mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-18 20:24:02 +02:00
641c4de73d
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15958 3c298f89-4303-0410-b956-a3cf2f4a3e73
173 lines
5.0 KiB
Diff
173 lines
5.0 KiB
Diff
--- a/pppd/demand.c
|
|
+++ b/pppd/demand.c
|
|
@@ -36,6 +36,8 @@
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <netdb.h>
|
|
+#include <unistd.h>
|
|
+#include <syslog.h>
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
@@ -43,6 +45,8 @@
|
|
#include <sys/resource.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/socket.h>
|
|
+#include <netinet/in.h>
|
|
+#include <arpa/inet.h>
|
|
#ifdef PPP_FILTER
|
|
#include <pcap-bpf.h>
|
|
#endif
|
|
@@ -221,6 +225,14 @@ loop_chars(p, n)
|
|
int c, rv;
|
|
|
|
rv = 0;
|
|
+
|
|
+/* check for synchronous connection... */
|
|
+
|
|
+ if ( (p[0] == 0xFF) && (p[1] == 0x03) ) {
|
|
+ rv = loop_frame(p,n);
|
|
+ return rv;
|
|
+ }
|
|
+
|
|
for (; n > 0; --n) {
|
|
c = *p++;
|
|
if (c == PPP_FLAG) {
|
|
@@ -299,17 +311,102 @@ loop_frame(frame, len)
|
|
* loopback, now that the real serial link is up.
|
|
*/
|
|
void
|
|
-demand_rexmit(proto)
|
|
+demand_rexmit(proto, newip)
|
|
int proto;
|
|
+ u_int32_t newip;
|
|
{
|
|
struct packet *pkt, *prev, *nextpkt;
|
|
+ unsigned short checksum;
|
|
+ unsigned short pkt_checksum = 0;
|
|
+ unsigned iphdr;
|
|
+ struct timeval tv;
|
|
+ char cv = 0;
|
|
+ char ipstr[16];
|
|
|
|
prev = NULL;
|
|
pkt = pend_q;
|
|
pend_q = NULL;
|
|
+ tv.tv_sec = 1;
|
|
+ tv.tv_usec = 0;
|
|
+ select(0,NULL,NULL,NULL,&tv); /* Sleep for 1 Seconds */
|
|
for (; pkt != NULL; pkt = nextpkt) {
|
|
nextpkt = pkt->next;
|
|
if (PPP_PROTOCOL(pkt->data) == proto) {
|
|
+ if ( (proto == PPP_IP) && newip ) {
|
|
+ /* Get old checksum */
|
|
+
|
|
+ iphdr = (pkt->data[4] & 15) << 2;
|
|
+ checksum = *((unsigned short *) (pkt->data+14));
|
|
+ if (checksum == 0xFFFF) {
|
|
+ checksum = 0;
|
|
+ }
|
|
+
|
|
+
|
|
+ if (pkt->data[13] == 17) {
|
|
+ pkt_checksum = *((unsigned short *) (pkt->data+10+iphdr));
|
|
+ if (pkt_checksum) {
|
|
+ cv = 1;
|
|
+ if (pkt_checksum == 0xFFFF) {
|
|
+ pkt_checksum = 0;
|
|
+ }
|
|
+ }
|
|
+ else {
|
|
+ cv = 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (pkt->data[13] == 6) {
|
|
+ pkt_checksum = *((unsigned short *) (pkt->data+20+iphdr));
|
|
+ cv = 1;
|
|
+ if (pkt_checksum == 0xFFFF) {
|
|
+ pkt_checksum = 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Delete old Source-IP-Address */
|
|
+ checksum -= *((unsigned short *) (pkt->data+16)) ^ 0xFFFF;
|
|
+ checksum -= *((unsigned short *) (pkt->data+18)) ^ 0xFFFF;
|
|
+
|
|
+ pkt_checksum -= *((unsigned short *) (pkt->data+16)) ^ 0xFFFF;
|
|
+ pkt_checksum -= *((unsigned short *) (pkt->data+18)) ^ 0xFFFF;
|
|
+
|
|
+ /* Change Source-IP-Address */
|
|
+ * ((u_int32_t *) (pkt->data + 16)) = newip;
|
|
+
|
|
+ /* Add new Source-IP-Address */
|
|
+ checksum += *((unsigned short *) (pkt->data+16)) ^ 0xFFFF;
|
|
+ checksum += *((unsigned short *) (pkt->data+18)) ^ 0xFFFF;
|
|
+
|
|
+ pkt_checksum += *((unsigned short *) (pkt->data+16)) ^ 0xFFFF;
|
|
+ pkt_checksum += *((unsigned short *) (pkt->data+18)) ^ 0xFFFF;
|
|
+
|
|
+ /* Write new checksum */
|
|
+ if (!checksum) {
|
|
+ checksum = 0xFFFF;
|
|
+ }
|
|
+ *((unsigned short *) (pkt->data+14)) = checksum;
|
|
+ if (pkt->data[13] == 6) {
|
|
+ *((unsigned short *) (pkt->data+20+iphdr)) = pkt_checksum;
|
|
+ }
|
|
+ if (cv && (pkt->data[13] == 17) ) {
|
|
+ *((unsigned short *) (pkt->data+10+iphdr)) = pkt_checksum;
|
|
+ }
|
|
+
|
|
+ /* Log Packet */
|
|
+ strcpy(ipstr,inet_ntoa(*( (struct in_addr *) (pkt->data+16))));
|
|
+ if (pkt->data[13] == 1) {
|
|
+ syslog(LOG_INFO,"Open ICMP %s -> %s\n",
|
|
+ ipstr,
|
|
+ inet_ntoa(*( (struct in_addr *) (pkt->data+20))));
|
|
+ } else {
|
|
+ syslog(LOG_INFO,"Open %s %s:%d -> %s:%d\n",
|
|
+ pkt->data[13] == 6 ? "TCP" : "UDP",
|
|
+ ipstr,
|
|
+ ntohs(*( (short *) (pkt->data+iphdr+4))),
|
|
+ inet_ntoa(*( (struct in_addr *) (pkt->data+20))),
|
|
+ ntohs(*( (short *) (pkt->data+iphdr+6))));
|
|
+ }
|
|
+ }
|
|
output(0, pkt->data, pkt->length);
|
|
free(pkt);
|
|
} else {
|
|
--- a/pppd/ipcp.c
|
|
+++ b/pppd/ipcp.c
|
|
@@ -1776,7 +1776,7 @@ ipcp_up(f)
|
|
proxy_arp_set[f->unit] = 1;
|
|
|
|
}
|
|
- demand_rexmit(PPP_IP);
|
|
+ demand_rexmit(PPP_IP,go->ouraddr);
|
|
sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
|
|
|
|
} else {
|
|
--- a/pppd/ipv6cp.c
|
|
+++ b/pppd/ipv6cp.c
|
|
@@ -1232,7 +1232,7 @@ ipv6cp_up(f)
|
|
}
|
|
|
|
}
|
|
- demand_rexmit(PPP_IPV6);
|
|
+ demand_rexmit(PPP_IPV6,0);
|
|
sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS);
|
|
|
|
} else {
|
|
--- a/pppd/pppd.h
|
|
+++ b/pppd/pppd.h
|
|
@@ -565,7 +565,7 @@ void demand_conf __P((void)); /* config
|
|
void demand_block __P((void)); /* set all NPs to queue up packets */
|
|
void demand_unblock __P((void)); /* set all NPs to pass packets */
|
|
void demand_discard __P((void)); /* set all NPs to discard packets */
|
|
-void demand_rexmit __P((int)); /* retransmit saved frames for an NP */
|
|
+void demand_rexmit __P((int, u_int32_t)); /* retransmit saved frames for an NP*/
|
|
int loop_chars __P((unsigned char *, int)); /* process chars from loopback */
|
|
int loop_frame __P((unsigned char *, int)); /* should we bring link up? */
|
|
|