static char *hop_tostr(const scamper_trace_t *trace, int i,
char *buf, size_t *len_out)
{
scamper_trace_hop_t *hop;
char addr[128];
size_t len = *len_out, off = 0;
if(i<trace->firsthop-1 || trace->hop_count <= i)
{
string_concat(buf, len, &off, "-");
goto done;
}
else if((hop = trace->hops[i]) == NULL)
{
string_concat(buf, len, &off, "*");
goto done;
}
if((options & OPT_NAMES) == 0 ||
addr_toname(hop->hop_addr, addr, sizeof(addr)) == NULL)
scamper_addr_tostr(hop->hop_addr, addr, sizeof(addr));
string_concat(buf, len, &off, "%s", addr);
if(SCAMPER_TRACE_HOP_IS_ICMP_TTL_EXP(hop) ||
SCAMPER_TRACE_HOP_IS_ICMP_ECHO_REPLY(hop) ||
SCAMPER_TRACE_HOP_IS_TCP(hop))
{
goto done;
}
if(hop->hop_addr->type == SCAMPER_ADDR_TYPE_IPV4)
{
if(hop->hop_icmp_type == ICMP_UNREACH)
{
if(hop->hop_icmp_code == ICMP_UNREACH_FILTER_PROHIB)
string_concat(buf, len, &off, " !X");
else if(hop->hop_icmp_code == ICMP_UNREACH_HOST)
string_concat(buf, len, &off, " !H");
else if(hop->hop_icmp_code == ICMP_UNREACH_NEEDFRAG)
string_concat(buf, len, &off, " !F");
else if(hop->hop_icmp_code == ICMP_UNREACH_SRCFAIL)
string_concat(buf, len, &off, " !S");
else if(hop->hop_icmp_code == ICMP_UNREACH_PROTOCOL)
string_concat(buf, len, &off, " !P");
else if(hop->hop_icmp_code == ICMP_UNREACH_NET)
string_concat(buf, len, &off, " !N");
else if(hop->hop_icmp_code != ICMP_UNREACH_PORT)
string_concat(buf, len, &off, " !<%d>", hop->hop_icmp_code);
}
else
{
string_concat(buf, len, &off,
" !<%d,%d>", hop->hop_icmp_type, hop->hop_icmp_code);
}
}
else if(hop->hop_addr->type == SCAMPER_ADDR_TYPE_IPV6)
{
if(hop->hop_icmp_type == ICMP6_DST_UNREACH)
{
if(hop->hop_icmp_code == ICMP6_DST_UNREACH_ADDR)
string_concat(buf, len, &off, " !A");
else if(hop->hop_icmp_code == ICMP6_DST_UNREACH_BEYONDSCOPE)
string_concat(buf, len, &off, " !S");
else if(hop->hop_icmp_code == ICMP6_DST_UNREACH_ADMIN)
string_concat(buf, len, &off, " !P");
else if(hop->hop_icmp_code == ICMP6_DST_UNREACH_NOROUTE)
string_concat(buf, len, &off, " !N");
else if(hop->hop_icmp_code != ICMP6_DST_UNREACH_NOPORT)
string_concat(buf, len, &off, " !<%d>", hop->hop_icmp_code);
}
else if(hop->hop_icmp_type == ICMP6_PACKET_TOO_BIG)
{
string_concat(buf, len, &off, " !F");
}
else
{
string_concat(buf, len, &off,
" !<%d,%d>", hop->hop_icmp_type, hop->hop_icmp_code);
}
}
done:
*len_out = off;
return buf;
}
static void warts_trace_hop_params(const scamper_trace_t *trace,
const scamper_trace_hop_t *hop,
warts_addrtable_t *table, uint8_t *flags,
uint16_t *flags_len, uint16_t *params_len)
{
scamper_icmpext_t *ie;
const warts_var_t *var;
int i, max_id = 0;
/* unset all the flags possible */
memset(flags, 0, hop_vars_mfb);
*params_len = 0;
for(i=0; i<sizeof(hop_vars)/sizeof(warts_var_t); i++)
{
var = &hop_vars[i];
/* not used any more */
if(var->id == WARTS_TRACE_HOP_ADDR_GID)
continue;
if(var->id == WARTS_TRACE_HOP_ADDR)
{
if(hop->hop_addr == NULL)
continue;
}
else if(var->id == WARTS_TRACE_HOP_TCP_FLAGS)
{
if(SCAMPER_TRACE_HOP_IS_TCP(hop) == 0)
continue;
}
else if(var->id == WARTS_TRACE_HOP_ICMP_TC)
{
if(SCAMPER_TRACE_HOP_IS_ICMP(hop) == 0)
continue;
}
else if(var->id == WARTS_TRACE_HOP_Q_IPLEN)
{
if(SCAMPER_TRACE_HOP_IS_ICMP_Q(hop) == 0)
continue;
if(hop->hop_icmp_q_ipl == trace->probe_size)
continue;
}
else if(var->id == WARTS_TRACE_HOP_Q_IPTTL)
{
if(SCAMPER_TRACE_HOP_IS_ICMP_Q(hop) == 0)
continue;
if(hop->hop_icmp_q_ttl == 1)
continue;
}
else if(var->id == WARTS_TRACE_HOP_Q_IPTOS)
{
if(SCAMPER_TRACE_HOP_IS_ICMP_Q(hop) == 0)
continue;
if(hop->hop_addr->type != SCAMPER_ADDR_TYPE_IPV4)
continue;
}
else if(var->id == WARTS_TRACE_HOP_NHMTU)
{
if(SCAMPER_TRACE_HOP_IS_ICMP_PTB(hop) == 0)
continue;
}
else if(var->id == WARTS_TRACE_HOP_ICMPEXT)
{
if(hop->hop_icmpext == NULL)
continue;
}
else if(var->id == WARTS_TRACE_HOP_REPLY_IPID)
{
if(hop->hop_reply_ipid == 0)
continue;
}
else if(var->id == WARTS_TRACE_HOP_TX)
{
if(hop->hop_tx.tv_sec == 0)
continue;
}
flag_set(flags, var->id, &max_id);
if(var->id == WARTS_TRACE_HOP_ADDR)
{
*params_len += warts_addr_size(table, hop->hop_addr);
}
else if(var->id == WARTS_TRACE_HOP_ICMPEXT)
{
*params_len += 2;
for(ie = hop->hop_icmpext; ie != NULL; ie = ie->ie_next)
*params_len += (2 + 1 + 1 + ie->ie_dl);
}
else
{
assert(var->size >= 0);
*params_len += var->size;
}
}
*flags_len = fold_flags(flags, max_id);
return;
}
