updated materials

git-svn-id: file:///home/svn/framework3/trunk@4667 4d416f70-5f16-0410-b530-b9f4589650da

dev/materials/msf3_internals_training/tools/srv.c

@@ -0,0 +1,116 @@
+
+/* 
+ * srv.c -- Example server for easy exploiting
+ *
+ * Usage: srv <port>
+ *
+ * Example:
+ *
+ * C:\> srv 1234
+ * C:\> nload localhost 1234 -s code.s
+ *
+ */
+
+
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#if defined _WIN32
+#include <winsock2.h>
+#pragma comment(lib, "ws2_32.lib")
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <unistd.h> 
+#endif
+
+#define SERVER_PORT    5433
+#define MAX_PENDING     1
+
+
+int ehlo, from;
+
+/* Main function */
+
+int main(int argc, char **argv) {
+	struct 			sockaddr_in sin;
+	char 			buf[8092], *ptr;
+	int 			c, i, len, port;
+	int 			s, new_s, bytes;
+#if defined _WIN32
+	int 			wsaret;
+	WSADATA 		wsaData;
+#endif
+	int 			(*funct)();
+
+
+	/* Command line parameters */
+	if (argv[1])
+		port = atoi(argv[1]);
+	else
+		port = SERVER_PORT;
+
+#if defined _WIN32
+	/* Initialize winsock */
+	wsaret = WSAStartup(0x101, &wsaData);
+	if(wsaret != 0)
+		return (0);
+
+	/* Create a socket */
+	if ((s = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, 0)) < 0) {
+		fprintf(stderr, "%s: WSASocket - %s\n", argv[0], strerror(errno));
+		exit(1);
+	}
+#else
+	if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+		fprintf(stderr, "%s: socket - %s\n", argv[0], strerror(errno));
+		exit(1);
+	}
+
+#endif
+
+	/* Initialize the addres data structure */
+	memset((void *)&sin, 0, sizeof(sin));
+	sin.sin_family = AF_INET;
+	sin.sin_addr.s_addr = INADDR_ANY;
+	sin.sin_port = htons(port);
+
+	/* Bind an address to the socket */
+	if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
+		fprintf(stderr, "%s: bind - %s\n", argv[0], strerror(errno));
+		exit(1);
+	}
+
+	/* Set the length of the listen queue */
+	if (listen(s, MAX_PENDING) < 0) {
+		fprintf(stderr, "%s: listen - %s\n", argv[0], strerror(errno));
+		exit(1);
+	}
+	
+
+	len = sizeof(sin);
+	new_s = accept(s, (struct sockaddr *)&sin, &len);
+
+	memset(buf, 0, sizeof(buf));
+	bytes = recv(new_s, buf, sizeof(buf), 0);
+
+	printf("recv'd %d\n", bytes);
+
+
+	/* Run the code */
+	fprintf(stderr,"Oops.. I'm 0wned.\n");
+
+	__asm mov edi, new_s
+
+	funct = (int (*)()) buf;
+	(int)(*funct)();
+	
+	return (0);
+
+}
+
+