/*
********************************************************************************
* PARSE THE DNS REPLY
*
* Description : This function parses the reply message from DNS server.
* Arguments : dhdr - is a pointer to the header for DNS message
* buf - is a pointer to the reply message.
* len - is the size of reply message.
* Returns : None
* Note :
********************************************************************************
*/
uint8 parseMSG(struct dhdr * pdhdr, uint8 * pbuf)
{
uint16 tmp;
uint16 i;
uint8 * msg;
uint8 * cp;
msg = pbuf;
memset(pdhdr, 0, sizeof(pdhdr));
pdhdr->id = ntohs(*((uint16*)&msg[0]));
tmp = ntohs(*((uint16*)&msg[2]));
if (tmp & 0x8000) pdhdr->qr = 1;
pdhdr->opcode = (tmp >> 11) & 0xf;
if (tmp & 0x0400) pdhdr->aa = 1;
if (tmp & 0x0200) pdhdr->tc = 1;
if (tmp & 0x0100) pdhdr->rd = 1;
if (tmp & 0x0080) pdhdr->ra = 1;
pdhdr->rcode = tmp & 0xf;
pdhdr->qdcount = ntohs(*((uint16*)&msg[4]));
pdhdr->ancount = ntohs(*((uint16*)&msg[6]));
pdhdr->nscount = ntohs(*((uint16*)&msg[8]));
pdhdr->arcount = ntohs(*((uint16*)&msg[10]));
/* Now parse the variable length sections */
cp = &msg[12];
/* Question section */
for (i = 0; i < pdhdr->qdcount; i++)
{
cp = dns_question(msg, cp);
}
/* Answer section */
for (i = 0; i < pdhdr->ancount; i++)
{
cp = dns_answer(msg, cp);
}
/* Name server (authority) section */
for (i = 0; i < pdhdr->nscount; i++)
{
;
}
/* Additional section */
for (i = 0; i < pdhdr->arcount; i++)
{
;
}
if(pdhdr->rcode == 0) return 1; // No error
else return 0;
}
/*
********************************************************************************
* PARSE THE DNS REPLY
*
* Description : This function parses the reply message from DNS server.
* Arguments : dhdr - is a pointer to the header for DNS message
* buf - is a pointer to the reply message.
* Returns : None
* Note :
********************************************************************************
*/
u8 parseMSG(struct dhdr * pdhdr, u8 * pbuf, u8 * pSip)
{
u16 tmp;
u16 i;
u8 * msg;
u8 * cp;
msg = pbuf;
memset(pdhdr, 0, sizeof(pdhdr));
pdhdr->id = get16(&msg[0]);
tmp = get16(&msg[2]);
if (tmp & 0x8000) pdhdr->qr = 1;
pdhdr->opcode = (tmp >> 11) & 0xf;
if (tmp & 0x0400) pdhdr->aa = 1;
if (tmp & 0x0200) pdhdr->tc = 1;
if (tmp & 0x0100) pdhdr->rd = 1;
if (tmp & 0x0080) pdhdr->ra = 1;
pdhdr->rcode = tmp & 0xf;
pdhdr->qdcount = get16(&msg[4]);
pdhdr->ancount = get16(&msg[6]);
pdhdr->nscount = get16(&msg[8]);
pdhdr->arcount = get16(&msg[10]);
#ifdef DBG_DNS
printf("dhdr->qdcount : %x\r\n", (u16)dhdr->qdcount);
printf("dhdr->ancount : %x\r\n", (u16)dhdr->ancount);
printf("dhdr->nscount : %x\r\n", (u16)dhdr->nscount);
printf("dhdr->arcount : %x\r\n", (u16)dhdr->arcount);
#endif
/* Now parse the variable length sections */
cp = &msg[12];
/* Question section */
for (i = 0; i < pdhdr->qdcount; i++)
{
cp = dns_question(msg, cp);
}
/* Answer section */
for (i = 0; i < pdhdr->ancount; i++)
{
cp = dns_answer(msg, cp, pSip);
}
/* Name server (authority) section */
for (i = 0; i < pdhdr->nscount; i++)
{
;
}
/* Additional section */
for (i = 0; i < pdhdr->arcount; i++)
{
;
}
if(pdhdr->rcode == 0) return 1; // No error
else return 0;
}
