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-.TH IPSEC_PORTOF 3 "8 Sept 2000"
-.SH NAME
-ipsec portof \- get port field of an ip_address
-.br
-ipsec setportof \- set port field of an ip_address
-.br
-ipsec sockaddrof \- get pointer to internal sockaddr of an ip_address
-.br
-ipsec sockaddrlenof \- get length of internal sockaddr of an ip_address
-.SH SYNOPSIS
-.B "#include <freeswan.h>"
-.sp
-.B "int portof(const ip_address *src);"
-.br
-.B "void setportof(int port, ip_address *dst);"
-.br
-.B "struct sockaddr *sockaddrof(ip_address *src);"
-.br
-.B "size_t sockaddrlenof(const ip_address *src);"
-.SH DESCRIPTION
-The
-.B <freeswan.h>
-internal type
-.I ip_address
-contains one of the
-.I sockaddr
-types internally.
-\fIReliance on this feature is discouraged\fR,
-but it may occasionally be necessary.
-These functions provide low-level tools for this purpose.
-.PP
-.I Portof
-and
-.I setportof
-respectively read and write the port-number field of the internal
-.IR sockaddr .
-The values are in network byte order.
-.PP
-.I Sockaddrof
-returns a pointer to the internal
-.IR sockaddr ,
-for passing to other functions.
-.PP
-.I Sockaddrlenof
-reports the size of the internal
-.IR sockaddr ,
-for use in storage allocation.
-.SH SEE ALSO
-inet(3), ipsec_initaddr(3)
-.SH DIAGNOSTICS
-.I Portof
-returns
-.BR \-1 ,
-.I sockaddrof
-returns
-.BR NULL ,
-and
-.I sockaddrlenof
-returns
-.B 0
-if an unknown address family is found within the
-.IR ip_address .
-.SH HISTORY
-Written for the FreeS/WAN project by Henry Spencer.
-.SH BUGS
-These functions all depend on low-level details of the
-.I ip_address
-type, which are in principle subject to change.
-Avoid using them unless really necessary.