-/*
- * vim:ts=2:sw=2:noexpandtab
+/*
+ * vim:ts=2:sw=2:expandtab
*/
-#include "chord.h"
+#include <stdio.h>
+#include "xbt/sysdep.h"
+#include "gras.h"
+
+static int closest_preceding_node(int id);
+static void check_predecessor(void);
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(chord,"Messages specific to this example");
+
+typedef enum msg_typus{
+ PING,
+ PONG,
+ GET_PRE,
+ REP_PRE,
+ GET_SUC,
+ REP_SUC,
+ STD,
+}msg_typus;
+
+/*GRAS_DEFINE_TYPE(s_pbio,
+ struct s_pbio{
+ msg_typus type;
+ int dest;
+ char msg[1024];
+ };
+);
+typedef struct s_pbio pbio_t;*/
+
+/*GRAS_DEFINE_TYPE(s_ping,*/
+ struct s_ping{
+ int id;
+ };
+/*);*/
+typedef struct s_ping ping_t;
+
+/*GRAS_DEFINE_TYPE(s_pong,*/
+ struct s_pong{
+ int id;
+ int failed;
+ };
+/*);*/
+typedef struct s_pong pong_t;
+
+GRAS_DEFINE_TYPE(s_notify,
+ struct s_notify{
+ int id;
+ char host[1024];
+ int port;
+ };
+);
+typedef struct s_notify notify_t;
+
+GRAS_DEFINE_TYPE(s_get_suc,
+ struct s_get_suc{
+ int id;
+ };
+);
+typedef struct s_get_suc get_suc_t;
+
+GRAS_DEFINE_TYPE(s_rep_suc,
+ struct s_rep_suc{
+ int id;
+ char host[1024];
+ int port;
+ };
+);
+typedef struct s_rep_suc rep_suc_t;
+
+typedef struct finger_elem{
+ int id;
+ char host[1024];
+ int port;
+}finger_elem;
+
+
static void register_messages(){
-/* gras_msgtype_declare("chord",gras_datadesc_by_symbol(s_pbio));*/
- gras_msgtype_declare("chord_get_suc",gras_datadesc_by_symbol(s_get_suc));
- gras_msgtype_declare("chord_rep_suc",gras_datadesc_by_symbol(s_rep_suc));
+/* gras_msgtype_declare("chord",gras_datadesc_by_symbol(s_pbio));*/
+ gras_msgtype_declare("chord_get_suc",gras_datadesc_by_symbol(s_get_suc));
+ gras_msgtype_declare("chord_rep_suc",gras_datadesc_by_symbol(s_rep_suc));
+ gras_msgtype_declare("chord_notify",gras_datadesc_by_symbol(s_notify));
}
/* Global private data */
typedef struct{
- gras_socket_t sock; /* server socket on which I'm listening */
- int id; /* my id number */
- char host[1024]; /* my host name */
- int port; /* port on which I'm listening FIXME */
- int fingers; /* how many fingers */
- finger_elem *finger; /* finger table */
- char pre_host[1024]; /* predecessor host */
- int pre_port; /* predecessor port */
+ gras_socket_t sock; /* server socket on which I'm listening */
+ int id; /* my id number */
+ char host[1024]; /* my host name */
+ int port; /* port on which I'm listening FIXME */
+ int fingers; /* how many fingers */
+ finger_elem *finger; /* finger table */
+ int next_to_fix; /* next in the finger list to be checked */
+ int pre_id; /* predecessor id */
+ char pre_host[1024]; /* predecessor host */
+ int pre_port; /* predecessor port */
}node_data_t;
int node(int argc,char **argv);
/*static int node_cb_chord_handler(gras_socket_t expeditor,void *payload_data){
- xbt_ex_t e;
- pbio_t pbio_i=*(pbio_t*)payload_data;
+ xbt_ex_t e;
+ pbio_t pbio_i=*(pbio_t*)payload_data;
- node_data_t *globals=(node_data_t*)gras_userdata_get();
+ node_data_t *globals=(node_data_t*)gras_userdata_get();
- INFO4(">>> %d : received %d message from %s to %d <<<",globals->id,pbio_i.type,gras_socket_peer_name(expeditor),pbio_i.dest);
+ INFO4(">>> %d : received %d message from %s to %d <<<",globals->id,pbio_i.type,gras_socket_peer_name(expeditor),pbio_i.dest);
}*/
-static int node_cb_get_suc_handler(gras_socket_t expeditor,void *payload_data){
- xbt_ex_t e;
- get_suc_t incoming=*(get_suc_t*)payload_data;
- rep_suc_t outgoing;
- node_data_t *globals=(node_data_t*)gras_userdata_get();
- INFO2("Received a get_successor message from %s for %d",gras_socket_peer_name(expeditor),incoming.id);
- if((globals->id==globals->finger[0].id)||(incoming.id>globals->id&&incoming.id<=globals->finger[0].id)){
- outgoing.id=globals->finger[0].id;
- snprintf(outgoing.host,1024,globals->finger[0].host);
- outgoing.port=globals->finger[0].port;
- INFO0("My successor is his successor!");
- }else{
- gras_socket_t temp_sock;
- int contact=closest_preceding_node(incoming.id);
- get_suc_t asking;asking.id=incoming.id;
- TRY{
- temp_sock=gras_socket_client(globals->finger[contact].host,globals->finger[contact].port);
- }CATCH(e){
- RETHROW0("Unable to connect!");
- }
- TRY{
- gras_msg_send(temp_sock,gras_msgtype_by_name("chord_get_suc"),&asking);
- }CATCH(e){
- RETHROW0("Unable to ask!");
- }
- gras_msg_wait(10.0,gras_msgtype_by_name("chord_rep_suc"),&temp_sock,&outgoing);
- }
-
- TRY{
- gras_msg_send(expeditor,gras_msgtype_by_name("chord_rep_suc"),&outgoing);
- INFO0("Successor information sent!");
- }CATCH(e){
- RETHROW2("%s:Timeout sending successor information to %s",globals->host,gras_socket_peer_name(expeditor));
- }
- gras_socket_close(expeditor);
- return(1);
+static int node_cb_get_suc_handler(gras_msg_cb_ctx_t ctx,void *payload_data){
+ gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
+ xbt_ex_t e;
+ get_suc_t incoming=*(get_suc_t*)payload_data;
+ rep_suc_t outgoing;
+ node_data_t *globals=(node_data_t*)gras_userdata_get();
+ INFO2("Received a get_successor message from %s for %d",
+ gras_socket_peer_name(expeditor),incoming.id);
+ if((globals->id==globals->finger[0].id)||
+ (incoming.id>globals->id&&incoming.id<=globals->finger[0].id)){
+ outgoing.id=globals->finger[0].id;
+ snprintf(outgoing.host,1024,globals->finger[0].host);
+ outgoing.port=globals->finger[0].port;
+ INFO0("My successor is his successor!");
+ }else{
+ gras_socket_t temp_sock;
+ int contact=closest_preceding_node(incoming.id);
+ if(contact==-1){
+ outgoing.id=globals->finger[0].id;
+ snprintf(outgoing.host,1024,globals->finger[0].host);
+ outgoing.port=globals->finger[0].port;
+ INFO0("My successor is his successor!");
+ }else{
+ get_suc_t asking;asking.id=incoming.id;
+ TRY{
+ temp_sock=gras_socket_client(globals->finger[contact].host,
+ globals->finger[contact].port);
+ }CATCH(e){
+ RETHROW0("Unable to connect!: %s");
+ }
+ TRY{
+ gras_msg_send(temp_sock,"chord_get_suc",&asking);
+ }CATCH(e){
+ RETHROW0("Unable to ask!: %s");
+ }
+ gras_msg_wait(10.,"chord_rep_suc",&temp_sock, &outgoing);
+ }
+ }
+
+ TRY{
+ gras_msg_send(expeditor,"chord_rep_suc",&outgoing);
+ INFO0("Successor information sent!");
+ }CATCH(e){
+ RETHROW2("%s:Timeout sending successor information to %s: %s",
+ globals->host,gras_socket_peer_name(expeditor));
+ }
+ gras_socket_close(expeditor);
+ return 0;
+}
+
+static int closest_preceding_node(int id){
+ node_data_t *globals=(node_data_t*)gras_userdata_get();
+ int i;
+ for(i=globals->fingers-1;i>=0;i--){
+ if(globals->finger[i].id>globals->id&&globals->finger[i].id<id){
+ return(i);
+ }
+ }
+
+ return i;
+}
+
+static int node_cb_notify_handler(gras_msg_cb_ctx_t ctx,void *payload_data){
+ gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
+ /*xbt_ex_t e;*/
+ notify_t incoming=*(notify_t*)payload_data;
+ node_data_t *globals=(node_data_t*)gras_userdata_get();
+ INFO2("Received a notifying message from %s as %d",
+ gras_socket_peer_name(expeditor),incoming.id);
+ if(globals->pre_id==-1||
+ (incoming.id>globals->pre_id&&incoming.id<globals->id)){
+ globals->pre_id=incoming.id;
+ snprintf(globals->pre_host,1024,incoming.host);
+ globals->pre_port=incoming.port;
+ INFO0("Set as my new predecessor!");
+ }
+ return 0;
}
-int closest_preceding_node(int id){
- node_data_t *globals=(node_data_t*)gras_userdata_get();
- int i;
- for(i=globals->fingers-1;i>=0;i--){
- if(globals->finger[i].id>globals->id&&globals->finger[i].id<id){
- return(i);
- }
- return(i);
- }
+static void fix_fingers(){
+ get_suc_t get_suc_msg;
+ xbt_ex_t e;
+ gras_socket_t temp_sock=NULL;
+ gras_socket_t temp_sock2=NULL;
+ rep_suc_t rep_suc_msg;
+ node_data_t *globals=(node_data_t*)gras_userdata_get();
+
+ TRY{
+ temp_sock=gras_socket_client(globals->host,globals->port);
+ }CATCH(e){
+ RETHROW0("Unable to contact known host: %s");
+ }
+
+ get_suc_msg.id=globals->id;
+ TRY{
+ gras_msg_send(temp_sock,"chord_get_suc",&get_suc_msg);
+ }CATCH(e){
+ gras_socket_close(temp_sock);
+ RETHROW0("Unable to contact known host to get successor!: %s");
+ }
+
+ TRY{
+ INFO0("Waiting for reply!");
+ gras_msg_wait(6000,"chord_rep_suc",&temp_sock2, &rep_suc_msg);
+ }CATCH(e){
+ RETHROW1("%s: Error waiting for successor:%s",globals->host);
+ }
+ globals->finger[0].id=rep_suc_msg.id;
+ snprintf(globals->finger[0].host,1024,rep_suc_msg.host);
+ globals->finger[0].port=rep_suc_msg.port;
+ INFO1("→ Finger %d fixed!",globals->next_to_fix);
+ gras_socket_close(temp_sock);
+
+ globals->next_to_fix=(++globals->next_to_fix==globals->fingers)?
+ 0:globals->next_to_fix;
}
+static void check_predecessor(){
+ node_data_t *globals = (node_data_t*)gras_userdata_get();
+ gras_socket_t temp_sock;
+ ping_t ping;
+ pong_t pong;
+ xbt_ex_t e;
+ if (globals->pre_id == -1){
+ return;
+ }
+ TRY{
+ temp_sock = gras_socket_client( globals->pre_host, globals->pre_port );
+ }CATCH(e){
+ globals->pre_id = -1;
+ globals->pre_host[0] = 0;
+ globals->pre_port = 0;
+ }
-void check_predecessor()
-{
-node_data_t *globals = (node_data_t*)gras_userdata_get();
-gras_socket_t temp_sock;
-if (globals->pre_host[0] == 0)
- {
- return;
- }
-TRY
- {
- temp_sock = gras_socket_client( globals->pre_host, globals->pre_port );
- }
-CATCH(e)
- {
- globals->pre_host[0] = 0;
- globals->pre_port = 0;
- }
-ping_t ping_kong;
-pong_t king_pong;
-ping_kong->id = 0;
-TRY
- {
- gras_msg_send( temp_sock, gras_msgtype_by_name("chord_ping"),&ping_kong);
- }
-CATCH(e)
- {
- globals->pre_host[0] = 0;
- globals->pre_port = 0;
- }
-TRY
- {
- gras_msg_wait( 6969, gras_msgtype_by_name("chord_pong"), &temp_sock, &king_pong);
- }
-CATCH(e)
- {
- globals->pre_host[0] = 0;
- globals->pre_port = 0;
- }
-gras_socket_close(temp_sock);
+ ping.id = 0;
+ TRY{
+ gras_msg_send( temp_sock, "chord_ping",&ping);
+ }CATCH(e){
+ globals->pre_id = -1;
+ globals->pre_host[0] = 0;
+ globals->pre_port = 0;
+ }
+ TRY{
+ gras_msg_wait( 60, "chord_pong", &temp_sock, &pong);
+ }CATCH(e){
+ globals->pre_id = -1;
+ globals->pre_host[0] = 0;
+ globals->pre_port = 0;
+ }
+ gras_socket_close(temp_sock);
}
int node(int argc,char **argv){
- node_data_t *globals=NULL;
- gras_socket_t temp_sock,temp_sock2;
-
- xbt_ex_t e;
-
- int create=0;
- int other_port;
- char *other_host;
-
- /* 1. Init the GRAS infrastructure and declare my globals */
- gras_init(&argc,argv);
- globals=gras_userdata_new(node_data_t);
-
- globals->id=atoi(argv[1]);
- globals->port=atoi(argv[2]);
- globals->fingers=0;
- globals->finger=NULL;
- globals->pre_host[0]=0;
- globals->pre_port=-1;
-
- snprintf(globals->host,1024,gras_os_myname());
-
- if(argc==3){
- create=1;
- }else{
- other_host=strndup(argv[3],1024);
- other_port=atoi(argv[4]);
- }
-
- globals->sock=gras_socket_server(globals->port);
- gras_os_sleep(1.0);
-
- register_messages();
- register_messages();
-
- globals->finger=(finger_elem*)calloc(1,sizeof(finger_elem));
- INFO2("Launching node %s:%d",globals->host,globals->port);
- if(create){
- INFO0("→Creating ring");
- globals->finger[0].id=globals->id;
- snprintf(globals->finger[0].host,1024,globals->host);
- globals->finger[0].port=globals->port;
- }else{
- INFO2("→Known node %s:%d",other_host,other_port);
- INFO0("→Contacting to determine successor");
- TRY{
- temp_sock=gras_socket_client(other_host,other_port);
- }CATCH(e){
- RETHROW0("Unable to contact known host!");
- }
- get_suc_t get_suc_msg;get_suc_msg.id=globals->id;
- TRY{
- gras_msg_send(temp_sock,gras_msgtype_by_name("chord_get_suc"),&get_suc_msg);
- }CATCH(e){
- gras_socket_close(temp_sock);
- RETHROW0("Unable to contact known host to get successor!");
- }
- rep_suc_t rep_suc_msg;
- TRY{
- INFO0("Waiting for reply!");
- gras_msg_wait(6000,gras_msgtype_by_name("chord_rep_suc"),&temp_sock2,&rep_suc_msg);
- }CATCH(e){
- RETHROW2("%s: Error waiting for successor:%s",globals->host,e.msg);
- }
- globals->finger[0].id=rep_suc_msg.id;
- snprintf(globals->finger[0].host,1024,rep_suc_msg.host);
- globals->finger[0].port=rep_suc_msg.port;
- INFO3("→Got successor : %d-%s:%d",globals->finger[0].id,globals->finger[0].host,globals->finger[0].port);
- gras_socket_close(temp_sock);
- }
-
- gras_cb_register(gras_msgtype_by_name("chord_get_suc"),&node_cb_get_suc_handler);
-// gras_cb_register(gras_msgtype_by_name("chord_ping"),&node_cb_ping_handler);
-
- gras_msg_handle(60.0);
-
- gras_socket_close(globals->sock);
- free(globals);
- gras_exit();
- INFO0("Done");
- return(0);
+ node_data_t *globals=NULL;
+ gras_socket_t temp_sock=NULL;
+ gras_socket_t temp_sock2=NULL;
+ get_suc_t get_suc_msg;
+ rep_suc_t rep_suc_msg;
+
+ xbt_ex_t e;
+
+ int create=0;
+ int other_port=-1;
+ char *other_host;
+ notify_t notify_msg;
+ int l;
+
+ /* 1. Init the GRAS infrastructure and declare my globals */
+ gras_init(&argc,argv);
+
+ gras_os_sleep((15-gras_os_getpid())*20);
+
+ globals=gras_userdata_new(node_data_t);
+
+ globals->id=atoi(argv[1]);
+ globals->port=atoi(argv[2]);
+ globals->fingers=0;
+ globals->finger=NULL;
+ globals->pre_id=-1;
+ globals->pre_host[0]=0;
+ globals->pre_port=-1;
+
+ snprintf(globals->host,1024,gras_os_myname());
+
+ if(argc==3){
+ create=1;
+ }else{
+ asprintf(&other_host,"%s",argv[3]);
+ other_port=atoi(argv[4]);
+ }
+
+ globals->sock=gras_socket_server(globals->port);
+ gras_os_sleep(1.0);
+
+ register_messages();
+
+ globals->finger=(finger_elem*)calloc(1,sizeof(finger_elem));
+ INFO2("Launching node %s:%d",globals->host,globals->port);
+ if(create){
+ INFO0("→Creating ring");
+ globals->finger[0].id=globals->id;
+ snprintf(globals->finger[0].host,1024,globals->host);
+ globals->finger[0].port=globals->port;
+ }else{
+ INFO2("→Known node %s:%d",other_host,other_port);
+ INFO0("→Contacting to determine successor");
+ TRY{
+ temp_sock=gras_socket_client(other_host,other_port);
+ }CATCH(e){
+ RETHROW0("Unable to contact known host: %s");
+ }
+
+ get_suc_msg.id=globals->id;
+ TRY{
+ gras_msg_send(temp_sock,"chord_get_suc", &get_suc_msg);
+ }CATCH(e){
+ gras_socket_close(temp_sock);
+ RETHROW0("Unable to contact known host to get successor!: %s");
+ }
+
+ TRY{
+ INFO0("Waiting for reply!");
+ gras_msg_wait(10.,"chord_rep_suc",&temp_sock2, &rep_suc_msg);
+ }CATCH(e){
+ RETHROW1("%s: Error waiting for successor:%s",globals->host);
+ }
+ globals->finger[0].id=rep_suc_msg.id;
+ snprintf(globals->finger[0].host,1024,rep_suc_msg.host);
+ globals->finger[0].port=rep_suc_msg.port;
+ INFO3("→Got successor : %d-%s:%d",globals->finger[0].id,
+ globals->finger[0].host,globals->finger[0].port);
+ gras_socket_close(temp_sock);
+ TRY{
+ temp_sock=gras_socket_client(globals->finger[0].host,
+ globals->finger[0].port);
+ }CATCH(e){
+ RETHROW0("Unable to contact successor: %s");
+ }
+
+ notify_msg.id=globals->id;
+ snprintf(notify_msg.host,1024,globals->host);
+ notify_msg.port=globals->port;
+ TRY{
+ gras_msg_send(temp_sock,"chord_notify",¬ify_msg);
+ }CATCH(e){
+ RETHROW0("Unable to notify successor! %s");
+ }
+ }
+
+ gras_cb_register("chord_get_suc", &node_cb_get_suc_handler);
+ gras_cb_register("chord_notify", &node_cb_notify_handler);
+ /*gras_cb_register("chord_ping",&node_cb_ping_handler);*/
+ /* gras_timer_repeat(600.,fix_fingers);*/
+ /*while(1){*/
+
+ for(l=0;l<50;l++){
+ TRY{
+ gras_msg_handle(6000000.0);
+ }CATCH(e){
+ }
+ }
+ /*}*/
+
+ gras_socket_close(globals->sock);
+ free(globals);
+ gras_exit();
+ INFO0("Done");
+ return(0);
}
