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nl80211: support phy lookup by macaddr and phy name

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Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
This commit is contained in:
Jo-Philipp Wich 2014-10-27 15:08:10 +01:00
parent 95e334e8af
commit 32dad1a63a
1 changed files with 97 additions and 28 deletions
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125
iwinfo_nl80211.c
View file

@ -24,6 +24,7 @@
#include <limits.h>
#include <glob.h>
#include <fnmatch.h>
#include "iwinfo_nl80211.h"
#define min(x, y) ((x) < (y)) ? (x) : (y)
@ -125,6 +126,27 @@ static int nl80211_readint(const char *path)
return rv;
}
static int nl80211_readstr(const char *path, char *buffer, int length)
{
int fd;
int rv = -1;
if ((fd = open(path, O_RDONLY)) > -1)
{
if ((rv = read(fd, buffer, length - 1)) > 0)
{
if (buffer[rv - 1] == '\n')
rv--;
buffer[rv] = 0;
}
close(fd);
}
return rv;
}
static int nl80211_msg_error(struct sockaddr_nl *nla,
struct nlmsgerr *err, void *arg)
@ -210,45 +232,92 @@ 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_path(struct uci_section *s)
{
const char *opt;
char buf[128];
int idx = -1;
glob_t gl;
opt = uci_lookup_option_string(uci_ctx, s, "path");
if (!opt)
return -1;
snprintf(buf, sizeof(buf), "/sys/devices/%s/ieee80211/*/index", opt); /**/
if (glob(buf, 0, NULL, &gl))
return -1;
if (gl.gl_pathc > 0)
idx = nl80211_readint(gl.gl_pathv[0]);
globfree(&gl);
return idx;
}
static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s)
{
const char *opt;
char buf[128];
int i, idx = -1;
glob_t gl;
opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
if (!opt)
return -1;
snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*", opt); /**/
if (glob(buf, 0, NULL, &gl))
return -1;
for (i = 0; i < gl.gl_pathc; i++)
{
snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
continue;
if (fnmatch(opt, buf, FNM_CASEFOLD))
continue;
snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
if ((idx = nl80211_readint(buf)) > -1)
break;
}
globfree(&gl);
return idx;
}
static int nl80211_phy_idx_from_uci_phy(struct uci_section *s)
{
const char *opt;
char buf[128];
opt = uci_lookup_option_string(uci_ctx, s, "phy");
if (!opt)
return -1;
snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
return nl80211_readint(buf);
}
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;
idx = nl80211_phy_idx_from_uci_path(s);
snprintf(buf, sizeof(buf), "/sys/devices/%s/ieee80211/*/index", opt);
err = glob(buf, 0, NULL, &gl);
if (err)
goto free;
if (idx < 0)
idx = nl80211_phy_idx_from_uci_macaddr(s);
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);
if (idx < 0)
idx = nl80211_phy_idx_from_uci_phy(s);
free:
iwinfo_uci_free();