summaryrefslogtreecommitdiff
path: root/src/dns.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/dns.cpp')
-rw-r--r--src/dns.cpp57
1 files changed, 35 insertions, 22 deletions
diff --git a/src/dns.cpp b/src/dns.cpp
index 15be13b77..b2c32c0fb 100644
--- a/src/dns.cpp
+++ b/src/dns.cpp
@@ -50,12 +50,25 @@ extern ServerConfig* Config;
extern time_t TIME;
extern userrec* fd_ref_table[MAX_DESCRIPTORS];
-enum QueryType { DNS_QRY_A = 1, DNS_QRY_PTR = 12 };
-enum QueryFlags1 { FLAGS1_MASK_RD = 0x01, FLAGS1_MASK_TC = 0x02, FLAGS1_MASK_AA = 0x04, FLAGS1_MASK_OPCODE = 0x78, FLAGS1_MASK_QR = 0x80 };
-enum QueryFlags2 { FLAGS2_MASK_RCODE = 0x0F, FLAGS2_MASK_Z = 0x70, FLAGS2_MASK_RA = 0x80 };
+enum QueryType
+{
+ DNS_QRY_A = 1,
+ DNS_QRY_PTR = 12
+};
-class dns_connection;
+enum QueryFlags
+{
+ FLAGS_MASK_RD = 0x01,
+ FLAGS_MASK_TC = 0x02,
+ FLAGS_MASK_AA = 0x04,
+ FLAGS_MASK_OPCODE = 0x78,
+ FLAGS_MASK_QR = 0x80,
+ FLAGS_MASK_RCODE = 0x0F,
+ FLAGS_MASK_Z = 0x70,
+ FLAGS_MASK_RA = 0x80
+};
+class dns_connection;
typedef std::map<int,dns_connection*> connlist;
typedef connlist::iterator connlist_iter;
@@ -70,7 +83,7 @@ class dns_rr_middle
{
public:
QueryType type;
- unsigned int _class;
+ unsigned int rr_class;
unsigned long ttl;
unsigned int rdlength;
};
@@ -93,7 +106,7 @@ class dns_connection
public:
unsigned char id[2];
unsigned char* res;
- unsigned int _class;
+ unsigned int rr_class;
QueryType type;
dns_connection()
@@ -121,12 +134,12 @@ class dns_connection
inline void dns_fill_rr(dns_rr_middle* rr, const unsigned char *input)
{
rr->type = (QueryType)((input[0] << 8) + input[1]);
- rr->_class = (input[2] << 8) + input[3];
+ rr->rr_class = (input[2] << 8) + input[3];
rr->ttl = (input[4] << 24) + (input[5] << 16) + (input[6] << 8) + input[7];
rr->rdlength = (input[8] << 8) + input[9];
}
-inline void dns_fill_header(dns_header *header, const unsigned char *input, const int l)
+inline void dns_fill_header(dns_header *header, const unsigned char *input, const int length)
{
header->id[0] = input[0];
header->id[1] = input[1];
@@ -136,10 +149,10 @@ inline void dns_fill_header(dns_header *header, const unsigned char *input, cons
header->ancount = (input[6] << 8) + input[7];
header->nscount = (input[8] << 8) + input[9];
header->arcount = (input[10] << 8) + input[11];
- memcpy(header->payload,&input[12],l);
+ memcpy(header->payload,&input[12],length);
}
-inline void dns_empty_header(unsigned char *output, const dns_header *header, const int l)
+inline void dns_empty_header(unsigned char *output, const dns_header *header, const int length)
{
output[0] = header->id[0];
output[1] = header->id[1];
@@ -153,19 +166,19 @@ inline void dns_empty_header(unsigned char *output, const dns_header *header, co
output[9] = header->nscount & 0xFF;
output[10] = header->arcount >> 8;
output[11] = header->arcount & 0xFF;
- memcpy(&output[12],header->payload,l);
+ memcpy(&output[12],header->payload,length);
}
-int dns_connection::send_requests(const dns_header *h, const int l, QueryType qt)
+int dns_connection::send_requests(const dns_header *h, const int length, QueryType qt)
{
insp_sockaddr addr;
unsigned char payload[sizeof(dns_header)];
- this->_class = 1;
+ this->rr_class = 1;
this->type = qt;
- dns_empty_header(payload,h,l);
+ dns_empty_header(payload,h,length);
memset(&addr,0,sizeof(addr));
#ifdef IPV6
@@ -177,7 +190,7 @@ int dns_connection::send_requests(const dns_header *h, const int l, QueryType qt
addr.sin_family = AF_FAMILY;
addr.sin_port = htons(53);
#endif
- if (sendto(master_socket, payload, l + 12, 0, (sockaddr *) &addr, sizeof(addr)) == -1)
+ if (sendto(master_socket, payload, length + 12, 0, (sockaddr *) &addr, sizeof(addr)) == -1)
{
log(DEBUG,"Error in sendto!");
return -1;
@@ -194,7 +207,7 @@ dns_connection* dns_add_query(dns_header *h, int &id)
h->id[0] = s->id[0] = id >> 8;
h->id[1] = s->id[1] = id & 0xFF;
- h->flags1 = FLAGS1_MASK_RD;
+ h->flags1 = FLAGS_MASK_RD;
h->flags2 = 0;
h->qdcount = 1;
h->ancount = 0;
@@ -259,7 +272,7 @@ void create_socket()
}
}
-int dns_build_query_payload(const char * const name, const unsigned short rr, const unsigned short _class, unsigned char * const payload)
+int dns_build_query_payload(const char * const name, const unsigned short rr, const unsigned short rr_class, unsigned char * const payload)
{
short payloadpos;
const char * tempchr, * tempchr2;
@@ -293,7 +306,7 @@ int dns_build_query_payload(const char * const name, const unsigned short rr, co
return -1;
l = htons(rr);
memcpy(&payload[payloadpos],&l,2);
- l = htons(_class);
+ l = htons(rr_class);
memcpy(&payload[payloadpos + 2],&l,2);
return payloadpos + 4;
}
@@ -413,17 +426,17 @@ unsigned char* dns_connection::result_ready(dns_header &h, int length)
dns_rr_middle rr;
unsigned short p;
- if ((h.flags1 & FLAGS1_MASK_QR) == 0)
+ if ((h.flags1 & FLAGS_MASK_QR) == 0)
{
log(DEBUG,"DNS: didnt get a query result");
return NULL;
}
- if ((h.flags1 & FLAGS1_MASK_OPCODE) != 0)
+ if ((h.flags1 & FLAGS_MASK_OPCODE) != 0)
{
log(DEBUG,"DNS: got an OPCODE and didnt want one");
return NULL;
}
- if ((h.flags2 & FLAGS2_MASK_RCODE) != 0)
+ if ((h.flags2 & FLAGS_MASK_RCODE) != 0)
{
log(DEBUG,"DNS lookup failed due to SERVFAIL");
return NULL;
@@ -486,7 +499,7 @@ unsigned char* dns_connection::result_ready(dns_header &h, int length)
i += rr.rdlength;
continue;
}
- if (rr._class != this->_class)
+ if (rr.rr_class != this->rr_class)
{
curanswer++;
i += rr.rdlength;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 21:43:31 +0000