IPSEC_PORTOF(3)IPSEC_PORTOF(3)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 ALSOinet(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.
8 Sept 2000 IPSEC_PORTOF(3)
