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/*
* Copyright (C) 2003 Yasuhiro Ohara
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "log.h"
#include "memory.h"
#include "sockunion.h"
#include "sockopt.h"
#include "privs.h"
#include "lib_errors.h"
#include "vrf.h"
#include "libospf.h"
#include "ospf6_proto.h"
#include "ospf6_top.h"
#include "ospf6_network.h"
#include "ospf6d.h"
struct in6_addr allspfrouters6;
struct in6_addr alldrouters6;
/* setsockopt MulticastLoop to off */
static void ospf6_reset_mcastloop(int ospf6_sock)
{
unsigned int off = 0;
if (setsockopt(ospf6_sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &off,
sizeof(unsigned int))
< 0)
zlog_warn("Network: reset IPV6_MULTICAST_LOOP failed: %s",
safe_strerror(errno));
}
static void ospf6_set_pktinfo(int ospf6_sock)
{
setsockopt_ipv6_pktinfo(ospf6_sock, 1);
}
static void ospf6_set_transport_class(int ospf6_sock)
{
#ifdef IPTOS_PREC_INTERNETCONTROL
setsockopt_ipv6_tclass(ospf6_sock, IPTOS_PREC_INTERNETCONTROL);
#endif
}
static void ospf6_set_checksum(int ospf6_sock)
{
int offset = 12;
#ifndef DISABLE_IPV6_CHECKSUM
if (setsockopt(ospf6_sock, IPPROTO_IPV6, IPV6_CHECKSUM, &offset,
sizeof(offset))
< 0)
zlog_warn("Network: set IPV6_CHECKSUM failed: %s",
safe_strerror(errno));
#else
zlog_warn("Network: Don't set IPV6_CHECKSUM");
#endif /* DISABLE_IPV6_CHECKSUM */
}
void ospf6_serv_close(int *ospf6_sock)
{
if (*ospf6_sock != -1) {
close(*ospf6_sock);
*ospf6_sock = -1;
return;
}
}
/* Make ospf6d's server socket. */
int ospf6_serv_sock(struct ospf6 *ospf6)
{
int ospf6_sock;
if (ospf6->fd != -1)
return -1;
if (ospf6->vrf_id == VRF_UNKNOWN)
return -1;
frr_with_privs(&ospf6d_privs) {
ospf6_sock = vrf_socket(AF_INET6, SOCK_RAW, IPPROTO_OSPFIGP,
ospf6->vrf_id, ospf6->name);
if (ospf6_sock < 0) {
zlog_warn("Network: can't create OSPF6 socket.");
return -1;
}
}
/* set socket options */
#if 1
sockopt_reuseaddr(ospf6_sock);
#else
ospf6_set_reuseaddr();
#endif /*1*/
ospf6_reset_mcastloop(ospf6_sock);
ospf6_set_pktinfo(ospf6_sock);
ospf6_set_transport_class(ospf6_sock);
ospf6_set_checksum(ospf6_sock);
ospf6->fd = ospf6_sock;
/* setup global in6_addr, allspf6 and alldr6 for later use */
inet_pton(AF_INET6, ALLSPFROUTERS6, &allspfrouters6);
inet_pton(AF_INET6, ALLDROUTERS6, &alldrouters6);
return 0;
}
/* ospf6 set socket option */
int ospf6_sso(ifindex_t ifindex, struct in6_addr *group, int option, int sockfd)
{
struct ipv6_mreq mreq6;
int ret;
int bufsize = (8 * 1024 * 1024);
if (sockfd == -1)
return -1;
assert(ifindex);
mreq6.ipv6mr_interface = ifindex;
memcpy(&mreq6.ipv6mr_multiaddr, group, sizeof(struct in6_addr));
ret = setsockopt(sockfd, IPPROTO_IPV6, option, &mreq6, sizeof(mreq6));
if (ret < 0) {
flog_err_sys(
EC_LIB_SOCKET,
"Network: setsockopt (%d) on ifindex %d failed: %s",
option, ifindex, safe_strerror(errno));
return ret;
}
setsockopt_so_sendbuf(sockfd, bufsize);
setsockopt_so_recvbuf(sockfd, bufsize);
return 0;
}
static int iov_count(struct iovec *iov)
{
int i;
for (i = 0; iov[i].iov_base; i++)
;
return i;
}
static int iov_totallen(struct iovec *iov)
{
int i;
int totallen = 0;
for (i = 0; iov[i].iov_base; i++)
totallen += iov[i].iov_len;
return totallen;
}
int ospf6_sendmsg(struct in6_addr *src, struct in6_addr *dst,
ifindex_t ifindex, struct iovec *message, int ospf6_sock)
{
int retval;
struct msghdr smsghdr;
struct cmsghdr *scmsgp;
union {
struct cmsghdr hdr;
uint8_t buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
} cmsgbuf;
struct in6_pktinfo *pktinfo;
struct sockaddr_in6 dst_sin6;
assert(dst);
memset(&cmsgbuf, 0, sizeof(cmsgbuf));
scmsgp = (struct cmsghdr *)&cmsgbuf;
pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
memset(&dst_sin6, 0, sizeof(struct sockaddr_in6));
/* source address */
pktinfo->ipi6_ifindex = ifindex;
if (src)
memcpy(&pktinfo->ipi6_addr, src, sizeof(struct in6_addr));
else
memset(&pktinfo->ipi6_addr, 0, sizeof(struct in6_addr));
/* destination address */
dst_sin6.sin6_family = AF_INET6;
#ifdef SIN6_LEN
dst_sin6.sin6_len = sizeof(struct sockaddr_in6);
#endif /*SIN6_LEN*/
memcpy(&dst_sin6.sin6_addr, dst, sizeof(struct in6_addr));
dst_sin6.sin6_scope_id = ifindex;
/* send control msg */
scmsgp->cmsg_level = IPPROTO_IPV6;
scmsgp->cmsg_type = IPV6_PKTINFO;
scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
/* scmsgp = CMSG_NXTHDR (&smsghdr, scmsgp); */
/* send msg hdr */
memset(&smsghdr, 0, sizeof(smsghdr));
smsghdr.msg_iov = message;
smsghdr.msg_iovlen = iov_count(message);
smsghdr.msg_name = (caddr_t)&dst_sin6;
smsghdr.msg_namelen = sizeof(struct sockaddr_in6);
smsghdr.msg_control = (caddr_t)&cmsgbuf.buf;
smsghdr.msg_controllen = sizeof(cmsgbuf.buf);
retval = sendmsg(ospf6_sock, &smsghdr, 0);
if (retval != iov_totallen(message))
zlog_warn("sendmsg failed: source: %pI6 Dest: %pI6 ifindex: %d: %s (%d)",
src, dst, ifindex,
safe_strerror(errno), errno);
return retval;
}
int ospf6_recvmsg(struct in6_addr *src, struct in6_addr *dst,
ifindex_t *ifindex, struct iovec *message, int ospf6_sock)
{
int retval;
struct msghdr rmsghdr;
struct cmsghdr *rcmsgp;
uint8_t cmsgbuf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
struct in6_pktinfo *pktinfo;
struct sockaddr_in6 src_sin6;
rcmsgp = (struct cmsghdr *)cmsgbuf;
pktinfo = (struct in6_pktinfo *)(CMSG_DATA(rcmsgp));
memset(&src_sin6, 0, sizeof(struct sockaddr_in6));
/* receive control msg */
rcmsgp->cmsg_level = IPPROTO_IPV6;
rcmsgp->cmsg_type = IPV6_PKTINFO;
rcmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
/* rcmsgp = CMSG_NXTHDR (&rmsghdr, rcmsgp); */
/* receive msg hdr */
memset(&rmsghdr, 0, sizeof(rmsghdr));
rmsghdr.msg_iov = message;
rmsghdr.msg_iovlen = iov_count(message);
rmsghdr.msg_name = (caddr_t)&src_sin6;
rmsghdr.msg_namelen = sizeof(struct sockaddr_in6);
rmsghdr.msg_control = (caddr_t)cmsgbuf;
rmsghdr.msg_controllen = sizeof(cmsgbuf);
retval = recvmsg(ospf6_sock, &rmsghdr, MSG_DONTWAIT);
if (retval < 0) {
if (errno != EAGAIN && errno != EWOULDBLOCK)
zlog_warn("stream_recvmsg failed: %s",
safe_strerror(errno));
return retval;
} else if (retval == iov_totallen(message))
zlog_warn("recvmsg read full buffer size: %d", retval);
/* source address */
assert(src);
memcpy(src, &src_sin6.sin6_addr, sizeof(struct in6_addr));
/* destination address */
if (ifindex)
*ifindex = pktinfo->ipi6_ifindex;
if (dst)
memcpy(dst, &pktinfo->ipi6_addr, sizeof(struct in6_addr));
return retval;
}
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