void DNAT_get_next_rule_internal
(
DNAT_PARM_PTR dparm_ptr /* [IN] */
)
{ /* Body */
NAT_CFG_STRUCT_PTR nat_cfg_ptr = RTCS_getcfg(NAT);
DNAT_ELEMENT_STRUCT_PTR prev_element_ptr, next_element_ptr;
if (nat_cfg_ptr == NULL) {
RTCSCMD_complete(dparm_ptr, RTCSERR_NAT_NOT_INITIALIZED);
return;
}
prev_element_ptr = NULL;
next_element_ptr = (DNAT_ELEMENT_STRUCT_PTR) _queue_head(&nat_cfg_ptr->RULE_QUEUE);
while ((next_element_ptr != NULL) &&
(next_element_ptr->RULE.PRIORITY >= dparm_ptr->RULE.PRIORITY)) {
prev_element_ptr = next_element_ptr;
next_element_ptr = (DNAT_ELEMENT_STRUCT_PTR) _queue_next(&nat_cfg_ptr->RULE_QUEUE, &prev_element_ptr->ELEMENT);
}
if (next_element_ptr == NULL) {
RTCSCMD_complete(dparm_ptr, RTCSERR_NAT_END_OF_RULES);
} else {
dparm_ptr->RULE = next_element_ptr->RULE;
RTCSCMD_complete(dparm_ptr, RTCS_OK);
}
}/* Endbody */
void RTCS_remove_trap_receiver_internal
(
TRAP_PARM *parm
)
{ /* Body */
volatile SNMP_PARSE_PTR snmpcfg = SNMP_get_data();
_ip_address ip_addr = parm->address;
_mqx_uint i;
/* Traverse the receivers list looking for our entry */
for (i = 0; i < SNMPCFG_MAX_TRAP_RECEIVERS; i++) {
if (snmpcfg->trap_receiver_list[i] == ip_addr) {
/* Found it */
snmpcfg->trap_receiver_list[i] = 0;
break;
} /* Endif */
} /* Endfor */
if (i < SNMPCFG_MAX_TRAP_RECEIVERS) {
RTCSCMD_complete(parm, RTCS_OK);
} else {
RTCSCMD_complete(parm, RTCSERR_TRAP_REMOVE_FAILED);
} /* Endif */
} /* Endbody */
void DNAT_delete_rule_internal
(
DNAT_PARM_PTR dparm_ptr /* [IN] */
)
{ /* Body */
NAT_CFG_STRUCT_PTR nat_cfg_ptr = RTCS_getcfg(NAT);
DNAT_ELEMENT_STRUCT_PTR element_ptr;
uint32_t priority = dparm_ptr->RULE.PRIORITY;
if (nat_cfg_ptr == NULL) {
RTCSCMD_complete(dparm_ptr, RTCSERR_NAT_NOT_INITIALIZED);
return;
}
element_ptr = (DNAT_ELEMENT_STRUCT_PTR) _queue_head(&nat_cfg_ptr->RULE_QUEUE);
while (element_ptr != NULL) {
if (element_ptr->RULE.PRIORITY == priority) {
_queue_unlink(&nat_cfg_ptr->RULE_QUEUE, &element_ptr->ELEMENT);
_mem_free((void *)element_ptr);
RTCSCMD_complete(dparm_ptr, RTCS_OK);
return;
}
element_ptr = (DNAT_ELEMENT_STRUCT_PTR) _queue_next(&nat_cfg_ptr->RULE_QUEUE, &element_ptr->ELEMENT);
}
RTCSCMD_complete(dparm_ptr, RTCSERR_NAT_INVALID_RULE);
} /* Endbody */
void RTCS_insert_trap_receiver_internal
(
TRAP_PARM *parm
)
{ /* Body */
volatile SNMP_PARSE_PTR snmpcfg = SNMP_get_data();
_ip_address ip_addr = parm->address;
_mqx_uint i;
/* Find an empty entry in the receivers list */
for (i = 0; i < SNMPCFG_MAX_TRAP_RECEIVERS; i++) {
if (snmpcfg->trap_receiver_list[i] == 0) {
/* Found a space */
snmpcfg->trap_receiver_list[i] = ip_addr;
break;
} /* Endif */
} /* Endfor */
if (i < SNMPCFG_MAX_TRAP_RECEIVERS) {
RTCSCMD_complete(parm, RTCS_OK);
} else {
RTCSCMD_complete(parm, RTCSERR_TRAP_INSERT_FAILED);
} /* Endif */
} /* Endbody */
void NAT_remove_network_internal
(
NAT_PARM_PTR parm_ptr /* [IN] Initialization parameters */
)
{ /* Body */
NAT_CFG_STRUCT_PTR nat_cfg_ptr = RTCS_getcfg(NAT);
uint_32 error;
// Make sure NAT is already up
if (nat_cfg_ptr == NULL) {
error = RTCSERR_NAT_NOT_INITIALIZED;
/*
** Make sure the netmask is valid. We use the fact that
** (x & x+1) == 0 <=> x = 2^n-1.
*/
} else if (~parm_ptr->IP_MASK & (~parm_ptr->IP_MASK + 1)) {
error = RTCSERR_INVALID_PARAMETER;
/* Make sure other parameters have been supplied */
} else if (!parm_ptr->IP_PRV) {
error = RTCSERR_INVALID_PARAMETER;
} else {
// Try to remove the private network
error=NAT_remove_private_network(&nat_cfg_ptr->PRIVATE_NETWORKS, parm_ptr->IP_PRV, parm_ptr->IP_MASK);
}
RTCSCMD_complete(parm_ptr, error);
} /* Endbody */
void NAT_init_internal
(
NAT_PARM_PTR parm_ptr /* [IN] Initialization parameters */
)
{
RTCSCMD_complete(parm_ptr, NAT_init_internal2(parm_ptr));
}
/*FUNCTION*-------------------------------------------------------------
*
* Function Name : ICMP_expire_echo
* Returned Values :
* Comments :
* Called by the Timer. Expire a ICMP echo request.
*
*END*-----------------------------------------------------------------*/
boolean ICMP6_expire_echo(TCPIP_EVENT_PTR event)
{
ICMP_ECHO_PARAM_PTR parms = event->PRIVATE;
RTCSCMD_complete(parms, RTCSERR_ICMP_ECHO_TIMEOUT);
return FALSE;
}
void IPCP_bind
(
TCPIP_PARM_IPCP _PTR_ parms
)
{ /* Body */
IP_IF_PTR if_ptr = parms->handle;
IPCP_CFG_STRUCT_PTR ipcp_ptr = if_ptr->HANDLE;
_ppp_handle handle = ipcp_ptr->HANDLE;
uint_32 error;
ipcp_ptr->CALLUP = IPCP_lowerup;
ipcp_ptr->PARAMUP = &ipcp_ptr->FSM;
ipcp_ptr->CALLDOWN = IPCP_lowerdown;
ipcp_ptr->PARAMDOWN = &ipcp_ptr->FSM;
error = PPP_setcall(handle, PPP_CALL_LINK_UP, &ipcp_ptr->CALLUP, &ipcp_ptr->PARAMUP);
if (!error) {
error = PPP_setcall(handle, PPP_CALL_LINK_DOWN, &ipcp_ptr->CALLDOWN, &ipcp_ptr->PARAMDOWN);
if (error) {
PPP_setcall(handle, PPP_CALL_LINK_UP, &ipcp_ptr->CALLUP, &ipcp_ptr->PARAMUP);
} /* Endif */
} /* Endif */
if (!error) {
ipcp_ptr->IP_UP = parms->data->IP_UP;
ipcp_ptr->IP_DOWN = parms->data->IP_DOWN;
ipcp_ptr->IP_PARAM = parms->data->IP_PARAM;
ipcp_ptr->INIT.ACCEPT_LOCAL_ADDR = parms->data->ACCEPT_LOCAL_ADDR;
ipcp_ptr->INIT.LOCAL_ADDR = parms->data->LOCAL_ADDR;
ipcp_ptr->INIT.ACCEPT_REMOTE_ADDR = parms->data->ACCEPT_REMOTE_ADDR;
ipcp_ptr->INIT.REMOTE_ADDR = parms->data->REMOTE_ADDR;
ipcp_ptr->INIT.DEFAULT_NETMASK = parms->data->DEFAULT_NETMASK;
ipcp_ptr->INIT.NETMASK = parms->data->NETMASK;
ipcp_ptr->INIT.DEFAULT_ROUTE = parms->data->DEFAULT_ROUTE;
ipcp_ptr->INIT.NEG_LOCAL_DNS = parms->data->NEG_LOCAL_DNS;
ipcp_ptr->INIT.ACCEPT_LOCAL_DNS = parms->data->ACCEPT_LOCAL_DNS;
ipcp_ptr->INIT.LOCAL_DNS = parms->data->LOCAL_DNS;
ipcp_ptr->INIT.NEG_REMOTE_DNS = parms->data->NEG_REMOTE_DNS;
ipcp_ptr->INIT.ACCEPT_REMOTE_DNS = parms->data->ACCEPT_REMOTE_DNS;
ipcp_ptr->INIT.REMOTE_DNS = parms->data->REMOTE_DNS;
/* Start IPCP */
PPPFSM_open(&ipcp_ptr->FSM, 0);
/* Open the link */
error = PPP_open(handle, 0);
} /* Endif */
RTCSCMD_complete(parms, PPP_TO_RTCS_ERROR(error));
} /* Endbody */
void BOOTP_open
(
TCPIP_PARM_BOOTP _PTR_ parms
)
{ /* Body */
IP_IF_PTR if_ptr = (IP_IF_PTR)parms->handle;
BOOTP_CFG_PTR bootp = (BOOTP_CFG_PTR) &parms->config;
uint_32 error;
error = BOOT_open(BOOT_service);
if (error) {
RTCSCMD_complete(parms, error);
return;
} /* Endif */
if_ptr->BOOTFN = BOOTP_service;
/* Pick a random transaction ID */
bootp->XID = RTCS_rand();
/* Set initial timeout */
bootp->TIMEOUT = BOOTP_TIMEOUT_MIN;
bootp->SECS = 0;
/* Build a BOOTREQUEST packet */
htonc(bootp->PACKET.OP, BOOTPOP_BOOTREQUEST);
htonc(bootp->PACKET.HTYPE, if_ptr->DEV_TYPE);
htonc(bootp->PACKET.HLEN, if_ptr->DEV_ADDRLEN);
htonc(bootp->PACKET.HOPS, 0);
htonl(bootp->PACKET.XID, bootp->XID);
htons(bootp->PACKET.FLAGS, 0x8000);
htonl(bootp->PACKET.CIADDR, INADDR_ANY);
htonl(bootp->PACKET.YIADDR, INADDR_ANY);
htonl(bootp->PACKET.SIADDR, INADDR_ANY);
htonl(bootp->PACKET.GIADDR, INADDR_ANY);
_mem_zero(bootp->PACKET.CHADDR, sizeof(bootp->PACKET.CHADDR));
_mem_copy(if_ptr->DEV_ADDR, bootp->PACKET.CHADDR, if_ptr->DEV_ADDRLEN);
/* Start the retransmission timer to start sending immediately */
bootp->RESEND.TIME = 0;
bootp->RESEND.EVENT = BOOTP_send;
bootp->RESEND.PRIVATE = if_ptr;
TCPIP_Event_add(&bootp->RESEND);
if_ptr->BOOT = (pointer)parms;
} /* Endbody */
void NAT_close_internal
(
NAT_PARM_PTR parm_ptr /* [IN] Unused */
)
{ /* Body */
NAT_CFG_STRUCT_PTR nat_cfg_ptr = RTCS_getcfg(NAT);
uint_32 error;
if (nat_cfg_ptr == NULL) {
error = RTCSERR_NAT_NOT_INITIALIZED;
} else {
nat_cfg_ptr->NAT_EXEC = NULL;
error = RTCS_OK;
}
RTCSCMD_complete(parm_ptr, error);
} /* Endbody */
void DNAT_add_rule_internal
(
DNAT_PARM_PTR dparm_ptr /* [IN] */
)
{ /* Body */
NAT_CFG_STRUCT_PTR nat_cfg_ptr = RTCS_getcfg(NAT);
DNAT_ELEMENT_STRUCT_PTR new_element_ptr, prev_element_ptr, next_element_ptr;
if (nat_cfg_ptr == NULL) {
RTCSCMD_complete(dparm_ptr, RTCSERR_NAT_NOT_INITIALIZED);
return;
}
if (! NAT_is_private_addr(&nat_cfg_ptr->PRIVATE_NETWORKS,dparm_ptr->RULE.PRIVATE_IP)) {
RTCSCMD_complete(dparm_ptr, RTCSERR_NAT_INVALID_PRIVATE_ADDRESS);
return;
}
if (IP_is_local(NULL, dparm_ptr->RULE.PRIVATE_IP)) {
RTCSCMD_complete(dparm_ptr, RTCSERR_NAT_INVALID_PRIVATE_ADDRESS);
return;
}
prev_element_ptr = NULL;
next_element_ptr = (DNAT_ELEMENT_STRUCT_PTR) _queue_head(&nat_cfg_ptr->RULE_QUEUE);
while ((next_element_ptr != NULL) &&
(next_element_ptr->RULE.PRIORITY > dparm_ptr->RULE.PRIORITY)) {
prev_element_ptr = next_element_ptr;
next_element_ptr = (DNAT_ELEMENT_STRUCT_PTR)
_queue_next(&nat_cfg_ptr->RULE_QUEUE, &prev_element_ptr->ELEMENT);
}
if (next_element_ptr != NULL) {
if (next_element_ptr->RULE.PRIORITY == dparm_ptr->RULE.PRIORITY) {
// A rule of the given priority exist
RTCSCMD_complete(dparm_ptr, RTCSERR_NAT_DUPLICATE_PRIORITY);
return;
}
}
new_element_ptr = (DNAT_ELEMENT_STRUCT_PTR)_mem_alloc_system_zero(sizeof(DNAT_ELEMENT_STRUCT));
if (new_element_ptr == NULL) {
RTCSCMD_complete(dparm_ptr, RTCSERR_OUT_OF_MEMORY);
return;
} /* Endif */
new_element_ptr->RULE = dparm_ptr->RULE;
_queue_insert(&nat_cfg_ptr->RULE_QUEUE, &prev_element_ptr->ELEMENT, &new_element_ptr->ELEMENT);
RTCSCMD_complete(dparm_ptr, RTCS_OK);
}/* Endbody */
void TCP_Close_TCB
(
TCB_STRUCT_PTR tcb, /* IN/OUT - TCP context */
int_32 errnum, /* IN - error code to return */
TCP_CFG_STRUCT_PTR tcp_cfg /* IN/OUT - TCP layer data */
)
{ /* Body */
TCP_PARM_PTR req;
SbufNode _PTR_ buf;
boolean first = TRUE; /* for returning Sends */
boolean not_syn_recv = (tcb->state != SYN_RECEIVED);
/*
** This prevents new packets from being queued on this TCB;
** however there might still be some queued (but only if
** there are no outstanding Receive requests).
*/
tcb->state = CLOSED;
/*
** Cancel timers...
*/
(void)TCP_Timer_stop(&tcb->sndxmittq.t, tcp_cfg->qhead);
(void)TCP_Timer_stop(&tcb->sndacktq.t, tcp_cfg->qhead);
(void)TCP_Timer_stop(&tcb->sndtq.t, tcp_cfg->qhead);
(void)TCP_Timer_stop(&tcb->rcvtq.t, tcp_cfg->qhead);
/*
** Return open request if there is one. This should
** only happen if we are closing on error.
*/
if ( errnum != RTCS_OK && not_syn_recv) {
TCP_Return_open(tcb, errnum, tcp_cfg);
} /* Endif */
/*
** Terminate any Receive requests. We can't receive any more
** packets in the CLOSED state, and presence of any Receives
** means that all data that could be (contiguously) in the
** first Receive is already there (see TCP_Process_data).
**
** In this case the TCB could actually be released, but wait for
** user to close it. Don't have to delete all of the RcvChunks
** or indicate no data left in ring since a TCP_Process_close or
** TCP_Process_receive will do this.
*/
while ( tcb->rcvHead != NULL ) {
TCP_Reply_receive(tcb, tcp_cfg, errnum);
if ( tcb->rcvHead != NULL ) {
TCP_Setup_receive(tcb->rcvHead, tcb, tcp_cfg);
} /* Endif */
} /* Endwhile */
/*
** Terminate any Send requests
*/
buf = tcb->sndbuf;
while ( buf != NULL ) {
tcb->sndbuf = buf->next;
if ( tcb->sndbuf == NULL ) {
tcb->sndbuftail = NULL;
} /* Endif */
req = buf->req;
if ( req != NULL ) {
/* report actual amount sent */
if ( first ) {
req->BUFF_LENG = tcb->snduna - tcb->sndbufseq;
} else {
req->BUFF_LENG = 0;
} /* Endif */
RTCSCMD_complete(req, errnum);
} /* Endif */
first = FALSE;
_mem_free(buf);
buf = tcb->sndbuf;
} /* Endwhile */
/* Terminate any wait request
*/
#if 0
req = tcb->oclient;
if ( req != NULL ) {
req->STATUS = tcb->status;
req->SOFTERROR = tcb->lasterror;
RTCSCMD_complete(req, errnum);
tcb->oclient = NULL;
} /* Endif */
#endif
/*
** Notify socket layer in case some task is blocked on select()
** waiting for data on this socket.
*/
SOCK_select_signal(tcb->SOCKET, tcb->state);
/* Delete send buffers (keep receive buffer in case there is
* pending data)
*/
if ( tcb->sndringbuf != NULL ) {
_mem_free(tcb->sndringbuf);
} /* Endif */
tcb->sndringbuf = NULL;
if ( tcb->sndclk != NULL ) {
_mem_free(tcb->sndclk); /* xmit timestamps buffer */
} /* Endif */
tcb->sndclk = NULL;
} /* Endbody */
// Start CR 2316
static boolean RTCSMIB_request_internal
(
RTCSMIB_WALK_PTR mib
)
{ /* Body */
uchar_ptr inbuffer, nextvar,checkbuffer;
uint_32 inbuf_length, nextlength,check_length;
uint_32 varlen;
boolean ok = FALSE;
uint_32 index =0;
uint_32 errstat =0;
uint_32 error_index;
mib->errstat = SNMP_ERROR_noError;
switch (mib->pdutype) {
case ASN1_TYPE_PDU_GET:
ok = RTCSMIB_get(mib);
break;
case ASN1_TYPE_PDU_GETNEXT:
ok = RTCSMIB_powerful_getnext(mib);
break;
case ASN1_TYPE_PDU_SET:
inbuffer = mib->inbuf;
inbuf_length = mib->inlen;
checkbuffer = inbuffer;
check_length = inbuf_length;
error_index =0;
//check first to ensure all variables in set request are valid
if (check_length >= 5) /* Minmum length for a set operation is 5 */
{
ASN1_READ_TYPELEN_EXPECT(mib, ASN1_TYPE_SEQUENCE, varlen);
nextvar = (uchar_ptr) (mib->inbuf + varlen);
nextlength = check_length - ((uint_32)(nextvar - checkbuffer));
mib->inbuf = checkbuffer;
mib->inlen = check_length;
mib->errstat = SNMP_ERROR_noError;
ok = RTCSMIB_check(mib);
index++;
if(mib->errstat)
{
errstat = mib->errstat;
error_index = index;
}
mib->inbuf = nextvar;
checkbuffer = nextvar;
mib->inlen = nextlength;
check_length = nextlength;
}
if(error_index) //invalid variable in set request,stop set operation to all variables
{
mib->errstat = errstat;
break;
}
mib->inbuf = inbuffer;
mib->inlen = inbuf_length;
//all variables are valid, so set beginning
if (inbuf_length >= 5) /* Minmum length for a set operation is 5 */
{
ASN1_READ_TYPELEN_EXPECT(mib, ASN1_TYPE_SEQUENCE, varlen);
nextvar = (uchar_ptr) (mib->inbuf + varlen);
nextlength = inbuf_length - ((uint_32)(nextvar - inbuffer));
mib->inbuf = inbuffer;
mib->inlen = inbuf_length;
ok = RTCSMIB_set(mib);
mib->inbuf = nextvar;
inbuffer = nextvar;
mib->inlen = nextlength;
inbuf_length = nextlength;
} /* Endwhile */
break;
} /* Endswitch */
if (!ok && !mib->errstat) {
mib->errstat = SNMP_ERROR_PARSE;
} /* Endif */
/* Start CR 2162 */
#ifndef TRAVERSE_MIB_IN_SNMP_TASK
RTCSCMD_complete(mib, RTCS_OK);
#endif
/* End CR 2162 */
return (ok);
} /* Endbody */
void SOCK_select
(
SOCKSELECT_PARM_PTR parms
)
{ /* Body */
uint_32 _PTR_ socket_array;
int i, i2;
uint_32 fds[RTCS_SELECT_MAX_FDS];
int active = FALSE;
// param check
if ((parms->sock_count != 0 && parms->sock_ptr == NULL) || (parms->writesock_count != 0 && parms->writesock_ptr == NULL)) {
RTCSCMD_complete(parms, RTCSERR_INVALID_PARAMETER);
return;
}
// read fds - check every socket in the supplied array
if (parms->sock_count) {
_mem_zero(fds, parms->sock_count * sizeof(uint_32));
for (i = 0, i2 = 0; i < parms->sock_count; i++) {
if (SOCK_select_activity((SOCKET_STRUCT_PTR)parms->sock_ptr[i], 0)) {
fds[i2++] = parms->sock_ptr[i];
}
}
// update socket array - only active sockets
if (i2) {
_mem_zero(parms->sock_ptr, parms->sock_count * sizeof(uint_32));
_mem_copy(fds, parms->sock_ptr, i2 * sizeof(uint_32));
parms->sock_count = i2;
parms->sock = fds[0];
active = TRUE;
}
}
// write fds - check every socket in the supplied array
if (parms->writesock_count) {
_mem_zero(fds, parms->writesock_count * sizeof(uint_32));
for (i = 0, i2 = 0; i < parms->writesock_count; i++) {
if (SOCK_select_activity((SOCKET_STRUCT_PTR)parms->writesock_ptr[i], 1)) {
fds[i2++] = parms->writesock_ptr[i];
}
}
// update socket array - only active sockets
if (i2) {
_mem_zero(parms->writesock_ptr, parms->writesock_count * sizeof(uint_32));
_mem_copy(fds, parms->writesock_ptr, i2 * sizeof(uint_32));
parms->writesock_count = i2;
if (active == FALSE) {
// write fds active but read fds no - set read fds to zero
_mem_zero(parms->sock_ptr, parms->sock_count * sizeof(uint_32));
parms->sock_count = 0;
parms->sock = fds[0];
}
active = TRUE;
}
else if (active == TRUE) {
// read fds active but write fds no - set write fds to zero
_mem_zero(parms->writesock_ptr, parms->writesock_count * sizeof(uint_32));
parms->writesock_count = 0;
}
}
if (active == TRUE) {
// some fds active
RTCSCMD_complete(parms, RTCS_OK);
return;
}
if (parms->timeout == (uint_32)-1) {
parms->sock = 0;
RTCSCMD_complete(parms, RTCS_OK);
return;
} /* Endif */
parms->owner = 0;
SOCK_select_block(parms);
} /* Endbody */
/*FUNCTION*-------------------------------------------------------------
*
* Function Name : ICMP6_send_echo
* Parameters :
*
* _ip_address ipaddress [IN] destination IP address
* uint_32 timeout [IN/OUT] timeout/rtt
* uint_16 id [IN] identification for echo message.
* uint_16 seq not used
*
* Comments :
* Send an ICMP Echo Request packet.
*
*END*-----------------------------------------------------------------*/
void ICMP6_send_echo(ICMP_ECHO_PARAM_PTR parms)
{
#if RTCSCFG_ENABLE_IP6
ICMP6_CFG_STRUCT_PTR ICMP6_cfg_ptr = RTCS_getcfg(ICMP6);
RTCSPCB_PTR pcb;
ICMP6_ECHO_HEADER_PTR packet;
_rtcs_if_handle ihandle_dest = NULL;
uint_32 error;
IF_ICMP6_STATS_ENABLED(ICMP6_cfg_ptr->STATS.COMMON.ST_TX_TOTAL++);
parms->seq = ICMP6_cfg_ptr->ECHO_SEQ++;
pcb = RTCSPCB_alloc_send();
if (pcb == NULL)
{
IF_ICMP6_STATS_ENABLED(ICMP6_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
RTCSCMD_complete(parms, RTCSERR_PCB_ALLOC);
return;
}
if(parms->ping_param->data_buffer && parms->ping_param->data_buffer_size)
{
error = RTCSPCB_append_fragment(pcb, parms->ping_param->data_buffer_size, parms->ping_param->data_buffer);
if (error)
{
IF_ICMP6_STATS_ENABLED(ICMP6_cfg_ptr->STATS.COMMON.ST_TX_ERRORS++);
RTCSLOG_PCB_FREE(pcb, error);
RTCSPCB_free(pcb);
RTCSCMD_complete(parms, error);
return;
}
}
error = RTCSPCB_insert_header(pcb, sizeof(ICMP6_ECHO_HEADER));
if (error)
{
IF_ICMP6_STATS_ENABLED(ICMP6_cfg_ptr->STATS.COMMON.ST_TX_ERRORS++);
IF_ICMP6_STATS_ENABLED(RTCS_seterror(&ICMP6_cfg_ptr->STATS.ERR_TX, error, (uint_32)pcb));
RTCSLOG_PCB_FREE(pcb, error);
RTCSPCB_free(pcb);
RTCSCMD_complete(parms, error);
return;
}
RTCSLOG_PCB_WRITE(pcb, RTCS_LOGCTRL_PROTO(IPPROTO_ICMPV6), 0);
packet = (ICMP6_ECHO_HEADER_PTR)RTCSPCB_DATA(pcb);
pcb->TRANSPORT_LAYER = (uchar_ptr)packet;
htonc(packet->HEAD.TYPE, ICMP6_TYPE_ECHO_REQ);
htonc(packet->HEAD.CODE, 0);
htons(packet->HEAD.CHECKSUM, 0);
htons(packet->ID, parms->ping_param->id);
htons(packet->SEQ, parms->seq);
pcb->IP_SUM = IP_Sum_PCB(RTCSPCB_SIZE(pcb), pcb);
pcb->IP_SUM_PTR = packet->HEAD.CHECKSUM;
if(((sockaddr_in6 *)(&parms->ping_param->addr))->sin6_scope_id)
{
ihandle_dest = ip6_if_get_by_scope_id(((sockaddr_in6 *)(&parms->ping_param->addr))->sin6_scope_id);
}
parms->EXPIRE.TIME = parms->ping_param->timeout;
parms->EXPIRE.EVENT = ICMP6_expire_echo;
parms->EXPIRE.PRIVATE = parms;
parms->start_time = RTCS_time_get(); /* get timestamp */
error = IP6_send(pcb, IPPROTO_ICMPV6|IPTTL(parms->ping_param->hop_limit), NULL/*ipsrc*/, &((sockaddr_in6 *)(&parms->ping_param->addr))->sin6_addr/*ipdest*/, ihandle_dest, 0);
if (error != RTCS_OK)
{
IF_ICMP6_STATS_ENABLED(ICMP6_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
RTCSCMD_complete(parms, error);
return;
}
/*
** If there is no error add the parm struct to config struct
** and initiate the event timer
*/
IF_ICMP6_STATS_ENABLED(ICMP6_cfg_ptr->STATS.ST_TX_ECHO_REQ++);
/* add the prameter structure to ICMP cfg */
parms->NEXT = ICMP6_cfg_ptr->ECHO_PARAM_HEAD;
if (parms->NEXT)
{
parms->NEXT->PREV = &parms->NEXT;
} /* Endif */
ICMP6_cfg_ptr->ECHO_PARAM_HEAD = parms;
parms->PREV = &ICMP6_cfg_ptr->ECHO_PARAM_HEAD;
TCPIP_Event_add(&parms->EXPIRE);
#else
RTCSCMD_complete(parms, RTCSERR_IP_IS_DISABLED);
#endif /* RTCSCFG_ENABLE_IP6 */
}
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 TCP_Process_abort
(
TCP_PARM_PTR req_ptr /* IN/OUT - the open request */
)
{ /* Body */
TCP_CFG_STRUCT_PTR tcp_cfg;
TCB_STRUCT_PTR tcb;
int_32 reply = RTCS_OK;
tcp_cfg = RTCS_getcfg(TCP);
tcb = req_ptr->TCB_PTR;
if ( tcb == NULL ) {
RTCSCMD_complete(req_ptr, RTCSERR_TCP_CONN_RLSD);
return;
}
IF_TCP_STATS_ENABLED(tcp_cfg->STATS.ST_CONN_ABORTS++);
if ( tcb->VALID != TCB_VALID_ID ) {
reply = RTCSERR_TCP_CONN_RLSD;
} else {
switch ( tcb->state ) {
case LISTEN:
/*
** allows for shutdown of listening socket with ABORT option set.
*/
TCP_Close_TCB(tcb, RTCS_OK, tcp_cfg);
TCP_Process_release(tcb, tcp_cfg);
break;
case SYN_RECEIVED:
case ESTABLISHED:
case FINWAIT_1:
case FINWAIT_2:
case CLOSE_WAIT:
TCP_Send_reset(tcb, tcp_cfg); /* send reset packet */
/*FALLTHROUGH*/
case SYN_SENT:
case CLOSING:
case LAST_ACK:
case TIME_WAIT:
TCP_Close_TCB(tcb, RTCSERR_TCP_CONN_ABORTED, tcp_cfg);
/*FALLTHROUGH*/
case BOUND:
case CLOSED:
TCP_Process_release(tcb, tcp_cfg);
break;
default:
reply = RTCSERR_TCP_NOT_CONN;
break;
} /* End Switch */
} /* Endif */
/* The socket will be freed as soon as we return to shutdown() */
if (tcb->VALID == TCB_VALID_ID) {
/* Following code no longer needed, as the option is propagated to the TCB when set */
tcb->SOCKET = 0;
} /* Endif */
RTCSCMD_complete(req_ptr, reply);
} /* Endbody */
void BOOTP_service
(
RTCSPCB_PTR rtcs_pcb /* [IN] BOOTREPLY packet */
)
{ /* Body */
IP_IF_PTR if_ptr = (IP_IF_PTR)rtcs_pcb->IFSRC;
TCPIP_PARM_BOOTP _PTR_ parms = (TCPIP_PARM_BOOTP _PTR_)if_ptr->BOOT;
BOOTP_CFG_PTR bootp = (BOOTP_CFG_PTR) &parms->config;
BOOTP_PACKET_PTR bootreply;
IPIF_PARM parms_bind;
uint_32 error;
uchar_ptr opt;
uchar len, optval, optlen;
/* Make sure the datagram is large enough */
bootreply = (BOOTP_PACKET_PTR)RTCSPCB_DATA(rtcs_pcb);
if (RTCSPCB_SIZE(rtcs_pcb) < sizeof(BOOTP_PACKET)) {
RTCSLOG_PCB_FREE(rtcs_pcb, RTCS_OK);
RTCSPCB_free(rtcs_pcb);
return;
} /* Endif */
/* Make sure the XID matches */
if (ntohl(bootreply->HEAD.XID) != bootp->XID) {
RTCSLOG_PCB_FREE(rtcs_pcb, RTCS_OK);
RTCSPCB_free(rtcs_pcb);
return;
} /* Endif */
RTCSLOG_PCB_READ(rtcs_pcb, RTCS_LOGCTRL_PORT(IPPORT_BOOTPC), 0);
/* OK, assume this reply is for us */
BOOTP_close(if_ptr);
/* Get our IP address, and pick the default netmask */
parms_bind.ihandle = if_ptr;
parms_bind.address = ntohl(bootreply->HEAD.YIADDR);
parms_bind.locmask = 0xFFFFFFFFL;
parms_bind.netmask = IN_DEFAULT_NET(parms_bind.address);
parms_bind.probe = FALSE;
parms->data->SADDR = ntohl(bootreply->HEAD.SIADDR);
#if RTCSCFG_BOOTP_RETURN_YIADDR
parms->data->CLIENTADDR = ntohl(bootreply->HEAD.YIADDR);
#endif
_mem_copy(bootreply->DATA.SNAME, parms->data->SNAME, sizeof(BOOTP_DATA));
RTCSLOG_PCB_FREE(rtcs_pcb, RTCS_OK);
RTCSPCB_free(rtcs_pcb);
/* Parse the vend field for recognized options */
opt = parms->data->OPTIONS;
len = sizeof(parms->data->OPTIONS);
if (ntohl(opt) == BOOTP_MAGIC) {
opt += 4;
len -= 4;
#define BOOTP_NEXTOPT opt += optlen; \
break
while (len) {
/* Get the next option code */
optval = ntohc(opt);
opt++;
len--;
/* Interpret the pad and end options */
if (optval == BOOTPOPT_END) break;
if (optval == BOOTPOPT_PAD) continue;
/* All other codes have a length byte */
if (len == 0) break;
optlen = ntohc(opt);
opt++;
len--;
if (len < optlen) break;
len -= optlen;
switch (optval) {
case BOOTPOPT_MASK:
if (optlen != 4) {BOOTP_NEXTOPT;}
parms_bind.netmask = ntohl(opt);
opt += 4;
break;
default:
BOOTP_NEXTOPT;
} /* Endswitch */
} /* Endwhile */
} /* Endif */
/* Bind the received IP address to this interface */
error = RTCSCMD_internal(parms_bind, IPIF_bind);
/* Done -- unblock the application */
RTCSCMD_complete(parms, error);
} /* Endbody */
void TCP_Process_close
(
TCP_PARM_PTR req_ptr /* IN/OUT - the open request */
)
{ /* Body */
TCP_CFG_STRUCT_PTR tcp_cfg;
TCB_STRUCT_PTR tcb;
int_32 reply = RTCS_OK;
tcp_cfg = RTCS_getcfg(TCP);
tcb = req_ptr->TCB_PTR;
if ( tcb == NULL ) {
RTCSCMD_complete(req_ptr, RTCSERR_TCP_CONN_RLSD);
return;
}
IF_TCP_STATS_ENABLED(tcp_cfg->STATS.ST_CONN_CLOSED++);
if ( tcb->VALID != TCB_VALID_ID ) {
reply = RTCSERR_TCP_CONN_RLSD;
RTCS_log_error( ERROR_TCP,
RTCSERR_TCP_BAD_STATE_FOR_CLOSE,
(uint_32)tcb,
(uint_32)tcb->state,
1 );
} else if ( tcb->state == CLOSED ) {
/* This should be the standard case if the other side aborted. */
TCP_Process_release(tcb, tcp_cfg);
} else if ( (tcb->status & TCPS_FINTOSEND) != 0 ) {
/* Upper layer must have already given us a tcpCLOSE, so we
* can generate an error here. */
reply = RTCSERR_TCP_CONN_CLOSING;
} else {
switch ( tcb->state ) {
case LISTEN:
case SYN_SENT:
TCP_Close_TCB(tcb, RTCS_OK, tcp_cfg);
case BOUND:
TCP_Process_release(tcb, tcp_cfg);
break;
case SYN_RECEIVED:
/* no data has been sent */
case ESTABLISHED:
case CLOSE_WAIT:
TCP_Event(tcb,TCPS_FINTOSEND);
/* We can only effectively close if all data has been sent,
* allowing us to send a FIN immediately; otherwise closing
* is delayed (TCPS_FINTOSEND indicates that connection should
* be closed as soon as all data is sent)
*/
if ( tcb->sndnxt == (tcb->sndbufseq + tcb->sndlen) ) {
TCP_Process_effective_close(tcb, tcp_cfg);
} else {
/*
** Have to kick ourselves into sending the outstanding
** data or we'll sit here forever if the other side is
** just waiting. This would happen if we send w/o PUSH
** just before closing.
*/
TCP_Must_send_ack(tcb, tcp_cfg);
} /* Endif */
break;
default:
/* we shouldn't reach here, but jic... */
RTCS_log_error( ERROR_TCP,
RTCSERR_TCP_BAD_STATE_FOR_CLOSE,
(uint_32)tcb,
(uint_32)tcb->state,
2);
reply = RTCSERR_TCP_NOT_CONN;
break;
} /* End Switch */
} /* Endif */
/* The socket will be freed as soon as we return to shutdown() */
if (tcb->VALID == TCB_VALID_ID) {
tcb->SOCKET = 0;
} /* Endif */
RTCSCMD_complete(req_ptr, reply);
} /* 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 */