Add project files.

Discovery/discovery.c

@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <winsock.h>
+
+#define MAXBUF 512
+char buf[MAXBUF];
+
+int main(int argc, char* argv[])
+{
+    WSADATA data;
+    SOCKET sock;
+    struct sockaddr_in addr;
+    int i, len, fromlen;
+
+    if (argc != 2) {
+        printf("usage: wudp <IP address>\n");
+        exit(1);
+    }
+
+    /* initialize windows socket */
+    WSAStartup(0x0101, &data);
+
+    /* Create socket */
+    if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == INVALID_SOCKET) {
+        fprintf(stderr, "Error socket(): %d\n", WSAGetLastError());
+        exit(1);
+    }
+
+    /* initialize the parameter */
+    memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(3289);
+    addr.sin_addr.s_addr = inet_addr(argv[1]);
+
+    /* make a packet (PRINTER STATUS) */
+    buf[0] = 'E';
+    buf[1] = 'P';
+    buf[2] = 'S';
+    buf[3] = 'O';
+    buf[4] = 'N';
+    buf[5] = 'Q'; // PacketType(Q)
+    buf[6] = 0x03; // DeviceType(3)
+    buf[7] = 0x00; // DeviceNumber(0)
+    buf[8] = 0x00; // Function(0010h)
+    buf[9] = 0x10;
+    
+    buf[10] = 0x00; // Result
+    buf[11] = 0x00;
+    buf[12] = 0x00; // Parameter length
+    buf[13] = 0x00;
+
+    /* send a packet */
+    i = sendto(sock, buf, 14, 0, (struct sockaddr*)&addr, sizeof(addr));
+
+    /* receive packet */
+    fromlen = sizeof(addr);
+    len = recvfrom(sock, buf, MAXBUF, 0, (struct sockaddr*)&addr, &fromlen);
+
+    /* print receive packet */
+    if (len) {
+        if ((buf[10] == 0x00) && (buf[11] == 0x00))
+            for (i = 0; i < len; i++)
+                printf("%3d:%02Xh\n", i, buf[i] & 0xff);
+    }
+
+    /* close socket */
+    closesocket(sock);
+    return 0;
+}