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Nmap 4.02Alpha1 release for Everdream

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fyodor
2006-03-03 23:12:14 +00:00
parent bd46c3ae39
commit 848ad2a96a
19 changed files with 164 additions and 116 deletions
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20
nmap_dns.cc
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@@ -431,7 +431,7 @@ int encoded_name_to_normal(unsigned char *buf, char *output, int outputsize){
// Takes a pointer to the start of a DNS name inside a packet. It makes
// sure that there is enough space in the name, deals with compression, etc.
int advance_past_dns_name(unsigned char *buf, int buflen, int curbuf,
int advance_past_dns_name(u8 *buf, int buflen, int curbuf,
int *nameloc) {
int compression=0;
@@ -443,7 +443,7 @@ int advance_past_dns_name(unsigned char *buf, int buflen, int curbuf,
// Compression is OK
compression = curbuf+2;
curbuf = ((buf[curbuf+1] & 0xFF) + ((buf[curbuf] & 0xFF) << 8)) & 0x3FFF;
curbuf = (buf[curbuf+1] + (buf[curbuf] << 8)) & 0x3FFF;
if (curbuf < 0 || curbuf >= buflen) return -1;
}
@@ -462,7 +462,7 @@ int advance_past_dns_name(unsigned char *buf, int buflen, int curbuf,
// Nsock read handler. One nsock read for each DNS server exists at each
// time. This function uses various helper functions as defined above.
void read_evt_handler(nsock_pool nsp, nsock_event evt, void *nothing) {
unsigned char *buf;
u8 *buf;
int buflen, curbuf=0;
int i, nameloc, rdlen, atype, aclass;
int errcode=0;
@@ -485,7 +485,7 @@ void read_evt_handler(nsock_pool nsp, nsock_event evt, void *nothing) {
// Size of header is 12, and we must have additional data as well
if (buflen <= 12) return;
packet_id = (buf[1] & 0xFF) + ((buf[0] & 0xFF) << 8);
packet_id = buf[1] + (buf[0] << 8);
// Check that this is a response, standard query, and that no truncation was performed
// 0xFA == 11111010 (we're not concerned with AA or RD bits)
@@ -493,14 +493,14 @@ void read_evt_handler(nsock_pool nsp, nsock_event evt, void *nothing) {
// Check that Recursion is available, the zero field is all zeros
// and there is no error condition:
if ((buf[3] & 0xFF) != 0x80) {
if (buf[3] != 0x80) {
if ((buf[3] & 0xF) == 2) errcode = 2;
else if ((buf[3] & 0xF) == 3) errcode = 3;
else return;
}
queries = (buf[5] & 0xFF) + ((buf[4] & 0xFF) << 8);
answers = (buf[7] & 0xFF) + ((buf[6] & 0xFF) << 8);
queries = buf[5] + (buf[4] << 8);
answers = buf[7] + (buf[6] << 8);
// With a normal resolution, we should have 1+ queries and 1+ answers.
// If the domain doesn't resolve (NXDOMAIN or SERVFAIL) we should have
@@ -549,9 +549,9 @@ void read_evt_handler(nsock_pool nsp, nsock_event evt, void *nothing) {
// RDLENGTH (2) fields
if (curbuf + 10 >= buflen) return;
atype = (buf[curbuf+1] & 0xFF) + ((buf[curbuf+0] & 0xFF) << 8);
aclass = (buf[curbuf+3] & 0xFF) + ((buf[curbuf+2] & 0xFF) << 8);
rdlen = (buf[curbuf+9] & 0xFF) + ((buf[curbuf+8] & 0xFF) << 8);
atype = buf[curbuf+1] + (buf[curbuf+0] << 8);
aclass = buf[curbuf+3] + (buf[curbuf+2] << 8);
rdlen = buf[curbuf+9] + (buf[curbuf+8] << 8);
curbuf += 10;
if (atype == 12 && aclass == 1) {