Usermode - Stub UDP tester (in the form of a DNS client)

[tpg/acess2.git] / Usermode / Applications / dnsresolve_src / main.c

diff --git a/Usermode/Applications/dnsresolve_src/main.c b/Usermode/Applications/dnsresolve_src/main.c
new file mode 100644 (file)
index 0000000..bdec44c
--- /dev/null
+++ b/Usermode/Applications/dnsresolve_src/main.c
@@ -0,0 +1,92 @@
+/*\r
+ * DNS Resolver\r
+ */\r
+#include <acess/sys.h>\r
+#include <stdio.h>\r
+#include <net.h>\r
+\r
+// === CONSTANTS ===\r
+#define NAMESERVER     {10,0,2,3}\r
+\r
+uint8_t        packet[] = {\r
+               // --- UDP header\r
+               53, 0,  // Dest port\r
+               4, 0,   // IPv4\r
+               10,0,2,3,       // Dest address\r
+               // --- DNS Packet\r
+               0x13,0x37,\r
+               0x01,   // Recursion Desired\r
+               0x00,\r
+               0,1,    // QDCOUNT\r
+               0,0,\r
+               0,0,\r
+               0,0,    // ARCOUNT\r
+               \r
+               #if 0\r
+               // www.mutabah.net, A, IN\r
+               3,'w','w','w',\r
+               7,'m','u','t','a','b','a','h',\r
+               3,'n','e','t',\r
+               #else\r
+               // mussel.ucc.asn.au, A, IN\r
+               6,'m','u','s','s','e','l',\r
+               3,'u','c','c',\r
+               3,'a','s','n',\r
+               2,'a','u',\r
+               #endif\r
+               0,\r
+               0,1,    // A\r
+               0,1             // IN\r
+       };\r
+\r
+// === TYPES ===\r
+typedef struct sDNSPacket\r
+{\r
+       uint16_t        ID;\r
+       // 1: Query/Response, 4: Opcode, 1: Authorative Answer, 1: Truncation, 1: Recursion Denied\r
+       uint8_t opcode;\r
+       uint8_t rcode;  // 1: Recusions Desired, 3: Zero, 4: Response Code\r
+       uint16_t        qdcount;        // Question Count\r
+       uint16_t        ancount;        // Answer Count\r
+       uint16_t        nscount;        // Nameserver Resource Count\r
+       uint16_t        arcount;        // Additional Records count\r
+}      tDNSPacket;\r
+\r
+// === PROTOTYPES ===\r
+\r
+// ==== CODE ====\r
+int main(int argc, char *argv[], char *envp[])\r
+{\r
+        int    fd, tmp;\r
+       uint16_t        port = 53;\r
+       uint8_t         destip[4] = NAMESERVER;\r
+       uint8_t         buf[512];\r
+       tDNSPacket      *hdr = (void *) (buf + 4 + 4);\r
+\r
+       fd = Net_OpenSocket(4, destip, "udp");\r
+       if( fd == -1 ) {\r
+               fprintf(stderr, "Unable to create a UDP socket\n");\r
+               return 0;\r
+       }\r
+       port = 0;       ioctl(fd, ioctl(fd, 3, "getset_localport"), &port);\r
+       port = 53;      ioctl(fd, ioctl(fd, 3, "getset_remoteport"), &port);\r
+       ioctl(fd, ioctl(fd, 3, "set_remoteaddr"), &destip);\r
+       tmp = 32;       ioctl(fd, ioctl(fd, 3, "getset_remotemask"), &tmp);\r
+       \r
+       write(fd, sizeof(packet), packet);\r
+       read(fd, 512, buf);\r
+       \r
+       printf("hdr = {\n");\r
+       printf("  .ID = 0x%04x\n", hdr->ID);\r
+       printf("  .opcode = 0x%04x\n", hdr->opcode);\r
+       printf("  .rcode = 0x%02x\n", hdr->rcode);\r
+       printf("  .qdcount = 0x%04x\n", hdr->qdcount);\r
+       printf("  .ancount = 0x%04x\n", hdr->ancount);\r
+       printf("  .nscount = 0x%04x\n", hdr->nscount);\r
+       printf("  .arcount = 0x%04x\n", hdr->arcount);\r
+       printf("}\n");\r
+       \r
+       \r
+       close(fd);\r
+       return 0;\r
+}\r