call is used to send data to a foreign socket.
If no buffer space is available at the socket to hold the data to be transmitted,
send() blocks the calling task unless the socket has been marked non-blocking.
Applications can use this call to pass messages to the pNA+ network manager in a
linked list of mblks (message blocks) by setting the MSG_RAWMEM flag (see
“Arguments,” below). Using mblks eliminates the data copy performed in the pNA+
network manager during the data transfer between the application and the pNA+
network manager.
s Specifies the local socket, which must be in a connected state.
If s is a stream socket, the data is sent to the foreign socket that is
connected to s.
If s is a datagram socket, the data is sent to the socket that has been
associated with s through a previous connect() system call.
If s is a raw socket, the raw datagram is sent to the raw socket that
has been associated with s through a previous connect() system
call.
buf Points to a buffer containing the data to send. If s is a datagram
socket, the data that buf points to is a datagram.
len Specifies the number of bytes in buf.
pSOSystem System Calls 4-57
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