authd/provider: overhaul storage of various pieces of data
Clients are stored in a dictionary referenced by id (to allow for UINT32_MAX auth clients, which is plenty). Each provider now has a data slot (this limits the number of providers to 32 for now, but that's plenty for now) which they can use to attach data to auth_clients. This consolidates data, aids in debugging, and makes it easier to just pass around auth_client structures.
This commit is contained in:
Elizabeth Myers
parent
238a9ed590
commit
3e875f629f
4 changed files with 121 additions and 207 deletions
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@ -27,7 +27,8 @@
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* Providers can either return failure immediately, immediate acceptance, or
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* do work in the background (calling set_provider to signal this).
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*
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* A dictionary is provided in auth_client for storage of provider-specific data.
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* Provider-specific data for each client can be kept in an index of the data
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* struct member (using the provider's ID).
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*
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* All providers must implement at a minimum a perform_provider function. You
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* don't have to implement the others if you don't need them.
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@ -49,11 +50,15 @@
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rb_dlink_list auth_providers;
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/* Clients waiting */
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struct auth_client auth_clients[MAX_CLIENTS];
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struct Dictionary *auth_clients;
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/* Load a provider */
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void load_provider(struct auth_provider *provider)
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{
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if(rb_dlink_list_length(&auth_providers) >= MAX_PROVIDERS)
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/* XXX should probably warn here */
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return;
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provider->init();
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rb_dlinkAdd(provider, &provider->node, &auth_providers);
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}
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@ -67,6 +72,7 @@ void unload_provider(struct auth_provider *provider)
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/* Initalise all providers */
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void init_providers(void)
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{
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auth_clients = rb_dictionary_create("pending auth clients", rb_uint32cmp);
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load_provider(&rdns_provider);
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load_provider(&ident_provider);
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}
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@ -75,17 +81,15 @@ void init_providers(void)
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void destroy_providers(void)
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{
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rb_dlink_node *ptr;
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struct DictionaryIter iter;
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struct auth_client *auth;
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struct auth_provider *provider;
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/* Cancel outstanding connections */
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for (size_t i = 0; i < MAX_CLIENTS; i++)
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{
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if(auth_clients[i].cid)
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DICTIONARY_FOREACH(auth, &iter, auth_clients)
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{
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/* TBD - is this the right thing? */
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reject_client(&auth_clients[i], 0,
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"Authentication system is down... try reconnecting in a few seconds");
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}
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reject_client(auth, 0, "Authentication system is down... try reconnecting in a few seconds");
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}
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RB_DLINK_FOREACH(ptr, auth_providers.head)
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@ -112,9 +116,8 @@ void cancel_providers(struct auth_client *auth)
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provider->cancel(auth);
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}
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/* All data should be already destroyed */
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rb_dictionary_destroy(auth->data, NULL, NULL);
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auth->data = NULL;
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rb_dictionary_delete(auth_clients, RB_UINT_TO_POINTER(auth->cid));
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rb_free(auth);
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}
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/* Provider is done */
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@ -145,7 +148,6 @@ void provider_done(struct auth_client *auth, provider_t id)
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/* Reject a client */
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void reject_client(struct auth_client *auth, provider_t id, const char *reason)
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{
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uint16_t cid = auth->cid;
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char reject;
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switch(id)
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@ -159,7 +161,6 @@ void reject_client(struct auth_client *auth, provider_t id, const char *reason)
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case PROVIDER_BLACKLIST:
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reject = 'B';
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break;
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case PROVIDER_NULL:
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default:
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reject = 'N';
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break;
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@ -170,19 +171,17 @@ void reject_client(struct auth_client *auth, provider_t id, const char *reason)
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unset_provider(auth, id);
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cancel_providers(auth);
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memset(&auth_clients[cid], 0, sizeof(struct auth_client));
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}
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/* Accept a client, cancel outstanding providers if any */
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void accept_client(struct auth_client *auth, provider_t id)
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{
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uint16_t cid = auth->cid;
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uint32_t cid = auth->cid;
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rb_helper_write(authd_helper, "A %x %s %s", auth->cid, auth->username, auth->hostname);
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unset_provider(auth, id);
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cancel_providers(auth);
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memset(&auth_clients[cid], 0, sizeof(struct auth_client));
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}
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/* Send a notice to a client */
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@ -195,20 +194,14 @@ void notice_client(struct auth_client *auth, const char *notice)
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static void start_auth(const char *cid, const char *l_ip, const char *l_port, const char *c_ip, const char *c_port)
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{
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struct auth_provider *provider;
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struct auth_client *auth;
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struct auth_client *auth = rb_malloc(sizeof(struct auth_client));
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long lcid = strtol(cid, NULL, 16);
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char name[20];
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rb_dlink_node *ptr;
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if(lcid >= MAX_CLIENTS)
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if(lcid >= UINT32_MAX)
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return;
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auth = &auth_clients[lcid];
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if(auth->cid != 0)
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/* Shouldn't get here */
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return;
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auth->cid = (uint16_t)lcid;
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auth->cid = (uint32_t)lcid;
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rb_strlcpy(auth->l_ip, l_ip, sizeof(auth->l_ip));
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auth->l_port = (uint16_t)atoi(l_port); /* should be safe */
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@ -216,8 +209,7 @@ static void start_auth(const char *cid, const char *l_ip, const char *l_port, co
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rb_strlcpy(auth->c_ip, c_ip, sizeof(auth->c_ip));
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auth->c_port = (uint16_t)atoi(c_port);
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snprintf(name, sizeof(name), "%d provider data", auth->cid);
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auth->data = rb_dictionary_create(name, rb_uint32cmp);
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rb_dictionary_add(auth_clients, RB_UINT_TO_POINTER(auth->cid), auth);
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RB_DLINK_FOREACH(ptr, auth_providers.head)
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{
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@ -22,17 +22,16 @@
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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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/* Arbitrary limit */
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#define MAX_CLIENTS 4096
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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_NULL = 0x0, /* Dummy value */
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PROVIDER_RDNS = 0x1,
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PROVIDER_IDENT = 0x2,
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PROVIDER_BLACKLIST = 0x4,
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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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@ -48,10 +47,10 @@ struct auth_client
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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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unsigned int providers; /* Providers at work,
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uint32_t providers; /* Providers at work,
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* none left when set to 0 */
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struct Dictionary *data; /* Provider-specific data */
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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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@ -75,11 +74,11 @@ struct auth_provider
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};
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extern rb_dlink_list auth_providers;
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extern struct 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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extern struct auth_client auth_clients[MAX_CLIENTS];
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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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@ -98,19 +97,19 @@ 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 |= provider;
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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 &= ~provider;
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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 & provider;
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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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@ -28,9 +28,6 @@
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struct ident_query
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{
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rb_dlink_node node;
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struct auth_client *auth; /* Our client */
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time_t timeout; /* Timeout interval */
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rb_fde_t *F; /* Our FD */
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};
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@ -54,12 +51,10 @@ static EVH timeout_ident_queries_event;
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static CNCB ident_connected;
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static PF read_ident_reply;
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static void client_fail(struct ident_query *query, ident_message message);
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static void client_success(struct ident_query *query);
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static void cleanup_query(struct ident_query *query);
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static void client_fail(struct auth_client *auth, ident_message message);
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static void client_success(struct auth_client *auth);
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static char * get_valid_ident(char *buf);
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static rb_dlink_list queries;
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static struct ev_entry *timeout_ev;
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static int ident_timeout = 5;
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@ -72,18 +67,14 @@ bool ident_init(void)
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void ident_destroy(void)
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{
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rb_dlink_node *ptr, *nptr;
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struct auth_client *auth;
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struct DictionaryIter iter;
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/* Nuke all ident queries */
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RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
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DICTIONARY_FOREACH(auth, &iter, auth_clients)
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{
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struct ident_query *query = ptr->data;
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notice_client(query->auth, messages[REPORT_FAIL]);
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rb_close(query->F);
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rb_free(query);
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rb_dlinkDelete(ptr, &queries);
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if(auth->data[PROVIDER_IDENT] != NULL)
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client_fail(auth, REPORT_FAIL);
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}
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}
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@ -94,12 +85,12 @@ bool ident_start(struct auth_client *auth)
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int family;
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rb_fde_t *F;
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query->auth = auth;
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auth->data[PROVIDER_IDENT] = query;
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query->timeout = rb_current_time() + ident_timeout;
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if((F = rb_socket(family, SOCK_STREAM, 0, "ident")) == NULL)
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{
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client_fail(query, REPORT_FAIL);
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client_fail(auth, REPORT_FAIL);
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return true; /* Not a fatal error */
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}
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@ -109,7 +100,7 @@ bool ident_start(struct auth_client *auth)
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if(!rb_inet_ntop_sock((struct sockaddr *)&l_addr, auth->l_ip, sizeof(l_addr)) ||
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!rb_inet_ntop_sock((struct sockaddr *)&c_addr, auth->c_ip, sizeof(c_addr)))
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{
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client_fail(query, REPORT_FAIL);
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client_fail(auth, REPORT_FAIL);
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return true;
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}
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@ -133,52 +124,32 @@ bool ident_start(struct auth_client *auth)
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GET_SS_LEN(&l_addr), ident_connected,
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query, ident_timeout);
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rb_dlinkAdd(query, &query->node, &queries);
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set_provider(auth, PROVIDER_IDENT);
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notice_client(auth, messages[REPORT_LOOKUP]);
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set_provider(auth, PROVIDER_IDENT);
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return true;
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}
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void ident_cancel(struct auth_client *auth)
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{
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rb_dlink_node *ptr, *nptr;
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struct ident_query *query = auth->data[PROVIDER_IDENT];
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RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
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{
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struct ident_query *query = ptr->data;
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if(query->auth == auth)
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{
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client_fail(query, REPORT_FAIL);
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rb_close(query->F);
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rb_free(query);
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rb_dlinkDelete(ptr, &queries);
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return;
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}
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}
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if(query != NULL)
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client_fail(auth, REPORT_FAIL);
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}
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/* Timeout outstanding queries */
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static void timeout_ident_queries_event(void *notused)
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{
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rb_dlink_node *ptr, *nptr;
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struct auth_client *auth;
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struct DictionaryIter iter;
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RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
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DICTIONARY_FOREACH(auth, &iter, auth_clients)
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{
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struct ident_query *query = ptr->data;
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struct ident_query *query = auth->data[PROVIDER_IDENT];
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if(query->timeout < rb_current_time())
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{
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client_fail(query, REPORT_FAIL);
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rb_close(query->F);
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rb_free(query);
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rb_dlinkDelete(ptr, &queries);
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}
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if(query != NULL && query->timeout < rb_current_time())
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client_fail(auth, REPORT_FAIL);
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}
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}
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@ -195,8 +166,8 @@ static void timeout_ident_queries_event(void *notused)
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*/
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static void ident_connected(rb_fde_t *F, int error, void *data)
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{
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struct ident_query *query = data;
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struct auth_client *auth = query->auth;
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struct auth_client *auth = data;
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struct ident_query *query = auth->data[PROVIDER_IDENT];
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char authbuf[32];
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int authlen;
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@ -204,8 +175,7 @@ static void ident_connected(rb_fde_t *F, int error, void *data)
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if(error != RB_OK)
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{
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/* We had an error during connection :( */
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client_fail(query, REPORT_FAIL);
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cleanup_query(query);
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client_fail(auth, REPORT_FAIL);
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return;
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}
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@ -215,18 +185,18 @@ static void ident_connected(rb_fde_t *F, int error, void *data)
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if(rb_write(query->F, authbuf, authlen) != authlen)
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{
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client_fail(query, REPORT_FAIL);
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client_fail(auth, REPORT_FAIL);
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return;
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}
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read_ident_reply(query->F, query);
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read_ident_reply(query->F, auth);
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}
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static void
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read_ident_reply(rb_fde_t *F, void *data)
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{
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struct ident_query *query = data;
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struct auth_client *auth = query->auth;
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struct auth_client *auth = data;
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struct ident_query *query = auth->data[PROVIDER_IDENT];
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char *s = NULL;
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char *t = NULL;
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int len;
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@ -268,51 +238,35 @@ read_ident_reply(rb_fde_t *F, void *data)
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}
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if(s == NULL)
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client_fail(query, REPORT_FAIL);
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client_fail(auth, REPORT_FAIL);
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else
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client_success(query);
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cleanup_query(query);
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client_success(auth);
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}
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static void client_fail(struct ident_query *query, ident_message report)
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static void client_fail(struct auth_client *auth, ident_message report)
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{
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struct auth_client *auth = query->auth;
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struct ident_query *query = auth->data[PROVIDER_IDENT];
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if(auth)
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{
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rb_strlcpy(auth->username, "*", sizeof(auth->username));
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rb_close(query->F);
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rb_free(query);
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auth->data[PROVIDER_IDENT] = NULL;
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notice_client(auth, messages[report]);
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provider_done(auth, PROVIDER_IDENT);
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}
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}
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static void client_success(struct ident_query *query)
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static void client_success(struct auth_client *auth)
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{
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struct auth_client *auth = query->auth;
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struct ident_query *query = auth->data[PROVIDER_IDENT];
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if(auth)
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{
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notice_client(auth, messages[REPORT_FOUND]);
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provider_done(auth, PROVIDER_IDENT);
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}
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}
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static void cleanup_query(struct ident_query *query)
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{
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rb_dlink_node *ptr, *nptr;
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RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
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{
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struct ident_query *query_l = ptr->data;
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if(query_l == query)
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{
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rb_close(query->F);
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rb_free(query);
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rb_dlinkDelete(ptr, &queries);
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}
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}
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auth->data[PROVIDER_IDENT] = NULL;
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notice_client(auth, messages[REPORT_FOUND]);
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provider_done(auth, PROVIDER_IDENT);
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}
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/* get_valid_ident
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@ -29,7 +29,6 @@ struct user_query
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{
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rb_dlink_node node;
|
||||
|
||||
struct auth_client *auth; /* Our client */
|
||||
struct dns_query *query; /* Pending DNS query */
|
||||
time_t timeout; /* When the request times out */
|
||||
};
|
||||
|
|
@ -51,14 +50,13 @@ typedef enum
|
|||
REPORT_TOOLONG,
|
||||
} dns_message;
|
||||
|
||||
static void client_fail(struct user_query *query, dns_message message);
|
||||
static void client_success(struct user_query *query);
|
||||
static void client_fail(struct auth_client *auth, dns_message message);
|
||||
static void client_success(struct auth_client *auth);
|
||||
static void get_dns_answer(const char *res, bool status, query_type type, void *data);
|
||||
|
||||
static struct ev_entry *timeout_ev;
|
||||
static EVH timeout_dns_queries_event;
|
||||
static int rdns_timeout = 30;
|
||||
static rb_dlink_list queries; /* Stored here for easy timeout */
|
||||
|
||||
|
||||
bool client_dns_init(void)
|
||||
|
|
@ -69,14 +67,13 @@ bool client_dns_init(void)
|
|||
|
||||
void client_dns_destroy(void)
|
||||
{
|
||||
rb_dlink_node *ptr, *nptr;
|
||||
struct user_query *query;
|
||||
struct auth_client *auth;
|
||||
struct DictionaryIter iter;
|
||||
|
||||
RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
|
||||
DICTIONARY_FOREACH(auth, &iter, auth_clients)
|
||||
{
|
||||
client_fail(ptr->data, REPORT_FAIL);
|
||||
rb_dlinkDelete(ptr, &queries);
|
||||
rb_free(ptr);
|
||||
if(auth->data[PROVIDER_RDNS] != NULL)
|
||||
client_fail(auth, REPORT_FAIL);
|
||||
}
|
||||
|
||||
rb_event_delete(timeout_ev);
|
||||
|
|
@ -86,10 +83,11 @@ bool client_dns_start(struct auth_client *auth)
|
|||
{
|
||||
struct user_query *query = rb_malloc(sizeof(struct user_query));
|
||||
|
||||
query->auth = auth;
|
||||
query->timeout = rb_current_time() + rdns_timeout;
|
||||
|
||||
query->query = lookup_hostname(auth->c_ip, get_dns_answer, query);
|
||||
auth->data[PROVIDER_RDNS] = query;
|
||||
|
||||
query->query = lookup_hostname(auth->c_ip, get_dns_answer, auth);
|
||||
|
||||
notice_client(auth, messages[REPORT_LOOKUP]);
|
||||
set_provider(auth, PROVIDER_RDNS);
|
||||
|
|
@ -98,104 +96,75 @@ bool client_dns_start(struct auth_client *auth)
|
|||
|
||||
void client_dns_cancel(struct auth_client *auth)
|
||||
{
|
||||
rb_dlink_node *ptr, *nptr;
|
||||
struct user_query *query = auth->data[PROVIDER_RDNS];
|
||||
|
||||
RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
|
||||
{
|
||||
struct user_query *query = ptr->data;
|
||||
|
||||
if(query->auth == auth)
|
||||
{
|
||||
/* Victim found */
|
||||
client_fail(query, REPORT_FAIL);
|
||||
rb_dlinkDelete(ptr, &queries);
|
||||
rb_free(query);
|
||||
return;
|
||||
}
|
||||
}
|
||||
if(query != NULL)
|
||||
client_fail(auth, REPORT_FAIL);
|
||||
}
|
||||
|
||||
static void
|
||||
get_dns_answer(const char *res, bool status, query_type type, void *data)
|
||||
{
|
||||
struct user_query *query = data;
|
||||
struct auth_client *auth = query->auth;
|
||||
bool fail = false;
|
||||
dns_message response;
|
||||
rb_dlink_node *ptr, *nptr;
|
||||
struct auth_client *auth = data;
|
||||
struct user_query *query = auth->data[PROVIDER_RDNS];
|
||||
|
||||
if(res == NULL || status == false)
|
||||
{
|
||||
response = REPORT_FAIL;
|
||||
fail = true;
|
||||
goto cleanup;
|
||||
}
|
||||
if(query == NULL || res == NULL || status == false)
|
||||
client_fail(auth, REPORT_FAIL);
|
||||
else if(strlen(res) > HOSTLEN)
|
||||
{
|
||||
/* Ah well. */
|
||||
response = REPORT_TOOLONG;
|
||||
fail = true;
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
rb_strlcpy(auth->hostname, res, HOSTLEN + 1);
|
||||
|
||||
cleanup:
|
||||
/* Clean us up off the pending queries list */
|
||||
RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
|
||||
{
|
||||
struct user_query *query_l = ptr->data;
|
||||
|
||||
if(query == query_l)
|
||||
{
|
||||
/* Found */
|
||||
if(fail)
|
||||
client_fail(query, response);
|
||||
client_fail(auth, REPORT_TOOLONG);
|
||||
else
|
||||
client_success(query);
|
||||
|
||||
rb_dlinkDelete(ptr, &queries);
|
||||
rb_free(query);
|
||||
return;
|
||||
}
|
||||
{
|
||||
rb_strlcpy(auth->hostname, res, HOSTLEN + 1);
|
||||
client_success(auth);
|
||||
}
|
||||
}
|
||||
|
||||
/* Timeout outstanding queries */
|
||||
static void timeout_dns_queries_event(void *notused)
|
||||
{
|
||||
rb_dlink_node *ptr, *nptr;
|
||||
struct auth_client *auth;
|
||||
struct DictionaryIter iter;
|
||||
|
||||
RB_DLINK_FOREACH_SAFE(ptr, nptr, queries.head)
|
||||
DICTIONARY_FOREACH(auth, &iter, auth_clients)
|
||||
{
|
||||
struct user_query *query = ptr->data;
|
||||
struct user_query *query = auth->data[PROVIDER_RDNS];
|
||||
|
||||
if(query->auth && query->timeout < rb_current_time())
|
||||
if(query != NULL && query->timeout < rb_current_time())
|
||||
{
|
||||
client_fail(query, REPORT_FAIL);
|
||||
rb_dlinkDelete(ptr, &queries);
|
||||
rb_free(query);
|
||||
client_fail(auth, REPORT_FAIL);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void client_fail(struct user_query *query, dns_message report)
|
||||
static void client_fail(struct auth_client *auth, dns_message report)
|
||||
{
|
||||
struct auth_client *auth = query->auth;
|
||||
struct user_query *query = auth->data[PROVIDER_RDNS];
|
||||
|
||||
if(query == NULL)
|
||||
return;
|
||||
|
||||
rb_strlcpy(auth->hostname, "*", sizeof(auth->hostname));
|
||||
|
||||
notice_client(auth, messages[report]);
|
||||
cancel_query(query->query);
|
||||
|
||||
rb_free(query);
|
||||
auth->data[PROVIDER_RDNS] = NULL;
|
||||
|
||||
provider_done(auth, PROVIDER_RDNS);
|
||||
}
|
||||
|
||||
static void client_success(struct user_query *query)
|
||||
static void client_success(struct auth_client *auth)
|
||||
{
|
||||
struct auth_client *auth = query->auth;
|
||||
struct user_query *query = auth->data[PROVIDER_RDNS];
|
||||
|
||||
notice_client(auth, messages[REPORT_FOUND]);
|
||||
cancel_query(query->query);
|
||||
|
||||
rb_free(query);
|
||||
auth->data[PROVIDER_RDNS] = NULL;
|
||||
|
||||
provider_done(auth, PROVIDER_RDNS);
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue