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iwinfo: fix handling of accessing nl80211 interfaces via radio*

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look up device path via uci instead of assuming a direct phy index

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/trunk@42759 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2014-10-05 10:26:05 +00:00 committed by Jo-Philipp Wich
parent 8ae758db52
commit fe7133f7e5
4 changed files with 99 additions and 5 deletions
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7
Makefile
View file

@ -1,5 +1,6 @@
IWINFO_BACKENDS = $(BACKENDS)
IWINFO_CFLAGS = $(CFLAGS) -std=gnu99 -fstrict-aliasing -Iinclude
IWINFO_LDFLAGS = -luci
IWINFO_LIB = libiwinfo.so
IWINFO_LIB_LDFLAGS = $(LDFLAGS) -shared
@ -36,9 +37,9 @@ endif
$(CC) $(IWINFO_CFLAGS) $(FPIC) -c -o $@ $<
compile: clean $(IWINFO_LIB_OBJ) $(IWINFO_LUA_OBJ) $(IWINFO_CLI_OBJ)
$(CC) $(IWINFO_LIB_LDFLAGS) -o $(IWINFO_LIB) $(IWINFO_LIB_OBJ)
$(CC) $(IWINFO_LUA_LDFLAGS) -o $(IWINFO_LUA) $(IWINFO_LUA_OBJ)
$(CC) $(IWINFO_CLI_LDFLAGS) -o $(IWINFO_CLI) $(IWINFO_CLI_OBJ)
$(CC) $(IWINFO_LDFLAGS) $(IWINFO_LIB_LDFLAGS) -o $(IWINFO_LIB) $(IWINFO_LIB_OBJ)
$(CC) $(IWINFO_LDFLAGS) $(IWINFO_LUA_LDFLAGS) -o $(IWINFO_LUA) $(IWINFO_LUA_OBJ)
$(CC) $(IWINFO_LDFLAGS) $(IWINFO_CLI_LDFLAGS) -o $(IWINFO_CLI) $(IWINFO_CLI_OBJ)
clean:
rm -f *.o $(IWINFO_LIB) $(IWINFO_LUA) $(IWINFO_CLI)

6
include/iwinfo/utils.h
View file

@ -21,11 +21,14 @@
#include <sys/socket.h>
#include <net/if.h>
#include <uci.h>
#include "iwinfo.h"
#define LOG10_MAGIC 1.25892541179
extern struct uci_context *uci_ctx;
int iwinfo_ioctl(int cmd, void *ifr);
int iwinfo_dbm2mw(int in);
@ -44,4 +47,7 @@ int iwinfo_hardware_id_from_mtd(struct iwinfo_hardware_id *id);
void iwinfo_parse_rsn(struct iwinfo_crypto_entry *c, uint8_t *data, uint8_t len,
uint8_t defcipher, uint8_t defauth);
struct uci_section *iwinfo_uci_get_radio(const char *name, const char *type);
void iwinfo_uci_free(void);
#endif

50
iwinfo_nl80211.c
View file

@ -23,6 +23,7 @@
*/
#include <limits.h>
#include <glob.h>
#include "iwinfo_nl80211.h"
#define min(x, y) ((x) < (y)) ? (x) : (y)
@ -209,6 +210,51 @@ static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
return nl80211_new(nls->nlctrl, cmd, flags);
}
static int nl80211_phy_idx_from_uci(const char *name)
{
struct uci_section *s;
const char *opt;
char buf[128];
glob_t gl;
FILE *f = NULL;
int idx = -1;
int err;
s = iwinfo_uci_get_radio(name, "mac80211");
if (!s)
goto free;
opt = uci_lookup_option_string(uci_ctx, s, "path");
if (!opt)
goto free;
snprintf(buf, sizeof(buf), "/sys/devices/%s/ieee80211/*/index", opt);
err = glob(buf, 0, NULL, &gl);
if (err)
goto free;
if (gl.gl_pathc)
f = fopen(gl.gl_pathv[0], "r");
globfree(&gl);
if (!f)
goto free;
err = fread(buf, 1, sizeof(buf) - 1, f);
fclose(f);
if (err <= 0)
goto free;
buf[err] = 0;
idx = atoi(buf);
free:
iwinfo_uci_free();
return idx;
}
static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
int cmd, int flags)
{
@ -224,7 +270,7 @@ static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
if (!strncmp(ifname, "phy", 3))
phyidx = atoi(&ifname[3]);
else if (!strncmp(ifname, "radio", 5))
phyidx = atoi(&ifname[5]);
phyidx = nl80211_phy_idx_from_uci(ifname);
else if (!strncmp(ifname, "mon.", 4))
ifidx = if_nametoindex(&ifname[4]);
else
@ -510,7 +556,7 @@ static char * nl80211_phy2ifname(const char *ifname)
else if (!strncmp(ifname, "phy", 3))
phyidx = atoi(&ifname[3]);
else if (!strncmp(ifname, "radio", 5))
phyidx = atoi(&ifname[5]);
phyidx = nl80211_phy_idx_from_uci(ifname);
else
return NULL;

41
iwinfo_utils.c
View file

@ -24,6 +24,7 @@
static int ioctl_socket = -1;
struct uci_context *uci_ctx = NULL;
static int iwinfo_ioctl_socket(void)
{
@ -365,3 +366,43 @@ void iwinfo_parse_rsn(struct iwinfo_crypto_entry *c, uint8_t *data, uint8_t len,
data += 2 + (count * 4);
len -= 2 + (count * 4);
}
struct uci_section *iwinfo_uci_get_radio(const char *name, const char *type)
{
struct uci_ptr ptr = {
.package = "wireless",
.section = name,
};
const char *opt;
if (!uci_ctx) {
uci_ctx = uci_alloc_context();
if (!uci_ctx)
return NULL;
}
memset(&ptr, 0, sizeof(ptr));
ptr.package = "wireless";
ptr.section = name;
if (uci_lookup_ptr(uci_ctx, &ptr, NULL, false))
return NULL;
if (!ptr.s || strcmp(ptr.s->type, "wifi-device") != 0)
return NULL;
opt = uci_lookup_option_string(uci_ctx, ptr.s, "type");
if (!opt || strcmp(opt, type) != 0)
return NULL;
return ptr.s;
}
void iwinfo_uci_free(void)
{
if (!uci_ctx)
return;
uci_free_context(uci_ctx);
uci_ctx = NULL;
}