Ilya Krylov
123
Diff: utility/uip.c
- Revision:
- 4:d774541a34da
- Parent:
- 3:5b17e4656dd0
- Child:
- 8:4acb22344932
--- a/utility/uip.c Sat Dec 20 11:10:40 2014 +0000
+++ b/utility/uip.c Sun Mar 08 20:26:56 2015 +0000
@@ -136,48 +136,48 @@
#endif
#ifndef UIP_CONF_EXTERNAL_BUFFER
u8_t uip_buf[UIP_BUFSIZE + 2]; /* The packet buffer that contains
- incoming packets. */
+ incoming packets. */
#endif /* UIP_CONF_EXTERNAL_BUFFER */
void* uip_appdata; /* The uip_appdata pointer points to
- application data. */
+ application data. */
void* uip_sappdata; /* The uip_appdata pointer points to
- the application data which is to
- be sent. */
+ the application data which is to
+ be sent. */
#if UIP_URGDATA > 0
void* uip_urgdata; /* The uip_urgdata pointer points to
- urgent data (out-of-band data), if
- present. */
+ urgent data (out-of-band data), if
+ present. */
u16_t uip_urglen, uip_surglen;
#endif /* UIP_URGDATA > 0 */
u16_t uip_len, uip_slen;
/* The uip_len is either 8 or 16 bits,
- depending on the maximum packet
- size. */
+ depending on the maximum packet
+ size. */
u8_t uip_flags; /* The uip_flags variable is used for
- communication between the TCP/IP stack
- and the application program. */
+ communication between the TCP/IP stack
+ and the application program. */
struct uip_conn* uip_conn; /* uip_conn always points to the current
- connection. */
+ connection. */
struct uip_conn uip_conns[UIP_CONNS];
/* The uip_conns array holds all TCP
- connections. */
+ connections. */
u16_t uip_listenports[UIP_LISTENPORTS];
/* The uip_listenports list all currently
- listning ports. */
+ listning ports. */
#if UIP_UDP
struct uip_udp_conn* uip_udp_conn;
struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
#endif /* UIP_UDP */
static u16_t ipid; /* Ths ipid variable is an increasing
- number that is used for the IP ID
- field. */
+ number that is used for the IP ID
+ field. */
/**
* @brief
@@ -185,16 +185,17 @@
* @param
* @retval
*/
+
void uip_setipid(u16_t id) {
ipid = id;
}
static u8_t iss[4]; /* The iss variable is used for the TCP
- initial sequence number. */
+ initial sequence number. */
#if UIP_ACTIVE_OPEN
static u16_t lastport; /* Keeps track of the last port used for
- a new connection. */
+ a new connection. */
#endif /* UIP_ACTIVE_OPEN */
/* Temporary variables. */
@@ -598,6 +599,7 @@
* @param
* @retval
*/
+
static u8_t uip_reass(void) {
u16_t offset, len;
u16_t i;
@@ -645,14 +647,14 @@
if(offset / (8 * 8) == (offset + len) / (8 * 8)) {
/* If the two endpoints are in the same byte, we only update
- that byte. */
+ that byte. */
uip_reassbitmap[offset / (8 * 8)] |= bitmap_bits[(offset / 8) & 7] &~bitmap_bits[((offset + len) / 8) & 7];
}
else {
/* If the two endpoints are in different bytes, we update the
- bytes in the endpoints and fill the stuff inbetween with
- 0xff. */
+ bytes in the endpoints and fill the stuff inbetween with
+ 0xff. */
uip_reassbitmap[offset / (8 * 8)] |= bitmap_bits[(offset / 8) & 7];
for(i = 1 + offset / (8 * 8); i < (offset + len) / (8 * 8); ++i) {
uip_reassbitmap[i] = 0xff;
@@ -677,7 +679,7 @@
if(uip_reassflags & UIP_REASS_FLAG_LASTFRAG) {
/* Check all bytes up to and including all but the last byte in
- the bitmap. */
+ the bitmap. */
for(i = 0; i < uip_reasslen / (8 * 8) - 1; ++i) {
if(uip_reassbitmap[i] != 0xff) {
goto nullreturn;
@@ -685,19 +687,19 @@
}
/* Check the last byte in the bitmap. It should contain just the
- right amount of bits. */
+ right amount of bits. */
if(uip_reassbitmap[uip_reasslen / (8 * 8)] != (u8_t)~bitmap_bits[uip_reasslen / 8 & 7]) {
goto nullreturn;
}
/* If we have come this far, we have a full packet in the
- buffer, so we allocate a pbuf and copy the packet into it. We
- also reset the timer. */
+ buffer, so we allocate a pbuf and copy the packet into it. We
+ also reset the timer. */
uip_reasstmr = 0;
memcpy(BUF, FBUF, uip_reasslen);
/* Pretend to be a "normal" (i.e., not fragmented) IP packet
- from now on. */
+ from now on. */
BUF->ipoffset[0] = BUF->ipoffset[1] = 0;
BUF->len[0] = uip_reasslen >> 8;
BUF->len[1] = uip_reasslen & 0xff;
@@ -784,8 +786,8 @@
if(uip_connr->tcpstateflags != UIP_CLOSED) {
/* If the connection has outstanding data, we increase the
- connection's timer and see if it has reached the RTO value
- in which case we retransmit. */
+ connection's timer and see if it has reached the RTO value
+ in which case we retransmit. */
if(uip_outstanding(uip_connr)) {
if(uip_connr->timer-- == 0) {
if
@@ -799,8 +801,8 @@
uip_connr->tcpstateflags = UIP_CLOSED;
/* We call UIP_APPCALL() with uip_flags set to
- UIP_TIMEDOUT to inform the application that the
- connection has timed out. */
+ UIP_TIMEDOUT to inform the application that the
+ connection has timed out. */
uip_flags = UIP_TIMEDOUT;
UIP_APPCALL();
@@ -814,11 +816,11 @@
++(uip_connr->nrtx);
/* Ok, so we need to retransmit. We do this differently
- depending on which state we are in. In ESTABLISHED, we
- call upon the application so that it may prepare the
- data for the retransmit. In SYN_RCVD, we resend the
- SYNACK that we sent earlier and in LAST_ACK we have to
- retransmit our FINACK. */
+ depending on which state we are in. In ESTABLISHED, we
+ call upon the application so that it may prepare the
+ data for the retransmit. In SYN_RCVD, we resend the
+ SYNACK that we sent earlier and in LAST_ACK we have to
+ retransmit our FINACK. */
UIP_STAT(++uip_stat.tcp.rexmit);
switch(uip_connr->tcpstateflags & UIP_TS_MASK) {
case UIP_SYN_RCVD:
@@ -921,14 +923,14 @@
uip_len = (BUF->len[0] << 8) + BUF->len[1];
#if UIP_CONF_IPV6
uip_len += 40; /* The length reported in the IPv6 header is the
- length of the payload that follows the
- header. However, uIP uses the uip_len variable
- for holding the size of the entire packet,
- including the IP header. For IPv4 this is not a
- problem as the length field in the IPv4 header
- contains the length of the entire packet. But
- for IPv6 we need to add the size of the IPv6
- header (40 bytes). */
+ length of the payload that follows the
+ header. However, uIP uses the uip_len variable
+ for holding the size of the entire packet,
+ including the IP header. For IPv4 this is not a
+ problem as the length field in the IPv4 header
+ contains the length of the entire packet. But
+ for IPv6 we need to add the size of the IPv6
+ header (40 bytes). */
#endif /* UIP_CONF_IPV6 */
}
else {
@@ -982,7 +984,7 @@
(
BUF->proto == UIP_PROTO_UDP
&& uip_ipaddr_cmp(BUF->destipaddr, all_ones_addr) /*&&
- uip_ipchksum() == 0xffff*/
+ uip_ipchksum() == 0xffff*/
) {
goto udp_input;
}
@@ -1014,7 +1016,7 @@
if(uip_ipchksum() != 0xffff) {
/* Compute and check the IP header
- checksum. */
+ checksum. */
UIP_STAT(++uip_stat.ip.drop);
UIP_STAT(++uip_stat.ip.chkerr);
UIP_LOG("ip: bad checksum.");
@@ -1025,8 +1027,8 @@
if(BUF->proto == UIP_PROTO_TCP) {
/* Check for TCP packet. If so,
- proceed with TCP input
- processing. */
+ proceed with TCP input
+ processing. */
goto tcp_input;
}
@@ -1042,7 +1044,7 @@
if(BUF->proto != UIP_PROTO_ICMP) {
/* We only allow ICMP packets from
- here. */
+ here. */
UIP_STAT(++uip_stat.ip.drop);
UIP_STAT(++uip_stat.ip.protoerr);
UIP_LOG("ip: neither tcp nor icmp.");
@@ -1100,7 +1102,7 @@
if(BUF->proto != UIP_PROTO_ICMP6) {
/* We only allow ICMPv6 packets from
- here. */
+ here. */
UIP_STAT(++uip_stat.ip.drop);
UIP_STAT(++uip_stat.ip.protoerr);
UIP_LOG("ip: neither tcp nor icmp6.");
@@ -1120,7 +1122,7 @@
}
/* We should now send a neighbor advertisement back to where the
- neighbor solicication came from. */
+ neighbor solicication came from. */
ICMPBUF->type = ICMP6_NEIGHBOR_ADVERTISEMENT;
ICMPBUF->flags = ICMP6_FLAG_S; /* Solicited flag. */
@@ -1274,7 +1276,7 @@
if(uip_tcpchksum() != 0xffff) {
/* Compute and check the TCP
- checksum. */
+ checksum. */
UIP_STAT(++uip_stat.tcp.drop);
UIP_STAT(++uip_stat.tcp.chkerr);
UIP_LOG("tcp: bad checksum.");
@@ -1452,11 +1454,11 @@
else {
/* All other options have a length field, so that we easily
- can skip past them. */
+ can skip past them. */
if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
/* If the length field is zero, the options are malformed
- and we don't process them further. */
+ and we don't process them further. */
break;
}
@@ -1582,9 +1584,9 @@
/* Do different things depending on in what state the connection is. */
switch(uip_connr->tcpstateflags & UIP_TS_MASK) {
/* CLOSED and LISTEN are not handled here. CLOSE_WAIT is not
- implemented, since we force the application to close when the
- peer sends a FIN (hence the application goes directly from
- ESTABLISHED to LAST_ACK). */
+ implemented, since we force the application to close when the
+ peer sends a FIN (hence the application goes directly from
+ ESTABLISHED to LAST_ACK). */
case UIP_SYN_RCVD:
/* In SYN_RCVD we have sent out a SYNACK in response to a SYN, and
we are waiting for an ACK that acknowledges the data we sent
@@ -1642,11 +1644,11 @@
else {
/* All other options have a length field, so that we easily
- can skip past them. */
+ can skip past them. */
if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) {
/* If the length field is zero, the options are malformed
- and we don't process them further. */
+ and we don't process them further. */
break;
}
@@ -1804,32 +1806,32 @@
if(uip_slen > 0) {
/* If the connection has acknowledged data, the contents of
- the ->len variable should be discarded. */
+ the ->len variable should be discarded. */
if((uip_flags & UIP_ACKDATA) != 0) {
uip_connr->len = 0;
}
/* If the ->len variable is non-zero the connection has
- already data in transit and cannot send anymore right
- now. */
+ already data in transit and cannot send anymore right
+ now. */
if(uip_connr->len == 0) {
/* The application cannot send more than what is allowed by
- the mss (the minumum of the MSS and the available
- window). */
+ the mss (the minumum of the MSS and the available
+ window). */
if(uip_slen > uip_connr->mss) {
uip_slen = uip_connr->mss;
}
/* Remember how much data we send out now so that we know
- when everything has been acknowledged. */
+ when everything has been acknowledged. */
uip_connr->len = uip_slen;
}
else {
/* If the application already had unacknowledged data, we
- make sure that the application does not send (i.e.,
- retransmit) out more than it previously sent out. */
+ make sure that the application does not send (i.e.,
+ retransmit) out more than it previously sent out. */
uip_slen = uip_connr->len;
}
}
@@ -1853,7 +1855,7 @@
}
/* If there is no data to send, just send out a pure ACK if
- there is newdata. */
+ there is newdata. */
if(uip_flags & UIP_NEWDATA) {
uip_len = UIP_TCPIP_HLEN;
BUF->flags = TCP_ACK;