| Message ID | 12995b8abcf926a093ac8e59e51275b@cweb012.nm.nfra.io |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | How do I increase the max buff size of the scan_result command? | expand |
On Tue, Dec 11, 2018 at 12:06:31PM +0900, Taeyoung Kwon wrote: > There are about 200 APs in my environment. > This area is a factory, very large, with no walls. > Generally, when I scan, 140 ~ 160 scan is done. > > In this situation I check the scan list through wpa_cli. > When I check with the scan_result command, the list is checked up to a maximum of 77. > I want to check all the scan lists with the scan_result command. I would not recommend doing that with SCAN_RESULTS. Instead, the best way of fetching large scan results is by using iteration with the BSS control interface command, e.g., start with "BSS FIRST" and then continue with "BSS NEXT-<id>" to get the next entry.
Hi. Jouni Malinen I will use the bss command without using scan_result. I have confirmed that reading the scan list with the bss command from wpa_gui-qt4. I have also seen the wpa_supplicant control interface documentation. https://w1.fi/wpa_supplicant/devel/ctrl_iface_page.html In the BSS description of this document, I have confirmed your answers. The answer was very helpful. Thanks, Taeyoung Kwon -----Original Message----- From: "Jouni Malinen"<j@w1.fi> To: "Taeyoung Kwon"<xoduddk123@naver.com>; Cc: <hostap@lists.infradead.org>; Sent: 2018-12-20 (Thu) 07:24:05 Subject: Re: How do I increase the max buff size of the scan_result command? On Tue, Dec 11, 2018 at 12:06:31PM +0900, Taeyoung Kwon wrote: > There are about 200 APs in my environment. > This area is a factory, very large, with no walls. > Generally, when I scan, 140 ~ 160 scan is done. > > In this situation I check the scan list through wpa_cli. > When I check with the scan_result command, the list is checked up to a maximum of 77. > I want to check all the scan lists with the scan_result command. I would not recommend doing that with SCAN_RESULTS. Instead, the best way of fetching large scan results is by using iteration with the BSS control interface command, e.g., start with "BSS FIRST" and then continue with "BSS NEXT-<id>" to get the next entry.
diff -uNr wpa_supplicant-2.7.ori/wpa_supplicant/ctrl_iface.c wpa_supplicant-2.7.change/wpa_supplicant/ctrl_iface.c --- wpa_supplicant-2.7.ori/wpa_supplicant/ctrl_iface.c 2018-12-10 10:08:59.498290690 +0900 +++ wpa_supplicant-2.7.change/wpa_supplicant/ctrl_iface.c 2018-12-10 10:10:45.674290690 +0900 @@ -9805,7 +9805,7 @@ char *buf, size_t *resp_len) { char *reply; - const int reply_size = 4096; + const int reply_size = 65535; int reply_len; if (os_strncmp(buf, WPA_CTRL_RSP, os_strlen(WPA_CTRL_RSP)) == 0 ||
Hi There are about 200 APs in my environment. This area is a factory, very large, with no walls. Generally, when I scan, 140 ~ 160 scan is done. In this situation I check the scan list through wpa_cli. When I check with the scan_result command, the list is checked up to a maximum of 77. When I checked it, it seemed that the buff size(reply_size) was limited to 4096. In fact, if you reduce the reply_size to 128, only one list is printed. https://w1.fi/cgit/hostap/tree/wpa_supplicant/ctrl_iface.c#n9808 char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s, char *buf, size_t *resp_len) { char *reply; const int reply_size = 4096; int reply_len; I want to check all the scan lists with the scan_result command. I modified it as follows, but the results of the scan_result command did not increase. How do I view all the results of a scan with scan_result?