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hwsim: Add user-defined rules for frames passed by medium

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Define rule structure, add the list of current rules and code to match
frames against rules and apply RSSI changes.
This commit is contained in:
Andrew Zaborowski 2017-03-10 12:29:10 +01:00 committed by Denis Kenzior
parent 7460b6e1a7
commit 3b9785dffe
1 changed files with 81 additions and 1 deletions
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82
tools/hwsim.c
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@ -88,6 +88,18 @@ enum hwsim_tx_control_flags {
#define IEEE80211_TX_RATE_TABLE_SIZE 4
struct hwsim_rule {
unsigned int id;
uint8_t source[ETH_ALEN];
uint8_t destination[ETH_ALEN];
bool source_any : 1;
bool destination_any : 1;
bool bidirectional : 1;
uint32_t frequency;
int priority;
int signal;
};
static struct l_genl *genl;
static struct l_genl_family *hwsim;
static struct l_genl_family *nl80211;
@ -107,6 +119,7 @@ static bool no_vif_attr;
static bool p2p_attr;
static const char *radio_name_attr;
static struct l_dbus *dbus;
static struct l_queue *rules;
static void do_debug(const char *str, void *user_data)
{
@ -945,6 +958,62 @@ struct hwsim_frame {
int pending_callback_count;
};
static bool radio_match_addr(const struct radio_info_rec *radio,
const uint8_t *addr)
{
if (!radio || is_multicast_addr(addr))
return !radio && is_multicast_addr(addr);
return !memcmp(addr, radio->addrs[0], ETH_ALEN) ||
!memcmp(addr, radio->addrs[1], ETH_ALEN);
}
static void process_rules(const struct radio_info_rec *src_radio,
const struct radio_info_rec *dst_radio,
struct hwsim_frame *frame)
{
const struct l_queue_entry *rule_entry;
for (rule_entry = l_queue_get_entries(rules); rule_entry;
rule_entry = rule_entry->next) {
struct hwsim_rule *rule = rule_entry->data;
if (!rule->source_any &&
!radio_match_addr(src_radio, rule->source) &&
(!rule->bidirectional ||
!radio_match_addr(dst_radio, rule->source)))
continue;
if (!rule->destination_any &&
!radio_match_addr(dst_radio,
rule->destination) &&
(!rule->bidirectional ||
!radio_match_addr(src_radio,
rule->destination)))
continue;
/*
* If source matches only because rule->bidirectional was
* true, make sure destination is "any" or matches source
* radio's address.
*/
if (!rule->source_any && rule->bidirectional &&
radio_match_addr(dst_radio, rule->source))
if (!rule->destination_any &&
!radio_match_addr(dst_radio,
rule->destination))
continue;
if (rule->frequency && rule->frequency != frame->frequency)
continue;
/* Rule deemed to match frame, apply any changes */
if (rule->signal)
frame->signal = rule->signal / 100;
}
}
struct send_frame_info {
struct hwsim_frame *frame;
struct radio_info_rec *radio;
@ -1020,9 +1089,13 @@ static void hwsim_frame_unref(struct hwsim_frame *frame)
* the returning of an ACK frame in the opposite direction.
*/
if (!(frame->flags & HWSIM_TX_CTL_NO_ACK) && frame->acked)
if (!(frame->flags & HWSIM_TX_CTL_NO_ACK) && frame->acked) {
frame->flags |= HWSIM_TX_STAT_ACK;
process_rules(frame->ack_radio, frame->src_radio,
frame);
}
send_frame_tx_info(frame);
}
@ -1077,6 +1150,9 @@ static void process_frame(struct hwsim_frame *frame)
{
const struct l_queue_entry *entry;
if (is_multicast_addr(frame->dst_ether_addr))
process_rules(frame->src_radio, NULL, frame);
for (entry = l_queue_get_entries(radio_info); entry;
entry = entry->next) {
struct radio_info_rec *radio = entry->data;
@ -1113,6 +1189,8 @@ static void process_frame(struct hwsim_frame *frame)
continue;
}
process_rules(frame->src_radio, radio, frame);
send_info = l_new(struct send_frame_info, 1);
send_info->radio = radio;
send_info->frame = hwsim_frame_ref(frame);
@ -1935,6 +2013,8 @@ int main(int argc, char *argv[])
hwsim_radio_cache_cleanup();
l_queue_destroy(rules, l_free);
done:
l_signal_remove(signal);