Winsocket server. File opening issue - c

Question

I have created simple TCP server using winsock2.h library. It translates english words into lithuanian for clients. I recieve query from client like this:
int MAXRECV = 100;
char *buffer;
buffer = (char*) malloc((MAXRECV + 1) * sizeof(char));
valread = recv(new_socket, buffer, MAXRECV, 0);
buffer[valread] = '\0';
After that, I want to open a dictionary and find that word translation in a file. Here is a function call and function itself.
char *lithuanianWord;
lithuanianWord = (char*) malloc((MAXWORDSIZE + 1) * sizeof(char));
if (findTranslation(buffer, &lithuanianWord)) {
send(new_socket, lithuanianWord, strlen(lithuanianWord), 0);
} else {
lithuanianWord = "Translation not found";
send(new_socket, lithuanianWord, strlen(lithuanianWord), 0);
}
int findTranslation (char* word, char** lithuanianWord) {
FILE *fp;
int translationFound = 0;
const char englishWord[50];
char buffer[255];
fp = fopen("*\\dictionary.txt","r");
while((fgets(buffer,255,fp)) != NULL) {
sscanf(buffer,"%s%s", englishWord, lithuanianWord);
if(strcmp(englishWord, word)==0 ) {
translationFound = 1;
break;
}
}
fclose(fp);
return translationFound;
}
Code compiles and runs perfectly. The problem is that txt file does not open and answer is always "Translation not found". This function works fine when stand alone. Path is full and the same, I just shortened it.
Error I get: No such file or directory. Both client and server are runing on the same hardware.
Update: full server code.
#include<io.h>
#include<stdio.h>
#include<winsock2.h>
#include<string.h>
int findTranslation (char* word, char** translation);
int main(int argc , char *argv[])
{
WSADATA wsa;
SOCKET master , new_socket, client_socket[30], s;
struct sockaddr_in server , address;
int max_clients = 30, activity, addrlen, i, valread;
char *lithuanianWord;
int MAXWORDSIZE = 100;
lithuanianWord = (char*) malloc((MAXWORDSIZE + 1) * sizeof(char));
//size of our receive buffer, this is string length.
int MAXRECV = 100;
//set of socket descriptors
fd_set readfds;
//1 extra for null character, string termination
char *buffer, *message;
buffer = (char*) malloc((MAXRECV + 1) * sizeof(char));
for(i = 0 ; i < 30;i++)
{
client_socket[i] = 0;
}
printf("\nInitialising Winsock...");
if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
{
printf("Failed. Error Code : %d",WSAGetLastError());
exit(EXIT_FAILURE);
}
printf("Initialised.\n");
//Create a socket
if((master = socket(AF_INET , SOCK_STREAM , 0 )) == INVALID_SOCKET)
{
printf("Could not create socket : %d" , WSAGetLastError());
exit(EXIT_FAILURE);
}
printf("Socket created.\n");
//Prepare the sockaddr_in structure
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons( 8888 );
//Bind
if( bind(master ,(struct sockaddr *)&server , sizeof(server)) == SOCKET_ERROR)
{
printf("Bind failed with error code : %d" , WSAGetLastError());
}
puts("Bind done");
listen(master , 3);
puts("Waiting for incoming connections...");
addrlen = sizeof(struct sockaddr_in);
for(;;)
{
//clear the socket fd set
FD_ZERO(&readfds);
//add master socket to fd set
FD_SET(master, &readfds);
//add child sockets to fd set
for ( i = 0 ; i < max_clients ; i++)
{
s = client_socket[i];
if(s > 0)
{
FD_SET( s , &readfds);
}
}
//wait for an activity on any of the sockets, timeout is NULL , so wait indefinitely
activity = select( 0 , &readfds , NULL , NULL , NULL);
if ( activity == SOCKET_ERROR )
{
printf("select call failed with error code : %d" , WSAGetLastError());
exit(EXIT_FAILURE);
}
//If something happened on the master socket , then its an incoming connection
if (FD_ISSET(master , &readfds))
{
if ((new_socket = accept(master , (struct sockaddr *)&address, (int *)&addrlen))<0)
{
perror("accept");
exit(EXIT_FAILURE);
}
//inform user of socket number - used in send and receive commands
printf("New connection , socket fd is %d , ip is : %s , port : %d \n" , new_socket , inet_ntoa(address.sin_addr) , ntohs(address.sin_port));
//add new socket to array of sockets
for (i = 0; i < max_clients; i++)
{
if (client_socket[i] == 0)
{
client_socket[i] = new_socket;
printf("Adding to list of sockets at index %d \n" , i);
break;
}
}
valread = recv(new_socket, buffer, MAXRECV, 0);
buffer[valread] = '\0';
printf("%s:%d - %s \n" , inet_ntoa(address.sin_addr) , ntohs(address.sin_port), buffer);
int i = findTranslation(buffer, &lithuanianWord);
if (i == 1) {
send(new_socket, lithuanianWord, strlen(lithuanianWord), 0);
} else {
lithuanianWord = "Vertimas nerastas";
send(new_socket, lithuanianWord, strlen(lithuanianWord), 0);
}
}
//else its some IO operation on some other socket
for (i = 0; i < max_clients; i++)
{
s = client_socket[i];
//if client present in read sockets
if (FD_ISSET( s , &readfds))
{
//get details of the client
getpeername(s , (struct sockaddr*)&address , (int*)&addrlen);
//Check if it was for closing , and also read the incoming message
//recv does not place a null terminator at the end of the string (whilst printf %s assumes there is one).
valread = recv( s , buffer, MAXRECV, 0);
buffer[valread] = '\0';
if( valread == SOCKET_ERROR)
{
int error_code = WSAGetLastError();
if(error_code == WSAECONNRESET)
{
//Somebody disconnected , get his details and print
printf("Host disconnected unexpectedly , ip %s , port %d \n" , inet_ntoa(address.sin_addr) , ntohs(address.sin_port));
//Close the socket and mark as 0 in list for reuse
closesocket( s );
client_socket[i] = 0;
}
else
{
printf("recv failed with error code : %d" , error_code);
}
}
if ( valread == 0)
{
//Somebody disconnected , get his details and print
printf("Host disconnected , ip %s , port %d \n" , inet_ntoa(address.sin_addr) , ntohs(address.sin_port));
//Close the socket and mark as 0 in list for reuse
closesocket( s );
client_socket[i] = 0;
}
//Echo back the message that came in
else
{
i = findTranslation(buffer, &lithuanianWord);
if (i == 1) {
send(s, lithuanianWord, strlen(lithuanianWord), 0);
} else {
lithuanianWord = "Vertimas nerastas";
send(s, lithuanianWord, strlen(lithuanianWord), 0);
}
}
}
}
}
closesocket(s);
WSACleanup();
return 0;
}
int findTranslation (char* word, char** lithuanianWord) {
FILE *fp;
int translationFound = 0;
const char englishWord[50];
char buffer[255];
fp = fopen("C:\\Users\\Martynas\\Documents\\Programų_sistemos\\IV semestras\\Tinklai\\async\\dictionary.txt","r");
if (fp == NULL) {
perror("Error");
}
while((fgets(buffer,255,fp)) != NULL) {
sscanf(buffer,"%s%s", englishWord, lithuanianWord);
if(strcmp(englishWord, word)==0 ) {
translationFound = 1;
break;
}
}
fclose(fp);
return translationFound;
}