/**
* Flushes the cache to disk
* Returns 1 on success, 0 on failure
*/
int flush_disk_cache(struct group_list_t *group)
{
f_offset_t offset, seek_rval;
int wrote_len;
uint32_t i;
if (group->fileinfo.cache_len == 0) return 1;
offset = (f_offset_t) group->fileinfo.cache_start * group->blocksize;
if ((seek_rval = lseek_func(group->fileinfo.fd,
offset - group->fileinfo.curr_offset, SEEK_CUR)) == -1) {
gsyserror(group, "lseek failed for file");
}
if (seek_rval != offset) {
glog2(group, "offset is %s", printll(seek_rval));
glog2(group, " should be %s", printll(offset));
if ((seek_rval = lseek_func(group->fileinfo.fd, offset,
SEEK_SET)) == -1) {
gsyserror(group, "lseek failed for file");
return 0;
}
}
if ((wrote_len = write(group->fileinfo.fd, group->fileinfo.cache,
group->fileinfo.cache_len)) == -1) {
gsyserror(group, "Write failed for blocks %d - %d",
group->fileinfo.cache_start, group->fileinfo.cache_end);
return 0;
} else {
group->fileinfo.curr_offset = offset + wrote_len;
if (wrote_len != group->fileinfo.cache_len) {
glog0(group, "Write failed for blocks %d - %d, only wrote %d bytes",
group->fileinfo.cache_start, group->fileinfo.cache_end);
return 0;
} else {
glog4(group, "Wrote blocks %d - %d to disk from cache",
group->fileinfo.cache_start, group->fileinfo.cache_end);
for (i = group->fileinfo.cache_start;
i <= group->fileinfo.cache_end; i++) {
int status_idx = i - group->fileinfo.cache_start;
if (group->fileinfo.cache_status[status_idx]) {
group->fileinfo.naklist[i] = 0;
}
}
group->fileinfo.cache_start = group->fileinfo.cache_end + 1;
while ((group->fileinfo.cache_start < group->fileinfo.blocks) &&
(!group->fileinfo.naklist[group->fileinfo.cache_start])) {
group->fileinfo.cache_start++;
}
group->fileinfo.cache_end = group->fileinfo.cache_start;
group->fileinfo.cache_len = 0;
memset(group->fileinfo.cache, 0, cache_len);
memset(group->fileinfo.cache_status,0,cache_len / group->blocksize);
return 1;
}
}
}
/**
* Perform FILEINFO processing specific to a regular file in sync mode
* Returns 1 if a COMPLETE was sent in response, 0 otherwise
*/
int handle_fileinfo_sync(struct group_list_t *group)
{
stat_struct statbuf;
if (lstat_func(group->fileinfo.filepath, &statbuf) != -1) {
// If source is newer, skip
// If source is older, overwrite
// If timestamps same, skip if sizes are also same
int skip;
if (group->fileinfo.tstamp < statbuf.st_mtime) {
skip = 1;
} else if (group->fileinfo.tstamp > statbuf.st_mtime) {
skip = 0;
} else if (S_ISREG(statbuf.st_mode) &&
(statbuf.st_size == group->fileinfo.size)) {
skip = 1;
} else {
skip = 0;
}
if (skip) {
glog2(group, "skipping file, in sync");
early_complete(group, COMP_STAT_SKIPPED, 0);
return 1;
} else {
glog2(group, "overwriting out of sync file");
group->fileinfo.comp_status = COMP_STAT_OVERWRITE;
if (group->sync_preview) {
glog2(group, "Sync preview mode, skipping receive");
early_complete(group, COMP_STAT_OVERWRITE, 0);
return 1;
}
if (!tempfile) {
move_to_backup(group);
}
}
} else {
glog2(group, "copying new file");
if (group->sync_preview) {
glog2(group, "Sync preview mode, skipping receive");
early_complete(group, COMP_STAT_NORMAL, 0);
return 1;
}
if (!tempfile) {
move_to_backup(group);
}
}
return 0;
}
/**
* Processes an incoming REG_CONF message.
* Expected in response to a REGISTER when encryption is disabled.
*/
void handle_regconf(struct group_list_t *group, const unsigned char *message,
unsigned meslen)
{
const struct regconf_h *regconf;
const uint32_t *addrlist;
int addrcnt;
regconf = (const struct regconf_h *)message;
addrlist = (const uint32_t *)(message + (regconf->hlen * 4));
if ((meslen < (regconf->hlen * 4U)) ||
((regconf->hlen * 4U) < sizeof(struct regconf_h))) {
glog1(group, "Rejecting REG_CONF from server: invalid message size");
return;
}
addrcnt = (meslen - (regconf->hlen * 4)) / 4;
if (uid_in_list(addrlist, addrcnt)) {
glog2(group, "Registration confirmed");
group->phase = PHASE_MIDGROUP;
set_timeout(group, 0);
}
if (group->restart) {
read_restart_file(group);
}
}
/**
* Sends a KEYINFO_ACK in response to a KEYINFO
*/
void send_keyinfo_ack(struct group_list_t *group)
{
unsigned char *buf, *encrypted;
struct uftp_h *header;
struct keyinfoack_h *keyinfo_ack;
unsigned char *verifydata, *verify_hash, *verify_val;
unsigned int payloadlen, hashlen;
int verifylen, enclen, len;
buf = safe_calloc(MAXMTU, 1);
header = (struct uftp_h *)buf;
keyinfo_ack = (struct keyinfoack_h *)(buf + sizeof(struct uftp_h));
set_uftp_header(header, KEYINFO_ACK, group);
keyinfo_ack->func = KEYINFO_ACK;
keyinfo_ack->hlen = sizeof(struct keyinfoack_h) / 4;
verifydata = build_verify_data(group, &verifylen);
if (!verifydata) {
glog0(group, "Error getting verify data");
send_abort(group, "Error getting verify data");
free(buf);
return;
}
verify_hash = safe_calloc(group->hmaclen, 1);
verify_val = safe_calloc(VERIFY_LEN + group->hmaclen, 1);
hash(group->hashtype, verifydata, verifylen, verify_hash, &hashlen);
PRF(group->hashtype, VERIFY_LEN, group->groupmaster,
sizeof(group->groupmaster), "client finished",
verify_hash, hashlen, verify_val, &len);
memcpy(keyinfo_ack->verify_data, verify_val, VERIFY_LEN);
free(verifydata);
free(verify_hash);
free(verify_val);
payloadlen = sizeof(struct keyinfoack_h);
encrypted = NULL;
if (!encrypt_and_sign(buf, &encrypted, payloadlen, &enclen, group->keytype,
group->groupkey, group->groupsalt, &group->ivctr, group->ivlen,
group->hashtype, group->grouphmackey, group->hmaclen,group->sigtype,
group->keyextype, group->client_privkey,group->client_privkeylen)) {
glog0(group, "Error encrypting KEYINFO_ACK");
free(buf);
return;
}
payloadlen = enclen + sizeof(struct uftp_h);
if (nb_sendto(listener, encrypted, payloadlen, 0,
(struct sockaddr *)&(group->replyaddr),
family_len(group->replyaddr)) == SOCKET_ERROR) {
gsockerror(group, "Error sending KEYINFO_ACK");
} else {
glog2(group, "KEYINFO_ACK sent");
}
free(encrypted);
free(buf);
}
/**
* Save the state of a failed transfer so it can restarted later.
*/
void write_restart_file(struct group_list_t *group)
{
struct file_t *fileinfo;
struct client_restart_t restart;
char restart_name[MAXPATHNAME];
int fd;
// Don't bother if we're not using a temp directory.
if (!strcmp(tempdir, "")) {
return;
}
glog2(group, "Writing restart file");
memset(&restart, 0, sizeof(restart));
fileinfo = &group->fileinfo;
if (group->phase != PHASE_MIDGROUP) {
restart.blocks = fileinfo->blocks;
restart.sections = fileinfo->sections;
restart.size = fileinfo->size;
strncpy(restart.name, fileinfo->name, sizeof(restart.name));
restart.name[sizeof(restart.name)-1] = '\x0';
}
snprintf(restart_name, sizeof(restart_name), "%s%c_group_%08X_restart",
tempdir, PATH_SEP, group->group_id);
if ((fd = open(restart_name, OPENWRITE | O_CREAT | O_TRUNC, 0644)) == -1) {
gsyserror(group, "Failed to create restart file");
return;
}
if (file_write(fd, &restart, sizeof(restart)) == -1) {
glog0(group, "Failed to write header for restart file");
goto errexit;
}
if (fileinfo->blocks && fileinfo->naklist) {
if (file_write(fd, fileinfo->naklist, fileinfo->blocks) == -1) {
glog0(group, "Failed to write NAK list for restart file");
goto errexit;
}
}
if (fileinfo->sections && fileinfo->section_done) {
if (file_write(fd, fileinfo->section_done, fileinfo->sections) == -1) {
glog0(group, "Failed to write section_done list for restart file");
goto errexit;
}
}
close(fd);
return;
errexit:
close(fd);
unlink(restart_name);
}
/**
* Sends back a CC_ACK message for congestion control feedback
*/
void send_cc_ack(struct group_list_t *group)
{
unsigned char *buf, *encrypted, *outpacket;
struct uftp_h *header;
struct cc_ack_h *cc_ack;
struct tfmcc_ack_info_he *tfmcc;
int payloadlen, enclen;
buf = safe_calloc(MAXMTU, 1);
header = (struct uftp_h *)buf;
cc_ack = (struct cc_ack_h *)(buf + sizeof(struct uftp_h));
tfmcc = (struct tfmcc_ack_info_he *)((unsigned char *)cc_ack +
sizeof(struct cc_ack_h));
set_uftp_header(header, CC_ACK, group);
cc_ack->func = CC_ACK;
cc_ack->hlen =
(sizeof(struct cc_ack_h) + sizeof(struct tfmcc_ack_info_he)) / 4;
set_tfmcc_ack_info(group, tfmcc);
payloadlen = cc_ack->hlen * 4;
if ((group->phase != PHASE_REGISTERED) && (group->keytype != KEY_NONE)) {
encrypted = NULL;
if (!encrypt_and_sign(buf, &encrypted, payloadlen, &enclen,
group->keytype, group->groupkey, group->groupsalt,&group->ivctr,
group->ivlen, group->hashtype, group->grouphmackey,
group->hmaclen, group->sigtype, group->keyextype,
group->client_privkey, group->client_privkeylen)) {
glog0(group, "Error encrypting CC_ACK");
free(buf);
return;
}
outpacket = encrypted;
payloadlen = enclen;
} else {
encrypted = NULL;
outpacket = buf;
}
payloadlen += sizeof(struct uftp_h);
if (nb_sendto(listener, outpacket, payloadlen, 0,
(struct sockaddr *)&group->replyaddr,
family_len(group->replyaddr)) == SOCKET_ERROR) {
gsockerror(group, "Error sending CC_ACK");
} else {
glog2(group, "CC_ACK sent");
}
set_timeout(group, 0);
group->cc_time.tv_sec = 0;
group->cc_time.tv_usec = 0;
free(buf);
}
/**
* Handles an incoming KEYINFO_ACK message from a client
*/
void handle_keyinfo_ack(struct pr_group_list_t *group, int hostidx,
const unsigned char *message, unsigned meslen)
{
const struct keyinfoack_h *keyinfoack;
unsigned char *verifydata, *verify_hash, *verify_test;
int verifylen, len, dupmsg;
unsigned int hashlen;
struct pr_destinfo_t *dest;
keyinfoack = (const struct keyinfoack_h *)message;
dest = &group->destinfo[hostidx];
if ((meslen < (keyinfoack->hlen * 4U)) ||
((keyinfoack->hlen * 4U) < sizeof(struct keyinfoack_h))) {
glog1(group, "Rejecting KEYINFO_ACK from %s: invalid message size",
dest->name);
send_downstream_abort(group, dest->id, "Invalid message size", 0);
return;
}
if (!(verifydata = build_verify_data(group, hostidx, &verifylen,1))) {
glog1(group, "Rejecting KEYINFO_ACK from %s: "
"error exporting client public key", dest->name);
return;
}
verify_hash = safe_calloc(group->hmaclen, 1);
verify_test = safe_calloc(VERIFY_LEN + group->hmaclen, 1);
hash(group->hashtype, verifydata, verifylen, verify_hash, &hashlen);
PRF(group->hashtype, VERIFY_LEN, group->groupmaster,
sizeof(group->groupmaster), "client finished",
verify_hash, hashlen, verify_test, &len);
if (memcmp(keyinfoack->verify_data, verify_test, VERIFY_LEN)) {
glog1(group, "Rejecting KEYINFO_ACK from %s: verify data mismatch",
dest->name);
free(verifydata);
free(verify_hash);
free(verify_test);
return;
}
free(verifydata);
free(verify_hash);
free(verify_test);
dupmsg = (dest->state == PR_CLIENT_READY);
glog2(group, "Received KEYINFO_ACK%s from %s", dupmsg ? "+" : "",
dest->name);
dest->state = PR_CLIENT_READY;
if (!check_unfinished_clients(group, 0)) {
group->phase = PR_PHASE_RECEIVING;
}
}
/**
* Handles an incoming REGSITER message from a client.
*/
void handle_register(struct pr_group_list_t *group, int hostidx,
const unsigned char *message, unsigned meslen,
uint32_t src)
{
const struct register_h *reg;
const unsigned char *enckey;
struct pr_destinfo_t *dest;
int dupmsg;
reg = (const struct register_h *)message;
enckey = (const unsigned char *)reg + sizeof(struct register_h);
if (group->destcount == MAXPROXYDEST) {
glog1(group, "Rejecting REGISTER from %08X: max destinations exceeded",
ntohl(src));
send_downstream_abort(group, src, "Max destinations exceeded", 0);
return;
}
if ((meslen < (reg->hlen * 4U)) || ((reg->hlen * 4U) <
sizeof(struct register_h) + ntohs(reg->keyinfo_len))) {
glog1(group, "Rejecting REGISTER from %08X: invalid message size",
ntohl(src));
send_downstream_abort(group, src, "Invalid message size", 0);
return;
}
if (hostidx == -1) {
hostidx = add_client(src, group);
}
dest = &group->destinfo[hostidx];
dupmsg = (dest->registered == 1);
dest->registered = 1;
dest->regtime.tv_sec = ntohl(reg->tstamp_sec);
dest->regtime.tv_usec = ntohl(reg->tstamp_usec);
if (dest->state != PR_CLIENT_REGISTERED) {
if (group->keytype != KEY_NONE) {
if (!handle_register_keys(reg, enckey, group, hostidx, src)) {
return;
}
}
if (!group->client_auth || dest->pubkey.key) {
dest->state = PR_CLIENT_REGISTERED;
}
}
glog2(group, "Received REGISTER%s from %s", dupmsg ? "+" : "", dest->name);
if (dest->state == PR_CLIENT_REGISTERED) {
check_pending(group, hostidx, message);
}
}
/**
* Perform FILEINFO processing specific to an empty directory
*/
void handle_fileinfo_dir(struct group_list_t *group, int found_dir)
{
if (!found_dir && !group->sync_preview) {
glog2(group, "Creating directory");
if (mkdir(group->fileinfo.filepath, 0755) == -1) {
gsyserror(group, "Failed to create directory %s",
group->fileinfo.filepath);
early_complete(group, COMP_STAT_REJECTED, 0);
return;
}
}
early_complete(group, found_dir ? COMP_STAT_SKIPPED : COMP_STAT_NORMAL, 0);
}
/**
* Reads an expected FILESEG and writes it to the proper place in the file
*/
void handle_fileseg(struct group_list_t *group, const unsigned char *message,
unsigned meslen, uint16_t txseq)
{
const struct fileseg_h *fileseg;
const struct tfmcc_data_info_he *tfmcc;
const unsigned char *data;
const uint8_t *he;
int datalen, section, cache_offset, status_idx;
uint32_t seq, i;
unsigned extlen;
if (group->fileinfo.ftype != FTYPE_REG) {
glog2(group, "Rejecting FILESEG: not a regular file");
return;
}
fileseg = (const struct fileseg_h *)message;
data = message + (fileseg->hlen * 4);
datalen = meslen - (fileseg->hlen * 4);
if ((meslen < (fileseg->hlen * 4U)) ||
((fileseg->hlen * 4U) < sizeof(struct fileseg_h))) {
glog2(group, "Rejecting FILESEG: invalid message size");
return;
}
if (ntohs(fileseg->file_id) != group->file_id) {
glog2(group, "Rejecting FILESEG: got incorrect file_id %04X",
ntohs(fileseg->file_id));
return;
}
tfmcc = NULL;
if (fileseg->hlen * 4U > sizeof(struct fileseg_h)) {
he = (const uint8_t *)fileseg + sizeof(struct fileseg_h);
if (*he == EXT_TFMCC_DATA_INFO) {
tfmcc = (const struct tfmcc_data_info_he *)he;
extlen = tfmcc->extlen * 4U;
if ((extlen > (fileseg->hlen * 4U) - sizeof(struct fileseg_h)) ||
extlen < sizeof(struct tfmcc_data_info_he)) {
glog2(group, "Rejecting FILESEG: invalid extension size");
return;
}
}
}
section = ntohs(fileseg->section);
if (section >= group->fileinfo.big_sections) {
seq = (group->fileinfo.big_sections * group->fileinfo.secsize_big) +
((section - group->fileinfo.big_sections) *
group->fileinfo.secsize_small) + ntohs(fileseg->sec_block);
} else {
seq = (section * group->fileinfo.secsize_big) +
ntohs(fileseg->sec_block);
}
if ((datalen != group->blocksize) &&
(seq != group->fileinfo.blocks - 1)) {
glog2(group, "Rejecting FILESEG: invalid data size %d", datalen);
return;
}
if (log_level >= 5) {
glog5(group, "Got packet %d", seq);
} else if (log_level == 4) {
if (seq != group->fileinfo.last_block + 1) {
glog4(group, "Got packet %d, last was %d",
seq, group->fileinfo.last_block);
}
}
if ((group->cc_type == CC_TFMCC) && tfmcc) {
handle_tfmcc_data_info(group, tfmcc);
}
group->fileinfo.got_data = 1;
group->fileinfo.last_block = seq;
if (txseq == group->max_txseq) {
if ((section > group->fileinfo.last_section) &&
(group->fileinfo.nak_time.tv_sec == 0)) {
// Start timer to send NAKs
gettimeofday(&group->fileinfo.nak_time, NULL);
add_timeval_d(&group->fileinfo.nak_time, 1 * group->grtt);
group->fileinfo.nak_section_first = group->fileinfo.last_section;
group->fileinfo.nak_section_last = section;
group->fileinfo.got_done = 0;
glog3(group, "New section, set NAK timer for sections %d - %d",
group->fileinfo.nak_section_first,
group->fileinfo.nak_section_last);
}
group->fileinfo.last_section = section;
}
if (group->fileinfo.naklist[seq]) {
if ((seq >= group->fileinfo.cache_start) &&
(seq <= group->fileinfo.cache_end + MAXMISORDER)) {
cache_offset=(seq - group->fileinfo.cache_start) * group->blocksize;
if (seq > group->fileinfo.cache_end) {
if ((cache_offset + datalen) > cache_len) {
glog4(group, "Disk cache full, flushing");
if (!flush_disk_cache(group)) {
return;
}
cache_offset = (seq - group->fileinfo.cache_start) *
group->blocksize;
} else {
for (i = group->fileinfo.cache_end; i <= seq; i++) {
if (!group->fileinfo.naklist[i]) {
glog3(group, "Cache gap seq %d "
"already received, flushing", i);
if (!flush_disk_cache(group)) {
return;
}
group->fileinfo.cache_start = seq;
cache_offset = 0;
break;
}
}
group->fileinfo.cache_end = seq;
}
}
} else {
if (group->fileinfo.cache_len != 0) {
glog3(group, "Seq %d out of cache range, flushing", seq);
if (!flush_disk_cache(group)) {
return;
}
}
cache_offset = 0;
group->fileinfo.cache_start = seq;
group->fileinfo.cache_end = seq;
}
group->fileinfo.cache_len = ((group->fileinfo.cache_end -
group->fileinfo.cache_start) * group->blocksize) + datalen;
status_idx = seq - group->fileinfo.cache_start;
if (group->fileinfo.cache_len > cache_len) {
glog0(group, "Cache overrun: "
"current cache len = %d, status_idx = %d",
group->fileinfo.cache_len, status_idx);
}
group->fileinfo.cache_status[status_idx] = 1;
memcpy(&group->fileinfo.cache[cache_offset], data, datalen);
}
set_timeout(group, 0);
}
/**
* Sends a KEYINFO to each client that the server sent a REG_CONF for.
*/
void send_keyinfo(struct pr_group_list_t *group, const uint32_t *addrlist,
int addrlen)
{
unsigned char *buf, *iv;
struct uftp_h *header;
struct keyinfo_h *keyinfo_hdr;
struct destkey *keylist;
unsigned int payloadlen, len;
int maxdest, packetcnt, dests, iv_init, foundaddr, i, j;
int unauth_keytype, unauth_keylen, unauth_ivlen;
struct pr_destinfo_t *dest;
// Don't use a cipher in an authentication mode to encrypt the group master
unauth_keytype = unauth_key(group->keytype);
get_key_info(unauth_keytype, &unauth_keylen, &unauth_ivlen);
buf = safe_calloc(MAXMTU, 1);
iv = safe_calloc(unauth_ivlen, 1);
header = (struct uftp_h *)buf;
keyinfo_hdr = (struct keyinfo_h *)(buf + sizeof(struct uftp_h));
keylist= (struct destkey *)((char *)keyinfo_hdr + sizeof(struct keyinfo_h));
set_uftp_header(header, KEYINFO, group);
keyinfo_hdr->func = KEYINFO;
keyinfo_hdr->hlen = sizeof(struct keyinfo_h) / 4;
iv_init = 0;
maxdest = max_msg_dest(group, KEYINFO, keyinfo_hdr->hlen * 4);
packetcnt = 1;
for (i = 0, dests = 0; i < group->destcount; i++) {
dest = &group->destinfo[i];
if (dest->state == PR_CLIENT_CONF) {
if (addrlist) {
// We just got a REG_CONF, so only send to listed hosts
for (j = 0, foundaddr = 0; (j < addrlen) && (!foundaddr); j++) {
if (dest->id == addrlist[j]) {
foundaddr = 1;
}
}
} else {
foundaddr = 1;
}
if (foundaddr) {
if (!iv_init) {
group->ivctr++;
keyinfo_hdr->iv_ctr_hi =
htonl((group->ivctr & 0xFFFFFFFF00000000LL) >> 32);
keyinfo_hdr->iv_ctr_lo =
htonl(group->ivctr & 0x00000000FFFFFFFFLL);
iv_init = 1;
}
keylist[dests].dest_id = dest->id;
build_iv(iv, dest->salt, unauth_ivlen,
uftp_htonll(group->ivctr), group->src_id);
if (!encrypt_block(unauth_keytype, iv, dest->key,
NULL, 0, &group->groupmaster[1],
sizeof(group->groupmaster) - 1,
keylist[dests].groupmaster, &len)) {
glog0(group, "Error encrypting KEYINFO for %s", dest->name);
free(buf);
free(iv);
return;
}
dests++;
}
}
if ((dests >= maxdest) ||
((i == group->destcount - 1) && (dests > 0))) {
payloadlen = sizeof(struct keyinfo_h) +
(dests * sizeof(struct destkey));
glog2(group,"Sending KEYINFO %d.%d", group->keyinfo_cnt, packetcnt);
if (nb_sendto(listener, buf, payloadlen + sizeof(struct uftp_h), 0,
(struct sockaddr *)&group->privatemcast,
family_len(group->privatemcast)) == SOCKET_ERROR) {
gsockerror(group, "Error sending KEYINFO");
free(buf);
free(iv);
return;
}
// TODO: This value is good for around 100Mbps. This is under the
// assumption that the client proxy is local to the clients
// it serves. This should probably be a parameter.
usleep(120);
memset(keylist, 0, maxdest * sizeof(struct destkey));
iv_init = 0;
dests = 0;
packetcnt++;
}
}
/**
* Sends back a COMPLETE message in response to a DONE or FILEINFO
*/
void send_complete(struct group_list_t *group, int set_freespace)
{
unsigned char *buf, *encrypted, *outpacket;
struct uftp_h *header;
struct complete_h *complete;
struct freespace_info_he *freespace;
int payloadlen, enclen;
struct timeval tv;
gettimeofday(&tv, NULL);
if ((group->phase == PHASE_COMPLETE) &&
(cmptimestamp(tv, group->expire_time) >= 0)) {
glog1(group, "Completion unconfirmed by server");
move_files(group);
file_cleanup(group, 0);
return;
}
buf = safe_calloc(MAXMTU, 1);
header = (struct uftp_h *)buf;
complete = (struct complete_h *)(buf + sizeof(struct uftp_h));
freespace = (struct freespace_info_he *)((unsigned char *)complete +
sizeof(struct complete_h));
set_uftp_header(header, COMPLETE, group);
complete->func = COMPLETE;
if (set_freespace) {
complete->hlen = (sizeof(struct complete_h) +
sizeof(struct freespace_info_he)) / 4;
} else {
complete->hlen = sizeof(struct complete_h) / 4;
}
complete->status = group->fileinfo.comp_status;
complete->file_id = htons(group->file_id);
if (set_freespace) {
set_freespace_info(group, freespace);
}
payloadlen = complete->hlen * 4;
if ((group->phase != PHASE_REGISTERED) && (group->keytype != KEY_NONE)) {
encrypted = NULL;
if (!encrypt_and_sign(buf, &encrypted, payloadlen, &enclen,
group->keytype, group->groupkey, group->groupsalt,&group->ivctr,
group->ivlen, group->hashtype, group->grouphmackey,
group->hmaclen, group->sigtype, group->keyextype,
group->client_privkey, group->client_privkeylen)) {
glog0(group, "Error encrypting COMPLETE");
free(buf);
return;
}
outpacket = encrypted;
payloadlen = enclen;
} else {
encrypted = NULL;
outpacket = buf;
}
payloadlen += sizeof(struct uftp_h);
if (nb_sendto(listener, outpacket, payloadlen, 0,
(struct sockaddr *)&group->replyaddr,
family_len(group->replyaddr)) == SOCKET_ERROR) {
gsockerror(group, "Error sending COMPLETE");
} else {
glog2(group, "COMPLETE sent");
}
set_timeout(group, 0);
free(buf);
free(encrypted);
}
/**
* Sends back a STATUS message with the given NAK list
*/
void send_status(struct group_list_t *group, unsigned int section,
const unsigned char *naks, unsigned int nak_count)
{
unsigned char *buf, *encrypted, *outpacket;
struct uftp_h *header;
struct status_h *status;
struct tfmcc_ack_info_he *tfmcc;
unsigned char *sent_naks;
int payloadlen, enclen;
buf = safe_calloc(MAXMTU, 1);
header = (struct uftp_h *)buf;
status = (struct status_h *)(buf + sizeof(struct uftp_h));
tfmcc = (struct tfmcc_ack_info_he *)((unsigned char *)status +
sizeof(struct status_h));
set_uftp_header(header, STATUS, group);
status->func = STATUS;
if (group->cc_type == CC_TFMCC) {
status->hlen =
(sizeof(struct status_h) + sizeof(struct tfmcc_ack_info_he)) / 4;
} else {
status->hlen = sizeof(struct status_h) / 4;
}
status->file_id = htons(group->file_id);
status->section = htons(section);
if (section >= group->fileinfo.big_sections) {
payloadlen = (group->fileinfo.secsize_small / 8) + 1;
} else {
payloadlen = (group->fileinfo.secsize_big / 8) + 1;
}
if (group->cc_type == CC_TFMCC) {
set_tfmcc_ack_info(group, tfmcc);
}
sent_naks = (unsigned char *)status + (status->hlen * 4);
memcpy(sent_naks, naks, payloadlen);
payloadlen += status->hlen * 4;
if ((group->phase != PHASE_REGISTERED) && (group->keytype != KEY_NONE)) {
encrypted = NULL;
if (!encrypt_and_sign(buf, &encrypted, payloadlen, &enclen,
group->keytype, group->groupkey, group->groupsalt,&group->ivctr,
group->ivlen, group->hashtype, group->grouphmackey,
group->hmaclen, group->sigtype, group->keyextype,
group->client_privkey, group->client_privkeylen)) {
glog0(group, "Error encrypting STATUS");
free(buf);
return;
}
outpacket = encrypted;
payloadlen = enclen;
} else {
encrypted = NULL;
outpacket = buf;
}
payloadlen += sizeof(struct uftp_h);
if (nb_sendto(listener, outpacket, payloadlen, 0,
(struct sockaddr *)&group->replyaddr,
family_len(group->replyaddr)) == SOCKET_ERROR) {
gsockerror(group, "Error sending STATUS");
} else {
glog2(group, "Sent %d NAKs for section %d", nak_count, section);
}
free(buf);
free(encrypted);
}
/**
* Send a KEYINFO message. Sent during the Announce phase for a group
* with encryption enabled.
* Returns 1 on success, 0 on fail.
*/
int send_keyinfo(const struct finfo_t *finfo, int attempt)
{
unsigned char *buf, *iv;
struct uftp_h *header;
struct keyinfo_h *keyinfo;
struct destkey *keylist;
unsigned int hsize, payloadlen, len;
int maxdest, packetcnt, dests, iv_init, i;
int unauth_keytype, unauth_keylen, unauth_ivlen;
// Don't use a cipher in an authentication mode to encrypt the group master
unauth_keytype = unauth_key(keytype);
get_key_info(unauth_keytype, &unauth_keylen, &unauth_ivlen);
buf = safe_calloc(MAXMTU, 1);
iv = safe_calloc(unauth_ivlen, 1);
header = (struct uftp_h *)buf;
keyinfo = (struct keyinfo_h *)(buf + sizeof(struct uftp_h));
keylist = (struct destkey *)((char *)keyinfo + sizeof(struct keyinfo_h));
set_uftp_header(header, KEYINFO, finfo->group_id, finfo->group_inst,
grtt, destcount);
keyinfo->func = KEYINFO;
keyinfo->hlen = sizeof(struct keyinfo_h) / 4;
keylist = (struct destkey *)((uint8_t *)keyinfo + (keyinfo->hlen * 4));
iv_init = 0;
hsize = sizeof(struct keyinfo_h);
maxdest = blocksize / sizeof(struct destkey);
packetcnt = 1;
for (i = 0, dests = 0; i < destcount; i++) {
if (destlist[i].status == DEST_REGISTERED) {
if (!iv_init) {
ivctr++;
keyinfo->iv_ctr_hi =htonl((ivctr & 0xFFFFFFFF00000000LL) >> 32);
keyinfo->iv_ctr_lo = htonl(ivctr & 0x00000000FFFFFFFFLL);
iv_init = 1;
}
keylist[dests].dest_id = destlist[i].id;
build_iv(iv, destlist[i].encinfo->salt, unauth_ivlen,
uftp_htonll(ivctr), header->src_id);
if (!encrypt_block(unauth_keytype, iv,destlist[i].encinfo->key,
NULL,0, &groupmaster[1], sizeof(groupmaster) - 1,
keylist[dests].groupmaster, &len)) {
glog0(finfo, "Error encrypting KEYINFO for %s",
destlist[i].name);
free(buf);
free(iv);
return 0;
}
dests++;
}
if ((dests >= maxdest) || ((i == destcount - 1) && (dests > 0))) {
header->seq = htons(send_seq++);
payloadlen = hsize + (dests * sizeof(struct destkey));
glog2(finfo, "Sending KEYINFO %d.%d", attempt, packetcnt);
if (nb_sendto(sock, buf, payloadlen + sizeof(struct uftp_h), 0,
(struct sockaddr *)&receive_dest,
family_len(receive_dest)) == SOCKET_ERROR) {
gsockerror(finfo, "Error sending KEYINFO");
sleep(1);
free(buf);
free(iv);
return 0;
}
if (packet_wait) usleep(packet_wait);
memset(keylist, 0, maxdest * sizeof(struct destkey));
iv_init = 0;
dests = 0;
packetcnt++;
}
}
/**
* Send the ANNOUNCE message
* For open group membership, just send one. For closed group membership,
* list as many destinations as will fit and send multiple packets so that
* each receiver is listed.
* Returns 1 on success, 0 on fail.
*/
int send_announce(const struct finfo_t *finfo, int attempt, int open)
{
int packetlen, rval, iplen, extlen;
unsigned char *buf;
struct uftp_h *header;
struct announce_h *announce;
unsigned char *publicaddr, *privateaddr;
struct enc_info_he *encinfo;
struct timeval tv;
uint32_t *idlist;
buf = safe_calloc(MAXMTU, 1);
if (listen_dest.ss.ss_family == AF_INET6) {
iplen = sizeof(struct in6_addr);
} else {
iplen = sizeof(struct in_addr);
}
header = (struct uftp_h *)buf;
announce = (struct announce_h *)(buf + sizeof(struct uftp_h));
publicaddr = (unsigned char *)announce + sizeof(struct announce_h);
privateaddr = publicaddr + iplen;
encinfo = (struct enc_info_he *)(privateaddr + iplen);
set_uftp_header(header, ANNOUNCE, finfo->group_id, finfo->group_inst,
grtt, destcount);
announce->func = ANNOUNCE;
if (sync_mode) {
announce->flags |= FLAG_SYNC_MODE;
if (sync_preview) {
announce->flags |= FLAG_SYNC_PREVIEW;
}
}
announce->robust = robust;
announce->cc_type = cc_type;
announce->blocksize = htons(blocksize);
gettimeofday(&tv, NULL);
announce->tstamp_sec = htonl(tv.tv_sec);
announce->tstamp_usec = htonl(tv.tv_usec);
if (!is_multicast(&listen_dest, 0)) {
memset(publicaddr, 0, iplen);
memset(privateaddr, 0, iplen);
} else if (listen_dest.ss.ss_family == AF_INET6) {
memcpy(publicaddr, &listen_dest.sin6.sin6_addr.s6_addr, iplen);
memcpy(privateaddr, &receive_dest.sin6.sin6_addr.s6_addr, iplen);
} else {
memcpy(publicaddr, &listen_dest.sin.sin_addr.s_addr, iplen);
memcpy(privateaddr, &receive_dest.sin.sin_addr.s_addr, iplen);
}
if (listen_dest.ss.ss_family == AF_INET6) {
announce->flags |= FLAG_IPV6;
}
if (keytype != KEY_NONE) {
extlen = set_enc_info(finfo, encinfo);
if (extlen == 0) {
glog0(finfo, "Error setting up EXT_ENC_INFO");
free(buf);
return 0;
}
announce->hlen = (sizeof(struct announce_h) +
iplen + iplen + extlen) / 4;
} else {
announce->hlen = (sizeof(struct announce_h) + iplen + iplen) / 4;
}
idlist = (uint32_t *)((uint8_t *)announce + (announce->hlen * 4));
if (open) {
header->seq = htons(send_seq++);
packetlen = sizeof(struct uftp_h) + (announce->hlen * 4);
if (!sign_announce(finfo, buf, packetlen)) {
glog0(finfo, "Error signing ANNOUNCE");
free(buf);
return 0;
}
glog2(finfo, "Sending ANNOUNCE %d", attempt);
if (nb_sendto(sock, buf, packetlen, 0, (struct sockaddr *)&listen_dest,
family_len(listen_dest)) == SOCKET_ERROR) {
gsockerror(finfo, "Error sending ANNOUNCE");
// So we don't spin our wheels...
sleep(1);
free(buf);
return 0;
}
free(buf);
return 1;
} else {
rval = send_multiple(finfo, buf, ANNOUNCE, attempt, idlist,
DEST_MUTE, 0, &listen_dest, 0);
free(buf);
return rval;
}
}
/**
* For the current file in a group, move the existing file to
* the appropriate backup directory, if it exists.
* In the event of a failure, delete the original file
*/
void move_to_backup(struct group_list_t *group)
{
stat_struct statbuf;
char backup_file[MAXBACKUPPATHNAME], *trim_name;
int len;
if (lstat_func(group->fileinfo.filepath, &statbuf) == -1) {
return;
}
if (backupcnt == 0) {
clear_path(group->fileinfo.filepath, group);
return;
}
#ifdef WINDOWS
if ((group->fileinfo.filepath[1] == ':') &&
(group->fileinfo.filepath[2] == '\\')) {
trim_name = &group->fileinfo.filepath[3];
} else {
trim_name = group->fileinfo.filepath;
}
#else
trim_name = group->fileinfo.filepath;
#endif
len = snprintf(backup_file, sizeof(backup_file), "%s%c%s%c%s%c%s",
backupdir[group->fileinfo.destdiridx], PATH_SEP,
group->start_date, PATH_SEP,
group->start_time, PATH_SEP, trim_name);
if (len >= sizeof(backup_file)) {
glog0(group, "Max pathname length exceeded for backup file, deleting",
group->fileinfo.filepath);
clear_path(group->fileinfo.filepath, group);
return;
}
clear_path(backup_file, group);
if (!create_path_to_file(group, backup_file)) {
glog0(group, "Error creating path to backup file");
clear_path(group->fileinfo.filepath, group);
}
#ifdef WINDOWS
if (!MoveFile(group->fileinfo.filepath, backup_file)) {
char errbuf[300];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL,
GetLastError(), 0, errbuf, sizeof(errbuf), NULL);
glog0(group, "Couldn't rename from %s to %s, deleting: (%d): %s",
group->fileinfo.filepath, backup_file, GetLastError(), errbuf);
clear_path(group->fileinfo.filepath, group);
} else {
glog2(group, "Backed up existing file to %s", backup_file);
}
#else
if (rename(group->fileinfo.filepath, backup_file) == -1) {
gsyserror(group, "Couldn't rename from %s to %s, deleting",
group->fileinfo.filepath, backup_file);
clear_path(group->fileinfo.filepath, group);
} else {
glog2(group, "Backed up existing file to %s", backup_file);
}
#endif
}
/**
* Sends a FILEINFO_ACK in response to a FILEINFO
*/
void send_fileinfo_ack(struct group_list_t *group, int restart)
{
unsigned char *buf, *encrypted, *outpacket;
struct uftp_h *header;
struct fileinfoack_h *fileinfo_ack;
struct timeval now, send_time;
unsigned int payloadlen;
int enclen;
buf = safe_calloc(MAXMTU, 1);
header = (struct uftp_h *)buf;
fileinfo_ack = (struct fileinfoack_h *)(buf + sizeof(struct uftp_h));
payloadlen = sizeof(struct fileinfoack_h);
set_uftp_header(header, FILEINFO_ACK, group);
fileinfo_ack->func = FILEINFO_ACK;
fileinfo_ack->hlen = sizeof(struct fileinfoack_h) / 4;
fileinfo_ack->file_id = htons(group->file_id);
if (restart) {
fileinfo_ack->flags |= FLAG_PARTIAL;
}
gettimeofday(&now, NULL);
if (cmptimestamp(now, group->last_server_rx_ts) <= 0) {
send_time = group->last_server_ts;
} else {
send_time = add_timeval(group->last_server_ts,
diff_timeval(now, group->last_server_rx_ts));
}
fileinfo_ack->tstamp_sec = htonl((uint32_t)send_time.tv_sec);
fileinfo_ack->tstamp_usec = htonl((uint32_t)send_time.tv_usec);
if (group->keytype != KEY_NONE) {
encrypted = NULL;
if (!encrypt_and_sign(buf, &encrypted, payloadlen, &enclen,
group->keytype, group->groupkey, group->groupsalt,&group->ivctr,
group->ivlen, group->hashtype, group->grouphmackey,
group->hmaclen, group->sigtype, group->keyextype,
group->client_privkey, group->client_privkeylen)) {
glog0(group, "Error encrypting FILEINFO_ACK");
free(buf);
return;
}
outpacket = encrypted;
payloadlen = enclen;
} else {
encrypted = NULL;
outpacket = buf;
}
payloadlen += sizeof(struct uftp_h);
if (nb_sendto(listener, outpacket, payloadlen, 0,
(struct sockaddr *)&(group->replyaddr),
family_len(group->replyaddr)) == SOCKET_ERROR) {
gsockerror(group, "Error sending FILEINFO_ACK");
} else {
glog2(group, "FILEINFO_ACK sent");
}
glog3(group, "send time: %d.%06d", send_time.tv_sec, send_time.tv_usec);
free(encrypted);
free(buf);
}
/**
* Forward a message unmodified to the next hop, resigning if necessary.
*/
void forward_message(struct pr_group_list_t *group,
const union sockaddr_u *src,
unsigned char *packet, int packetlen)
{
struct uftp_h *header;
struct encrypted_h *encrypted;
struct announce_h *announce;
struct enc_info_he *encinfo;
union sockaddr_u dest;
unsigned int meslen, siglen;
int hostidx, rval, iplen, resign;
char destname[INET6_ADDRSTRLEN], destport[PORTNAME_LEN];
uint8_t *sig, *sigcopy;
union key_t key;
header = (struct uftp_h *)packet;
meslen = (unsigned int)packetlen;
memset(&dest, 0, sizeof(dest));
if (!memcmp(src, &group->up_addr, sizeof(*src))) {
if (proxy_type == RESPONSE_PROXY) {
// Response proxy, no downstream forwarding
set_timeout(group, 0, 0);
return;
} else if (proxy_type == SERVER_PROXY) {
dest = down_addr;
} else {
if (header->func == ANNOUNCE) {
dest = group->publicmcast;
} else {
dest = group->privatemcast;
}
key = group->server_pubkey;
}
} else {
dest = group->up_addr;
if (proxy_type != SERVER_PROXY) {
hostidx = find_client(group, header->src_id);
if (hostidx == -1) {
glog1(group, "Couldn't find receiver in list");
return;
}
key = group->destinfo[hostidx].pubkey;
}
}
// If we're using KEYEX signatures, or sending an ANNOUNCE with ECDH,
// verify the signature and resign
resign = 0;
if ((proxy_type != SERVER_PROXY) && (header->func == ENCRYPTED) &&
(group->sigtype == SIG_KEYEX)) {
encrypted = (struct encrypted_h *)(packet + sizeof(struct uftp_h));
sig = (uint8_t *)encrypted + sizeof(struct encrypted_h);
siglen = ntohs(encrypted->sig_len);
resign = 1;
} else if ((proxy_type != SERVER_PROXY) && (header->func == ANNOUNCE) &&
((group->keyextype == KEYEX_ECDH_RSA) ||
(group->keyextype == KEYEX_ECDH_ECDSA))) {
announce = (struct announce_h *)(packet + sizeof(struct uftp_h));
iplen = ((announce->flags & FLAG_IPV6) != 0) ? 16 : 4;
encinfo = (struct enc_info_he *) ((uint8_t *)announce +
sizeof(struct announce_h) + iplen + iplen);
sig = (uint8_t *)encinfo + sizeof(struct enc_info_he) +
ntohs(encinfo->keylen) + ntohs(encinfo->dhlen);
siglen = ntohs(encinfo->siglen);
resign = 1;
}
if (resign) {
sigcopy = safe_calloc(siglen, 1);
memcpy(sigcopy, sig, siglen);
memset(sig, 0, siglen);
if ((group->keyextype == KEYEX_RSA) ||
(group->keyextype == KEYEX_ECDH_RSA)) {
if (header->func == ENCRYPTED) {
if (!verify_RSA_sig(key.rsa, group->hashtype, packet,
meslen, sigcopy, siglen)) {
glog1(group, "Signature verification failed");
free(sigcopy);
return;
}
}
if (!create_RSA_sig(group->proxy_privkey.rsa, group->hashtype,
packet, meslen, sigcopy, &siglen)) {
glog0(group, "Signature creation failed");
free(sigcopy);
return;
}
} else {
if (header->func == ENCRYPTED) {
if (!verify_ECDSA_sig(key.ec, group->hashtype, packet,
meslen, sigcopy, siglen)) {
glog1(group, "Signature verification failed");
free(sigcopy);
return;
}
}
if (!create_ECDSA_sig(group->proxy_privkey.ec, group->hashtype,
packet, meslen, sigcopy, &siglen)) {
glog0(group, "Signature creation failed");
free(sigcopy);
return;
}
}
memcpy(sig, sigcopy, siglen);
free(sigcopy);
}
if (nb_sendto(listener, packet, meslen, 0, (struct sockaddr *)&dest,
family_len(dest)) == SOCKET_ERROR) {
gsockerror(group, "Error forwarding message");
if ((rval = getnameinfo((struct sockaddr *)&dest, family_len(dest),
destname, sizeof(destname), destport, sizeof(destport),
NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
glog1(group, "getnameinfo failed: %s", gai_strerror(rval));
}
glog2(group, "Dest: %s:%s", destname, destport);
}
set_timeout(group, 0, 0);
}
/**
* Handles an incoming CLIENT_KEY message from a client.
*/
void handle_clientkey(struct pr_group_list_t *group, int hostidx,
const unsigned char *message, unsigned meslen,
uint32_t src)
{
const struct client_key_h *clientkey;
const unsigned char *keyblob, *verify;
struct pr_destinfo_t *dest;
int dupmsg;
clientkey = (const struct client_key_h *)message;
keyblob = (const unsigned char *)clientkey + sizeof(struct client_key_h);
verify = keyblob + ntohs(clientkey->bloblen);
if (group->destcount == MAXPROXYDEST) {
glog1(group, "Rejecting CLIENT_KEY from %08X: "
"max destinations exceeded", ntohl(src));
send_downstream_abort(group, src, "Max destinations exceeded", 0);
return;
}
if ((meslen < (clientkey->hlen * 4U)) ||
((clientkey->hlen * 4U) < sizeof(struct client_key_h) +
ntohs(clientkey->bloblen) + ntohs(clientkey->siglen))) {
glog1(group, "Rejecting CLIENT_KEY from %08X: invalid message size",
ntohl(src));
send_downstream_abort(group, src, "Invalid message size", 0);
return;
}
if ((((group->keyextype == KEYEX_RSA) ||
(group->keyextype == KEYEX_ECDH_RSA)) &&
(keyblob[0] != KEYBLOB_RSA)) ||
((group->keyextype == KEYEX_ECDH_ECDSA) &&
(keyblob[0] != KEYBLOB_EC))) {
glog1(group, "Rejecting CLIENT_KEY from %08X: invalid keyblob type",
ntohl(src));
send_downstream_abort(group, src, "Invalid keyblob type", 0);
return;
}
if (hostidx == -1) {
hostidx = add_client(src, group);
}
dest = &group->destinfo[hostidx];
dupmsg = (dest->pubkey.key != 0);
if (!dest->verified) {
if (keyblob[0] == KEYBLOB_RSA) {
if (!import_RSA_key(&dest->pubkey.rsa, keyblob,
ntohs(clientkey->bloblen))) {
glog1(group, "Failed to load client public key");
send_downstream_abort(group, src,
"Failed to load client public key", 0);
return;
}
dest->pubkeylen = RSA_keylen(dest->pubkey.rsa);
} else {
if (!import_EC_key(&dest->pubkey.ec, keyblob,
ntohs(clientkey->bloblen), 0)) {
glog1(group, "Failed to load client public key");
send_downstream_abort(group, src,
"Failed to load client public key", 0);
return;
}
dest->pubkeylen = ECDSA_siglen(dest->pubkey.ec);
}
if (!verify_fingerprint(client_fp, client_fp_count, keyblob,
ntohs(clientkey->bloblen), group, src)) {
glog1(group, "Failed to verify client key fingerprint");
send_downstream_abort(group, src,
"Failed to verify client key fingerprint", 0);
return;
}
dest->verified = 1;
}
memcpy(dest->verifydata, verify, ntohs(clientkey->siglen));
dest->verifylen = ntohs(clientkey->siglen);
if (dest->registered) {
if (!verify_client_key(group, hostidx)) {
return;
}
dest->state = PR_CLIENT_REGISTERED;
}
glog2(group,"Received CLIENT_KEY%s from %s", dupmsg ? "+" : "", dest->name);
if (dest->state == PR_CLIENT_REGISTERED) {
// Pass in a dummy REGISTER message to check_pending, since
// CLIENT_KEY is basically an extension of REGISTER.
struct register_h reg;
reg.func = REGISTER;
check_pending(group, hostidx, (unsigned char *)®);
}
}
/**
* Process an incoming KEYINFO message.
* Expected in response to a REGISTER when encryption is enabled.
*/
void handle_keyinfo(struct group_list_t *group, unsigned char *message,
unsigned meslen, uint32_t src_id)
{
struct keyinfo_h *keyinfo_hdr;
struct destkey *keylist;
int i, keyidx, len, destkeycnt, unauth_keytype, unauth_keylen, unauth_ivlen;
unsigned explen, declen;
uint8_t decgroupmaster[MASTER_LEN], *prf_buf, *iv;
uint64_t ivctr;
keyinfo_hdr = (struct keyinfo_h *)message;
keylist = (struct destkey *)(message + (keyinfo_hdr->hlen * 4));
if ((meslen < (keyinfo_hdr->hlen * 4U)) ||
((keyinfo_hdr->hlen * 4U) < sizeof(struct keyinfo_h))) {
glog1(group, "Rejecting KEYINFO from server: invalid message size");
return;
}
destkeycnt = (meslen - (keyinfo_hdr->hlen * 4)) / sizeof(struct destkey);
// This duplicates uid_in_list, but here it's addressed in a struct array
for (i = 0, keyidx = -1; (i < destkeycnt) && (keyidx == -1); i++) {
if (uid == keylist[i].dest_id) {
keyidx = i;
}
}
// Don't use a cipher in an authentication mode to decrypt the group master
unauth_keytype = unauth_key(group->keytype);
get_key_info(unauth_keytype, &unauth_keylen, &unauth_ivlen);
if (keyidx != -1) {
glog2(group, "Received KEYINFO");
if (group->phase == PHASE_MIDGROUP) {
// We already got the KEYINFO, so no need to reprocess.
// Just resend the KEYINFO_ACK and reset the timeout
send_keyinfo_ack(group);
set_timeout(group, 0);
return;
}
iv = safe_calloc(unauth_ivlen, 1);
ivctr = ntohl(keyinfo_hdr->iv_ctr_lo);
ivctr |= (uint64_t)ntohl(keyinfo_hdr->iv_ctr_hi) << 32;
build_iv(iv, group->salt, unauth_ivlen, uftp_htonll(ivctr), src_id);
if (!decrypt_block(unauth_keytype, iv, group->key, NULL, 0,
keylist[keyidx].groupmaster, MASTER_LEN,
decgroupmaster, &declen) ||
(declen != MASTER_LEN - 1)) {
glog1(group, "Decrypt failed for group master");
send_abort(group, "Decrypt failed for group master");
free(iv);
return;
}
free(iv);
group->groupmaster[0] = group->version;
memcpy(&group->groupmaster[1], decgroupmaster, declen);
explen = group->keylen + SALT_LEN + group->hmaclen;
prf_buf = safe_calloc(explen + group->hmaclen, 1);
PRF(group->hashtype, explen, group->groupmaster,
sizeof(group->groupmaster), "key expansion",
group->rand1, sizeof(group->rand1), prf_buf, &len);
memcpy(group->grouphmackey, prf_buf, group->hmaclen);
memcpy(group->groupkey, prf_buf + group->hmaclen, group->keylen);
memcpy(group->groupsalt, prf_buf + group->hmaclen + group->keylen,
SALT_LEN);
free(prf_buf);
group->phase = PHASE_MIDGROUP;
send_keyinfo_ack(group);
set_timeout(group, 0);
if (group->restart) {
read_restart_file(group);
}
}
}
/**
* Reads in the contents of the restart file.
*/
void read_restart_file(struct group_list_t *group)
{
struct client_restart_t *restart;
char restart_name[MAXPATHNAME];
int fd, i, rval;
// Don't bother if we're not using a temp directory.
if (!strcmp(tempdir, "")) {
return;
}
// First abort any prior session with the same group_id.
// This creates the restart file.
for (i = 0; i < MAXLIST; i++) {
if ((group_list[i].group_id == group->group_id) &&
(group_list[i].group_inst < group->group_inst)) {
file_cleanup(&group_list[i], 1);
}
}
glog2(group, "Reading restart file");
snprintf(restart_name, sizeof(restart_name), "%s%c_group_%08X_restart",
tempdir, PATH_SEP, group->group_id);
if ((fd = open(restart_name, OPENREAD, 0644)) == -1) {
gsyserror(group, "Failed to read restart file");
return;
}
// Read header
restart = safe_calloc(sizeof(struct client_restart_t), 1);
if ((rval = file_read(fd, restart, sizeof(struct client_restart_t),
0)) == -1) {
glog0(group, "Failed to read header for restart file");
goto err1;
}
if (rval != sizeof(struct client_restart_t)) {
glog0(group, "Failed to read header for restart file "
"(read %d, expected %d)", rval,sizeof(struct client_restart_t));
goto err1;
}
// Read NAK list
if (restart->blocks) {
restart->naklist = safe_calloc(restart->blocks, 1);
if (file_read(fd, restart->naklist, restart->blocks, 0) == -1) {
glog0(group, "Failed to read NAK list for restart file");
goto err2;
}
}
// Read section_done list
if (restart->sections) {
restart->section_done = safe_calloc(restart->sections, 1);
if (file_read(fd, restart->section_done, restart->sections, 0) == -1) {
glog0(group, "Failed to read section_done list for restart file");
goto err3;
}
}
close(fd);
unlink(restart_name);
group->restartinfo = restart;
glog3(group, "Reading restart file done");
return;
err3:
free(restart->section_done);
err2:
free(restart->naklist);
err1:
free(restart);
close(fd);
}
/**
* Gets the current timeout value to use for the main loop
*
* First check to see if any active groups have an expired timeout, and
* handle that timeout. Once all expired timeouts have been handled, find
* the active group with the earliest timeout and return the time until that
* timeout. If there are no active groups, return NULL.
*/
struct timeval *getrecenttimeout(void)
{
static struct timeval tv = {0,0};
struct timeval current_timestamp, min_timestamp;
int i, found_timeout, done, sent_naks;
struct group_list_t *group;
unsigned int section, nak_count;
unsigned char *naks;
gettimeofday(¤t_timestamp, NULL);
done = 0;
while (!done) {
found_timeout = 0;
done = 1;
for (i = 0; i < MAXLIST; i++) {
group = &group_list[i];
if (group->group_id != 0) {
if (cmptimestamp(current_timestamp, group->timeout_time) >= 0) {
switch (group->phase) {
case PHASE_REGISTERED:
send_register(group);
break;
case PHASE_RECEIVING:
case PHASE_MIDGROUP:
glog1(group, "Transfer timed out");
send_abort(group, "Transfer timed out");
break;
case PHASE_COMPLETE:
send_complete(group, 0);
break;
}
done = 0;
} else if ((!found_timeout) ||
(cmptimestamp(group->timeout_time,
min_timestamp) < 0)) {
glog5(group, "found min timeout time: %d:%06d",
group->timeout_time.tv_sec,
group->timeout_time.tv_usec);
min_timestamp = group->timeout_time;
found_timeout = 1;
}
// Check for a NAK timeout for sending a STATUS or COMPLETE
if ((group->fileinfo.nak_time.tv_sec != 0) &&
cmptimestamp(current_timestamp,
group->fileinfo.nak_time) >= 0) {
group->fileinfo.nak_time.tv_sec = 0;
group->fileinfo.nak_time.tv_usec = 0;
// Send NAKs
sent_naks = 0;
retry_naks:
for (section = group->fileinfo.nak_section_first;
section < group->fileinfo.nak_section_last;
section++) {
naks = NULL;
nak_count = get_naks(group, section, &naks);
glog3(group, "read %d NAKs for section %d",
nak_count, section);
if (nak_count > 0) {
send_status(group, section, naks, nak_count);
sent_naks = 1;
}
free(naks);
naks = NULL;
}
if (file_done(group, 1)) {
glog2(group, "File transfer complete");
send_complete(group, 0);
file_cleanup(group, 0);
} else if (group->fileinfo.got_done && !sent_naks) {
// We didn't send any NAKs since the last time
// but the server is asking for some,
// so check all prior sections
group->fileinfo.nak_section_last =
group->fileinfo.nak_section_first;
group->fileinfo.nak_section_first = 0;
group->fileinfo.got_done = 0;
goto retry_naks;
}
} else if ((group->fileinfo.nak_time.tv_sec != 0) &&
((!found_timeout) ||
(cmptimestamp(group->fileinfo.nak_time,
min_timestamp) < 0))) {
glog5(group, "found min nak time: %d:%06d",
group->fileinfo.nak_time.tv_sec,
group->fileinfo.nak_time.tv_usec);
min_timestamp = group->fileinfo.nak_time;
found_timeout = 1;
}
// Check congestion control feedback timer
if (!group->isclr) {
if ((group->cc_time.tv_sec != 0) &&
(cmptimestamp(current_timestamp,
group->cc_time) >= 0)) {
send_cc_ack(group);
} else if ((group->cc_time.tv_sec != 0) &&
((!found_timeout) ||
(cmptimestamp(group->cc_time,
min_timestamp) < 0))) {
glog5(group, "found min CC time: %d:%06d",
group->cc_time.tv_sec, group->cc_time.tv_usec);
min_timestamp = group->cc_time;
found_timeout = 1;
}
}
}
}
// Check timeout for proxy key request
if (has_proxy && (proxy_pubkey.key == 0)) {
if (cmptimestamp(current_timestamp, next_keyreq_time) >= 0) {
send_key_req();
done = 0;
} else if ((!found_timeout) ||
(cmptimestamp(next_keyreq_time, min_timestamp) < 0)) {
min_timestamp = next_keyreq_time;
found_timeout = 1;
}
}
// Check timeout for sending heartbeat
if (hbhost_count) {
if (cmptimestamp(current_timestamp, next_hb_time) >= 0) {
send_hb_request(listener, hb_hosts, hbhost_count,
&next_hb_time, hb_interval, uid);
done = 0;
} else if ((!found_timeout) ||
(cmptimestamp(next_hb_time, min_timestamp) < 0)) {
min_timestamp = next_hb_time;
found_timeout = 1;
}
}
}
if (found_timeout) {
tv = diff_timeval(min_timestamp, current_timestamp);
return &tv;
} else {
return NULL;
}
}
/**
* Processes a new incoming ANNOUNCE
*/
void handle_announce(union sockaddr_u *src, unsigned char *packet,
unsigned packetlen, struct timeval rxtime)
{
struct uftp_h *header;
struct announce_h *announce;
uint32_t *addrlist;
int addrlen, rval;
struct group_list_t *group;
time_t t;
struct tm *start_time;
char privname[INET6_ADDRSTRLEN], srcname[INET6_ADDRSTRLEN];
char srcfqdn[DESTNAME_LEN];
header = (struct uftp_h *)packet;
announce = (struct announce_h *)(packet + sizeof(struct uftp_h));
addrlist = (uint32_t *)((unsigned char *)announce + (announce->hlen * 4));
addrlen = (packetlen - sizeof(struct uftp_h) - (announce->hlen * 4)) / 4;
if ((packetlen < sizeof(struct uftp_h) + (announce->hlen * 4U)) ||
((announce->hlen * 4U) < sizeof(struct announce_h))) {
log1(ntohl(header->group_id), header->group_inst, 0,
"Rejecting ANNOUNCE from %08X: invalid message size",
ntohl(header->src_id));
return;
}
if ((addrlen != 0) && (!uid_in_list(addrlist, addrlen))) {
log1(ntohl(header->group_id), header->group_inst, 0,
"Name not in host list");
return;
}
if ((group = find_open_slot()) == NULL ) {
log0(ntohl(header->group_id), header->group_inst, 0,
"Error: maximum number of incoming files exceeded: %d\n", MAXLIST);
return;
}
t = time(NULL);
start_time = localtime(&t);
snprintf(group->start_date, sizeof(group->start_date), "%04d%02d%02d",
start_time->tm_year + 1900,
start_time->tm_mon + 1, start_time->tm_mday);
snprintf(group->start_time, sizeof(group->start_time), "%02d%02d%02d",
start_time->tm_hour, start_time->tm_min, start_time->tm_sec);
if (!read_announce(group, packet, src, rxtime, packetlen)) {
return;
}
if ((rval = getnameinfo((struct sockaddr *)src, family_len(*src),
srcname, sizeof(srcname), NULL, 0, NI_NUMERICHOST)) != 0) {
glog1(group, "getnameinfo failed: %s", gai_strerror(rval));
}
if (!noname) {
if ((rval = getnameinfo((struct sockaddr *)src, family_len(*src),
srcfqdn, sizeof(srcfqdn), NULL, 0, 0)) != 0) {
glog1(group, "getnameinfo failed: %s", gai_strerror(rval));
}
} else {
strncpy(srcfqdn, srcname, sizeof(srcfqdn) - 1);
}
if ((rval = getnameinfo((struct sockaddr *)&group->multi,
family_len(group->multi), privname, sizeof(privname),
NULL, 0, NI_NUMERICHOST)) != 0) {
glog1(group, "getnameinfo failed: %s", gai_strerror(rval));
}
glog2(group, "Received request from %08X at %s (%s)",
ntohl(group->src_id), srcfqdn, srcname);
glog2(group, "Using private multicast address %s", privname);
glog3(group, "grtt = %.6f", group->grtt);
glog3(group, "send time: %d.%06d", group->last_server_ts.tv_sec,
group->last_server_ts.tv_usec);
glog3(group, "receive time: %d.%06d", group->last_server_rx_ts.tv_sec,
group->last_server_rx_ts.tv_usec);
if (status_file) {
fprintf(status_file,
"CONNECT;%04d/%02d/%02d-%02d:%02d:%02d;%08X;%08X;%s;%s\n",
start_time->tm_year + 1900, start_time->tm_mon + 1,
start_time->tm_mday, start_time->tm_hour,
start_time->tm_min, start_time->tm_sec,
ntohl(group->src_id), group->group_id, srcname, srcfqdn);
fflush(status_file);
}
if (group->restart) {
if (group->sync_mode) {
glog1(group, "Sync mode and restart mode incompatible");
send_abort(group, "Sync mode and restart mode incompatible");
return;
}
}
if (!addr_blank(&group->multi)) {
if (server_count > 0) {
if (!is_multicast(&group->multi, 1)) {
glog1(group, "Invalid source specific multicast address: %s",
privname);
send_abort(group, "Invalid source specific multicast address");
return;
}
if (!other_mcast_users(group)) {
if (!multicast_join(listener, group->group_id, &group->multi,
m_interface, interface_count,
server_keys, server_count)) {
send_abort(group, "Error joining multicast group");
return;
}
if (has_proxy) {
if (!multicast_join(listener,group->group_id, &group->multi,
m_interface, interface_count, &proxy_info, 1)) {
send_abort(group, "Error joining multicast group");
return;
}
}
}
} else {
if (!is_multicast(&group->multi, 0)) {
glog1(group, "Invalid multicast address: %s", privname);
send_abort(group, "Invalid multicast address");
return;
}
if (!other_mcast_users(group)) {
if (!multicast_join(listener, group->group_id,
&group->multi, m_interface, interface_count, NULL, 0)) {
send_abort(group, "Error joining multicast group");
return;
}
}
}
group->multi_join = 1;
}
send_register(group);
}
/**
* Sends a CLIENT_KEY message if the server requested it.
* Always sent right after a REGISTER.
*/
void send_client_key(struct group_list_t *group)
{
struct uftp_h *header;
struct client_key_h *client_key;
unsigned char *buf, *keyblob, *verify;
uint8_t *verifydata;
unsigned int siglen, meslen;
int verifylen;
uint16_t bloblen;
buf = safe_calloc(MAXMTU, 1);
header = (struct uftp_h *)buf;
client_key = (struct client_key_h *)(buf + sizeof(struct uftp_h));
keyblob = (unsigned char *)client_key + sizeof(struct client_key_h);
verifydata = build_verify_data(group, &verifylen);
if (!verifydata) {
glog0(group, "Error getting verify data");
send_abort(group, "Error getting verify data");
goto end;
}
set_uftp_header(header, CLIENT_KEY, group);
client_key->func = CLIENT_KEY;
if ((group->keyextype == KEYEX_RSA) ||
(group->keyextype == KEYEX_ECDH_RSA)) {
if (!export_RSA_key(group->client_privkey.rsa, keyblob, &bloblen)) {
glog0(group, "Error exporting public key");
send_abort(group, "Error exporting public key");
goto end;
}
verify = keyblob + bloblen;
if (!create_RSA_sig(group->client_privkey.rsa, group->hashtype,
verifydata, verifylen, verify, &siglen)) {
glog0(group, "Error signing verify data");
send_abort(group, "Error signing verify data");
goto end;
}
} else {
if (!export_EC_key(group->client_privkey.ec, keyblob, &bloblen)) {
glog0(group, "Error exporting public key");
send_abort(group, "Error exporting public key");
goto end;
}
verify = keyblob + bloblen;
if (!create_ECDSA_sig(group->client_privkey.ec, group->hashtype,
verifydata, verifylen, verify, &siglen)) {
glog0(group, "Error signing verify data");
send_abort(group, "Error signing verify data");
goto end;
}
}
client_key->bloblen = htons(bloblen);
client_key->siglen = htons(siglen);
client_key->hlen = (sizeof(struct client_key_h) + bloblen + siglen) / 4;
meslen = sizeof(struct uftp_h) + (client_key->hlen * 4);
if (nb_sendto(listener, buf, meslen, 0,
(struct sockaddr *)&(group->replyaddr),
family_len(group->replyaddr)) == SOCKET_ERROR) {
gsockerror(group, "Error sending CLIENT_KEY");
} else {
glog2(group, "CLIENT_KEY sent");
}
end:
free(verifydata);
free(buf);
}
/**
* Clean up a group list entry. Close the file if open,
* free malloc'ed structures, drop the multicast group
* (if no one else is using it) and free the slot.
*/
void file_cleanup(struct group_list_t *group, int abort_session)
{
if (group->fileinfo.fd >= 0) {
glog2(group, "starting file close");
close(group->fileinfo.fd);
glog2(group, "done file close");
group->fileinfo.fd = -1;
if (abort_session && !strcmp(tempdir, "")) {
if (tempfile) {
unlink(group->fileinfo.temppath);
} else {
unlink(group->fileinfo.filepath);
}
} else {
if (tempfile) {
move_to_backup(group);
if (rename(group->fileinfo.temppath,
group->fileinfo.filepath) == -1) {
gsyserror(group, "Couldn't rename from %s to %s",
group->fileinfo.temppath,group->fileinfo.filepath);
}
}
if (group->fileinfo.tstamp) {
utim_buf utbuf;
utbuf.actime = group->fileinfo.tstamp;
utbuf.modtime = group->fileinfo.tstamp;
if (utime(group->fileinfo.filepath, &utbuf) == -1) {
gsyserror(group, "utime failed");
}
}
}
}
if (abort_session || (group->file_id == 0)) {
if (!addr_blank(&group->multi) && !other_mcast_users(group) &&
group->multi_join) {
if (server_count > 0) {
multicast_leave(listener, group->group_id, &group->multi,
m_interface, interface_count, server_keys,server_count);
if (has_proxy) {
multicast_leave(listener, group->group_id, &group->multi,
m_interface, interface_count, &proxy_info, 1);
}
} else {
multicast_leave(listener, group->group_id, &group->multi,
m_interface, interface_count, NULL, 0);
}
}
if (group->server_pubkey.key) {
if (group->keyextype == KEYEX_ECDH_ECDSA) {
free_EC_key(group->server_pubkey.ec);
} else {
free_RSA_key(group->server_pubkey.rsa);
}
}
if (group->server_dhkey.key) {
free_EC_key(group->server_dhkey.ec);
free_EC_key(group->client_dhkey.ec);
}
if (group->restartinfo &&
(strcmp(group->restartinfo->name, ""))) {
// We have unused restart info from the last run.
// Chalk this up as a loss and delete the data file
char filepath[MAXPATHNAME];
snprintf(filepath, sizeof(filepath), "%s%c_group_%08X%c%s", tempdir,
PATH_SEP, group->group_id, PATH_SEP,
group->restartinfo->name);
unlink(filepath);
}
if (abort_session) {
write_restart_file(group);
}
free(group->loss_history);
free(group->fileinfo.naklist);
free(group->fileinfo.section_done);
free(group->fileinfo.cache);
free(group->fileinfo.cache_status);
if (group->restartinfo) {
free(group->restartinfo->naklist);
free(group->restartinfo->section_done);
free(group->restartinfo);
}
memset(group, 0, sizeof(struct group_list_t));
} else {
// Don't clear the file_id in case we need to respond to late DONEs
if (!strcmp(tempdir, "")) {
run_postreceive(group, group->fileinfo.filepath);
}
group->phase = PHASE_MIDGROUP;
set_timeout(group, 0);
free(group->fileinfo.naklist);
free(group->fileinfo.section_done);
free(group->fileinfo.cache);
free(group->fileinfo.cache_status);
group->fileinfo.naklist = NULL;
group->fileinfo.section_done = NULL;
group->fileinfo.cache = NULL;
group->fileinfo.cache_status = NULL;
}
}
/**
* Process an incoming FILEINFO message.
* Expected in the middle of a group with no current file.
*/
void handle_fileinfo(struct group_list_t *group, const unsigned char *message,
unsigned meslen, struct timeval rxtime)
{
stat_struct statbuf;
int found_dir;
if (!read_fileinfo(group, message, meslen, rxtime)) {
return;
}
glog2(group, "Name of file to receive: %s", group->fileinfo.name);
switch (group->fileinfo.ftype) {
case FTYPE_REG:
glog2(group, "Bytes: %s, Blocks: %d, Sections: %d",
printll(group->fileinfo.size),
group->fileinfo.blocks, group->fileinfo.sections);
glog3(group, "small section size: %d, "
"big section size: %d, # big sections: %d",
group->fileinfo.secsize_small, group->fileinfo.secsize_big,
group->fileinfo.big_sections);
break;
case FTYPE_DIR:
glog2(group, "Empty directory");
break;
case FTYPE_LINK:
glog2(group, "Symbolic link to %s", group->fileinfo.linkname);
break;
case FTYPE_DELETE:
glog2(group, "Deleting file/directory");
break;
case FTYPE_FREESPACE:
glog2(group, "Get free space for path");
break;
default:
glog1(group, "Invalid file type: %d", group->fileinfo.ftype);
send_abort(group, "Invalid file type");
return;
}
if (!setup_dest_file(group)) {
// A rejected file is still a success because we responded with a
// COMPLETE with status=rejected instead of with an ABORT
return;
}
// Make sure the path to the destination file exists and
// remove or back up any existing file
if (!create_path_to_file(group, group->fileinfo.filepath)) {
glog0(group, "Error creating path to data file");
early_complete(group, COMP_STAT_REJECTED, 0);
return;
}
found_dir = 0;
if (tempfile && !group->sync_preview) {
clear_path(group->fileinfo.temppath, group);
}
if ((group->fileinfo.ftype != FTYPE_DELETE) ||
(group->fileinfo.ftype != FTYPE_FREESPACE)) {
// Don't do path checks for metafile commands
} else if (lstat_func(group->fileinfo.filepath, &statbuf) != -1) {
glog3(group, "checking existing file");
if ((group->fileinfo.ftype != FTYPE_DIR) || !S_ISDIR(statbuf.st_mode)) {
if ((group->fileinfo.ftype != FTYPE_REG) ||
!S_ISREG(statbuf.st_mode) ||
((!group->restart) && (!group->sync_mode))) {
// Don't clear/backup if we're receiving a regular file
// and we're in either restart mode or sync mode
glog3(group, "calling move_to_backup");
if (!tempfile) {
move_to_backup(group);
}
}
} else {
glog3(group, "found dir");
found_dir = 1;
}
} else if (errno != ENOENT) {
gsyserror(group, "Error checking file %s",group->fileinfo.filepath);
}
switch (group->fileinfo.ftype) {
case FTYPE_REG:
handle_fileinfo_regular(group);
break;
case FTYPE_DIR:
handle_fileinfo_dir(group, found_dir);
break;
case FTYPE_LINK:
handle_fileinfo_link(group);
break;
case FTYPE_DELETE:
handle_fileinfo_delete(group);
break;
case FTYPE_FREESPACE:
handle_fileinfo_freespace(group);
break;
default:
glog0(group, "Error handling FILEINFO: shouldn't get here!");
}
}
/**
* Sends a REGISTER message in response to an ANNOUNCE or on timeout when
* waiting for a KEYINFO or REG_CONF. If the register timeout expired, abort.
*/
void send_register(struct group_list_t *group)
{
struct uftp_h *header;
struct register_h *reg;
unsigned char *buf, *keydata;
struct timeval now, send_time;
unsigned int len, meslen;
union key_t key;
gettimeofday(&now, NULL);
if (cmptimestamp(now, group->expire_time) >= 0) {
glog1(group, "Registration unconfirmed by server");
send_abort(group, "Registration unconfirmed");
return;
}
buf = safe_calloc(MAXMTU, 1);
header = (struct uftp_h *)buf;
reg = (struct register_h *)(buf + sizeof(struct uftp_h));
keydata = (unsigned char *)reg + sizeof(struct register_h);
set_uftp_header(header, REGISTER, group);
reg->func = REGISTER;
if (group->keytype != KEY_NONE) {
memcpy(reg->rand2, group->rand2, RAND_LEN);
if (group->keyextype == KEYEX_RSA) {
if (has_proxy) {
key = proxy_pubkey;
} else {
key = group->server_pubkey;
}
if (!RSA_encrypt(key.rsa, group->premaster, group->premaster_len,
keydata, &len)) {
glog0(group, "Error encrypting premaster secret");
send_abort(group, "Error encrypting premaster secret");
free(buf);
return;
}
} else {
uint16_t keylen;
if (!export_EC_key(group->client_dhkey.ec, keydata, &keylen)) {
glog0(group, "Error exporting ECDH public key");
send_abort(group, "Error exporting ECDH public key");
free(buf);
return;
}
len = keylen;
}
reg->keyinfo_len = htons(len);
} else {
len = 0;
}
gettimeofday(&now, NULL);
if (cmptimestamp(now, group->last_server_rx_ts) <= 0) {
send_time = group->last_server_ts;
} else {
send_time = add_timeval(group->last_server_ts,
diff_timeval(now, group->last_server_rx_ts));
}
reg->tstamp_sec = htonl((uint32_t)send_time.tv_sec);
reg->tstamp_usec = htonl((uint32_t)send_time.tv_usec);
reg->hlen = (sizeof(struct register_h) + len) / 4;
meslen = sizeof(struct uftp_h) + (reg->hlen * 4);
if (nb_sendto(listener, buf, meslen, 0,
(struct sockaddr *)&(group->replyaddr),
family_len(group->replyaddr)) == SOCKET_ERROR) {
gsockerror(group, "Error sending REGISTER");
} else {
glog2(group, "REGISTER sent");
}
glog3(group, "send time: %d.%06d", send_time.tv_sec, send_time.tv_usec);
set_timeout(group, 0);
if (group->client_auth) {
send_client_key(group);
}
free(buf);
}