static void warts_trace_pmtud_write(const scamper_trace_t *trace,
uint8_t *buf, uint32_t *off, uint32_t len,
warts_trace_pmtud_t *state,
warts_addrtable_t *table)
{
warts_param_writer_t handlers[] = {
{&trace->pmtud->ifmtu, (wpw_t)insert_uint16, NULL},
{&trace->pmtud->pmtu, (wpw_t)insert_uint16, NULL},
{&trace->pmtud->outmtu, (wpw_t)insert_uint16, NULL},
{&trace->pmtud->ver, (wpw_t)insert_byte, NULL},
{&trace->pmtud->notec, (wpw_t)insert_byte, NULL},
};
const int handler_cnt = sizeof(handlers)/sizeof(warts_param_writer_t);
uint16_t u16;
uint8_t u8;
warts_params_write(buf, off, len, state->flags, state->flags_len,
state->params_len, handlers, handler_cnt);
/* write the number of hop records */
insert_uint16(buf, off, len, &state->hopc, NULL);
/* write the hop records */
for(u16=0; u16<state->hopc; u16++)
warts_trace_hop_write(&state->hops[u16], table, buf, off, len);
/* write the notes */
for(u8=0; u8<trace->pmtud->notec; u8++)
warts_trace_pmtud_n_write(trace->pmtud->notes[u8], buf, off, len,
&state->notes[u8]);
return;
}
static void insert_dealias_prefixscan_xs(uint8_t *buf, uint32_t *off,
const uint32_t len,
const scamper_dealias_prefixscan_t *p,
void *param)
{
uint16_t i;
i = htons(p->xc);
insert_uint16(buf, off, len, &i, NULL);
for(i=0; i<p->xc; i++)
insert_addr(buf, off, len, p->xs[i], param);
return;
}
int scamper_file_warts_ping_write(const scamper_file_t *sf,
const scamper_ping_t *ping)
{
warts_addrtable_t table;
warts_ping_reply_t *reply_state = NULL;
scamper_ping_reply_t *reply;
uint8_t *buf = NULL;
uint8_t flags[ping_vars_mfb];
uint16_t flags_len, params_len;
uint32_t len, off = 0;
uint16_t reply_count;
size_t size;
int i, j;
memset(&table, 0, sizeof(table));
/* figure out which ping data items we'll store in this record */
warts_ping_params(ping, &table, flags, &flags_len, ¶ms_len);
/* length of the ping's flags, parameters, and number of reply records */
len = 8 + flags_len + 2 + params_len + 2;
if((reply_count = scamper_ping_reply_count(ping)) > 0)
{
size = reply_count * sizeof(warts_ping_reply_t);
if((reply_state = (warts_ping_reply_t *)malloc_zero(size)) == NULL)
{
goto err;
}
for(i=0, j=0; i<ping->ping_sent; i++)
{
for(reply=ping->ping_replies[i]; reply != NULL; reply = reply->next)
{
if(warts_ping_reply_state(sf, ping, reply, &reply_state[j++],
&table, &len) == -1)
{
goto err;
}
}
}
}
if((buf = malloc(len)) == NULL)
{
goto err;
}
insert_wartshdr(buf, &off, len, SCAMPER_FILE_OBJ_PING);
if(warts_ping_params_write(ping, sf, &table, buf, &off, len,
flags, flags_len, params_len) == -1)
{
goto err;
}
/* reply record count */
insert_uint16(buf, &off, len, &reply_count, NULL);
/* write each ping reply record */
for(i=0; i<reply_count; i++)
{
warts_ping_reply_write(&reply_state[i], &table, buf, &off, len);
}
if(reply_state != NULL)
{
free(reply_state);
reply_state = NULL;
}
assert(off == len);
if(warts_write(sf, buf, len) == -1)
{
goto err;
}
warts_addrtable_clean(&table);
free(buf);
return 0;
err:
warts_addrtable_clean(&table);
if(reply_state != NULL) free(reply_state);
if(buf != NULL) free(buf);
return -1;
}
int scamper_file_warts_trace_write(const scamper_file_t *sf,
const scamper_trace_t *trace)
{
scamper_trace_hop_t *hop;
uint8_t *buf = NULL;
uint8_t trace_flags[trace_vars_mfb];
uint16_t trace_flags_len, trace_params_len;
warts_trace_hop_t *hop_state = NULL;
uint16_t hop_recs;
warts_trace_pmtud_t *pmtud = NULL;
warts_trace_hop_t *ld_state = NULL;
uint16_t ld_recs = 0;
uint32_t ld_len = 0;
warts_trace_dtree_t dtree_state;
uint16_t u16;
uint8_t u8;
uint32_t off = 0, len, len2;
size_t size;
int i, j;
warts_addrtable_t *table = NULL;
memset(&dtree_state, 0, sizeof(dtree_state));
if((table = warts_addrtable_alloc_byaddr()) == NULL)
goto err;
/* figure out which trace data items we'll store in this record */
warts_trace_params(trace, table,
trace_flags, &trace_flags_len, &trace_params_len);
/*
* this represents the length of the trace's flags and parameters, and the
* 2-byte field that records the number of hop records that follow
*/
len = 8 + trace_flags_len + trace_params_len + 2;
if(trace_params_len != 0) len += 2;
/* for each hop, figure out what is going to be stored in this record */
if((hop_recs = scamper_trace_hop_count(trace)) > 0)
{
size = hop_recs * sizeof(warts_trace_hop_t);
if((hop_state = (warts_trace_hop_t *)malloc_zero(size)) == NULL)
{
goto err;
}
for(i=0, j=0; i<trace->hop_count; i++)
{
for(hop = trace->hops[i]; hop != NULL; hop = hop->hop_next)
{
/* record basic hop state */
len2 = len;
warts_trace_hop_state(trace,hop,&hop_state[j++],table,&len2);
if(len2 < len)
goto err;
len = len2;
}
}
}
/* figure out how much space we need for PMTUD data, if we have it */
if(trace->pmtud != NULL)
{
if((pmtud = malloc_zero(sizeof(warts_trace_pmtud_t))) == NULL)
goto err;
if(warts_trace_pmtud_state(trace, pmtud, table) != 0)
goto err;
len += (2 + pmtud->len); /* 2 = size of attribute header */
}
if(trace->lastditch != NULL)
{
/* count the number of last-ditch hop records */
ld_recs = scamper_trace_lastditch_hop_count(trace);
/* allocate an array of hop state structs for the lastditch hops */
size = ld_recs * sizeof(warts_trace_hop_t);
if((ld_state = (warts_trace_hop_t *)malloc_zero(size)) == NULL)
goto err;
/* need to record count of lastditch hops and a single zero flags byte */
ld_len = 3;
/* record hop state for each lastditch reply */
for(hop = trace->lastditch, j=0; hop != NULL; hop = hop->hop_next)
warts_trace_hop_state(trace, hop, &ld_state[j++], table, &ld_len);
len += (2 + ld_len); /* 2 = size of attribute header */
}
if(trace->dtree != NULL)
{
/* figure out what the structure of the dtree header looks like */
if(warts_trace_dtree_params(sf, trace, table, &dtree_state) != 0)
goto err;
/* 2 = size of attribute header */
len += (2 + dtree_state.len);
}
len += 2; /* EOF */
if((buf = malloc_zero(len)) == NULL)
{
goto err;
}
insert_wartshdr(buf, &off, len, SCAMPER_FILE_OBJ_TRACE);
/* write trace parameters */
if(warts_trace_params_write(trace, sf, table, buf, &off, len, trace_flags,
trace_flags_len, trace_params_len) == -1)
{
goto err;
}
/* hop record count */
insert_uint16(buf, &off, len, &hop_recs, NULL);
/* write each traceroute hop record */
for(i=0; i<hop_recs; i++)
warts_trace_hop_write(&hop_state[i], table, buf, &off, len);
if(hop_state != NULL)
free(hop_state);
hop_state = NULL;
/* write the PMTUD data */
if(pmtud != NULL)
{
/* write the attribute header */
u16 = WARTS_TRACE_ATTR_HDR(WARTS_TRACE_ATTR_PMTUD, pmtud->len);
insert_uint16(buf, &off, len, &u16, NULL);
/* write details of the pmtud measurement */
warts_trace_pmtud_write(trace, buf, &off, len, pmtud, table);
warts_trace_pmtud_free(pmtud);
pmtud = NULL;
}
/* write the last-ditch data */
if(trace->lastditch != NULL)
{
/* write the attribute header */
u16 = WARTS_TRACE_ATTR_HDR(WARTS_TRACE_ATTR_LASTDITCH, ld_len);
insert_uint16(buf, &off, len, &u16, NULL);
/* write the last-ditch flags: currently zero */
u8 = 0;
insert_byte(buf, &off, len, &u8, NULL);
/* write the number of hop records */
insert_uint16(buf, &off, len, &ld_recs, NULL);
for(i=0; i<ld_recs; i++)
warts_trace_hop_write(&ld_state[i], table, buf, &off, len);
free(ld_state);
ld_state = NULL;
}
/* write doubletree data */
if(trace->dtree != NULL)
{
u16 = WARTS_TRACE_ATTR_HDR(WARTS_TRACE_ATTR_DTREE, dtree_state.len);
insert_uint16(buf, &off, len, &u16, NULL);
/* write details of the pmtud measurement */
warts_trace_dtree_write(trace, table, buf, &off, len, &dtree_state);
}
/* write the end of trace attributes header */
u16 = WARTS_TRACE_ATTR_EOF;
insert_uint16(buf, &off, len, &u16, NULL);
assert(off == len);
if(warts_write(sf, buf, len) == -1)
{
goto err;
}
warts_addrtable_free(table);
free(buf);
return 0;
err:
if(table != NULL) warts_addrtable_free(table);
if(buf != NULL) free(buf);
if(hop_state != NULL) free(hop_state);
if(pmtud != NULL) warts_trace_pmtud_free(pmtud);
if(ld_state != NULL) free(ld_state);
return -1;
}
/* Write data from a scamper tbit object to a warts file */
int scamper_file_warts_tbit_write(const scamper_file_t *sf,
const scamper_tbit_t *tbit)
{
warts_addrtable_t table;
warts_tbit_pkt_t *pkts = NULL;
warts_tbit_pmtud_t pmtud;
warts_tbit_null_t null;
warts_tbit_app_http_t http;
uint8_t *buf = NULL;
uint8_t flags[tbit_vars_mfb];
uint16_t junk16;
uint16_t flags_len, params_len;
uint32_t len, i, off = 0;
size_t size;
memset(&table, 0, sizeof(table));
/* Set the tbit data (not including the packets) */
warts_tbit_params(tbit, &table, flags, &flags_len, ¶ms_len);
len = 8 + flags_len + params_len + 2;
if(tbit->pktc > 0)
{
/* Allocate memory for the state */
size = tbit->pktc * sizeof(warts_tbit_pkt_t);
if((pkts = (warts_tbit_pkt_t *)malloc_zero(size)) == NULL)
goto err;
for(i=0; i<tbit->pktc; i++)
warts_tbit_pkt_params(tbit->pkts[i], &pkts[i], &len);
}
if(tbit->data != NULL)
{
switch(tbit->type)
{
case SCAMPER_TBIT_TYPE_PMTUD:
warts_tbit_pmtud_params(tbit, &table, &pmtud);
len += (2 + 4 + pmtud.len);
break;
case SCAMPER_TBIT_TYPE_NULL:
warts_tbit_null_params(tbit, &null);
len += (2 + 4 + null.len);
break;
default:
goto err;
}
}
if(tbit->app_data != NULL)
{
if(tbit->app_proto == SCAMPER_TBIT_APP_HTTP)
{
warts_tbit_app_http_params(tbit, &http);
len += (2 + 4 + http.len);
}
else goto err;
}
/* struct eof */
len += 2;
/* Allocate memory to store all of the data (including packets) */
if((buf = malloc(len)) == NULL)
goto err;
insert_wartshdr(buf, &off, len, SCAMPER_FILE_OBJ_TBIT);
/* Write the tbit data (excluding packets) to the buffer */
if(warts_tbit_params_write(tbit, sf, &table, buf, &off, len,
flags, flags_len, params_len) != 0)
{
goto err;
}
if(tbit->pktc > 0)
{
for(i=0; i<tbit->pktc; i++)
warts_tbit_pkt_write(tbit->pkts[i], sf, buf, &off, len, &pkts[i]);
free(pkts); pkts = NULL;
}
if(tbit->data != NULL)
{
junk16 = WARTS_TBIT_STRUCT_TYPE;
insert_uint16(buf, &off, len, &junk16, NULL);
switch(tbit->type)
{
case SCAMPER_TBIT_TYPE_PMTUD:
insert_uint32(buf, &off, len, &pmtud.len, NULL);
warts_tbit_pmtud_write(tbit, buf, &off, len, &table, &pmtud);
break;
case SCAMPER_TBIT_TYPE_NULL:
insert_uint32(buf, &off, len, &null.len, NULL);
warts_tbit_null_write(tbit, buf, &off, len, &null);
break;
default:
goto err;
}
}
if(tbit->app_data != NULL)
{
junk16 = WARTS_TBIT_STRUCT_APP;
insert_uint16(buf, &off, len, &junk16, NULL);
if(tbit->app_proto == SCAMPER_TBIT_APP_HTTP)
{
insert_uint32(buf, &off, len, &http.len, NULL);
warts_tbit_app_http_write(tbit, buf, &off, len, &http);
}
else goto err;
}
junk16 = WARTS_TBIT_STRUCT_EOF;
insert_uint16(buf, &off, len, &junk16, NULL);
assert(off == len);
/* Write the whole buffer to a warts file */
if(warts_write(sf, buf, len) == -1)
goto err;
warts_addrtable_clean(&table);
free(buf);
return 0;
err:
warts_addrtable_clean(&table);
if(pkts != NULL) free(pkts);
if(buf != NULL) free(buf);
return -1;
}