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

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);