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using own routing table for installed routes (table 100, prio 100)

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This commit is contained in:
Martin Willi
2007-07-11 06:55:11 +00:00
parent 92901c74f2
commit 9ba1d73890
1 changed files with 51 additions and 1 deletions
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src/charon/kernel/kernel_interface.c
+51 -1
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@@ -51,6 +51,14 @@
#include <processing/jobs/callback_job.h>
#include <processing/jobs/roam_job.h>
/** routing table for routes installed by us */
#ifndef IPSEC_ROUTING_TABLE
#define IPSEC_ROUTING_TABLE 100
#endif
#ifndef IPSEC_ROUTING_TABLE_PRIO
#define IPSEC_ROUTING_TABLE_PRIO 100
#endif
/** kernel level protocol identifiers */
#define KERNEL_ESP 50
#define KERNEL_AH 51
@@ -1364,7 +1372,7 @@ static status_t manage_srcroute(private_kernel_interface_t *this, int nlmsg_type
msg = (struct rtmsg*)NLMSG_DATA(hdr);
msg->rtm_family = route->src_ip->get_family(route->src_ip);
msg->rtm_dst_len = route->prefixlen;
msg->rtm_table = RT_TABLE_MAIN;
msg->rtm_table = IPSEC_ROUTING_TABLE;
msg->rtm_protocol = RTPROT_STATIC;
msg->rtm_type = RTN_UNICAST;
msg->rtm_scope = RT_SCOPE_UNIVERSE;
@@ -1381,6 +1389,40 @@ static status_t manage_srcroute(private_kernel_interface_t *this, int nlmsg_type
return netlink_send_ack(this, this->socket_rt, hdr);
}
/**
* create or delete an rule to use our routing table
*/
static status_t manage_rule(private_kernel_interface_t *this, int nlmsg_type,
u_int32_t table, u_int32_t prio)
{
unsigned char request[BUFFER_SIZE];
struct nlmsghdr *hdr;
struct rtmsg *msg;
chunk_t chunk;
memset(&request, 0, sizeof(request));
hdr = (struct nlmsghdr*)request;
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
hdr->nlmsg_type = nlmsg_type;
if (nlmsg_type == RTM_NEWRULE)
{
hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
}
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
msg = (struct rtmsg*)NLMSG_DATA(hdr);
msg->rtm_table = table;
msg->rtm_family = AF_INET;
msg->rtm_protocol = RTPROT_BOOT;
msg->rtm_scope = RT_SCOPE_UNIVERSE;
msg->rtm_type = RTN_UNICAST;
chunk = chunk_from_thing(prio);
add_attribute(hdr, RTA_PRIORITY, chunk, sizeof(request));
return netlink_send_ack(this, this->socket_rt, hdr);
}
/**
* Get the nexthop gateway for dest; or the source addr if gateway = FALSE
*/
@@ -2340,6 +2382,8 @@ static status_t del_policy(private_kernel_interface_t *this,
*/
static void destroy(private_kernel_interface_t *this)
{
manage_rule(this, RTM_DELRULE, IPSEC_ROUTING_TABLE, IPSEC_ROUTING_TABLE_PRIO);
this->job->cancel(this->job);
close(this->socket_xfrm_events);
close(this->socket_xfrm);
@@ -2442,6 +2486,12 @@ kernel_interface_t *kernel_interface_create()
charon->kill(charon, "unable to get interface list");
}
if (manage_rule(this, RTM_NEWRULE, IPSEC_ROUTING_TABLE,
IPSEC_ROUTING_TABLE_PRIO) != SUCCESS)
{
DBG1(DBG_KNL, "unable to create routing table rule");
}
return &this->public;
}