NET_ADDRCMP(3) BSD Library Functions Manual NET_ADDRCMP(3)
NAME
net_addrcmp - compare socket address structures
SYNOPSIS
#include <netdb.h>
int
net_addrcmp(struct sockaddr *sa1, struct sockaddr *sa2);
DESCRIPTION
The net_addrcmp() function compares two socket address structures, sa1
and sa2.
RETURN VALUES
If sa1 and sa2 are for the same address, net_addrcmp() returns 0.
The sa_len fields are compared first. If they do not match,
net_addrcmp() returns -1 or 1 if sa1->sa_len is less than or greater than
sa2->sa_len, respectively.
Next, the sa_family members are compared. If they do not match,
net_addrcmp() returns -1 or 1 if sa1->sa_family is less than or greater
than sa2->sa_family, respectively.
Lastly, if each socket address structure's sa_len and sa_family fields
match, the protocol-specific data (the sa_data field) is compared. If
there's a match, both sa1 and sa2 must refer to the same address, and 0
is returned; otherwise, a value >0 or <0 is returned.
HISTORY
A net_addrcmp() function was added in OpenBSD 2.5.
BSD July 3, 1999 BSD
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