NAME

inet6_opt_set_val − Insert data items into the data portion of the IPv6 option

SYNOPSIS

#include <netinet/ip6.h>
int inet6_opt_set_val(
        void ∗databuf,
        size_t offset,
        void ∗val,
        int vallen );

LIBRARY

Standard C Library (libc)

PARAMETERS

databuf
Points to a buffer that contains an extension header. This is a pointer returned by a call to inet6_opt_append(). 

offset
Specifies the location in the data portion of the option into which to insert the data. You can access the first byte after the option type and length by specifying the offset of 0 (zero). 

valPoints to the data to be inserted. 

vallen
Specifies the length of the data, in bytes, to be inserted.

DESCRIPTION

The inet6_opt_set_val() function copies data items at the location val into a data buffer databuf beginning at offset. In addition, it returns the offset for the next data field to assist you in composing content that has multiple fields. 

Make sure that each field is aligned on its natural boundaries. 

RETURN VALUES

Upon successful completion, the inet6_opt_set_val() function returns the offset for the next field in the data buffer. Upon failure, it returns a -1. 

SEE ALSO

Functions: inet6_opt_append(3), inet6_opt_find(3), inet6_opt_finish(3), inet6_opt_get_val(3), inet6_opt_init(3), inet6_opt_next(3). 

Network Programmer’s Guide