Add debug prints for wpa_supplicant ctrl_iface socket send operations
This makes it easier to track the output queue state on a control
interface socket and determine what could be causing issues with running
out of space in the buffer.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
diff --git a/wpa_supplicant/ctrl_iface_unix.c b/wpa_supplicant/ctrl_iface_unix.c
index d7e8d26..b6d5246 100644
--- a/wpa_supplicant/ctrl_iface_unix.c
+++ b/wpa_supplicant/ctrl_iface_unix.c
@@ -13,6 +13,10 @@
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
+#ifdef __linux__
+#include <sys/ioctl.h>
+#include <linux/sockios.h>
+#endif /* __linux__ */
#ifdef ANDROID
#include <cutils/sockets.h>
#endif /* ANDROID */
@@ -72,6 +76,32 @@
struct ctrl_iface_global_priv *priv);
+static void wpas_ctrl_sock_debug(const char *title, int sock, const char *buf,
+ size_t len)
+{
+#ifdef __linux__
+ socklen_t optlen;
+ int sndbuf, outq;
+ int level = MSG_DEBUG;
+
+ if (len >= 5 && os_strncmp(buf, "PONG\n", 5) == 0)
+ level = MSG_EXCESSIVE;
+
+ optlen = sizeof(sndbuf);
+ sndbuf = 0;
+ if (getsockopt(sock, SOL_SOCKET, SO_SNDBUF, &sndbuf, &optlen) < 0)
+ sndbuf = -1;
+
+ if (ioctl(sock, SIOCOUTQ, &outq) < 0)
+ outq = -1;
+
+ wpa_printf(level,
+ "CTRL-DEBUG: %s: sock=%d sndbuf=%d outq=%d send_len=%d",
+ title, sock, sndbuf, outq, (int) len);
+#endif /* __linux__ */
+}
+
+
static int wpa_supplicant_ctrl_iface_attach(struct dl_list *ctrl_dst,
struct sockaddr_un *from,
socklen_t fromlen, int global)
@@ -215,6 +245,8 @@
}
if (reply) {
+ wpas_ctrl_sock_debug("ctrl_sock-sendto", sock, reply,
+ reply_len);
if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
fromlen) < 0) {
int _errno = errno;
@@ -716,6 +748,7 @@
offsetof(struct sockaddr_un, sun_path));
msg.msg_name = (void *) &dst->addr;
msg.msg_namelen = dst->addrlen;
+ wpas_ctrl_sock_debug("ctrl_sock-sendmsg", sock, buf, len);
if (sendmsg(sock, &msg, MSG_DONTWAIT) >= 0) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor sent successfully to %s",
addr_txt);
@@ -872,6 +905,8 @@
}
if (reply) {
+ wpas_ctrl_sock_debug("global_ctrl_sock-sendto",
+ sock, reply, reply_len);
if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
fromlen) < 0) {
wpa_printf(MSG_DEBUG, "ctrl_iface sendto failed: %s",
