static const u_char *
c_print(register const u_char *s, register const u_char *ep)
{
register u_char c;
register int flag;
flag = 1;
while (s < ep) {
c = *s++;
if (c == '\0') {
flag = 0;
break;
}
if (!ND_ISASCII(c)) {
c = ND_TOASCII(c);
putchar('M');
putchar('-');
}
if (!ND_ISPRINT(c)) {
c ^= 0x40; /* DEL to ?, others to alpha */
putchar('^');
}
putchar(c);
}
if (flag)
return NULL;
return (s);
}
/*
* Print out a null-terminated filename (or other ascii string).
* If ep is NULL, assume no truncation check is needed.
* Return true if truncated.
*/
int
fn_print(netdissect_options *ndo,
register const u_char *s, register const u_char *ep)
{
register int ret;
register u_char c;
ret = 1; /* assume truncated */
while (ep == NULL || s < ep) {
c = *s++;
if (c == '\0') {
ret = 0;
break;
}
if (!ND_ISASCII(c)) {
c = ND_TOASCII(c);
ND_PRINT((ndo, "M-"));
}
if (!ND_ISPRINT(c)) {
c ^= 0x40; /* DEL to ?, others to alpha */
ND_PRINT((ndo, "^"));
}
ND_PRINT((ndo, "%c", c));
}
return(ret);
}
static const u_char *
c_print(netdissect_options *ndo,
register const u_char *s, register const u_char *ep)
{
register u_char c;
register int flag;
flag = 1;
while (s < ep) {
c = *s++;
if (c == '\0') {
flag = 0;
break;
}
if (!ND_ISASCII(c)) {
c = ND_TOASCII(c);
ND_PRINT((ndo, "M-"));
}
if (!ND_ISPRINT(c)) {
c ^= 0x40; /* DEL to ?, others to alpha */
ND_PRINT((ndo, "^"));
}
ND_PRINT((ndo, "%c", c));
}
if (flag)
return NULL;
return (s);
}
/*
* Is this a VMS UCX file handle?
* Check for:
* (1) leading code byte [XXX not yet]
* (2) followed by string of printing chars & spaces
* (3) followed by string of nulls
*/
static int
is_UCX(netdissect_options *ndo, const unsigned char *fhp, u_int len)
{
u_int i;
int seen_null = 0;
/*
* Require at least 28 bytes of file handle; it's variable-length
* in NFSv3. "len" is in units of 32-bit words, not bytes.
*/
if (len < 28/4)
return(0);
for (i = 1; i < 14; i++) {
if (ND_ISPRINT(GET_U_1(fhp + i))) {
if (seen_null)
return(0);
else
continue;
}
else if (GET_U_1(fhp + i) == 0) {
seen_null = 1;
continue;
}
else
return(0);
}
return(1);
}
static void
print_attr_string(netdissect_options *ndo,
const u_char *data, u_int length, u_short attr_code)
{
u_int i;
ND_TCHECK_LEN(data, length);
switch(attr_code)
{
case TUNNEL_PASS:
if (length < 3)
goto trunc;
if (EXTRACT_U_1(data) && (EXTRACT_U_1(data) <= 0x1F))
ND_PRINT("Tag[%u] ", EXTRACT_U_1(data));
else
ND_PRINT("Tag[Unused] ");
data++;
length--;
ND_PRINT("Salt %u ", EXTRACT_BE_U_2(data));
data+=2;
length-=2;
break;
case TUNNEL_CLIENT_END:
case TUNNEL_SERVER_END:
case TUNNEL_PRIV_GROUP:
case TUNNEL_ASSIGN_ID:
case TUNNEL_CLIENT_AUTH:
case TUNNEL_SERVER_AUTH:
if (EXTRACT_U_1(data) <= 0x1F)
{
if (length < 1)
goto trunc;
if (EXTRACT_U_1(data))
ND_PRINT("Tag[%u] ", EXTRACT_U_1(data));
else
ND_PRINT("Tag[Unused] ");
data++;
length--;
}
break;
case EGRESS_VLAN_NAME:
if (length < 1)
goto trunc;
ND_PRINT("%s (0x%02x) ",
tok2str(rfc4675_tagged,"Unknown tag",EXTRACT_U_1(data)),
EXTRACT_U_1(data));
data++;
length--;
break;
}
for (i=0; i < length && EXTRACT_U_1(data); i++, data++)
ND_PRINT("%c", ND_ISPRINT(EXTRACT_U_1(data)) ? EXTRACT_U_1(data) : '.');
return;
trunc:
nd_print_trunc(ndo);
}
/*
* print vendor specific attributes
*/
static void
print_vendor_attr(netdissect_options *ndo,
const u_char *data, u_int length, u_short attr_code _U_)
{
u_int idx;
u_int vendor_id;
u_int vendor_type;
u_int vendor_length;
if (length < 4)
goto trunc;
ND_TCHECK_4(data);
vendor_id = EXTRACT_BE_U_4(data);
data+=4;
length-=4;
ND_PRINT("Vendor: %s (%u)",
tok2str(smi_values,"Unknown",vendor_id),
vendor_id);
while (length >= 2) {
ND_TCHECK_2(data);
vendor_type = EXTRACT_U_1(data);
vendor_length = EXTRACT_U_1(data + 1);
if (vendor_length < 2)
{
ND_PRINT("\n\t Vendor Attribute: %u, Length: %u (bogus, must be >= 2)",
vendor_type,
vendor_length);
return;
}
if (vendor_length > length)
{
ND_PRINT("\n\t Vendor Attribute: %u, Length: %u (bogus, goes past end of vendor-specific attribute)",
vendor_type,
vendor_length);
return;
}
data+=2;
vendor_length-=2;
length-=2;
ND_TCHECK_LEN(data, vendor_length);
ND_PRINT("\n\t Vendor Attribute: %u, Length: %u, Value: ",
vendor_type,
vendor_length);
for (idx = 0; idx < vendor_length ; idx++, data++)
ND_PRINT("%c", ND_ISPRINT(EXTRACT_U_1(data)) ? EXTRACT_U_1(data) : '.');
length-=vendor_length;
}
return;
trunc:
nd_print_trunc(ndo);
}
/*
* Print out a character, filtering out the non-printable ones
*/
void
fn_print_char(netdissect_options *ndo, u_char c)
{
if (!ND_ISASCII(c)) {
c = ND_TOASCII(c);
ND_PRINT((ndo, "M-"));
}
if (!ND_ISPRINT(c)) {
c ^= 0x40; /* DEL to ?, others to alpha */
ND_PRINT((ndo, "^"));
}
ND_PRINT((ndo, "%c", c));
}
static unsigned
rip_entry_print_v2(netdissect_options *ndo,
register const struct rip_netinfo *ni, const unsigned remaining)
{
register u_short family;
family = EXTRACT_16BITS(&ni->rip_family);
if (family == 0xFFFF) { /* variable-sized authentication structures */
uint16_t auth_type = EXTRACT_16BITS(&ni->rip_tag);
if (auth_type == 2) {
register u_char *p = (u_char *)&ni->rip_dest;
u_int i = 0;
ND_PRINT((ndo, "\n\t Simple Text Authentication data: "));
for (; i < RIP_AUTHLEN; p++, i++)
ND_PRINT((ndo, "%c", ND_ISPRINT(*p) ? *p : '.'));
} else if (auth_type == 3) {
ND_PRINT((ndo, "\n\t Auth header:"));
ND_PRINT((ndo, " Packet Len %u,", EXTRACT_16BITS((uint8_t *)ni + 4)));
ND_PRINT((ndo, " Key-ID %u,", *((uint8_t *)ni + 6)));
ND_PRINT((ndo, " Auth Data Len %u,", *((uint8_t *)ni + 7)));
ND_PRINT((ndo, " SeqNo %u,", EXTRACT_32BITS(&ni->rip_dest_mask)));
ND_PRINT((ndo, " MBZ %u,", EXTRACT_32BITS(&ni->rip_router)));
ND_PRINT((ndo, " MBZ %u", EXTRACT_32BITS(&ni->rip_metric)));
} else if (auth_type == 1) {
ND_PRINT((ndo, "\n\t Auth trailer:"));
print_unknown_data(ndo, (uint8_t *)&ni->rip_dest, "\n\t ", remaining);
return remaining; /* AT spans till the packet end */
} else {
ND_PRINT((ndo, "\n\t Unknown (%u) Authentication data:",
EXTRACT_16BITS(&ni->rip_tag)));
print_unknown_data(ndo, (uint8_t *)&ni->rip_dest, "\n\t ", remaining);
}
} else if (family != BSD_AFNUM_INET && family != 0) {
ND_PRINT((ndo, "\n\t AFI %s", tok2str(bsd_af_values, "Unknown (%u)", family)));
print_unknown_data(ndo, (uint8_t *)&ni->rip_tag, "\n\t ", RIP_ROUTELEN-2);
} else { /* BSD_AFNUM_INET or AFI 0 */
ND_PRINT((ndo, "\n\t AFI %s, %15s/%-2d, tag 0x%04x, metric: %u, next-hop: ",
tok2str(bsd_af_values, "%u", family),
ipaddr_string(ndo, &ni->rip_dest),
mask2plen(EXTRACT_32BITS(&ni->rip_dest_mask)),
EXTRACT_16BITS(&ni->rip_tag),
EXTRACT_32BITS(&ni->rip_metric)));
if (EXTRACT_32BITS(&ni->rip_router))
ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ni->rip_router)));
else
ND_PRINT((ndo, "self"));
}
return sizeof (*ni);
}
/*
* Print out a counted filename (or other ascii string).
* If ep is NULL, assume no truncation check is needed.
* Return true if truncated.
*/
int
fn_printn(netdissect_options *ndo,
register const u_char *s, register u_int n, register const u_char *ep)
{
register u_char c;
while (n > 0 && (ep == NULL || s < ep)) {
n--;
c = *s++;
if (!ND_ISASCII(c)) {
c = ND_TOASCII(c);
ND_PRINT((ndo, "M-"));
}
if (!ND_ISPRINT(c)) {
c ^= 0x40; /* DEL to ?, others to alpha */
ND_PRINT((ndo, "^"));
}
ND_PRINT((ndo, "%c", c));
}
return (n == 0) ? 0 : 1;
}
void
safeputchar(netdissect_options *ndo,
const u_char c)
{
ND_PRINT((ndo, (c < 0x80 && ND_ISPRINT(c)) ? "%c" : "\\0x%02x", c));
}