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dns: create sockcmp function.

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This commit is contained in:
Elizabeth Myers 2016-03-10 06:32:25 -06:00
parent 1c99f551e3
commit b3265d7afb
2 changed files with 36 additions and 23 deletions
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57
authd/dns.c
View file

@ -29,6 +29,7 @@ format_address(struct rb_sockaddr_storage *addr, char *buffer, size_t length)
{
rb_inet_ntop_sock((struct sockaddr *)addr, buffer, length);
}
#ifdef RB_IPV6
else if(GET_SS_FAMILY(addr) == AF_INET6)
{
char tmpbuf[length];
@ -43,6 +44,32 @@ format_address(struct rb_sockaddr_storage *addr, char *buffer, size_t length)
else
rb_strlcpy(buffer, tmpbuf, length);
}
#endif
}
bool
sockcmp(struct rb_sockaddr_storage *addr, struct rb_sockaddr_storage *addr2, int family)
{
if(family == AF_INET)
{
struct sockaddr_in *ip, *ip2;
ip = (struct sockaddr_in *)addr;
ip2 = (struct sockaddr_in *)addr2;
return ip->sin_addr.s_addr == ip2->sin_addr.s_addr;
}
#ifdef RB_IPV6
else if(family == AF_INET6)
{
struct sockaddr_in6 *ip, *ip2;
ip = (struct sockaddr_in6 *) addr;
ip2 = (struct sockaddr_in6 *) addr2;
return(memcmp(&ip->sin6_addr, &ip2->sin6_addr, sizeof(struct in6_addr)) == 0);
}
#endif
return false;
}
static void
@ -51,6 +78,7 @@ submit_dns_answer(void *userdata, struct DNSReply *reply)
struct dns_request *req = userdata;
char response[64] = "*";
char status = 'E';
int family = AF_INET;
if (reply == NULL)
{
@ -66,34 +94,17 @@ submit_dns_answer(void *userdata, struct DNSReply *reply)
format_address(&reply->addr, response, sizeof(response));
break;
#endif
case 'R':
{
struct sockaddr_in *ip, *ip_fwd;
ip = (struct sockaddr_in *) &req->addr;
ip_fwd = (struct sockaddr_in *) &reply->addr;
if(ip->sin_addr.s_addr == ip_fwd->sin_addr.s_addr && strlen(reply->h_name) < 63)
{
rb_strlcpy(response, reply->h_name, sizeof(response));
status = 'O';
}
}
break;
#ifdef RB_IPV6
case 'S':
family = AF_INET6;
#endif
case 'R':
if(sockcmp(&req->addr, &reply->addr, family) && strlen(reply->h_name) < 63)
{
struct sockaddr_in6 *ip, *ip_fwd;
ip = (struct sockaddr_in6 *) &req->addr;
ip_fwd = (struct sockaddr_in6 *) &reply->addr;
if(memcmp(&ip->sin6_addr, &ip_fwd->sin6_addr, sizeof(struct in6_addr)) == 0 && strlen(reply->h_name) < 63)
{
rb_strlcpy(response, reply->h_name, sizeof(response));
status = 'O';
}
rb_strlcpy(response, reply->h_name, sizeof(response));
status = 'O';
}
break;
#endif
default:
exit(7);
}

2
authd/dns.h
View file

@ -23,6 +23,7 @@
#define DNS_REQ_IDLEN 10
#include "stdinc.h"
#include "res.h"
#include "reslib.h"
@ -35,6 +36,7 @@ struct dns_request
};
extern void format_address(struct rb_sockaddr_storage *addr, char *buffer, size_t length);
extern bool sockcmp(struct rb_sockaddr_storage *addr, struct rb_sockaddr_storage *addr2, int family);
extern void resolve_dns(int parc, char *parv[]);
extern void enumerate_nameservers(const char *rid, const char letter);
extern void reload_nameservers(const char letter);