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Temporary OSPFv3 development commit (changing multicast support).

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This commit is contained in:
Ondrej Zajicek
2009-09-04 11:06:51 +02:00
parent d2ceaf4ec8
commit f9c799a00e
18 changed files with 412 additions and 336 deletions
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148
sysdep/linux/sysio.h
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@@ -38,28 +38,34 @@ set_inaddr(struct in_addr *ia, ip_addr a)
* ways. Horrible.
*/
static inline char *sysio_mcast_setup(sock *s)
{
int zero = 0;
if (ipa_nonzero(s->daddr))
{
if (
#ifdef IP_DEFAULT_MULTICAST_TTL
s->ttl != IP_DEFAULT_MULTICAST_TTL &&
#endif
setsockopt(s->fd, SOL_IP, IP_MULTICAST_TTL, &s->ttl, sizeof(s->ttl)) < 0)
return "IP_MULTICAST_TTL";
if (
#ifdef IP_DEFAULT_MULTICAST_LOOP
IP_DEFAULT_MULTICAST_LOOP &&
#endif
setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
return "IP_MULTICAST_LOOP";
}
return NULL;
#if defined(CONFIG_LINUX_MC_MREQ) || defined(CONFIG_LINUX_MC_MREQ_BIND)
/*
* Older kernels support only struct mreq which matches interfaces by their
* addresses and thus fails on unnumbered devices. On newer 2.0 kernels
* we can use SO_BINDTODEVICE to circumvent this problem.
*/
#define MREQ_IFA struct in_addr
#define MREQ_GRP struct ip_mreq
static inline void fill_mreq_ifa(struct in_addr *m, struct iface *ifa, UNUSED ip_addr maddr)
{
set_inaddr(m, ifa->addr->ip);
}
static inline void fill_mreq_grp(struct ip_mreq *m, struct iface *ifa, ip_addr maddr)
{
bzero(m, sizeof(*m));
#ifdef CONFIG_LINUX_MC_MREQ_BIND
m->imr_interface.s_addr = INADDR_ANY;
#else
set_inaddr(&m->imr_interface, ifa->addr->ip);
#endif
set_inaddr(&m->imr_multiaddr, maddr);
}
#endif
#ifdef CONFIG_LINUX_MC_MREQN
/*
* 2.1 and newer kernels use struct mreqn which passes ifindex, so no
@@ -76,70 +82,78 @@ struct ip_mreqn
};
#endif
static inline char *sysio_mcast_join(sock *s)
{
struct ip_mreqn mreq;
char *err;
struct ifreq ifr;
#define MREQ_IFA struct ip_mreqn
#define MREQ_GRP struct ip_mreqn
#define fill_mreq_ifa fill_mreq
#define fill_mreq_grp fill_mreq
if (err = sysio_mcast_setup(s))
return err;
strcpy(ifr.ifr_name, s->iface->name);
if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
return "SO_BINDTODEVICE";
mreq.imr_ifindex = s->iface->index;
set_inaddr(&mreq.imr_address, s->iface->addr->ip);
set_inaddr(&mreq.imr_multiaddr, s->daddr);
/* This defines where should we send _outgoing_ multicasts */
if (ipa_nonzero(s->daddr) && setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0)
return "IP_MULTICAST_IF";
/* And this one sets interface for _receiving_ multicasts from */
if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
return "IP_ADD_MEMBERSHIP";
return NULL;
static inline fill_mreq(struct ip_mreqn *m, struct iface *ifa, ip_addr maddr)
{
bzero(m, sizeof(*m));
m->imr_ifindex = ifa->index;
set_inaddr(&m->imr_address, ifa->addr->ip);
set_inaddr(&m->imr_multiaddr, maddr);
}
#endif
#if defined(CONFIG_LINUX_MC_MREQ) || defined(CONFIG_LINUX_MC_MREQ_BIND)
/*
* Older kernels support only struct mreq which matches interfaces by their
* addresses and thus fails on unnumbered devices. On newer 2.0 kernels
* we can use SO_BINDTODEVICE to circumvent this problem.
*/
static inline char *sysio_mcast_join(sock *s)
static inline char *
sysio_setup_multicast(sock *s)
{
struct in_addr mreq;
struct ip_mreq mreq_add;
char *err;
MREQ_IFA m;
int zero = 0;
if (err = sysio_mcast_setup(s))
return err;
set_inaddr(&mreq, s->iface->addr->ip);
#ifdef CONFIG_LINUX_MC_MREQ_BIND
if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
return "IP_MULTICAST_LOOP";
if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_TTL, &s->ttl, sizeof(s->ttl)) < 0)
return "IP_MULTICAST_TTL";
/* This defines where should we send _outgoing_ multicasts */
fill_mreq_ifa(&m, s->iface, IPA_NONE);
if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0)
return "IP_MULTICAST_IF";
#if defined(CONFIG_LINUX_MC_MREQ_BIND) || defined(CONFIG_LINUX_MC_MREQN)
{
struct ifreq ifr;
strcpy(ifr.ifr_name, s->iface->name);
if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
return "SO_BINDTODEVICE";
mreq_add.imr_interface.s_addr = INADDR_ANY;
}
#else
mreq_add.imr_interface = mreq;
#endif
set_inaddr(&mreq_add.imr_multiaddr, s->daddr);
/* This defines where should we send _outgoing_ multicasts */
if (ipa_nonzero(s->daddr) && setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq)) < 0)
return "IP_MULTICAST_IF";
/* And this one sets interface for _receiving_ multicasts from */
if (ipa_nonzero(s->saddr) && setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq_add, sizeof(mreq_add)) < 0)
return "IP_ADD_MEMBERSHIP";
return NULL;
}
#endif
return NULL;
}
static inline char *
sysio_join_group(sock *s, ip_addr maddr)
{
MREQ_GRP m;
/* And this one sets interface for _receiving_ multicasts from */
fill_mreq_grp(&m, s->iface, maddr);
if (setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &m, sizeof(m)) < 0)
return "IP_ADD_MEMBERSHIP";
return NULL;
}
static inline char *
sysio_leave_group(sock *s, ip_addr maddr)
{
MREQ_GRP m;
/* And this one sets interface for _receiving_ multicasts from */
fill_mreq_grp(&m, s->iface, maddr);
if (setsockopt(s->fd, SOL_IP, IP_DROP_MEMBERSHIP, &m, sizeof(m)) < 0)
return "IP_DROP_MEMBERSHIP";
return NULL;
}
#endif
#include <linux/socket.h>
#include <linux/tcp.h>