rc_avpair_gen(3)             Radius client library            rc_avpair_gen(3)

NAME
       rc_avpair_gen - Decode a raw RADIUS attribute buffer into a VALUE_PAIR
       list.

SYNOPSIS
       #include <radcli/>

       VALUE_PAIR * rc_avpair_gen(
           rc_handle const      *rh,
           VALUE_PAIR           *pair,
           unsigned char const  *ptr,
           int                   length,
           uint32_t              vendorspec
       );

DESCRIPTION
       This is a low-level function retained for ABI compatibility with
       freeradius-client and radiusclient-ng. Application code should not call
       it directly; build requests with rc_avpair_add() and send them with
       rc_auth() or rc_acct(), which handle wire encoding and decoding
       internally.

       Decodes the attribute/value region of a received RADIUS packet (the
       bytes that follow the 20-byte fixed header) into a linked list of
       VALUE_PAIR structures. Unknown attributes are logged and skipped; they
       are not a hard error.

PARAMETERS
       rh     a handle to parsed configuration (used for dictionary lookups).


       pair   optional existing VALUE_PAIR list to append decoded attributes
              to; pass NULL to start a fresh list.


       ptr    pointer to the start of the attribute data region.


       length number of bytes in the attribute region.


       vendorspec
              vendor PEN when decoding a vendor-specific sub-attribute block;
              pass 0 for top-level packet attributes.


STRUCTURES

       Avoid using this structure directly. Use rc_avpair_get_uint32() for
       integer/IPv4/date values, rc_avpair_get_in6() for IPv6 addresses and
       prefixes, rc_avpair_get_raw() for string/binary values, and
       rc_avpair_get_attr() to read the attribute type and ID. To iterate the
       list use rc_avpair_next(). Free the entire list with rc_avpair_free().


              struct rc_value_pair {
                char                   name[RC_NAME_LENGTH+1];      // attribute name if known.
                uint64_t               attribute; // attribute numeric value of type rc_attr_id including vendor; use VENDOR() and ATTRID() to separate.
                rc_attr_type           type;      // attribute type.
                uint32_t               lvalue;    // attribute value if type is PW_TYPE_INTEGER, PW_TYPE_DATE or PW_TYPE_IPADDR.
                char                   strvalue[AUTH_STRING_LEN+1];  // contains attribute value in other cases.
                struct rc_value_pair  *next;
                char                   pad[32];       // unused pad
              };


RETURN VALUE
       head of the (possibly extended) VALUE_PAIR list, or NULL on a hard
       decode error (malformed length field, allocation failure).

SEE ALSO
       rc_aaa(3), rc_aaa_ctx(3), rc_aaa_ctx_free(3), rc_aaa_ctx_get_secret(3),
       rc_aaa_ctx_get_vector(3), rc_aaa_ctx_server(3), rc_acct(3),
       rc_acct_async(3), rc_acct_proxy(3), rc_add_config(3),
       rc_apply_config(3), rc_auth(3), rc_auth_proxy(3), rc_avpair_add(3),
       rc_avpair_assign(3), rc_avpair_copy(3), rc_avpair_free(3),
       rc_avpair_get(3), rc_avpair_get_attr(3), rc_avpair_get_in6(3),
       rc_avpair_get_raw(3), rc_avpair_get_uint32(3), rc_avpair_insert(3),
       rc_avpair_log(3), rc_avpair_new(3), rc_avpair_next(3),
       rc_avpair_parse(3), rc_avpair_remove(3), rc_avpair_tostr(3),
       rc_buildreq(3), rc_check(3), rc_conf_int(3), rc_conf_srv(3),
       rc_conf_str(3), rc_config_free(3), rc_config_init(3), rc_destroy(3),
       rc_dict_addattr(3), rc_dict_addval(3), rc_dict_addvend(3),
       rc_dict_findattr(3), rc_dict_findval(3), rc_dict_findvend(3),
       rc_dict_free(3), rc_dict_getattr(3), rc_dict_getval(3),
       rc_dict_getvend(3), rc_find_server_addr(3), rc_get_socket_type(3),
       rc_new(3), rc_read_config(3), rc_read_dictionary(3),
       rc_read_dictionary_from_buffer(3), rc_send_server(3), rc_test_config(3)

radcli                            2026-08-19                  rc_avpair_gen(3)