/*
*===========================================================================
* ipnet_sysctl_route_dump_elem_len
*===========================================================================
* Description: Calculates the length needed to write down address information
* for the specified route entry.
* Parameters: rt - a route entry.
* Returns: Length in bytes.
*
*/
IP_STATIC Ip_u16
ipnet_sysctl_route_dump_elem_len(Ipnet_route_entry *rt)
{
Ip_u16 len;
Ip_u16 addr_len;
len = sizeof(struct Ipnet_rt_msghdr);
if (IPNET_ROUTE_GET_FAMILY(rt->head) == IP_AF_INET)
addr_len = sizeof(struct Ip_sockaddr_in);
else
addr_len = sizeof(struct Ip_sockaddr_in6);
/* Length of destination address */
len += addr_len;
/* Length of destination mask */
if (rt->hdr.mask)
len += addr_len;
/* Length of gateway address */
if (rt->gateway)
len += IPCOM_SA_LEN_GET(rt->gateway);
else if (IP_BIT_ISSET(rt->hdr.flags, IPNET_RTF_CLONING))
len += sizeof(struct Ip_sockaddr_dl);
return len;
}
/*
*===========================================================================
* ipnet_rtnetlink_ip6_addr_event
*===========================================================================
* Description: Status of a network interface has changed, create a IFINFO
* event on NETLNK..
* Parameters: netif - The interface.
* Returns: -
*
*/
IP_STATIC void
ipnet_rtnetlink_route_event(struct Ipnet_route_entry_struct *rt, int event)
{
Ipcom_pkt *pkt = IP_NULL;
Ipnet_netlink_mem_t mem;
int ret = -1;
int group;
if (!ipnet_netlink_pkt_alloc(&pkt, IP_NULL, IP_TRUE, &mem, 512))
return;
/* Must explicitly switch to the correct VR here */
pkt->vr_index = mem.vr = IPNET_ROUTE_GET_VR(rt->head);
#ifdef IPCOM_USE_INET
if (IPNET_ROUTE_GET_FAMILY(rt->head) == IP_AF_INET)
{
ret = ipnet_rtnetlink_ip4_route_fill_info (&mem,
rt,
0,
event,
0);
group = IP_RTNLGRP_IPV4_ROUTE;
}
#endif
#ifdef IPCOM_USE_INET6
if (IPNET_ROUTE_GET_FAMILY(rt->head) == IP_AF_INET6)
{
ret = ipnet_rtnetlink_ip6_route_fill_info (&mem,
rt,
0,
event,
0);
group = IP_RTNLGRP_IPV6_ROUTE;
}
#endif
if (ret < 0)
ipcom_pkt_free(pkt);
else
{
pkt->end += ret;
/* We're done; do report this pkt */
ipnet_rtnetlink_broadcast(pkt, group);
}
}
/*
*===========================================================================
* ipnet_sysctl_for_each_rtab_cb
*===========================================================================
* Description: Dumps all routes entries for every route table.
* Parameters: rtab - The route table to dump.
* d - The route dump parameters.
* Returns:
*
*/
IP_STATIC void
ipnet_sysctl_for_each_rtab_cb(Ipcom_route *rtab, Ipnet_sysctl_route_data *d)
{
if (d->vr != IPNET_ROUTE_GET_VR(rtab))
return;
if (d->domain != 0 && d->domain != IPNET_ROUTE_GET_FAMILY(rtab))
return;
d->table = IPNET_ROUTE_GET_TABLE(rtab);
ipcom_route_walk_tree(rtab,
(Ipcom_route_walk_cb) ipnet_sysctl_route_dump_cb,
d);
}
/*
*===========================================================================
* ipnet_sysctl_route_dump_cb
*===========================================================================
* Description: Checks if this entry should be added and adds it if it should.
* Parameters: rt - the route entry to add
* data - callback data.
* Returns: IP_FALSE (the entry should never be deleted).
*
*/
IP_STATIC Ip_bool
ipnet_sysctl_route_dump_cb(Ipnet_route_entry *rt, Ipnet_sysctl_route_data *data)
{
struct Ipnet_rt_msghdr *rt_msg;
Ip_u16 len;
if (rt->next)
(void)ipnet_sysctl_route_dump_cb(rt->next, data);
if (rt->narrow)
(void) ipnet_sysctl_route_dump_cb(rt->narrow, data);
if ((rt->hdr.flags & data->flags) != data->flags)
return IP_FALSE;
/* Do not list the 255.255.255.255, 224.0.0.0/4 or IPv6 multicast routes. */
if (IP_BIT_ISSET(rt->hdr.flags, IPNET_RTF_X_MCAST_RO | IPNET_RTF_X_BCAST_RO | IPNET_RTF_X_HIDDEN))
return IP_FALSE;
len = ipnet_sysctl_route_dump_elem_len(rt);
data->bytes_written += len;
if (data->bytes_written > data->buf_len)
{
/* Buffer to small */
if (data->buf != IP_NULL)
data->soerrno = -IP_ERRNO_ENOMEM;
return IP_FALSE;
}
rt_msg = (struct Ipnet_rt_msghdr *) data->buf;
data->buf = (Ip_u8 *) data->buf + sizeof(struct Ipnet_rt_msghdr);
ipcom_memset(rt_msg, 0, sizeof(struct Ipnet_rt_msghdr));
rt_msg->rtm_msglen = len;
rt_msg->rtm_version = IPNET_RTM_VERSION;
rt_msg->rtm_type = IPNET_RTM_GET;
rt_msg->rtm_index = rt->netif ? rt->netif->ipcom.ifindex : 0;
rt_msg->rtm_table = data->table;
rt_msg->rtm_flags = rt->hdr.flags;
rt_msg->rtm_use = rt->use;
rt_msg->rtm_rmx = rt->metrics;
/* add destination address */
IP_BIT_SET(rt_msg->rtm_addrs, IPNET_RTA_DST);
data->buf = ipnet_sysctl_route_add_addr(data->buf, IPNET_ROUTE_GET_FAMILY(rt->head), rt->hdr.key);
if (rt->gateway)
{
IP_BIT_SET(rt_msg->rtm_addrs, IPNET_RTA_GATEWAY);
ipcom_memcpy(data->buf, rt->gateway, IPCOM_SA_LEN_GET(rt->gateway));
data->buf = (Ip_u8 *) data->buf + IPCOM_SA_LEN_GET(rt->gateway);
}
else if (IP_BIT_ISSET(rt->hdr.flags, IPNET_RTF_CLONING))
{
struct Ip_sockaddr_dl *dl = data->buf;
IP_BIT_SET(rt_msg->rtm_addrs, IPNET_RTA_GATEWAY);
ipcom_memset(data->buf, 0, sizeof(struct Ip_sockaddr_dl));
IPCOM_SA_LEN_SET(dl, sizeof(struct Ip_sockaddr_dl));
dl->sdl_family = IP_AF_LINK;
ip_assert(rt->netif != IP_NULL);
if (rt->netif != IP_NULL)
{
dl->sdl_index = (Ip_u16)rt->netif->ipcom.ifindex;
dl->sdl_type = (Ip_u8)rt->netif->ipcom.type;
}
data->buf = (Ip_u8 *) data->buf + sizeof(struct Ip_sockaddr_dl);
}
if (rt->hdr.mask)
{
/* add destination mask */
IP_BIT_SET(rt_msg->rtm_addrs, IPNET_RTA_NETMASK);
data->buf = ipnet_sysctl_route_add_addr(data->buf, IPNET_ROUTE_GET_FAMILY(rt->head), rt->hdr.mask);
}
ip_assert((Ip_u16)((Ip_ptrdiff_t) data->buf - (Ip_ptrdiff_t) rt_msg) == len);
return IP_FALSE;
}
/*
*===========================================================================
* ipnet_rtnetlink_route_foreach_vr
*===========================================================================
* Description: Hash table foreach callback. Called once for each virtual
* router that exists in the system.
* Parameters: rtab - route table
* param - callback parameters.
* Returns: -
*
*/
IP_STATIC void
ipnet_rtnetlink_route_foreach_vr_family(Ipcom_route *rtab, Ipnet_rtnetlink_route_family_t *param)
{
int new_offs = 0;
Ip_ptrdiff_t table = IPNET_ROUTE_GET_TABLE(rtab);
Ip_u16 vr = IPNET_ROUTE_GET_VR(rtab);
Ipnet_route_entry *rt = IP_NULL;
/* This traversal is already aborted */
if (param->state.aborted)
return;
/* Only handle rtabs of selected address family */
if (IPNET_ROUTE_GET_FAMILY(rtab) != param->family)
return;
/* Check if specific VR shall be dumped */
if (IP_BIT_ISFALSE(param->nlmsg->nlmsg_flags, IP_NLM_F_VR_UNSPEC) && (param->mem->vr != IPCOM_VR_ANY) && (param->mem->vr != vr))
return;
/*
* If this is a trailer message buffer, make sure it
* starts dumping where the last message ended
*/
if (param->state.cont)
{
Ipnet_route_entry *rtt = (Ipnet_route_entry*)(*param->state.rt);
/* Verify current state */
if (*param->state.vr != vr || *param->state.table != table)
return;
if (rtt != IP_NULL)
{
rt = ipnet_route_first_entry(IPNET_ROUTE_GET_FAMILY(rtab),
vr,
table);
while (rt != IP_NULL)
{
if (rt == rtt)
break;
rt = ipnet_route_next_entry(rt);
}
}
}
/* Reset the continue variable; we're on the move again */
param->state.cont = 0;
/* Get first unless we've found one to continue from */
if (rt == IP_NULL)
rt = ipnet_route_first_entry(IPNET_ROUTE_GET_FAMILY(rtab),
vr,
table);
/* */
while (rt)
{
/* Do not dump the 255.255.255.255, 224.0.0.0/4 or IPv6 multicast routes. */
/* Do not dump routes that are part of multipath routes either */
if (IP_BIT_ISFALSE(rt->hdr.flags, IPNET_RTF_X_MCAST_RO | IPNET_RTF_X_BCAST_RO | IPNET_RTF_X_HIDDEN)
&& (rt->prev == IP_NULL))
{
#ifdef IPCOM_USE_INET
if (param->family == IP_AF_INET)
{
new_offs = ipnet_rtnetlink_ip4_route_fill_info (param->mem,
rt,
param->nlmsg->nlmsg_seq,
IP_RTM_NEWROUTE,
IP_NLM_F_MULTI);
}
else
#endif
#ifdef IPCOM_USE_INET6
if (param->family == IP_AF_INET6)
{
new_offs = ipnet_rtnetlink_ip6_route_fill_info (param->mem,
rt,
param->nlmsg->nlmsg_seq,
IP_RTM_NEWROUTE,
IP_NLM_F_MULTI);
}
else
#endif
{
IP_PANIC();
}
if (new_offs < 0)
goto aborted;
}
rt = ipnet_route_next_entry(rt);
/* */
if (rt && new_offs)
goto aborted;
}
return;
aborted:
param->state.aborted = 1;
*param->state.rt = (Ip_ptrdiff_t)rt;
*param->state.table = (Ip_ptrdiff_t)table;
*param->state.vr = (Ip_ptrdiff_t)vr;
}
/*
*===========================================================================
* ipnet_rtnetlink_route_foreach_vr
*===========================================================================
* Description: Hash table foreach callback. Called once for each virtual
* router that exists in the system.
* Parameters: rtab - route table
* param - callback parameters.
* Returns: -
*
*/
IP_STATIC void
ipnet_rtnetlink_neigh_foreach_vr_family(Ipcom_route *rtab, Ipnet_rtnetlink_neigh_family_t *param)
{
Ip_u16 vr = IPNET_ROUTE_GET_VR(rtab);
Ipnet_route_entry *rt = IP_NULL;
/* This traversal is already aborted */
if (param->state.aborted)
return;
/* Only handle rtabs of selected address family */
if (param->family != IP_AF_UNSPEC && IPNET_ROUTE_GET_FAMILY(rtab) != param->family)
return;
/* We only have neigh values in the default table */
if (IPNET_ROUTE_GET_TABLE(rtab) != IPCOM_ROUTE_TABLE_DEFAULT)
return;
/* Check if specific VR shall be dumped */
if (IP_BIT_ISFALSE(param->nlmsg->nlmsg_flags, IP_NLM_F_VR_UNSPEC) && (param->mem->vr != IPCOM_VR_ANY) && (param->mem->vr != vr))
return;
/*
* If this is a trailer message buffer, make sure it
* starts dumping where the last message ended
*/
if (param->state.cont)
{
Ipnet_route_entry *rtt = (Ipnet_route_entry*)(*param->state.rt);
/* Verify current state */
if (*param->state.vr != vr)
return;
if (rtt != IP_NULL)
{
rt = ipnet_route_first_entry(IPNET_ROUTE_GET_FAMILY(rtab),
vr,
IPNET_ROUTE_GET_TABLE(rtab));
while (rt != IP_NULL)
{
if (rt == rtt)
break;
rt = ipnet_route_next_entry(rt);
}
}
}
/* Reset the continue variable; we're on the move again */
param->state.cont = 0;
/* Get first unless we've found one to continue from */
if (rt == IP_NULL)
rt = ipnet_route_first_entry(IPNET_ROUTE_GET_FAMILY(rtab),
vr,
IPNET_ROUTE_GET_TABLE(rtab));
/* */
while (rt)
{
do
{
if (ipnet_rtnetlink_neigh_is(rt))
break;
rt = ipnet_route_next_entry(rt);
} while (rt != IP_NULL);
if (rt != IP_NULL)
{
int ret = 0;
/* Verify this particular NC entry */
#ifdef IPCOM_USE_INET
if (IPNET_ROUTE_GET_FAMILY(rtab) == IP_AF_INET)
ret = ipnet_rtnetlink_ip4_neigh_fill_info(param->mem, rt, param->nlmsg->nlmsg_seq, IP_RTM_NEWNEIGH, IP_NLM_F_MULTI);
#endif
#ifdef IPCOM_USE_INET6
if (IPNET_ROUTE_GET_FAMILY(rtab) == IP_AF_INET6)
ret = ipnet_rtnetlink_ip6_neigh_fill_info(param->mem, rt, param->nlmsg->nlmsg_seq, IP_RTM_NEWNEIGH, IP_NLM_F_MULTI);
#endif
if (ret < 0)
goto aborted;
/* Get next */
rt = ipnet_route_next_entry(rt);
}
}
return;
aborted:
param->state.aborted = 1;
*param->state.rt = (Ip_ptrdiff_t)rt;
*param->state.vr = (Ip_ptrdiff_t)vr;
}
