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client.c
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client.c
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#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <netinet/ip.h>
#include <errno.h>
void main()
{
int socketfd;
struct sockaddr_in serverAddress;
struct sockaddr server;
socketfd = socket(AF_INET, SOCK_STREAM, 0); // full duplex byte stream
if (socketfd == -1)
{
perror("creating server socket!");
_exit(0);
}
serverAddress.sin_port = htons(3001); // convert to big Endian
serverAddress.sin_family = AF_INET;
serverAddress.sin_addr.s_addr = htonl(INADDR_ANY); // automatically assign ip
if (connect(socketfd, (struct sockaddr *)&serverAddress, sizeof(serverAddress)) == -1)
{
perror("connecting to server!");
close(socketfd);
_exit(0);
}
char readBuffer[1000], writeBuffer[1000];
ssize_t readBytes, writeBytes;
char tempBuffer[1000];
do
{
bzero(readBuffer, sizeof(readBuffer));
bzero(tempBuffer, sizeof(tempBuffer));
readBytes = read(socketfd, readBuffer, sizeof(readBuffer));
if (readBytes == -1)
perror("reading from client socket!");
else if (strchr(readBuffer, '^') != NULL)
{
strncpy(tempBuffer, readBuffer, strlen(readBuffer) - 1);
printf("%s\n", tempBuffer);
writeBytes = write(socketfd, "^", strlen("^"));
if (writeBytes == -1)
{
perror("writing to client socket!");
break;
}
}
else if (strchr(readBuffer, '$') != NULL)
{
strncpy(tempBuffer, readBuffer, strlen(readBuffer) - 2);
printf("%s\n", tempBuffer);
printf("Closing connection...\n");
break;
}
else
{
bzero(writeBuffer, sizeof(writeBuffer));
printf("%s\n", readBuffer);
scanf("%[^\n]%*c", writeBuffer);
writeBytes = write(socketfd, writeBuffer, strlen(writeBuffer));
if (writeBytes == -1)
{
perror("writing to client!");
break;
}
}
} while (readBytes > 0);
close(socketfd);
}