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fixed extension header handling

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This commit is contained in:
Joakim Eriksson 2012-01-27 15:40:39 +01:00
parent a7e4fa3436
commit c3655728b8
2 changed files with 31 additions and 34 deletions
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5
core/net/uip.h
View file

@ -1912,13 +1912,8 @@ struct uip_udp_hdr {
*/
#define uip_l2_l3_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len)
#define uip_l2_l3_icmp_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN)
#define uip_l2_l3_udp_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len + UIP_UDPH_LEN)
#define uip_l2_l3_tcp_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len + UIP_TCPH_LEN)
#define uip_l3_hdr_len (UIP_IPH_LEN + uip_ext_len)
#define uip_l3_icmp_hdr_len (UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN)
#define uip_l3_udp_hdr_len (UIP_IPH_LEN + uip_ext_len + UIP_UDPH_LEN)
#define uip_l3_tcp_hdr_len (UIP_IPH_LEN + uip_ext_len + UIP_TCPH_LEN)
#endif /*UIP_CONF_IPV6*/

60
core/net/uip6.c
View file

@ -154,8 +154,8 @@ u8_t uip_ext_opt_offset = 0;
#define FBUF ((struct uip_tcpip_hdr *)&uip_reassbuf[0])
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
#define UIP_ICMP_BUF ((struct uip_icmp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
#define UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
#define UIP_TCP_BUF ((struct uip_tcp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
#define UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[UIP_LLH_LEN + UIP_IPH_LEN])
#define UIP_TCP_BUF ((struct uip_tcp_hdr *)&uip_buf[UIP_LLH_LEN + UIP_IPH_LEN])
#define UIP_EXT_BUF ((struct uip_ext_hdr *)&uip_buf[uip_l2_l3_hdr_len])
#define UIP_ROUTING_BUF ((struct uip_routing_hdr *)&uip_buf[uip_l2_l3_hdr_len])
#define UIP_FRAG_BUF ((struct uip_frag_hdr *)&uip_buf[uip_l2_l3_hdr_len])
@ -370,7 +370,10 @@ upper_layer_chksum(u8_t proto)
volatile u16_t upper_layer_len;
u16_t sum;
upper_layer_len = (((u16_t)(UIP_IP_BUF->len[0]) << 8) + UIP_IP_BUF->len[1] - uip_ext_len) ;
upper_layer_len = (((u16_t)(UIP_IP_BUF->len[0]) << 8) + UIP_IP_BUF->len[1] - uip_ext_len);
PRINTF("Upper layer checksum len: %d from: %d\n", upper_layer_len,
UIP_IPH_LEN + UIP_LLH_LEN + uip_ext_len);
/* First sum pseudoheader. */
/* IP protocol and length fields. This addition cannot carry. */
@ -511,15 +514,15 @@ remove_ext_hdr(void)
{
/* Remove ext header before TCP/UDP processing. */
if(uip_ext_len > 0) {
PRINTF("Cutting ext-header before TCP send (extlen: %d, uiplen: %d)\n",
PRINTF("Cutting ext-header before processing (extlen: %d, uiplen: %d)\n",
uip_ext_len, uip_len);
if(uip_len - UIP_IPH_LEN- uip_ext_len < 0) {
if(uip_len - UIP_IPH_LEN - uip_ext_len < 0) {
PRINTF("ERROR: uip_len too short compared to ext len\n");
uip_ext_len = 0;
uip_len = 0;
return;
}
memmove(((uint8_t *)UIP_TCP_BUF) - uip_ext_len, (uint8_t *)UIP_TCP_BUF,
memmove(((uint8_t *)UIP_TCP_BUF), (uint8_t *)UIP_TCP_BUF + uip_ext_len,
uip_len - UIP_IPH_LEN - uip_ext_len);
uip_len -= uip_ext_len;
@ -1053,7 +1056,7 @@ uip_process(u8_t flag)
if(flag == UIP_UDP_TIMER) {
if(uip_udp_conn->lport != 0) {
uip_conn = NULL;
uip_sappdata = uip_appdata = &uip_buf[uip_l2_l3_udp_hdr_len];
uip_sappdata = uip_appdata = &uip_buf[UIP_IPUDPH_LEN];
uip_len = uip_slen = 0;
uip_flags = UIP_POLL;
UIP_UDP_APPCALL();
@ -1451,17 +1454,17 @@ uip_process(u8_t flag)
work. If the application sets uip_slen, it has a packet to
send. */
#if UIP_UDP_CHECKSUMS
uip_len = uip_len - uip_l3_udp_hdr_len;
uip_appdata = &uip_buf[uip_l2_l3_udp_hdr_len];
uip_len = uip_len - UIP_IPUDPH_LEN;
uip_appdata = &uip_buf[UIP_IPUDPH_LEN];
if(UIP_UDP_BUF->udpchksum != 0 && uip_udpchksum() != 0xffff) {
UIP_STAT(++uip_stat.udp.drop);
UIP_STAT(++uip_stat.udp.chkerr);
PRINTF("udp: bad checksum 0x%04x 0x%04x\n", UIP_UDP_BUF->udpchksum,
printf("udp: bad checksum 0x%04x 0x%04x\n", UIP_UDP_BUF->udpchksum,
uip_udpchksum());
goto drop;
}
#else /* UIP_UDP_CHECKSUMS */
uip_len = uip_len - uip_l3_udp_hdr_len;
uip_len = uip_len - UIP_IPUDPH_LEN;
#endif /* UIP_UDP_CHECKSUMS */
/* Make sure that the UDP destination port number is not zero. */
@ -1505,7 +1508,7 @@ uip_process(u8_t flag)
uip_conn = NULL;
uip_flags = UIP_NEWDATA;
uip_sappdata = uip_appdata = &uip_buf[uip_l2_l3_udp_hdr_len];
uip_sappdata = uip_appdata = &uip_buf[UIP_IPUDPH_LEN];
uip_slen = 0;
UIP_UDP_APPCALL();
@ -1515,8 +1518,7 @@ uip_process(u8_t flag)
if(uip_slen == 0) {
goto drop;
}
/* TODO: ext_header len here ? */
uip_len = uip_slen + uip_l3_udp_hdr_len; /* UIP_IPUDPH_LEN; */
uip_len = uip_slen + UIP_IPUDPH_LEN;
/* For IPv6, the IP length field does not include the IPv6 IP header
length. */
@ -1717,7 +1719,7 @@ uip_process(u8_t flag)
/* Parse the TCP MSS option, if present. */
if((UIP_TCP_BUF->tcpoffset & 0xf0) > 0x50) {
for(c = 0; c < ((UIP_TCP_BUF->tcpoffset >> 4) - 5) << 2 ;) {
opt = uip_buf[UIP_TCPIP_HLEN + uip_ext_len + UIP_LLH_LEN + c];
opt = uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + c];
if(opt == TCP_OPT_END) {
/* End of options. */
break;
@ -1725,10 +1727,10 @@ uip_process(u8_t flag)
++c;
/* NOP option. */
} else if(opt == TCP_OPT_MSS &&
uip_buf[UIP_TCPIP_HLEN + uip_ext_len + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) {
uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) {
/* An MSS option with the right option length. */
tmp16 = ((u16_t)uip_buf[UIP_TCPIP_HLEN + uip_ext_len + UIP_LLH_LEN + 2 + c] << 8) |
(u16_t)uip_buf[UIP_IPTCPH_LEN + uip_ext_len + UIP_LLH_LEN + 3 + c];
tmp16 = ((u16_t)uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
(u16_t)uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + 3 + c];
uip_connr->initialmss = uip_connr->mss =
tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
@ -1737,12 +1739,12 @@ uip_process(u8_t flag)
} else {
/* All other options have a length field, so that we easily
can skip past them. */
if(uip_buf[UIP_TCPIP_HLEN + uip_ext_len + UIP_LLH_LEN + 1 + c] == 0) {
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. */
break;
}
c += uip_buf[UIP_TCPIP_HLEN + uip_ext_len + UIP_LLH_LEN + 1 + c];
c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
}
}
}
@ -1765,7 +1767,7 @@ uip_process(u8_t flag)
UIP_TCP_BUF->optdata[1] = TCP_OPT_MSS_LEN;
UIP_TCP_BUF->optdata[2] = (UIP_TCP_MSS) / 256;
UIP_TCP_BUF->optdata[3] = (UIP_TCP_MSS) & 255;
uip_len = UIP_IPTCPH_LEN + TCP_OPT_MSS_LEN + uip_ext_len;
uip_len = UIP_IPTCPH_LEN + TCP_OPT_MSS_LEN;
UIP_TCP_BUF->tcpoffset = ((UIP_TCPH_LEN + TCP_OPT_MSS_LEN) / 4) << 4;
goto tcp_send;
@ -1791,7 +1793,7 @@ uip_process(u8_t flag)
/* uip_len will contain the length of the actual TCP data. This is
calculated by subtracing the length of the TCP header (in
c) and the length of the IP header (20 bytes). */
uip_len = uip_len - c - UIP_IPH_LEN - uip_ext_len;
uip_len = uip_len - c - UIP_IPH_LEN;
/* First, check if the sequence number of the incoming packet is
what we're expecting next. If not, we send out an ACK with the
@ -1898,7 +1900,7 @@ uip_process(u8_t flag)
/* Parse the TCP MSS option, if present. */
if((UIP_TCP_BUF->tcpoffset & 0xf0) > 0x50) {
for(c = 0; c < ((UIP_TCP_BUF->tcpoffset >> 4) - 5) << 2 ;) {
opt = uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + c + uip_ext_len];
opt = uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + c];
if(opt == TCP_OPT_END) {
/* End of options. */
break;
@ -1906,10 +1908,10 @@ uip_process(u8_t flag)
++c;
/* NOP option. */
} else if(opt == TCP_OPT_MSS &&
uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c + uip_ext_len] == TCP_OPT_MSS_LEN) {
uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) {
/* An MSS option with the right option length. */
tmp16 = (uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c + uip_ext_len] << 8) |
uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 3 + c + uip_ext_len];
tmp16 = (uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) |
uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 3 + c];
uip_connr->initialmss =
uip_connr->mss = tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16;
@ -1918,12 +1920,12 @@ uip_process(u8_t flag)
} else {
/* All other options have a length field, so that we easily
can skip past them. */
if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c + uip_ext_len] == 0) {
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. */
break;
}
c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c + uip_ext_len];
c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c];
}
}
}
@ -2194,7 +2196,7 @@ uip_process(u8_t flag)
UIP_TCP_BUF->flags = TCP_ACK;
tcp_send_nodata:
uip_len = UIP_IPTCPH_LEN; /* TODO: maybe ext_len??? */
uip_len = UIP_IPTCPH_LEN;
tcp_send_noopts:
UIP_TCP_BUF->tcpoffset = (UIP_TCPH_LEN / 4) << 4;