1 #include "opensrf/transport_client.h"
2 #include "opensrf/transport_message.h"
4 #include <sys/select.h>
9 #define ROUTER_MAX_TRUSTED 256
11 // ----------------------------------------------------------------------
12 // Jabber router_registrar/load balancer. There is a top level linked list of
13 // server_class_nodes. A server class represents the a cluster of Jabber
14 // clients that define a single logical routing endpoint. Each of these
15 // server_class_nodes maintains a list of connected server_nodes, which
16 // represents the pool of connected server endpoints. A request
17 // directed at a particular class is routed to the next available
20 // ----------------------------------------------------------------------
23 // ----------------------------------------------------------------------
24 // Defines an element in a server list. The server list is a circular
25 // doubly linked list. User is responsible for freeing a server_node with
27 // ----------------------------------------------------------------------
28 struct server_node_struct {
30 struct server_node_struct* next;
31 struct server_node_struct* prev;
33 time_t la_time; /* last time we sent a message to a server */
34 time_t reg_time; /* time we originally registered */
35 time_t upd_time; /* last re-register time */
36 int available; /* true if we may be used */
38 int serve_count; /* how many messages we've sent */
40 /* jabber remote id for this server node*/
43 /* we cache the last sent message in case our remote
44 endpoint has gone away. If it has, the next server
45 node in the list will re-send our last message */
46 transport_message* last_sent;
49 typedef struct server_node_struct server_node;
52 // ----------------------------------------------------------------------
53 // Models a basic jabber connection structure. Any component that
54 // connects to jabber will have one of these.
55 // ----------------------------------------------------------------------
56 struct jabber_connect_struct {
65 transport_client* t_client;
67 typedef struct jabber_connect_struct jabber_connect;
71 // ----------------------------------------------------------------------
72 // Defines an element in the list of server classes. User is
73 // responsible for freeing a server_class_node with
74 // server_class_node_free().
75 // The server_node_list is a doubly (not circular) linked list
76 // ----------------------------------------------------------------------
77 struct server_class_node_struct {
79 /* the name of our class. This will be used as the jabber
80 resource when we create a class level connection*/
83 /* the current node in the ring of available server nodes */
84 server_node* current_server_node;
86 /* next and prev class_node pointers */
87 struct server_class_node_struct* next;
88 struct server_class_node_struct* prev;
90 /* our jabber connection struct */
91 jabber_connect* jabber;
94 typedef struct server_class_node_struct server_class_node;
96 // ----------------------------------------------------------------------
97 // Top level router_registrar object. Maintains the list of
98 // server_class_nodes and the top level router jabber connection.
99 // ----------------------------------------------------------------------
100 struct transport_router_registrar_struct {
102 /* the list of server class nodes */
103 server_class_node* server_class_list;
105 /* if we don't hear from the client in this amount of time
106 we consider them dead... */
107 /* not currently used */
108 int client_timeout; /* seconds */
110 /* our top level connection to the jabber server */
111 jabber_connect* jabber;
113 /* true if we connect to jabber as a jabber component */
116 char** trusted_servers;
117 char** trusted_clients;
121 typedef struct transport_router_registrar_struct transport_router_registrar;
126 // ----------------------------------------------------------------------
127 // Returns an allocated transport_router_registrar. The user is responsible for
128 // freeing the allocated memory with router_registrar_free()
129 // client_timeout is unused at this time.
130 // connect_timeout is how long we will wait for a failed jabber connect
131 // attempt for the top level connection.
132 // ----------------------------------------------------------------------
133 transport_router_registrar* router_registrar_init( char* server,
134 int port, char* username, char* password, char* resource,
135 int client_timeout, int connect_timeout, int component );
137 // ----------------------------------------------------------------------
138 // Connects the top level router_registrar object to the Jabber server.
139 // ----------------------------------------------------------------------
140 int router_registrar_connect( transport_router_registrar* router );
142 // ----------------------------------------------------------------------
143 // Connects the given jabber_connect object to the Jabber server
144 // ----------------------------------------------------------------------
145 int j_connect( jabber_connect* jabber );
148 // ----------------------------------------------------------------------
149 // Builds and initializes a jabber_connect object. User is responsible
150 // for freeing the memory with jabber_connect_free();
151 // ----------------------------------------------------------------------
152 jabber_connect* jabber_connect_init( char* server,
153 int port, char* username, char* password,
154 char* resource, int connect_timeout, int component );
156 // ----------------------------------------------------------------------
157 // Allocates and initializes a server class instance. This will be
158 // called when a new class message arrives. It will connect to Jabber
159 // as router_registrar->username@router_registrar->server/new_class
160 // ----------------------------------------------------------------------
161 server_class_node* init_server_class(
162 transport_router_registrar* router_registrar, char* remote_id, char* server_class );
164 // ----------------------------------------------------------------------
165 // Allocates and initializes a server_node object. The object must
166 // be freed with server_node_free().
167 // remote_id is the full jabber login for the remote server connection
168 // I.e. where we send messages when we want to send them to this
170 // ----------------------------------------------------------------------
171 server_node* init_server_node( char* remote_id );
174 // ----------------------------------------------------------------------
175 // Routes messages sent to the provided server_class_node's class
176 // ----------------------------------------------------------------------
177 int server_class_handle_msg( transport_router_registrar* router,
178 server_class_node* s_node, transport_message* msg );
180 // ----------------------------------------------------------------------
181 // Determines what to do with an inbound register/unregister message.
182 // ----------------------------------------------------------------------
183 int router_registrar_handle_msg( transport_router_registrar*, transport_message* msg );
185 // ----------------------------------------------------------------------
186 // Deallocates the memory occupied by the given server_node
187 // ----------------------------------------------------------------------
188 int server_node_free( server_node* node );
190 // ----------------------------------------------------------------------
191 // Deallocates the memory used by the given server_class_node. This
192 // will also free any attached server_node's.
193 // ----------------------------------------------------------------------
194 int server_class_node_free( server_class_node* node );
196 // ----------------------------------------------------------------------
197 // Deallocates the memory used by a server_node
198 // ----------------------------------------------------------------------
199 int server_node_free( server_node* node );
202 // ----------------------------------------------------------------------
203 // Deallocates a jabber_connect node
204 // ----------------------------------------------------------------------
205 int jabber_connect_free( jabber_connect* jabber );
207 // ----------------------------------------------------------------------
208 // Deallocates the memory used by the router_registrar. This will also call
209 // server_class_node_free on any attached server_class_nodes.
210 // ----------------------------------------------------------------------
211 int router_registrar_free( transport_router_registrar* router_registrar );
214 // ----------------------------------------------------------------------
215 // Returns the server_node with the given Jabber remote_id
216 // ----------------------------------------------------------------------
217 server_node * find_server_node ( server_class_node * class, const char * remote_id );
220 // ----------------------------------------------------------------------
221 // Returns the server_class_node object with the given class_name
222 // ----------------------------------------------------------------------
223 server_class_node * find_server_class ( transport_router_registrar * router, const char * class_id );
225 // ----------------------------------------------------------------------
226 // Removes a server class from the top level router_registrar
227 // ----------------------------------------------------------------------
228 int unregister_server_node( server_class_node* active_class_node, char* remote_id );
230 int fill_fd_set( transport_router_registrar* router, fd_set* set );
232 void listen_loop( transport_router_registrar* router );
235 int router_return_server_info( transport_router_registrar* router, transport_message* msg );
237 int remove_server_class( transport_router_registrar* router, server_class_node* class );
238 // ----------------------------------------------------------------------
239 // Adds a handler for the SIGUSR1 that we send to wake all the
240 // listening threads.
241 // ----------------------------------------------------------------------
242 //void sig_handler( int sig );