42/42_SIDE_exam_06_miniserv
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maxfd as in exam

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asus
2023-02-21 14:29:13 +01:00
parent 1d690b43bd
commit 2d93332cf9
5 changed files with 178 additions and 12134 deletions
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a.out
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log.txt
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log1.txt
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18
mini_serv.c
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@@ -35,6 +35,7 @@ int main(int ac, char **av) {
int id; int id;
int ret; int ret;
int port; int port;
int tmp_max;
int max_fd; int max_fd;
char buf[BUFSIZE]; char buf[BUFSIZE];
char msg[BUFSIZE]; char msg[BUFSIZE];
@@ -70,12 +71,13 @@ int main(int ac, char **av) {
FD_ZERO(&fdset); FD_ZERO(&fdset);
FD_SET(server_fd, &fdset); FD_SET(server_fd, &fdset);
max_fd = server_fd; tmp_max = server_fd;
id = 0; id = 0;
while(1) { while(1) {
rdset = fdset; rdset = fdset;
wdset = fdset; wdset = fdset;
max_fd = tmp_max;
select(max_fd + 1, &rdset, &wdset, NULL, NULL); select(max_fd + 1, &rdset, &wdset, NULL, NULL);
@@ -83,7 +85,7 @@ int main(int ac, char **av) {
client_fd = accept(server_fd, (struct sockaddr *)&addr, &addr_len); client_fd = accept(server_fd, (struct sockaddr *)&addr, &addr_len);
FD_SET(client_fd, &fdset); FD_SET(client_fd, &fdset);
if (client_fd > max_fd) if (client_fd > max_fd)
max_fd = client_fd; tmp_max = client_fd;
clients[client_fd].id = id; clients[client_fd].id = id;
bzero(clients[client_fd].msg, MSGSIZE); bzero(clients[client_fd].msg, MSGSIZE);
sprintf(msg, "server: client %d just arrived\n", id); sprintf(msg, "server: client %d just arrived\n", id);
@@ -100,12 +102,12 @@ int main(int ac, char **av) {
broadcast(msg, &wdset, max_fd, client_fd); broadcast(msg, &wdset, max_fd, client_fd);
FD_CLR(client_fd, &fdset); FD_CLR(client_fd, &fdset);
close(client_fd); close(client_fd);
if (client_fd == max_fd) { //if (client_fd == max_fd) {
for(; max_fd > 2; --max_fd) { // for(; max_fd > 2; --max_fd) {
if (FD_ISSET(max_fd, &fdset)) // if (FD_ISSET(max_fd, &fdset))
break; // break;
} // }
} //}
} }
else if (ret > 0) { else if (ret > 0) {
for(int i = 0, j = strlen(clients[client_fd].msg); i < ret; ++i, ++j) { for(int i = 0, j = strlen(clients[client_fd].msg); i < ret; ++i, ++j) {

126
mini_serv_test.c
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@@ -1,126 +0,0 @@
#include <errno.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#define MSGSIZE 1024
#define BUFSIZE 120000
typedef struct s_client {
int id;
char msg[MSGSIZE];
} t_client;
void error(char *msg) {
write(2, msg, strlen(msg));
exit (1);
}
void broadcast(char *msg, fd_set *set, int max_fd, int client_fd) {
for(int fd = 0; fd < max_fd; ++fd) {
if (fd == client_fd)
continue;
if (FD_ISSET(fd, set))
send(fd, msg, strlen(msg), 0);
}
}
int main(int ac, char **av) {
int server_fd;
int client_fd;
int id;
int ret;
int port;
int max_fd;
struct sockaddr_in addr;
socklen_t addr_len;
fd_set fdset;
fd_set rdset;
fd_set wdset;
char buf[BUFSIZE];
char msg[BUFSIZE];
t_client clients[FD_SETSIZE];
if (ac != 2)
error("Wrong number of arguments\n");
if ( (port = atoi(av[1])) == -1)
error("Fatal error\n");
addr_len = sizeof(addr);
bzero(&addr, addr_len);
// socket create and verification
server_fd = socket(AF_INET, SOCK_STREAM, 0);
if (server_fd == -1)
error("Fatal error\n");
// 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)
error("Fatal error\n");
FD_ZERO(&fdset);
FD_SET(server_fd, &fdset);
id = 0;
max_fd = server_fd;
while(1) {
rdset = fdset;
wdset = fdset;
select(max_fd + 1, &rdset, &wdset, NULL, NULL);
if (FD_ISSET(server_fd, &rdset)) {
client_fd = accept(server_fd, (struct sockaddr *)&addr, &addr_len);
FD_SET(client_fd, &fdset);
if (client_fd > max_fd)
max_fd = client_fd;
clients[client_fd].id = id;
bzero(clients[client_fd].msg, MSGSIZE);
sprintf(msg, "server: client %d just arrived\n", id);
broadcast(msg, &wdset, max_fd, client_fd);
id++;
}
client_fd = 0;
while(client_fd <= max_fd) {
ret = 1;
if (FD_ISSET(client_fd, &rdset)) {
bzero(buf, BUFSIZE);
ret = recv(client_fd, buf, BUFSIZE, 0);
if (ret == 0) {
sprintf(msg, "server: client %d just left\n", clients[client_fd].id);
broadcast(msg, &wdset, max_fd, client_fd);
FD_CLR(client_fd, &fdset);
close(client_fd);
}
else if (ret > 0) {
for(int i = 0, j = strlen(clients[client_fd].msg); i < ret; ++i, ++j) {
clients[client_fd].msg[j] = buf[i];
if (buf[i] == '\n') {
clients[client_fd].msg[j] = '\0';
sprintf(msg, "client %d: %s\n", clients[client_fd].id, clients[client_fd].msg);
broadcast(msg, &wdset, max_fd, client_fd);
bzero(clients[client_fd].msg, MSGSIZE);
j = -1;
}
}
}
}
client_fd++;
}
}
return (0);
}