1 files changed, 66 insertions, 0 deletions
diff --git a/overflow_tcp.c b/overflow_tcp.c
new file mode 100644
index 0000000..cafeaec
--- /dev/null
+++ b/overflow_tcp.c
@@ -0,0 +1,66 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+
+#define MAXLINE 1024
+#define BUFLEN 256
+#define SERV_PORT 3000
+#define LISTENQ 8
+
+int main (int argc, char **argv)
+{
+  int listenfd, connfd, n, line = 0, status;
+  pid_t childpid, w;
+  socklen_t clilen;
+  char buf[BUFLEN];
+  struct sockaddr_in cliaddr, servaddr;
+
+  if ((listenfd = socket(AF_INET, SOCK_STREAM, 0)) <0) {
+    perror("socket");
+    exit(1);
+  }
+
+  servaddr.sin_family = AF_INET;
+  servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+  servaddr.sin_port = htons(SERV_PORT);
+
+  if (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) != 0) {
+    perror("bind");
+    exit(2);
+  }
+  if (listen(listenfd, LISTENQ) != 0) {
+    perror("listen");
+    exit(3);
+  }
+
+  fprintf(stderr, "Server running on port %d ...\n", SERV_PORT);
+  for (;;) {
+    memset(buf, 0, BUFLEN);
+    clilen = sizeof(cliaddr);
+    connfd = accept (listenfd, (struct sockaddr *) &cliaddr, &clilen);
+    if (connfd < 0) break;
+    fprintf(stderr, "Client connected.\n");
+    if ((childpid = fork ()) == 0 ) {
+      while ((n = recv(connfd, buf, MAXLINE,0)) > 0)  {
+        fprintf(stderr, "[%d] Received string(%d): %s", line, n, buf);
+        memset(buf, 0, BUFLEN);
+        line++;
+      }
+      exit(1);
+    }
+    if ((w = wait(&status))) {
+      if (WIFEXITED(status)) {
+        kill(w, SIGCHLD);
+      }
+    }
+  }
+
+  close(listenfd);
+  return (0);
+}