void NAT_ALG_TCP_checksum
(
IP_HEADER_PTR ip_header_ptr /* [IN] pointer to IP header */
)
{ /* Body */
TRANSPORT_UNION transport;
uint16_t checksum;
uint16_t protocol;
uint16_t iplen = IPH_LEN(ip_header_ptr);
uint16_t len = mqx_ntohs(ip_header_ptr->LENGTH) - iplen;
/* Get TCP header */
transport.PTR = TRANSPORT_PTR(ip_header_ptr);
mqx_htons(transport.TCP_PTR->checksum, 0); /* Clear checksum field */
protocol = mqx_ntohc(ip_header_ptr->PROTOCOL); /* PROTOCOL */
checksum = (uint16_t) _mem_sum_ip(protocol, 8, ip_header_ptr->SOURCE); /* IP SRC and DST ADDR */
checksum = (uint16_t) _mem_sum_ip(checksum, len, transport.PTR);
/* TCP LENGTH */
checksum = IP_Sum_immediate(checksum, len);
checksum = IP_Sum_invert(checksum);
mqx_htons(transport.TCP_PTR->checksum, checksum);
} /* Endbody */
void TFTPSRV_build_ACK
(
TFTP_TRANS_STRUCT_PTR trans_ptr
/* [IN/OUT] The transaction state */
)
{ /* Body */
mqx_htons(trans_ptr->SND.HEAD.OP, trans_ptr->SEND_OP);
mqx_htons(trans_ptr->SND.HEAD.BLOCK, trans_ptr->BLOCK);
trans_ptr->BLOCK++;
trans_ptr->SEND_SIZE = sizeof(TFTP_HEADER);
trans_ptr->NUM_RETRIES = 0;
} /* Endbody */
void LCP_sendprotrej
(
PCB_PTR pcb,
/* [IN] - packet to reject */
PPPFSM_CFG_PTR fsm
/* [IN/OUT] - State Machine */
)
{ /* Body */
#if RTCSCFG_ENABLE_IP4
PPP_CFG_PTR ppp_ptr = fsm->HANDLE;
LCP_CFG_PTR lcp_ptr = fsm->PRIVATE;
unsigned char *packet, *src, *dst;
uint16_t length;
uint16_t size = ppp_ptr->SEND_OPTIONS->MRU - CP_HDR_LEN;
length = pcb->FRAG[0].LENGTH;
packet = pcb->FRAG[0].FRAGMENT;
/* Truncate the packet if necessary */
if (length > size) {
length = size;
} /* Endif */
/* Make room for a Code-Reject header */
size = length + CP_HDR_LEN;
/* Copy the received packet (including protocol field) to the */
/* data portion of the Protocol-Reject */
src = packet + length;
dst = src + 2 + CP_HDR_LEN;
while (length--) *--dst = *--src;
/* Build a Code-Reject packet */
mqx_htons(packet, PPP_PROT_LCP); packet += 2;
*packet++ = LCP_CODE_PROT_REJ;
*packet++ = fsm->CURID;
fsm->CURID = (fsm->CURID + 1) & 0xFF;
mqx_htons(packet, size); packet += 2;
pcb->FRAG[0].LENGTH = size + 2;
lcp_ptr->ST_LCP_TX_REJECT++;
PPP_send_one(ppp_ptr, PPP_PROT_LCP, pcb);
#else
PCB_free(pcb);
#endif /* RTCSCFG_ENABLE_IP4 */
} /* Endbody */
PCB_PTR PPP_pcballoc
(
uint16_t protocol,
/* [IN] - PPP protocol */
uint32_t size
/* [IN] - max size of packet, excluding protocol */
)
{ /* Body */
PCB_FRAGMENT *pcb_frag_ptr;
PCB_PTR packet;
packet = _mem_alloc_system(sizeof(PCB) + sizeof(PCB_FRAGMENT) + 2 + size);
if (packet)
{
packet->FREE = (void (_CODE_PTR_)(PCB_PTR))_mem_free;
pcb_frag_ptr = packet->FRAG;
pcb_frag_ptr->LENGTH = size + 2;
pcb_frag_ptr->FRAGMENT = (unsigned char *)packet + sizeof(PCB) + sizeof(PCB_FRAGMENT);
mqx_htons(pcb_frag_ptr->FRAGMENT, protocol);
pcb_frag_ptr++;
pcb_frag_ptr->LENGTH = 0;
pcb_frag_ptr->FRAGMENT = NULL;
} /* Endif */
return packet;
} /* Endbody */
void TFTPSRV_build_DATA
(
TFTP_TRANS_STRUCT_PTR trans_ptr
/* [IN/OUT] The transaction state */
)
{ /* Body */
int32_t datalen;
datalen = RTCS_io_read(trans_ptr->TRANS_FILE_PTR, (char *)trans_ptr->SND.DATA, TFTP_DATA_SIZE);
if (datalen < 0) {
datalen = 0;
} /* Endif */
trans_ptr->BLOCK++;
mqx_htons(trans_ptr->SND.HEAD.OP, trans_ptr->SEND_OP);
mqx_htons(trans_ptr->SND.HEAD.BLOCK, trans_ptr->BLOCK);
trans_ptr->SEND_SIZE = sizeof(TFTP_HEADER) + datalen;
trans_ptr->NUM_RETRIES = 0;
trans_ptr->EXIT = (trans_ptr->SEND_SIZE < sizeof(TFTP_PACKET));
} /* 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 */
static void RIP_build_rte(
unsigned char *buf, /* [OUT] the route entry */
uint16_t family,
uint16_t rt_tag,
_ip_address net_addr,
_ip_address net_mask,
_ip_address next_hop,
uint32_t metric,
uint32_t rip_vers
)
{ /* Body */
RIP_ENTRY_PTR rte = (RIP_ENTRY_PTR)buf;
if (rip_vers == RIP_V2){
mqx_htons(rte->RT_TAG, rt_tag);
mqx_htonl(rte->NETMASK, net_mask);
mqx_htonl(rte->NEXTHOP, next_hop);
}else{
_mem_zero(buf, sizeof(RIP_ENTRY));
}
mqx_htons(rte->FAMILY, family);
mqx_htonl(rte->NETADDR, net_addr);
mqx_htonl(rte->METRIC, metric);
} /* 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 BOOTP_send
(
TCPIP_EVENT_PTR event
/* [IN/OUT] the resend event */
)
{ /* Body */
IP_IF_PTR if_ptr = (IP_IF_PTR)event->PRIVATE;
TCPIP_PARM_BOOTP *parms = (TCPIP_PARM_BOOTP *)if_ptr->BOOT;
BOOTP_CFG_PTR bootp = (BOOTP_CFG_PTR) &parms->config;
RTCSPCB_PTR pcb_ptr;
/* Set the event to trigger for the next retransmission (+/- 1 sec) */
bootp->RESEND.TIME = bootp->TIMEOUT + (RTCS_rand() & 0x7FF) - 0x400;
/* Allocate a PCB */
pcb_ptr = RTCSPCB_alloc_send();
if (pcb_ptr == NULL) {
return TRUE;
} /* Endif */
//RTCSLOG_PCB_ALLOC(pcb_ptr);
/* The only field that changes in BOOTREQUEST packets is 'secs' */
mqx_htons(bootp->PACKET.SECS, bootp->SECS);
bootp->SECS += bootp->RESEND.TIME >> 10; /* approx. divide by 1000 */
/* Double the timeout */
bootp->TIMEOUT <<= 1;
if (bootp->TIMEOUT > BOOTP_TIMEOUT_MAX) {
bootp->TIMEOUT = BOOTP_TIMEOUT_MAX;
} /* Endif */
/* Put the BOOTREQUEST in the PCB */
RTCSPCB_append_fragment(pcb_ptr, sizeof(BOOTP_HEADER), (unsigned char *)&bootp->PACKET);
RTCSPCB_append_fragment(pcb_ptr, sizeof(BOOTP_DATA), parms->data->SNAME);
RTCSLOG_PCB_WRITE(pcb_ptr, RTCS_LOGCTRL_PORT(IPPORT_BOOTPC), 0);
/* Send the datagram */
BOOT_send(pcb_ptr, if_ptr);
/* Always retransmit */
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 */
unsigned char *TFTP_read
(
uint32_t *size
/* [OUT] number of bytes read, or error code */
)
{ /* Body */
uint32_t sock;
sockaddr_in remote_addr;
uint16_t remote_size;
uint16_t ack_block;
uint16_t pkt_op, pkt_block;
uint32_t pkt_size;
uint32_t time_left;
bool expired;
#if TFTP_TIMEOUT_RETRIES
uint32_t retries = 0;
#endif
ack_block = mqx_ntohs(TFTP_config.ACK.BLOCK);
TFTP_timeout_restart(&TFTP_config.TIMEOUT);
for (;;) {
/* Check for timeout */
time_left = TFTP_timeout_left(&TFTP_config.TIMEOUT, &expired);
if (expired) {
#if TFTP_TIMEOUT_RETRIES
retries++;
if (retries > TFTP_TIMEOUT_RETRIES) {
*size = RTCSERR_TFTP_TIMEOUT;
TFTP_close();
return NULL;
} /* Endif */
#endif
/* Retransmit the last packet */
TFTP_RESEND();
} /* Endif */
/* Wait for a packet */
sock = TFTP_WAIT(time_left);
/* Timeout -- retransmit last packet */
if (sock != TFTP_config.SOCK) {
continue;
} /* Endif */
remote_size = sizeof(remote_addr);
pkt_size = TFTP_RECV(TFTP_config.PACKET);
pkt_op = mqx_ntohs(TFTP_config.PACKET.HEAD.OP);
pkt_block = mqx_ntohs(TFTP_config.PACKET.HEAD.BLOCK);
/* Check source address of received packet */
if (remote_addr.sin_addr.s_addr != TFTP_config.SADDR.sin_addr.s_addr) {
continue;
} /* Endif */
/* Validate source port */
if (ack_block && remote_addr.sin_port != TFTP_config.SADDR.sin_port) {
TFTP_SEND(TFTP_config.SOCK, _tftp_error_tid, remote_addr);
continue;
} /* Endif */
/* Check size of received packet */
if (pkt_size < sizeof(TFTP_HEADER)) {
TFTP_SEND(TFTP_config.SOCK, _tftp_error_op, remote_addr);
*size = RTCSERR_TFTP_ERROR + TFTPERR_ILLEGAL_OP;
TFTP_close();
return NULL;
} /* Endif */
/* Check for error packet */
if (pkt_op == TFTPOP_ERROR) {
*size = RTCSERR_TFTP_ERROR + pkt_block;
TFTP_close();
return NULL;
} /* Endif */
/* Check for data packet */
if ((pkt_op != TFTPOP_DATA)
|| (pkt_size > sizeof(TFTP_PACKET))) {
TFTP_SEND(TFTP_config.SOCK, _tftp_error_op, remote_addr);
*size = RTCSERR_TFTP_ERROR + TFTPERR_ILLEGAL_OP;
TFTP_close();
return NULL;
} /* Endif */
/* Check for retransmitted packet */
if (pkt_block == ack_block) {
TFTP_timeout_restart(&TFTP_config.TIMEOUT);
TFTP_SEND(TFTP_config.SOCK, TFTP_config.ACK, TFTP_config.SADDR);
continue;
} /* Endif */
/* Aknowledge also packets with lower id, some servers do retransmit them until they get an ack */
if (pkt_block < ack_block) {
TFTP_timeout_restart(&TFTP_config.TIMEOUT);
mqx_htons(TFTP_config.ACK.BLOCK, pkt_block);
TFTP_SEND(TFTP_config.SOCK, TFTP_config.ACK, TFTP_config.SADDR);
mqx_htons(TFTP_config.ACK.BLOCK, ack_block); /* Restore id of last acknowledged packet */
continue;
} /* Endif */
/* Drop unexpected packets */
if (pkt_block > ack_block+1) {
/* Some server do send more than one packet at a time, these will eventually retransmitted */
continue;
}
/* We have the next packet */
break;
} /* Endfor */
/* Update the adaptive timeout */
TFTP_timeout_update(&TFTP_config.TIMEOUT);
/* Free the original RRQ */
if (!ack_block) {
TFTP_config.SADDR.sin_port = remote_addr.sin_port;
_mem_free(TFTP_config.RRQ_PTR);
TFTP_config.RRQ_PTR = NULL;
} /* Endif */
/* ACK it */
ack_block++;
mqx_htons(TFTP_config.ACK.BLOCK, ack_block);
TFTP_SEND(TFTP_config.SOCK, TFTP_config.ACK, TFTP_config.SADDR);
TFTP_config.LAST = (pkt_size < sizeof(TFTP_PACKET));
/* Return the data */
*size = pkt_size - sizeof(TFTP_HEADER);
return TFTP_config.PACKET.DATA;
} /* Endbody */
HOSTENT_STRUCT *DNS_query_resolver_task
(
unsigned char *name,
uint16_t query_type
)
{ /* Body */
DNS_MESSAGE_HEADER_STRUCT *message_head_ptr;
DNS_MESSAGE_TAIL_STRUCT *message_tail_ptr;
HOSTENT_STRUCT *host_ptr = NULL;
sockaddr_in addr;
uint32_t local_sock;
uint32_t qname_size;
uint32_t buffer_size;
uint16_t rlen;
int32_t temp_size;
int32_t error;
unsigned char *temp_ptr;
unsigned char *qname_ptr;
unsigned char *buffer_ptr;
/*
** If the size of this buffer is changed, also change the buffer size
** in the recvfrom() call near the bottom of this function
*/
buffer_ptr = RTCS_mem_alloc_zero( DNS_MAX_UDP_MESSAGE_SIZE );
if ( buffer_ptr == NULL ) {
RTCS_log_error(ERROR_DNS, RTCSERR_DNS_UNABLE_TO_ALLOCATE_MEMORY,
0, 0, 0);
return( NULL );
}/* Endif */
_mem_set_type(buffer_ptr, MEM_TYPE_DNS_UDP_MESSAGE);
qname_ptr = buffer_ptr + sizeof( DNS_MESSAGE_HEADER_STRUCT );
if ( query_type == DNS_A ) {
error = DNS_is_dotted_domain_name( name, qname_ptr );
if ( error == RTCSERR_DNS_INVALID_NAME ||
error == RTCSERR_DNS_INVALID_LOCAL_NAME ) {
_mem_free(buffer_ptr);
return( NULL );
}/* Endif */
} else {
if ( query_type == DNS_PTR ) {
error = DNS_insert_IP_query( name, qname_ptr );
if ( error == RTCSERR_DNS_INVALID_IP_ADDR ) {
_mem_free(buffer_ptr);
return( NULL );
}/* Endif */
} else {
_mem_free(buffer_ptr);
return( NULL );
} /* Endif */
} /* Endif */
local_sock = socket(AF_INET, SOCK_DGRAM, 0);
if ( local_sock == RTCS_HANDLE_ERROR ) {
RTCS_log_error(ERROR_DNS, RTCSERR_DNS_UNABLE_TO_OPEN_SOCKET,
0, 0, 0);
_mem_free(buffer_ptr);
return( NULL );
}/* Endif */
/* Local address */
addr.sin_family = AF_INET;
addr.sin_port = 0;
addr.sin_addr.s_addr = INADDR_ANY;
error = bind(local_sock, &addr, sizeof(addr));
if (error != RTCS_OK) {
RTCS_log_error(ERROR_DNS, RTCSERR_DNS_UNABLE_TO_BIND_SOCKET,
0, 0, 0);
_mem_free(buffer_ptr);
return( NULL );
} /* Endif */
/* set up buffer for sending query. */
message_head_ptr = (DNS_MESSAGE_HEADER_STRUCT *)buffer_ptr;
mqx_htons(message_head_ptr->ID, 0);
mqx_htons(message_head_ptr->CONTROL, DNS_STANDARD_QUERY);
mqx_htons(message_head_ptr->QDCOUNT, DNS_SINGLE_QUERY);
mqx_htons(message_head_ptr->NSCOUNT, 0);
mqx_htons(message_head_ptr->ARCOUNT, 0);
mqx_htons(message_head_ptr->ANCOUNT, 0);
qname_size = strlen((char *)qname_ptr );
/* Need to include the last '\0' character as well */
qname_size++;
temp_ptr = buffer_ptr + sizeof( DNS_MESSAGE_HEADER_STRUCT )
+ qname_size;
message_tail_ptr = (DNS_MESSAGE_TAIL_STRUCT *)temp_ptr;
mqx_htons(message_tail_ptr->QTYPE, query_type);
mqx_htons(message_tail_ptr->QCLASS, DNS_IN);
buffer_size = sizeof(DNS_MESSAGE_HEADER_STRUCT) + qname_size
+ sizeof(DNS_MESSAGE_TAIL_STRUCT);
/* Remote address, DNS_Resolver currently uses port 1024 */
addr.sin_port = DNS_RESOLVER_PORT;
addr.sin_addr.s_addr = DNS_RESOLVER_IP_ADDR;
rlen = sizeof(addr);
/* Send the buffer to the resolver for making a query */
error = sendto(local_sock, buffer_ptr, buffer_size, 0, &addr, rlen);
if (error == RTCS_ERROR) {
shutdown(local_sock, FLAG_ABORT_CONNECTION);
RTCS_log_error(ERROR_DNS, RTCSERR_DNS_UNABLE_TO_SEND_QUERY,
0, 0, 0);
_mem_free(buffer_ptr);
return( NULL );
}/* Endif */
/* Get the response from the resolver, if none received, return NULL */
error = (uint32_t)RTCS_selectset( &local_sock, 1, DNS_QUERY_TIMEOUT );
if ( !error || error == RTCS_ERROR ) {
shutdown(local_sock, FLAG_ABORT_CONNECTION);
RTCS_log_error(ERROR_DNS, RTCSERR_DNS_NO_RESPONSE_FROM_RESOLVER,
0, 0, 0);
_mem_free(buffer_ptr);
return( NULL );
} /* Endif */
temp_size = recvfrom(local_sock, buffer_ptr, DNS_MAX_UDP_MESSAGE_SIZE,
0, &addr, &rlen);
if ( temp_size == RTCS_ERROR ) {
shutdown(local_sock, FLAG_ABORT_CONNECTION);
RTCS_log_error(ERROR_DNS, RTCSERR_DNS_PACKET_RECEPTION_ERROR,
0, 0, 0);
_mem_free(buffer_ptr);
return( NULL );
}/* Endif */
host_ptr = DNS_parse_UDP_response(buffer_ptr, name, query_type);
shutdown(local_sock, FLAG_ABORT_CONNECTION);
_mem_free(buffer_ptr);
return( host_ptr );
} /* 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;
}
static RTCSPCB_PTR IPREASM_reasm_dgram
(
IP_DGRAM_PTR dgram /* [IN] the dgram descriptor */
)
{ /* Body */
RTCSPCB_PTR outpcb;
PCB_PTR bpcb;
PCB_FRAGMENT *pcb_frag_ptr;
unsigned char *data;
uint32_t iphlen = (mqx_ntohc(dgram->header.IP4.IPH.VERSLEN) & 0xF) << 2;
uint32_t ip_totlen = iphlen + dgram->TOTLEN;
bpcb = RTCS_mem_alloc_system(sizeof(PCB) + sizeof(PCB_FRAGMENT) + ip_totlen);
if (!bpcb) {
return NULL;
} /* Endif */
data = (unsigned char *)bpcb + sizeof(PCB) + sizeof(PCB_FRAGMENT);
bpcb->FREE = (void(_CODE_PTR_)(PCB_PTR))_mem_free;
bpcb->PRIVATE = NULL;
pcb_frag_ptr = bpcb->FRAG;
pcb_frag_ptr->LENGTH = ip_totlen;
pcb_frag_ptr->FRAGMENT = data;
pcb_frag_ptr++;
pcb_frag_ptr->LENGTH = 0;
pcb_frag_ptr->FRAGMENT = NULL;
/* Copy the IP header with options */
mqx_htons(dgram->header.IP4.IPH.FRAGMENT, 0);
_mem_copy(&dgram->header.IP4.IPH, data, iphlen);
data += iphlen;
/*
** At this point, we really should update the LENGTH
** and CHECKSUM fields in the new IP header, but we
** don't actually need to, because this datagram is
** going straight to IPLOCAL_service, which doesn't
** check these things.
*/
/* Copy the stored data in the new packet */
IPREASM_blk_read_all(dgram, data, dgram->TOTLEN);
/* Put it in an RTCSPCB */
outpcb = RTCSPCB_alloc_recv(bpcb);
if (outpcb == NULL) {
PCB_free(bpcb);
return NULL;
} /* Endif */
//RTCSLOG_PCB_ALLOC(bpcb);
outpcb->IFSRC = dgram->IFSRC;
outpcb->TYPE = dgram->TYPE;
outpcb->LINK_OPTIONS.RX = dgram->LINKOPT;
RTCSPCB_DATA_NETWORK(outpcb) = RTCSPCB_DATA(outpcb);
RTCSPCB_SET_TRANS_PROTL(outpcb, dgram->header.IP4.PROTO);
RTCSPCB_SET_TRANS_DELTA(outpcb, iphlen);
/* Delete the local structure */
IPREASM_del_dgram(dgram);
return outpcb;
} /* Endbody */
uint32_t PPP_send
(
_ppp_handle handle,
/* [IN] - the PPP state structure */
uint16_t protocol,
/* [IN] - protocol for the packet */
PCB_PTR pcb
/* [IN] - the packet to send */
)
{ /* Body */
#if RTCSCFG_ENABLE_IP4
PPP_CFG_PTR ppp_ptr = handle;
PCB_FRAGMENT_PTR frag_ptr;
uint32_t size, mru;
uint32_t error;
/* Do some error checking */
if (ppp_ptr->VALID != PPP_VALID) {
PCB_free(pcb);
return RTCSERR_PPP_INVALID_HANDLE;
} else if (!(protocol&1) || (protocol&0x100)) {
PCB_free(pcb);
return RTCSERR_PPP_INVALID_PROTOCOL;
} /* Endif */
error = PPP_OK;
PPP_mutex_lock(&ppp_ptr->MUTEX);
if (!ppp_ptr->LINK_STATE) {
error = RTCSERR_PPP_LINK_NOT_OPEN;
} else {
/* SPR P122-0371-01 */
/* PCB includes 2-byte protocol field, but negotiated MRU doesn't */
mru = ppp_ptr->SEND_OPTIONS->MRU + 2;
/* End SPR P122-0371-01 */
} /* Endif */
PPP_mutex_unlock(&ppp_ptr->MUTEX);
if (error) {
PCB_free(pcb);
return error;
} /* Endif */
/*
** Make sure the first fragment is long enough for the PPP protocol
** field. This isn't strictly necessary, but it's impractical
** to split a 2 byte field over multiple fragments.
*/
if (pcb->FRAG[0].LENGTH < 2) {
PCB_free(pcb);
return RTCSERR_PPP_PACKET_TOO_SHORT;
} /* 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 = 0;
for (frag_ptr = pcb->FRAG; frag_ptr->LENGTH; frag_ptr++) {
if (frag_ptr->LENGTH > mru) {
PCB_free(pcb);
return RTCSERR_PPP_PACKET_TOO_LONG;
} /* Endif */
size += frag_ptr->LENGTH;
} /* Endfor */
/*
** Make sure that the total sum of the fragments doesn't exceed
** a maximum packet length.
*/
if (size > mru) {
PCB_free(pcb);
return RTCSERR_PPP_PACKET_TOO_LONG;
} /* Endif */
/*
** Everything checks out -- send the packet to the Tx task.
*/
mqx_htons(pcb->FRAG[0].FRAGMENT, protocol);
return PPP_send_one(ppp_ptr, protocol, pcb);
#else
return RTCSERR_IP_IS_DISABLED;
#endif /* RTCSCFG_ENABLE_IP4 */
} /* Endbody */
uint32_t TFTP_open
(
void *ft_data
/* [IN] the address and filename of the bootimage */
)
{ /* Body */
TFTP_DATA_STRUCT_PTR tftp;
sockaddr_in local_addr;
char *str_ptr;
unsigned char *packet;
uint32_t sock;
uint32_t error;
uint32_t fn_len, fm_len;
uint32_t pkt_len;
tftp = (TFTP_DATA_STRUCT_PTR) ft_data;
/* Get a socket */
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock == RTCS_SOCKET_ERROR) {
return RTCSERR_TFTP_SOCKET;
} /* Endif */
/* Must be initialized in order for TFTP_close to be able to release socket and memory */
TFTP_config.SOCK = sock;
TFTP_config.RRQ_PTR = NULL;
/* Bind it */
local_addr.sin_family = AF_INET;
local_addr.sin_port = 0;
local_addr.sin_addr.s_addr = INADDR_ANY;
error = bind(sock, (const sockaddr *)&local_addr, sizeof(local_addr));
if (error != RTCS_OK) {
TFTP_close();
return error;
} /* Endif */
if ( (tftp->FILENAME == NULL) || (tftp->FILEMODE == NULL) ){
TFTP_close();
return TFTPERR_FILE_NOT_FOUND;
} /* Endif */
/* Prepare a read request (RRQ) */
str_ptr = tftp->FILENAME;
while (*str_ptr++) {};
fn_len = str_ptr - tftp->FILENAME;
str_ptr = tftp->FILEMODE;
while (*str_ptr++) {};
fm_len = str_ptr - tftp->FILEMODE;
pkt_len = 2 + fn_len + fm_len;
packet = RTCS_mem_alloc(pkt_len);
if (packet == NULL) {
TFTP_close();
return RTCSERR_TFTP_RRQ_ALLOC;
} /* Endif */
_mem_set_type(packet, MEM_TYPE_TFTP_PACKET);
TFTP_config.RRQ_PTR = packet;
mqx_htons(packet, TFTPOP_RRQ);
_mem_copy(tftp->FILENAME, &packet[ 2], fn_len);
_mem_copy(tftp->FILEMODE, &packet[fn_len+2], fm_len);
/* Send the RRQ */
TFTP_config.SOCK = sock;
TFTP_config.SADDR.sin_family = AF_INET;
TFTP_config.SADDR.sin_port = IPPORT_TFTP;
TFTP_config.SADDR.sin_addr.s_addr = tftp->SERVER;
TFTP_timeout_init(&TFTP_config.TIMEOUT);
error = sendto(sock, packet, pkt_len, 0,
(sockaddr *)(&TFTP_config.SADDR), sizeof(TFTP_config.SADDR));
if (error != pkt_len) {
TFTP_close();
return RTCSERR_TFTP_RRQ_SEND;
} /* Endif */
/* Initialize the TFTP client */
TFTP_config.RRQ_PTR = packet;
TFTP_config.RRQ_LEN = pkt_len;
TFTP_config.LAST = FALSE;
mqx_htons(TFTP_config.ACK.OP, TFTPOP_ACK);
mqx_htons(TFTP_config.ACK.BLOCK, 0);
return RTCS_OK;
} /* 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 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 uint32_t LCP_recvconfreq
(
PPPFSM_CFG_PTR fsm,
/* [IN] - State Machine */
bool reject
/* [IN] - whether to ConfRej if we disagree */
)
{ /* Body */
LCP_CFG_PTR lcp_ptr = fsm->PRIVATE;
unsigned char *inp = fsm->DATA;
unsigned char *nakp, *rejp;
uint32_t sizeleft = fsm->LENGTH;
uint32_t naklen, rejlen;
bool apneg = FALSE;
PPP_OPT req_opt = lcp_ptr->SEND_OPT;
unsigned char code;
unsigned char cicode, cilen;
/* Start CR 2207 */
#if PPP_SECRETS_NOT_SHARED
PPP_CFG_PTR ppp_ptr = lcp_ptr->HANDLE;
#endif
/* End CR 2207 */
#define CI_REJECT(n) \
inp -= n; \
code = CP_CODE_CONF_REJ; \
rejlen += cilen; \
while (cilen--) *rejp++ = *inp++
#define CI_NAK \
if (code != CP_CODE_CONF_REJ) { \
code = CP_CODE_CONF_NAK; \
if (reject) { \
inp -= cilen; \
naklen += cilen; \
while (cilen--) *nakp++ = *inp++; \
} else { \
apneg = FALSE;
#define CI_ENDNAK \
} /* Endif */ \
} /* Endif */
#define CI_NAKAP(n) \
if (code != CP_CODE_CONF_REJ) { \
code = CP_CODE_CONF_NAK; \
if (reject) { \
inp -= n; \
naklen += cilen; \
while (cilen--) *nakp++ = *inp++; \
} else { \
apneg = TRUE; \
inp += cilen - n; \
} /* Endif */ \
} else { \
inp += cilen - n; \
} /* Endif */
/*
** Process all requested codes
*/
rejp = nakp = inp;
rejlen = naklen = 0;
code = CP_CODE_CONF_ACK;
while (sizeleft) {
/* check remaining length */
if (sizeleft < inp[1] || inp[1] < 2) {
code = CP_CODE_CONF_REJ;
rejlen += sizeleft;
while (sizeleft--) *rejp++ = *inp++;
break;
} /* Endif */
cicode = *inp++;
sizeleft -= cilen = *inp++;
switch (cicode) {
case LCP_CI_MRU:
if (cilen != 4) {
CI_REJECT(2);
break;
} /* Endif */
/* Accept any MRU no smaller than 68 bytes */
req_opt.MRU = mqx_ntohs(inp); inp += 2;
if (req_opt.MRU > DEFAULT_MRU) {
req_opt.MRU = DEFAULT_MRU;
} else if (req_opt.MRU < MINIMUM_MRU) {
CI_NAK {
*nakp++ = LCP_CI_MRU;
naklen += *nakp++ = 4;
req_opt.MRU = MINIMUM_MRU;
mqx_htons(nakp, req_opt.MRU); nakp += 2;
} CI_ENDNAK;
} /* Endif */
break;
case LCP_CI_ACCM:
if (cilen != 6) {
CI_REJECT(2);
break;
} /* Endif */
/* If we want any characters not in their ACCM, nak it */
req_opt.ACCM = mqx_ntohl(inp); inp += 4;
if ((req_opt.ACCM & _PPP_ACCM) != _PPP_ACCM) {
CI_NAK {
*nakp++ = LCP_CI_ACCM;
naklen += *nakp++ = 6;
req_opt.ACCM |= _PPP_ACCM;
mqx_htonl(nakp, req_opt.ACCM); nakp += 4;
} CI_ENDNAK;
} /* Endif */
break;
/*
** AP is unusual in that it is a variable length
** option. Thus it is possible that we may want
** to nak AP and make a suggestion longer than
** the peer's request.
**
** This is bad.
**
** It's bad because this function wants to reuse
** the incoming ConfReq to build the reply, and
** in this case, it is possible for nakp to
** overtake inp, thus overwriting an option not
** yet parsed.
**
** So we do the following: If we decide to nak
** the requested AP, we just set apneg=TRUE and
** append the nak'd AP at the end of our ConfNak
** after we've completed parsing the ConfReq.
**
** Note that we won't nak AP if we generate
** nak's for other options afterward, because
** the RFC states that nak'd options MUST be in
** the same order that they were in the ConfReq.
*/
case LCP_CI_AP:
if (cilen < 4) {
CI_REJECT(2);
break;
} /* Endif */
/* If we don't have any secrets, reject AP */
/* Start CR 2207 */
if (!(PPP_SECRET(ppp_ptr,_PPP_PAP_LSECRET) || PPP_SECRET(ppp_ptr,_PPP_CHAP_LSECRETS))) {
/* End CR 2207 */
CI_REJECT(2);
break;
} /* Endif */
/* Check the desired authentication protocol */
req_opt.AP = mqx_ntohs(inp); inp += 2;
switch (req_opt.AP) {
/* Accept PAP only if we have a secret */
case PPP_PROT_PAP:
if (cilen != 4) {
CI_REJECT(4);
break;
/* Start CR 2207 */
} else if (PPP_SECRET(ppp_ptr,_PPP_PAP_LSECRET) == NULL) {
/* End CR 2207 */
CI_NAKAP(4);
break;
} /* Endif */
req_opt.AP_Start = PAP_send;
break;
/* Accept CHAP only if we have a secrets table */
case PPP_PROT_CHAP:
if (cilen != 5) {
CI_REJECT(4);
break;
/* Start CR 2207 */
} else if (PPP_SECRET(ppp_ptr,_PPP_CHAP_LSECRETS) == NULL) {
/* End CR 2207 */
CI_NAKAP(4);
break;
} else if (*inp++ != 5) { /* Only MD5 supported */
CI_NAKAP(5);
break;
} /* Endif */
req_opt.AP_Start = CHAP_open;
break;
default:
CI_NAKAP(4);
break;
} /* Endswitch */
break;
case LCP_CI_MAGIC:
if (cilen != 6) {
CI_REJECT(2);
break;
} /* Endif */
inp += 4;
break;
case LCP_CI_PFC:
if (cilen != 2) {
CI_REJECT(2);
break;
} /* Endif */
req_opt.PFC = TRUE;
break;
case LCP_CI_ACFC:
if (cilen != 2) {
CI_REJECT(2);
break;
} /* Endif */
req_opt.ACFC = TRUE;
break;
default:
CI_REJECT(2);
break;
} /* Endswitch */
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 */