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ubgpsuite/lonetix/bgp/dump_isolario.c

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// SPDX-License-Identifier: LGPL-3.0-or-later
/**
* \file bgp/dump_isolario.c
*
* Isolario `bgpscanner`-like dump format.
*
* \copyright The DoubleFourteen Code Forge (C) All Rights Reserved
* \author Lorenzo Cogotti
*/
#include "bgp/bgp_local.h"
#include "bgp/dump.h"
#include "sys/endian.h"
#include "sys/vt100.h"
#include "bufio.h"
#include "numlib.h"
#include "strlib.h"
#include <assert.h>
#include <string.h>
#define OPEN_MARKER '>'
#define ANNOUNCE_MARKER '+'
#define RIB_MARKER '='
#define STATE_CHANGE_MARKER '#'
#define WITHDRAW_MARKER '-'
#define NOTIFY_MARKER '!'
#define KEEPALIVE_MARKER '@'
#define ROUTE_REFRESH_MARKER '^'
#define CLOSE_MARKER '<'
#define UNKNOWN_MARKER '?'
#define SEP_CHAR '|'
#define SEP_CHAR_BAD '~'
#define CORRUPT_WARN "CORRUPTED"
// Aggregated information context for MRT dumps,
// useful for line trailing fields and for MP NEXT_HOP reconstruction
typedef struct Dumpfmtctx Dumpfmtctx;
struct Dumpfmtctx {
Boolean8 hasPeer;
Boolean8 hasTimestamp;
Boolean8 isAsn32bit;
Boolean8 isAddPath;
Boolean8 isRibv2;
Boolean8 withColors;
const Mrthdr *hdr; // NULL if not MRT
Uint32 peerAs; // host endian
Uint32 pathId; // host endian
Uint32 timestamp; // host endian
Uint32 microsecs; // host endian - non-zero if extended timestamp is available
Ipadr peerAddr;
};
/**
* Binary Tree Indexed by PATH ID:
*
* e.g.
* Root -> +---------------+
* | PATH ID: 0 |
* | Prefix List |
* | +--------------------------------------------+
* | | head --------------------------------+ |
* +--| | | Circular list, last
* / | nextPrefix V | element is the tree
* / | | P[N] | <-- ... <-- | P[1] | <-- | P[0] | | node itself.
* / +--------------------------------------------+
* / \
* / children[0] \ children[1]
* +--------------+ +--------------+
* | PATH ID: 1 | | Path ID: 2 |
* | Prefix List | | Prefix List |
* | [...] | | [...] |
* +--------------+ +--------------+
*/
typedef struct Prefixtree Prefixtree;
struct Prefixtree {
Uint32 pathId; // host endian
Afi afi;
RawPrefix *pfx;
union {
Prefixtree *nextPrefix; // for prefix list element
Prefixtree *head; // for tree node
};
Prefixtree *children[2];
};
#define MAXSEPS 10
// Empty separators buffer for state-change/unknown BGP4MP subtypes
static const char SEPS_BUF[MAXSEPS] = {
SEP_CHAR, SEP_CHAR, SEP_CHAR, SEP_CHAR,
SEP_CHAR, SEP_CHAR, SEP_CHAR, SEP_CHAR,
SEP_CHAR, SEP_CHAR
};
static const char *Bgp_CapabilityToString(BgpCapCode code)
{
switch (code) {
case BGP_CAP_RESERVED: return "RESERVED";
case BGP_CAP_MULTIPROTOCOL: return "MULTIPROTOCOL";
case BGP_CAP_ROUTE_REFRESH: return "ROUTE_REFRESH";
case BGP_CAP_COOPERATIVE_ROUTE_FILTERING: return "COOPERATIVE_ROUTE_FILTERING";
case BGP_CAP_MULTIPLE_ROUTES_DEST: return "MULTIPLE_ROUTES_DEST";
case BGP_CAP_EXTENDED_NEXT_HOP: return "EXTENDED_NEXT_HOP";
case BGP_CAP_EXTENDED_MESSAGE: return "EXTENDED_MESSAGE";
case BGP_CAP_BGPSEC: return "BGPSEC";
case BGP_CAP_MULTIPLE_LABELS: return "MULTIPLE_LABELS";
case BGP_CAP_BGP_ROLE: return "BGP_ROLE";
case BGP_CAP_GRACEFUL_RESTART: return "GRACEFUL_RESTART";
case BGP_CAP_ASN32BIT: return "ASN32BIT";
case BGP_CAP_DYNAMIC_CISCO: return "DYNAMIC_CISCO";
case BGP_CAP_DYNAMIC: return "DYNAMIC";
case BGP_CAP_MULTISESSION: return "MULTISESSION";
case BGP_CAP_ADD_PATH: return "ADD_PATH";
case BGP_CAP_ENHANCED_ROUTE_REFRESH: return "ENHANCED_ROUTE_REFRESH";
case BGP_CAP_LONG_LIVED_GRACEFUL_RESTART: return "LONG_LIVED_GRACEFUL_RESTART";
case BGP_CAP_CP_ORF: return "CP_ORF";
case BGP_CAP_FQDN: return "FQDN";
case BGP_CAP_ROUTE_REFRESH_CISCO: return "ROUTE_REFRESH_CISCO";
case BGP_CAP_ORF_CISCO: return "ORF_CISCO";
case BGP_CAP_MULTISESSION_CISCO: return "MULTISESSION_CISCO";
default: return NULL;
}
}
static const char *Bgp_KnownCommunityToString(BgpCommCode code)
{
switch (code) {
case BGP_COMMUNITY_PLANNED_SHUT: return "PLANNED_SHUT";
case BGP_COMMUNITY_ACCEPT_OWN: return "ACCEPT_OWN";
case BGP_COMMUNITY_ROUTE_FILTER_TRANSLATED_V4: return "ROUTE_FILTER_TRANSLATED_V4";
case BGP_COMMUNITY_ROUTE_FILTER_V4: return "ROUTE_FILTER_V4";
case BGP_COMMUNITY_ROUTE_FILTER_TRANSLATED_V6: return "ROUTE_FILTER_TRANSLATED_V6";
case BGP_COMMUNITY_ROUTE_FILTER_V6: return "ROUTE_FILTER_V6";
case BGP_COMMUNITY_LLGR_STALE: return "LLGR_STALE";
case BGP_COMMUNITY_NO_LLGR: return "NO_LLGR";
case BGP_COMMUNITY_ACCEPT_OWN_NEXTHOP: return "ACCEPT_OWN_NEXTHOP";
case BGP_COMMUNITY_STANDBY_PE: return "STANDBY_PE";
case BGP_COMMUNITY_BLACKHOLE: return "BLACKHOLE";
case BGP_COMMUNITY_NO_EXPORT: return "NO_EXPORT";
case BGP_COMMUNITY_NO_ADVERTISE: return "NO_ADVERTISE";
case BGP_COMMUNITY_NO_EXPORT_SUBCONFED: return "NO_EXPORT_SUBCONFED";
case BGP_COMMUNITY_NO_PEER: return "NO_PEER";
default: return NULL;
}
}
static void NormalizeExtendedTimestamp(Dumpfmtctx *ctx)
{
ctx->timestamp += ctx->microsecs / 1000000;
ctx->microsecs %= 1000000;
}
static void DumpUnknown(Stmwrbuf *sb, BgpType type)
{
Bufio_Putc(sb, UNKNOWN_MARKER);
Bufio_Putc(sb, SEP_CHAR);
Bufio_Putx(sb, type);
Bufio_Putsn(sb, SEPS_BUF, 8);
}
static Sint32 DumpCaps(Stmwrbuf *sb, Bgpcapiter *caps, const Dumpfmtctx *ctx)
{
const char *s;
Bgpcap *cap;
char buf[16];
USED(ctx->withColors); // TODO
Sint32 ncaps = 0;
while ((cap = Bgp_NextCap(caps)) != NULL) {
s = Bgp_CapabilityToString(cap->code);
if (!s) {
Utoa(cap->code, buf);
s = buf;
}
if (ncaps > 0)
Bufio_Putc(sb, ' ');
Bufio_Puts(sb, s);
ncaps++;
}
return ncaps;
}
static Judgement DumpAttributes(Stmwrbuf *sb,
const Bgpattrseg *tpa,
Bgpattrtab table,
const Dumpfmtctx *ctx)
{
Aspathiter ases;
Nexthopiter nh;
Asn asn;
Ipadr *addr;
char buf[128];
// AS_PATH
if (Bgp_StartRealAsPath(&ases, tpa, ctx->isAsn32bit, table) != OK)
return NG;
static const Asseg emptySeqSeg = { AS_SEQUENCE, 0 };
Boolean firstAsn = TRUE;
const Asseg *lastSeg = &emptySeqSeg;
while ((asn = Bgp_NextAsPath(&ases)) != -1) {
if (lastSeg != BGP_CURASSEG(&ases)) {
// Segment changed, we might need to close a SET
if (lastSeg->type == AS_SET) {
// Close pending AS_SET
Bufio_Putc(sb, '}');
firstAsn = FALSE; // an empty set still counts as an AS
}
// Update last segment type
lastSeg = BGP_CURASSEG(&ases);
if (lastSeg->type == AS_SET) {
// Open a new AS_SET
if (!firstAsn)
Bufio_Putc(sb, ' ');
Bufio_Putc(sb, '{');
firstAsn = TRUE;
}
}
// Separate consecutive ASN
if (!firstAsn)
Bufio_Putc(sb, (lastSeg->type == AS_SET) ? ',' : ' ');
// Write current ASN
Bufio_Putu(sb, beswap32(ASN(asn)));
firstAsn = FALSE;
}
if (Bgp_GetErrStat(NULL))
return NG;
// Close last AS_SET, if necessary
if (lastSeg->type == AS_SET)
Bufio_Putc(sb, '}');
// NEXT_HOP
Bufio_Putc(sb, SEP_CHAR);
if (ctx->isRibv2)
Bgp_StartAllRibv2NextHops(&nh, ctx->hdr, tpa, table);
else
Bgp_StartAllNextHops(&nh, tpa, table);
if (Bgp_GetErrStat(NULL))
return NG;
Boolean firstNextHop = TRUE;
while ((addr = Bgp_NextNextHop(&nh)) != NULL) {
if (!firstNextHop)
Bufio_Putc(sb, ' ');
char *ep = Ip_AdrToString(addr, buf);
Bufio_Putsn(sb, buf, ep - buf);
}
if (Bgp_GetErrStat(NULL))
return NG;
// ORIGIN
Bufio_Putc(sb, SEP_CHAR);
Bgpattr *origin = Bgp_GetUpdateAttribute(tpa, BGP_ATTR_ORIGIN, table);
if (Bgp_GetErrStat(NULL))
return NG;
if (origin) {
if (!BGP_CHKORIGINSIZ(origin))
return Bgp_SetErrStat(BGPETRUNCATTR); // TODO BGPEBADORIGIN
switch (BGP_ORIGIN(origin)) {
case BGP_ORIGIN_IGP: Bufio_Putc(sb, 'i'); break;
case BGP_ORIGIN_EGP: Bufio_Putc(sb, 'e'); break;
case BGP_ORIGIN_INCOMPLETE: Bufio_Putc(sb, '?'); break;
default:
return Bgp_SetErrStat(BGPETRUNCATTR); // TODO BGPEBADORIGIN
}
}
// ATOMIC_AGGREGATE
Bufio_Putc(sb, SEP_CHAR);
Bgpattr *atomicAggr = Bgp_GetUpdateAttribute(tpa, BGP_ATTR_ATOMIC_AGGREGATE, table);
if (Bgp_GetErrStat(NULL))
return NG;
if (atomicAggr) {
if (!BGP_CHKATOMICAGGRSIZ(atomicAggr))
return Bgp_SetErrStat(BGPETRUNCATTR); // TODO BGPEBADATOMICAGGR
Bufio_Puts(sb, "AT");
}
// AGGREGATOR
Bufio_Putc(sb, SEP_CHAR);
Boolean isAggr32bit = ctx->isAsn32bit;
Bgpattr *aggr = Bgp_GetRealAggregator(tpa, &isAggr32bit, table);
if (Bgp_GetErrStat(NULL))
return NG;
if (aggr) {
if (!BGP_CHKAGGRSIZ(aggr, isAggr32bit))
return Bgp_SetErrStat(BGPETRUNCATTR); // TODO BGPEBADAGGR
const Bgpaggr *aggrp = (const Bgpaggr *) BGP_ATTRPTR(aggr);
if (isAggr32bit) {
char *ep = Ipv4_AdrToString(&aggrp->a32.addr, buf);
Bufio_Putu(sb, beswap32(aggrp->a32.asn));
Bufio_Putc(sb, ' ');
Bufio_Putsn(sb, buf, ep - buf);
} else {
char *ep = Ipv4_AdrToString(&aggrp->a16.addr, buf);
Bufio_Putu(sb, beswap16(aggrp->a16.asn));
Bufio_Putc(sb, ' ');
Bufio_Putsn(sb, buf, ep - buf);
}
}
// Communities
// => COMMUNITY
Bufio_Putc(sb, SEP_CHAR);
Bgpcommiter communities;
Bgpattr *community = Bgp_GetUpdateAttribute(tpa, BGP_ATTR_COMMUNITY, table);
if (Bgp_GetErrStat(NULL))
return NG;
unsigned ncommunities = 0;
if (community) {
Bgpcomm *comm;
if (Bgp_StartCommunity(&communities, community) != OK)
return NG;
while ((comm = Bgp_NextCommunity(&communities)) != NULL) {
if (ncommunities > 0)
Bufio_Putc(sb, ' ');
const char *knownString = Bgp_KnownCommunityToString(comm->code);
if (knownString)
Bufio_Puts(sb, knownString);
else {
char *ep = Utoa(beswap16(comm->hi), buf);
*ep++ = ':';
ep = Utoa(beswap16(comm->lo), ep);
Bufio_Putsn(sb, buf, ep - buf);
}
ncommunities++;
}
if (Bgp_GetErrStat(NULL))
return NG; // iteration failed
}
// => TODO EXTENDED_COMMUNITY
// => LARGE_COMMUNITY
Bgpattr *largeCommunity = Bgp_GetUpdateAttribute(tpa, BGP_ATTR_LARGE_COMMUNITY, table);
if (Bgp_GetErrStat(NULL))
return NG;
if (largeCommunity) {
Bgplgcomm *comm;
if (Bgp_StartCommunity(&communities, largeCommunity) != OK)
return NG;
while ((comm = Bgp_NextLargeCommunity(&communities)) != NULL) {
if (ncommunities > 0)
Bufio_Putc(sb, ' ');
char *ep = Utoa(beswap32(comm->global), buf);
*ep++ = ':';
ep = Utoa(beswap32(comm->local1), ep);
*ep++ = ':';
ep = Utoa(beswap32(comm->local2), ep);
Bufio_Putsn(sb, buf, ep - buf);
ncommunities++;
}
if (Bgp_GetErrStat(NULL))
return NG;
}
return OK;
}
static void DumpMrtInfoTrailer(Stmwrbuf *sb, const Dumpfmtctx *ctx)
{
char buf[128];
// Peer address, ASN
if (ctx->hasPeer) {
char *ep = Ip_AdrToString(&ctx->peerAddr, buf);
Bufio_Putsn(sb, buf, ep - buf);
Bufio_Putc(sb, ' ');
Bufio_Putu(sb, ctx->peerAs);
if (ctx->isAddPath) {
Bufio_Putc(sb, ' ');
Bufio_Putu(sb, ctx->pathId);
}
}
Bufio_Putc(sb, SEP_CHAR);
// MRT timestamp + microseconds if extended
if (ctx->hasTimestamp) {
Bufio_Putu(sb, ctx->timestamp);
if (ctx->microsecs > 0) {
Utoa(ctx->microsecs, buf);
Df_strpadl(buf, '0', 6);
Bufio_Putc(sb, '.');
Bufio_Puts(sb, buf);
}
}
Bufio_Putc(sb, SEP_CHAR);
// ASN32BIT flag
Bufio_Putc(sb, ctx->isAsn32bit ? '1' : '0');
Bufio_Puts(sb, EOLN);
}
static void WarnCorrupted(Stmwrbuf *sb, const Dumpfmtctx *ctx)
{
Bufio_Putc(sb, SEP_CHAR_BAD);
if (ctx->withColors)
Bufio_Puts(sb, VTSGR(VTINV) CORRUPT_WARN VTSGR(VTNOINV));
else
Bufio_Puts(sb, CORRUPT_WARN);
Bufio_Putc(sb, SEP_CHAR_BAD);
}
static Sint32 DumpRoutesFast(char marker,
Stmwrbuf *sb,
Bgpmpiter *prefixes,
const Bgpattrseg *tpa,
Bgpattrtab table,
const Dumpfmtctx *ctx)
{
Prefix *pfx;
char buf[PFX_STRLEN + 1];
assert(!ctx->isAddPath);
Sint32 nprefixes = 0;
while ((pfx = Bgp_NextMpPrefix(prefixes)) != NULL) {
char *ep = Bgp_PrefixToString(pfx->afi, PLAINPFX(pfx), buf);
if (nprefixes == 0) {
Bufio_Putc(sb, marker);
Bufio_Putc(sb, SEP_CHAR);
} else
Bufio_Putc(sb, ' ');
Bufio_Putsn(sb, buf, ep - buf);
nprefixes++;
}
if (Bgp_GetErrStat(NULL))
return -1;
if (nprefixes == 0)
return 0; // drop line, nothing to report
Bufio_Putc(sb, SEP_CHAR);
if (DumpAttributes(sb, tpa, table, ctx) != OK)
return -1;
Bufio_Putc(sb, SEP_CHAR);
DumpMrtInfoTrailer(sb, ctx);
return nprefixes;
}
// Add node 'n' to the prefix tree rooted at '*pr'.
static unsigned InsertRoute(Prefixtree **pr, Prefixtree *n)
{
unsigned depth = 0;
Prefixtree *i;
while ((i = *pr) && n->pathId != i->pathId) {
int idx = (n->pathId > i->pathId);
pr = &i->children[idx];
depth++;
}
if (i) {
// Collision, PATH ID already seen,
// copy childen pointers over
n->nextPrefix = i->head;
i->head = n;
} else {
// First prefix with this PATH ID, becomes list head
n->head = n;
n->children[0] = n->children[1] = NULL;
*pr = n;
depth++;
}
return depth;
}
static Sint32 DumpRouteWithPathId(char marker,
Stmwrbuf *sb,
const Prefixtree *n,
const Bgpattrseg *tpa,
Bgpattrtab table,
Dumpfmtctx *ctx)
{
char buf[PFX_STRLEN + 1];
assert(ctx->isAddPath);
ctx->pathId = n->pathId;
Bufio_Putc(sb, marker);
Bufio_Putc(sb, SEP_CHAR);
Sint32 nprefixes = 0;
Prefixtree *i = n->head;
do {
char *ep = Bgp_PrefixToString(i->afi, i->pfx, buf);
if (nprefixes > 0)
Bufio_Putc(sb, ' ');
Bufio_Putsn(sb, buf, ep - buf);
nprefixes++;
i = i->nextPrefix;
} while (i != n);
Bufio_Putc(sb, SEP_CHAR);
if (DumpAttributes(sb, tpa, table, ctx) != OK)
return -1;
Bufio_Putc(sb, SEP_CHAR);
DumpMrtInfoTrailer(sb, ctx);
return nprefixes;
}
static Sint32 DumpRoutes(char marker,
Stmwrbuf *sb,
Bgpmpiter *prefixes,
const Bgpattrseg *tpa,
Bgpattrtab table,
Dumpfmtctx *ctx)
{
Prefix *pfx;
Prefixtree *n;
// Fast case when PATH ID is absent
if (!ctx->isAddPath)
return DumpRoutesFast(marker, sb, prefixes, tpa, table, ctx);
// When PATH ID is available, we build a net tree grouped by PATH ID
// directly on stack
Sint32 nprefixes = 0;
unsigned maxDepth = 0;
Prefixtree *root = NULL;
while ((pfx = Bgp_NextMpPrefix(prefixes)) != NULL) {
n = (Prefixtree *) alloca(sizeof(*n));
n->pathId = beswap32(pfx->pathId);
n->afi = pfx->afi;
n->pfx = BGP_CURMPRAWPFX(prefixes);
unsigned depth = InsertRoute(&root, n);
if (depth > maxDepth)
maxDepth = depth;
}
if (Bgp_GetErrStat(NULL))
return -1;
// Print every route inside tree
Prefixtree **stackb = (Prefixtree **) alloca(maxDepth * sizeof(*stackb));
unsigned si = 0;
n = root;
while (TRUE) {
while (n) {
stackb[si++] = n;
n = n->children[0];
}
if (si == 0)
break;
n = stackb[--si];
// Generate new line
nprefixes += DumpRouteWithPathId(marker, sb, n, tpa, table, ctx);
n = n->children[1];
}
return nprefixes;
}
static Judgement DumpBgp(Stmwrbuf *sb,
BgpType type,
const void *data,
size_t nbytes,
Bgpattrtab table,
Dumpfmtctx *ctx)
{
Bgpcapiter caps;
Bgpmpiter prefixes;
Bgpwithdrawnseg *withdrawn;
Bgpparmseg *parms;
Bgpattrseg *tpa;
Bgpattr *mpAttr;
void *nlri;
size_t nlriSize;
switch (type) {
case BGP_OPEN:
Bufio_Putc(sb, OPEN_MARKER);
parms = Bgp_GetParmsFromMemory(data, nbytes);
if (!parms)
goto corrupted;
Bgp_StartCaps(&caps, parms);
Bufio_Putc(sb, SEP_CHAR);
DumpCaps(sb, &caps, ctx);
Bufio_Putsn(sb, SEPS_BUF, 7);
DumpMrtInfoTrailer(sb, ctx);
break;
case BGP_UPDATE:
withdrawn = Bgp_GetWithdrawnFromMemory(data, nbytes);
if (!withdrawn)
goto corrupted;
tpa = Bgp_GetAttributesFromMemory(data, nbytes);
if (!tpa)
goto corrupted;
mpAttr = Bgp_GetUpdateAttribute(tpa, BGP_ATTR_MP_UNREACH_NLRI, table);
if (Bgp_GetErrStat(NULL))
goto corrupted;
Bgp_InitMpWithdrawn(&prefixes, withdrawn, mpAttr, ctx->isAddPath);
if (DumpRoutes(WITHDRAW_MARKER, sb, &prefixes, tpa, table, ctx) == -1)
goto corrupted;
nlri = Bgp_GetNlriFromMemory(data, nbytes, &nlriSize);
if (!nlri)
goto corrupted;
mpAttr = Bgp_GetUpdateAttribute(tpa, BGP_ATTR_MP_REACH_NLRI, table);
if (Bgp_GetErrStat(NULL))
goto corrupted;
Bgp_InitMpNlri(&prefixes, nlri, nlriSize, mpAttr, ctx->isAddPath);
if (DumpRoutes(ANNOUNCE_MARKER, sb, &prefixes, tpa, table, ctx) == -1)
goto corrupted;
break;
case BGP_NOTIFICATION:
Bufio_Putc(sb, NOTIFY_MARKER);
Bufio_Putsn(sb, SEPS_BUF, 8);
// TODO dump message
DumpMrtInfoTrailer(sb, ctx);
break;
case BGP_KEEPALIVE:
Bufio_Putc(sb, KEEPALIVE_MARKER);
Bufio_Putsn(sb, SEPS_BUF, 8);
DumpMrtInfoTrailer(sb, ctx);
break;
case BGP_ROUTE_REFRESH:
Bufio_Putc(sb, ROUTE_REFRESH_MARKER);
Bufio_Putsn(sb, SEPS_BUF, 8);
DumpMrtInfoTrailer(sb, ctx);
break;
case BGP_CLOSE:
Bufio_Putc(sb, CLOSE_MARKER);
Bufio_Putsn(sb, SEPS_BUF, 8);
DumpMrtInfoTrailer(sb, ctx);
break;
default:
DumpUnknown(sb, type);
DumpMrtInfoTrailer(sb, ctx);
break;
}
return OK;
corrupted:
WarnCorrupted(sb, ctx);
return NG;
}
static Sint64 Isolario_DumpMsg(const Bgphdr *hdr,
unsigned flags,
void *streamp,
const StmOps *ops,
Bgpattrtab table)
{
Stmwrbuf sb;
size_t nbytes = beswap16(hdr->len);
assert(nbytes >= BGP_HDRSIZ);
nbytes -= BGP_HDRSIZ;
Dumpfmtctx ctx;
memset(&ctx, 0, sizeof(ctx));
ctx.isAsn32bit = BGP_ISASN32BIT(flags);
ctx.isAddPath = BGP_ISADDPATH(flags);
Bufio_WrInit(&sb, streamp, ops);
DumpBgp(&sb, hdr->type, hdr + 1, nbytes, table, &ctx);
return Bufio_Flush(&sb);
}
static Sint64 Isolario_DumpMsgWc(const Bgphdr *hdr,
unsigned flags,
void *streamp,
const StmOps *ops,
Bgpattrtab table)
{
Stmwrbuf sb;
size_t nbytes = beswap16(hdr->len);
assert(nbytes >= BGP_HDRSIZ);
nbytes -= BGP_HDRSIZ;
Dumpfmtctx ctx;
memset(&ctx, 0, sizeof(ctx));
ctx.isAsn32bit = BGP_ISASN32BIT(flags);
ctx.isAddPath = BGP_ISADDPATH(flags);
ctx.withColors = TRUE;
Bufio_WrInit(&sb, streamp, ops);
DumpBgp(&sb, hdr->type, hdr + 1, nbytes, table, &ctx);
return Bufio_Flush(&sb);
}
static Sint64 Isolario_DumpRibv2(const Mrthdr *hdr,
const Mrtpeerentv2 *peer,
const Mrtribentv2 *rib,
void *streamp,
const StmOps *ops,
Bgpattrtab table)
{
assert(hdr->type == MRT_TABLE_DUMPV2);
assert(TABLE_DUMPV2_ISRIB(hdr->subtype));
Stmwrbuf sb;
Dumpfmtctx ctx;
char buf[APPFX_STRLEN + 1];
char *ep;
Bufio_WrInit(&sb, streamp, ops);
memset(&ctx, 0, sizeof(ctx));
ctx.hasPeer = TRUE;
ctx.hasTimestamp = TRUE;
ctx.isAsn32bit = TRUE; // always the case for TABLE_DUMPV2
ctx.isRibv2 = TRUE;
ctx.hdr = hdr;
ctx.timestamp = beswap32(rib->originatedTime);
switch (peer->type & (MRT_PEER_ASN32BIT|MRT_PEER_IP6)) {
case MRT_PEER_ASN32BIT | MRT_PEER_IP6:
ctx.peerAs = beswap32(peer->a32v6.asn);
ctx.peerAddr.family = IP6;
ctx.peerAddr.v6 = peer->a32v6.addr;
break;
case MRT_PEER_IP6:
ctx.peerAs = beswap16(peer->a16v6.asn);
ctx.peerAddr.family = IP6;
ctx.peerAddr.v6 = peer->a16v6.addr;
break;
case MRT_PEER_ASN32BIT:
ctx.peerAs = beswap32(peer->a32v4.asn);
ctx.peerAddr.family = IP4;
ctx.peerAddr.v4 = peer->a16v4.addr;
break;
default:
ctx.peerAs = beswap16(peer->a16v4.asn);
ctx.peerAddr.family = IP4;
ctx.peerAddr.v4 = peer->a16v4.addr;
break;
}
const Mrtribhdrv2 *ribhdr = RIBV2_HDR(hdr);
const Bgpattrseg *tpa = RIBV2_GETATTRIBS(hdr->subtype, rib);
switch (hdr->subtype) {
case TABLE_DUMPV2_RIB_IPV4_UNICAST_ADDPATH:
case TABLE_DUMPV2_RIB_IPV4_MULTICAST_ADDPATH:
ctx.isAddPath = TRUE;
ctx.pathId = beswap32(RIBV2_GETPATHID(rib));
/*FALLTHROUGH*/
case TABLE_DUMPV2_RIB_IPV4_UNICAST:
case TABLE_DUMPV2_RIB_IPV4_MULTICAST:
ep = Bgp_PrefixToString(AFI_IP, &ribhdr->nlri, buf);
break;
case TABLE_DUMPV2_RIB_IPV6_UNICAST_ADDPATH:
case TABLE_DUMPV2_RIB_IPV6_MULTICAST_ADDPATH:
ctx.isAddPath = TRUE;
ctx.pathId = beswap32(RIBV2_GETPATHID(rib));
/*FALLTHROUGH*/
case TABLE_DUMPV2_RIB_IPV6_UNICAST:
case TABLE_DUMPV2_RIB_IPV6_MULTICAST:
ep = Bgp_PrefixToString(AFI_IP6, &ribhdr->nlri, buf);
break;
case TABLE_DUMPV2_RIB_GENERIC_ADDPATH:
ctx.isAddPath = TRUE;
ctx.pathId = beswap32(RIBV2_GETPATHID(rib));
/*FALLTHROUGH*/
case TABLE_DUMPV2_RIB_GENERIC:
ep = Bgp_PrefixToString(ribhdr->gen.afi, &ribhdr->gen.nlri, buf);
break;
default:
UNREACHABLE;
break;
}
assert(ep != NULL);
Bufio_Putc(&sb, RIB_MARKER);
Bufio_Putc(&sb, SEP_CHAR);
Bufio_Putsn(&sb, buf, ep - buf);
Bufio_Putc(&sb, SEP_CHAR);
DumpAttributes(&sb, tpa, table, &ctx);
Bufio_Putc(&sb, SEP_CHAR);
DumpMrtInfoTrailer(&sb, &ctx);
return Bufio_Flush(&sb);
}
static Sint64 Isolario_DumpRib(const Mrthdr *hdr,
const Mrtribent *rib,
void *streamp,
const StmOps *ops,
Bgpattrtab table)
{
assert(hdr->type == MRT_TABLE_DUMP);
Stmwrbuf sb;
Dumpfmtctx ctx;
RawPrefix pfx;
char buf[APPFX_STRLEN + 1];
char *ep;
Bufio_WrInit(&sb, streamp, ops);
memset(&ctx, 0, sizeof(ctx));
ctx.hasPeer = TRUE;
ctx.hasTimestamp = TRUE;
ctx.hdr = hdr;
const Bgpattrseg *tpa = RIB_GETATTRIBS(hdr->subtype, rib);
switch (hdr->subtype) {
case AFI_IP:
pfx.width = rib->v4.prefixLen;
pfx.v4 = rib->v4.prefix;
assert(pfx.width < IPV4_WIDTH);
ctx.timestamp = beswap32(rib->v4.originatedTime);
ctx.peerAddr.family = IP4;
ctx.peerAddr.v4 = rib->v4.peerAddr;
ctx.peerAs = beswap16(rib->v4.peerAs);
break;
case AFI_IP6:
pfx.width = rib->v6.prefixLen;
pfx.v6 = rib->v6.prefix;
assert(pfx.width < IPV6_WIDTH);
ctx.timestamp = beswap32(rib->v6.originatedTime);
ctx.peerAddr.family = IP6;
ctx.peerAddr.v6 = rib->v6.peerAddr;
ctx.peerAs = beswap16(rib->v6.peerAs);
break;
default:
UNREACHABLE;
break;
}
ep = Bgp_PrefixToString(hdr->subtype, &pfx, buf);
Bufio_Putc(&sb, RIB_MARKER);
Bufio_Putc(&sb, SEP_CHAR);
Bufio_Putsn(&sb, buf, ep - buf);
Bufio_Putc(&sb, SEP_CHAR);
DumpAttributes(&sb, tpa, table, &ctx);
Bufio_Putc(&sb, SEP_CHAR);
DumpMrtInfoTrailer(&sb, &ctx);
return Bufio_Flush(&sb);
}
static Sint64 Isolario_DumpBgp4mp(const Mrthdr *hdr,
void *streamp,
const StmOps *ops,
Bgpattrtab table)
{
assert(hdr->type == MRT_BGP4MP || hdr->type == MRT_BGP4MP_ET);
Stmwrbuf sb;
Dumpfmtctx ctx;
size_t offset; // offset to BGP4MP payload
size_t len;
const Bgp4mphdr *bgp4mp = BGP4MP_HDR(hdr);
Bufio_WrInit(&sb, streamp, ops);
len = beswap32(hdr->len);
memset(&ctx, 0, sizeof(ctx));
ctx.hasPeer = TRUE;
ctx.hasTimestamp = TRUE;
ctx.isAsn32bit = BGP4MP_ISASN32BIT(hdr->subtype);
ctx.isAddPath = BGP4MP_ISADDPATH(hdr->subtype);
ctx.timestamp = beswap32(hdr->timestamp);
if (hdr->type == MRT_BGP4MP_ET) {
// Length must account for extended timestamp
if (len < 4) goto corrupt;
ctx.microsecs = beswap32(((const Mrthdrex *) hdr)->microsecs);
len -= 4;
NormalizeExtendedTimestamp(&ctx);
}
ctx.hdr = hdr;
if (ctx.isAsn32bit) {
if (len < sizeof(bgp4mp->a32)) goto corrupt;
ctx.peerAs = beswap32(bgp4mp->a32.peerAs);
if (bgp4mp->a32.afi == AFI_IP) {
if (len < sizeof(bgp4mp->a32v4)) goto corrupt;
ctx.peerAddr.family = IP4;
ctx.peerAddr.v4 = bgp4mp->a32v4.peerAddr;
offset = sizeof(bgp4mp->a32v4);
} else {
assert(bgp4mp->a32.afi == AFI_IP6);
if (len < sizeof(bgp4mp->a32v6)) goto corrupt;
ctx.peerAddr.family = IP6;
ctx.peerAddr.v6 = bgp4mp->a32v6.peerAddr;
offset = sizeof(bgp4mp->a32v6);
}
} else {
if (len < sizeof(bgp4mp->a16)) goto corrupt;
ctx.peerAs = beswap16(bgp4mp->a16.peerAs);
if (bgp4mp->a16.afi == AFI_IP) {
if (len < sizeof(bgp4mp->a16v4)) goto corrupt;
ctx.peerAddr.family = IP4;
ctx.peerAddr.v4 = bgp4mp->a16v4.peerAddr;
offset = sizeof(bgp4mp->a16v4);
} else {
assert(bgp4mp->a16.afi == AFI_IP6);
if (len < sizeof(bgp4mp->a16v6)) goto corrupt;
ctx.peerAddr.family = IP6;
ctx.peerAddr.v6 = bgp4mp->a16v6.peerAddr;
offset = sizeof(bgp4mp->a16v6);
}
}
assert(len >= offset);
// Write contents
if (BGP4MP_ISSTATECHANGE(hdr->subtype)) {
// Dump state change
BgpFsmState chng[2];
Bufio_Putc(&sb, STATE_CHANGE_MARKER);
Bufio_Putc(&sb, SEP_CHAR);
if (len < offset + sizeof(chng)) goto corrupt;
memcpy(chng, (Uint8 *) bgp4mp + offset, sizeof(chng));
Bufio_Putu(&sb, beswap16(chng[0]));
Bufio_Putc(&sb, '-');
Bufio_Putu(&sb, beswap16(chng[1]));
Bufio_Putsn(&sb, SEPS_BUF, 7);
DumpMrtInfoTrailer(&sb, &ctx);
} else if (BGP4MP_ISMESSAGE(hdr->subtype)) {
// Wraps BGP message, wrapped message includes header and marker
const Bgphdr *msg = (const Bgphdr *) ((Uint8 *) bgp4mp + offset);
size_t nbytes = len - offset;
nbytes = Bgp_CheckMsgHdr(msg, nbytes, /*allowExtendedSize=*/TRUE);
if (nbytes == 0) {
// Corrupted BGP4MP with invalid BGP data
Bufio_Putc(&sb, UNKNOWN_MARKER);
Bufio_Putc(&sb, SEP_CHAR);
goto corrupt;
}
DumpBgp(&sb, msg->type, msg + 1, nbytes - BGP_HDRSIZ, table, &ctx);
} else {
// Deprecated/Unknown type
Bufio_Putc(&sb, UNKNOWN_MARKER);
Bufio_Putsn(&sb, SEPS_BUF, 9);
DumpMrtInfoTrailer(&sb, &ctx);
}
return Bufio_Flush(&sb);
corrupt:
WarnCorrupted(&sb, &ctx);
DumpMrtInfoTrailer(&sb, &ctx);
return Bufio_Flush(&sb);
}
static Sint64 Isolario_DumpZebra(const Mrthdr *hdr,
void *streamp,
const StmOps *ops,
Bgpattrtab table)
{
assert(hdr->type == MRT_BGP);
Stmwrbuf sb;
Dumpfmtctx ctx;
const Zebrahdr *zebra = ZEBRA_HDR(hdr);
Bufio_WrInit(&sb, streamp, ops);
memset(&ctx, 0, sizeof(ctx));
ctx.hasPeer = TRUE;
ctx.hasTimestamp = TRUE;
ctx.timestamp = beswap32(hdr->timestamp);
ctx.hdr = hdr;
ctx.peerAddr.family = IP4;
ctx.peerAddr.v4 = zebra->peerAddr;
if (hdr->subtype == ZEBRA_STATE_CHANGE) {
const Zebrastatchng *chng = (const Zebrastatchng *) zebra;
Bufio_Putc(&sb, STATE_CHANGE_MARKER);
Bufio_Putc(&sb, SEP_CHAR);
Bufio_Putu(&sb, beswap16(chng->oldState));
Bufio_Putc(&sb, '-');
Bufio_Putu(&sb, beswap16(chng->newState));
Bufio_Putsn(&sb, SEPS_BUF, 7);
DumpMrtInfoTrailer(&sb, &ctx);
} else if (ZEBRA_ISMESSAGE(hdr->subtype)) {
const Zebramsghdr *zebramsg = (const Zebramsghdr *) zebra;
size_t len = beswap32(hdr->len);
size_t offset = offsetof(Zebramsghdr, msg);
size_t nbytes = len - offset;
BgpType type;
switch (hdr->subtype) {
case ZEBRA_UPDATE: type = BGP_UPDATE; break;
case ZEBRA_OPEN: type = BGP_OPEN; break;
case ZEBRA_NOTIFY: type = BGP_NOTIFICATION; break;
case ZEBRA_KEEPALIVE: type = BGP_KEEPALIVE; break;
default:
UNREACHABLE;
return -1;
}
DumpBgp(&sb, type, zebramsg->msg, nbytes, table, &ctx);
} else {
// Unknown type
Bufio_Putc(&sb, UNKNOWN_MARKER);
Bufio_Putsn(&sb, SEPS_BUF, 9);
DumpMrtInfoTrailer(&sb, &ctx);
}
return Bufio_Flush(&sb);
}
static const BgpDumpfmt bgp_isolarioTable = {
Isolario_DumpMsg,
Isolario_DumpRibv2,
Isolario_DumpRib,
Isolario_DumpBgp4mp,
Isolario_DumpZebra
};
static const BgpDumpfmt bgp_isolarioTableWc = {
Isolario_DumpMsgWc,
Isolario_DumpRibv2,
Isolario_DumpRib,
Isolario_DumpBgp4mp,
Isolario_DumpZebra
};
const BgpDumpfmt *const Bgp_IsolarioFmt = &bgp_isolarioTable;
const BgpDumpfmt *const Bgp_IsolarioFmtWc = &bgp_isolarioTableWc;
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