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authorGravatar Jonas Gunz <himself@jonasgunz.de> 2019-11-29 23:54:01 +0100
committerGravatar Jonas Gunz <himself@jonasgunz.de> 2019-11-29 23:54:01 +0100
commit9a8214e0304a1dffe0a321d96d01045cfc34c8e8 (patch)
tree3a92b0f6de06290f6471eb30821faef6ea14bed6 /src/main.c
parent73ede020c76126e81325fcd8d3e186132db21198 (diff)
downloaddns-9a8214e0304a1dffe0a321d96d01045cfc34c8e8.tar.gz
asdf
Diffstat (limited to 'src/main.c')
-rw-r--r--src/main.c51
1 files changed, 41 insertions, 10 deletions
diff --git a/src/main.c b/src/main.c
index 120637d..9d3e214 100644
--- a/src/main.c
+++ b/src/main.c
@@ -12,10 +12,34 @@
#include <signal.h>
+#include "dns.h"
+#include "log.h"
+
#define PRINT_ERRNO() {printf("%s:%i %i:%s\n", __FILE__, __LINE__, errno, strerror(errno));}
#define UDP_BUFFER_LEN 512
+struct dns_message {
+ //Header
+ uint16_t id;
+
+ uint8_t QR; //Query:0 Reply:1
+ uint8_t OPCODE; //Query:0 Iquery:1 Status:2
+ uint8_t AA; //Authorative answer
+ uint8_t TC; //Truncation
+ uint8_t RD; //Recursion Desired
+ uint8_t RA; //Recursion Available
+ uint8_t RCODE; //Response Code
+
+ uint16_t question_count;
+ uint16_t answer_count;
+ uint16_t authorative_count;
+ uint16_t additional_count;
+
+ //Question
+ //Answer
+ };
+
int sock_server;
int dns_parse_packet ( int _socket,
@@ -36,7 +60,7 @@ int test_main( int argc,
char in[128];
char out[128];
- strncpy ( in, "www.example.com\0", 127);
+ strncpy ( in, "aaa.aaaaa.aa\0", 127);
printf("%s\n", in);
@@ -65,6 +89,8 @@ int main( int argc,
signal ( SIGTERM, signal_term );
signal ( SIGINT, signal_term );
+ log_init_stdout ( _LOG_DEBUG );
+
sock_server = socket ( AF_INET, SOCK_DGRAM, 0 );
if ( sock_server == -1 ) {
PRINT_ERRNO();
@@ -76,11 +102,11 @@ int main( int argc,
sock_server_addr.sin_port = htons( 53 );
ret = inet_aton ( "0.0.0.0", & sock_server_addr.sin_addr );
if( ret == 0 ) { //Error on 0, no errno!
- printf( "inet_aton(): Invalid IP\n" );
+ LOGPRINTF(_LOG_NOTE, "inet_aton(): Invalid IP\n" );
return 1;
}
- ret = bind( sock_server,
+ ret = bind ( sock_server,
(struct sockaddr*) &sock_server_addr,
sizeof(struct sockaddr_in) );
if ( ret == -1 ) {
@@ -103,22 +129,23 @@ int main( int argc,
(struct sockaddr*) &sock_client_addr,
&sock_client_addr_len );
if ( ret == -1 ) {
- PRINT_ERRNO();
+ LOGPRINTF( _LOG_ERROR, "recvfrom()");
return errno;
}
- printf ( "recieved\n" );
+ LOGPRINTF(_LOG_NOTE, "Connection");
if ( dns_parse_packet ( sock_server,
&sock_client_addr,
sock_client_addr_len,
recv_buffer,
ret ) ) {
- PRINT_ERRNO();
+ LOGPRINTF(_LOG_ERROR, "dns_parse_packet()");
return errno;
}
-
- printf ( "forked\n" );
+ else {
+ LOGPRINTF ( _LOG_DEBUG, "forked\n" );
+ }
}
close( sock_server );
@@ -130,7 +157,8 @@ int dns_parse_packet ( int _socket,
struct sockaddr_in *sockaddr_client,
socklen_t sockaddr_client_len,
char* buffer,
- int bufflen ) {
+ int bufflen )
+{
pid_t pid = fork();
if ( pid > 0)
@@ -140,7 +168,10 @@ int dns_parse_packet ( int _socket,
signal ( SIGTERM, signal_term_child);
- sleep ( 999 ); //Keep child active
+ struct dns_message msg;
+
+ msg.id = *( (uint16_t*) buffer );
+ msg.QR = 0x80 & *( (uint8_t*) (buffer + 2));
exit ( 0 );
}