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dns: listen on ipv6

This commit is contained in:
Pavel Vasin 2014-07-21 15:26:21 +04:00
parent 34fd2888bb
commit bb53306a2e
1 changed files with 20 additions and 20 deletions
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40
dns.c
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@ -18,18 +18,18 @@
#if defined IP_RECVDSTADDR
# define DSTADDR_SOCKOPT IP_RECVDSTADDR
# define DSTADDR_DATASIZE (CMSG_SPACE(sizeof(struct in_addr)))
# define DSTADDR_DATASIZE (CMSG_SPACE(sizeof(struct in6_addr)))
# define dstaddr(x) (CMSG_DATA(x))
#elif defined IP_PKTINFO
struct in_pktinfo {
unsigned int ipi_ifindex; /* Interface index */
struct in_addr ipi_spec_dst; /* Local address */
struct in_addr ipi_addr; /* Header Destination address */
};
#elif defined IPV6_PKTINFO
struct in6_pktinfo
{
struct in6_addr ipi6_addr; /* src/dst IPv6 address */
unsigned int ipi6_ifindex; /* send/recv interface index */
};
# define DSTADDR_SOCKOPT IP_PKTINFO
# define DSTADDR_DATASIZE (CMSG_SPACE(sizeof(struct in_pktinfo)))
# define dstaddr(x) (&(((struct in_pktinfo *)(CMSG_DATA(x)))->ipi_addr))
# define DSTADDR_SOCKOPT IPV6_PKTINFO
# define DSTADDR_DATASIZE (CMSG_SPACE(sizeof(struct in6_pktinfo)))
# define dstaddr(x) (&(((struct in6_pktinfo *)(CMSG_DATA(x)))->ipi6_addr))
#else
# error "can't determine socket option"
#endif
@ -366,31 +366,31 @@ error:
static int listenSocket = -1;
int dnsserver(dns_opt_t *opt) {
struct sockaddr_in si_other;
struct sockaddr_in6 si_other;
int senderSocket = -1;
senderSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
senderSocket = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (senderSocket == -1)
return -3;
int replySocket;
if (listenSocket == -1) {
struct sockaddr_in si_me;
if ((listenSocket=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))==-1) {
struct sockaddr_in6 si_me;
if ((listenSocket=socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP))==-1) {
listenSocket = -1;
return -1;
}
replySocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
replySocket = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (replySocket == -1)
{
close(listenSocket);
return -1;
}
int sockopt = 1;
setsockopt(listenSocket, IPPROTO_IP, DSTADDR_SOCKOPT, &sockopt, sizeof sockopt);
setsockopt(listenSocket, IPPROTO_IPV6, DSTADDR_SOCKOPT, &sockopt, sizeof sockopt);
memset((char *) &si_me, 0, sizeof(si_me));
si_me.sin_family = AF_INET;
si_me.sin_port = htons(opt->port);
si_me.sin_addr.s_addr = INADDR_ANY;
si_me.sin6_family = AF_INET6;
si_me.sin6_port = htons(opt->port);
si_me.sin6_addr = in6addr_any;
if (bind(listenSocket, (struct sockaddr*)&si_me, sizeof(si_me))==-1)
return -2;
}
@ -414,7 +414,7 @@ int dnsserver(dns_opt_t *opt) {
for (; 1; ++(opt->nRequests))
{
ssize_t insize = recvmsg(listenSocket, &msg, 0);
unsigned char *addr = (unsigned char*)&si_other.sin_addr.s_addr;
// unsigned char *addr = (unsigned char*)&si_other.sin_addr.s_addr;
// printf("DNS: Request %llu from %i.%i.%i.%i:%i of %i bytes\n", (unsigned long long)(opt->nRequests), addr[0], addr[1], addr[2], addr[3], ntohs(si_other.sin_port), (int)insize);
if (insize <= 0)
continue;