void LTA(char *buf, char *word) {
char tmp_buf[128];
strcpy(buf, word);
remove_punctuation(buf);
replace_with(tmp_buf, buf, "ight", "ite");
/* Don't process words 4 letters or under */
if (strlen(buf) <= 5) return;
buf[0] = word[0];
remove_vowels(buf);
}
int main(int argc, char *argv[])
{
if(argc != 2) {
printf("\nUsage:\n\nserver portnumber\n\n");
return -1;
}
char* port_number = (char *)malloc(sizeof(argv[1]));
memcpy(port_number, argv[1], sizeof(argv[1]));
printf("Port number: %s\n", port_number);
int sockfd, new_fd; // listen on sock_fd, new connection on new_fd
struct addrinfo hints, *servinfo, *p;
struct sockaddr_storage their_addr; // connector's address information
socklen_t sin_size;
struct sigaction sa;
int yes=1;
char s[INET6_ADDRSTRLEN];
int rv;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE; // use my IP
if ((rv = getaddrinfo(NULL, port_number, &hints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return 1;
}
// loop through all the results and bind to the first we can
for(p = servinfo; p != NULL; p = p->ai_next) {
if ((sockfd = socket(p->ai_family, p->ai_socktype,
p->ai_protocol)) == -1) {
perror("server: socket");
continue;
}
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes,
sizeof(int)) == -1) {
perror("setsockopt");
exit(1);
}
if (bind(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
close(sockfd);
perror("server: bind");
continue;
}
break;
}
if (p == NULL) {
fprintf(stderr, "server: failed to bind\n");
return 2;
}
freeaddrinfo(servinfo); // all done with this structure
if (listen(sockfd, BACKLOG) == -1) {
perror("listen");
exit(1);
}
sa.sa_handler = sigchld_handler; // reap all dead processes
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sa, NULL) == -1) {
perror("sigaction");
exit(1);
}
printf("server: waiting for connections...\n");
while(1) { // main accept() loop
sin_size = sizeof their_addr;
new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
if (new_fd == -1) {
perror("accept");
continue;
}
inet_ntop(their_addr.ss_family,
get_in_addr((struct sockaddr *)&their_addr),
s, sizeof s);
printf("server: got connection from %s\n", s);
if (!fork()) { // this is the child process
close(sockfd); // child doesn't need the listener
//read in data
//do appropriate action
lab_1_request *request = (lab_1_request *)malloc(sizeof(lab_1_request));
int num_bytes;
if(num_bytes = recv(new_fd, request, sizeof(lab_1_request), 0) == -1) {
perror("read error");
exit(-1);
}
printf("Read %d bytes\n", num_bytes);
to_host_byte_order(request);
displayBuffer((char *) request, num_bytes);
printf("\nReceived from client:\n");
printf("Message size: %d\n", request->total_message_length);
printf("Request id: %d\n", request->request_id);
printf("Operation: %d\n", request->operation);
printf("Message: %s\n\n", request->message);
if(request->operation == VLENGTH_REQUEST) {
vowel_length(new_fd, request);
} else if (request->operation == VOWEL_REMOVAL_REQUEST) {
remove_vowels(new_fd, request);
} else {
printf("Invalid request id\n");
}
close(new_fd);
exit(0);
}
close(new_fd); // parent doesn't need this
}
free(port_number);
return 0;
}
