/*
* Things get complicated because we have to check if there's an egress
* shortcut with suitable traffic parameters we could use.
*/
static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry)
{
uint32_t dst_ip = msg->content.in_info.in_dst_ip;
struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip);
eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client);
if(eg_entry && eg_entry->shortcut){
if(eg_entry->shortcut->qos.txtp.traffic_class &
msg->qos.txtp.traffic_class &
(qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){
if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR)
entry->shortcut = eg_entry->shortcut;
else if(eg_entry->shortcut->qos.txtp.max_pcr > 0)
entry->shortcut = eg_entry->shortcut;
}
if(entry->shortcut){
dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(dst_ip));
client->eg_ops->put(eg_entry);
return;
}
}
if (eg_entry != NULL)
client->eg_ops->put(eg_entry);
/* No luck in the egress cache we must open an ingress SVC */
msg->type = OPEN_INGRESS_SVC;
if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class))
{
msg->qos = qos->qos;
printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name);
}
else memset(&msg->qos,0,sizeof(struct atm_qos));
msg_to_mpoad(msg, client);
return;
}
static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc)
{
struct atm_mpoa_qos *qos;
struct k_message msg;
entry->count++;
if (entry->entry_state == INGRESS_RESOLVED && entry->shortcut != NULL)
return OPEN;
if (entry->entry_state == INGRESS_REFRESHING) {
if (entry->count > mpc->parameters.mpc_p1) {
msg.type = SND_MPOA_RES_RQST;
msg.content.in_info = entry->ctrl_info;
memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN);
qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
if (qos != NULL)
msg.qos = qos->qos;
msg_to_mpoad(&msg, mpc);
do_gettimeofday(&(entry->reply_wait));
entry->entry_state = INGRESS_RESOLVING;
}
if (entry->shortcut != NULL)
return OPEN;
return CLOSED;
}
if (entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL)
return OPEN;
if (entry->count > mpc->parameters.mpc_p1 &&
entry->entry_state == INGRESS_INVALID) {
dprintk("(%s) threshold exceeded for ip %pI4, sending MPOA res req\n",
mpc->dev->name, &entry->ctrl_info.in_dst_ip);
entry->entry_state = INGRESS_RESOLVING;
msg.type = SND_MPOA_RES_RQST;
memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN);
msg.content.in_info = entry->ctrl_info;
qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
if (qos != NULL)
msg.qos = qos->qos;
msg_to_mpoad(&msg, mpc);
do_gettimeofday(&(entry->reply_wait));
}
return CLOSED;
}
/* Call this every MPC-p4 seconds. */
static void check_resolving_entries(struct mpoa_client *client)
{
struct atm_mpoa_qos *qos;
in_cache_entry *entry;
struct timeval now;
struct k_message msg;
do_gettimeofday(&now);
read_lock_bh(&client->ingress_lock);
entry = client->in_cache;
while (entry != NULL) {
if (entry->entry_state == INGRESS_RESOLVING) {
if ((now.tv_sec - entry->hold_down.tv_sec) <
client->parameters.mpc_p6) {
entry = entry->next; /* Entry in hold down */
continue;
}
if ((now.tv_sec - entry->reply_wait.tv_sec) >
entry->retry_time) {
entry->retry_time = MPC_C1 * (entry->retry_time);
/*
* Retry time maximum exceeded,
* put entry in hold down.
*/
if (entry->retry_time > client->parameters.mpc_p5) {
do_gettimeofday(&(entry->hold_down));
entry->retry_time = client->parameters.mpc_p4;
entry = entry->next;
continue;
}
/* Ask daemon to send a resolution request. */
memset(&(entry->hold_down), 0, sizeof(struct timeval));
msg.type = SND_MPOA_RES_RTRY;
memcpy(msg.MPS_ctrl, client->mps_ctrl_addr, ATM_ESA_LEN);
msg.content.in_info = entry->ctrl_info;
qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
if (qos != NULL)
msg.qos = qos->qos;
msg_to_mpoad(&msg, client);
do_gettimeofday(&(entry->reply_wait));
}
}
entry = entry->next;
}
read_unlock_bh(&client->ingress_lock);
}
static int parse_qos(const char *buff)
{
/* possible lines look like this
* add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
*/
unsigned char ip[4];
int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
uint32_t ipaddr;
struct atm_qos qos;
memset(&qos, 0, sizeof(struct atm_qos));
if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
ip, ip+1, ip+2, ip+3) == 4) {
ipaddr = *(uint32_t *)ip;
return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
}
if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
rx_pcr = tx_pcr;
rx_sdu = tx_sdu;
} else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
return 0;
ipaddr = *(uint32_t *)ip;
qos.txtp.traffic_class = ATM_CBR;
qos.txtp.max_pcr = tx_pcr;
qos.txtp.max_sdu = tx_sdu;
qos.rxtp.traffic_class = ATM_CBR;
qos.rxtp.max_pcr = rx_pcr;
qos.rxtp.max_sdu = rx_sdu;
qos.aal = ATM_AAL5;
dprintk("mpoa: mpoa_proc.c: parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n",
qos.txtp.max_pcr,
qos.txtp.max_sdu,
qos.rxtp.max_pcr,
qos.rxtp.max_sdu
);
atm_mpoa_add_qos(ipaddr, &qos);
return 1;
}
static int parse_qos(const char *buff)
{
/*
*/
unsigned char ip[4];
int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
__be32 ipaddr;
struct atm_qos qos;
memset(&qos, 0, sizeof(struct atm_qos));
if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
ip, ip+1, ip+2, ip+3) == 4) {
ipaddr = *(__be32 *)ip;
return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
}
if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
rx_pcr = tx_pcr;
rx_sdu = tx_sdu;
} else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
return 0;
ipaddr = *(__be32 *)ip;
qos.txtp.traffic_class = ATM_CBR;
qos.txtp.max_pcr = tx_pcr;
qos.txtp.max_sdu = tx_sdu;
qos.rxtp.traffic_class = ATM_CBR;
qos.rxtp.max_pcr = rx_pcr;
qos.rxtp.max_sdu = rx_sdu;
qos.aal = ATM_AAL5;
dprintk("parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n",
qos.txtp.max_pcr, qos.txtp.max_sdu,
qos.rxtp.max_pcr, qos.rxtp.max_sdu);
atm_mpoa_add_qos(ipaddr, &qos);
return 1;
}
/*
* Overwrites the old entry or makes a new one.
*/
struct atm_mpoa_qos *atm_mpoa_add_qos(uint32_t dst_ip, struct atm_qos *qos)
{
struct atm_mpoa_qos *entry;
entry = atm_mpoa_search_qos(dst_ip);
if (entry != NULL) {
entry->qos = *qos;
return entry;
}
entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL);
if (entry == NULL) {
printk("mpoa: atm_mpoa_add_qos: out of memory\n");
return entry;
}
entry->ipaddr = dst_ip;
entry->qos = *qos;
entry->next = qos_head;
qos_head = entry;
return entry;
}
static int parse_qos(const char *buff, int len)
{
/* possible lines look like this
* add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
*/
int pos, i;
uint32_t ipaddr;
unsigned char ip[4];
char cmd[4], temp[256];
const char *tmp, *prev;
struct atm_qos qos;
int value[5];
memset(&qos, 0, sizeof(struct atm_qos));
strncpy(cmd, buff, 3);
if( strncmp(cmd,"add", 3) && strncmp(cmd,"del", 3))
return 0; /* not add or del */
pos = 4;
/* next parse ip */
prev = buff + pos;
for (i = 0; i < 3; i++) {
tmp = strchr(prev, '.');
if (tmp == NULL) return 0;
memset(temp, '\0', 256);
memcpy(temp, prev, tmp-prev);
ip[i] = (char)simple_strtoul(temp, NULL, 0);
tmp ++;
prev = tmp;
}
tmp = strchr(prev, ' ');
if (tmp == NULL) return 0;
memset(temp, '\0', 256);
memcpy(temp, prev, tmp-prev);
ip[i] = (char)simple_strtoul(temp, NULL, 0);
ipaddr = *(uint32_t *)ip;
if(!strncmp(cmd, "del", 3))
return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
/* next transmit values */
tmp = strstr(buff, "tx=");
if(tmp == NULL) return 0;
tmp += 3;
prev = tmp;
for( i = 0; i < 1; i++){
tmp = strchr(prev, ',');
if (tmp == NULL) return 0;
memset(temp, '\0', 256);
memcpy(temp, prev, tmp-prev);
value[i] = (int)simple_strtoul(temp, NULL, 0);
tmp ++;
prev = tmp;
}
tmp = strchr(prev, ' ');
if (tmp == NULL) return 0;
memset(temp, '\0', 256);
memcpy(temp, prev, tmp-prev);
value[i] = (int)simple_strtoul(temp, NULL, 0);
qos.txtp.traffic_class = ATM_CBR;
qos.txtp.max_pcr = value[0];
qos.txtp.max_sdu = value[1];
/* next receive values */
tmp = strstr(buff, "rx=");
if(tmp == NULL) return 0;
if (strstr(buff, "rx=tx")) { /* rx == tx */
qos.rxtp.traffic_class = qos.txtp.traffic_class;
qos.rxtp.max_pcr = qos.txtp.max_pcr;
qos.rxtp.max_cdv = qos.txtp.max_cdv;
qos.rxtp.max_sdu = qos.txtp.max_sdu;
} else {
tmp += 3;
prev = tmp;
for( i = 0; i < 1; i++){
tmp = strchr(prev, ',');
if (tmp == NULL) return 0;
memset(temp, '\0', 256);
memcpy(temp, prev, tmp-prev);
value[i] = (int)simple_strtoul(temp, NULL, 0);
tmp ++;
prev = tmp;
}
tmp = strchr(prev, '\0');
if (tmp == NULL) return 0;
memset(temp, '\0', 256);
memcpy(temp, prev, tmp-prev);
value[i] = (int)simple_strtoul(temp, NULL, 0);
qos.rxtp.traffic_class = ATM_CBR;
qos.rxtp.max_pcr = value[0];
qos.rxtp.max_sdu = value[1];
}
qos.aal = ATM_AAL5;
dprintk("mpoa: mpoa_proc.c: parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n",
qos.txtp.max_pcr,
qos.txtp.max_sdu,
qos.rxtp.max_pcr,
qos.rxtp.max_sdu
);
atm_mpoa_add_qos(ipaddr, &qos);
return 1;
}