u_int
juniper_services_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
struct juniper_services_header {
u_int8_t svc_id;
u_int8_t flags_len;
u_int8_t svc_set_id[2];
u_int8_t dir_iif[4];
};
const struct juniper_services_header *sh;
l2info.pictype = DLT_JUNIPER_SERVICES;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
sh = (struct juniper_services_header *)p;
if (eflag)
printf("service-id %u flags 0x%02x service-set-id 0x%04x iif %u: ",
sh->svc_id,
sh->flags_len,
EXTRACT_16BITS(&sh->svc_set_id),
EXTRACT_24BITS(&sh->dir_iif[1]));
ip_heuristic_guess(p, l2info.length);
return l2info.header_len;
}
u_int
juniper_services_print(const struct pcap_pkthdr *h, packetbody_t p)
{
struct juniper_l2info_t l2info;
struct juniper_services_header {
u_int8_t svc_id;
u_int8_t flags_len;
u_int8_t svc_set_id[2];
u_int8_t dir_iif[4];
};
__capability const struct juniper_services_header *sh;
l2info.pictype = DLT_JUNIPER_SERVICES;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
sh = (__capability const struct juniper_services_header *)p;
if (eflag)
printf("service-id %u flags 0x%02x service-set-id 0x%04x iif %u: ",
sh->svc_id,
sh->flags_len,
EXTRACT_16BITS(&sh->svc_set_id),
EXTRACT_24BITS(&sh->dir_iif[1]));
/* no proto field - lets guess by first byte of IP header*/
ip_heuristic_guess(p, l2info.length);
return l2info.header_len;
}
u_int
juniper_monitor_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
struct juniper_monitor_header {
u_int8_t pkt_type;
u_int8_t padding;
u_int8_t iif[2];
u_int8_t service_id[4];
};
const struct juniper_monitor_header *mh;
l2info.pictype = DLT_JUNIPER_MONITOR;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
mh = (struct juniper_monitor_header *)p;
if (eflag)
printf("service-id %u, iif %u, pkt-type %u: ",
EXTRACT_32BITS(&mh->service_id),
EXTRACT_16BITS(&mh->iif),
mh->pkt_type);
ip_heuristic_guess(p, l2info.length);
return l2info.header_len;
}
u_int
juniper_monitor_print(const struct pcap_pkthdr *h, packetbody_t p)
{
struct juniper_l2info_t l2info;
struct juniper_monitor_header {
u_int8_t pkt_type;
u_int8_t padding;
u_int8_t iif[2];
u_int8_t service_id[4];
};
__capability const struct juniper_monitor_header *mh;
l2info.pictype = DLT_JUNIPER_MONITOR;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
mh = (__capability const struct juniper_monitor_header *)p;
if (eflag)
printf("service-id %u, iif %u, pkt-type %u: ",
EXTRACT_32BITS(&mh->service_id),
EXTRACT_16BITS(&mh->iif),
mh->pkt_type);
/* no proto field - lets guess by first byte of IP header*/
ip_heuristic_guess(p, l2info.length);
return l2info.header_len;
}
u_int
juniper_services_print(netdissect_options *ndo,
const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
struct juniper_services_header {
uint8_t svc_id;
uint8_t flags_len;
uint8_t svc_set_id[2];
uint8_t dir_iif[4];
};
const struct juniper_services_header *sh;
l2info.pictype = DLT_JUNIPER_SERVICES;
if (juniper_parse_header(ndo, p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
sh = (struct juniper_services_header *)p;
if (ndo->ndo_eflag)
ND_PRINT((ndo, "service-id %u flags 0x%02x service-set-id 0x%04x iif %u: ",
sh->svc_id,
sh->flags_len,
EXTRACT_16BITS(&sh->svc_set_id),
EXTRACT_24BITS(&sh->dir_iif[1])));
/* no proto field - lets guess by first byte of IP header*/
ip_heuristic_guess (ndo, p, l2info.length);
return l2info.header_len;
}
u_int
juniper_monitor_print(netdissect_options *ndo,
const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
struct juniper_monitor_header {
uint8_t pkt_type;
uint8_t padding;
uint8_t iif[2];
uint8_t service_id[4];
};
const struct juniper_monitor_header *mh;
l2info.pictype = DLT_JUNIPER_MONITOR;
if (juniper_parse_header(ndo, p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
mh = (struct juniper_monitor_header *)p;
if (ndo->ndo_eflag)
ND_PRINT((ndo, "service-id %u, iif %u, pkt-type %u: ",
EXTRACT_32BITS(&mh->service_id),
EXTRACT_16BITS(&mh->iif),
mh->pkt_type));
/* no proto field - lets guess by first byte of IP header*/
ip_heuristic_guess (ndo, p, l2info.length);
return l2info.header_len;
}
u_int
juniper_atm2_print(netdissect_options *ndo,
const struct pcap_pkthdr *h, register const u_char *p)
{
uint16_t extracted_ethertype;
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_ATM2;
if (juniper_parse_header(ndo, p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
if (l2info.cookie[7] & ATM2_PKT_TYPE_MASK) { /* OAM cell ? */
oam_print(ndo, p, l2info.length, ATM_OAM_NOHEC);
return l2info.header_len;
}
if (EXTRACT_24BITS(p) == 0xfefe03 || /* NLPID encaps ? */
EXTRACT_24BITS(p) == 0xaaaa03) { /* SNAP encaps ? */
if (llc_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL,
&extracted_ethertype) != 0)
return l2info.header_len;
}
if (l2info.direction != JUNIPER_BPF_PKT_IN && /* ether-over-1483 encaps ? */
(EXTRACT_32BITS(l2info.cookie) & ATM2_GAP_COUNT_MASK)) {
ether_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
return l2info.header_len;
}
if (p[0] == 0x03) { /* Cisco style NLPID encaps ? */
isoclns_print(ndo, p + 1, l2info.length - 1, l2info.caplen - 1);
/* FIXME check if frame was recognized */
return l2info.header_len;
}
if(juniper_ppp_heuristic_guess(ndo, p, l2info.length) != 0) /* PPPoA vcmux encaps ? */
return l2info.header_len;
if (ip_heuristic_guess(ndo, p, l2info.length) != 0) /* last try - vcmux encaps ? */
return l2info.header_len;
return l2info.header_len;
}
u_int
juniper_atm2_print(const struct pcap_pkthdr *h, register const u_char *p)
{
u_int16_t extracted_ethertype;
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_ATM2;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
if (l2info.cookie[7] & ATM2_PKT_TYPE_MASK) {
oam_print(p,l2info.length,ATM_OAM_NOHEC);
return l2info.header_len;
}
if (EXTRACT_24BITS(p) == 0xfefe03 ||
EXTRACT_24BITS(p) == 0xaaaa03) {
if (llc_print(p, l2info.length, l2info.caplen, NULL, NULL,
&extracted_ethertype) != 0)
return l2info.header_len;
}
if (l2info.direction != JUNIPER_BPF_PKT_IN &&
(EXTRACT_32BITS(l2info.cookie) & ATM2_GAP_COUNT_MASK)) {
ether_print(p, l2info.length, l2info.caplen);
return l2info.header_len;
}
if (p[0] == 0x03) {
isoclns_print(p + 1, l2info.length - 1, l2info.caplen - 1);
return l2info.header_len;
}
if(juniper_ppp_heuristic_guess(p, l2info.length) != 0)
return l2info.header_len;
if(ip_heuristic_guess(p, l2info.length) != 0)
return l2info.header_len;
return l2info.header_len;
}
u_int
juniper_atm1_print(const struct pcap_pkthdr *h, register const u_char *p)
{
u_int16_t extracted_ethertype;
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_ATM1;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
if (l2info.cookie[0] == 0x80) {
oam_print(p,l2info.length,ATM_OAM_NOHEC);
return l2info.header_len;
}
if (EXTRACT_24BITS(p) == 0xfefe03 ||
EXTRACT_24BITS(p) == 0xaaaa03) {
if (llc_print(p, l2info.length, l2info.caplen, NULL, NULL,
&extracted_ethertype) != 0)
return l2info.header_len;
}
if (p[0] == 0x03) {
isoclns_print(p + 1, l2info.length - 1, l2info.caplen - 1);
return l2info.header_len;
}
if(ip_heuristic_guess(p, l2info.length) != 0)
return l2info.header_len;
return l2info.header_len;
}
u_int
juniper_atm1_print(const struct pcap_pkthdr *h, register const u_char *p)
{
u_int16_t extracted_ethertype;
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_ATM1;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
if (l2info.cookie[0] == 0x80) { /* OAM cell ? */
oam_print(p,l2info.length,ATM_OAM_NOHEC);
return l2info.header_len;
}
if (EXTRACT_24BITS(p) == 0xfefe03 || /* NLPID encaps ? */
EXTRACT_24BITS(p) == 0xaaaa03) { /* SNAP encaps ? */
if (llc_print(p, l2info.length, l2info.caplen, NULL, NULL,
&extracted_ethertype) != 0)
return l2info.header_len;
}
if (p[0] == 0x03) { /* Cisco style NLPID encaps ? */
isoclns_print(p + 1, l2info.length - 1, l2info.caplen - 1);
/* FIXME check if frame was recognized */
return l2info.header_len;
}
if(ip_heuristic_guess(p, l2info.length) != 0) /* last try - vcmux encaps ? */
return l2info.header_len;
return l2info.header_len;
}
static int
juniper_parse_header (const u_char *p, const struct pcap_pkthdr *h, struct juniper_l2info_t *l2info) {
struct juniper_cookie_table_t *lp = juniper_cookie_table;
u_int idx, offset;
#ifdef DLT_JUNIPER_ATM2
u_int32_t control_word;
#endif
l2info->header_len = 0;
l2info->cookie_len = 0;
l2info->proto = 0;
l2info->length = h->len;
l2info->caplen = h->caplen;
l2info->direction = p[3]&JUNIPER_BPF_PKT_IN;
TCHECK2(p[0],4);
if (EXTRACT_24BITS(p) != JUNIPER_MGC_NUMBER) {
printf("no magic-number found!");
return 0;
}
if (eflag)
printf("%3s ",tok2str(juniper_direction_values,"---",l2info->direction));
if ((p[3] & JUNIPER_BPF_EXT ) == JUNIPER_BPF_EXT ) {
offset = 6 + EXTRACT_16BITS(p+4);
if (eflag>1)
printf("ext-len %u, ",EXTRACT_16BITS(p+4));
} else
offset = 4;
if ((p[3] & JUNIPER_BPF_NO_L2 ) == JUNIPER_BPF_NO_L2 ) {
if (eflag)
printf("no-L2-hdr, ");
TCHECK2(p[offset+4],1);
if(ip_heuristic_guess(p+offset+4,l2info->length-(offset+4)) == 0)
printf("no IP-hdr found!");
l2info->header_len=offset+4;
return 0;
}
l2info->header_len = offset;
p+=l2info->header_len;
l2info->length -= l2info->header_len;
l2info->caplen -= l2info->header_len;
while (lp->s != NULL) {
if (lp->pictype == l2info->pictype) {
l2info->cookie_len += lp->cookie_len;
switch (p[0]) {
case LS_COOKIE_ID:
l2info->cookie_type = LS_COOKIE_ID;
l2info->cookie_len += 2;
break;
case AS_COOKIE_ID:
l2info->cookie_type = AS_COOKIE_ID;
l2info->cookie_len = 8;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
#ifdef DLT_JUNIPER_MFR
if (l2info->pictype == DLT_JUNIPER_MFR &&
(p[0] & MFR_BE_MASK) == MFR_BE_MASK) {
l2info->cookie_len = 0;
}
#endif
l2info->header_len += l2info->cookie_len;
l2info->length -= l2info->cookie_len;
l2info->caplen -= l2info->cookie_len;
if (eflag)
printf("%s-PIC, cookie-len %u",
lp->s,
l2info->cookie_len);
if (l2info->cookie_len > 0) {
TCHECK2(p[0],l2info->cookie_len);
if (eflag)
printf(", cookie 0x");
for (idx = 0; idx < l2info->cookie_len; idx++) {
l2info->cookie[idx] = p[idx];
if (eflag) printf("%02x",p[idx]);
}
}
if (eflag) printf(": ");
l2info->proto = EXTRACT_16BITS(p+l2info->cookie_len);
break;
}
++lp;
}
p+=l2info->cookie_len;
switch(l2info->pictype) {
#ifdef DLT_JUNIPER_MLPPP
case DLT_JUNIPER_MLPPP:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
break;
#endif
#ifdef DLT_JUNIPER_MLFR
case DLT_JUNIPER_MLFR:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
l2info->proto = EXTRACT_16BITS(p);
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
}
break;
#endif
#ifdef DLT_JUNIPER_MFR
case DLT_JUNIPER_MFR:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
l2info->proto = EXTRACT_16BITS(p);
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
break;
#endif
#ifdef DLT_JUNIPER_ATM2
case DLT_JUNIPER_ATM2:
TCHECK2(p[0],4);
if (l2info->cookie[7] & ATM2_PKT_TYPE_MASK) {
control_word = EXTRACT_32BITS(p);
switch(control_word) {
case 0:
case 0x08000000:
case 0x08380000:
l2info->header_len += 4;
break;
default:
break;
}
if (eflag)
printf("control-word 0x%08x ", control_word);
}
break;
#endif
#ifdef DLT_JUNIPER_ATM1
case DLT_JUNIPER_ATM1:
break;
#endif
#ifdef DLT_JUNIPER_PPP
case DLT_JUNIPER_PPP:
break;
#endif
#ifdef DLT_JUNIPER_CHDLC
case DLT_JUNIPER_CHDLC:
break;
#endif
#ifdef DLT_JUNIPER_ETHER
case DLT_JUNIPER_ETHER:
break;
#endif
#ifdef DLT_JUNIPER_FRELAY
case DLT_JUNIPER_FRELAY:
break;
#endif
default:
printf("Unknown Juniper DLT_ type %u: ", l2info->pictype);
break;
}
if (eflag > 1)
printf("hlen %u, proto 0x%04x, ",l2info->header_len,l2info->proto);
return 1;
trunc:
printf("[|juniper_hdr], length %u",h->len);
return 0;
}
static int
juniper_parse_header (const u_char *p, const struct pcap_pkthdr *h, struct juniper_l2info_t *l2info) {
struct juniper_cookie_table_t *lp = juniper_cookie_table;
u_int idx, offset;
#ifdef DLT_JUNIPER_ATM2
u_int32_t control_word;
#endif
l2info->header_len = 0;
l2info->cookie_len = 0;
l2info->proto = 0;
l2info->length = h->len;
l2info->caplen = h->caplen;
l2info->direction = p[3]&JUNIPER_BPF_PKT_IN;
TCHECK2(p[0],4);
if (EXTRACT_24BITS(p) != JUNIPER_MGC_NUMBER) { /* magic number found ? */
printf("no magic-number found!");
return 0;
}
if (eflag) /* print direction */
printf("%3s ",tok2str(juniper_direction_values,"---",l2info->direction));
/* extensions present ? - calculate how much bytes to skip */
if ((p[3] & JUNIPER_BPF_EXT ) == JUNIPER_BPF_EXT ) {
offset = 6 + EXTRACT_16BITS(p+4);
if (eflag>1)
printf("ext-len %u, ",EXTRACT_16BITS(p+4));
} else
offset = 4;
if ((p[3] & JUNIPER_BPF_NO_L2 ) == JUNIPER_BPF_NO_L2 ) {
if (eflag)
printf("no-L2-hdr, ");
/* there is no link-layer present -
* perform the v4/v6 heuristics
* to figure out what it is
*/
TCHECK2(p[offset+4],1);
if(ip_heuristic_guess(p+offset+4,l2info->length-(offset+4)) == 0)
printf("no IP-hdr found!");
l2info->header_len=offset+4;
return 0; /* stop parsing the output further */
}
l2info->header_len = offset;
p+=l2info->header_len;
l2info->length -= l2info->header_len;
l2info->caplen -= l2info->header_len;
/* search through the cookie table and copy values matching for our PIC type */
while (lp->s != NULL) {
if (lp->pictype == l2info->pictype) {
l2info->cookie_len += lp->cookie_len;
switch (p[0]) {
case LS_COOKIE_ID:
l2info->cookie_type = LS_COOKIE_ID;
l2info->cookie_len += 2;
break;
case AS_COOKIE_ID:
l2info->cookie_type = AS_COOKIE_ID;
l2info->cookie_len = 8;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
#ifdef DLT_JUNIPER_MFR
/* MFR child links don't carry cookies */
if (l2info->pictype == DLT_JUNIPER_MFR &&
(p[0] & MFR_BE_MASK) == MFR_BE_MASK) {
l2info->cookie_len = 0;
}
#endif
l2info->header_len += l2info->cookie_len;
l2info->length -= l2info->cookie_len;
l2info->caplen -= l2info->cookie_len;
if (eflag)
printf("%s-PIC, cookie-len %u",
lp->s,
l2info->cookie_len);
if (l2info->cookie_len > 0) {
TCHECK2(p[0],l2info->cookie_len);
if (eflag)
printf(", cookie 0x");
for (idx = 0; idx < l2info->cookie_len; idx++) {
l2info->cookie[idx] = p[idx]; /* copy cookie data */
if (eflag) printf("%02x",p[idx]);
}
}
if (eflag) printf(": "); /* print demarc b/w L2/L3*/
l2info->proto = EXTRACT_16BITS(p+l2info->cookie_len);
break;
}
++lp;
}
p+=l2info->cookie_len;
/* DLT_ specific parsing */
switch(l2info->pictype) {
#ifdef DLT_JUNIPER_MLPPP
case DLT_JUNIPER_MLPPP:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
break;
#endif
#ifdef DLT_JUNIPER_MLFR
case DLT_JUNIPER_MLFR:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
l2info->proto = EXTRACT_16BITS(p);
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
}
break;
#endif
#ifdef DLT_JUNIPER_MFR
case DLT_JUNIPER_MFR:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
l2info->proto = EXTRACT_16BITS(p);
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
break;
#endif
#ifdef DLT_JUNIPER_ATM2
case DLT_JUNIPER_ATM2:
TCHECK2(p[0],4);
/* ATM cell relay control word present ? */
if (l2info->cookie[7] & ATM2_PKT_TYPE_MASK) {
control_word = EXTRACT_32BITS(p);
/* some control word heuristics */
switch(control_word) {
case 0: /* zero control word */
case 0x08000000: /* < JUNOS 7.4 control-word */
case 0x08380000: /* cntl word plus cell length (56) >= JUNOS 7.4*/
l2info->header_len += 4;
break;
default:
break;
}
if (eflag)
printf("control-word 0x%08x ", control_word);
}
break;
#endif
#ifdef DLT_JUNIPER_ATM1
case DLT_JUNIPER_ATM1:
break;
#endif
#ifdef DLT_JUNIPER_PPP
case DLT_JUNIPER_PPP:
break;
#endif
#ifdef DLT_JUNIPER_CHDLC
case DLT_JUNIPER_CHDLC:
break;
#endif
#ifdef DLT_JUNIPER_ETHER
case DLT_JUNIPER_ETHER:
break;
#endif
#ifdef DLT_JUNIPER_FRELAY
case DLT_JUNIPER_FRELAY:
break;
#endif
default:
printf("Unknown Juniper DLT_ type %u: ", l2info->pictype);
break;
}
if (eflag > 1)
printf("hlen %u, proto 0x%04x, ",l2info->header_len,l2info->proto);
return 1; /* everything went ok so far. continue parsing */
trunc:
printf("[|juniper_hdr], length %u",h->len);
return 0;
}
static int
juniper_parse_header (packetbody_t p, const struct pcap_pkthdr *h, struct juniper_l2info_t *l2info) {
struct juniper_cookie_table_t *lp = juniper_cookie_table;
u_int idx, jnx_ext_len, jnx_header_len = 0;
u_int8_t tlv_type,tlv_len;
u_int32_t control_word;
int tlv_value;
packetbody_t tptr;
l2info->header_len = 0;
l2info->cookie_len = 0;
l2info->proto = 0;
l2info->length = h->len;
l2info->caplen = h->caplen;
PACKET_HAS_SPACE_OR_TRUNC(p,4);
l2info->flags = p[3];
l2info->direction = p[3]&JUNIPER_BPF_PKT_IN;
if (EXTRACT_24BITS(p) != JUNIPER_MGC_NUMBER) { /* magic number found ? */
printf("no magic-number found!");
return 0;
}
if (eflag) /* print direction */
printf("%3s ",tok2str(juniper_direction_values,"---",l2info->direction));
/* magic number + flags */
jnx_header_len = 4;
if (vflag>1)
printf("\n\tJuniper PCAP Flags [%s]",
bittok2str(jnx_flag_values, "none", l2info->flags));
/* extensions present ? - calculate how much bytes to skip */
if ((l2info->flags & JUNIPER_BPF_EXT ) == JUNIPER_BPF_EXT ) {
tptr = p+jnx_header_len;
/* ok to read extension length ? */
PACKET_HAS_SPACE_OR_TRUNC(tptr, 2);
jnx_ext_len = EXTRACT_16BITS(tptr);
jnx_header_len += 2;
tptr +=2;
/* nail up the total length -
* just in case something goes wrong
* with TLV parsing */
jnx_header_len += jnx_ext_len;
if (vflag>1)
printf(", PCAP Extension(s) total length %u",
jnx_ext_len);
PACKET_HAS_SPACE_OR_TRUNC(tptr, jnx_ext_len);
while (jnx_ext_len > JUNIPER_EXT_TLV_OVERHEAD) {
tlv_type = *(tptr++);
tlv_len = *(tptr++);
tlv_value = 0;
/* sanity check */
if (tlv_type == 0 || tlv_len == 0)
break;
if (vflag>1)
printf("\n\t %s Extension TLV #%u, length %u, value ",
tok2str(jnx_ext_tlv_values,"Unknown",tlv_type),
tlv_type,
tlv_len);
tlv_value = juniper_read_tlv_value(tptr, tlv_type, tlv_len);
switch (tlv_type) {
case JUNIPER_EXT_TLV_IFD_NAME:
/* FIXME */
break;
case JUNIPER_EXT_TLV_IFD_MEDIATYPE:
case JUNIPER_EXT_TLV_TTP_IFD_MEDIATYPE:
if (tlv_value != -1) {
if (vflag>1)
printf("%s (%u)",
tok2str(juniper_ifmt_values, "Unknown", tlv_value),
tlv_value);
}
break;
case JUNIPER_EXT_TLV_IFL_ENCAPS:
case JUNIPER_EXT_TLV_TTP_IFL_ENCAPS:
if (tlv_value != -1) {
if (vflag>1)
printf("%s (%u)",
tok2str(juniper_ifle_values, "Unknown", tlv_value),
tlv_value);
}
break;
case JUNIPER_EXT_TLV_IFL_IDX: /* fall through */
case JUNIPER_EXT_TLV_IFL_UNIT:
case JUNIPER_EXT_TLV_IFD_IDX:
default:
if (tlv_value != -1) {
if (vflag>1)
printf("%u",tlv_value);
}
break;
}
tptr+=tlv_len;
jnx_ext_len -= tlv_len+JUNIPER_EXT_TLV_OVERHEAD;
}
if (vflag>1)
printf("\n\t-----original packet-----\n\t");
}
if ((l2info->flags & JUNIPER_BPF_NO_L2 ) == JUNIPER_BPF_NO_L2 ) {
if (eflag)
printf("no-L2-hdr, ");
/* there is no link-layer present -
* perform the v4/v6 heuristics
* to figure out what it is
*/
PACKET_HAS_SPACE_OR_TRUNC(p, (jnx_header_len+4) + 1);
if(ip_heuristic_guess(p+jnx_header_len+4,l2info->length-(jnx_header_len+4)) == 0)
printf("no IP-hdr found!");
l2info->header_len=jnx_header_len+4;
return 0; /* stop parsing the output further */
}
l2info->header_len = jnx_header_len;
p+=l2info->header_len;
l2info->length -= l2info->header_len;
l2info->caplen -= l2info->header_len;
/* search through the cookie table and copy values matching for our PIC type */
while (lp->s != NULL) {
if (lp->pictype == l2info->pictype) {
l2info->cookie_len += lp->cookie_len;
switch (p[0]) {
case LS_COOKIE_ID:
l2info->cookie_type = LS_COOKIE_ID;
l2info->cookie_len += 2;
break;
case AS_COOKIE_ID:
l2info->cookie_type = AS_COOKIE_ID;
l2info->cookie_len = 8;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
#ifdef DLT_JUNIPER_MFR
/* MFR child links don't carry cookies */
if (l2info->pictype == DLT_JUNIPER_MFR &&
(p[0] & MFR_BE_MASK) == MFR_BE_MASK) {
l2info->cookie_len = 0;
}
#endif
l2info->header_len += l2info->cookie_len;
l2info->length -= l2info->cookie_len;
l2info->caplen -= l2info->cookie_len;
if (eflag)
printf("%s-PIC, cookie-len %u",
lp->s,
l2info->cookie_len);
if (l2info->cookie_len > 0) {
PACKET_HAS_SPACE_OR_TRUNC(p,l2info->cookie_len);
if (eflag)
printf(", cookie 0x");
for (idx = 0; idx < l2info->cookie_len; idx++) {
l2info->cookie[idx] = p[idx]; /* copy cookie data */
if (eflag) printf("%02x",p[idx]);
}
}
if (eflag) printf(": "); /* print demarc b/w L2/L3*/
l2info->proto = EXTRACT_16BITS(p+l2info->cookie_len);
break;
}
++lp;
}
p+=l2info->cookie_len;
/* DLT_ specific parsing */
switch(l2info->pictype) {
#ifdef DLT_JUNIPER_MLPPP
case DLT_JUNIPER_MLPPP:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(cheri_ptr(&l2info->cookie[6], 2))>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
break;
#endif
#ifdef DLT_JUNIPER_MLFR
case DLT_JUNIPER_MLFR:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
l2info->proto = EXTRACT_16BITS(p);
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(cheri_ptr(&l2info->cookie[6], 2))>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
}
break;
#endif
#ifdef DLT_JUNIPER_MFR
case DLT_JUNIPER_MFR:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
l2info->proto = EXTRACT_16BITS(p);
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(cheri_ptr(&l2info->cookie[6], 2))>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
break;
#endif
#ifdef DLT_JUNIPER_ATM2
case DLT_JUNIPER_ATM2:
PACKET_HAS_SPACE_OR_TRUNC(p,4);
/* ATM cell relay control word present ? */
if (l2info->cookie[7] & ATM2_PKT_TYPE_MASK) {
control_word = EXTRACT_32BITS(p);
/* some control word heuristics */
switch(control_word) {
case 0: /* zero control word */
case 0x08000000: /* < JUNOS 7.4 control-word */
case 0x08380000: /* cntl word plus cell length (56) >= JUNOS 7.4*/
l2info->header_len += 4;
break;
default:
break;
}
if (eflag)
printf("control-word 0x%08x ", control_word);
}
break;
#endif
#ifdef DLT_JUNIPER_GGSN
case DLT_JUNIPER_GGSN:
break;
#endif
#ifdef DLT_JUNIPER_ATM1
case DLT_JUNIPER_ATM1:
break;
#endif
#ifdef DLT_JUNIPER_PPP
case DLT_JUNIPER_PPP:
break;
#endif
#ifdef DLT_JUNIPER_CHDLC
case DLT_JUNIPER_CHDLC:
break;
#endif
#ifdef DLT_JUNIPER_ETHER
case DLT_JUNIPER_ETHER:
break;
#endif
#ifdef DLT_JUNIPER_FRELAY
case DLT_JUNIPER_FRELAY:
break;
#endif
default:
printf("Unknown Juniper DLT_ type %u: ", l2info->pictype);
break;
}
if (eflag > 1)
printf("hlen %u, proto 0x%04x, ",l2info->header_len,l2info->proto);
return 1; /* everything went ok so far. continue parsing */
trunc:
printf("[|juniper_hdr], length %u",h->len);
return 0;
}