348 lines
10 KiB
C
348 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Topology:
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* ---------
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* NS0 namespace | NS1 namespace | NS2 namespace
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* | |
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* +---------------+ | +---------------+ |
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* | ipsec0 |---------| ipsec0 | |
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* | 192.168.1.100 | | | 192.168.1.200 | |
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* | if_id: bpf | | +---------------+ |
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* +---------------+ | |
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* | | | +---------------+
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* | | | | ipsec0 |
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* \------------------------------------------| 192.168.1.200 |
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* | | +---------------+
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* | |
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* | | (overlay network)
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* ------------------------------------------------------
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* | | (underlay network)
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* +--------------+ | +--------------+ |
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* | veth01 |----------| veth10 | |
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* | 172.16.1.100 | | | 172.16.1.200 | |
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* ---------------+ | +--------------+ |
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* | |
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* +--------------+ | | +--------------+
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* | veth02 |-----------------------------------| veth20 |
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* | 172.16.2.100 | | | | 172.16.2.200 |
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* +--------------+ | | +--------------+
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*
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*
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* Test Packet flow
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* -----------
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* The tests perform 'ping 192.168.1.200' from the NS0 namespace:
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* 1) request is routed to NS0 ipsec0
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* 2) NS0 ipsec0 tc egress BPF program is triggered and sets the if_id based
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* on the requested value. This makes the ipsec0 device in external mode
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* select the destination tunnel
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* 3) ping reaches the other namespace (NS1 or NS2 based on which if_id was
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* used) and response is sent
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* 4) response is received on NS0 ipsec0, tc ingress program is triggered and
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* records the response if_id
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* 5) requested if_id is compared with received if_id
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*/
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#include <net/if.h>
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#include <linux/rtnetlink.h>
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#include <linux/if_link.h>
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#include "test_progs.h"
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#include "network_helpers.h"
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#include "xfrm_info.skel.h"
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#define NS0 "xfrm_test_ns0"
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#define NS1 "xfrm_test_ns1"
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#define NS2 "xfrm_test_ns2"
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#define IF_ID_0_TO_1 1
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#define IF_ID_0_TO_2 2
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#define IF_ID_1 3
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#define IF_ID_2 4
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#define IP4_ADDR_VETH01 "172.16.1.100"
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#define IP4_ADDR_VETH10 "172.16.1.200"
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#define IP4_ADDR_VETH02 "172.16.2.100"
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#define IP4_ADDR_VETH20 "172.16.2.200"
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#define ESP_DUMMY_PARAMS \
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"proto esp aead 'rfc4106(gcm(aes))' " \
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"0xe4d8f4b4da1df18a3510b3781496daa82488b713 128 mode tunnel "
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static int attach_tc_prog(struct bpf_tc_hook *hook, int igr_fd, int egr_fd)
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{
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LIBBPF_OPTS(bpf_tc_opts, opts1, .handle = 1, .priority = 1,
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.prog_fd = igr_fd);
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LIBBPF_OPTS(bpf_tc_opts, opts2, .handle = 1, .priority = 1,
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.prog_fd = egr_fd);
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int ret;
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ret = bpf_tc_hook_create(hook);
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if (!ASSERT_OK(ret, "create tc hook"))
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return ret;
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if (igr_fd >= 0) {
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hook->attach_point = BPF_TC_INGRESS;
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ret = bpf_tc_attach(hook, &opts1);
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if (!ASSERT_OK(ret, "bpf_tc_attach")) {
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bpf_tc_hook_destroy(hook);
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return ret;
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}
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}
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if (egr_fd >= 0) {
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hook->attach_point = BPF_TC_EGRESS;
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ret = bpf_tc_attach(hook, &opts2);
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if (!ASSERT_OK(ret, "bpf_tc_attach")) {
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bpf_tc_hook_destroy(hook);
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return ret;
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}
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}
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return 0;
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}
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static void cleanup(void)
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{
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SYS_NOFAIL("test -f /var/run/netns/" NS0 " && ip netns delete " NS0);
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SYS_NOFAIL("test -f /var/run/netns/" NS1 " && ip netns delete " NS1);
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SYS_NOFAIL("test -f /var/run/netns/" NS2 " && ip netns delete " NS2);
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}
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static int config_underlay(void)
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{
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SYS(fail, "ip netns add " NS0);
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SYS(fail, "ip netns add " NS1);
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SYS(fail, "ip netns add " NS2);
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/* NS0 <-> NS1 [veth01 <-> veth10] */
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SYS(fail, "ip link add veth01 netns " NS0 " type veth peer name veth10 netns " NS1);
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SYS(fail, "ip -net " NS0 " addr add " IP4_ADDR_VETH01 "/24 dev veth01");
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SYS(fail, "ip -net " NS0 " link set dev veth01 up");
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SYS(fail, "ip -net " NS1 " addr add " IP4_ADDR_VETH10 "/24 dev veth10");
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SYS(fail, "ip -net " NS1 " link set dev veth10 up");
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/* NS0 <-> NS2 [veth02 <-> veth20] */
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SYS(fail, "ip link add veth02 netns " NS0 " type veth peer name veth20 netns " NS2);
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SYS(fail, "ip -net " NS0 " addr add " IP4_ADDR_VETH02 "/24 dev veth02");
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SYS(fail, "ip -net " NS0 " link set dev veth02 up");
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SYS(fail, "ip -net " NS2 " addr add " IP4_ADDR_VETH20 "/24 dev veth20");
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SYS(fail, "ip -net " NS2 " link set dev veth20 up");
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return 0;
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fail:
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return -1;
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}
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static int setup_xfrm_tunnel_ns(const char *ns, const char *ipv4_local,
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const char *ipv4_remote, int if_id)
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{
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/* State: local -> remote */
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SYS(fail, "ip -net %s xfrm state add src %s dst %s spi 1 "
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ESP_DUMMY_PARAMS "if_id %d", ns, ipv4_local, ipv4_remote, if_id);
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/* State: local <- remote */
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SYS(fail, "ip -net %s xfrm state add src %s dst %s spi 1 "
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ESP_DUMMY_PARAMS "if_id %d", ns, ipv4_remote, ipv4_local, if_id);
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/* Policy: local -> remote */
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SYS(fail, "ip -net %s xfrm policy add dir out src 0.0.0.0/0 dst 0.0.0.0/0 "
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"if_id %d tmpl src %s dst %s proto esp mode tunnel if_id %d", ns,
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if_id, ipv4_local, ipv4_remote, if_id);
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/* Policy: local <- remote */
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SYS(fail, "ip -net %s xfrm policy add dir in src 0.0.0.0/0 dst 0.0.0.0/0 "
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"if_id %d tmpl src %s dst %s proto esp mode tunnel if_id %d", ns,
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if_id, ipv4_remote, ipv4_local, if_id);
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return 0;
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fail:
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return -1;
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}
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static int setup_xfrm_tunnel(const char *ns_a, const char *ns_b,
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const char *ipv4_a, const char *ipv4_b,
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int if_id_a, int if_id_b)
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{
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return setup_xfrm_tunnel_ns(ns_a, ipv4_a, ipv4_b, if_id_a) ||
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setup_xfrm_tunnel_ns(ns_b, ipv4_b, ipv4_a, if_id_b);
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}
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static struct rtattr *rtattr_add(struct nlmsghdr *nh, unsigned short type,
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unsigned short len)
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{
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struct rtattr *rta =
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(struct rtattr *)((uint8_t *)nh + RTA_ALIGN(nh->nlmsg_len));
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rta->rta_type = type;
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rta->rta_len = RTA_LENGTH(len);
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nh->nlmsg_len = RTA_ALIGN(nh->nlmsg_len) + RTA_ALIGN(rta->rta_len);
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return rta;
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}
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static struct rtattr *rtattr_add_str(struct nlmsghdr *nh, unsigned short type,
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const char *s)
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{
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struct rtattr *rta = rtattr_add(nh, type, strlen(s));
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memcpy(RTA_DATA(rta), s, strlen(s));
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return rta;
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}
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static struct rtattr *rtattr_begin(struct nlmsghdr *nh, unsigned short type)
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{
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return rtattr_add(nh, type, 0);
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}
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static void rtattr_end(struct nlmsghdr *nh, struct rtattr *attr)
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{
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uint8_t *end = (uint8_t *)nh + nh->nlmsg_len;
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attr->rta_len = end - (uint8_t *)attr;
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}
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static int setup_xfrmi_external_dev(const char *ns)
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{
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struct {
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struct nlmsghdr nh;
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struct ifinfomsg info;
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unsigned char data[128];
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} req;
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struct rtattr *link_info, *info_data;
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struct nstoken *nstoken;
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int ret = -1, sock = -1;
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struct nlmsghdr *nh;
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memset(&req, 0, sizeof(req));
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nh = &req.nh;
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nh->nlmsg_len = NLMSG_LENGTH(sizeof(req.info));
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nh->nlmsg_type = RTM_NEWLINK;
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nh->nlmsg_flags |= NLM_F_CREATE | NLM_F_REQUEST;
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rtattr_add_str(nh, IFLA_IFNAME, "ipsec0");
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link_info = rtattr_begin(nh, IFLA_LINKINFO);
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rtattr_add_str(nh, IFLA_INFO_KIND, "xfrm");
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info_data = rtattr_begin(nh, IFLA_INFO_DATA);
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rtattr_add(nh, IFLA_XFRM_COLLECT_METADATA, 0);
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rtattr_end(nh, info_data);
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rtattr_end(nh, link_info);
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nstoken = open_netns(ns);
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if (!ASSERT_OK_PTR(nstoken, "setns"))
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goto done;
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sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
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if (!ASSERT_GE(sock, 0, "netlink socket"))
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goto done;
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ret = send(sock, nh, nh->nlmsg_len, 0);
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if (!ASSERT_EQ(ret, nh->nlmsg_len, "netlink send length"))
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goto done;
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ret = 0;
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done:
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if (sock != -1)
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close(sock);
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if (nstoken)
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close_netns(nstoken);
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return ret;
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}
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static int config_overlay(void)
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{
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if (setup_xfrm_tunnel(NS0, NS1, IP4_ADDR_VETH01, IP4_ADDR_VETH10,
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IF_ID_0_TO_1, IF_ID_1))
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goto fail;
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if (setup_xfrm_tunnel(NS0, NS2, IP4_ADDR_VETH02, IP4_ADDR_VETH20,
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IF_ID_0_TO_2, IF_ID_2))
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goto fail;
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/* Older iproute2 doesn't support this option */
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if (!ASSERT_OK(setup_xfrmi_external_dev(NS0), "xfrmi"))
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goto fail;
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SYS(fail, "ip -net " NS0 " addr add 192.168.1.100/24 dev ipsec0");
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SYS(fail, "ip -net " NS0 " link set dev ipsec0 up");
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SYS(fail, "ip -net " NS1 " link add ipsec0 type xfrm if_id %d", IF_ID_1);
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SYS(fail, "ip -net " NS1 " addr add 192.168.1.200/24 dev ipsec0");
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SYS(fail, "ip -net " NS1 " link set dev ipsec0 up");
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SYS(fail, "ip -net " NS2 " link add ipsec0 type xfrm if_id %d", IF_ID_2);
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SYS(fail, "ip -net " NS2 " addr add 192.168.1.200/24 dev ipsec0");
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SYS(fail, "ip -net " NS2 " link set dev ipsec0 up");
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return 0;
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fail:
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return -1;
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}
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static int test_xfrm_ping(struct xfrm_info *skel, u32 if_id)
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{
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skel->bss->req_if_id = if_id;
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SYS(fail, "ping -i 0.01 -c 3 -w 10 -q 192.168.1.200 > /dev/null");
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if (!ASSERT_EQ(skel->bss->resp_if_id, if_id, "if_id"))
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goto fail;
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return 0;
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fail:
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return -1;
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}
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static void _test_xfrm_info(void)
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{
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LIBBPF_OPTS(bpf_tc_hook, tc_hook, .attach_point = BPF_TC_INGRESS);
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int get_xfrm_info_prog_fd, set_xfrm_info_prog_fd;
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struct nstoken *nstoken = NULL;
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struct xfrm_info *skel;
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int ifindex;
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/* load and attach bpf progs to ipsec dev tc hook point */
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skel = xfrm_info__open_and_load();
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if (!ASSERT_OK_PTR(skel, "xfrm_info__open_and_load"))
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goto done;
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nstoken = open_netns(NS0);
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if (!ASSERT_OK_PTR(nstoken, "setns " NS0))
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goto done;
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ifindex = if_nametoindex("ipsec0");
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if (!ASSERT_NEQ(ifindex, 0, "ipsec0 ifindex"))
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goto done;
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tc_hook.ifindex = ifindex;
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set_xfrm_info_prog_fd = bpf_program__fd(skel->progs.set_xfrm_info);
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get_xfrm_info_prog_fd = bpf_program__fd(skel->progs.get_xfrm_info);
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if (!ASSERT_GE(set_xfrm_info_prog_fd, 0, "bpf_program__fd"))
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goto done;
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if (!ASSERT_GE(get_xfrm_info_prog_fd, 0, "bpf_program__fd"))
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goto done;
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if (attach_tc_prog(&tc_hook, get_xfrm_info_prog_fd,
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set_xfrm_info_prog_fd))
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goto done;
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/* perform test */
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if (!ASSERT_EQ(test_xfrm_ping(skel, IF_ID_0_TO_1), 0, "ping " NS1))
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goto done;
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if (!ASSERT_EQ(test_xfrm_ping(skel, IF_ID_0_TO_2), 0, "ping " NS2))
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goto done;
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done:
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if (nstoken)
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close_netns(nstoken);
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xfrm_info__destroy(skel);
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}
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void test_xfrm_info(void)
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{
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cleanup();
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if (!ASSERT_OK(config_underlay(), "config_underlay"))
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goto done;
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if (!ASSERT_OK(config_overlay(), "config_overlay"))
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goto done;
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if (test__start_subtest("xfrm_info"))
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_test_xfrm_info();
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done:
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cleanup();
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}
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