Poster of Linux kernelThe best gift for a Linux geek
IPSEC_PORTOF

IPSEC_PORTOF

Section: C Library Functions (3) Updated: 8 Sept 2000
Local index Up
 

NAME

ipsec portof - get port field of an ip_address
ipsec setportof - set port field of an ip_address
ipsec sockaddrof - get pointer to internal sockaddr of an ip_address
ipsec sockaddrlenof - get length of internal sockaddr of an ip_address  

SYNOPSIS

#include <freeswan.h>

int portof(const ip_address *src);
void setportof(int port, ip_address *dst);
struct sockaddr *sockaddrof(ip_address *src);
size_t sockaddrlenof(const ip_address *src);  

DESCRIPTION

The <freeswan.h> internal type ip_address contains one of the sockaddr types internally. Reliance on this feature is discouraged, but it may occasionally be necessary. These functions provide low-level tools for this purpose.

Portof and setportof respectively read and write the port-number field of the internal sockaddr. The values are in network byte order.

Sockaddrof returns a pointer to the internal sockaddr, for passing to other functions.

Sockaddrlenof reports the size of the internal sockaddr, for use in storage allocation.  

SEE ALSO

inet(3), ipsec_initaddr(3)  

DIAGNOSTICS

Portof returns -1, sockaddrof returns NULL, and sockaddrlenof returns 0 if an unknown address family is found within the ip_address.  

HISTORY

Written for the FreeS/WAN project by Henry Spencer.  

BUGS

These functions all depend on low-level details of the ip_address type, which are in principle subject to change. Avoid using them unless really necessary.


 

Index

NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
DIAGNOSTICS
HISTORY
BUGS

This document was created by man2html, using the manual pages.
Time: 22:39:01 GMT, April 16, 2011