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|
/* $Id$ */
#include "netsys_c.h"
/**********************************************************************/
/* Multicast */
/**********************************************************************/
/* This works also for win32 */
#ifndef PF_INET
#define PF_INET AF_INET
#endif
#ifndef PF_INET6
#define PF_INET6 AF_INET6
#endif
#ifndef IPPROTO_IPV6
#define IPPROTO_IPV6 41
#endif
static int socket_domain(int fd) {
/* Return the socket domain, PF_INET or PF_INET6. Fails for non-IP
protos.
fd must be a socket!
*/
union sock_addr_union addr;
socklen_t l;
l = sizeof(addr);
if (getsockname(fd, &addr.s_gen, &l) == -1)
uerror("getsockname", Nothing);
switch (addr.s_gen.sa_family) {
case AF_INET:
return PF_INET;
#ifdef HAS_IPV6
case AF_INET6:
return PF_INET6;
#endif
default:
invalid_argument("Not an Internet socket");
}
return 0;
}
CAMLprim value netsys_mcast_set_loop(value fd, value flag) {
int t, r, f;
t = socket_domain(Int_val(fd));
f = Bool_val(flag);
r = 0;
switch (t) {
#ifdef IP_MULTICAST_LOOP
case PF_INET:
r = setsockopt(Int_val(fd),
IPPROTO_IP,
IP_MULTICAST_LOOP,
(void *) &f, sizeof(f));
break;
#endif
#ifdef HAS_IPV6
#ifdef IPV6_MULTICAST_LOOP
case PF_INET6:
r = setsockopt(Int_val(fd),
IPPROTO_IPV6,
IPV6_MULTICAST_LOOP,
(void *) &f, sizeof(f));
break;
#endif
#endif
default:
invalid_argument("Netsys.mcast_set_loop");
};
if (r == -1)
uerror("setsockopt",Nothing);
return Val_unit;
}
CAMLprim value netsys_mcast_set_ttl(value fd, value ttl) {
int t, r, v;
int fd_sock;
#ifdef _WIN32
if (Descr_kind_val(fd) != KIND_SOCKET)
invalid_argument("Netsys.mcast_set_ttl");
fd_sock = Socket_val(fd);
#else
fd_sock = Int_val(fd);
#endif
t = socket_domain(fd_sock);
v = Int_val(ttl);
r = 0;
switch (t) {
#ifdef IP_MULTICAST_TTL
case PF_INET:
r = setsockopt(fd_sock,
IPPROTO_IP,
IP_MULTICAST_TTL,
(void *) &v, sizeof(v));
break;
#endif
#ifdef HAS_IPV6
#ifdef IPV6_MULTICAST_HOPS
case PF_INET6:
r = setsockopt(fd_sock,
IPPROTO_IPV6,
IPV6_MULTICAST_HOPS,
(void *) &v, sizeof(v));
break;
#endif
#endif
default:
invalid_argument("Netsys.mcast_set_ttl");
};
if (r == -1)
uerror("setsockopt",Nothing);
return Val_unit;
}
CAMLprim value netsys_mcast_add_membership(value fd,
value group_addr,
value if_addr) {
int t, r;
int fd_sock;
#ifdef _WIN32
if (Descr_kind_val(fd) != KIND_SOCKET)
invalid_argument("Netsys.mcast_add_membership");
fd_sock = Socket_val(fd);
#else
fd_sock = Int_val(fd);
#endif
t = socket_domain(fd_sock);
r = 0;
switch (t) {
#ifdef IP_ADD_MEMBERSHIP
case PF_INET: {
struct ip_mreq mreq;
if (string_length(group_addr) != 4 || string_length(if_addr) != 4 )
invalid_argument("Netsys.mcast_add_membership: Not an IPV4 address");
memcpy(&mreq.imr_multiaddr,
&GET_INET_ADDR(group_addr),
4);
memcpy(&mreq.imr_interface,
&GET_INET_ADDR(if_addr),
4);
r = setsockopt(fd_sock,
IPPROTO_IP,
IP_ADD_MEMBERSHIP,
(void *) &mreq, sizeof(mreq));
break;
}
#endif
#ifdef HAS_IPV6
#ifdef IPV6_ADD_MEMBERSHIP
case PF_INET6: {
struct ipv6_mreq mreq;
if (string_length(group_addr) != 16 || string_length(if_addr) != 16 )
invalid_argument("Netsys.mcast_add_membership: Not an IPV6 address");
memcpy(&mreq.ipv6mr_multiaddr,
&GET_INET6_ADDR(group_addr),
16);
/*
memcpy(&mreq.ipv6mr_interface,
&GET_INET6_ADDR(if_addr),
16);
*/
mreq.ipv6mr_interface = 0; /* FIXME */
r = setsockopt(fd_sock,
IPPROTO_IPV6,
IPV6_ADD_MEMBERSHIP,
(void *) &mreq, sizeof(mreq));
break;
}
#endif
#endif
default:
invalid_argument("Netsys.mcast_add_membership");
};
if (r == -1)
uerror("setsockopt",Nothing);
return Val_unit;
}
CAMLprim value netsys_mcast_drop_membership(value fd,
value group_addr,
value if_addr) {
int t, r;
int fd_sock;
#ifdef _WIN32
if (Descr_kind_val(fd) != KIND_SOCKET)
invalid_argument("Netsys.mcast_drop_membership");
fd_sock = Socket_val(fd);
#else
fd_sock = Int_val(fd);
#endif
t = socket_domain(fd_sock);
r = 0;
switch (t) {
#ifdef IP_DROP_MEMBERSHIP
case PF_INET: {
struct ip_mreq mreq;
if (string_length(group_addr) != 4 || string_length(if_addr) != 4 )
invalid_argument("Netsys.mcast_drop_membership: Not an IPV4 address");
memcpy(&mreq.imr_multiaddr,
&GET_INET_ADDR(group_addr),
4);
memcpy(&mreq.imr_interface,
&GET_INET_ADDR(if_addr),
4);
r = setsockopt(fd_sock,
IPPROTO_IP,
IP_DROP_MEMBERSHIP,
(void *) &mreq, sizeof(mreq));
break;
}
#endif
#ifdef HAS_IPV6
#ifdef IPV6_DROP_MEMBERSHIP
case PF_INET6: {
struct ipv6_mreq mreq;
if (string_length(group_addr) != 16 || string_length(if_addr) != 16 )
invalid_argument("Netsys.mcast_drop_membership: Not an IPV6 address");
memcpy(&mreq.ipv6mr_multiaddr,
&GET_INET6_ADDR(group_addr),
16);
mreq.ipv6mr_interface = 0; /* FIXME */
/*
memcpy(&mreq.ipv6mr_interface,
&GET_INET6_ADDR(if_addr),
16);
*/
r = setsockopt(fd_sock,
IPPROTO_IPV6,
IPV6_DROP_MEMBERSHIP,
&mreq, sizeof(mreq));
break;
}
#endif
#endif
default:
invalid_argument("Netsys.mcast_drop_membership");
};
if (r == -1)
uerror("setsockopt",Nothing);
return Val_unit;
}
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