From 54e8e033ccf47526e5ff08f93c105ef75334924e Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sat, 13 Jan 2018 21:29:08 -0800 Subject: libaltos: Use case-insensitive compare when matching BT MACs We use the BT MAC vendor portion to figure out which port to connect to as that is simpler and takes less network traffic than actually doing discovery. However, on Windows, we were generating the address in lower case and comparing against upper case vendors, which didn't work out too well. Signed-off-by: Keith Packard --- libaltos/libaltos_common.c | 31 +++++++++++++++++++++++-------- 1 file changed, 23 insertions(+), 8 deletions(-) (limited to 'libaltos/libaltos_common.c') diff --git a/libaltos/libaltos_common.c b/libaltos/libaltos_common.c index f577de02..713a775c 100644 --- a/libaltos/libaltos_common.c +++ b/libaltos/libaltos_common.c @@ -76,24 +76,39 @@ altos_putchar(struct altos_file *file, char c) } struct bt_vendor_map { - char vendor[10]; - int port; + const char vendor[10]; + int port; }; static const struct bt_vendor_map altos_bt_vendor_map[] = { { .vendor = "00:12:6f:", 1 }, /* Rayson */ - { .vendor = "8C:DE:52:", 6 }, /* ISSC */ - { .vendor = "D8:80:39:", 6 }, /* Microchip */ + { .vendor = "8c:de:52:", 6 }, /* ISSC */ + { .vendor = "d8:80:39:", 6 }, /* Microchip */ }; #define NUM_BT_VENDOR_MAP (sizeof altos_bt_vendor_map / sizeof altos_bt_vendor_map[0]) #define BT_PORT_DEFAULT 1 +static inline int +ao_tolower(int c) { + if ('A' <= c && c <= 'Z') + return c + 'a' - 'A'; + return c; +} + int altos_bt_port(struct altos_bt_device *device) { - unsigned i; - for (i = 0; i < NUM_BT_VENDOR_MAP; i++) - if (strncmp (device->addr, altos_bt_vendor_map[i].vendor, strlen(altos_bt_vendor_map[i].vendor)) == 0) - return altos_bt_vendor_map[i].port; + unsigned i, j; + for (i = 0; i < NUM_BT_VENDOR_MAP; i++) { + const char *vendor = altos_bt_vendor_map[i].vendor; + for (j = 0; ; j++) { + if (vendor[j] == '\0') + return altos_bt_vendor_map[i].port; + if (device->addr[j] == '\0') + break; + if (ao_tolower(device->addr[j]) != vendor[j]) + break; + } + } return BT_PORT_DEFAULT; } -- cgit v1.2.3