-
Notifications
You must be signed in to change notification settings - Fork 2
/
client.c
60 lines (55 loc) · 1.62 KB
/
client.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
#include "client.h"
int main(int argc, char *argv[])
{
check(argc != 2, 2, "USAGE ./clr HOSTNAME");
struct addrinfo hints, *res;
int status, sockfd;
pthread_t thread;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC; // AF_INET or AF_INET6 to force version
hints.ai_socktype = SOCK_STREAM;
// check argv[1]
check(argv[1][strlen(argv[1])] != '\0', 2, "invalid host");
status = getaddrinfo(argv[1], PORT_NUM, &hints, &res);
check(status != 0, 2, "getaddrinfo: %s\n", gai_strerror(status));
sockfd = createAndBind(res, 0);
char welcomeMsg[MAX_LENGTH], msg[MAX_LENGTH];
int bytesRec;
check((bytesRec = recv(sockfd, welcomeMsg, MAX_LENGTH-1, 0)) == -1, 2, "failed to receive message");
welcomeMsg[bytesRec] = '\0';
debug("message received: %s", welcomeMsg);
if (strcmp(WELCOME_MESSAGE, welcomeMsg) == 0) {
printf("Please enter a nickname first\n");
if (pthread_create(&thread, NULL, receiveMsgs, (void *) sockfd)) {
perror("failed to open thread");
}
while (fgets(msg, MAX_LENGTH, stdin) != NULL) {
debug("sent %s", msg);
if (send(sockfd, msg, MAX_LENGTH - 1, 0) == -1) {
perror("message failed");
break;
}
}
}
pthread_exit(NULL);
return 0;
}
void *receiveMsgs(void *sockfd)
{
char msg[MAX_LENGTH];
memset(msg, 0, MAX_LENGTH);
int nbytes;
for (;;) {
if ((nbytes = recv((int) sockfd, msg, MAX_LENGTH - 1, 0)) <= 0) {
if (nbytes != 0)
perror("error receiving.");
} else {
if (strlen(msg) > 0)
printf("USER: %s\n", msg);
fflush(stdout); // so our buffer will show
continue;
}
break;
}
return NULL;
}