42/42_SIDE_exam_06_miniserv
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twice

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This commit is contained in:
hulamy
2023-02-10 15:23:28 +01:00
parent dfeb3c5e8f
commit 2454b02a85
2 changed files with 44 additions and 66 deletions
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mini_serv_ex.c
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@@ -1,5 +1,6 @@
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
@@ -34,15 +35,27 @@ void error(char *msg) {
exit(1);
}
void broadcast(char *buf, fd_set *set, int max_fd, int server_fd, int sender_fd) {
for(int i = 0; i <= max_fd; ++i) {
if (i == server_fd)
continue;
if (i == sender_fd)
continue;
if (FD_ISSET(i, set))
send(i, buf, strlen(buf), 0);
}
}
int main(int ac, char **av) {
int server_fd;
// int client_fd;
int client_fd;
int client_id;
int port;
int max_fd;
// char buf[BUFSIZE];
// char tmp_buf[BUFSIZE];
// int clients[FD_SETSIZE];
int ret;
char buf[BUFSIZE];
char tmp_buf[BUFSIZE];
int clients[FD_SETSIZE];
struct sockaddr_in addr;
socklen_t addr_len;
fd_set fdset;
@@ -53,16 +66,13 @@ int main(int ac, char **av) {
port = atoi(av[1]);
addr_len = sizeof(addr);
// socket create and verification
server_fd = socket(AF_INET, SOCK_STREAM, 0);
if (server_fd == -1)
error("Fatal error\n");
bzero(&addr, addr_len);
// assign IP, PORT
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(2130706433); //127.0.0.1
addr.sin_port = htons(port);
// Binding newly created socket to given IP and verification
if ((bind(server_fd, (const struct sockaddr *)&addr, addr_len)) == -1)
error("Fatal error\n");
if (listen(server_fd, 10) == -1)
@@ -79,69 +89,37 @@ int main(int ac, char **av) {
select(max_fd + 1, &rdset, NULL, NULL, NULL);
// new connection
if (FD_ISSET(server_fd, &rdset)) {
client_fd = accept(server_fd, (struct sockaddr *)&addr, &addr_len);
FD_SET(client_fd, &fdset);
clients[client_fd] = client_id;
if (client_fd > max_fd)
max_fd = client_fd;
sprintf(buf, "server: client %d just arrived\n", client_id);
broadcast(buf, &fdset, max_fd, server_fd, client_fd);
client_id++;
}
// new messages and close
client_fd = 0;
while(client_fd <= max_fd) {
if (FD_ISSET(client_fd, &rdset)) {
bzero(buf, BUFSIZE);
ret = recv(client_fd, buf, BUFSIZE, 0);
if (ret == 0) {
sprintf(buf, "server: client %d just left\n", clients[client_fd]);
broadcast(buf, &fdset, max_fd, server_fd, client_fd);
FD_CLR(client_fd, &fdset);
}
else if (ret > 0) {
sprintf(tmp_buf, "client %d: %s", clients[client_fd], buf);
broadcast(tmp_buf, &fdset, max_fd, server_fd, client_fd);
}
}
client_fd++;
}
}
return (0);
// len = sizeof(cli);
// connfd = accept(sockfd, (struct sockaddr *)&cli, &len);
// if (connfd < 0) {
// printf("server acccept failed...\n");
// exit(0);
// }
// else
// printf("server acccept the client...\n");
}
//int extract_message(char **buf, char **msg)
//{
// char *newbuf;
// int i;
//
// *msg = 0;
// if (*buf == 0)
// return (0);
// i = 0;
// while ((*buf)[i])
// {
// if ((*buf)[i] == '\n')
// {
// newbuf = calloc(1, sizeof(*newbuf) * (strlen(*buf + i + 1) + 1));
// if (newbuf == 0)
// return (-1);
// strcpy(newbuf, *buf + i + 1);
// *msg = *buf;
// (*msg)[i + 1] = 0;
// *buf = newbuf;
// return (1);
// }
// i++;
// }
// return (0);
//}
//
//char *str_join(char *buf, char *add)
//{
// char *newbuf;
// int len;
//
// if (buf == 0)
// len = 0;
// else
// len = strlen(buf);
// newbuf = malloc(sizeof(*newbuf) * (len + strlen(add) + 1));
// if (newbuf == 0)
// return (0);
// newbuf[0] = 0;
// if (buf != 0)
// strcat(newbuf, buf);
// free(buf);
// strcat(newbuf, add);
// return (newbuf);
//}