diff options
Diffstat (limited to 'package/network/services/ppp/patches/105-debian_demand.patch')
| -rw-r--r-- | package/network/services/ppp/patches/105-debian_demand.patch | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/package/network/services/ppp/patches/105-debian_demand.patch b/package/network/services/ppp/patches/105-debian_demand.patch new file mode 100644 index 0000000..2502d49 --- /dev/null +++ b/package/network/services/ppp/patches/105-debian_demand.patch @@ -0,0 +1,172 @@ +--- 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 +@@ -1883,7 +1883,7 @@ 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 +@@ -585,7 +585,7 @@ 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? */ + |