From 967be9e750221ab2ab783f95df79bb26d290a45e Mon Sep 17 00:00:00 2001
From: Martial Simon <msimon_fr@hotmail.com>
Date: Mon, 15 Sep 2025 01:07:58 +0200
Subject: add: added projects

---
 bittorrent/epoll_server/epoll_server.c | 134 +++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 bittorrent/epoll_server/epoll_server.c

(limited to 'bittorrent/epoll_server/epoll_server.c')

diff --git a/bittorrent/epoll_server/epoll_server.c b/bittorrent/epoll_server/epoll_server.c
new file mode 100644
index 0000000..dc010e6
--- /dev/null
+++ b/bittorrent/epoll_server/epoll_server.c
@@ -0,0 +1,134 @@
+#include "epoll_server.h"
+
+#include <netdb.h>
+#include <stdlib.h>
+#include <sys/epoll.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include "connection.h"
+#include "string.h"
+
+int create_and_bind(struct addrinfo *addrinfo)
+{
+    for (struct addrinfo *info = addrinfo; info != NULL; info = info->ai_next)
+    {
+        int sock_fd =
+            socket(info->ai_family, info->ai_socktype, info->ai_protocol);
+        if (sock_fd != -1)
+        {
+            int feur = bind(sock_fd, info->ai_addr, info->ai_addrlen);
+            if (feur != -1)
+            {
+                return sock_fd;
+            }
+            else
+            {
+                close(sock_fd);
+            }
+        }
+    }
+    exit(1);
+}
+
+int prepare_socket(const char *ip, const char *port)
+{
+    struct addrinfo hints;
+    memset(&hints, 0, sizeof(hints));
+    struct addrinfo *addrinfo;
+    int e = getaddrinfo(ip, port, &hints, &addrinfo);
+    if (e != 0)
+    {
+        exit(1);
+    }
+    e = create_and_bind(addrinfo);
+    int e2 = listen(e, 1000);
+    freeaddrinfo(addrinfo);
+    if (e2 == -1)
+    {
+        close(e);
+        exit(1);
+    }
+    return e;
+}
+
+struct connection_t *accept_client(int epoll_instance, int server_socket,
+                                   struct connection_t *connection)
+{
+    int e = accept(server_socket, NULL, 0);
+    if (e == -1)
+    {
+        close(server_socket);
+        exit(1);
+    }
+    struct epoll_event tmp;
+    tmp.events = EPOLLIN;
+    tmp.data.fd = e;
+    int er = epoll_ctl(epoll_instance, EPOLL_CTL_ADD, e, &tmp);
+    if (er == -1)
+    {
+        close(server_socket);
+        close(e);
+        exit(1);
+    }
+    return add_client(connection, e);
+}
+
+int main(int argc, char **argv)
+{
+    if (argc != 3)
+    {
+        exit(1);
+    }
+    int epoll_instance = epoll_create1(0);
+    if (epoll_instance == -1)
+    {
+        exit(1);
+    }
+    int e = prepare_socket(argv[1], argv[2]);
+    struct connection_t *co = NULL;
+    struct epoll_event tmp;
+    tmp.events = EPOLLIN;
+    tmp.data.fd = e;
+    if (epoll_ctl(epoll_instance, EPOLL_CTL_ADD, e, &tmp) == -1)
+    {
+        close(e);
+        exit(1);
+    }
+    while (1)
+    {
+        struct epoll_event elist[MAX_EVENTS];
+        int info = epoll_wait(epoll_instance, elist, MAX_EVENTS, -1);
+        if (info == -1)
+        {
+            exit(1);
+        }
+        for (int i = 0; i < info; i++)
+        {
+            int fd = elist[i].data.fd;
+            if (fd == e)
+            {
+                co = accept_client(epoll_instance, e, co);
+            }
+            else
+            {
+                char buf[100] = { 0 };
+                int info1 = recv(fd, buf, 100, 0);
+                if (info1 < 1)
+                {
+                    co = remove_client(co, fd);
+                    close(fd);
+                }
+                else
+                {
+                    struct connection_t *tmp = co;
+                    while (tmp != NULL)
+                    {
+                        send(tmp->client_socket, buf, info1, 0);
+                        tmp = tmp->next;
+                    }
+                }
+            }
+        }
+    }
+}
-- 
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