#include "netdissect-stdinc.h"
-#include <stdio.h>
-
#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
static unsigned
rip_entry_print_v1(netdissect_options *ndo, const u_char *p,
- unsigned remaining)
+ unsigned remaining)
{
const struct rip_entry_header *eh = (const struct rip_entry_header *)p;
u_short family;
if (remaining < RIP_ROUTELEN)
return (0);
ND_TCHECK_SIZE(ni);
- family = EXTRACT_BE_U_2(ni->rip_family);
+ family = GET_BE_U_2(ni->rip_family);
if (family != BSD_AFNUM_INET && family != 0) {
ND_PRINT("\n\t AFI %s, ", tok2str(bsd_af_values, "Unknown (%u)", family));
- print_unknown_data(ndo, p + sizeof(*eh), "\n\t ", RIP_ROUTELEN - sizeof(*eh));
+ print_unknown_data(ndo, p + sizeof(*eh), "\n\t ", RIP_ROUTELEN - sizeof(*eh));
return (RIP_ROUTELEN);
}
- if (EXTRACT_BE_U_2(ni->rip_mbz1) ||
- EXTRACT_BE_U_4(ni->rip_mbz2) ||
- EXTRACT_BE_U_4(ni->rip_mbz3)) {
+ if (GET_BE_U_2(ni->rip_mbz1) ||
+ GET_BE_U_4(ni->rip_mbz2) ||
+ GET_BE_U_4(ni->rip_mbz3)) {
/* MBZ fields not zero */
- print_unknown_data(ndo, p, "\n\t ", RIP_ROUTELEN);
+ print_unknown_data(ndo, p, "\n\t ", RIP_ROUTELEN);
return (RIP_ROUTELEN);
}
if (family == 0) {
ND_PRINT("\n\t AFI 0, %s, metric: %u",
- ipaddr_string(ndo, ni->rip_dest),
- EXTRACT_BE_U_4(ni->rip_metric));
+ GET_IPADDR_STRING(ni->rip_dest),
+ GET_BE_U_4(ni->rip_metric));
return (RIP_ROUTELEN);
} /* BSD_AFNUM_INET */
ND_PRINT("\n\t %s, metric: %u",
- ipaddr_string(ndo, ni->rip_dest),
- EXTRACT_BE_U_4(ni->rip_metric));
+ GET_IPADDR_STRING(ni->rip_dest),
+ GET_BE_U_4(ni->rip_metric));
return (RIP_ROUTELEN);
trunc:
return 0;
static unsigned
rip_entry_print_v2(netdissect_options *ndo, const u_char *p,
- unsigned remaining)
+ unsigned remaining)
{
const struct rip_entry_header *eh = (const struct rip_entry_header *)p;
u_short family;
if (remaining < sizeof(*eh))
return (0);
ND_TCHECK_SIZE(eh);
- family = EXTRACT_BE_U_2(eh->rip_family);
+ family = GET_BE_U_2(eh->rip_family);
if (family == 0xFFFF) { /* variable-sized authentication structures */
- uint16_t auth_type = EXTRACT_BE_U_2(eh->rip_tag);
+ uint16_t auth_type = GET_BE_U_2(eh->rip_tag);
p += sizeof(*eh);
remaining -= sizeof(*eh);
if (auth_type == 2) {
ND_PRINT("\n\t Simple Text Authentication data: ");
- if (nd_printzp(ndo, p, RIP_AUTHLEN, p + remaining))
- return (0);
+ nd_printjnp(ndo, p, RIP_AUTHLEN);
} else if (auth_type == 3) {
const struct rip_auth_crypto_v2 *ch;
if (remaining < sizeof(*ch))
return (0);
ND_PRINT("\n\t Auth header:");
- ND_PRINT(" Packet Len %u,", EXTRACT_BE_U_2(ch->rip_packet_len));
- ND_PRINT(" Key-ID %u,", EXTRACT_U_1(ch->rip_key_id));
- ND_PRINT(" Auth Data Len %u,", EXTRACT_U_1(ch->rip_auth_data_len));
- ND_PRINT(" SeqNo %u,", EXTRACT_BE_U_4(ch->rip_seq_num));
- ND_PRINT(" MBZ %u,", EXTRACT_BE_U_4(ch->rip_mbz1));
- ND_PRINT(" MBZ %u", EXTRACT_BE_U_4(ch->rip_mbz2));
+ ND_PRINT(" Packet Len %u,",
+ GET_BE_U_2(ch->rip_packet_len));
+ ND_PRINT(" Key-ID %u,", GET_U_1(ch->rip_key_id));
+ ND_PRINT(" Auth Data Len %u,",
+ GET_U_1(ch->rip_auth_data_len));
+ ND_PRINT(" SeqNo %u,", GET_BE_U_4(ch->rip_seq_num));
+ ND_PRINT(" MBZ %u,", GET_BE_U_4(ch->rip_mbz1));
+ ND_PRINT(" MBZ %u", GET_BE_U_4(ch->rip_mbz2));
} else if (auth_type == 1) {
ND_PRINT("\n\t Auth trailer:");
print_unknown_data(ndo, p, "\n\t ", remaining);
return (sizeof(*eh) + remaining); /* AT spans till the packet end */
} else {
ND_PRINT("\n\t Unknown (%u) Authentication data:",
- auth_type);
+ auth_type);
print_unknown_data(ndo, p, "\n\t ", remaining);
return (sizeof(*eh) + remaining); /* we don't know how long this is, so we go to the packet end */
}
} else if (family != BSD_AFNUM_INET && family != 0) {
ND_PRINT("\n\t AFI %s", tok2str(bsd_af_values, "Unknown (%u)", family));
- print_unknown_data(ndo, p + sizeof(*eh), "\n\t ", RIP_ROUTELEN - sizeof(*eh));
+ print_unknown_data(ndo, p + sizeof(*eh), "\n\t ", RIP_ROUTELEN - sizeof(*eh));
} else { /* BSD_AFNUM_INET or AFI 0 */
ni = (const struct rip_netinfo_v2 *)p;
ND_TCHECK_SIZE(ni);
if (remaining < sizeof(*ni))
return (0);
ND_PRINT("\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_BE_U_4(ni->rip_dest_mask)),
- EXTRACT_BE_U_2(ni->rip_tag),
- EXTRACT_BE_U_4(ni->rip_metric));
- if (EXTRACT_BE_U_4(ni->rip_router))
- ND_PRINT("%s", ipaddr_string(ndo, ni->rip_router));
+ tok2str(bsd_af_values, "%u", family),
+ GET_IPADDR_STRING(ni->rip_dest),
+ mask2plen(GET_BE_U_4(ni->rip_dest_mask)),
+ GET_BE_U_2(ni->rip_tag),
+ GET_BE_U_4(ni->rip_metric));
+ if (GET_BE_U_4(ni->rip_router))
+ ND_PRINT("%s", GET_IPADDR_STRING(ni->rip_router));
else
ND_PRINT("self");
}
void
rip_print(netdissect_options *ndo,
- const u_char *dat, u_int length)
+ const u_char *dat, u_int length)
{
const struct rip *rp;
uint8_t vers, cmd;
const u_char *p;
- u_int i, j;
+ u_int len, routecount;
unsigned entry_size;
ndo->ndo_protocol = "rip";
nd_print_trunc(ndo);
return;
}
- i = ndo->ndo_snapend - dat;
- if (i > length)
- i = length;
- if (i < sizeof(*rp)) {
+ len = ND_BYTES_AVAILABLE_AFTER(dat);
+ if (len > length)
+ len = length;
+ if (len < sizeof(*rp)) {
nd_print_trunc(ndo);
return;
}
- i -= sizeof(*rp);
+ len -= sizeof(*rp);
rp = (const struct rip *)dat;
ND_TCHECK_SIZE(rp);
- vers = EXTRACT_U_1(rp->rip_vers);
+ vers = GET_U_1(rp->rip_vers);
ND_PRINT("%sRIPv%u",
- (ndo->ndo_vflag >= 1) ? "\n\t" : "",
- vers);
+ (ndo->ndo_vflag >= 1) ? "\n\t" : "",
+ vers);
if (vers == 0) {
/*
}
/* dump version and lets see if we know the commands name*/
- cmd = EXTRACT_U_1(rp->rip_cmd);
+ cmd = GET_U_1(rp->rip_cmd);
ND_PRINT(", %s, length: %u",
tok2str(rip_cmd_values, "unknown command (%u)", cmd),
length);
switch (vers) {
case 1:
- j = length / RIP_ROUTELEN;
- ND_PRINT(", routes: %u", j);
+ routecount = length / RIP_ROUTELEN;
+ ND_PRINT(", routes: %u", routecount);
p = (const u_char *)(rp + 1);
- while (i != 0) {
- entry_size = rip_entry_print_v1(ndo, p, i);
+ while (len != 0) {
+ entry_size = rip_entry_print_v1(ndo, p, len);
if (entry_size == 0) {
/* Error */
nd_print_trunc(ndo);
break;
}
+ if (len < entry_size) {
+ ND_PRINT(" [remaining entries length %u < %u]",
+ len, entry_size);
+ nd_print_invalid(ndo);
+ break;
+ }
p += entry_size;
- i -= entry_size;
+ len -= entry_size;
}
break;
case 2:
- j = length / RIP_ROUTELEN;
- ND_PRINT(", routes: %u or less", j);
+ routecount = length / RIP_ROUTELEN;
+ ND_PRINT(", routes: %u or less", routecount);
p = (const u_char *)(rp + 1);
- while (i != 0) {
- entry_size = rip_entry_print_v2(ndo, p, i);
+ while (len != 0) {
+ entry_size = rip_entry_print_v2(ndo, p, len);
if (entry_size == 0) {
/* Error */
nd_print_trunc(ndo);
break;
}
-#if 0
- if (i < entry_size) {
- ND_PRINT("WTF?");
+ if (len < entry_size) {
+ ND_PRINT(" [remaining entries length %u < %u]",
+ len, entry_size);
+ nd_print_invalid(ndo);
break;
}
-#endif
p += entry_size;
- i -= entry_size;
+ len -= entry_size;
}
break;
projects / tcpdump / blobdiff