server-client-network/SocketUtils.c

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include "SocketUtils.h"
#include "Stream.h"

int sendAll(int socket, Stream* out)
{
    char* data = out->data;
    int left = out->index;
    streamUpdateIndex(out);
    while(left > 0)
    {
        int bytes = send(socket, data, left, MSG_NOSIGNAL);
        if(bytes == -1)
        {
            perror("Cannot send data");
            return -1;
        }
        left -= bytes;
        data += bytes;
    }
    return out->index;
}

int receiveAll(int socket, Stream* in)
{   
    int size = recv(socket, in->data, in->size, 0);
    if(size > 0)
    {
        int dataLength = streamGetIndex(in);
        if(size == dataLength)
        {
            in->size = dataLength;
            return dataLength;
        }
        streamEnsureCapacity(in, dataLength);
        in->size = dataLength;
        
        char* data = in->data + size;
        int left = dataLength - size;
        while(left > 0)
        {
            size = recv(socket, data, left, 0);
            if(size > 0)
            {
                data += size;
                left -= size;
            }
            else if(size == 0)
            {
                printf("Remote Socket closed\n");
                return -1;
            }   
            else
            {
                perror("recv error");
                return -1;
            }
        }
        return dataLength;
    }
    else if(size == 0)
    {
        printf("Remote Socket closed\n");
        return 0;
    }   
    else
    {
        perror("recv error");
        return -1;
    }
    return -1;
}