Server accepts messages but not commands in C - c

Question

I currently trying to create a program that you can connect from anywhere via the internet using sockets. I obviously want to execute commands and display the output to the client but also want to return anything that the client typed and if it was received, display message reveived. My problem is that even though it displays what was send, it doesn't execute commands. I have tryied to use gdb with break lines inide the while loop but they don't work as if the while loop is never executed.
Server:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
void error(const char *msg)
{
perror(msg);
exit(1);
}
int main(int argc, char *argv[])
{
int sockfd, newsockfd, portno, pid;
socklen_t clilen;
char buffer[256];
char* comm[20],*cbuff;
struct sockaddr_in serv_addr, cli_addr;
int n,i;
char str[INET_ADDRSTRLEN];
char* args;
if (argc < 2)
{
fprintf(stderr, "No port provided\n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
memset((char *) &serv_addr, 0, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
if (bind(sockfd,(struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
error("ERROR on binding");
for(;;){
listen(sockfd, 5);
clilen = sizeof(cli_addr);
newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
if (newsockfd < 0)
error("ERROR on accept");
if (inet_ntop(AF_INET, &cli_addr.sin_addr, str, INET_ADDRSTRLEN) == NULL) {
fprintf(stderr, "Could not convert byte to address\n");
exit(1);
}
fprintf(stdout, "The client address is :%s\n", str);
while(1){
bzero(buffer, 256);
n = read(newsockfd, buffer, 255);
if (n < 0) error("ERROR reading from socket");
if(buffer=="exit"){
printf("Exiting...\n");
break;
}
cbuff=strtok(buffer," ");
i=0;
while(cbuff!=NULL){
cbuff=strtok(NULL," ");
comm[i]=cbuff;
i++;
}
if ((pid=fork())==-1){
perror("fork");
}
if(pid!=0){
wait(NULL);
}
else{
dup2(newsockfd,1);
printf("executing...\n");
execvp(comm[0],comm);
perror("execvp");
exit(EXIT_FAILURE);
}
printf("Here is the message: %s\n", buffer);
n = write(newsockfd, "message received", 17);
if (n < 0) error("ERROR writing to socket");
}
break;
}
close(newsockfd);
close(sockfd);
return 0;
}
Client:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
void error(const char *msg){
perror(msg);
exit(0);
}
int main(int argc, char *argv[]){
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;
char buffer[256];
if (argc < 3){
fprintf(stderr, "usage %s hostname port\n", argv[0]);
exit(0);
}
portno = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
server = gethostbyname(argv[1]);
if (server == NULL){
fprintf(stderr, "ERROR, no such host\n");
exit(0);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr,
(char *)&serv_addr.sin_addr.s_addr,server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd, (struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0)
error("ERROR connecting");
do{
printf("Please enter the message: ");
bzero(buffer, 256);
fgets(buffer, 255, stdin);
if(buffer=="exit"){
printf("Exiting...\n");
break;
}
n = write(sockfd, buffer, strlen(buffer));
if (n < 0)
error("ERROR writing to socket");
bzero(buffer, 256);
n = read(sockfd, buffer, 255);
if (n < 0)
error("ERROR reading from socket");
printf("%s\n", buffer);
}while(1);
return 0;
}