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Erik Kline cleaned up ares_gethostbyaddr.c:next_lookup() somewhat

This commit is contained in:
Daniel Stenberg 2007-12-03 10:25:05 +00:00
parent 30eda92a53
commit a1772ca406
2 changed files with 37 additions and 31 deletions
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2
ares/CHANGES
View File

@ -6,6 +6,8 @@
/dev/urandom when built cross-compiled as then the script cannot check for
it.
- Erik Kline cleaned up ares_gethostbyaddr.c:next_lookup() somewhat
Version 1.5.1 (Nov 21, 2007)
* November 21 2007 (Daniel Stenberg)

66
ares/ares_gethostbyaddr.c
View File

@ -58,6 +58,8 @@ static void addr_callback(void *arg, int status, int timeouts,
static void end_aquery(struct addr_query *aquery, int status,
struct hostent *host);
static int file_lookup(union ares_addr *addr, int family, struct hostent **host);
static void ptr_rr_name(char *name, size_t len, int family,
union ares_addr *addr);
void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen,
int family, ares_host_callback callback, void *arg)
@ -101,44 +103,18 @@ static void next_lookup(struct addr_query *aquery)
{
const char *p;
char name[128];
int a1, a2, a3, a4, status;
int status;
struct hostent *host;
unsigned long addr;
for (p = aquery->remaining_lookups; *p; p++)
{
switch (*p)
{
case 'b':
if (aquery->family == AF_INET)
{
addr = ntohl(aquery->addr.addr4.s_addr);
a1 = (int)((addr >> 24) & 0xff);
a2 = (int)((addr >> 16) & 0xff);
a3 = (int)((addr >> 8) & 0xff);
a4 = (int)(addr & 0xff);
sprintf(name, "%d.%d.%d.%d.in-addr.arpa", a4, a3, a2, a1);
aquery->remaining_lookups = p + 1;
ares_query(aquery->channel, name, C_IN, T_PTR, addr_callback,
aquery);
}
else
{
unsigned char *bytes;
bytes = (unsigned char *)&aquery->addr.addr6.s6_addr;
sprintf(name, "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.ip6.arpa",
bytes[15]&0xf, bytes[15] >> 4, bytes[14]&0xf, bytes[14] >> 4,
bytes[13]&0xf, bytes[13] >> 4, bytes[12]&0xf, bytes[12] >> 4,
bytes[11]&0xf, bytes[11] >> 4, bytes[10]&0xf, bytes[10] >> 4,
bytes[9]&0xf, bytes[9] >> 4, bytes[8]&0xf, bytes[8] >> 4,
bytes[7]&0xf, bytes[7] >> 4, bytes[6]&0xf, bytes[6] >> 4,
bytes[5]&0xf, bytes[5] >> 4, bytes[4]&0xf, bytes[4] >> 4,
bytes[3]&0xf, bytes[3] >> 4, bytes[2]&0xf, bytes[2] >> 4,
bytes[1]&0xf, bytes[1] >> 4, bytes[0]&0xf, bytes[0] >> 4);
aquery->remaining_lookups = p + 1;
ares_query(aquery->channel, name, C_IN, T_PTR, addr_callback,
aquery);
}
ptr_rr_name(name, sizeof(name), aquery->family, &aquery->addr);
aquery->remaining_lookups = p + 1;
ares_query(aquery->channel, name, C_IN, T_PTR, addr_callback,
aquery);
return;
case 'f':
status = file_lookup(&aquery->addr, aquery->family, &host);
@ -268,3 +244,31 @@ static int file_lookup(union ares_addr *addr, int family, struct hostent **host)
*host = NULL;
return status;
}
static void ptr_rr_name(char *name, size_t len, int family,
union ares_addr *addr) {
if (family == AF_INET)
{
in_addr_t s_addr = ntohl(addr->addr4.s_addr);
int a1 = (int)((s_addr >> 24) & 0xff);
int a2 = (int)((s_addr >> 16) & 0xff);
int a3 = (int)((s_addr >> 8) & 0xff);
int a4 = (int)(s_addr & 0xff);
snprintf(name, len, "%d.%d.%d.%d.in-addr.arpa", a4, a3, a2, a1);
}
else
{
unsigned char *bytes = (unsigned char *)&addr->addr6.s6_addr;
snprintf(name, len,
"%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x."
"%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.ip6.arpa",
bytes[15]&0xf, bytes[15] >> 4, bytes[14]&0xf, bytes[14] >> 4,
bytes[13]&0xf, bytes[13] >> 4, bytes[12]&0xf, bytes[12] >> 4,
bytes[11]&0xf, bytes[11] >> 4, bytes[10]&0xf, bytes[10] >> 4,
bytes[9]&0xf, bytes[9] >> 4, bytes[8]&0xf, bytes[8] >> 4,
bytes[7]&0xf, bytes[7] >> 4, bytes[6]&0xf, bytes[6] >> 4,
bytes[5]&0xf, bytes[5] >> 4, bytes[4]&0xf, bytes[4] >> 4,
bytes[3]&0xf, bytes[3] >> 4, bytes[2]&0xf, bytes[2] >> 4,
bytes[1]&0xf, bytes[1] >> 4, bytes[0]&0xf, bytes[0] >> 4);
}
}