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meta-netmodule-wlan/recipes-connectivity/hostapd/files/030-driver_nl80211-rewrite-...

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From e5583c6d58d48ab01ee6fcd2086cb60448828cb8 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 28 Jul 2021 05:49:46 +0200
Subject: [PATCH] driver_nl80211: rewrite neigh code to not depend on
libnl3-route
Removes an unnecessary dependency and also makes the code smaller
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
src/drivers/driver_nl80211.c | 148 ++++++++++++++---------------------
1 file changed, 58 insertions(+), 90 deletions(-)
diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index d62d685f4..de6a6c2f6 100644
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -16,9 +16,6 @@
#include <net/if.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/ctrl.h>
-#ifdef CONFIG_LIBNL3_ROUTE
-#include <netlink/route/neighbour.h>
-#endif /* CONFIG_LIBNL3_ROUTE */
#include <linux/rtnetlink.h>
#include <netpacket/packet.h>
#include <linux/errqueue.h>
@@ -5333,26 +5330,29 @@ fail:
static void rtnl_neigh_delete_fdb_entry(struct i802_bss *bss, const u8 *addr)
{
-#ifdef CONFIG_LIBNL3_ROUTE
struct wpa_driver_nl80211_data *drv = bss->drv;
- struct rtnl_neigh *rn;
- struct nl_addr *nl_addr;
+ struct ndmsg nhdr = {
+ .ndm_state = NUD_PERMANENT,
+ .ndm_ifindex = bss->ifindex,
+ .ndm_family = AF_BRIDGE,
+ };
+ struct nl_msg *msg;
int err;
- rn = rtnl_neigh_alloc();
- if (!rn)
+ msg = nlmsg_alloc_simple(RTM_DELNEIGH, NLM_F_CREATE);
+ if (!msg)
return;
- rtnl_neigh_set_family(rn, AF_BRIDGE);
- rtnl_neigh_set_ifindex(rn, bss->ifindex);
- nl_addr = nl_addr_build(AF_BRIDGE, (void *) addr, ETH_ALEN);
- if (!nl_addr) {
- rtnl_neigh_put(rn);
- return;
- }
- rtnl_neigh_set_lladdr(rn, nl_addr);
+ if (nlmsg_append(msg, &nhdr, sizeof(nhdr), NLMSG_ALIGNTO) < 0)
+ goto errout;
+
+ if (nla_put(msg, NDA_LLADDR, ETH_ALEN, (void *)addr))
+ goto errout;
+
+ if (nl_send_auto_complete(drv->rtnl_sk, msg) < 0)
+ goto errout;
- err = rtnl_neigh_delete(drv->rtnl_sk, rn, 0);
+ err = nl_wait_for_ack(drv->rtnl_sk);
if (err < 0) {
wpa_printf(MSG_DEBUG, "nl80211: bridge FDB entry delete for "
MACSTR " ifindex=%d failed: %s", MAC2STR(addr),
@@ -5362,9 +5362,8 @@ static void rtnl_neigh_delete_fdb_entry(struct i802_bss *bss, const u8 *addr)
MACSTR, MAC2STR(addr));
}
- nl_addr_put(nl_addr);
- rtnl_neigh_put(rn);
-#endif /* CONFIG_LIBNL3_ROUTE */
+errout:
+ nlmsg_free(msg);
}
@@ -7747,7 +7746,6 @@ static void *i802_init(struct hostapd_data *hapd,
(params->num_bridge == 0 || !params->bridge[0]))
add_ifidx(drv, br_ifindex, drv->ifindex);
-#ifdef CONFIG_LIBNL3_ROUTE
if (bss->added_if_into_bridge || bss->already_in_bridge) {
int err;
@@ -7764,7 +7762,6 @@ static void *i802_init(struct hostapd_data *hapd,
goto failed;
}
}
-#endif /* CONFIG_LIBNL3_ROUTE */
if (drv->capa.flags2 & WPA_DRIVER_FLAGS2_CONTROL_PORT_RX) {
wpa_printf(MSG_DEBUG,
@@ -10797,13 +10794,14 @@ static int wpa_driver_br_add_ip_neigh(void *priv, u8 version,
const u8 *ipaddr, int prefixlen,
const u8 *addr)
{
-#ifdef CONFIG_LIBNL3_ROUTE
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
- struct rtnl_neigh *rn;
- struct nl_addr *nl_ipaddr = NULL;
- struct nl_addr *nl_lladdr = NULL;
- int family, addrsize;
+ struct ndmsg nhdr = {
+ .ndm_state = NUD_PERMANENT,
+ .ndm_ifindex = bss->br_ifindex,
+ };
+ struct nl_msg *msg;
+ int addrsize;
int res;
if (!ipaddr || prefixlen == 0 || !addr)
@@ -10822,85 +10820,66 @@ static int wpa_driver_br_add_ip_neigh(void *priv, u8 version,
}
if (version == 4) {
- family = AF_INET;
+ nhdr.ndm_family = AF_INET;
addrsize = 4;
} else if (version == 6) {
- family = AF_INET6;
+ nhdr.ndm_family = AF_INET6;
addrsize = 16;
} else {
return -EINVAL;
}
- rn = rtnl_neigh_alloc();
- if (rn == NULL)
+ msg = nlmsg_alloc_simple(RTM_NEWNEIGH, NLM_F_CREATE);
+ if (!msg)
return -ENOMEM;
- /* set the destination ip address for neigh */
- nl_ipaddr = nl_addr_build(family, (void *) ipaddr, addrsize);
- if (nl_ipaddr == NULL) {
- wpa_printf(MSG_DEBUG, "nl80211: nl_ipaddr build failed");
- res = -ENOMEM;
+ res = -ENOMEM;
+ if (nlmsg_append(msg, &nhdr, sizeof(nhdr), NLMSG_ALIGNTO) < 0)
goto errout;
- }
- nl_addr_set_prefixlen(nl_ipaddr, prefixlen);
- res = rtnl_neigh_set_dst(rn, nl_ipaddr);
- if (res) {
- wpa_printf(MSG_DEBUG,
- "nl80211: neigh set destination addr failed");
+
+ if (nla_put(msg, NDA_DST, addrsize, (void *)ipaddr))
goto errout;
- }
- /* set the corresponding lladdr for neigh */
- nl_lladdr = nl_addr_build(AF_BRIDGE, (u8 *) addr, ETH_ALEN);
- if (nl_lladdr == NULL) {
- wpa_printf(MSG_DEBUG, "nl80211: neigh set lladdr failed");
- res = -ENOMEM;
+ if (nla_put(msg, NDA_LLADDR, ETH_ALEN, (void *)addr))
goto errout;
- }
- rtnl_neigh_set_lladdr(rn, nl_lladdr);
- rtnl_neigh_set_ifindex(rn, bss->br_ifindex);
- rtnl_neigh_set_state(rn, NUD_PERMANENT);
+ res = nl_send_auto_complete(drv->rtnl_sk, msg);
+ if (res < 0)
+ goto errout;
- res = rtnl_neigh_add(drv->rtnl_sk, rn, NLM_F_CREATE);
+ res = nl_wait_for_ack(drv->rtnl_sk);
if (res) {
wpa_printf(MSG_DEBUG,
"nl80211: Adding bridge ip neigh failed: %s",
nl_geterror(res));
}
errout:
- if (nl_lladdr)
- nl_addr_put(nl_lladdr);
- if (nl_ipaddr)
- nl_addr_put(nl_ipaddr);
- if (rn)
- rtnl_neigh_put(rn);
+ nlmsg_free(msg);
return res;
-#else /* CONFIG_LIBNL3_ROUTE */
- return -1;
-#endif /* CONFIG_LIBNL3_ROUTE */
}
static int wpa_driver_br_delete_ip_neigh(void *priv, u8 version,
const u8 *ipaddr)
{
-#ifdef CONFIG_LIBNL3_ROUTE
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
- struct rtnl_neigh *rn;
- struct nl_addr *nl_ipaddr;
- int family, addrsize;
+ struct ndmsg nhdr = {
+ .ndm_state = NUD_PERMANENT,
+ .ndm_ifindex = bss->br_ifindex,
+ };
+ struct nl_msg *msg;
+ int addrsize;
int res;
if (!ipaddr)
return -EINVAL;
if (version == 4) {
- family = AF_INET;
+ nhdr.ndm_family = AF_INET;
addrsize = 4;
} else if (version == 6) {
- family = AF_INET6;
+ nhdr.ndm_family = AF_INET6;
addrsize = 16;
} else {
return -EINVAL;
@@ -10918,41 +10897,30 @@ static int wpa_driver_br_delete_ip_neigh(void *priv, u8 version,
return -1;
}
- rn = rtnl_neigh_alloc();
- if (rn == NULL)
+ msg = nlmsg_alloc_simple(RTM_DELNEIGH, NLM_F_CREATE);
+ if (!msg)
return -ENOMEM;
- /* set the destination ip address for neigh */
- nl_ipaddr = nl_addr_build(family, (void *) ipaddr, addrsize);
- if (nl_ipaddr == NULL) {
- wpa_printf(MSG_DEBUG, "nl80211: nl_ipaddr build failed");
- res = -ENOMEM;
+ res = -ENOMEM;
+ if (nlmsg_append(msg, &nhdr, sizeof(nhdr), NLMSG_ALIGNTO) < 0)
goto errout;
- }
- res = rtnl_neigh_set_dst(rn, nl_ipaddr);
- if (res) {
- wpa_printf(MSG_DEBUG,
- "nl80211: neigh set destination addr failed");
+
+ if (nla_put(msg, NDA_DST, addrsize, (void *)ipaddr))
goto errout;
- }
- rtnl_neigh_set_ifindex(rn, bss->br_ifindex);
+ res = nl_send_auto_complete(drv->rtnl_sk, msg);
+ if (res < 0)
+ goto errout;
- res = rtnl_neigh_delete(drv->rtnl_sk, rn, 0);
+ res = nl_wait_for_ack(drv->rtnl_sk);
if (res) {
wpa_printf(MSG_DEBUG,
"nl80211: Deleting bridge ip neigh failed: %s",
nl_geterror(res));
}
errout:
- if (nl_ipaddr)
- nl_addr_put(nl_ipaddr);
- if (rn)
- rtnl_neigh_put(rn);
+ nlmsg_free(msg);
return res;
-#else /* CONFIG_LIBNL3_ROUTE */
- return -1;
-#endif /* CONFIG_LIBNL3_ROUTE */
}
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