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/*
* PIM for Quagga
* Copyright (C) 2022 Dell Technologies Ltd
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 "privs.h"
#include "if.h"
#include "prefix.h"
#include "vty.h"
#include "plist.h"
#include "sockopt.h"
#include "lib_errors.h"
#include "lib/network.h"
#include "pimd.h"
#include "pim_mroute.h"
#include "pim_oil.h"
#include "pim_str.h"
#include "pim_time.h"
#include "pim_iface.h"
#include "pim_macro.h"
#include "pim_rp.h"
#include "pim_oil.h"
#include "pim_ssm.h"
#include "pim_sock.h"
int pim_mroute_set(struct pim_instance *pim, int enable)
{
int err;
int opt, data;
socklen_t data_len = sizeof(data);
/*
* We need to create the VRF table for the pim mroute_socket
*/
if (pim->vrf->vrf_id != VRF_DEFAULT) {
frr_with_privs (&pimd_privs) {
data = pim->vrf->data.l.table_id;
err = setsockopt(pim->mroute_socket, PIM_IPPROTO,
MRT6_TABLE, &data, data_len);
if (err) {
zlog_warn(
"%s %s: failure: setsockopt(fd=%d,PIM_IPPROTO, MRT6_TABLE=%d): errno=%d: %s",
__FILE__, __func__, pim->mroute_socket,
data, errno, safe_strerror(errno));
return -1;
}
}
}
frr_with_privs (&pimd_privs) {
opt = enable ? MRT6_INIT : MRT6_DONE;
/*
* *BSD *cares* about what value we pass down
* here
*/
data = 1;
err = setsockopt(pim->mroute_socket, PIM_IPPROTO, opt, &data,
data_len);
if (err) {
zlog_warn(
"%s %s: failure: setsockopt(fd=%d,PIM_IPPROTO,%s=%d): errno=%d: %s",
__FILE__, __func__, pim->mroute_socket,
enable ? "MRT6_INIT" : "MRT6_DONE", data, errno,
safe_strerror(errno));
return -1;
}
}
if (enable) {
/* Linux and Solaris IPV6_PKTINFO */
data = 1;
if (setsockopt(pim->mroute_socket, PIM_IPPROTO, IPV6_RECVPKTINFO,
&data, data_len)) {
zlog_warn(
"Could not set IPV6_PKTINFO on socket fd=%d: errno=%d: %s",
pim->mroute_socket, errno,
safe_strerror(errno));
}
}
setsockopt_so_recvbuf(pim->mroute_socket, 1024 * 1024 * 8);
if (set_nonblocking (pim->mroute_socket) < 0) {
zlog_warn(
"Could not set non blocking on socket fd=%d: errno=%d: %s",
pim->mroute_socket, errno,
safe_strerror(errno));
}
if (enable) {
#if defined linux
int upcalls = MRT6MSG_WRMIFWHOLE;
opt = MRT6_PIM;
err = setsockopt(pim->mroute_socket, PIM_IPPROTO, opt, &upcalls,
sizeof(upcalls));
if (err) {
zlog_warn(
"Failure to register for WHOLE and WRONGMIF upcalls %d %s",
errno, safe_strerror(errno));
return -1;
}
#else
zlog_warn(
"PIM-SM will not work properly on this platform, until the ability to receive the WHOLEPKT upcall");
#endif
}
return 0;
}
static const char *const mrt6msgtype2str[MRT6MSG_WRMIFWHOLE + 1] = {
"<unknown_upcall?>", "NOCACHE", "WRONGMIF", "WHOLEPKT", "WRMIFWHOLE"};
int pim_mroute_msg(struct pim_instance *pim, const char *buf,
size_t buf_size, ifindex_t ifindex)
{
struct interface *ifp;
const struct ip6_hdr *ip6_hdr;
const struct mrt6msg *msg;
if (buf_size < (int)sizeof(struct ip6_hdr))
return 0;
ip6_hdr = (const struct ip6_hdr *)buf;
if ((ip6_hdr->ip6_vfc & 0xf) == 0) {
msg = (const struct mrt6msg *)buf;
ifp = pim_if_find_by_vif_index(pim, msg->im6_mif);
if (!ifp)
return 0;
if (PIM_DEBUG_MROUTE) {
zlog_debug(
"%s: pim kernel upcall %s type=%d ip_p=%d from fd=%d for (S,G)=(%pI6,%pI6) on %s mifi=%d size=%ld",
__func__, mrt6msgtype2str[msg->im6_msgtype],
msg->im6_msgtype, ip6_hdr->ip6_nxt,
pim->mroute_socket, &msg->im6_src,
&msg->im6_dst, ifp->name, msg->im6_mif,
(long int)buf_size);
}
switch (msg->im6_msgtype) {
case MRT6MSG_WRONGMIF:
return pim_mroute_msg_wrongvif(pim->mroute_socket, ifp,
msg);
case MRT6MSG_NOCACHE:
return pim_mroute_msg_nocache(pim->mroute_socket, ifp,
msg);
case MRT6MSG_WHOLEPKT:
return pim_mroute_msg_wholepkt(pim->mroute_socket, ifp,
(const char *)msg);
case MRT6MSG_WRMIFWHOLE:
return pim_mroute_msg_wrvifwhole(
pim->mroute_socket, ifp, (const char *)msg);
default:
break;
}
}
return 0;
}
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