wpa_debug: Remove 2048 byte message length limit

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

src/utils/wpa_debug.c

@@ -596,10 +596,14 @@ void wpa_msg(void *ctx, int level, const char *fmt, ...)
 {
 	va_list ap;
 	char *buf;
-	const int buflen = 2048;
+	int buflen;
 	int len;
 	char prefix[130];
 
+	va_start(ap, fmt);
+	buflen = vsnprintf(NULL, 0, fmt, ap) + 1;
+	va_end(ap);
+
 	buf = os_malloc(buflen);
 	if (buf == NULL) {
 		wpa_printf(MSG_ERROR, "wpa_msg: Failed to allocate message "
@@ -630,12 +634,16 @@ void wpa_msg_ctrl(void *ctx, int level, const char *fmt, ...)
 {
 	va_list ap;
 	char *buf;
-	const int buflen = 2048;
+	int buflen;
 	int len;
 
 	if (!wpa_msg_cb)
 		return;
 
+	va_start(ap, fmt);
+	buflen = vsnprintf(NULL, 0, fmt, ap) + 1;
+	va_end(ap);
+
 	buf = os_malloc(buflen);
 	if (buf == NULL) {
 		wpa_printf(MSG_ERROR, "wpa_msg_ctrl: Failed to allocate "
@@ -654,9 +662,13 @@ void wpa_msg_global(void *ctx, int level, const char *fmt, ...)
 {
 	va_list ap;
 	char *buf;
-	const int buflen = 2048;
+	int buflen;
 	int len;
 
+	va_start(ap, fmt);
+	buflen = vsnprintf(NULL, 0, fmt, ap) + 1;
+	va_end(ap);
+
 	buf = os_malloc(buflen);
 	if (buf == NULL) {
 		wpa_printf(MSG_ERROR, "wpa_msg_global: Failed to allocate "
@@ -677,9 +689,13 @@ void wpa_msg_no_global(void *ctx, int level, const char *fmt, ...)
 {
 	va_list ap;
 	char *buf;
-	const int buflen = 2048;
+	int buflen;
 	int len;
 
+	va_start(ap, fmt);
+	buflen = vsnprintf(NULL, 0, fmt, ap) + 1;
+	va_end(ap);
+
 	buf = os_malloc(buflen);
 	if (buf == NULL) {
 		wpa_printf(MSG_ERROR, "wpa_msg_no_global: Failed to allocate "
@@ -712,9 +728,13 @@ void hostapd_logger(void *ctx, const u8 *addr, unsigned int module, int level,
 {
 	va_list ap;
 	char *buf;
-	const int buflen = 2048;
+	int buflen;
 	int len;
 
+	va_start(ap, fmt);
+	buflen = vsnprintf(NULL, 0, fmt, ap) + 1;
+	va_end(ap);
+
 	buf = os_malloc(buflen);
 	if (buf == NULL) {
 		wpa_printf(MSG_ERROR, "hostapd_logger: Failed to allocate "