ipsec_sockaddrof3
Get port field of an ip_address, set port field of an ip_address, get pointer to internal sockaddr of an ip_address, get length of internal sockaddr of an ip_address
Part of ipsec_portof(3).
Usage
#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);
Overview
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.
Diagnostics
Portof returns -1, sockaddrof returns NULL, and sockaddrlenof returns 0 if an unknown address family is found within the ip_address.
Releases
4 releases since Debian 3.1 (Sarge); the text changed 3 times.