1 #include "opensrf/transport_client.h"
2 #include "opensrf/transport_message.h"
3 #include "opensrf/osrf_message.h"
7 #include "osrf_config.h"
10 #include <sys/select.h>
15 #define ROUTER_MAX_TRUSTED 256
17 // ----------------------------------------------------------------------
18 // Jabber router_registrar/load balancer. There is a top level linked list of
19 // server_class_nodes. A server class represents the a cluster of Jabber
20 // clients that define a single logical routing endpoint. Each of these
21 // server_class_nodes maintains a list of connected server_nodes, which
22 // represents the pool of connected server endpoints. A request
23 // directed at a particular class is routed to the next available
26 // ----------------------------------------------------------------------
29 // ----------------------------------------------------------------------
30 // Defines an element in a server list. The server list is a circular
31 // doubly linked list. User is responsible for freeing a server_node with
33 // ----------------------------------------------------------------------
34 struct server_node_struct {
36 struct server_node_struct* next;
37 struct server_node_struct* prev;
39 time_t la_time; /* last time we sent a message to a server */
40 time_t reg_time; /* time we originally registered */
41 time_t upd_time; /* last re-register time */
42 int available; /* true if we may be used */
44 int serve_count; /* how many messages we've sent */
46 /* jabber remote id for this server node*/
49 /* we cache the last sent message in case our remote
50 endpoint has gone away. If it has, the next server
51 node in the list will re-send our last message */
52 transport_message* last_sent;
55 typedef struct server_node_struct server_node;
58 // ----------------------------------------------------------------------
59 // Models a basic jabber connection structure. Any component that
60 // connects to jabber will have one of these.
61 // ----------------------------------------------------------------------
62 struct jabber_connect_struct {
71 transport_client* t_client;
73 typedef struct jabber_connect_struct jabber_connect;
77 // ----------------------------------------------------------------------
78 // Defines an element in the list of server classes. User is
79 // responsible for freeing a server_class_node with
80 // server_class_node_free().
81 // The server_node_list is a doubly (not circular) linked list
82 // ----------------------------------------------------------------------
83 struct server_class_node_struct {
85 /* the name of our class. This will be used as the jabber
86 resource when we create a class level connection*/
89 /* the current node in the ring of available server nodes */
90 server_node* current_server_node;
92 /* next and prev class_node pointers */
93 struct server_class_node_struct* next;
94 struct server_class_node_struct* prev;
96 /* our jabber connection struct */
97 jabber_connect* jabber;
100 typedef struct server_class_node_struct server_class_node;
103 // ----------------------------------------------------------------------
104 // Top level router_registrar object. Maintains the list of
105 // server_class_nodes and the top level router jabber connection.
106 // ----------------------------------------------------------------------
107 struct transport_router_registrar_struct {
109 /* the list of server class nodes */
110 server_class_node* server_class_list;
112 /* if we don't hear from the client in this amount of time
113 we consider them dead... */
114 /* not currently used */
115 int client_timeout; /* seconds */
117 /* our top level connection to the jabber server */
118 jabber_connect* jabber;
120 /* true if we connect to jabber as a jabber component */
123 char** trusted_servers;
124 char** trusted_clients;
128 typedef struct transport_router_registrar_struct transport_router_registrar;
131 // ----------------------------------------------------------------------
132 // Returns an allocated transport_router_registrar. The user is responsible for
133 // freeing the allocated memory with router_registrar_free()
134 // client_timeout is unused at this time.
135 // connect_timeout is how long we will wait for a failed jabber connect
136 // attempt for the top level connection.
137 // ----------------------------------------------------------------------
138 transport_router_registrar* router_registrar_init( char* server,
139 int port, char* username, char* password, char* resource,
140 int client_timeout, int connect_timeout, int component );
142 // ----------------------------------------------------------------------
143 // Connects the top level router_registrar object to the Jabber server.
144 // ----------------------------------------------------------------------
145 int router_registrar_connect( transport_router_registrar* router );
147 // ----------------------------------------------------------------------
148 // Connects the given jabber_connect object to the Jabber server
149 // ----------------------------------------------------------------------
150 int j_connect( jabber_connect* jabber );
153 // ----------------------------------------------------------------------
154 // Builds and initializes a jabber_connect object. User is responsible
155 // for freeing the memory with jabber_connect_free();
156 // ----------------------------------------------------------------------
157 jabber_connect* jabber_connect_init( char* server,
158 int port, char* username, char* password,
159 char* resource, int connect_timeout, int component );
161 // ----------------------------------------------------------------------
162 // Allocates and initializes a server class instance. This will be
163 // called when a new class message arrives. It will connect to Jabber
164 // as router_registrar->username@router_registrar->server/new_class
165 // ----------------------------------------------------------------------
166 server_class_node* init_server_class(
167 transport_router_registrar* router_registrar, char* remote_id, char* server_class );
169 // ----------------------------------------------------------------------
170 // Allocates and initializes a server_node object. The object must
171 // be freed with server_node_free().
172 // remote_id is the full jabber login for the remote server connection
173 // I.e. where we send messages when we want to send them to this
175 // ----------------------------------------------------------------------
176 server_node* init_server_node( char* remote_id );
179 // ----------------------------------------------------------------------
180 // Routes messages sent to the provided server_class_node's class
181 // ----------------------------------------------------------------------
182 int server_class_handle_msg( transport_router_registrar* router,
183 server_class_node* s_node, transport_message* msg );
185 // ----------------------------------------------------------------------
186 // Determines what to do with an inbound register/unregister message.
187 // ----------------------------------------------------------------------
188 int router_registrar_handle_msg( transport_router_registrar*, transport_message* msg );
190 // ----------------------------------------------------------------------
191 // Deallocates the memory occupied by the given server_node
192 // ----------------------------------------------------------------------
193 int server_node_free( server_node* node );
195 // ----------------------------------------------------------------------
196 // Deallocates the memory used by the given server_class_node. This
197 // will also free any attached server_node's.
198 // ----------------------------------------------------------------------
199 int server_class_node_free( server_class_node* node );
201 // ----------------------------------------------------------------------
202 // Deallocates the memory used by a server_node
203 // ----------------------------------------------------------------------
204 int server_node_free( server_node* node );
207 // ----------------------------------------------------------------------
208 // Deallocates a jabber_connect node
209 // ----------------------------------------------------------------------
210 int jabber_connect_free( jabber_connect* jabber );
212 // ----------------------------------------------------------------------
213 // Deallocates the memory used by the router_registrar. This will also call
214 // server_class_node_free on any attached server_class_nodes.
215 // ----------------------------------------------------------------------
216 int router_registrar_free( transport_router_registrar* router_registrar );
219 // ----------------------------------------------------------------------
220 // Returns the server_node with the given Jabber remote_id
221 // ----------------------------------------------------------------------
222 server_node * find_server_node ( server_class_node * class, const char * remote_id );
225 // ----------------------------------------------------------------------
226 // Returns the server_class_node object with the given class_name
227 // ----------------------------------------------------------------------
228 server_class_node * find_server_class ( transport_router_registrar * router, const char * class_id );
230 // ----------------------------------------------------------------------
231 // Removes a server class from the top level router_registrar
232 // ----------------------------------------------------------------------
233 int unregister_server_node( server_class_node* active_class_node, char* remote_id );
235 int fill_fd_set( transport_router_registrar* router, fd_set* set );
237 void listen_loop( transport_router_registrar* router );
240 int router_return_server_info( transport_router_registrar* router, transport_message* msg );
242 int remove_server_class( transport_router_registrar* router, server_class_node* class );
246 int router_registrar_handle_app_request( transport_router_registrar*, transport_message* msg );
248 osrf_message** router_registrar_process_app_request(
249 transport_router_registrar* , osrf_message* omsg, int* num_responses );
252 // ----------------------------------------------------------------------
253 // Adds a handler for the SIGUSR1 that we send to wake all the
254 // listening threads.
255 // ----------------------------------------------------------------------
256 //void sig_handler( int sig );