/*-----------------*/ void DLL_RESYNCcmd(void *tag, void *msgv, int *size) {
char errmsg[200];
char *msg= (char *)msgv; int rc;
sprintf(errmsg, "DLL_RESYNCcmd: tag:%d size:%d msg:%5.5s\n",
*(int *)tag, *size, msg); prtLog(errmsg);
rc= authenticate("");
//rc=0;
if(rc!=0) {
//sprintf(errmsg, "DLL_RESYNC not authenticated, but executed");prtLog(errmsg);
char clientid[100];
getclientid(clientid);
sprintf(errmsg, "DLL_RESYNC not allowed from client %s", clientid);prtLog(errmsg);
};
checkstartthread(0);
/*
if(clocktran!=0) {
sprintf(errmsg, "newclock thread already started. Trigger expert should restart ttcmidim and miclock client!"); prtLog(errmsg);
infolog_trgboth(LOG_FATAL, errmsg);
return;
};
clocktran=3; strcpy(clocktransition,"3"); newclocktag=0; GetMicSec(&clocktran_s, &clocktran_u);
sprintf(errmsg, "newclock thread DLL_RESYNC starting. tag:%d \n", newclocktag); prtLog(errmsg);
dim_start_thread(newclock, (void *)&newclocktag);
*/
}
/*----------------------------------------------------------- MICLOCKcaba
*/
void MICLOCKcaba(void *tag, void **msgpv, int *size, int *blabla) {
char **msgp= (char **)msgpv; int rc;
char msg[100], clientid[100];
// readVME:
getclocknow();
rc= getclientid(clientid);
*msgp= clocknow;
*size= strlen(clocknow)+1;
sprintf(msg, "MICLOCKcaba clocknow:%s size:%d clientid:%s rc:%d",
clocknow, *size, clientid, rc); prtLog(msg);
}
int main(void) {
struct addrinfo hints, *directory_info, *p;
int phase1_socket, phase2_socket;
int rv, bc, i, k;
socklen_t fromlen;
struct sockaddr_storage file_addr;
char buffer[MAX_DATA_SIZE];
struct hostent *he;
struct in_addr **addr_list;
char *host_addr;
FILE *fp;
struct fileserverinfo fileserver_list[FILE_SERVER_COUNT];
struct clientinfo client_list[CLIENT_COUNT];
/*************************************************** Phase 1 ***************************************************/
// remove directory.txt first
remove(DIRECTORY_TXT);
// get host addr
he = gethostbyname(HOST_NAME);
addr_list = (struct in_addr **)he->h_addr_list;
for(i = 0; addr_list[i] != NULL; i++) {
host_addr = inet_ntoa(*addr_list[i]);
}
// get host info, make socket, bind it to port 21537
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC; // use IPv4 or IPv6, whichever
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_PASSIVE; // use my IP
if((rv = getaddrinfo(NULL, DIRECTORY_PHASE1_PORT, &hints, &directory_info)) != 0) {
fprintf(stderr, "Error: phase 1 getaddrinfo %s\n", gai_strerror(rv));
return 1;
}
// loop through all the results and bind to the first we can
for(p = directory_info; p != NULL; p = p->ai_next) {
if ((phase1_socket = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
perror("Error: phase 1 directory server socket");
continue;
}
if (bind(phase1_socket, p->ai_addr, p->ai_addrlen) == -1) {
close(phase1_socket);
perror("Error: phase 1 directory server bind");
continue;
}
break;
}
if (p == NULL) {
fprintf(stderr, "Error: phase 1 directory server failed to bind socket\n");
return 2;
}
freeaddrinfo(directory_info);
printf("Phase 1: The Directory Server has UDP port number %s and IP address %s.\n", DIRECTORY_PHASE1_PORT, host_addr);
i = 0;
while(i++ < FILE_SERVER_COUNT) { // waiting for 3 file_server process
// no need to accept(), just recvfrom():
fromlen = sizeof file_addr;
if((bc = recvfrom(phase1_socket, buffer, sizeof buffer, 0, (struct sockaddr *)&file_addr, &fromlen)) == -1) {
perror("Error: phase 1 directory server recvfrom");
exit(1);
}
buffer[bc] = '\0';
char file_server_id[10]; // file server id
char file_server_name[20]; // file server name
char file_server_port[10]; // file server port
getfileserverid(buffer, file_server_id);
int sid = atoi(file_server_id) - 1;
getfileservername(buffer, file_server_name);
getfileserverport(buffer, file_server_port);
// store file server info into struct
strncpy(fileserver_list[sid].file_server_id, file_server_id, strlen(file_server_id)+1);
strncpy(fileserver_list[sid].file_server_name, file_server_name, strlen(file_server_name)+1);
strncpy(fileserver_list[sid].file_server_port, file_server_port, strlen(file_server_port)+1);
fileserver_list[sid].docfile = NULL;
printf("Phase 1: The Directory Server has received request from File Server %s.\n",file_server_id);
// write directory.txt
fp = fopen(DIRECTORY_TXT, "a");
fputs(buffer, fp);
fputs("\n", fp);
fclose(fp);
}
close(phase1_socket);
printf("Phase 1: The directory.txt file has been created.\n");
/*************************************************** Phase 2 ***************************************************/
// load resource.txt
fp = fopen(RESOURCE_TXT, "rt"); // open file for reading text
while(fgets(buffer, MAX_DATA_SIZE, fp) != NULL) {
// remove '\n\r'
int length = strlen(buffer)-1;
if (buffer[length] == '\n') buffer[--length] = '\0';
if (buffer[length] == '\r') buffer[--length] = '\0';
// printf("%s\n", buffer);
// File_Server1 2 doc1 doc2
char file_server_id[10]; // file server id
getfileserverid(buffer, file_server_id);
int sid = atoi(file_server_id) - 1;
char *ptr = strtok(buffer, " ");
i = 0;
while(ptr) {
// skip file server name and number
if(i++ < 2) {
ptr = strtok(NULL, " ");
continue;
}
// printf("%s\n", ptr);
// need malloc
struct docfileinfo *docfile = (struct docfileinfo *) malloc (sizeof(struct docfileinfo));
// store doc file server into file server
strncpy(docfile->doc_file_name, ptr, strlen(ptr)+1);
// printf("%s\n", docfile->doc_file_name);
// set corresponding file server's doc file
docfile->next_file = fileserver_list[sid].docfile;
fileserver_list[sid].docfile = docfile;
// printf("%s\n", fileserver_list[sid].docfile->doc_file_name);
ptr = strtok(NULL, " ");
}
}
fclose(fp);
// for(i = 0; i < FILE_SERVER_COUNT; i++) {
// printf("%s: ", fileserver_list[i].file_server_name);
// struct docfileinfo *pdoc = fileserver_list[i].docfile;
// while(pdoc != NULL) {
// printf("%s ", pdoc->doc_file_name);
// pdoc = pdoc->next_file;
// }
// printf("\n");
// }
// load topology.txt
fp = fopen(TOPOLOGY_TXT, "rt"); // open file for reading text
i = 0;
while(fgets(buffer, MAX_DATA_SIZE, fp) != NULL) {
// remove '\n\r'
int length = strlen(buffer)-1;
if (buffer[length] == '\n') buffer[--length] = '\0';
if (buffer[length] == '\r') buffer[--length] = '\0';
// printf("%s\n", buffer);
char *ptr = strtok(buffer, " ");
k = 0;
while(ptr) {
int cost = atoi(ptr);
client_list[i].to_file_server_cost[k++] = cost;
ptr = strtok(NULL, " ");
}
i++;
}
fclose(fp);
// for(i = 0; i < CLIENT_COUNT; i++) {
// int k;
// for(k = 0; k < FILE_SERVER_COUNT; k++) {
// printf("%d ", client_list[i].to_file_server_cost[k]);
// }
// printf("\n");
// }
// get host info, make socket, bind it to port 21537
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC; // use IPv4 or IPv6, whichever
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_PASSIVE; // use my IP
if((rv = getaddrinfo(NULL, DIRECTORY_PHASE2_PORT, &hints, &directory_info)) != 0) {
fprintf(stderr, "Error: phase 2 getaddrinfo %s\n", gai_strerror(rv));
return 1;
}
// loop through all the results and bind to the first we can
for(p = directory_info; p != NULL; p = p->ai_next) {
if ((phase2_socket = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
perror("Error: phase 2 directory server socket");
continue;
}
if (bind(phase2_socket, p->ai_addr, p->ai_addrlen) == -1) {
close(phase2_socket);
perror("Error: phase 2 directory server bind");
continue;
}
break;
}
if (p == NULL) {
fprintf(stderr, "Error: phase 2 directory server failed to bind socket\n");
return 2;
}
freeaddrinfo(directory_info);
printf("Phase 2: The Directory Server has UDP port number %s and IP address %s.\n", DIRECTORY_PHASE2_PORT, host_addr);
i = 0;
while(i++ < CLIENT_COUNT) {
// no need to accept(), just recvfrom():
fromlen = sizeof file_addr;
if((bc = recvfrom(phase2_socket, buffer, sizeof buffer, 0, (struct sockaddr *)&file_addr, &fromlen)) == -1) {
perror("Error: phase 2 directory server recvfrom");
exit(1);
}
buffer[bc] = '\0';
// printf("%s\n", buffer); // Client1 doc1
char client_id[10]; // client id
char client_name[20]; // client name
char request_file_name[10]; // request file
getclientid(buffer, client_id);
int cid = atoi(client_id) - 1;
getclientname(buffer, client_name);
getrequestfilename(buffer, request_file_name);
// printf("%s\n", request_file_name); // doc1
printf("Phase 2: The Directory Server has received request from Client %s.\n", client_id);
// search all the file server
int mincost = -1;
int contained_server_id;
for(k = 0; k < FILE_SERVER_COUNT; k++) {
struct docfileinfo *docfile = fileserver_list[k].docfile;
// search the file contained
// printf("request_file_name %s\n", request_file_name);
while(docfile) {
if(strcmp(docfile->doc_file_name, request_file_name) == 0) { // find the doc file
// printf("find in %s\n", fileserver_list[k].file_server_name);
// get client to server cost
int cost = client_list[cid].to_file_server_cost[k];
// printf("its cost is %d\n", cost);
// printf("%d\n", cost);
if(mincost == -1 || cost < mincost) { // find less cost server which contain that file
mincost = cost;
contained_server_id = k;
}
break;
}
docfile = docfile->next_file;
}
}
char response_message[MAX_DATA_SIZE];
memset(response_message, 0, sizeof response_message);
strcat(response_message, fileserver_list[contained_server_id].file_server_name); // append file server name
strcat(response_message, " ");
strcat(response_message, fileserver_list[contained_server_id].file_server_port); // append file server port
// printf("%s\n", response_message);
if((bc = sendto(phase2_socket, response_message, strlen(response_message)+1, 0, (struct sockaddr *)&file_addr, fromlen)) == -1) {
perror("Error: phase 2 directory server sendto");
exit(1);
}
printf("Phase 2: File server details has been sent to Client %s.\n", client_id);
}
close(phase2_socket);
printf("Phase 2: End of Phase 2 for the Directory Server.\n");
return 0;
}
