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nl80211: Fix libnl error string fetching

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libnl functions return a library specific error value in libnl 2.0 and
newer. errno is not necessarily valid in all error cases and strerror()
for the returned value is not valid either.

Use nl_geterror() to get the correct error string from the returned
error code.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2020-01-02 16:50:50 +02:00
parent 139f7ab311
commit 3ea58a0548
1 changed files with 31 additions and 17 deletions
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48
src/drivers/driver_nl80211.c
View file

@ -123,10 +123,13 @@ static void nl80211_register_eloop_read(struct nl_sock **handle,
* to hostapd and STA entry deletion. Try to increase the buffer to make
* this less likely to occur.
*/
if (nl_socket_set_buffer_size(*handle, 262144, 0) < 0) {
int err;
err = nl_socket_set_buffer_size(*handle, 262144, 0);
if (err < 0) {
wpa_printf(MSG_DEBUG,
"nl80211: Could not set nl_socket RX buffer size: %s",
strerror(errno));
nl_geterror(err));
/* continue anyway with the default (smaller) buffer */
}
@ -372,8 +375,16 @@ static int send_and_recv(struct nl80211_global *global,
NETLINK_CAP_ACK, &opt, sizeof(opt));
err = nl_send_auto_complete(nl_handle, msg);
if (err < 0)
if (err < 0) {
wpa_printf(MSG_INFO,
"nl80211: nl_send_auto_complete() failed: %s",
nl_geterror(err));
/* Need to convert libnl error code to an errno value. For now,
* just hardcode this to EBADF; the real error reason is shown
* in that error print above. */
err = -EBADF;
goto out;
}
err = 1;
@ -389,8 +400,8 @@ static int send_and_recv(struct nl80211_global *global,
int res = nl_recvmsgs(nl_handle, cb);
if (res < 0) {
wpa_printf(MSG_INFO,
"nl80211: %s->nl_recvmsgs failed: %d",
__func__, res);
"nl80211: %s->nl_recvmsgs failed: %d (%s)",
__func__, res, nl_geterror(res));
}
}
out:
@ -1689,7 +1700,7 @@ static int wpa_driver_nl80211_init_nl_global(struct nl80211_global *global)
if (ret < 0) {
wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
"membership for scan events: %d (%s)",
ret, strerror(-ret));
ret, nl_geterror(ret));
goto err;
}
@ -1699,7 +1710,7 @@ static int wpa_driver_nl80211_init_nl_global(struct nl80211_global *global)
if (ret < 0) {
wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
"membership for mlme events: %d (%s)",
ret, strerror(-ret));
ret, nl_geterror(ret));
goto err;
}
@ -1709,7 +1720,7 @@ static int wpa_driver_nl80211_init_nl_global(struct nl80211_global *global)
if (ret < 0) {
wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
"membership for regulatory events: %d (%s)",
ret, strerror(-ret));
ret, nl_geterror(ret));
/* Continue without regulatory events */
}
@ -1719,7 +1730,7 @@ static int wpa_driver_nl80211_init_nl_global(struct nl80211_global *global)
if (ret < 0) {
wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
"membership for vendor events: %d (%s)",
ret, strerror(-ret));
ret, nl_geterror(ret));
/* Continue without vendor events */
}
@ -1764,7 +1775,7 @@ static void nl80211_check_global(struct nl80211_global *global)
if (ret < 0) {
wpa_printf(MSG_INFO,
"nl80211: Could not re-add multicast membership for %s events: %d (%s)",
groups[i], ret, strerror(-ret));
groups[i], ret, nl_geterror(ret));
}
}
}
@ -5144,7 +5155,7 @@ static int wpa_driver_nl80211_hapd_send_eapol(
if (res < 0) {
wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
"failed: %d (%s)",
(unsigned long) len, errno, strerror(errno));
(unsigned long) len, res, strerror(res));
}
os_free(hdr);
@ -7034,15 +7045,18 @@ static void *i802_init(struct hostapd_data *hapd,
#ifdef CONFIG_LIBNL3_ROUTE
if (bss->added_if_into_bridge || bss->already_in_bridge) {
int err;
drv->rtnl_sk = nl_socket_alloc();
if (drv->rtnl_sk == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate nl_sock");
goto failed;
}
if (nl_connect(drv->rtnl_sk, NETLINK_ROUTE)) {
err = nl_connect(drv->rtnl_sk, NETLINK_ROUTE);
if (err) {
wpa_printf(MSG_ERROR, "nl80211: Failed to connect nl_sock to NETLINK_ROUTE: %s",
strerror(errno));
nl_geterror(err));
goto failed;
}
}
@ -9937,7 +9951,7 @@ static int wpa_driver_br_add_ip_neigh(void *priv, u8 version,
if (res) {
wpa_printf(MSG_DEBUG,
"nl80211: Adding bridge ip neigh failed: %s",
strerror(errno));
nl_geterror(res));
}
errout:
if (nl_lladdr)
@ -10013,7 +10027,7 @@ static int wpa_driver_br_delete_ip_neigh(void *priv, u8 version,
if (res) {
wpa_printf(MSG_DEBUG,
"nl80211: Deleting bridge ip neigh failed: %s",
strerror(errno));
nl_geterror(res));
}
errout:
if (nl_ipaddr)
@ -10262,7 +10276,7 @@ static int wpa_driver_do_acs(void *priv, struct drv_acs_params *params)
if (ret) {
wpa_printf(MSG_DEBUG,
"nl80211: Failed to invoke driver ACS function: %s",
strerror(errno));
strerror(-ret));
}
return ret;
}
@ -10309,7 +10323,7 @@ static int nl80211_set_band(void *priv, enum set_band band)
if (ret) {
wpa_printf(MSG_DEBUG,
"nl80211: Driver setband function failed: %s",
strerror(errno));
strerror(-ret));
}
return ret;
}