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krad.h
/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */ /* * Copyright 2013 Red Hat, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * This API is not considered as stable as the main krb5 API. * * - We may make arbitrary incompatible changes between feature releases * (e.g. from 1.12 to 1.13). * - We will make some effort to avoid making incompatible changes for * bugfix releases, but will make them if necessary. */ #ifndef KRAD_H_ #define KRAD_H_ #include <krb5.h> #include <verto.h> #include <stddef.h> #include <stdio.h> #define KRAD_PACKET_SIZE_MAX 4096 #define KRAD_SERVICE_TYPE_LOGIN 1 #define KRAD_SERVICE_TYPE_FRAMED 2 #define KRAD_SERVICE_TYPE_CALLBACK_LOGIN 3 #define KRAD_SERVICE_TYPE_CALLBACK_FRAMED 4 #define KRAD_SERVICE_TYPE_OUTBOUND 5 #define KRAD_SERVICE_TYPE_ADMINISTRATIVE 6 #define KRAD_SERVICE_TYPE_NAS_PROMPT 7 #define KRAD_SERVICE_TYPE_AUTHENTICATE_ONLY 8 #define KRAD_SERVICE_TYPE_CALLBACK_NAS_PROMPT 9 #define KRAD_SERVICE_TYPE_CALL_CHECK 10 #define KRAD_SERVICE_TYPE_CALLBACK_ADMINISTRATIVE 11 typedef struct krad_attrset_st krad_attrset; typedef struct krad_packet_st krad_packet; typedef struct krad_client_st krad_client; typedef unsigned char krad_code; typedef unsigned char krad_attr; /* Called when a response is received or the request times out. */ typedef void (*krad_cb)(krb5_error_code retval, const krad_packet *request, const krad_packet *response, void *data); /* * Called to iterate over a set of requests. Either the callback will be * called until it returns NULL, or it will be called with cancel = TRUE to * terminate in the middle of an iteration. */ typedef const krad_packet * (*krad_packet_iter_cb)(void *data, krb5_boolean cancel); /* * Code */ /* Convert a code name to its number. Only works for codes defined * by RFC 2875 or 2882. Returns 0 if the name was not found. */ krad_code krad_code_name2num(const char *name); /* Convert a code number to its name. Only works for attributes defined * by RFC 2865 or 2882. Returns NULL if the name was not found. */ const char * krad_code_num2name(krad_code code); /* * Attribute */ /* Convert an attribute name to its number. Only works for attributes defined * by RFC 2865. Returns 0 if the name was not found. */ krad_attr krad_attr_name2num(const char *name); /* Convert an attribute number to its name. Only works for attributes defined * by RFC 2865. Returns NULL if the name was not found. */ const char * krad_attr_num2name(krad_attr type); /* * Attribute set */ /* Create a new attribute set. */ krb5_error_code krad_attrset_new(krb5_context ctx, krad_attrset **set); /* Create a deep copy of an attribute set. */ krb5_error_code krad_attrset_copy(const krad_attrset *set, krad_attrset **copy); /* Free an attribute set. */ void krad_attrset_free(krad_attrset *set); /* Add an attribute to a set. */ krb5_error_code krad_attrset_add(krad_attrset *set, krad_attr type, const krb5_data *data); /* Add a four-octet unsigned number attribute to the given set. */ krb5_error_code krad_attrset_add_number(krad_attrset *set, krad_attr type, krb5_ui_4 num); /* Delete the specified attribute. */ void krad_attrset_del(krad_attrset *set, krad_attr type, size_t indx); /* Get the specified attribute. */ const krb5_data * krad_attrset_get(const krad_attrset *set, krad_attr type, size_t indx); /* * Packet */ /* Determine the bytes needed from the socket to get the whole packet. Don't * cache the return value as it can change! Returns -1 on EBADMSG. */ ssize_t krad_packet_bytes_needed(const krb5_data *buffer); /* Free a packet. */ void krad_packet_free(krad_packet *pkt); /* * Create a new request packet. * * This function takes the attributes specified in set and converts them into a * radius packet. The packet will have a randomized id. If cb is not NULL, it * will be called passing data as the argument to iterate over a set of * outstanding requests. In this case, the id will be both random and unique * across the set of requests. */ krb5_error_code krad_packet_new_request(krb5_context ctx, const char *secret, krad_code code, const krad_attrset *set, krad_packet_iter_cb cb, void *data, krad_packet **request); /* * Create a new response packet. * * This function is similar to krad_packet_new_requst() except that it crafts a * packet in response to a request packet. This new packet will borrow values * from the request such as the id and the authenticator. */ krb5_error_code krad_packet_new_response(krb5_context ctx, const char *secret, krad_code code, const krad_attrset *set, const krad_packet *request, krad_packet **response); /* * Decode a request radius packet from krb5_data. * * The resulting decoded packet will be a request packet stored in *reqpkt. * * If cb is NULL, *duppkt will always be NULL. * * If cb is not NULL, it will be called (with the data argument) to iterate * over a set of requests currently being processed. In this case, if the * packet is a duplicate of an already received request, the original request * will be set in *duppkt. */ krb5_error_code krad_packet_decode_request(krb5_context ctx, const char *secret, const krb5_data *buffer, krad_packet_iter_cb cb, void *data, const krad_packet **duppkt, krad_packet **reqpkt); /* * Decode a response radius packet from krb5_data. * * The resulting decoded packet will be a response packet stored in *rsppkt. * * If cb is NULL, *reqpkt will always be NULL. * * If cb is not NULL, it will be called (with the data argument) to iterate * over a set of requests awaiting responses. In this case, if the response * packet matches one of these requests, the original request will be set in * *reqpkt. */ krb5_error_code krad_packet_decode_response(krb5_context ctx, const char *secret, const krb5_data *buffer, krad_packet_iter_cb cb, void *data, const krad_packet **reqpkt, krad_packet **rsppkt); /* Encode packet. */ const krb5_data * krad_packet_encode(const krad_packet *pkt); /* Get the code for the given packet. */ krad_code krad_packet_get_code(const krad_packet *pkt); /* Get the specified attribute. */ const krb5_data * krad_packet_get_attr(const krad_packet *pkt, krad_attr type, size_t indx); /* * Client */ /* Create a new client. */ krb5_error_code krad_client_new(krb5_context kctx, verto_ctx *vctx, krad_client **client); /* Free the client. */ void krad_client_free(krad_client *client); /* * Send a request to a radius server. * * The remote host may be specified by one of the following formats: * - /path/to/unix.socket * - IPv4 * - IPv4:port * - IPv4:service * - [IPv6] * - [IPv6]:port * - [IPv6]:service * - hostname * - hostname:port * - hostname:service * * The timeout parameter (milliseconds) is the total timeout across all remote * hosts (when DNS returns multiple entries) and all retries. For stream * sockets, the retries parameter is ignored and no retries are performed. * * The cb function will be called with the data argument when either a response * is received or the request times out on all possible remote hosts. */ krb5_error_code krad_client_send(krad_client *rc, krad_code code, const krad_attrset *attrs, const char *remote, const char *secret, int timeout, size_t retries, krad_cb cb, void *data); #endif /* KRAD_H_ */
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