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monitor: added scan/wiphy flags

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Specifying --noscan will filter out any scan related packets
Specifying --nowiphy will filter out any "new wiphy" packets
This commit is contained in:
James Prestwood 2018-05-15 15:08:47 -07:00 committed by Denis Kenzior
parent 2608dcae6f
commit 5c5bfbb423
3 changed files with 39 additions and 11 deletions
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18
monitor/main.c
View File

@ -49,7 +49,7 @@
static struct nlmon *nlmon = NULL;
static const char *writer_path = NULL;
static struct l_timeout *timeout = NULL;
static bool nortnl;
static struct nlmon_config config;
#define NLA_OK(nla,len) ((len) >= (int) sizeof(struct nlattr) && \
(nla)->nla_len >= sizeof(struct nlattr) && \
@ -105,7 +105,7 @@ static void genl_parse(uint16_t type, const void *data, uint32_t len,
return;
if (!strcmp(name, NL80211_GENL_NAME)) {
nlmon = nlmon_open(ifname, id, writer_path, nortnl);
nlmon = nlmon_open(ifname, id, writer_path, &config);
if (!nlmon)
l_main_quit();
}
@ -674,6 +674,8 @@ static void usage(void)
"\t-a, --analyze <file> Analyze netlink PCAP trace file\n"
"\t-i, --interface <dev> Use specified netlink monitor\n"
"\t-n, --nortnl Don't show RTNL output\n"
"\t-y, --nowiphy Don't show 'New Wiphy' output\n"
"\t-s, --noscan Don't show scan result output\n"
"\t-h, --help Show help options\n");
}
@ -684,6 +686,8 @@ static const struct option main_options[] = {
{ "nl80211", required_argument, NULL, 'F' },
{ "interface", required_argument, NULL, 'i' },
{ "nortnl", no_argument, NULL, 'n' },
{ "nowiphy", no_argument, NULL, 'y' },
{ "noscan", no_argument, NULL, 's' },
{ "version", no_argument, NULL, 'v' },
{ "help", no_argument, NULL, 'h' },
{ }
@ -703,7 +707,7 @@ int main(int argc, char *argv[])
for (;;) {
int opt;
opt = getopt_long(argc, argv, "r:w:a:F:i:nvh",
opt = getopt_long(argc, argv, "r:w:a:F:i:nvhys",
main_options, NULL);
if (opt < 0)
break;
@ -742,7 +746,13 @@ int main(int argc, char *argv[])
ifname = optarg;
break;
case 'n':
nortnl = true;
config.nortnl = true;
break;
case 'y':
config.nowiphy = true;
break;
case 's':
config.noscan = true;
break;
case 'v':
printf("%s\n", VERSION);

24
monitor/nlmon.c
View File

@ -94,6 +94,8 @@ struct nlmon {
struct l_queue *req_list;
struct pcap *pcap;
bool nortnl;
bool nowiphy;
bool noscan;
};
struct nlmon_req {
@ -3945,7 +3947,8 @@ static void netlink_str(char *str, size_t size,
}
}
static void print_message(const struct timeval *tv, enum msg_type type,
static void print_message(struct nlmon *nlmon, const struct timeval *tv,
enum msg_type type,
uint16_t flags, int status,
uint8_t cmd, uint8_t version,
const void *data, uint32_t len)
@ -3957,6 +3960,13 @@ static void print_message(const struct timeval *tv, enum msg_type type,
bool out = false;
int i;
if (nlmon->nowiphy && (cmd == NL80211_CMD_NEW_WIPHY))
return;
if (nlmon->noscan && ((cmd == NL80211_CMD_NEW_SCAN_RESULTS) ||
(cmd == NL80211_CMD_TRIGGER_SCAN)))
return;
switch (type) {
case MSG_REQUEST:
label = "Request";
@ -4099,7 +4109,7 @@ static void nlmon_message(struct nlmon *nlmon, const struct timeval *tv,
}
store_message(nlmon, tv, nlmsg);
print_message(tv, type, nlmsg->nlmsg_flags, status,
print_message(nlmon, tv, type, nlmsg->nlmsg_flags, status,
req->cmd, req->version,
NULL, sizeof(status));
nlmon_req_free(req);
@ -4128,7 +4138,7 @@ static void nlmon_message(struct nlmon *nlmon, const struct timeval *tv,
l_queue_push_tail(nlmon->req_list, req);
store_message(nlmon, tv, nlmsg);
print_message(tv, MSG_REQUEST, flags, 0,
print_message(nlmon, tv, MSG_REQUEST, flags, 0,
req->cmd, req->version,
NLMSG_DATA(nlmsg) + GENL_HDRLEN,
NLMSG_PAYLOAD(nlmsg, GENL_HDRLEN));
@ -4151,7 +4161,7 @@ static void nlmon_message(struct nlmon *nlmon, const struct timeval *tv,
}
store_message(nlmon, tv, nlmsg);
print_message(tv, type, nlmsg->nlmsg_flags, 0,
print_message(nlmon, tv, type, nlmsg->nlmsg_flags, 0,
genlmsg->cmd, genlmsg->version,
NLMSG_DATA(nlmsg) + GENL_HDRLEN,
NLMSG_PAYLOAD(nlmsg, GENL_HDRLEN));
@ -5288,7 +5298,7 @@ static struct l_io *open_pae(void)
}
struct nlmon *nlmon_open(const char *ifname, uint16_t id, const char *pathname,
bool nortnl)
const struct nlmon_config *config)
{
struct nlmon *nlmon;
struct l_io *io, *pae_io;
@ -5321,7 +5331,9 @@ struct nlmon *nlmon_open(const char *ifname, uint16_t id, const char *pathname,
nlmon->pae_io = pae_io;
nlmon->req_list = l_queue_new();
nlmon->pcap = pcap;
nlmon->nortnl = nortnl;
nlmon->nortnl = config->nortnl;
nlmon->nowiphy = config->nowiphy;
nlmon->noscan = config->noscan;
l_io_set_read_handler(nlmon->io, nlmon_receive, nlmon, NULL);
l_io_set_read_handler(nlmon->pae_io, pae_receive, nlmon, NULL);

8
monitor/nlmon.h
View File

@ -25,8 +25,14 @@
struct nlmon;
struct nlmon_config {
bool nortnl;
bool nowiphy;
bool noscan;
};
struct nlmon *nlmon_open(const char *ifname, uint16_t id, const char *pathname,
bool nortnl);
const struct nlmon_config *config);
void nlmon_close(struct nlmon *nlmon);
struct nlmon *nlmon_create(uint16_t id);