1 #include "opensrf/transport_client.h"
2 #include "opensrf/transport_message.h"
3 #include "opensrf/osrf_message.h"
6 #include <sys/select.h>
11 #define ROUTER_MAX_TRUSTED 256
13 // ----------------------------------------------------------------------
14 // Jabber router_registrar/load balancer. There is a top level linked list of
15 // server_class_nodes. A server class represents the a cluster of Jabber
16 // clients that define a single logical routing endpoint. Each of these
17 // server_class_nodes maintains a list of connected server_nodes, which
18 // represents the pool of connected server endpoints. A request
19 // directed at a particular class is routed to the next available
22 // ----------------------------------------------------------------------
25 // ----------------------------------------------------------------------
26 // Defines an element in a server list. The server list is a circular
27 // doubly linked list. User is responsible for freeing a server_node with
29 // ----------------------------------------------------------------------
30 struct server_node_struct {
32 struct server_node_struct* next;
33 struct server_node_struct* prev;
35 time_t la_time; /* last time we sent a message to a server */
36 time_t reg_time; /* time we originally registered */
37 time_t upd_time; /* last re-register time */
38 int available; /* true if we may be used */
40 int serve_count; /* how many messages we've sent */
42 /* jabber remote id for this server node*/
45 /* we cache the last sent message in case our remote
46 endpoint has gone away. If it has, the next server
47 node in the list will re-send our last message */
48 transport_message* last_sent;
51 typedef struct server_node_struct server_node;
54 // ----------------------------------------------------------------------
55 // Models a basic jabber connection structure. Any component that
56 // connects to jabber will have one of these.
57 // ----------------------------------------------------------------------
58 struct jabber_connect_struct {
67 transport_client* t_client;
69 typedef struct jabber_connect_struct jabber_connect;
73 // ----------------------------------------------------------------------
74 // Defines an element in the list of server classes. User is
75 // responsible for freeing a server_class_node with
76 // server_class_node_free().
77 // The server_node_list is a doubly (not circular) linked list
78 // ----------------------------------------------------------------------
79 struct server_class_node_struct {
81 /* the name of our class. This will be used as the jabber
82 resource when we create a class level connection*/
85 /* the current node in the ring of available server nodes */
86 server_node* current_server_node;
88 /* next and prev class_node pointers */
89 struct server_class_node_struct* next;
90 struct server_class_node_struct* prev;
92 /* our jabber connection struct */
93 jabber_connect* jabber;
96 typedef struct server_class_node_struct server_class_node;
99 // ----------------------------------------------------------------------
100 // Top level router_registrar object. Maintains the list of
101 // server_class_nodes and the top level router jabber connection.
102 // ----------------------------------------------------------------------
103 struct transport_router_registrar_struct {
105 /* the list of server class nodes */
106 server_class_node* server_class_list;
108 /* if we don't hear from the client in this amount of time
109 we consider them dead... */
110 /* not currently used */
111 int client_timeout; /* seconds */
113 /* our top level connection to the jabber server */
114 jabber_connect* jabber;
116 /* true if we connect to jabber as a jabber component */
119 char** trusted_servers;
120 char** trusted_clients;
124 typedef struct transport_router_registrar_struct transport_router_registrar;
127 // ----------------------------------------------------------------------
128 // Returns an allocated transport_router_registrar. The user is responsible for
129 // freeing the allocated memory with router_registrar_free()
130 // client_timeout is unused at this time.
131 // connect_timeout is how long we will wait for a failed jabber connect
132 // attempt for the top level connection.
133 // ----------------------------------------------------------------------
134 transport_router_registrar* router_registrar_init( char* server,
135 int port, char* username, char* password, char* resource,
136 int client_timeout, int connect_timeout, int component );
138 // ----------------------------------------------------------------------
139 // Connects the top level router_registrar object to the Jabber server.
140 // ----------------------------------------------------------------------
141 int router_registrar_connect( transport_router_registrar* router );
143 // ----------------------------------------------------------------------
144 // Connects the given jabber_connect object to the Jabber server
145 // ----------------------------------------------------------------------
146 int j_connect( jabber_connect* jabber );
149 // ----------------------------------------------------------------------
150 // Builds and initializes a jabber_connect object. User is responsible
151 // for freeing the memory with jabber_connect_free();
152 // ----------------------------------------------------------------------
153 jabber_connect* jabber_connect_init( char* server,
154 int port, char* username, char* password,
155 char* resource, int connect_timeout, int component );
157 // ----------------------------------------------------------------------
158 // Allocates and initializes a server class instance. This will be
159 // called when a new class message arrives. It will connect to Jabber
160 // as router_registrar->username@router_registrar->server/new_class
161 // ----------------------------------------------------------------------
162 server_class_node* init_server_class(
163 transport_router_registrar* router_registrar, char* remote_id, char* server_class );
165 // ----------------------------------------------------------------------
166 // Allocates and initializes a server_node object. The object must
167 // be freed with server_node_free().
168 // remote_id is the full jabber login for the remote server connection
169 // I.e. where we send messages when we want to send them to this
171 // ----------------------------------------------------------------------
172 server_node* init_server_node( char* remote_id );
175 // ----------------------------------------------------------------------
176 // Routes messages sent to the provided server_class_node's class
177 // ----------------------------------------------------------------------
178 int server_class_handle_msg( transport_router_registrar* router,
179 server_class_node* s_node, transport_message* msg );
181 // ----------------------------------------------------------------------
182 // Determines what to do with an inbound register/unregister message.
183 // ----------------------------------------------------------------------
184 int router_registrar_handle_msg( transport_router_registrar*, transport_message* msg );
186 // ----------------------------------------------------------------------
187 // Deallocates the memory occupied by the given server_node
188 // ----------------------------------------------------------------------
189 int server_node_free( server_node* node );
191 // ----------------------------------------------------------------------
192 // Deallocates the memory used by the given server_class_node. This
193 // will also free any attached server_node's.
194 // ----------------------------------------------------------------------
195 int server_class_node_free( server_class_node* node );
197 // ----------------------------------------------------------------------
198 // Deallocates the memory used by a server_node
199 // ----------------------------------------------------------------------
200 int server_node_free( server_node* node );
203 // ----------------------------------------------------------------------
204 // Deallocates a jabber_connect node
205 // ----------------------------------------------------------------------
206 int jabber_connect_free( jabber_connect* jabber );
208 // ----------------------------------------------------------------------
209 // Deallocates the memory used by the router_registrar. This will also call
210 // server_class_node_free on any attached server_class_nodes.
211 // ----------------------------------------------------------------------
212 int router_registrar_free( transport_router_registrar* router_registrar );
215 // ----------------------------------------------------------------------
216 // Returns the server_node with the given Jabber remote_id
217 // ----------------------------------------------------------------------
218 server_node * find_server_node ( server_class_node * class, const char * remote_id );
221 // ----------------------------------------------------------------------
222 // Returns the server_class_node object with the given class_name
223 // ----------------------------------------------------------------------
224 server_class_node * find_server_class ( transport_router_registrar * router, const char * class_id );
226 // ----------------------------------------------------------------------
227 // Removes a server class from the top level router_registrar
228 // ----------------------------------------------------------------------
229 int unregister_server_node( server_class_node* active_class_node, char* remote_id );
231 int fill_fd_set( transport_router_registrar* router, fd_set* set );
233 void listen_loop( transport_router_registrar* router );
236 int router_return_server_info( transport_router_registrar* router, transport_message* msg );
238 int remove_server_class( transport_router_registrar* router, server_class_node* class );
242 int router_registrar_handle_app_request( transport_router_registrar*, transport_message* msg );
244 osrf_message* router_registrar_process_app_request(
245 transport_router_registrar* , osrf_message* omsg );
248 // ----------------------------------------------------------------------
249 // Adds a handler for the SIGUSR1 that we send to wake all the
250 // listening threads.
251 // ----------------------------------------------------------------------
252 //void sig_handler( int sig );