pSOSystem System Calls - Read

sendto pNA+ System Calls
sendto Sends data to a socket.
#include
long sendto(
int s, /* socket descriptor */
char *buf, /* packet */
int len, /* packet length */
int flags, /* packet attribute */
struct sockaddr_in *to, /* destination socket type */
int tolen /* size of sockaddr_in */
)
Description
Arguments
The sendto() system call is used to send data to a foreign datagram socket.
Although it is possible to use this system call with stream, datagram, or raw
sockets, it is intended to be used only with datagram sockets or raw sockets.
If no buffer space is available at the socket to hold the datagram, sendto() 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. 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.
buf Points to a buffer that contains the data to send. The data pointed to
by buf is called a datagram.
len Specifies the number of bytes in buf.
flags Specifies usage options and is the result of an OR operation performed
on one or more of the following symbolic constants (defined
in ). It can also be set to 0.
MSG_OOB Specifies that you want sendto() to send outof-band
data, rather than the regular in-band
data.
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