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net/netlink: Add options to disable individual NETLINK_ROUTE commands. This will probably become quite large and will need to be higher tunable for smaller platforms.

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This commit is contained in:
Gregory Nutt
2019-11-12 10:19:42 -06:00
parent b49b07cb75
commit 3e1937b49b
2 changed files with 129 additions and 57 deletions
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net/netlink/Kconfig
+21
View File
@@ -34,6 +34,27 @@ config NETLINK_ROUTE
---help--- ---help---
Support the NETLINK_ROUTE protocol option. Support the NETLINK_ROUTE protocol option.
if NETLINK_ROUTE
config NETLINK_DISABLE_GETLINK
bool "Disable RTM_GETLINK support"
default n
---help---
RTM_GETLINK is used to enumerate network devices.
config NETLINK_DISABLE_GETNEIGH
bool "Disable RTM_GETNEIGH support"
default n
---help---
RTM_GETNEIGH is used to retrieve Neighbor/ARP tables.
config NETLINK_DISABLE_GETROUTE
bool "Disable RTM_GETROUTE support"
default n
---help---
RTM_GETROUTE is used to retrieve routing tables.
endif # NETLINK_ROUTE
endmenu # Netlink Protocols endmenu # Netlink Protocols
endif # NET_NETLINK endif # NET_NETLINK
endmenu # Netlink Socket Support endmenu # Netlink Socket Support
net/netlink/netlink_route.c
+108 -57
View File
@@ -62,9 +62,30 @@
#ifdef CONFIG_NETLINK_ROUTE #ifdef CONFIG_NETLINK_ROUTE
/**************************************************************************** /****************************************************************************
* Private Types * Pre-processor Definitions
****************************************************************************/ ****************************************************************************/
/* Configuration ************************************************************/
#if !defined(CONFIG_NET_ARP) && !defined(CONFIG_NET_IPv6)
# undef CONFIG_NETLINK_DISABLE_GETNEIGH
# define CONFIG_NETLINK_DISABLE_GETNEIGH 1
#endif
#if !defined(CONFIG_NET_ROUTE) || (!defined(CONFIG_NET_IPv4) && \
!defined(CONFIG_NET_IPv6))
# undef CONFIG_NETLINK_DISABLE_GETROUTE
# define CONFIG_NETLINK_DISABLE_GETROUTE 1
#endif
#undef NETLINK_DISABLE_NLMSGDONE
#if defined(CONFIG_NETLINK_DISABLE_GETLINK) && \
defined(CONFIG_NETLINK_DISABLE_GETROUTE)
# define NETLINK_DISABLE_NLMSGDONE 1
#endif
/* Helpers ******************************************************************/
#define IFA_RTA(r) \ #define IFA_RTA(r) \
((FAR struct rtattr *)(((FAR char *)(r)) + \ ((FAR struct rtattr *)(((FAR char *)(r)) + \
NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
@@ -235,6 +256,7 @@ struct nlroute_routeinfo_s
* *
****************************************************************************/ ****************************************************************************/
#ifndef CONFIG_NETLINK_DISABLE_GETLINK
static int netlink_device_callback(FAR struct net_driver_s *dev, static int netlink_device_callback(FAR struct net_driver_s *dev,
FAR void *arg) FAR void *arg)
{ {
@@ -413,6 +435,7 @@ static int netlink_device_callback(FAR struct net_driver_s *dev,
netlink_add_response(devinfo->psock, (FAR struct netlink_response_s *)alloc); netlink_add_response(devinfo->psock, (FAR struct netlink_response_s *)alloc);
return 0; return 0;
} }
#endif
/**************************************************************************** /****************************************************************************
* Name: netlink_get_devlist * Name: netlink_get_devlist
@@ -422,6 +445,7 @@ static int netlink_device_callback(FAR struct net_driver_s *dev,
* *
****************************************************************************/ ****************************************************************************/
#ifndef CONFIG_NETLINK_DISABLE_GETLINK
static int netlink_get_devlist(FAR struct socket *psock, static int netlink_get_devlist(FAR struct socket *psock,
FAR const struct getlink_sendto_request_s *req) FAR const struct getlink_sendto_request_s *req)
{ {
@@ -469,6 +493,7 @@ static int netlink_get_devlist(FAR struct socket *psock,
net_unlock(); net_unlock();
return OK; return OK;
} }
#endif
/**************************************************************************** /****************************************************************************
* Name: netlink_get_arptable() * Name: netlink_get_arptable()
@@ -478,7 +503,7 @@ static int netlink_get_devlist(FAR struct socket *psock,
* *
****************************************************************************/ ****************************************************************************/
#ifdef CONFIG_NET_ARP #if defined(CONFIG_NET_ARP) && !defined(CONFIG_NETLINK_DISABLE_GETNEIGH)
static int netlink_get_arptable(FAR struct socket *psock, static int netlink_get_arptable(FAR struct socket *psock,
FAR const struct getneigh_sendto_request_s *req) FAR const struct getneigh_sendto_request_s *req)
{ {
@@ -561,7 +586,7 @@ static int netlink_get_arptable(FAR struct socket *psock,
* *
****************************************************************************/ ****************************************************************************/
#ifdef CONFIG_NET_IPv6 #if defined(CONFIG_NET_IPv6) && !defined(CONFIG_NETLINK_DISABLE_GETNEIGH)
static int netlink_get_nbtable(FAR struct socket *psock, static int netlink_get_nbtable(FAR struct socket *psock,
FAR const struct getneigh_sendto_request_s *req) FAR const struct getneigh_sendto_request_s *req)
{ {
@@ -645,8 +670,7 @@ static int netlink_get_nbtable(FAR struct socket *psock,
* *
****************************************************************************/ ****************************************************************************/
#if defined(CONFIG_NET_ROUTE) && (defined(CONFIG_NET_IPv4) || \ #ifndef CONFIG_NETLINK_DISABLE_GETROUTE
defined(CONFIG_NET_IPv6))
static int netlink_route_terminator(FAR struct socket *psock, static int netlink_route_terminator(FAR struct socket *psock,
FAR const struct getroute_sendto_request_s *req) FAR const struct getroute_sendto_request_s *req)
{ {
@@ -691,7 +715,7 @@ static int netlink_route_terminator(FAR struct socket *psock,
* *
****************************************************************************/ ****************************************************************************/
#if defined(CONFIG_NET_ROUTE) && defined(CONFIG_NET_IPv4) #if defined(CONFIG_NET_IPv4) && !defined(CONFIG_NETLINK_DISABLE_GETROUTE)
static int netlink_ipv4_route(FAR struct net_route_ipv4_s *route, static int netlink_ipv4_route(FAR struct net_route_ipv4_s *route,
FAR void *arg) FAR void *arg)
{ {
@@ -753,7 +777,7 @@ static int netlink_ipv4_route(FAR struct net_route_ipv4_s *route,
* *
****************************************************************************/ ****************************************************************************/
#if defined(CONFIG_NET_ROUTE) && defined(CONFIG_NET_IPv4) #if defined(CONFIG_NET_IPv4) && !defined(CONFIG_NETLINK_DISABLE_GETROUTE)
static int netlink_get_ipv4route(FAR struct socket *psock, static int netlink_get_ipv4route(FAR struct socket *psock,
FAR const struct getroute_sendto_request_s *req) FAR const struct getroute_sendto_request_s *req)
{ {
@@ -788,7 +812,7 @@ static int netlink_get_ipv4route(FAR struct socket *psock,
* *
****************************************************************************/ ****************************************************************************/
#if defined(CONFIG_NET_ROUTE) && defined(CONFIG_NET_IPv6) #if defined(CONFIG_NET_IPv6) && !defined(CONFIG_NETLINK_DISABLE_GETROUTE)
static int netlink_ipv6_route(FAR struct net_route_ipv6_s *route, static int netlink_ipv6_route(FAR struct net_route_ipv6_s *route,
FAR void *arg) FAR void *arg)
{ {
@@ -850,7 +874,7 @@ static int netlink_ipv6_route(FAR struct net_route_ipv6_s *route,
* *
****************************************************************************/ ****************************************************************************/
#if defined(CONFIG_NET_ROUTE) && defined(CONFIG_NET_IPv6) #if defined(CONFIG_NET_IPv6) && !defined(CONFIG_NETLINK_DISABLE_GETROUTE)
static int netlink_get_ip6vroute(FAR struct socket *psock, static int netlink_get_ip6vroute(FAR struct socket *psock,
FAR const struct getroute_sendto_request_s *req) FAR const struct getroute_sendto_request_s *req)
{ {
@@ -897,6 +921,7 @@ ssize_t netlink_route_sendto(FAR struct socket *psock,
{ {
FAR const struct getneigh_sendto_request_s *gnreq = FAR const struct getneigh_sendto_request_s *gnreq =
(FAR const struct getneigh_sendto_request_s *)nlmsg; (FAR const struct getneigh_sendto_request_s *)nlmsg;
int ret;
DEBUGASSERT(psock != NULL && nlmsg != NULL && DEBUGASSERT(psock != NULL && nlmsg != NULL &&
nlmsg->nlmsg_len >= sizeof(struct nlmsghdr) && nlmsg->nlmsg_len >= sizeof(struct nlmsghdr) &&
@@ -904,76 +929,98 @@ ssize_t netlink_route_sendto(FAR struct socket *psock,
len >= nlmsg->nlmsg_len && to != NULL && len >= nlmsg->nlmsg_len && to != NULL &&
tolen >= sizeof(struct sockaddr_nl)); tolen >= sizeof(struct sockaddr_nl));
/* Dump a list of all devices */ /* Handle according to the message type */
if (gnreq->hdr.nlmsg_type == RTM_GETLINK) switch (gnreq->hdr.nlmsg_type)
{ {
FAR const struct getlink_sendto_request_s *glreq = #ifndef CONFIG_NETLINK_DISABLE_GETLINK
(FAR const struct getlink_sendto_request_s *)nlmsg; /* Dump a list of all devices */
int ret;
ret = netlink_get_devlist(psock, glreq); case RTM_GETLINK:
return ret < 0 ? ret : len; {
} FAR const struct getlink_sendto_request_s *glreq =
(FAR const struct getlink_sendto_request_s *)nlmsg;
/* Generate the response */
ret = netlink_get_devlist(psock, glreq);
}
break;
#endif
#ifndef CONFIG_NETLINK_DISABLE_GETNEIGH
/* Retrieve ARP/Neighbor Tables */
case RTM_GETNEIGH:
{
#ifdef CONFIG_NET_ARP #ifdef CONFIG_NET_ARP
/* Retrieve the ARP table in its entirety. */ /* Retrieve the ARP table in its entirety. */
else if (gnreq->hdr.nlmsg_type == RTM_GETNEIGH && if (gnreq->msg.ndm_family == AF_INET)
gnreq->msg.ndm_family == AF_INET) {
{ ret = netlink_get_arptable(psock, gnreq);
int ret = netlink_get_arptable(psock, gnreq); }
return ret < 0 ? ret : len; else
}
#endif #endif
#ifdef CONFIG_NET_IPv6 #ifdef CONFIG_NET_IPv6
/* Retrieve the IPv6 neighbor table in its entirety. */ /* Retrieve the IPv6 neighbor table in its entirety. */
else if (gnreq->hdr.nlmsg_type == RTM_GETNEIGH && if (gnreq->msg.ndm_family == AF_INET6)
gnreq->msg.ndm_family == AF_INET6) {
{ ret = netlink_get_nbtable(psock, gnreq);
int ret = netlink_get_nbtable(psock, gnreq); }
return ret < 0 ? ret : len; else
}
#endif #endif
{
ret = -EAFNOSUPPORT;
}
}
break;
#endif /* !CONFIG_NETLINK_DISABLE_GETNEIGH */
#ifdef CONFIG_NET_ROUTE #ifndef CONFIG_NETLINK_DISABLE_GETROUTE
/* Retrieve the IPv4 or IPv6 routing table */ /* Retrieve the IPv4 or IPv6 routing table */
else if (gnreq->hdr.nlmsg_type == RTM_GETROUTE) case RTM_GETROUTE:
{ {
FAR const struct getroute_sendto_request_s *grreq = FAR const struct getroute_sendto_request_s *grreq =
(FAR const struct getroute_sendto_request_s *)nlmsg; (FAR const struct getroute_sendto_request_s *)nlmsg;
int ret;
#ifdef CONFIG_NET_IPv4 #ifdef CONFIG_NET_IPv4
if (grreq->gen.rtgen_family == AF_INET) if (grreq->gen.rtgen_family == AF_INET)
{ {
ret = netlink_get_ipv4route(psock, grreq); ret = netlink_get_ipv4route(psock, grreq);
} }
else
#endif #endif
#ifdef CONFIG_NET_IPv6 #ifdef CONFIG_NET_IPv6
#ifdef CONFIG_NET_IPv4 if (grreq->gen.rtgen_family == AF_INET6)
else {
ret = netlink_get_ip6vroute(psock, grreq);
}
else
#endif #endif
if (grreq->gen.rtgen_family == AF_INET6) {
{ ret = -EAFNOSUPPORT;
ret = netlink_get_ip6vroute(psock, grreq); }
} }
break;
#endif #endif
else
{
ret = -EAFNOSUPPORT;
}
return ret < 0 ? ret : len; default:
ret = -ENOSYS;
break;
} }
#endif
/* REVISIT: Not implemented */ /* On success, return the size of the request that was processed */
return -ENOSYS; if (ret >= 0)
{
ret = len;
}
return ret;
} }
/**************************************************************************** /****************************************************************************
@@ -1022,6 +1069,7 @@ ssize_t netlink_route_recvfrom(FAR struct socket *psock,
switch (entry->msg.nlmsg_type) switch (entry->msg.nlmsg_type)
{ {
#ifndef CONFIG_NETLINK_DISABLE_GETLINK
case RTM_NEWLINK: case RTM_NEWLINK:
{ {
FAR struct getlink_recvfrom_rsplist_s *resp = FAR struct getlink_recvfrom_rsplist_s *resp =
@@ -1046,8 +1094,9 @@ ssize_t netlink_route_recvfrom(FAR struct socket *psock,
ret = resp->payload.hdr.nlmsg_len; ret = resp->payload.hdr.nlmsg_len;
} }
break; break;
#endif
#if defined(CONFIG_NET_ARP) || defined(CONFIG_NET_IPv6) #ifndef CONFIG_NETLINK_DISABLE_GETNEIGH
case RTM_GETNEIGH: case RTM_GETNEIGH:
{ {
FAR struct getneigh_recvfrom_rsplist_s *resp = FAR struct getneigh_recvfrom_rsplist_s *resp =
@@ -1074,7 +1123,7 @@ ssize_t netlink_route_recvfrom(FAR struct socket *psock,
break; break;
#endif #endif
#ifdef CONFIG_NET_ROUTE #ifndef CONFIG_NETLINK_DISABLE_GETROUTE
case RTM_NEWROUTE: case RTM_NEWROUTE:
{ {
FAR struct getroute_recvfrom_resplist_s *resp = FAR struct getroute_recvfrom_resplist_s *resp =
@@ -1101,6 +1150,7 @@ ssize_t netlink_route_recvfrom(FAR struct socket *psock,
break; break;
#endif #endif
#ifndef NETLINK_DISABLE_NLMSGDONE
case NLMSG_DONE: case NLMSG_DONE:
{ {
FAR struct nlroute_msgdone_rsplist_s *resp = FAR struct nlroute_msgdone_rsplist_s *resp =
@@ -1126,6 +1176,7 @@ ssize_t netlink_route_recvfrom(FAR struct socket *psock,
ret = sizeof(struct nlmsghdr); ret = sizeof(struct nlmsghdr);
} }
break; break;
#endif
default: default:
nerr("ERROR: Unrecognized message type: %u\n", nerr("ERROR: Unrecognized message type: %u\n",