uint_32 TFTP_timeout_update
(
TFTP_TO_STRUCT_PTR to
)
{ /* Body */
uint_32 time, time_elapsed;
int_32 error;
time = RTCS_time_get();
if (to->UPDATE) {
time_elapsed = RTCS_timer_get_interval(to->TS, time);
error = time_elapsed - to->M;
to->M += error >> 3;
if (!to->M) to->M++;
if (error < 0) error = -error;
error -= to->D;
to->D += error >> 2;
if (!to->D) to->D++;
to->TO = to->M + (to->D << 2);
} /* Endif */
void NAT_event_tick
(
TCPIP_EVENT_PTR tcpip_event_ptr, /* [IN] Controlling event */
boolean force /* [IN] Force expiry of first event */
)
{ /* Body */
NAT_EVENT_HEAD_PTR nat_event_head_ptr = tcpip_event_ptr->PRIVATE;
uint_32 msec, elapsed;
msec = RTCS_time_get();
if (nat_event_head_ptr->FIRST) {
if (force) {
elapsed = nat_event_head_ptr->FIRST->TIME;
} else {
elapsed = RTCS_timer_get_interval(nat_event_head_ptr->TIMESTAMP, msec);
} /* Endif */
if (nat_event_head_ptr->FIRST->TIME <= elapsed) {
nat_event_head_ptr->FIRST->TIME = 0;
} else {
nat_event_head_ptr->FIRST->TIME -= elapsed;
} /* Endif */
if (nat_event_head_ptr->TIMEDELTA <= elapsed) {
nat_event_head_ptr->TIMEDELTA = 0;
} else {
nat_event_head_ptr->TIMEDELTA -= elapsed;
} /* Endif */
} /* Endif */
nat_event_head_ptr->TIMESTAMP = msec;
} /* Endbody */
void PPP_tx_task
(
void *handle,
/* [IN] - the PPP state structure */
void *creator
/* [IN] - the creation information */
)
{ /* Body */
#if RTCSCFG_ENABLE_IP4
PPP_CFG_PTR ppp_ptr = handle;
uint32_t ctrl;
bool state;
PPP_OPT opt;
PCB_PTR pcb;
uint32_t pcbopt;
PPP_MESSAGE_PTR message, xmithead, * xmitnode;
uint32_t timebefore, timeafter;
bool wait;
int32_t timeout;
uint16_t protocol;
_queue_id queue;
void *param;
/* Obtain a message queue so that PPP_send() can reach us */
queue = RTCS_msgq_open(0, 0);
if (queue == 0) {
RTCS_task_exit(creator, RTCSERR_PPP_OPEN_QUEUE_FAILED);
} /* Endif */
RTCS_task_resume_creator(creator, PPP_OK);
ppp_ptr->MSG_QUEUE = queue;
xmithead = NULL;
timebefore = RTCS_time_get();
#define PPPTX_DISCARD(msg) \
(msg)->PCB->FREE = (msg)->ORIG_FREE; \
PCB_free((msg)->PCB); \
RTCS_msg_free(msg)
for(;;)
{
/**********************************************************
**
** Wait for a packet to send
**
*/
wait = TRUE;
timeout = 0;
/* Check if a packet is waiting for retransmission */
if (xmithead) {
/* Measure elapsed time */
timeafter = RTCS_time_get();
timeout = RTCS_timer_get_interval(timebefore, timeafter);
timebefore = timeafter;
xmithead->DELTA -= timeout;
/* If its timer has expired, send it */
timeout = xmithead->DELTA;
if (timeout <= 0) {
message = NULL;
wait = FALSE;
} /* Endif */
} /* Endif */
/*
** There are three cases at this point:
** 1) Retransmission queue is empty
** (wait == TRUE, timeout == 0, message == ?)
** 2) Retransmission queue is nonempty, positive timeout
** (wait == TRUE, timeout > 0, message == ?)
** 3) Retransmission queue is nonempty, nonpositive timeout,
** i.e., head of retransmission queue timed out
** (wait == FALSE, timeout == 0, message == NULL)
*/
/* If there are no expired messages, block */
if (wait) {
message = RTCS_msgq_receive(queue, timeout, ppp_ptr->MSG_POOL);
} /* Endif */
/*
** There are two cases at this point:
** 1) We got a message from _msgq_receive
** (message != NULL)
** 2) Head of retransmission queue timed out
** (message == NULL)
*/
/* We got a packet to send */
if (message) {
/* Control packets restart or stop retransmission */
ctrl = message->COMMAND;
if (ctrl == PPPCMD_SHUTDOWN) {
param = message->PARAM;
/* Free the message we just got */
RTCS_msg_free(message);
for (xmitnode = &xmithead;;){
if (*xmitnode == NULL) {
break;
} else {
/* unlink */
message = *xmitnode;
*xmitnode = message->NEXT;
/* Free the message from the list */
PPPTX_DISCARD(message);
} /* Endif */
} /* Endfor */
RTCS_msgq_close(queue);
/* Unblock PPP_shutdown() */
RTCS_sem_post(param);
/* Kill self */
return;
} /* Endif */
if (ctrl != PPPCMD_SEND) {
protocol = message->PROTOCOL;
RTCS_msg_free(message);
/*
** Search the retransmission queue for a packet
** matching the protocol field of the control message
*/
for (xmitnode = &xmithead;;
xmitnode = &(*xmitnode)->NEXT) {
if (*xmitnode == NULL) {
break;
} else if ((*xmitnode)->PROTOCOL == protocol) {
message = *xmitnode;
switch (ctrl) {
case PPPCMD_RESTART:
message->TIMEOUT = _PPP_MIN_XMIT_TIMEOUT;
message->RETRY = _PPP_MAX_CONF_RETRIES;
break;
case PPPCMD_STOP:
if (message->NEXT) {
message->NEXT->DELTA += message->DELTA;
} /* Endif */
*xmitnode = message->NEXT;
PPPTX_DISCARD(message);
break;
} /* Endswitch */
break;
} /* Endif */
} /* Endfor */
continue;
} /* Endif */
/* Save the PCB's FREE field */
message->ORIG_FREE = message->PCB->FREE;
if (message->TIMEOUT) {
message->PCB->FREE = PPP_tx_pcbfree;
} /* Endif */
/* Receive timed out -- get the head of the retransmission queue */
} else {
message = xmithead;
xmithead = message->NEXT;
if (xmithead) {
xmithead->DELTA += message->DELTA;
} /* Endif */
/* Generate a TO event */
if (message->CALL) {
message->CALL(message->PARAM, message->PCB, message->RETRY == 1);
} /* Endif */
/* RETRY == 0 means retry forever */
if (message->RETRY) {
/* When the retry count reaches zero, discard the packet */
if (!--message->RETRY) {
PPPTX_DISCARD(message);
continue;
} /* Endif */
} /* Endif */
/* Use exponential backoff when retransmitting */
message->TIMEOUT <<= 1;
if (message->TIMEOUT > _PPP_MAX_XMIT_TIMEOUT) {
message->TIMEOUT = _PPP_MAX_XMIT_TIMEOUT;
} /* Endif */
} /* Endif */
/**********************************************************
**
** We have a packet -- validate it
**
*/
/* Take a snapshot of the current state and send options */
PPP_mutex_lock(&ppp_ptr->MUTEX);
state = ppp_ptr->LINK_STATE;
opt = *ppp_ptr->SEND_OPTIONS;
PPP_mutex_unlock(&ppp_ptr->MUTEX);
/* Send the data packet (unless the link is not open) */
if (!state && message->PROTOCOL != PPP_PROT_LCP) {
PPPTX_DISCARD(message);
ppp_ptr->ST_TX_DISCARDED++;
continue;
} /* Endif */
/**********************************************************
**
** We have a valid packet -- send it
**
*/
/* LCP control packets are always sent with default options */
if (message->PROTOCOL == PPP_PROT_LCP
&& message->PCB->FRAG[0].FRAGMENT[2] >= 1
&& message->PCB->FRAG[0].FRAGMENT[2] <= 7) {
pcbopt = 1;
} else {
pcbopt = 0;
} /* Endif */
pcb = message->PCB;
/* Only data packets are compressed */
/* Start CR 2296 */
//if (((message->PROTOCOL & 0xC000) == 0) && opt.CP) {
/* End CR 2296 */
// pcb = opt.CP->CP_comp(&ppp_ptr->CCP_STATE.SEND_DATA, pcb, ppp_ptr, &opt);
// mqx_htons(pcb->FRAG[0].FRAGMENT, PPP_PROT_CP);
//} /* Endif */
_iopcb_write(ppp_ptr->DEVICE, pcb, pcbopt);
/**********************************************************
**
** Packet is sent -- update retransmission queue
**
*/
/* Free the buffer unless it may need to be retransmitted */
if (message->TIMEOUT) {
/* Measure elapsed time */
timeafter = RTCS_time_get();
timeout = RTCS_timer_get_interval(timebefore, timeafter);
timebefore = timeafter;
if (xmithead) {
xmithead->DELTA -= timeout;
} /* Endif */
/* Insert packet into proper place in retransmission queue */
for (message->DELTA = message->TIMEOUT, xmitnode = &xmithead;;
message->DELTA -= (*xmitnode)->DELTA, xmitnode = &(*xmitnode)->NEXT) {
if (*xmitnode == NULL) {
/* Add packet at tail of queue */
message->NEXT = NULL;
*xmitnode = message;
break;
} else if ((*xmitnode)->DELTA > message->TIMEOUT) {
/* Insert packet in middle (possibly head) of queue */
(*xmitnode)->DELTA -= message->DELTA;
message->NEXT = *xmitnode;
*xmitnode = message;
break;
} /* Endif */
} /* Endfor */
} else {
/* PCB has already been freed by _iopcb_write() */
RTCS_msg_free(message);
} /* Endif */
} /* Endfor */
#endif /* RTCSCFG_ENABLE_IP4 */
} /* Endbody */
void ICMP_service
(
RTCSPCB_PTR pcb, /* [IN/OUT] incoming packet */
void *dummy /* [IN] not used */
)
{ /* Body */
ICMP_CFG_STRUCT_PTR ICMP_cfg_ptr;
ICMP_HEADER_PTR packet;
_ip_address source, dest;
uint32_t error;
uint16_t chksum;
unsigned char type;
#if BSPCFG_ENET_HW_TX_PROTOCOL_CHECKSUM
_ip_address if_addr;
IP_IF_PTR if_ptr;
#endif
ICMP_cfg_ptr = RTCS_getcfg(ICMP);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_TOTAL++);
packet = (ICMP_HEADER_PTR)RTCSPCB_DATA(pcb);
source = IP_source(pcb);
dest = IP_dest(pcb);
type = mqx_ntohc(packet->TYPE);
/*
** Make sure that
** sizeof(ICMP_HEADER) <= RTCSPCB_SIZE(pcb)
*/
if (RTCSPCB_SIZE(pcb) < sizeof(ICMP_HEADER)) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_SMALL_DGRAM++);
RTCSLOG_PCB_FREE(pcb, RTCSERR_ICMP_BAD_HEADER);
RTCSPCB_free(pcb);
return;
} /* Endif */
#if BSPCFG_ENET_HW_RX_PROTOCOL_CHECKSUM
/* HW-offload.*/
if( ((pcb->TYPE & RTCSPCB_TYPE_HW_PROTOCOL_CHECKSUM)==0)
#if RTCSCFG_LINKOPT_8023
||(pcb->LINK_OPTIONS.RX.OPT_8023 == 1)
#endif
)
#endif
{
/* Verify the checksum */
if (IP_Sum_PCB(0, pcb) != 0xFFFF)
{
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_BAD_CHECKSUM++);
RTCSLOG_PCB_FREE(pcb, RTCSERR_ICMP_BAD_CHECKSUM);
RTCSPCB_free(pcb);
return;
}
}
RTCSLOG_PCB_READ(pcb, RTCS_LOGCTRL_PROTO(IPPROTO_ICMP), 0);
switch (type) {
case ICMPTYPE_REDIRECT:
#if RTCSCFG_ENABLE_GATEWAYS
{ /* Scope */
_ip_address origdest, gateway;
ICMP_ERR_HEADER_PTR rdpacket = (ICMP_ERR_HEADER_PTR)packet;
IPIF_PARM parms;
/*
** Make sure that
** sizeof(ICMP_ERR_HEADER) <= RTCSPCB_SIZE(pcb)
*/
if (RTCSPCB_SIZE(pcb) < sizeof(ICMP_ERR_HEADER)) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_SMALL_DGRAM++);
RTCSLOG_PCB_FREE(pcb, RTCSERR_ICMP_BAD_HEADER);
RTCSPCB_free(pcb);
return;
} /* Endif */
gateway = mqx_ntohl(rdpacket->DATA);
origdest = mqx_ntohl(rdpacket->IP.DEST);
/* If we receive a redirect to ourselves, silently discard it.*/
/* Ignore unasigned address.*/
if( IP_is_local(NULL, gateway) || (gateway == INADDR_ANY))
{
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
}
else if(IP_is_gate(source, origdest))
{
parms.address = gateway;
parms.network = origdest;
parms.netmask = 0xFFFFFFFFL;
parms.locmask = 0;
RTCSCMD_internal(parms, IPIF_gate_add_redirect);
}
else
{
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_RD_NOTGATE++);
} /* Endif */
} /* Endscope */
#else
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
#endif
break;
case ICMPTYPE_ECHO_REQ:
/* RFC1122: An ICMP Echo Request destined to an IP broadcast or IP
* multicast address MAY be silently discarded.*/
if((dest == INADDR_BROADCAST) || (IN_MULTICAST(dest) && (ip_if_is_joined(pcb->IFSRC, dest) == false)) )
{
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
}
else
{
error = RTCSPCB_next(pcb, sizeof(ICMP_HEADER));
if (error) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_ERRORS++);
IF_ICMP_STATS_ENABLED(RTCS_seterror(&ICMP_cfg_ptr->STATS.ERR_RX, error, (uint32_t)pcb));
RTCSLOG_PCB_FREE(pcb, error);
RTCSPCB_free(pcb);
return;
} /* Endif */
/*
** RTCSPCB_fork() failing isn't a serious error, so we don't check
** the error code
*/
RTCSPCB_fork(pcb);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_TX_TOTAL++);
RTCSLOG_PCB_WRITE(pcb, RTCS_LOGCTRL_PROTO(IPPROTO_ICMP), 0);
error = RTCSPCB_insert_header(pcb, sizeof(ICMP_HEADER));
if (error) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_ECHO_REQ++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
IF_ICMP_STATS_ENABLED(RTCS_seterror(&ICMP_cfg_ptr->STATS.ERR_TX, error, (uint32_t)pcb));
RTCSLOG_PCB_FREE(pcb, error);
RTCSPCB_free(pcb);
return;
}
/* Change type from Echo to Echo Reply and recalculate checksum */
packet = (ICMP_HEADER_PTR)RTCSPCB_DATA(pcb);
mqx_htonc(packet->TYPE, ICMPTYPE_ECHO_REPLY);
mqx_htonc(packet->CODE, 0);
mqx_htons(packet->CHECKSUM, 0);
pcb->IP_SUM_PTR = NULL;
#if BSPCFG_ENET_HW_TX_PROTOCOL_CHECKSUM
/* HW-offload.*/
if_addr = IP_route_find(source /* Destination*/, 1);
if_ptr = IP_find_if(if_addr);
if( (if_ptr
&& (if_ptr->FEATURES & IP_IF_FEATURE_HW_TX_PROTOCOL_CHECKSUM)
&& (IP_will_fragment(if_ptr, RTCSPCB_SIZE(pcb)) == FALSE))
#if RTCSCFG_LINKOPT_8023
&& (pcb->LINK_OPTIONS.TX.OPT_8023 == 0)
#endif
)
{
pcb->TYPE |= RTCSPCB_TYPE_HW_PROTOCOL_CHECKSUM;
}
else
#endif
{
chksum = IP_Sum_PCB(0, pcb);
chksum = IP_Sum_invert(chksum);
mqx_htons(packet->CHECKSUM, chksum);
pcb->TYPE &= ~RTCSPCB_TYPE_HW_PROTOCOL_CHECKSUM;
}
if(IN_MULTICAST(dest) || IP_addr_is_broadcast(pcb, dest) )
{
dest = IP_get_ipif_addr(pcb->IFSRC);
}
/* Send the Echo Reply whence came the Echo */
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_TX_ECHO_REPLY++);
IP_send(pcb, IPPROTO_ICMP, dest /* Source*/, source /* Destination*/, 0);
pcb = NULL;
}
break;
case ICMPTYPE_ECHO_REPLY:
{ /* Scope */
ICMP_ECHO_HEADER_PTR echopacket = (ICMP_ECHO_HEADER_PTR)packet;
ICMP_ECHO_PARAM_PTR parms;
uint16_t id, seq;
/*
** Make sure that
** sizeof(ICMP_ECHO_HEADER) <= RTCSPCB_SIZE(pcb)
*/
if (RTCSPCB_SIZE(pcb) < sizeof(ICMP_ECHO_HEADER)) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_SMALL_DGRAM++);
RTCSLOG_PCB_FREE(pcb, RTCSERR_ICMP_BAD_HEADER);
RTCSPCB_free(pcb);
return;
} /* Endif */
/*
** get the ID and Sequence number from the packet
*/
id = mqx_ntohs(echopacket->ID);
seq = mqx_ntohs(echopacket->SEQ);
/*
** Find a match for the ID and sequence number
*/
for (parms=ICMP_cfg_ptr->ECHO_PARAM_HEAD; parms; parms=parms->NEXT) {
if ((parms->ping_param->id == id) && (parms->seq == seq)) {
/* received reply for the ping request */
if (parms->NEXT) {
parms->NEXT->PREV = parms->PREV;
}
*parms->PREV = parms->NEXT;
TCPIP_Event_cancel(&parms->EXPIRE);
/* Calculate round trip time */
parms->ping_param->round_trip_time = RTCS_timer_get_interval(parms->start_time, RTCS_time_get());
/* IP address of echo-reply message.*/
{
IP_HEADER_PTR iphead = (IP_HEADER_PTR)RTCSPCB_DATA_NETWORK(pcb);
memset(&parms->ping_param->addr, 0, sizeof(parms->ping_param->addr));
parms->ping_param->addr.sa_family = AF_INET;
((sockaddr_in*)(&parms->ping_param->addr))->sin_addr.s_addr = mqx_ntohl(iphead->SOURCE);
}
RTCSCMD_complete(parms, RTCS_OK);
break;
} /* Endif */
} /* Endfor */
} /* Endscope */
break;
case ICMPTYPE_DESTUNREACH:
case ICMPTYPE_TIMEEXCEED:
{ /* Scope */
IP_HEADER_PTR ip;
ICMP_ERR_HEADER_PTR icmp_err = (ICMP_ERR_HEADER_PTR)packet;
uint32_t len, remain;
bool discard = TRUE;
unsigned char code;
/*
** Check if the attached IP header is IP over IP, and if so, strip IP
** headers until we find one whose source address is not local. Then we
** forward the ICMP error to that IP address
*/
remain = RTCSPCB_SIZE(pcb);
/* Make sure we have at least a full IP header */
if (remain >= sizeof(ICMP_HEADER) + 4 + sizeof(IP_HEADER)) {
ip = (IP_HEADER_PTR)((unsigned char *)packet + sizeof(ICMP_HEADER) + 4);
remain -= sizeof(ICMP_HEADER) + 4;
do {
/* Make sure the IP header is IP over IP */
if (mqx_ntohc(ip->PROTOCOL) != IPPROTO_IPIP) {
break;
} /* Endif */
/* Make sure we have a full IP header + 8 bytes */
len = (mqx_ntohc(ip->VERSLEN) & 0x0F) << 2;
if (remain < len + sizeof(IP_HEADER)) {
break;
} /* Endif */
/* Get next header */
ip = (IP_HEADER_PTR)((unsigned char *)(ip) + len);
remain -= len;
source = mqx_ntohl(ip->SOURCE);
discard = IP_is_local(NULL, source);
} while(discard);
len = (mqx_ntohc(ip->VERSLEN) & 0x0F) << 2;
/*
** discard is true if we are the originator of the IP packet
** in error, or if there was not enough information to find the
** originator. We make sure discard is false, and there is at
** least a full IP header + 8 bytes of data left
*/
if (!discard && (len + 8 <= remain)) {
if (type == ICMPTYPE_DESTUNREACH) {
code = mqx_ntohc(packet->CODE);
switch (code) {
case ICMPCODE_DU_PROTO_UNREACH:
/*
** If we are sending back to the originator, and the
** originator did not use IP over IP, the protocol
** unreachable error is useless.
*/
code = ICMPCODE_DU_NET_UNREACH;
break;
case ICMPCODE_DU_PORT_UNREACH:
/* It doesn't make sense to receive this */
discard = TRUE;
break;
case ICMPCODE_DU_SRCROUTE:
discard = TRUE;
break;
} /* Endswitch */
} else {
/*
** Type is ICMPTYPE_TIMEEXCEED
**
** Problem with routing loops within tunnel. Originator
** does not need to know about tunnel.
*/
type = ICMPTYPE_DESTUNREACH;
code = ICMPCODE_DU_HOST_UNREACH;
} /* Endif */
if (!discard) {
ICMP_send_error_internal(type, code, mqx_ntohl(icmp_err->DATA),
ip, NULL, remain);
} /* Endif */
} /* Endif */
} /* Endif */
} /* Endscope */
break;
} /* End Switch */
#if RTCSCFG_ENABLE_ICMP_STATS
/* Update the statistics */
switch (type) {
case ICMPTYPE_DESTUNREACH: ICMP_cfg_ptr->STATS.ST_RX_DESTUNREACH++; break;
case ICMPTYPE_TIMEEXCEED: ICMP_cfg_ptr->STATS.ST_RX_TIMEEXCEED++; break;
case ICMPTYPE_PARMPROB: ICMP_cfg_ptr->STATS.ST_RX_PARMPROB++; break;
case ICMPTYPE_SRCQUENCH: ICMP_cfg_ptr->STATS.ST_RX_SRCQUENCH++; break;
case ICMPTYPE_REDIRECT: ICMP_cfg_ptr->STATS.ST_RX_REDIRECT++; break;
case ICMPTYPE_ECHO_REQ: ICMP_cfg_ptr->STATS.ST_RX_ECHO_REQ++; break;
case ICMPTYPE_ECHO_REPLY: ICMP_cfg_ptr->STATS.ST_RX_ECHO_REPLY++; break;
case ICMPTYPE_TIME_REQ: ICMP_cfg_ptr->STATS.ST_RX_TIME_REQ++; break;
case ICMPTYPE_TIME_REPLY: ICMP_cfg_ptr->STATS.ST_RX_TIME_REPLY++; break;
case ICMPTYPE_INFO_REQ: ICMP_cfg_ptr->STATS.ST_RX_INFO_REQ++; break;
case ICMPTYPE_INFO_REPLY: ICMP_cfg_ptr->STATS.ST_RX_INFO_REPLY++; break;
default:
ICMP_cfg_ptr->STATS.ST_RX_OTHER++;
ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++;
break;
} /* Endswitch */
#endif
if (pcb) {
RTCSLOG_PCB_FREE(pcb, RTCS_OK);
RTCSPCB_free(pcb);
} /* Endif */
} /* Endbody */
void TCPIP_task
(
void *dummy,
void *creator
)
{ /* Body */
TCPIP_CFG_STRUCT TCPIP_cfg;
RTCS_DATA_PTR RTCS_data_ptr;
uint32_t i;
TCPIP_MESSAGE_PTR tcpip_msg;
uint32_t timeout = 1, timebefore, timeafter, timedelta;
uint32_t status; /* Return status */
_queue_id tcpip_qid;
RTCSLOG_FNE2(RTCSLOG_FN_TCPIP_task, creator);
RTCS_data_ptr = RTCS_get_data();
RTCS_setcfg(TCPIP, &TCPIP_cfg);
TCPIP_cfg.status = RTCS_OK;
tcpip_qid = RTCS_msgq_open(TCPIP_QUEUE, 0);
if (tcpip_qid == 0) {
RTCS_task_exit(creator, RTCSERR_OPEN_QUEUE_FAILED);
} /* Endif */
RTCS_data_ptr->TCPIP_TASKID = RTCS_task_getid();
/*
** Initialize the Time Service
*/
TCP_tick = TCPIP_fake_tick;
TCPIP_Event_init();
timebefore = RTCS_time_get();
/*
** Allocate a block of PCBs
*/
status = RTCSPCB_init();
if (status != RTCS_OK) {
RTCS_task_exit(creator, status);
} /* Endif */
IF_FREE = NULL;
/*
** Initialize the protocols
*/
#if RTCSCFG_ENABLE_IP4
/*********************************************
* Initialize IPv4
**********************************************/
status = IP_init();
if (status)
{
RTCS_task_exit(creator, status);
}
#if RTCSCFG_ENABLE_ICMP
status = ICMP_init();
if (status)
{
RTCS_task_exit(creator, status);
}
#endif /* RTCSCFG_ENABLE_ICMP */
ARP_init();
BOOT_init();
#endif /* RTCSCFG_ENABLE_IP4 */
#if RTCSCFG_ENABLE_IP6
/*********************************************
* Initialize IPv6
**********************************************/
status = IP6_init();
if (status)
{
RTCS_task_exit(creator, status);
}
/* Init ICMP6. */
status = ICMP6_init(); //TBD Add it to RTCS6_protocol_table
if (status)
{
RTCS_task_exit(creator, status);
}
#endif /* RTCSCFG_ENABLE_IP6*/
#if (RTCSCFG_ENABLE_IP_REASSEMBLY && RTCSCFG_ENABLE_IP4) || (RTCSCFG_ENABLE_IP6_REASSEMBLY && RTCSCFG_ENABLE_IP6)
/* Initialize the reassembler */
status = IP_reasm_init();
if (status)
{
RTCS_task_exit(creator, status);
}
#endif
/* Add loopback interface.*/
status = IPLOCAL_init ();
if (status)
{
RTCS_task_exit(creator, status);
};
for (i = 0; RTCS_protocol_table[i]; i++) {
status = (*RTCS_protocol_table[i])();
if (status) {
RTCS_task_exit(creator, status);
} /* Endif */
} /* Endfor */
_RTCS_initialized= TRUE;
RTCS_task_resume_creator(creator, RTCS_OK);
while (1)
{
TCPIP_EVENT_PTR queue = TCPIP_Event_head;
tcpip_msg = (TCPIP_MESSAGE_PTR)RTCS_msgq_receive(tcpip_qid, timeout, RTCS_data_ptr->TCPIP_msg_pool);
if (tcpip_msg)
{
if (NULL != tcpip_msg->COMMAND)
{
tcpip_msg->COMMAND(tcpip_msg->DATA);
}
RTCS_msg_free(tcpip_msg);
}
timeout = TCP_tick();
timeafter = RTCS_time_get();
/* If head changed set time delta to zero to prevent immidiate event */
if (queue == TCPIP_Event_head)
{
timedelta = RTCS_timer_get_interval(timebefore, timeafter);
}
else
{
timedelta = 0;
}
timebefore = timeafter;
timedelta = TCPIP_Event_time(timedelta);
if (timedelta != 0)
{
if ((timedelta < timeout) || (timeout == 0))
{
timeout = timedelta;
}
}
}
} /* Endbody */
void ICMP_service
(
RTCSPCB_PTR pcb, /* [IN/OUT] incoming packet */
pointer dummy /* [IN] not used */
)
{ /* Body */
ICMP_CFG_STRUCT_PTR ICMP_cfg_ptr;
ICMP_HEADER_PTR packet;
_ip_address source, dest;
uint_32 error;
uint_16 chksum;
uchar type;
ICMP_cfg_ptr = RTCS_getcfg(ICMP);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_TOTAL++);
packet = (ICMP_HEADER_PTR)RTCSPCB_DATA(pcb);
source = IP_source(pcb);
dest = IP_dest(pcb);
type = ntohc(packet->TYPE);
/*
** Make sure that
** sizeof(ICMP_HEADER) <= RTCSPCB_SIZE(pcb)
*/
if (RTCSPCB_SIZE(pcb) < sizeof(ICMP_HEADER)) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_SMALL_DGRAM++);
RTCSLOG_PCB_FREE(pcb, RTCSERR_ICMP_BAD_HEADER);
RTCSPCB_free(pcb);
return;
} /* Endif */
/*
** Verify the checksum
*/
if (IP_Sum_PCB(0, pcb) != 0xFFFF) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_BAD_CHECKSUM++);
RTCSLOG_PCB_FREE(pcb, RTCSERR_ICMP_BAD_CHECKSUM);
RTCSPCB_free(pcb);
return;
} /* Endif */
RTCSLOG_PCB_READ(pcb, RTCS_LOGCTRL_PROTO(IPPROTO_ICMP), 0);
switch (type) {
case ICMPTYPE_REDIRECT:
#if RTCSCFG_ENABLE_GATEWAYS
{ /* Scope */
_ip_address origdest, gateway;
ICMP_ERR_HEADER_PTR rdpacket = (ICMP_ERR_HEADER_PTR)packet;
IPIF_PARM parms;
/*
** Make sure that
** sizeof(ICMP_ERR_HEADER) <= RTCSPCB_SIZE(pcb)
*/
if (RTCSPCB_SIZE(pcb) < sizeof(ICMP_ERR_HEADER)) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_SMALL_DGRAM++);
RTCSLOG_PCB_FREE(pcb, RTCSERR_ICMP_BAD_HEADER);
RTCSPCB_free(pcb);
return;
} /* Endif */
gateway = ntohl(rdpacket->DATA);
origdest = ntohl(rdpacket->IP.DEST);
// If we receive a redirect to ourselves, silently discard it
if (IP_is_local(NULL, gateway)) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
// Might want to add a counter here
} else if (IP_is_gate(source, origdest)) {
parms.address = gateway;
parms.network = origdest;
parms.netmask = 0xFFFFFFFFL;
parms.locmask = 0;
RTCSCMD_internal(parms, IPIF_gate_add_redirect);
} else {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_RD_NOTGATE++);
} /* Endif */
} /* Endscope */
#else
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
#endif
break;
case ICMPTYPE_ECHO_REQ:
error = RTCSPCB_next(pcb, sizeof(ICMP_HEADER));
if (error) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_ERRORS++);
IF_ICMP_STATS_ENABLED(RTCS_seterror(&ICMP_cfg_ptr->STATS.ERR_RX, error, (uint_32)pcb));
RTCSLOG_PCB_FREE(pcb, error);
RTCSPCB_free(pcb);
return;
} /* Endif */
/*
** RTCSPCB_fork() failing isn't a serious error, so we don't check
** the error code
*/
RTCSPCB_fork(pcb);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_TX_TOTAL++);
RTCSLOG_PCB_WRITE(pcb, RTCS_LOGCTRL_PROTO(IPPROTO_ICMP), 0);
error = RTCSPCB_insert_header(pcb, sizeof(ICMP_HEADER));
if (error) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_ECHO_REQ++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
IF_ICMP_STATS_ENABLED(RTCS_seterror(&ICMP_cfg_ptr->STATS.ERR_TX, error, (uint_32)pcb));
RTCSLOG_PCB_FREE(pcb, error);
RTCSPCB_free(pcb);
return;
} /* Endif */
/* Change type from Echo to Echo Reply and recalculate checksum */
packet = (ICMP_HEADER_PTR)RTCSPCB_DATA(pcb);
htonc(packet->TYPE, ICMPTYPE_ECHO_REPLY);
htonc(packet->CODE, 0);
htons(packet->CHECKSUM, 0);
chksum = IP_Sum_PCB(0, pcb);
chksum = IP_Sum_invert(chksum);
htons(packet->CHECKSUM, chksum);
pcb->IP_SUM_PTR = NULL;
/* Send the Echo Reply whence came the Echo */
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_TX_ECHO_REPLY++);
IP_send(pcb, IPPROTO_ICMP, dest, source, 0);
pcb = NULL;
break;
case ICMPTYPE_ECHO_REPLY:
{ /* Scope */
ICMP_ECHO_HEADER_PTR echopacket = (ICMP_ECHO_HEADER_PTR)packet;
ICMP_PARM_PTR parms;
uint_16 id, seq;
/*
** Make sure that
** sizeof(ICMP_ECHO_HEADER) <= RTCSPCB_SIZE(pcb)
*/
if (RTCSPCB_SIZE(pcb) < sizeof(ICMP_ECHO_HEADER)) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++);
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.ST_RX_SMALL_DGRAM++);
RTCSLOG_PCB_FREE(pcb, RTCSERR_ICMP_BAD_HEADER);
RTCSPCB_free(pcb);
return;
} /* Endif */
/*
** get the ID and Sequence number from the packet
*/
id = ntohs(echopacket->ID);
seq = ntohs(echopacket->SEQ);
/*
** Find a match for the ID and sequence number
*/
for (parms=ICMP_cfg_ptr->ECHO_PARM_HEAD; parms; parms=parms->NEXT) {
if ((parms->id == id) && (parms->seq == seq)) {
/* received reply for the ping request */
if (parms->NEXT) {
parms->NEXT->PREV = parms->PREV;
} /* Endif */
*parms->PREV = parms->NEXT;
TCPIP_Event_cancel(&parms->EXPIRE);
/* calculate round trip time */
parms->timeout = RTCS_timer_get_interval(parms->timeout, RTCS_time_get());
RTCSCMD_complete(parms, RTCS_OK);
break;
} /* Endif */
} /* Endfor */
} /* Endscope */
break;
case ICMPTYPE_DESTUNREACH:
case ICMPTYPE_TIMEEXCEED:
{ /* Scope */
IP_HEADER_PTR ip;
ICMP_ERR_HEADER_PTR icmp_err = (ICMP_ERR_HEADER_PTR)packet;
uint_32 len, remain;
boolean discard = TRUE;
uchar code;
/*
** Check if the attached IP header is IP over IP, and if so, strip IP
** headers until we find one whose source address is not local. Then we
** forward the ICMP error to that IP address
*/
remain = RTCSPCB_SIZE(pcb);
/* Make sure we have at least a full IP header */
if (remain >= sizeof(ICMP_HEADER) + 4 + sizeof(IP_HEADER)) {
ip = (IP_HEADER_PTR)((uchar_ptr)packet + sizeof(ICMP_HEADER) + 4);
remain -= sizeof(ICMP_HEADER) + 4;
do {
/* Make sure the IP header is IP over IP */
if (ntohc(ip->PROTOCOL) != IPPROTO_IPIP) {
break;
} /* Endif */
/* Make sure we have a full IP header + 8 bytes */
len = (ntohc(ip->VERSLEN) & 0x0F) << 2;
if (remain < len + sizeof(IP_HEADER)) {
break;
} /* Endif */
/* Get next header */
ip = (IP_HEADER_PTR)((uchar_ptr)(ip) + len);
remain -= len;
source = ntohl(ip->SOURCE);
discard = IP_is_local(NULL, source);
} while(discard);
len = (ntohc(ip->VERSLEN) & 0x0F) << 2;
/*
** discard is true if we are the originator of the IP packet
** in error, or if there was not enough information to find the
** originator. We make sure discard is false, and there is at
** least a full IP header + 8 bytes of data left
*/
if (!discard && (len + 8 <= remain)) {
if (type == ICMPTYPE_DESTUNREACH) {
code = ntohc(packet->CODE);
switch (code) {
case ICMPCODE_DU_PROTO_UNREACH:
/*
** If we are sending back to the originator, and the
** originator did not use IP over IP, the protocol
** unreachable error is useless.
*/
code = ICMPCODE_DU_NET_UNREACH;
break;
case ICMPCODE_DU_PORT_UNREACH:
/* It doesn't make sense to receive this */
discard = TRUE;
break;
case ICMPCODE_DU_SRCROUTE:
discard = TRUE;
break;
} /* Endswitch */
} else {
/*
** Type is ICMPTYPE_TIMEEXCEED
**
** Problem with routing loops within tunnel. Originator
** does not need to know about tunnel.
*/
type = ICMPTYPE_DESTUNREACH;
code = ICMPCODE_DU_HOST_UNREACH;
} /* Endif */
if (!discard) {
ICMP_send_error_internal(type, code, ntohl(icmp_err->DATA),
ip, NULL, remain);
} /* Endif */
} /* Endif */
} /* Endif */
} /* Endscope */
break;
} /* End Switch */
#if RTCSCFG_ENABLE_ICMP_STATS
/* Update the statistics */
switch (type) {
case ICMPTYPE_DESTUNREACH: ICMP_cfg_ptr->STATS.ST_RX_DESTUNREACH++; break;
case ICMPTYPE_TIMEEXCEED: ICMP_cfg_ptr->STATS.ST_RX_TIMEEXCEED++; break;
case ICMPTYPE_PARMPROB: ICMP_cfg_ptr->STATS.ST_RX_PARMPROB++; break;
case ICMPTYPE_SRCQUENCH: ICMP_cfg_ptr->STATS.ST_RX_SRCQUENCH++; break;
case ICMPTYPE_REDIRECT: ICMP_cfg_ptr->STATS.ST_RX_REDIRECT++; break;
case ICMPTYPE_ECHO_REQ: ICMP_cfg_ptr->STATS.ST_RX_ECHO_REQ++; break;
case ICMPTYPE_ECHO_REPLY: ICMP_cfg_ptr->STATS.ST_RX_ECHO_REPLY++; break;
case ICMPTYPE_TIME_REQ: ICMP_cfg_ptr->STATS.ST_RX_TIME_REQ++; break;
case ICMPTYPE_TIME_REPLY: ICMP_cfg_ptr->STATS.ST_RX_TIME_REPLY++; break;
case ICMPTYPE_INFO_REQ: ICMP_cfg_ptr->STATS.ST_RX_INFO_REQ++; break;
case ICMPTYPE_INFO_REPLY: ICMP_cfg_ptr->STATS.ST_RX_INFO_REPLY++; break;
default:
ICMP_cfg_ptr->STATS.ST_RX_OTHER++;
ICMP_cfg_ptr->STATS.COMMON.ST_RX_DISCARDED++;
break;
} /* Endswitch */
#endif
if (pcb) {
RTCSLOG_PCB_FREE(pcb, RTCS_OK);
RTCSPCB_free(pcb);
} /* Endif */
} /* Endbody */
