Submitted by:	Hellmuth Michaelis <hm@kts.org>
add LCP/PAP/CHAP/IPCP frame printing functionality
This commit is contained in:
Peter Hawkins 1998-08-30 05:32:44 +00:00
parent 80c936833f
commit 3cf9b7ae04
Notes: svn2git 2020-12-20 02:59:44 +00:00
svn path=/head/; revision=38638

View File

@ -64,10 +64,6 @@ static struct protonames protonames[] = {
* Protocol field values.
*/
PPP_IP, "IP", /* Internet Protocol */
#ifndef PPP_ISO
#define PPP_ISO 0x23
#endif
PPP_ISO, "ISO", /* ISO 8473 */
PPP_XNS, "XNS", /* Xerox NS */
PPP_IPX, "IPX", /* IPX Datagram (RFC1552) */
PPP_VJC_COMP, "VJC_UNCOMP", /* VJ compressed TCP */
@ -82,24 +78,409 @@ static struct protonames protonames[] = {
PPP_CHAP, "CHAP", /* Cryptographic Handshake Auth. Proto*/
};
/* LCP */
#define LCP_CONF_REQ 1
#define LCP_CONF_ACK 2
#define LCP_CONF_NAK 3
#define LCP_CONF_REJ 4
#define LCP_TERM_REQ 5
#define LCP_TERM_ACK 6
#define LCP_CODE_REJ 7
#define LCP_PROT_REJ 8
#define LCP_ECHO_REQ 9
#define LCP_ECHO_RPL 10
#define LCP_DISC_REQ 11
#define LCP_MIN LCP_CONF_REQ
#define LCP_MAX LCP_DISC_REQ
static char *lcpcodes[] = {
/*
* LCP code values (RFC1661, pp26)
*/
"Configure-Request",
"Configure-Ack",
"Configure-Nak",
"Configure-Reject",
"Terminate-Request",
"Terminate-Ack",
"Code-Reject",
"Protocol-Reject",
"Echo-Request",
"Echo-Reply",
"Discard-Request",
};
#define LCPOPT_VEXT 0
#define LCPOPT_MRU 1
#define LCPOPT_ACCM 2
#define LCPOPT_AP 3
#define LCPOPT_QP 4
#define LCPOPT_MN 5
#define LCPOPT_PFC 7
#define LCPOPT_ACFC 8
#define LCPOPT_MIN 0
#define LCPOPT_MAX 24
static char *lcpconfopts[] = {
"Vendor-Ext",
"Max-Rx-Unit",
"Async-Ctrl-Char-Map",
"Auth-Prot",
"Quality-Prot",
"Magic-Number",
"unassigned (6)",
"Prot-Field-Compr",
"Add-Ctrl-Field-Compr",
"FCS-Alternatives",
"Self-Describing-Pad",
"Numbered-Mode",
"Multi-Link-Procedure",
"Call-Back",
"Connect-Time"
"Compund-Frames",
"Nominal-Data-Encap",
"Multilink-MRRU",
"Multilink-SSNHF",
"Multilink-ED",
"Proprietary",
"DCE-Identifier",
"Multilink-Plus-Proc",
"Link-Discriminator",
"LCP-Auth-Option",
};
/* CHAP */
#define CHAP_CHAL 1
#define CHAP_RESP 2
#define CHAP_SUCC 3
#define CHAP_FAIL 4
#define CHAP_CODEMIN 1
#define CHAP_CODEMAX 4
static char *chapcode[] = {
"Challenge",
"Response",
"Success",
"Failure",
};
/* PAP */
#define PAP_AREQ 1
#define PAP_AACK 2
#define PAP_ANAK 3
#define PAP_CODEMIN 1
#define PAP_CODEMAX 3
static char *papcode[] = {
"Authenticate-Request",
"Authenticate-Ack",
"Authenticate-Nak",
};
/* IPCP */
#define IPCP_2ADDR 1
#define IPCP_CP 2
#define IPCP_ADDR 3
static int handle_lcp(const u_char *p, int length);
static int print_lcp_config_options(u_char *p);
static int handle_chap(const u_char *p, int length);
static int handle_ipcp(const u_char *p, int length);
static int handle_pap(const u_char *p, int length);
void
ppp_hdlc_print(const u_char *p, int length)
{
int proto = PPP_PROTOCOL(p);
int i;
int i, j, x;
u_char *ptr;
printf("%4d %02x ", length, PPP_CONTROL(p));
for (i = (sizeof(protonames) / sizeof(protonames[0])) - 1; i >= 0; --i){
if (proto == protonames[i].protocol) {
printf("ID-%03d ", *(p+5));
for (i = (sizeof(protonames) / sizeof(protonames[0])) - 1; i >= 0; --i)
{
if (proto == protonames[i].protocol)
{
printf("%s: ", protonames[i].name);
switch(proto)
{
case PPP_LCP:
handle_lcp(p, length);
break;
case PPP_CHAP:
handle_chap(p, length);
break;
case PPP_PAP:
handle_pap(p, length);
break;
case PPP_IPCP:
handle_ipcp(p, length);
break;
}
break;
}
}
if (i < 0)
{
printf("%04x: ", proto);
}
}
/* print LCP frame */
static int
handle_lcp(const u_char *p, int length)
{
int x, j;
u_char *ptr;
x = *(p+4);
if((x >= LCP_MIN) && (x <= LCP_MAX))
{
printf("%s", lcpcodes[x-1]);
}
else
{
printf("0x%02x", x);
return;
}
length -= 4;
switch(x)
{
case LCP_CONF_REQ:
case LCP_CONF_ACK:
case LCP_CONF_NAK:
case LCP_CONF_REJ:
x = length;
ptr = (u_char *)p+8;
do
{
if((j = print_lcp_config_options(ptr)) == 0)
break;
x -= j;
ptr += j;
}
while(x > 0);
break;
case LCP_ECHO_REQ:
case LCP_ECHO_RPL:
printf(", Magic-Number=%d", ((*(p+8) << 24) + (*(p+9) << 16) + (*(p+10) << 8) + (*(p+11))));
break;
case LCP_TERM_REQ:
case LCP_TERM_ACK:
case LCP_CODE_REJ:
case LCP_PROT_REJ:
case LCP_DISC_REQ:
default:
break;
}
}
/* LCP config options */
static int
print_lcp_config_options(u_char *p)
{
int len = *(p+1);
int opt = *p;
if((opt >= LCPOPT_MIN) && (opt <= LCPOPT_MAX))
printf(", %s", lcpconfopts[opt]);
switch(opt)
{
case LCPOPT_MRU:
if(len == 4)
printf("=%d", (*(p+2) << 8) + *(p+3));
break;
case LCPOPT_AP:
if(len >= 4)
{
if(*(p+2) == 0xc0 && *(p+3) == 0x23)
{
printf(" PAP");
}
else if(*(p+2) == 0xc2 && *(p+3) == 0x23)
{
printf(" CHAP/");
switch(*(p+4))
{
default:
printf("unknown-algorithm-%d", *(p+4));
break;
case 5:
printf("MD5");
break;
case 0x80:
printf("Microsoft");
break;
}
}
else if(*(p+2) == 0xc2 && *(p+3) == 0x27)
{
printf(" EAP");
}
else if(*(p+2) == 0xc0 && *(p+3) == 0x27)
{
printf(" SPAP");
}
else if(*(p+2) == 0xc1 && *(p+3) == 0x23)
{
printf(" Old-SPAP");
}
else
{
printf("unknown");
}
}
break;
case LCPOPT_QP:
if(len >= 4)
{
if(*(p+2) == 0xc0 && *(p+3) == 0x25)
printf(" LQR");
else
printf(" unknown");
}
break;
case LCPOPT_MN:
if(len == 6)
{
printf("=%d", ((*(p+2) << 24) + (*(p+3) << 16) + (*(p+4) << 8) + (*(p+5))));
}
break;
case LCPOPT_PFC:
printf(" PFC");
break;
case LCPOPT_ACFC:
printf(" ACFC");
break;
}
return(len);
}
/* CHAP */
static int
handle_chap(const u_char *p, int length)
{
int x, j;
u_char *ptr;
x = *(p+4);
if((x >= CHAP_CODEMIN) && (x <= CHAP_CODEMAX))
{
printf("%s", chapcode[x-1]);
}
else
{
printf("0x%02x", x);
return;
}
length -= 4;
switch(x)
{
case CHAP_CHAL:
case CHAP_RESP:
printf(", Value=");
x = *(p+8); /* value size */
ptr = (u_char *)p+9;
while(--x >= 0)
printf("%02x", *ptr++);
x = length - *(p+8) - 1;
printf(", Name=");
while(--x >= 0)
printf("%c", *ptr++);
break;
}
}
/* PAP */
static int
handle_pap(const u_char *p, int length)
{
int x, j;
u_char *ptr;
x = *(p+4);
if((x >= PAP_CODEMIN) && (x <= PAP_CODEMAX))
{
printf("%s", papcode[x-1]);
}
else
{
printf("0x%02x", x);
return;
}
length -= 4;
switch(x)
{
case PAP_AREQ:
printf(", Peer-Id=");
x = *(p+8); /* peerid size */
ptr = (u_char *)p+9;
while(--x >= 0)
printf("%c", *ptr++);
x = *ptr++;
printf(", Passwd=");
while(--x >= 0)
printf("%c", *ptr++);
break;
case PAP_AACK:
case PAP_ANAK:
break;
}
}
/* IPCP */
static int
handle_ipcp(const u_char *p, int length)
{
int x, j;
x = *(p+8);
length -= 4;
switch(x)
{
case IPCP_2ADDR:
printf("IP-Addresses");
printf(", Src=%d.%d.%d.%d", *(p+10), *(p+11), *(p+12), *(p+13));
printf(", Dst=%d.%d.%d.%d", *(p+14), *(p+15), *(p+16), *(p+17));
break;
case IPCP_CP:
printf("IP-Compression-Protocol");
break;
case IPCP_ADDR:
printf("IP-Address=%d.%d.%d.%d", *(p+10), *(p+11), *(p+12), *(p+13));
break;
}
}
void
ppp_if_print(u_char *user, const struct pcap_pkthdr *h,
register const u_char *p)
@ -107,24 +488,6 @@ ppp_if_print(u_char *user, const struct pcap_pkthdr *h,
register u_int length = h->len;
register u_int caplen = h->caplen;
int frame_relay = 0;
int proto = PPP_CONTROL(p);
if(caplen > length) caplen = length;
/*
* Check to see if this is a frame-relay, we have to do this
* because BPF could not differentiate between PPP and Framerelay
* link types.
*/
frame_relay = (fr_addr_len(p) >= 2);
if(frame_relay) {
fr_if_print(user, h, p);
return;
}
ts_print(&h->ts);
if (caplen < PPP_HDRLEN) {
@ -154,18 +517,10 @@ ppp_if_print(u_char *user, const struct pcap_pkthdr *h,
case ETHERTYPE_IPX:
ipx_print((const u_char *)(p + PPP_HDRLEN), length);
break;
case PPP_ISO:
isoclns_print((const u_char *)(p + PPP_HDRLEN), length,
caplen, "000000", "000000");
break;
default:
if(!eflag) {
if (frame_relay)
fr_hdlc_print(p, length);
else
ppp_hdlc_print(p, length);
}
if(!eflag)
ppp_hdlc_print(p, length);
if(!xflag)
default_print((const u_char *)(p + PPP_HDRLEN),
caplen - PPP_HDRLEN);