/* recv_msg */
int recv_msg( const int socket_fd, msg_header_t *msg,
const in_addr_t block_ip, bool *blocked )
{
int rx_bytes = 0;
// 1) read UDP message from network level
if ( ( rx_bytes = recvmsg(socket_fd, msg, 0) ) < 0 )
{
log_sys_error("recv_msg: wrong <recvmsg> call. ");
return(EX_ERR);
}
in_addr_t src_addr = get_source_address(msg);
if ( block_ip == src_addr )
{ *blocked = true; }
else
{ *blocked = false; }
return(rx_bytes);
}
static int tr_globalAddress(int af, void* addr, int* addr_len)
{
struct sockaddr_storage ss;
socklen_t sslen = sizeof(ss);
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr* sa;
socklen_t salen;
int rc;
switch (af)
{
case AF_INET:
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
evutil_inet_pton(AF_INET, "91.121.74.28", &sin.sin_addr);
sin.sin_port = htons(6969);
sa = (struct sockaddr*)&sin;
salen = sizeof(sin);
break;
case AF_INET6:
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
/* In order for address selection to work right, this should be
a native IPv6 address, not Teredo or 6to4. */
evutil_inet_pton(AF_INET6, "2001:1890:1112:1::20", &sin6.sin6_addr);
sin6.sin6_port = htons(6969);
sa = (struct sockaddr*)&sin6;
salen = sizeof(sin6);
break;
default:
return -1;
}
rc = get_source_address(sa, salen, (struct sockaddr*)&ss, &sslen);
if (rc < 0)
{
return -1;
}
if (global_unicast_address((struct sockaddr*)&ss) == 0)
{
return -1;
}
switch (af)
{
case AF_INET:
if (*addr_len < 4)
{
return -1;
}
memcpy(addr, &((struct sockaddr_in*)&ss)->sin_addr, 4);
*addr_len = 4;
return 1;
case AF_INET6:
if (*addr_len < 16)
{
return -1;
}
memcpy(addr, &((struct sockaddr_in6*)&ss)->sin6_addr, 16);
*addr_len = 16;
return 1;
default:
return -1;
}
}
