From 9896d8c116f054cebc49928404018a75c9b892cb Mon Sep 17 00:00:00 2001
From: Sergey Matyukevich <geomatsi@gmail.com>
Date: Fri, 16 Sep 2022 23:18:50 +0300
Subject: [PATCH] hostapd: use a less generic name for IEEE802.11 CRC-32 routine

Hostapd uses 'crc32' name for IEEE802.11 CRC-32 routine. This name is
too generic. Buildroot autobuilder detected build configuration that
failed to build due to the naming conflict: static linking with openssl
using zlib-ng as a zlib provider, e.g. see:
- http://autobuild.buildroot.net/results/9901df820d3afa4cde78e8ad6d62cb8ce7e69fdb/
- http://autobuild.buildroot.net/results/ac19975f0bf77f4a8ca574c374092ba81cd5a332/

Use a less generic name ieee80211_crc32 for IEEE802.11 CRC-32 routine
to avoid such naming conflicts.

Upstream: https://w1.fi/cgit/hostap/commit/?id=0c7b3814ca6070a8e930dea09fde08b4058a4ca6
Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
---
 hostapd/config_file.c | 4 ++--
 src/ap/hostapd.c      | 3 ++-
 src/ap/neighbor_db.c  | 2 +-
 src/utils/crc32.c     | 2 +-
 src/utils/crc32.h     | 2 +-
 5 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/hostapd/config_file.c b/hostapd/config_file.c
index b14728d1b..b38a84647 100644
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -2407,7 +2407,7 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 		}
 		os_memcpy(ssid->ssid, pos, ssid->ssid_len);
 		ssid->ssid_set = 1;
-		ssid->short_ssid = crc32(ssid->ssid, ssid->ssid_len);
+		ssid->short_ssid = ieee80211_crc32(ssid->ssid, ssid->ssid_len);
 	} else if (os_strcmp(buf, "ssid2") == 0) {
 		struct hostapd_ssid *ssid = &bss->ssid;
 		size_t slen;
@@ -2421,7 +2421,7 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 		os_memcpy(ssid->ssid, str, slen);
 		ssid->ssid_len = slen;
 		ssid->ssid_set = 1;
-		ssid->short_ssid = crc32(ssid->ssid, ssid->ssid_len);
+		ssid->short_ssid = ieee80211_crc32(ssid->ssid, ssid->ssid_len);
 		os_free(str);
 	} else if (os_strcmp(buf, "utf8_ssid") == 0) {
 		bss->ssid.utf8_ssid = atoi(pos) > 0;
diff --git a/src/ap/hostapd.c b/src/ap/hostapd.c
index 4b88641a2..56c8fb90e 100644
--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -1230,7 +1230,8 @@ static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 	 * Short SSID calculation is identical to FCS and it is defined in
 	 * IEEE P802.11-REVmd/D3.0, 9.4.2.170.3 (Calculating the Short-SSID).
 	 */
-	conf->ssid.short_ssid = crc32(conf->ssid.ssid, conf->ssid.ssid_len);
+	conf->ssid.short_ssid = ieee80211_crc32(conf->ssid.ssid,
+						conf->ssid.ssid_len);
 
 	if (!hostapd_drv_none(hapd)) {
 		wpa_printf(MSG_DEBUG, "Using interface %s with hwaddr " MACSTR
diff --git a/src/ap/neighbor_db.c b/src/ap/neighbor_db.c
index 229edd2a9..ef17634c3 100644
--- a/src/ap/neighbor_db.c
+++ b/src/ap/neighbor_db.c
@@ -136,7 +136,7 @@ int hostapd_neighbor_set(struct hostapd_data *hapd, const u8 *bssid,
 
 	os_memcpy(entry->bssid, bssid, ETH_ALEN);
 	os_memcpy(&entry->ssid, ssid, sizeof(entry->ssid));
-	entry->short_ssid = crc32(ssid->ssid, ssid->ssid_len);
+	entry->short_ssid = ieee80211_crc32(ssid->ssid, ssid->ssid_len);
 
 	entry->nr = wpabuf_dup(nr);
 	if (!entry->nr)
diff --git a/src/utils/crc32.c b/src/utils/crc32.c
index 12d9e2a70..371254994 100644
--- a/src/utils/crc32.c
+++ b/src/utils/crc32.c
@@ -72,7 +72,7 @@ static const u32 crc32_table[256] = {
 };
 
 
-u32 crc32(const u8 *frame, size_t frame_len)
+u32 ieee80211_crc32(const u8 *frame, size_t frame_len)
 {
 	size_t i;
 	u32 crc;
diff --git a/src/utils/crc32.h b/src/utils/crc32.h
index dc31399be..71a19dc5f 100644
--- a/src/utils/crc32.h
+++ b/src/utils/crc32.h
@@ -9,6 +9,6 @@
 #ifndef CRC32_H
 #define CRC32_H
 
-u32 crc32(const u8 *frame, size_t frame_len);
+u32 ieee80211_crc32(const u8 *frame, size_t frame_len);
 
 #endif /* CRC32_H */
-- 
2.37.1