116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/* authd/provider.h - authentication provider framework
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* Copyright (c) 2016 Elizabeth Myers <elizabeth@interlinked.me>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __CHARYBDIS_AUTHD_PROVIDER_H__
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#define __CHARYBDIS_AUTHD_PROVIDER_H__
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#include "stdinc.h"
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#include "rb_dictionary.h"
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#define MAX_PROVIDERS 32 /* This should be enough */
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/* Registered providers */
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typedef enum
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{
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PROVIDER_RDNS,
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PROVIDER_IDENT,
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PROVIDER_BLACKLIST,
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} provider_t;
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struct auth_client
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{
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uint16_t cid; /* Client ID */
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char l_ip[HOSTIPLEN + 1]; /* Listener IP address */
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uint16_t l_port; /* Listener port */
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char c_ip[HOSTIPLEN + 1]; /* Client IP address */
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uint16_t c_port; /* Client port */
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char hostname[HOSTLEN + 1]; /* Used for DNS lookup */
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char username[USERLEN + 1]; /* Used for ident lookup */
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uint32_t providers; /* Providers at work,
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* none left when set to 0 */
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void *data[MAX_PROVIDERS]; /* Provider-specific data slots */
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};
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typedef bool (*provider_init_t)(void);
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typedef bool (*provider_perform_t)(struct auth_client *);
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typedef void (*provider_complete_t)(struct auth_client *, provider_t provider);
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typedef void (*provider_cancel_t)(struct auth_client *);
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typedef void (*provider_destroy_t)(void);
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struct auth_provider
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{
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rb_dlink_node node;
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provider_t id;
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provider_init_t init; /* Initalise the provider */
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provider_destroy_t destroy; /* Terminate the provider */
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provider_perform_t start; /* Perform authentication */
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provider_cancel_t cancel; /* Authentication cancelled */
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provider_complete_t completed; /* Callback for when other performers complete (think dependency chains) */
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};
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extern rb_dlink_list auth_providers;
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extern rb_dictionary *auth_clients;
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extern struct auth_provider rdns_provider;
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extern struct auth_provider ident_provider;
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void load_provider(struct auth_provider *provider);
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void unload_provider(struct auth_provider *provider);
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void init_providers(void);
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void destroy_providers(void);
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void cancel_providers(struct auth_client *auth);
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void provider_done(struct auth_client *auth, provider_t id);
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void accept_client(struct auth_client *auth, provider_t id);
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void reject_client(struct auth_client *auth, provider_t id, const char *reason);
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void notice_client(struct auth_client *auth, const char *notice);
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void handle_new_connection(int parc, char *parv[]);
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/* Provider is operating on this auth_client (set this if you have async work to do) */
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static inline void set_provider(struct auth_client *auth, provider_t provider)
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{
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auth->providers |= (1 << provider);
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}
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/* Provider is no longer operating on this auth client (you should use provider_done) */
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static inline void unset_provider(struct auth_client *auth, provider_t provider)
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{
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auth->providers &= ~(1 << provider);
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}
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/* Check if provider is operating on this auth client */
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static inline bool is_provider(struct auth_client *auth, provider_t provider)
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{
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return auth->providers & (1 << provider);
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}
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#endif /* __CHARYBDIS_AUTHD_PROVIDER_H__ */
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