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Iodine: IPv6

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This commit is contained in:
Julian Kranz 2012-01-21 23:23:36 +01:00 • committed by Barak A. Pearlmutter
parent 7d3ad4cd11
commit 5c61a51d5d
3 changed files with 52 additions and 1 deletions
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43
src/common.c
View file

@ -155,6 +155,49 @@ open_dns(int localport, in_addr_t listen_ip)
return fd;
}
int
open_dns_ipv6(int localport, struct in6_addr listen_ip6)
{
struct sockaddr_in6 addr;
int flag = 1;
int fd;
memset(&addr, 0, sizeof(addr));
addr.sin6_family = AF_INET6;
addr.sin6_port = htons(localport);
/* listen_ip already in network byte order from inet_addr, or 0 */
addr.sin6_addr = listen_ip6;
if ((fd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
fprintf(stderr, "got fd %d\n", fd);
err(1, "socket");
}
flag = 1;
#ifdef SO_REUSEPORT
setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (const void*) &flag, sizeof(flag));
#endif
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const void*) &flag, sizeof(flag));
#ifndef WINDOWS32
/* To get destination address from each UDP datagram, see iodined.c:read_dns() */
setsockopt(fd, IPPROTO_IP, DSTADDR_SOCKOPT, (const void*) &flag, sizeof(flag));
#endif
#ifdef IP_OPT_DONT_FRAG
/* Set dont-fragment ip header flag */
flag = DONT_FRAG_VALUE;
setsockopt(fd, IPPROTO_IP, IP_OPT_DONT_FRAG, (const void*) &flag, sizeof(flag));
#endif
if(bind(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0)
err(1, "bind");
fprintf(stderr, "Opened IPv6 UDP socket\n");
return fd;
}
void
close_dns(int fd)
{

1
src/common.h
View file

@ -110,6 +110,7 @@ enum connection {
void check_superuser(void (*usage_fn)(void));
int open_dns(int, in_addr_t);
int open_dns_ipv6(int localport, struct in6_addr listen_ip6);
void close_dns(int);
void do_chroot(char *);

9
src/iodined.c
View file

@ -2289,6 +2289,9 @@ main(int argc, char **argv)
int dnsd_fd;
int tun_fd;
int v6_listen;
/* settings for forwarding normal DNS to
* local real DNS server */
int bind_fd;
@ -2324,6 +2327,7 @@ main(int argc, char **argv)
pidfile = NULL;
#ifdef LINUX
v6 = 0;
v6_listen = 1;
#endif
b32 = get_base32_encoder();
@ -2592,10 +2596,13 @@ main(int argc, char **argv)
#endif
free((void*) other_ip);
}
if ((dnsd_fd = open_dns(port, listen_ip)) == -1) {
if ((dnsd_fd = v6_listen ? open_dns_ipv6(port, in6addr_any) : open_dns(port, listen_ip)) == -1) {
retval = 1;
goto cleanup2;
}
/**
* Todo: IPv6?
*/
if (bind_enable) {
if ((bind_fd = open_dns(0, INADDR_ANY)) == -1) {
retval = 1;