bool DHCP_option_addrlist
(
unsigned char * *optptr,
uint32_t *optlen,
unsigned char opttype,
_ip_address *addrptr,
uint32_t addrcount
)
{ /* Body */
unsigned char *opt = *optptr;
_ip_address addr;
if ((*optlen) < 4*addrcount+2) return FALSE;
mqx_htonc(opt, opttype);
opt++;
mqx_htonc(opt, 4*addrcount);
opt++;
while (addrcount--) {
addr = *addrptr++;
mqx_htonl(opt, addr);
opt += 4;
} /* Endwhile */
*optlen -= 4*addrcount+2;
*optptr = opt;
return TRUE;
} /* Endbody */
bool DHCP_option_string
(
unsigned char * *optptr,
uint32_t *optlen,
unsigned char opttype,
char *optval
)
{ /* Body */
uint32_t slen = 0;
unsigned char *opt;
opt = (unsigned char *)optval;
while (*opt++) slen++;
if ((*optlen) < slen+2) return FALSE;
opt = *optptr;
mqx_htonc(opt, opttype);
opt++;
mqx_htonc(opt, slen);
opt++;
_mem_copy(optval, opt, slen);
opt += slen;
*optlen -= slen+2;
*optptr = opt;
return TRUE;
} /* Endbody */
bool DHCP_option_variable
(
unsigned char * *optptr,
uint32_t *optlen,
unsigned char opttype,
unsigned char *options,
uint32_t num_options
)
{ /* Body */
uint32_t i;
unsigned char *opt = *optptr;
if ((*optlen) < (num_options + 2)) return FALSE;
mqx_htonc(opt, opttype);
opt++;
mqx_htonc(opt, (unsigned char)num_options);
opt++;
for ( i = 0; i < num_options; i++ ) {
mqx_htonc(opt, options[i]);
opt++;
} /* Endfor */
*optlen -= (num_options + 2);
*optptr = opt;
return TRUE;
} /* Endbody */
static void RIP_build_header(
unsigned char *buf, /* [OUT] the rip header */
uint8_t cmd, /* [IN] the commande */
uint8_t version /* [IN] the version */
)
{ /* Body */
RIP_HEADER_PTR hd = (RIP_HEADER_PTR)buf;
_mem_zero(buf, sizeof(RIP_HEADER));
mqx_htonc(hd->COMMAND, cmd);
mqx_htonc(hd->VERSION, version);
mqx_htons(hd->MBZ, 0);
} /* Endbody */
void BOOTP_open
(
TCPIP_PARM_BOOTP *parms
)
{ /* Body */
IP_IF_PTR if_ptr = (IP_IF_PTR)parms->handle;
BOOTP_CFG_PTR bootp = (BOOTP_CFG_PTR) &parms->config;
uint32_t 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 */
mqx_htonc(bootp->PACKET.OP, BOOTPOP_BOOTREQUEST);
mqx_htonc(bootp->PACKET.HTYPE, if_ptr->DEV_TYPE);
mqx_htonc(bootp->PACKET.HLEN, if_ptr->DEV_ADDRLEN);
mqx_htonc(bootp->PACKET.HOPS, 0);
mqx_htonl(bootp->PACKET.XID, bootp->XID);
mqx_htons(bootp->PACKET.FLAGS, 0x8000);
mqx_htonl(bootp->PACKET.CIADDR, INADDR_ANY);
mqx_htonl(bootp->PACKET.YIADDR, INADDR_ANY);
mqx_htonl(bootp->PACKET.SIADDR, INADDR_ANY);
mqx_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 = (void *)parms;
} /* Endbody */
bool DHCP_option_int8
(
unsigned char * *optptr,
uint32_t *optlen,
unsigned char opttype,
unsigned char optval
)
{ /* Body */
unsigned char *opt = *optptr;
if ((*optlen) < 3) return FALSE;
mqx_htonc(opt, opttype);
opt++;
mqx_htonc(opt, 1);
opt++;
mqx_htonc(opt, optval);
opt++;
*optlen -= 3;
*optptr = opt;
return TRUE;
} /* Endbody */
bool DHCP_option_addr
(
unsigned char * *optptr,
uint32_t *optlen,
unsigned char opttype,
_ip_address addr
)
{ /* Body */
unsigned char *opt = *optptr;
if ((*optlen) < 6) return FALSE;
mqx_htonc(opt, opttype);
opt++;
mqx_htonc(opt, 4);
opt++;
mqx_htonl(opt, addr);
opt += 4;
*optlen -= 6;
*optptr = opt;
return TRUE;
} /* Endbody */
bool DHCP_option_int16
(
unsigned char * *optptr,
uint32_t *optlen,
unsigned char opttype,
uint16_t optval
)
{ /* Body */
unsigned char *opt = *optptr;
if ((*optlen) < 4) return FALSE;
mqx_htonc(opt, opttype);
opt++;
mqx_htonc(opt, 2);
opt++;
mqx_htons(opt, optval);
opt += 2;
*optlen -= 4;
*optptr = opt;
return TRUE;
} /* Endbody */
static uint32_t DNS_append_local_name
(
unsigned char *qname_buffer,
uint32_t total_length
)
{ /* Body */
uint32_t local_name_length = 0;
uint32_t error;
unsigned char *label_length_ptr;
unsigned char label_length = 0;
if ( DNS_Local_network_name[local_name_length] == '\0' ) {
return( RTCSERR_DNS_INVALID_LOCAL_NAME );
}/* Endif */
/* If the Local Network is the ROOT Domain Name */
if ( ( DNS_Local_network_name[local_name_length] == '.' )
&& ( DNS_Local_network_name[local_name_length + 1] == '\0' )) {
mqx_htonc((qname_buffer + total_length), '\0');
return( DNS_OK );
}/* Endif */
label_length_ptr = qname_buffer + total_length;
error = DNS_OK;
while ( DNS_Local_network_name[local_name_length] ) {
/*
** RFC 1035 says labels must start with a letter, but in practice
** some aren't
*/
if ( isalnum(DNS_Local_network_name[local_name_length]) ) {
mqx_htonc((qname_buffer + total_length + 1),
DNS_Local_network_name[local_name_length]);
total_length++;
local_name_length++;
label_length++;
} else {
error = RTCSERR_DNS_INVALID_LOCAL_NAME;
break;
} /* Endif */
while ( ( DNS_Local_network_name[local_name_length] != '.' ) &&
( DNS_Local_network_name[local_name_length] != '\0' ) ) {
/* Domain Name characters can only be letters, hyphens, or numbers */
if ( (isalnum(DNS_Local_network_name[local_name_length]) ||
DNS_Local_network_name[local_name_length] == '-' ) &&
total_length < DNS_MAX_CHARS_IN_NAME &&
label_length <= DNS_MAX_LABEL_LENGTH ) {
mqx_htonc((qname_buffer + total_length + 1),
DNS_Local_network_name[local_name_length]);
total_length++;
local_name_length++;
label_length++;
} else {
error = RTCSERR_DNS_INVALID_LOCAL_NAME;
break;
} /* Endif */
} /* Endwhile */
if ( error == RTCSERR_DNS_INVALID_LOCAL_NAME ) {
break;
}/* Endif */
mqx_htonc(label_length_ptr, label_length);
label_length = 0;
total_length++;
label_length_ptr = qname_buffer + total_length;
local_name_length++;
} /* Endwhile */
if ( error == DNS_OK ) {
/*
** Need to append '\0' to terminate domain name properly.
** This signifies the ROOT domain
*/
mqx_htonc(label_length_ptr, '\0');
}/* Endif */
return( error );
} /* Endbody */
bool IGMP_send_report
(
ip_mreq *igrp,
uint16_t type
)
{ /* Body */
IGMP_CFG_STRUCT_PTR IGMP_cfg_ptr = RTCS_getcfg(IGMP);
uint32_t error;
uint16_t checksum;
RTCSPCB_PTR pcb;
IGMP_HEADER_PTR header;
IP_IF_PTR ipif;
_ip_address ipdst;
IF_IGMP_STATS_ENABLED(IGMP_cfg_ptr->STATS.COMMON.ST_TX_TOTAL++);
/* never send a report for the local groups */
if (IN_LOCAL_MULTICAST(igrp->imr_multiaddr.s_addr)) {
return TRUE;
} /* Endif */
/* get the interface with its ip address */
ipif = IP_find_if(igrp->imr_interface.s_addr);
if (ipif == NULL) {
IF_IGMP_STATS_ENABLED(IGMP_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
return FALSE;
} /* Endif */
pcb = RTCSPCB_alloc_send();
if (pcb == NULL) {
IF_IGMP_STATS_ENABLED(IGMP_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
return FALSE;
} /* Endif */
//RTCSLOG_PCB_ALLOC(pcb);
error = RTCSPCB_insert_header(pcb, sizeof(IGMP_HEADER));
if (error) {
RTCSLOG_PCB_FREE(pcb, error);
RTCSPCB_free(pcb);
IF_IGMP_STATS_ENABLED(IGMP_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
return FALSE;
} /* Endif */
RTCSLOG_PCB_WRITE(pcb, RTCS_LOGCTRL_PROTO(IPPROTO_IGMP), 1);
#ifdef IGMP_V2
/* check if routers igmpv1 are present or not */
if (type == IGMPTYPE_V2_REPORT && ipif->IGMP_V1_ROUTER_FLAG) {
uint32_t curTime = RTCS_time_get();
/* WORK: handle the overflow (see tcp seq) */
if (curTime < ipif->IGMP_V1_ROUTER_TIMEOUT) {
type = IGMPTYPE_V1_REPORT;
} else {
/* if the timeout expired, clear the flag */
ipif->IGMP_V1_ROUTER_FLAG = 0;
} /* Endif */
} /* Endif */
#endif /* IGMP_V2 */
/* build the igmp packet */
header = (IGMP_HEADER_PTR)RTCSPCB_DATA(pcb);
mqx_htonc(header->TYPE, type);
mqx_htonc(header->MAX_RESP_TIME, 0);
mqx_htons(header->CHECKSUM, 0);
mqx_htonl(header->GROUP_ADDRESS, igrp->imr_multiaddr.s_addr);
checksum = _mem_sum_ip(0, sizeof(IGMP_HEADER), header);
checksum = IP_Sum_invert(checksum);
mqx_htons(header->CHECKSUM, checksum);
/* WORK: for IGMP_V2, add a router alert option but currently ip layer doesnt support ip options */
/* send the igmp packet */
ipdst = igrp->imr_multiaddr.s_addr;
#ifdef IGMP_V2
if (type == IGMPTYPE_LEAVE) {
ipdst = INADDR_ALLROUTERS_GROUP;
} /* Endif */
#endif
IF_IGMP_STATS_ENABLED(IGMP_cfg_ptr->STATS.ST_TX_REPORT++); /* WORK: not always true for IGMP_V2 */
error = IP_send(pcb, IPPROTO_IGMP | IPTTL(1), igrp->imr_interface.s_addr, ipdst, RTCS_MSG_NOLOOP);
return TRUE;
} /* Endbody */
uint32_t ENET_send
(
/* [IN] the Ethernet state structure */
_enet_handle handle,
/* [IN] the packet to send */
PCB_PTR packet,
/* [IN] the protocol */
uint16_t type,
/* [IN] the destination Ethernet address */
_enet_address dest,
/* [IN] optional flags, zero = default */
uint32_t flags
)
{
ENET_CONTEXT_STRUCT_PTR enet_ptr = (ENET_CONTEXT_STRUCT_PTR)handle;
ENET_HEADER_PTR packet_ptr;
unsigned char *type_ptr;
PCB_FRAGMENT_PTR frag_ptr;
uint32_t swhdr, size, frags;
uint32_t error;
_KLOGM(KERNEL_DATA_STRUCT_PTR kernel_data);
_KLOGM(_GET_KERNEL_DATA(kernel_data));
_KLOGE6(KLOG_ENET_send, handle, packet, type, dest, flags);
if (flags & ENET_OPT_8021QTAG) {
swhdr = ENET_FRAMESIZE_HEAD_VLAN;
} else {
swhdr = ENET_FRAMESIZE_HEAD;
}
/*
** Make sure the first fragment is long enough for the Ethernet
** frame header. This isn't strictly necessary, but it's impractical
** to split a 14-26 byte header over multiple fragments.
*/
#if MQX_CHECK_ERRORS
if (packet->FRAG[0].LENGTH < swhdr) {
ENET_INC_STATS(COMMON.ST_TX_DISCARDED);
error = ENETERR_SEND_SHORT;
goto ERROR;
}
#endif
/*
** Make sure that no fragment exceeds a maximum packet length.
** We check every fragment because we want to prevent something
** like FRAG[0].LENGTH = 2000, FRAG[1].LENGTH = -1000. This
** situation would not be detected if we only check the total
** length.
*/
size = frags = 0;
for (frag_ptr = packet->FRAG; frag_ptr->LENGTH; frag_ptr++) {
#if MQX_CHECK_ERRORS
if (frag_ptr->LENGTH > enet_ptr->MaxTxFrameSize) {
ENET_INC_STATS(COMMON.ST_TX_DISCARDED);
error = ENETERR_SEND_LONG;
goto ERROR;
}
#endif
size += frag_ptr->LENGTH;
frags++;
}
/*
** Make sure that the total sum of the fragments doesn't exceed
** a maximum packet length.
*/
#if MQX_CHECK_ERRORS
if (size > enet_ptr->MaxTxFrameSize) {
ENET_INC_STATS(COMMON.ST_TX_DISCARDED);
error = ENETERR_SEND_LONG;
goto ERROR;
}
#endif
/*
** Everything checks out -- fill in the header.
*/
packet_ptr = (ENET_HEADER_PTR)packet->FRAG[0].FRAGMENT;
htone(packet_ptr->DEST, dest);
htone(packet_ptr->SOURCE, enet_ptr->ADDRESS);
type_ptr = packet_ptr->TYPE;
if (flags & ENET_OPT_8021QTAG) {
ENET_8021QTAG_HEADER_PTR tag_ptr = (ENET_8021QTAG_HEADER_PTR)(type_ptr+2);
uint16_t tag;
tag = ENET_GETOPT_8021QPRIO(flags) << 13;
mqx_htons(type_ptr, ENETPROT_8021Q);
mqx_htons(tag_ptr->TAG, tag);
type_ptr = tag_ptr->TYPE;
}
if (flags & ENET_OPT_8023) {
ENET_8022_HEADER_PTR llc_ptr = (ENET_8022_HEADER_PTR)(type_ptr+2);
(void)mqx_htons(type_ptr, size - swhdr);
mqx_htonc(llc_ptr->DSAP, 0xAA);
mqx_htonc(llc_ptr->SSAP, 0xAA);
mqx_htonc(llc_ptr->COMMAND, 0x03);
mqx_htonc(&llc_ptr->OUI[0], 0x00);
mqx_htonc(&llc_ptr->OUI[1], 0x00);
mqx_htonc(&llc_ptr->OUI[2], 0x00);
type_ptr = llc_ptr->TYPE;
}
mqx_htons(type_ptr, type);
/*
** This function can be called from any context, and it needs mutual
** exclusion with itself, and with ENET_ISR().
*/
ENET_lock_context(enet_ptr);
error = (*enet_ptr->PARAM_PTR->ENET_IF->MAC_IF->SEND)(handle, packet, size, frags, flags);
ENET_unlock_context(enet_ptr);
if (error) {
ERROR:
PCB_free(packet);
}
_KLOGX4(KLOG_ENET_send, handle, packet, error);
return error;
}
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 ICMP_send_error_internal
(
uint8_t type, /* [IN] the type to send */
uint8_t code, /* [IN] the code to send */
uint32_t param, /* [IN] a parameter */
IP_HEADER_PTR iph, /* [IN] the IP header */
RTCSPCB_PTR origpcb, /* [IN] pcb with bad packet */
uint32_t maxlen /* [IN] the max data len to send, 0 = default */
)
{ /* Body */
ICMP_CFG_STRUCT_PTR ICMP_cfg_ptr = RTCS_getcfg(ICMP);
RTCSPCB_PTR pcb;
ICMP_ERR_HEADER_PTR icmph;
_ip_address ipsrc = mqx_ntohl(iph->SOURCE);
_ip_address ipdst = mqx_ntohl(iph->DEST);
uint16_t iphdrlen = (mqx_ntohc(iph->VERSLEN) & 0x0F) << 2;
uint16_t ippktlen = mqx_ntohs(iph->LENGTH) - iphdrlen;
uint16_t checksum;
_ip_address icmpsrc = IP_is_local(NULL,ipdst) ? ipdst : INADDR_ANY;
uint32_t error;
unsigned char *buffer;
uint32_t temp;
#if RTCSCFG_ENABLE_NAT
TCP_HEADER_PTR tcp_hdr;
UDP_HEADER_PTR udp_hdr;
IP_HEADER_PTR ip_hdr;
uint32_t protocol;
uint16_t src_port, dest_port;
uint32_t (_CODE_PTR_ *nat_exec)(RTCSPCB_PTR *);
#endif
#if BSPCFG_ENET_HW_TX_PROTOCOL_CHECKSUM
_ip_address if_addr;
IP_IF_PTR if_ptr;
#endif
/*
** Only include up to a maximum of maxlen bytes of data from the
** original IP datagram
*/
if (!maxlen) {
maxlen = IP_DEFAULT_MTU - sizeof(IP_HEADER) - sizeof(ICMP_HEADER) - 4;
} /* Endif */
if (origpcb) {
temp = RTCSPCB_DATA(origpcb) - RTCSPCB_DATA_NETWORK(origpcb);
if (maxlen > origpcb->HEADER_FRAG_USED + temp) {
maxlen = origpcb->HEADER_FRAG_USED + temp;
} /* Endif */
} /* Endif */
if (ippktlen + iphdrlen > maxlen) {
ippktlen = maxlen - iphdrlen;
} /* Endif */
/* Don't send an error in response to an ICMP error */
if (mqx_ntohc(iph->PROTOCOL) == IPPROTO_ICMP) {
/* Make sure the packet has at least a 'TYPE' field */
if (ippktlen == 0) {
return;
} /* Endif */
icmph = (ICMP_ERR_HEADER_PTR)((unsigned char *)iph + iphdrlen);
if (!ICMPTYPE_ISQUERY(mqx_ntohc(icmph->HEAD.TYPE))) {
return;
} /* Endif */
} /* Endif */
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_TX_TOTAL++);
/* Allocate a PCB */
pcb = RTCSPCB_alloc_send();
if (pcb == NULL) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
return;
} /* Endif */
//RTCSLOG_PCB_ALLOC(pcb);
if (origpcb) {
/* Add a dependency and a pointer to the ICMP data */
RTCSPCB_depend(pcb, origpcb);
error = RTCSPCB_append_fragment(pcb, iphdrlen + ippktlen, (unsigned char *)iph);
} else {
/* Reserve space for the ICMP data */
buffer = RTCS_mem_alloc_system(iphdrlen + ippktlen);
if (!buffer) {
IF_ICMP_STATS_ENABLED(ICMP_cfg_ptr->STATS.COMMON.ST_TX_MISSED++);
IF_ICMP_STATS_ENABLED(RTCS_seterror(&ICMP_cfg_ptr->STATS.ERR_TX, RTCSERR_OUT_OF_MEMORY, (uint32_t)pcb));
RTCSLOG_PCB_FREE(pcb, RTCSERR_OUT_OF_MEMORY);
RTCSPCB_free(pcb);
return;
} /* Endif */
_mem_set_type(buffer, MEM_TYPE_ICMP_DATA);
_mem_copy(iph, buffer, iphdrlen + ippktlen);
error = RTCSPCB_append_fragment_autofree(pcb, iphdrlen + ippktlen, buffer);
if (error) {
_mem_free(buffer);
} /* Endif */
} /* Endif */
if (!error) {
error = RTCSPCB_insert_header(pcb, sizeof(ICMP_HEADER) + 4);
} /* Endif */
if (error) {
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;
} /* Endif */
RTCSLOG_PCB_WRITE(pcb, RTCS_LOGCTRL_PROTO(IPPROTO_ICMP), 0);
/* Build the header */
icmph = (ICMP_ERR_HEADER_PTR)RTCSPCB_DATA(pcb);
mqx_htonc(icmph->HEAD.TYPE, type);
mqx_htonc(icmph->HEAD.CODE, code);
mqx_htons(icmph->HEAD.CHECKSUM, 0);
mqx_htonl(icmph->DATA, param);
#if BSPCFG_ENET_HW_TX_PROTOCOL_CHECKSUM
/* HW-offload.*/
if_addr = IP_route_find(ipsrc /* 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
{
checksum = IP_Sum_PCB (0, pcb);
checksum = IP_Sum_invert(checksum);
mqx_htons(icmph->HEAD.CHECKSUM, checksum);
pcb->TYPE &= ~RTCSPCB_TYPE_HW_PROTOCOL_CHECKSUM;
}
#if RTCSCFG_ENABLE_ICMP_STATS
/* Update the statistics */
switch (type) {
case ICMPTYPE_DESTUNREACH: ICMP_cfg_ptr->STATS.ST_TX_DESTUNREACH++; break;
case ICMPTYPE_TIMEEXCEED: ICMP_cfg_ptr->STATS.ST_TX_TIMEEXCEED++; break;
case ICMPTYPE_PARMPROB: ICMP_cfg_ptr->STATS.ST_TX_PARMPROB++; break;
case ICMPTYPE_SRCQUENCH: ICMP_cfg_ptr->STATS.ST_TX_SRCQUENCH++; break;
case ICMPTYPE_REDIRECT: ICMP_cfg_ptr->STATS.ST_TX_REDIRECT++; break;
case ICMPTYPE_ECHO_REQ: ICMP_cfg_ptr->STATS.ST_TX_ECHO_REQ++; break;
case ICMPTYPE_ECHO_REPLY: ICMP_cfg_ptr->STATS.ST_TX_ECHO_REPLY++; break;
case ICMPTYPE_TIME_REQ: ICMP_cfg_ptr->STATS.ST_TX_TIME_REQ++; break;
case ICMPTYPE_TIME_REPLY: ICMP_cfg_ptr->STATS.ST_TX_TIME_REPLY++; break;
case ICMPTYPE_INFO_REQ: ICMP_cfg_ptr->STATS.ST_TX_INFO_REQ++; break;
case ICMPTYPE_INFO_REPLY: ICMP_cfg_ptr->STATS.ST_TX_INFO_REPLY++; break;
default: ICMP_cfg_ptr->STATS.ST_TX_OTHER++; break;
} /* Endswitch */
#endif
#if RTCSCFG_ENABLE_NAT
/* Reverse NAT (if it is installed) on the origpcb,
otherwise the icmp error will not get sent to the
original src */
nat_exec = RTCS_getcfg(NAT);
if (origpcb && nat_exec && *nat_exec) {
// swap src and dst IPs and ports so NAT_apply
// will process the pcb
ip_hdr = (IP_HEADER_PTR)RTCSPCB_DATA(origpcb);
protocol = mqx_ntohc(ip_hdr->PROTOCOL);
// Swap ports if it is udp or tcp
if ((protocol == IPPROTO_TCP) || (protocol == IPPROTO_UDP)) {
switch(protocol)
{
case IPPROTO_TCP:
tcp_hdr = (TCP_HEADER_PTR)((unsigned char *)ip_hdr + IPH_LEN(ip_hdr));
dest_port = mqx_ntohs(tcp_hdr->dest_port);
src_port = mqx_ntohs(tcp_hdr->source_port);
mqx_htons(tcp_hdr->dest_port, src_port);
mqx_htons(tcp_hdr->source_port, dest_port);
break;
case IPPROTO_UDP:
udp_hdr = (UDP_HEADER_PTR)((unsigned char *)ip_hdr + IPH_LEN(ip_hdr));
dest_port = mqx_ntohs(udp_hdr->DEST_PORT);
src_port = mqx_ntohs(udp_hdr->SRC_PORT);
mqx_htons(udp_hdr->DEST_PORT, src_port);
mqx_htons(udp_hdr->SRC_PORT, dest_port);
break;
default:
// should not get here
break;
}
}
// swap IPs
ipsrc = mqx_ntohl(ip_hdr->SOURCE);
ipdst = mqx_ntohl(ip_hdr->DEST);
mqx_htonl(ip_hdr->SOURCE, ipdst);
mqx_htonl(ip_hdr->DEST,ipsrc);
// call NAT
error = (*nat_exec)(&origpcb);
if (!error) {
// swap IPs and ports back
ip_hdr = (IP_HEADER_PTR)RTCSPCB_DATA(origpcb);
protocol = mqx_ntohc(ip_hdr->PROTOCOL);
// swap ports if it is udp or tcp
if ((protocol == IPPROTO_TCP) || (protocol == IPPROTO_UDP)) {
switch(protocol)
{
case IPPROTO_TCP:
tcp_hdr = (TCP_HEADER_PTR)((unsigned char *)ip_hdr + IPH_LEN(ip_hdr));
dest_port = mqx_ntohs(tcp_hdr->dest_port);
src_port = mqx_ntohs(tcp_hdr->source_port);
mqx_htons(tcp_hdr->dest_port, src_port);
mqx_htons(tcp_hdr->source_port, dest_port);
break;
case IPPROTO_UDP:
udp_hdr = (UDP_HEADER_PTR)((unsigned char *)ip_hdr + IPH_LEN(ip_hdr));
dest_port = mqx_ntohs(udp_hdr->DEST_PORT);
src_port = mqx_ntohs(udp_hdr->SRC_PORT);
mqx_htons(udp_hdr->DEST_PORT, src_port);
mqx_htons(udp_hdr->SRC_PORT, dest_port);
break;
default:
// should not get here
break;
}
}
// swap IPs
ipsrc = mqx_ntohl(ip_hdr->SOURCE);
ipdst = mqx_ntohl(ip_hdr->DEST);
mqx_htonl(ip_hdr->SOURCE, ipdst);
mqx_htonl(ip_hdr->DEST,ipsrc);
// Recalculate the cksum
mqx_htons(icmph->HEAD.CHECKSUM, 0);
checksum = IP_Sum_PCB (0, pcb);
checksum = IP_Sum_invert(checksum);
mqx_htons(icmph->HEAD.CHECKSUM, checksum);
// recalculate icmpsrc, and use new ipsrc.
ipdst = mqx_ntohl(ip_hdr->DEST);
ipsrc = mqx_ntohl(ip_hdr->SOURCE);
icmpsrc = IP_is_local(NULL,ipdst) ? ipdst : INADDR_ANY;
}
}
#endif
/* Send it */
IP_send(pcb, IPPROTO_ICMP, icmpsrc, ipsrc, 0);
} /* Endbody */
static bool LCP_recvextcode
(
PPPFSM_CFG_PTR fsm
/* [IN] - State Machine */
)
{ /* Body */
PPP_CFG_PTR ppp_ptr = fsm->HANDLE;
LCP_CFG_PTR lcp_ptr = fsm->PRIVATE;
PPP_CALL_INTERNAL_PTR call_ptr = &ppp_ptr->LCP_CALL[PPP_CALL_ECHO_REPLY];
switch (fsm->CODE) {
case LCP_CODE_PROT_REJ:
lcp_ptr->ST_LCP_RX_REJECT++;
/*
** We should notify the rejected protocol, but there
** currently isn't any way to do this. What we'll do
** instead is to send a STOP message to the Tx task on
** behalf of the protocol.
**
** This will usually be sufficient, since the rejected
** protocol isn't likely to send another packet until
** either it receives a packet (in which case it's OK to
** reply) or the retransmission timer kicks in (which
** we're about to disable).
**
** Thus, this will effectively stop the rejected protocol.
*/
if (fsm->LENGTH >= 2) {
uint16_t protocol = mqx_ntohs(fsm->DATA);
PPP_send_stop(ppp_ptr, protocol);
} /* Endif */
PCB_free(fsm->PACKET);
break;
case LCP_CODE_ECHO_REQ:
lcp_ptr->ST_LCP_RX_ECHO++;
if (fsm->STATE < PPP_STATE_OPENED) {
PCB_free(fsm->PACKET);
} else {
mqx_htonc(fsm->DATA - CP_HDR_LEN, LCP_CODE_ECHO_REP);
mqx_htonl(fsm->DATA, 0); /* Set magic field to 0 */
lcp_ptr->ST_LCP_TX_REPLY++;
PPP_send_one(ppp_ptr, PPP_PROT_LCP, fsm->PACKET);
} /* Endif */
break;
case LCP_CODE_ECHO_REP:
lcp_ptr->ST_LCP_RX_REPLY++;
if (call_ptr->CALLBACK) {
call_ptr->CALLBACK(call_ptr->PARAM, fsm->ID, fsm->PACKET);
} /* Endif */
PCB_free(fsm->PACKET);
break;
case LCP_CODE_DISC_REQ:
lcp_ptr->ST_LCP_RX_DISCARD++;
PCB_free(fsm->PACKET);
break;
default:
return FALSE;
} /* Endswitch */
return TRUE;
} /* Endbody */
uint32_t DNS_is_dotted_domain_name
(
unsigned char *domain_name,
unsigned char *qname_buffer
)
{ /* Body */
uint32_t total_length = 0;
uint32_t error;
unsigned char *label_length_ptr;
unsigned char label_length = 0;
if ( domain_name[total_length] == '\0' ) {
return( RTCSERR_DNS_INVALID_NAME );
}/* Endif */
/* If the request is for the ROOT Domain Name */
if ( ( domain_name[total_length] == '.' )
&& ( domain_name[total_length + 1] == '\0' )) {
mqx_htonc(qname_buffer, '\0');
return( DNS_OK );
}/* Endif */
label_length_ptr = qname_buffer;
error = DNS_OK;
while ( domain_name[total_length] != '\0' ) {
/*
** RFC 1035 says labels must start with a letter, but in practice
** some aren't
*/
if ( isalnum(domain_name[total_length]) ) {
mqx_htonc((qname_buffer + total_length + 1), domain_name[total_length]);
total_length++;
label_length++;
} else {
error = RTCSERR_DNS_INVALID_NAME;
break;
} /* Endif */
while ( ( domain_name[total_length] != '.') &&
( domain_name[total_length] != '\0' ) ) {
/* Domain Name characters can only be letters, hyphens, or numbers */
if ( (isalnum(domain_name[total_length]) ||
domain_name[total_length] == '-' ) &&
total_length < DNS_MAX_CHARS_IN_NAME &&
label_length <= DNS_MAX_LABEL_LENGTH ) {
mqx_htonc((qname_buffer + total_length + 1), domain_name[total_length]);
total_length++;
label_length++;
} else {
error = RTCSERR_DNS_INVALID_NAME;
break;
} /* Endif */
} /* Endwhile */
if ( error == RTCSERR_DNS_INVALID_NAME ) {
break;
}/* Endif */
mqx_htonc(label_length_ptr, label_length);
label_length = 0;
if ( domain_name[total_length] != '\0' ) {
label_length_ptr = qname_buffer + total_length + 1;
} else {
/* It's NULL, append the local network name */
error = DNS_append_local_name( qname_buffer, total_length + 1 );
return( error );
} /* Endif */
total_length++;
} /* Endwhile */
if ( error == DNS_OK ) {
/*
** Need to append '\0' to terminate domain name properly.
** This denotes the ROOT domain
*/
mqx_htonc(label_length_ptr, '\0');
}/* Endif */
return( error );
} /* Endbody */
uint32_t DNS_is_dotted_IP_addr
(
unsigned char *name,
unsigned char *fill_buffer_ptr
)
{ /* Body */
uint32_t i;
uint32_t j = 0;
uint32_t k;
uint32_t size = 0;
uint32_t digit_count = 0;
uint32_t dot_count = 0;
int32_t byte_num;
uint32_t addr_number = 0;
unsigned char number_chars[4];
unsigned char actual_number;
unsigned char addr[4][3];
unsigned char *number_buffer_ptr;
unsigned char appended_name[12] = {"in-addr.arpa"};
bool leading_zero;
/*
** first check to see if name is written in correct dotted decimal
** IP address format
*/
for (i=0; name[i] != '\0'; ++i ) {
if ( name[i] == '.' ) {
dot_count++;
if ( dot_count > 3 ) {
/* invalid IP address */
return( RTCSERR_DNS_INVALID_IP_ADDR );
}/* Endif */
if ( digit_count == 0 ) {
/* there are no digits before the '.' */
return( RTCSERR_DNS_INVALID_IP_ADDR );
}/* Endif */
byte_num = byte_num / 10; /* shift back */
if ( (byte_num < 0 ) || (byte_num > 255) ) {
/* if the number does fall within this range it's invalid */
return( RTCSERR_DNS_INVALID_IP_ADDR );
} else {
addr_number++;
number_chars[j] = digit_count;
j++;
digit_count = 0;
} /* Endif */
} else { /* a digit */
if ( digit_count == 0 ) {
byte_num = 0;
}/* Endif */
++digit_count;
if ( digit_count > 3 ) {
/* too many digits between the '.' */
return( RTCSERR_DNS_INVALID_IP_ADDR );
}/* Endif */
if ( isdigit(name[i]) ) {
/* number is in range */
addr[addr_number][digit_count - 1] = name[i];
byte_num = byte_num + name[i] - '0';
byte_num = byte_num * 10;
} else {
/* if the characters are not decimal digits it's invalid */
return( RTCSERR_DNS_INVALID_IP_ADDR );
}/* Endif */
}/* Endif */
} /* Endfor */
if ( digit_count == 0 ) {
/* there are no digits after the last '.' */
return( RTCSERR_DNS_INVALID_IP_ADDR );
} /* Endif */
byte_num = byte_num / 10;
if ( (byte_num < 0 ) || (byte_num > 255) ) {
/* if the number does fall within this range it's invalid */
return( RTCSERR_DNS_INVALID_IP_ADDR );
} else {
number_chars[j] = digit_count;
} /* Endif */
if ( dot_count != 3 ) {
/* the wrong number of dots were found */
return( RTCSERR_DNS_INVALID_IP_ADDR );
}/* Endif */
/*
** If we got this far, it's a legal IP addr, reverse the numbers,
** in the fill_buffer and append "in-addr.arpa" to it.
*/
for ( i = 0; i < 4; i++) {
leading_zero = FALSE;
number_buffer_ptr = fill_buffer_ptr;
actual_number = number_chars[j];
mqx_htonc(fill_buffer_ptr, number_chars[j]);
fill_buffer_ptr++;
size++;
for ( k = 0; k < number_chars[j]; k++ ) {
if ( addr[addr_number][k] == '0' ) {
if ( addr[addr_number][k] == '0' && k == 0 ) {
leading_zero = TRUE;
actual_number--;
continue;
} /* Endif */
if ( addr[addr_number][k] == '0' && k == 1
&& leading_zero == TRUE && k < number_chars[j] ) {
actual_number--;
continue;
} /* Endif */
if ( addr[addr_number][k] == '0' && k == 1
&& leading_zero == TRUE && k == number_chars[j] ) {
mqx_htonc(fill_buffer_ptr, addr[addr_number][k]);
fill_buffer_ptr++;
mqx_htonc(number_buffer_ptr, actual_number);
number_buffer_ptr++;
size++;
break;
}/* Endif */
} /* Endif */
mqx_htonc(fill_buffer_ptr, addr[addr_number][k]);
fill_buffer_ptr++;
size++;
} /* Endfor */
addr_number--;
j--;
} /* Endfor */
mqx_htonc(fill_buffer_ptr, 7);
fill_buffer_ptr++;
for ( i = 0; i < 7; i++) {
mqx_htonc(fill_buffer_ptr, appended_name[i]);
fill_buffer_ptr++;
} /* Endfor */
mqx_htonc(fill_buffer_ptr, 4);
fill_buffer_ptr++;
i++;
for ( ; i < 12; i++) {
mqx_htonc(fill_buffer_ptr, appended_name[i]);
fill_buffer_ptr++;
} /* Endfor */
/*
** Need to append '\0' to terminate a domain name properly.
** This signifies the ROOT domain
*/
mqx_htonc(fill_buffer_ptr, '\0');
return( DNS_OK );
} /* Endbody */
static uint32_t LCP_buildconfreq
(
PPPFSM_CFG_PTR fsm,
/* [IN] - State Machine */
unsigned char *outp,
/* [IN] - free packet */
uint32_t sizeleft
/* [IN] - size of packet */
)
{ /* Body */
LCP_CFG_PTR lcp_ptr = fsm->PRIVATE;
uint32_t totlen = 0;
uint32_t aplen;
#define LCP_BREQ(ci,len) \
*outp++ = LCP_CI_ ## ci; \
*outp++ = len; \
totlen += len
/*
** Generate configuration information for each option
** we want to negotiate.
*/
if (lcp_ptr->RECV_NEG.NEG_MRU) {
if (sizeleft >= totlen+4) {
LCP_BREQ(MRU,4);
mqx_htons(outp, lcp_ptr->RECV_NEG.MRU); outp += 2;
} /* Endif */
} /* Endif */
if (lcp_ptr->RECV_NEG.NEG_ACCM) {
if (sizeleft >= totlen+6) {
LCP_BREQ(ACCM,6);
mqx_htonl(outp, lcp_ptr->RECV_NEG.ACCM); outp += 4;
} /* Endif */
} /* Endif */
if (lcp_ptr->RECV_NEG.NEG_AP) {
switch (lcp_ptr->RECV_NEG.AP) {
case PPP_PROT_CHAP: aplen = 5; break;
default: aplen = 4; break;
} /* Endswitch */
if (sizeleft >= totlen+aplen) {
LCP_BREQ(AP,aplen);
mqx_htons(outp, lcp_ptr->RECV_NEG.AP); outp += 2;
switch (lcp_ptr->RECV_NEG.AP) {
case PPP_PROT_CHAP:
mqx_htonc(outp, 5); outp++; /* Only MD5 supported */
break;
} /* Endswitch */
} /* Endif */
} /* Endif */
if (lcp_ptr->RECV_NEG.NEG_PFC) {
if (sizeleft >= totlen+2) {
LCP_BREQ(PFC,2);
} /* Endif */
} /* Endif */
if (lcp_ptr->RECV_NEG.NEG_ACFC) {
if (sizeleft >= totlen+2) {
LCP_BREQ(ACFC,2);
} /* Endif */
} /* Endif */
return totlen;
} /* Endbody */
