2 files changed, 83 insertions, 0 deletions
diff --git a/hacking.h b/hacking.h
index ef8d2c1..2684b6c 100644
--- a/hacking.h
+++ b/hacking.h
@@ -17,3 +17,28 @@ void *ec_malloc(unsigned int size)
     fatal("in ec_malloc() on memory allocation");
   return ptr;
 }
+
+void dump(const char *data_buffer, const unsigned int length) {
+  unsigned char byte;
+  unsigned int i, j;
+
+  for (int i = 0; i < length; i++) {
+    byte = data_buffer[i];
+    printf("%02x ", data_buffer[i]);
+    if ( ((i%16) == 15) || (i==length-1) ) {
+      for (int j = 0; j < 15 - (i%16); j++) {
+        printf("   ");
+      }
+      printf("| ");
+      for (j=(i-(i%16)); j <= i; j++) {
+        byte = data_buffer[j];
+        if ((byte > 31) && (byte < 127)) {
+          printf("%c", byte);
+        } else {
+          printf(".");
+        }
+      }
+      printf("\n");
+    }
+  }
+}
diff --git a/simple_server.c b/simple_server.c
new file mode 100644
index 0000000..574f4ea
--- /dev/null
+++ b/simple_server.c
@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include "hacking.h"
+
+#define PORT 7890
+
+int main()
+{
+  int sockfd, new_sockfd;
+  struct sockaddr_in host_addr, client_addr;
+  socklen_t sin_size;
+  int recv_length=1, yes=1;
+  char buffer[1024];
+
+  if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1)
+    fatal("in socket");
+
+  if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
+    fatal("setting socket option SO_REUSEADDR");
+  }
+
+  host_addr.sin_family = AF_INET;
+  host_addr.sin_port = htons(PORT);
+  host_addr.sin_addr.s_addr = 0;
+  memset(&(host_addr.sin_zero), '\0', 8);
+
+  if (bind(sockfd, (struct sockaddr *)&host_addr, sizeof(struct sockaddr)) == -1) {
+    fatal("binding to socket");
+  }
+
+  if (listen(sockfd, 5) == -1) {
+    fatal("listening on socket");
+  }
+
+  while(1) {
+    sin_size = sizeof(struct sockaddr_in);
+    new_sockfd = accept(sockfd, (struct sockaddr *)&client_addr, &sin_size);
+    if (new_sockfd == -1) {
+      fatal("accepting connection");
+    }
+    printf("server got connection from %s port %d\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
+    send(new_sockfd, "Hello, world!\n", 13, 0);
+    recv_length = recv(new_sockfd, &buffer, 1024, 0);
+    while(recv_length > 0){
+      printf("RECV: %d bytes\n", recv_length);
+      dump(buffer, recv_length);
+      recv_length = recv(new_sockfd, &buffer, 1024, 0);
+    }
+    close(new_sockfd);
+  }
+
+  return 0;
+}