1 files changed, 108 insertions, 0 deletions
diff --git a/P4/util.c b/P4/util.c
new file mode 100644
index 0000000..2e2be63
--- /dev/null
+++ b/P4/util.c
@@ -0,0 +1,108 @@
+#ifndef _REENTRANT
+#define _REENTRANT
+#endif
+
+#include <stdio.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "util.h"
+
+//Global socket for all things
+int socket;
+
+/**********************************************
+ * init
+   - port is the number of the port you want the server to be
+     started on
+   - initializes the connection acception/handling system
+   - YOU MUST CALL THIS EXACTLY ONCE (not once per thread,
+     but exactly one time, in the main thread of your program)
+     BEFORE USING ANY OF THE FUNCTIONS BELOW
+   - if init encounters any errors, it will call exit().
+************************************************/
+void init(int port) {
+  struct sockaddr_in addr;
+  addr.sin_family = AF_INET;
+  addr.sin_addr.s_addr = htonl(INADDR_ANY);
+  addr.sin_port = htons(port);
+  //Allow port to be released
+  int enable = 1;
+  if (setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, (char *)&enable, sizeof(int)) == -1) {
+    perror("Cannot set socket option");
+    exit(EXIT_FAILURE);
+  }
+  if (bind(socket, (struct sockaddr*) &addr, sizeof(addr)) == -1) {
+    perror("Cannot bind socket");
+    exit(EXIT_FAILURE);
+  }
+}
+
+/**********************************************
+ * accept_connection - takes no parameters
+   - returns a file descriptor for further request processing.
+     DO NOT use the file descriptor on your own -- use
+     get_request() instead.
+   - if the return value is negative, the request should be ignored.
+***********************************************/
+int accept_connection(void) {
+}
+
+/**********************************************
+ * get_request
+   - parameters:
+      - fd is the file descriptor obtained by accept_connection()
+        from where you wish to get a request
+      - filename is the location of a character buffer in which
+        this function should store the requested filename. (Buffer
+        should be of size 1024 bytes.)
+   - returns 0 on success, nonzero on failure. You must account
+     for failures because some connections might send faulty
+     requests. This is a recoverable error - you must not exit
+     inside the thread that called get_request. After an error, you
+     must NOT use a return_request or return_error function for that
+     specific 'connection'.
+************************************************/
+int get_request(int fd, char *filename) {
+}
+
+/**********************************************
+ * return_result
+   - returns the contents of a file to the requesting client
+   - parameters:
+      - fd is the file descriptor obtained by accept_connection()
+        to where you wish to return the result of a request
+      - content_type is a pointer to a string that indicates the
+        type of content being returned. possible types include
+        "text/html", "text/plain", "image/gif", "image/jpeg" cor-
+        responding to .html, .txt, .gif, .jpg files.
+      - buf is a pointer to a memory location where the requested
+        file has been read into memory (the heap). return_result
+        will use this memory location to return the result to the
+        user. (remember to use -D_REENTRANT for CFLAGS.) you may
+        safely deallocate the memory after the call to
+        return_result (if it will not be cached).
+      - numbytes is the number of bytes the file takes up in buf
+   - returns 0 on success, nonzero on failure.
+************************************************/
+int return_result(int fd, char *content_type, char *buf, int numbytes) {
+}
+
+/**********************************************
+ * return_error
+   - returns an error message in response to a bad request
+   - parameters:
+      - fd is the file descriptor obtained by accept_connection()
+        to where you wish to return the error
+      - buf is a pointer to the location of the error text
+   - returns 0 on success, nonzero on failure.
+************************************************/
+int return_error(int fd, char *buf) {
+}