[ovs-dev] [PATCH v2 05/14] tunneling: add IPv6 support to netdev_tunnel_config
Thadeu Lima de Souza Cascardo
cascardo at redhat.com
Wed Nov 25 13:31:08 UTC 2015
From: Jiri Benc <jbenc at redhat.com>
Allow configuration of IPv6 tunnel endpoints.
v2:
[cascardo: removed support for netlink datapath configuration]
[cascardo: use IPv4 mapped IPv6 addresses]
[cascardo: use only flow, instead of flow and flow6]
v3:
Fix style and avoid cast at parse_tunnel_ip as suggested by Ben Pfaff.
Also, take advantage that smap_add_ipv6 now supports IPv4-mapped addresses.
Signed-off-by: Jiri Benc <jbenc at redhat.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at redhat.com>
Co-authored-by: Thadeu Lima de Souza Cascardo <cascardo at redhat.com>
Cc: Ben Pfaff <blp at ovn.org>
---
lib/netdev-vport.c | 89 +++++++++++++++++++++++++++++++++++++-----------------
lib/netdev.h | 4 +--
ofproto/tunnel.c | 8 ++---
3 files changed, 66 insertions(+), 35 deletions(-)
diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
index 07b72b3..204a896 100644
--- a/lib/netdev-vport.c
+++ b/lib/netdev-vport.c
@@ -222,7 +222,7 @@ netdev_vport_route_changed(void)
ovs_mutex_lock(&netdev->mutex);
/* Finds all tunnel vports. */
- if (netdev->tnl_cfg.ip_dst) {
+ if (ipv6_addr_is_set(&netdev->tnl_cfg.ipv6_dst)) {
if (tunnel_check_status_change__(netdev)) {
netdev_change_seq_changed(netdev_);
}
@@ -316,12 +316,12 @@ tunnel_check_status_change__(struct netdev_vport *netdev)
{
char iface[IFNAMSIZ];
bool status = false;
- ovs_be32 route;
- ovs_be32 gw;
+ struct in6_addr *route;
+ struct in6_addr gw;
iface[0] = '\0';
- route = netdev->tnl_cfg.ip_dst;
- if (ovs_router_lookup4(route, iface, &gw)) {
+ route = &netdev->tnl_cfg.ipv6_dst;
+ if (ovs_router_lookup(route, iface, &gw)) {
struct netdev *egress_netdev;
if (!netdev_open(iface, "system", &egress_netdev)) {
@@ -425,12 +425,44 @@ parse_key(const struct smap *args, const char *name,
}
static int
+parse_tunnel_ip(const char *value, bool accept_mcast, bool *flow,
+ struct in6_addr *ipv6, uint16_t *protocol)
+{
+ if (!strcmp(value, "flow")) {
+ *flow = true;
+ *protocol = 0;
+ return 0;
+ }
+ if (addr_is_ipv6(value)) {
+ if (lookup_ipv6(value, ipv6)) {
+ return ENOENT;
+ }
+ if (!accept_mcast && ipv6_addr_is_multicast(ipv6)) {
+ return EINVAL;
+ }
+ *protocol = ETH_TYPE_IPV6;
+ } else {
+ struct in_addr ip;
+ if (lookup_ip(value, &ip)) {
+ return ENOENT;
+ }
+ if (!accept_mcast && ip_is_multicast(ip.s_addr)) {
+ return EINVAL;
+ }
+ in6_addr_set_mapped_ipv4(ipv6, ip.s_addr);
+ *protocol = ETH_TYPE_IP;
+ }
+ return 0;
+}
+
+static int
set_tunnel_config(struct netdev *dev_, const struct smap *args)
{
struct netdev_vport *dev = netdev_vport_cast(dev_);
const char *name = netdev_get_name(dev_);
const char *type = netdev_get_type(dev_);
bool ipsec_mech_set, needs_dst_port, has_csum;
+ uint16_t dst_proto = 0, src_proto = 0;
struct netdev_tunnel_config tnl_cfg;
struct smap_node *node;
@@ -462,28 +494,26 @@ set_tunnel_config(struct netdev *dev_, const struct smap *args)
SMAP_FOR_EACH (node, args) {
if (!strcmp(node->key, "remote_ip")) {
- struct in_addr in_addr;
- if (!strcmp(node->value, "flow")) {
- tnl_cfg.ip_dst_flow = true;
- tnl_cfg.ip_dst = htonl(0);
- } else if (lookup_ip(node->value, &in_addr)) {
+ int err;
+ err = parse_tunnel_ip(node->value, false, &tnl_cfg.ip_dst_flow,
+ &tnl_cfg.ipv6_dst, &dst_proto);
+ switch (err) {
+ case ENOENT:
VLOG_WARN("%s: bad %s 'remote_ip'", name, type);
- } else if (ip_is_multicast(in_addr.s_addr)) {
- VLOG_WARN("%s: multicast remote_ip="IP_FMT" not allowed",
- name, IP_ARGS(in_addr.s_addr));
+ break;
+ case EINVAL:
+ VLOG_WARN("%s: multicast remote_ip=%s not allowed",
+ name, node->value);
return EINVAL;
- } else {
- tnl_cfg.ip_dst = in_addr.s_addr;
}
} else if (!strcmp(node->key, "local_ip")) {
- struct in_addr in_addr;
- if (!strcmp(node->value, "flow")) {
- tnl_cfg.ip_src_flow = true;
- tnl_cfg.ip_src = htonl(0);
- } else if (lookup_ip(node->value, &in_addr)) {
+ int err;
+ err = parse_tunnel_ip(node->value, true, &tnl_cfg.ip_src_flow,
+ &tnl_cfg.ipv6_src, &src_proto);
+ switch (err) {
+ case ENOENT:
VLOG_WARN("%s: bad %s 'local_ip'", name, type);
- } else {
- tnl_cfg.ip_src = in_addr.s_addr;
+ break;
}
} else if (!strcmp(node->key, "tos")) {
if (!strcmp(node->value, "inherit")) {
@@ -601,7 +631,7 @@ set_tunnel_config(struct netdev *dev_, const struct smap *args)
}
}
- if (!tnl_cfg.ip_dst && !tnl_cfg.ip_dst_flow) {
+ if (!ipv6_addr_is_set(&tnl_cfg.ipv6_dst) && !tnl_cfg.ip_dst_flow) {
VLOG_ERR("%s: %s type requires valid 'remote_ip' argument",
name, type);
return EINVAL;
@@ -611,6 +641,11 @@ set_tunnel_config(struct netdev *dev_, const struct smap *args)
name, type);
return EINVAL;
}
+ if (src_proto && dst_proto && src_proto != dst_proto) {
+ VLOG_ERR("%s: 'remote_ip' and 'local_ip' has to be of the same address family",
+ name);
+ return EINVAL;
+ }
if (!tnl_cfg.ttl) {
tnl_cfg.ttl = DEFAULT_TTL;
}
@@ -644,14 +679,14 @@ get_tunnel_config(const struct netdev *dev, struct smap *args)
tnl_cfg = netdev->tnl_cfg;
ovs_mutex_unlock(&netdev->mutex);
- if (tnl_cfg.ip_dst) {
- smap_add_format(args, "remote_ip", IP_FMT, IP_ARGS(tnl_cfg.ip_dst));
+ if (ipv6_addr_is_set(&tnl_cfg.ipv6_dst)) {
+ smap_add_ipv6(args, "remote_ip", &tnl_cfg.ipv6_dst);
} else if (tnl_cfg.ip_dst_flow) {
smap_add(args, "remote_ip", "flow");
}
- if (tnl_cfg.ip_src) {
- smap_add_format(args, "local_ip", IP_FMT, IP_ARGS(tnl_cfg.ip_src));
+ if (ipv6_addr_is_set(&tnl_cfg.ipv6_src)) {
+ smap_add_ipv6(args, "local_ip", &tnl_cfg.ipv6_src);
} else if (tnl_cfg.ip_src_flow) {
smap_add(args, "local_ip", "flow");
}
diff --git a/lib/netdev.h b/lib/netdev.h
index 0fbcb65..622e2ae 100644
--- a/lib/netdev.h
+++ b/lib/netdev.h
@@ -118,8 +118,8 @@ struct netdev_tunnel_config {
bool ip_src_flow;
bool ip_dst_flow;
- ovs_be32 ip_src;
- ovs_be32 ip_dst;
+ struct in6_addr ipv6_src;
+ struct in6_addr ipv6_dst;
uint32_t exts;
diff --git a/ofproto/tunnel.c b/ofproto/tunnel.c
index 9fa6e64..d1cf4bd 100644
--- a/ofproto/tunnel.c
+++ b/ofproto/tunnel.c
@@ -160,12 +160,8 @@ tnl_port_add__(const struct ofport_dpif *ofport, const struct netdev *netdev,
tnl_port->change_seq = netdev_get_change_seq(tnl_port->netdev);
tnl_port->match.in_key = cfg->in_key;
- if (cfg->ip_src) {
- in6_addr_set_mapped_ipv4(&tnl_port->match.ipv6_src, cfg->ip_src);
- }
- if (cfg->ip_dst) {
- in6_addr_set_mapped_ipv4(&tnl_port->match.ipv6_dst, cfg->ip_dst);
- }
+ tnl_port->match.ipv6_src = cfg->ipv6_src;
+ tnl_port->match.ipv6_dst = cfg->ipv6_dst;
tnl_port->match.ip_src_flow = cfg->ip_src_flow;
tnl_port->match.ip_dst_flow = cfg->ip_dst_flow;
tnl_port->match.pkt_mark = cfg->ipsec ? IPSEC_MARK : 0;
--
2.5.0
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