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Support raw mode for both IPv4 and IPv6

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Read destination address of IP request packet and return it.
Check length in client and use it as IPv4 or v6 depending on length.
This commit is contained in:
Erik Ekman
2015-06-28 22:41:54 +02:00
parent 7a51b22909
commit b4e9148df8
7 changed files with 126 additions and 71 deletions
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5
src/common.c
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@@ -173,7 +173,7 @@ get_addr(char *host, int port, int addr_family, int flags, struct sockaddr_stora
int
open_dns(struct sockaddr_storage *sockaddr, size_t sockaddr_len)
{
int flag = 1;
int flag;
int fd;
if ((fd = socket(sockaddr->ss_family, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
@@ -187,9 +187,6 @@ open_dns(struct sockaddr_storage *sockaddr, size_t sockaddr_len)
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));
fd_set_close_on_exec(fd);
#endif