dtn_endpoint_id_t *
parse_eid(dtn_handle_t handle, dtn_endpoint_id_t* eid, char * str)
{
// try the string as an actual dtn eid
if (!dtn_parse_eid_string(eid, str)) {
if (verbose)
fprintf(info, "%s (literal)\n", str);
return eid;
} else if (!dtn_build_local_eid(handle, eid, str)) {
// build a local eid based on the configuration of our dtn
// router plus the str as demux string
if (verbose) fprintf(info, "%s (local)\n", str);
return eid;
} else {
fprintf(stderr, "invalid eid string '%s'\n", str);
exit(EXIT_FAILURE);
}
}
dtn_endpoint_id_t * parse_eid(dtn_handle_t handle,
dtn_endpoint_id_t * eid, char * str)
{
// try the string as an actual dtn eid
if (!dtn_parse_eid_string(eid, str))
{
return eid;
}
// build a local eid based on the configuration of our dtn
// router plus the str as demux string
else if (!dtn_build_local_eid(handle, eid, str))
{
return eid;
}
else
{
fprintf(stderr, "invalid endpoint id string '%s'\n", str);
exit(1);
}
}
int
main(int argc, const char** argv)
{
int i;
int ret;
dtn_handle_t handle;
dtn_endpoint_id_t source_eid;
dtn_reg_info_t reginfo;
dtn_reg_id_t regid;
dtn_bundle_spec_t ping_spec;
dtn_bundle_spec_t reply_spec;
dtn_bundle_payload_t ping_payload;
ping_payload_t payload_contents;
ping_payload_t recv_contents;
dtn_bundle_payload_t reply_payload;
dtn_bundle_status_report_t* sr_data;
dtn_bundle_id_t bundle_id;
int debug = 1;
char demux[64];
int dest_len = 0;
struct timeval send_times[MAX_PINGS_IN_FLIGHT];
dtn_timestamp_t creation_times[MAX_PINGS_IN_FLIGHT];
struct timeval now, recv_start, recv_end;
u_int32_t nonce;
u_int32_t seqno = 0;
int timeout;
// force stdout to always be line buffered, even if output is
// redirected to a pipe or file
setvbuf(stdout, (char *)NULL, _IOLBF, 0);
doOptions(argc, argv);
memset(&ping_spec, 0, sizeof(ping_spec));
gettimeofday(&now, 0);
srand(now.tv_sec);
nonce = rand();
// open the ipc handle
int err = dtn_open(&handle);
if (err != DTN_SUCCESS) {
fprintf(stderr, "fatal error opening dtn handle: %s\n",
dtn_strerror(err));
exit(1);
}
// make sure they supplied a valid destination eid or
// "localhost", in which case we just use the local daemon
if (strcmp(dest_eid_str, "localhost") == 0) {
dtn_build_local_eid(handle, &ping_spec.dest, "ping");
} else {
if (dtn_parse_eid_string(&ping_spec.dest, dest_eid_str)) {
fprintf(stderr, "invalid destination eid string '%s'\n",
dest_eid_str);
exit(1);
}
}
dest_len = strlen(ping_spec.dest.uri);
if ((dest_len < 4) ||
(strcmp(ping_spec.dest.uri + dest_len - 4, "ping") != 0))
{
fprintf(stderr, "\nWARNING: ping destination does not end in \"ping\"\n\n");
}
// if the user specified a source eid, register on it.
// otherwise, build a local eid based on the configuration of
// our dtn router plus the demux string
snprintf(demux, sizeof(demux), "/ping.%d", getpid());
if (source_eid_str[0] != '\0') {
if (dtn_parse_eid_string(&source_eid, source_eid_str)) {
fprintf(stderr, "invalid source eid string '%s'\n",
source_eid_str);
exit(1);
}
} else {
dtn_build_local_eid(handle, &source_eid, demux);
}
// set the source and replyto eids in the bundle spec
if (debug) printf("source_eid [%s]\n", source_eid.uri);
dtn_copy_eid(&ping_spec.source, &source_eid);
dtn_copy_eid(&ping_spec.replyto, &source_eid);
// now create a new registration based on the source
memset(®info, 0, sizeof(reginfo));
dtn_copy_eid(®info.endpoint, &source_eid);
reginfo.flags = DTN_REG_DEFER;
reginfo.regid = DTN_REGID_NONE;
reginfo.expiration = 0;
if ((ret = dtn_register(handle, ®info, ®id)) != 0) {
fprintf(stderr, "error creating registration: %d (%s)\n",
ret, dtn_strerror(dtn_errno(handle)));
exit(1);
}
if (debug) printf("dtn_register succeeded, regid %d\n", regid);
// set the expiration time and request deletion status reports
ping_spec.expiration = expiration;
ping_spec.dopts = DOPTS_DELETE_RCPT;
printf("PING [%s] (expiration %u)...\n", ping_spec.dest.uri, expiration);
if (interval == 0) {
printf("WARNING: zero second interval will result in flooding pings!!\n");
}
// loop, sending pings and polling for activity
for (i = 0; count == 0 || i < count; ++i) {
gettimeofday(&send_times[seqno], NULL);
// fill in a short payload string, a nonce, and a sequence number
// to verify the echo feature and make sure we're not getting
// duplicate responses or ping responses from another app
memcpy(&payload_contents.ping, PING_STR, 8);
payload_contents.seqno = seqno;
payload_contents.nonce = nonce;
payload_contents.time = send_times[seqno].tv_sec;
memset(&ping_payload, 0, sizeof(ping_payload));
dtn_set_payload(&ping_payload, DTN_PAYLOAD_MEM,
(char*)&payload_contents, sizeof(payload_contents));
memset(&bundle_id, 0, sizeof(bundle_id));
if ((ret = dtn_send(handle, regid, &ping_spec, &ping_payload,
&bundle_id)) != 0) {
fprintf(stderr, "error sending bundle: %d (%s)\n",
ret, dtn_strerror(dtn_errno(handle)));
exit(1);
}
creation_times[seqno] = bundle_id.creation_ts;
memset(&reply_spec, 0, sizeof(reply_spec));
memset(&reply_payload, 0, sizeof(reply_payload));
// now loop waiting for replies / status reports until it's
// time to send again, adding twice the expiration time if we
// just sent the last ping
timeout = interval * 1000;
if (i == count - 1)
timeout += expiration * 2000;
do {
gettimeofday(&recv_start, 0);
if ((ret = dtn_recv(handle, &reply_spec,
DTN_PAYLOAD_MEM, &reply_payload, timeout)) < 0)
{
if (dtn_errno(handle) == DTN_ETIMEOUT) {
break; // time to send again
}
fprintf(stderr, "error getting ping reply: %d (%s)\n",
ret, dtn_strerror(dtn_errno(handle)));
exit(1);
}
gettimeofday(&recv_end, 0);
if (reply_payload.status_report != NULL)
{
sr_data = reply_payload.status_report;
if (sr_data->flags != STATUS_DELETED) {
fprintf(stderr, "(bad status report from %s: flags 0x%x)\n",
reply_spec.source.uri, sr_data->flags);
goto next;
}
// find the seqno corresponding to the original
// transmission time in the status report
int j = 0;
for (j = 0; j < MAX_PINGS_IN_FLIGHT; ++j) {
if (creation_times[j].secs ==
sr_data->bundle_id.creation_ts.secs &&
creation_times[j].seqno ==
sr_data->bundle_id.creation_ts.seqno)
{
printf("bundle deleted at [%s] (%s): seqno=%d, time=%ld ms\n",
reply_spec.source.uri,
dtn_status_report_reason_to_str(sr_data->reason),
j, TIMEVAL_DIFF_MSEC(recv_end, send_times[j]));
goto next;
}
}
printf("bundle deleted at [%s] (%s): ERROR: can't find seqno\n",
reply_spec.source.uri,
dtn_status_report_reason_to_str(sr_data->reason));
}
else {
if (reply_payload.buf.buf_len != sizeof(ping_payload_t))
{
printf("%d bytes from [%s]: ERROR: length != %zu\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
sizeof(ping_payload_t));
goto next;
}
memcpy(&recv_contents, reply_payload.buf.buf_val,
sizeof(recv_contents));
if (recv_contents.seqno > MAX_PINGS_IN_FLIGHT)
{
printf("%d bytes from [%s]: ERROR: invalid seqno %d\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
recv_contents.seqno);
goto next;
}
if (recv_contents.nonce != nonce)
{
printf("%d bytes from [%s]: ERROR: invalid nonce %u != %u\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
recv_contents.nonce, nonce);
goto next;
}
if (recv_contents.time != (u_int32_t)send_times[recv_contents.seqno].tv_sec)
{
printf("%d bytes from [%s]: ERROR: time mismatch -- "
"seqno %u reply time %u != send time %lu\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
recv_contents.seqno,
recv_contents.time,
(long unsigned int)send_times[recv_contents.seqno].tv_sec);
goto next;
}
printf("%d bytes from [%s]: '%.*s' seqno=%d, time=%ld ms\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
(u_int)strlen(PING_STR),
reply_payload.buf.buf_val,
recv_contents.seqno,
TIMEVAL_DIFF_MSEC(recv_end,
send_times[recv_contents.seqno]));
fflush(stdout);
}
next:
dtn_free_payload(&reply_payload);
timeout -= TIMEVAL_DIFF_MSEC(recv_end, recv_start);
// once we get status from all the pings we're supposed to
// send, we're done
reply_count++;
if (count != 0 && reply_count == count) {
break;
}
} while (timeout > 0);
seqno++;
seqno %= MAX_PINGS_IN_FLIGHT;
}
dtn_close(handle);
return 0;
}
int
main(int argc, char** argv)
{
int i, errs;
int ret;
dtn_handle_t handle;
dtn_endpoint_id_t local_eid;
dtn_reg_info_t reginfo;
dtn_bundle_spec_t spec;
dtn_bundle_payload_t payload;
int call_bind;
time_t now;
// force stdout to always be line buffered, even if output is
// redirected to a pipe or file
setvbuf(stdout, (char *)NULL, _IOLBF, 0);
progname = argv[0];
parse_options(argc, argv);
printf("dtnsink starting up -- waiting for %u bundles\n", count);
// open the ipc handle
if (verbose) printf("opening connection to dtn router...\n");
int err = dtn_open(&handle);
if (err != DTN_SUCCESS) {
fprintf(stderr, "fatal error opening dtn handle: %s\n",
dtn_strerror(err));
exit(1);
}
if (verbose) printf("opened connection to dtn router...\n");
// if we're not given a regid, or we're in change mode, we need to
// build up the reginfo
memset(®info, 0, sizeof(reginfo));
if ((regid == DTN_REGID_NONE) || change)
{
// if the specified eid starts with '/', then build a local
// eid based on the configuration of our dtn router plus the
// demux string. otherwise make sure it's a valid one
if (endpoint[0] == '/') {
if (verbose) printf("calling dtn_build_local_eid.\n");
dtn_build_local_eid(handle, &local_eid, (char *) endpoint);
if (verbose) printf("local_eid [%s]\n", local_eid.uri);
} else {
if (verbose) printf("calling parse_eid_string\n");
if (dtn_parse_eid_string(&local_eid, endpoint)) {
fprintf(stderr, "invalid destination endpoint '%s'\n",
endpoint);
goto err;
}
}
// create a new registration based on this eid
dtn_copy_eid(®info.endpoint, &local_eid);
reginfo.regid = regid;
reginfo.expiration = expiration;
reginfo.flags = failure_action;
reginfo.script.script_val = failure_script;
reginfo.script.script_len = strlen(failure_script) + 1;
}
if (change) {
if ((ret = dtn_change_registration(handle, regid, ®info)) != 0) {
fprintf(stderr, "error changing registration: %d (%s)\n",
ret, dtn_strerror(dtn_errno(handle)));
goto err;
}
printf("change registration succeeded, regid %d\n", regid);
goto done;
}
if (unregister) {
if (dtn_unregister(handle, regid) != 0) {
fprintf(stderr, "error in unregister regid %d: %s\n",
regid, dtn_strerror(dtn_errno(handle)));
goto err;
}
printf("unregister succeeded, regid %d\n", regid);
goto done;
}
// try to see if there is an existing registration that matches
// the given endpoint, in which case we'll use that one.
if (regid == DTN_REGID_NONE && ! no_find_reg) {
if (dtn_find_registration(handle, &local_eid, ®id) != 0) {
if (dtn_errno(handle) != DTN_ENOTFOUND) {
fprintf(stderr, "error in find_registration: %s\n",
dtn_strerror(dtn_errno(handle)));
goto err;
}
}
printf("find registration succeeded, regid %d\n", regid);
call_bind = 1;
}
// if the user didn't give us a registration to use, get a new one
if (regid == DTN_REGID_NONE) {
if ((ret = dtn_register(handle, ®info, ®id)) != 0) {
fprintf(stderr, "error creating registration: %d (%s)\n",
ret, dtn_strerror(dtn_errno(handle)));
goto err;
}
printf("register succeeded, regid %d\n", regid);
call_bind = 0;
} else {
call_bind = 1;
}
if (register_only) {
goto done;
}
if (call_bind) {
// bind the current handle to the found registration
printf("binding to regid %d\n", regid);
if (dtn_bind(handle, regid) != 0) {
fprintf(stderr, "error binding to registration: %s\n",
dtn_strerror(dtn_errno(handle)));
goto err;
}
}
// keep track of what we've seen
char *received = (char *)malloc(count + 1);
memset(received, '\0', count);
// loop waiting for bundles
fprintf(stderr, "waiting %d seconds for first bundle...\n",
(MAX_STARTUP_TRIES)*RECV_TIMEOUT/1000);
for (i = 1; i <= count; ++i) {
int tries;
uint32_t which;
uint32_t size;
memset(&spec, 0, sizeof(spec));
memset(&payload, 0, sizeof(payload));
/*
* this is a little tricky. We want dtn_recv to time out after
* RECV_TIMEOUT ms, so we don't wait a long time for a bundle
* if something is broken and no bundle is coming. But we
* want to be friendly and wait patiently for the first
* bundle, in case dtnsource is slow in getting off the mark.
*
* So we loop at most MAX_STARTUP_TRIES times
*/
tries = 0;
while ((ret = dtn_recv(handle, &spec, bundletype, &payload,
RECV_TIMEOUT)) < 0) {
/* if waiting for the first bundle and we timed out be patient */
if (dtn_errno(handle) == DTN_ETIMEOUT) {
if (i == 1 && ++tries < MAX_STARTUP_TRIES) {
fprintf(stderr, "waiting %d seconds for first bundle...\n",
(MAX_STARTUP_TRIES-tries)*RECV_TIMEOUT/1000);
} else {
/* timed out waiting, something got dropped */
fprintf(stderr, "timeout waiting for bundle %d\n", i);
goto bail;
}
} else {
/* a bad thing has happend in recv, or we've lost patience */
fprintf(stderr, "error in dtn_recv: %d (%d, %s)\n", ret,
dtn_errno(handle), dtn_strerror(dtn_errno(handle)));
goto bail;
}
}
if (i == 1) {
now = time(0);
printf("received first bundle at %s\n", ctime(&now));
}
if (verbose) {
printf("bundle %d received successfully: id %s,%llu.%llu\n",
i,
spec.source.uri,
spec.creation_ts.secs,
spec.creation_ts.seqno);
}
if (!promiscuous) {
/* check to see which bundle this is */
// Files need to be handled differently than memory transfers
if (payload.location == DTN_PAYLOAD_FILE) {
if (handle_file_transfer(payload, &size, &which) < 0) {
dtn_free_payload(&payload);
continue;
}
} else {
which = ntohl(*(uint32_t *)payload.buf.buf_val);
size = payload.buf.buf_len;
}
if (which > (uint32_t) count) {
// note that the above cast is safe as count always >= 0
fprintf(stderr, "-- expecting %d bundles, saw bundle %u\n",
count, which);
}
else if (which <= 0) { /* because I am paranoid -DJE */
fprintf(stderr, "-- didn't expect bundle %u\n", which);
}
else {
++received[which];
}
}
// XXX should verify size here...
/* all done, get next one */
dtn_free_payload(&payload);
}
bail:
for (i = 1; i <= count; ++i) {
if (received[i] == 0) {
int j = i + 1;
while (j <= count && received[j] == 0)
++j;
if (j == i + 1)
printf("bundle %d: dropped\n", i);
else
printf("bundles %d-%d dropped\n", i, j - 1);
errs += (j - i);
i += (j - i - 1);
} else if (received[i] > 1) {
printf("bundle %d: received %d copies\n", i, received[i]);
++errs;
}
}
if (errs == 0) {
printf("all %d bundles received correctly\n", count);
}
free(received);
now = time(0);
printf("terminating at %s\n", ctime(&now));
done:
dtn_close(handle);
return 0;
err:
dtn_close(handle);
return 1;
}
int
main(int argc, const char** argv)
{
int ret;
dtn_handle_t handle;
dtn_endpoint_id_t source_eid;
dtn_endpoint_id_t replyto_eid;
dtn_reg_info_t reginfo;
dtn_reg_id_t regid;
dtn_bundle_spec_t ping_spec;
dtn_bundle_spec_t reply_spec;
dtn_bundle_payload_t ping_payload;
ping_payload_t payload_contents;
ping_payload_t recv_contents;
dtn_bundle_payload_t reply_payload;
dtn_bundle_status_report_t* sr_data;
dtn_bundle_id_t bundle_id;
int debug = 1;
char demux[64];
int dest_len = 0;
struct timeval send_time, now;
u_int32_t nonce;
int done;
time_t clock;
struct tm* tm_buf;
// force stdout to always be line buffered, even if output is
// redirected to a pipe or file
setvbuf(stdout, (char *)NULL, _IOLBF, 0);
doOptions(argc, argv);
memset(&ping_spec, 0, sizeof(ping_spec));
gettimeofday(&now, 0);
srand(now.tv_sec);
nonce = rand();
// open the ipc handle
int err = 0;
if (api_IP_set) err = dtn_open_with_IP(api_IP,api_port,&handle);
else err = dtn_open(&handle);
if (err != DTN_SUCCESS) {
fprintf(stderr, "fatal error opening dtn handle: %s\n",
dtn_strerror(err));
exit(1);
}
// make sure they supplied a valid destination eid or
// "localhost", in which case we just use the local daemon
if (strcmp(dest_eid_str, "localhost") == 0) {
dtn_build_local_eid(handle, &ping_spec.dest, "ping");
} else {
if (dtn_parse_eid_string(&ping_spec.dest, dest_eid_str)) {
fprintf(stderr, "invalid destination eid string '%s'\n",
dest_eid_str);
exit(1);
}
}
dest_len = strlen(ping_spec.dest.uri);
if ((dest_len < 4) ||
(strcmp(ping_spec.dest.uri + dest_len - 4, "ping") != 0))
{
fprintf(stderr, "\nWARNING: ping destination does not end in \"ping\"\n\n");
}
// if the user specified a source eid, register on it.
// otherwise, build a local eid based on the configuration of
// our dtn router plus the demux string
snprintf(demux, sizeof(demux), "/traceroute.%d", getpid());
if (source_eid_str[0] != '\0') {
if (dtn_parse_eid_string(&source_eid, source_eid_str)) {
fprintf(stderr, "invalid source eid string '%s'\n",
source_eid_str);
exit(1);
}
} else {
dtn_build_local_eid(handle, &source_eid, demux);
}
if (debug) printf("source_eid [%s]\n", source_eid.uri);
dtn_copy_eid(&ping_spec.source, &source_eid);
// Make the replyto EID
if ( replyto_eid_str[0]!=0 ) {
if (dtn_parse_eid_string(&replyto_eid, replyto_eid_str)) {
fprintf(stderr, "invalid replyto eid string '%s'\n",
replyto_eid_str);
exit(1);
}
dtn_copy_eid(&ping_spec.replyto, &replyto_eid);
printf("using user-supplied replyto\n");
} else {
dtn_copy_eid(&ping_spec.replyto, &source_eid);
printf("using default replyto\n");
}
// now create a new registration based on the source
// if the replyto EID is unspecified or the same as the
// source EID then we'll get status reports, otherwise
// they'll go somewhere else.
memset(®info, 0, sizeof(reginfo));
dtn_copy_eid(®info.endpoint, &source_eid);
reginfo.flags = DTN_REG_DROP;
reginfo.regid = DTN_REGID_NONE;
reginfo.expiration = 0;
if ((ret = dtn_register(handle, ®info, ®id)) != 0) {
fprintf(stderr, "error creating registration: %d (%s)\n",
ret, dtn_strerror(dtn_errno(handle)));
exit(1);
}
if (debug) printf("dtn_register succeeded, regid %d\n", regid);
// set the expiration time and request a bunch of status reports
ping_spec.expiration = expiration;
ping_spec.dopts = DOPTS_DELETE_RCPT |
DOPTS_RECEIVE_RCPT |
DOPTS_FORWARD_RCPT |
DOPTS_DELIVERY_RCPT;
// loop, sending pings and polling for activity
gettimeofday(&send_time, NULL);
// fill in a short payload string, a nonce, and a sequence number
// to verify the echo feature and make sure we're not getting
// duplicate responses or ping responses from another app
memcpy(&payload_contents.ping, PING_STR, 8);
payload_contents.seqno = 0;
payload_contents.nonce = nonce;
payload_contents.time = send_time.tv_sec;
memset(&ping_payload, 0, sizeof(ping_payload));
dtn_set_payload(&ping_payload, DTN_PAYLOAD_MEM,
(char*)&payload_contents, sizeof(payload_contents));
memset(&bundle_id, 0, sizeof(bundle_id));
if ((ret = dtn_send(handle, regid, &ping_spec, &ping_payload, &bundle_id)) != 0) {
fprintf(stderr, "error sending bundle: %d (%s)\n",
ret, dtn_strerror(dtn_errno(handle)));
exit(1);
}
memset(&reply_spec, 0, sizeof(reply_spec));
memset(&reply_payload, 0, sizeof(reply_payload));
clock = time(&clock);
tm_buf = gmtime(&clock);
printf("%s: sent at %.*s UTC\n",
ping_spec.source.uri, 24, asctime(tm_buf));
// now loop waiting for replies / status reports until we're done
done = 0;
while (1) {
int timeout = done ? wait_after_done * 1000 : -1;
if ((ret = dtn_recv(handle, &reply_spec,
DTN_PAYLOAD_MEM, &reply_payload, timeout)) < 0)
{
if (done && dtn_errno(handle) == DTN_ETIMEOUT) {
break;
}
fprintf(stderr, "error getting ping reply: %d (%s)\n",
ret, dtn_strerror(dtn_errno(handle)));
exit(1);
}
gettimeofday(&now, 0);
if (reply_payload.status_report != NULL)
{
sr_data = reply_payload.status_report;
if (sr_data->flags & STATUS_RECEIVED)
{
clock = sr_data->receipt_ts.secs + DTNTIME_OFFSET;
tm_buf = gmtime(&clock);
printf("%s: received at %.*s UTC (%ld ms rtt)\n",
reply_spec.source.uri, 24, asctime(tm_buf),
TIMEVAL_DIFF_MSEC(now, send_time));
}
if (sr_data->flags & STATUS_FORWARDED)
{
clock = sr_data->forwarding_ts.secs + DTNTIME_OFFSET;
tm_buf = gmtime(&clock);
printf("%s: forwarded at %.*s UTC (%ld ms rtt)\n",
reply_spec.source.uri, 24, asctime(tm_buf),
TIMEVAL_DIFF_MSEC(now, send_time));
}
if (sr_data->flags & STATUS_DELIVERED)
{
clock = sr_data->delivery_ts.secs + DTNTIME_OFFSET;
tm_buf = gmtime(&clock);
printf("%s: delivered at %.*s UTC (%ld ms rtt)\n",
reply_spec.source.uri, 24, asctime(tm_buf),
TIMEVAL_DIFF_MSEC(now, send_time));
}
if (sr_data->flags & STATUS_DELETED)
{
clock = sr_data->deletion_ts.secs + DTNTIME_OFFSET;
tm_buf = gmtime(&clock);
printf("%s: deleted at %.*s UTC (%s) (%ld ms rtt)\n",
reply_spec.source.uri, 24, asctime(tm_buf),
dtn_status_report_reason_to_str(sr_data->reason),
TIMEVAL_DIFF_MSEC(now, send_time));
break;
}
}
else {
if (reply_payload.buf.buf_len != sizeof(ping_payload_t))
{
printf("%d bytes from [%s]: ERROR: length != %zu\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
sizeof(ping_payload_t));
break;
}
memcpy(&recv_contents, reply_payload.buf.buf_val,
sizeof(recv_contents));
if (recv_contents.seqno != 0)
{
printf("%d bytes from [%s]: ERROR: invalid seqno %d\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
recv_contents.seqno);
break;
}
if (recv_contents.nonce != nonce)
{
printf("%d bytes from [%s]: ERROR: invalid nonce %u != %u\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
recv_contents.nonce, nonce);
break;
}
if ((int)recv_contents.time != (int)send_time.tv_sec)
{
printf("%d bytes from [%s]: ERROR: time mismatch %u != %lu\n",
reply_payload.buf.buf_len,
reply_spec.source.uri,
recv_contents.time,
(long unsigned int)send_time.tv_sec);
}
clock = reply_spec.creation_ts.secs + DTNTIME_OFFSET;
tm_buf = gmtime(&clock);
printf("%s: echo reply at %.*s UTC (%ld ms rtt)\n",
reply_spec.source.uri, 24, asctime(tm_buf),
TIMEVAL_DIFF_MSEC(now, send_time));
done = 1;
}
dtn_free_payload(&reply_payload);
}
dtn_close(handle);
return 0;
}