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client_transfer.c
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/*
* UFTP - UDP based FTP with multicast
*
* Copyright (C) 2001-2016 Dennis A. Bush, Jr. [email protected]
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this program, or any covered work, by linking or
* combining it with the OpenSSL project's OpenSSL library (or a
* modified version of that library), containing parts covered by the
* terms of the OpenSSL or SSLeay licenses, the copyright holder
* grants you additional permission to convey the resulting work.
* Corresponding Source for a non-source form of such a combination
* shall include the source code for the parts of OpenSSL used as well
* as that of the covered work.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <math.h>
#include <time.h>
#ifdef WINDOWS
#include <io.h>
#include <direct.h>
#include "win_func.h"
#else // if WINDOWS
#include <sys/time.h>
#include <unistd.h>
#include <dirent.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#endif
#include "client.h"
#include "client_common.h"
#include "client_transfer.h"
void move_files_individual(struct group_list_t *group, const char *local_temp,
char *local_dest);
/**
* Moves a file from the temp to the destination directory
*/
void move_file_individual(struct group_list_t *group, const char *local_temp,
const char *local_dest, const char *filename)
{
char temppath[MAXPATHNAME], destpath[MAXPATHNAME];
stat_struct temp_stat, dest_stat;
int len, found_dir;
len = snprintf(temppath, sizeof(temppath), "%s%c%s", local_temp,
PATH_SEP, filename);
if ((len >= sizeof(temppath)) || (len == -1)) {
glog0(group, "Max pathname length exceeded: %s%c%s", local_temp,
PATH_SEP, filename);
return;
}
len = snprintf(destpath, sizeof(destpath), "%s%c%s", local_dest,
PATH_SEP, filename);
if ((len >= sizeof(destpath)) || (len == -1)) {
glog0(group, "Max pathname length exceeded: %s%c%s", local_dest,
PATH_SEP, filename);
return;
}
if (lstat_func(temppath, &temp_stat) == -1) {
gsyserror(group, "Error getting file status for %s", temppath);
return;
}
if (S_ISDIR(temp_stat.st_mode)) {
found_dir = 0;
if (lstat_func(destpath, &dest_stat) != -1) {
if (!S_ISDIR(dest_stat.st_mode)) {
clear_path(destpath, group);
} else {
found_dir = 1;
}
}
if (!found_dir) {
if (mkdir(destpath, 0755) == -1) {
gsyserror(group, "Failed to create directory %s", destpath);
return;
}
}
move_files_individual(group, temppath, destpath);
} else {
clear_path(destpath, group);
#ifdef WINDOWS
if (!MoveFile(temppath, destpath)) {
char errbuf[300];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL,
GetLastError(), 0, errbuf, sizeof(errbuf),NULL);
glog0(group, "error (%d): %s", GetLastError(), errbuf);
}
#else
if (rename(temppath, destpath) == -1) {
gsyserror(group, "Couldn't move file");
}
#endif
run_postreceive(group, destpath);
}
}
/**
* Move all files from temp to destination directory if at end of group.
* Called recursively to move each file individually.
*/
void move_files_individual(struct group_list_t *group, const char *local_temp,
char *local_dest)
{
int emptydir;
{
#ifdef WINDOWS
intptr_t ffhandle;
struct _finddatai64_t finfo;
char dirglob[MAXPATHNAME];
snprintf(dirglob, sizeof(dirglob), "%s%c*", local_temp, PATH_SEP);
if ((ffhandle = _findfirsti64(dirglob, &finfo)) == -1) {
gsyserror(group, "Failed to open directory %s", dirglob);
return;
}
emptydir = 1;
do {
if (strcmp(finfo.name, ".") && strcmp(finfo.name, "..")) {
emptydir = 0;
move_file_individual(group, local_temp, local_dest, finfo.name);
}
} while (_findnexti64(ffhandle, &finfo) == 0);
_findclose(ffhandle);
#else
DIR *dir;
struct dirent *de;
if ((dir = opendir(local_temp)) == NULL) {
gsyserror(group, "Failed to open directory %s", local_temp);
return;
}
emptydir = 1;
// errno needs to be set to 0 before calling readdir, otherwise
// we'll report a false error when we exhaust the directory
while ((errno = 0, de = readdir(dir)) != NULL) {
if (strcmp(de->d_name, ".") && strcmp(de->d_name, "..")) {
emptydir = 0;
move_file_individual(group, local_temp, local_dest, de->d_name);
}
}
if (errno && (errno != ENOENT)) {
gsyserror(group, "Failed to read directory %s", tempdir);
}
closedir(dir);
#endif
}
if (emptydir) {
run_postreceive(group, local_dest);
}
if (rmdir(local_temp) == -1) {
gsyserror(group, "Failed remove temp directory %s", local_temp);
}
}
/**
* Move all files from temp to destination directory if at end of group
*/
void move_files(struct group_list_t *group)
{
char temppath[MAXPATHNAME], destpath[MAXPATHNAME];
char *filelist[10000]; // TODO: no magic number
int len, filecount, i;
if (!strcmp(tempdir, "") || (group->file_id != 0)) {
return;
}
if (move_individual) {
len = snprintf(temppath, sizeof(temppath), "%s%c_group_%08X",
tempdir, PATH_SEP, group->group_id);
if ((len >= sizeof(temppath)) || (len == -1)) {
glog0(group, "Max pathname length exceeded: %s%c_group_%08X",
tempdir, PATH_SEP, group->group_id);
} else {
move_files_individual(group, temppath, destdir[0]);
}
return;
}
{
#ifdef WINDOWS
intptr_t ffhandle;
struct _finddatai64_t finfo;
char dirglob[MAXPATHNAME];
snprintf(dirglob, sizeof(dirglob), "%s%c_group_%08X%c*", tempdir,
PATH_SEP, group->group_id, PATH_SEP);
if ((ffhandle = _findfirsti64(dirglob, &finfo)) == -1) {
gsyserror(group, "Failed to open directory %s", dirglob);
return;
}
filecount = 0;
do {
len = snprintf(temppath, sizeof(temppath), "%s%c_group_%08X%c%s",
tempdir, PATH_SEP, group->group_id,
PATH_SEP, finfo.name);
if ((len >= sizeof(temppath)) || (len == -1)) {
glog0(group,"Max pathname length exceeded: %s%c_group_%08X%c%s",
tempdir, PATH_SEP, group->group_id, PATH_SEP, finfo.name);
continue;
}
len = snprintf(destpath, sizeof(destpath), "%s%c%s",
destdir[0], PATH_SEP, finfo.name);
if ((len >= sizeof(destpath)) || (len == -1)) {
glog0(group, "Max pathname length exceeded: %s%c%s",
destdir[0], PATH_SEP, finfo.name);
continue;
}
// do the move
if (strcmp(finfo.name, ".") && strcmp(finfo.name, "..")) {
clear_path(destpath, group);
if (!MoveFile(temppath, destpath)) {
char errbuf[300];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL,
GetLastError(), 0, errbuf, sizeof(errbuf), NULL);
glog0(group, "error (%d): %s", GetLastError(), errbuf);
}
filelist[filecount] = strdup(destpath);
if (filelist[filecount] == NULL) {
gsyserror(group, "strdup failed!");
exit(ERR_ALLOC);
}
filecount++;
}
} while (_findnexti64(ffhandle, &finfo) == 0);
_findclose(ffhandle);
#else
DIR *dir;
struct dirent *de;
char dirname[MAXPATHNAME];
snprintf(dirname, sizeof(dirname), "%s%c_group_%08X", tempdir,
PATH_SEP, group->group_id);
if ((dir = opendir(dirname)) == NULL) {
gsyserror(group, "Failed to open directory %s", dirname);
return;
}
filecount = 0;
// errno needs to be set to 0 before calling readdir, otherwise
// we'll report a false error when we exhaust the directory
while ((errno = 0, de = readdir(dir)) != NULL) {
len = snprintf(temppath, sizeof(temppath), "%s%c%s", dirname,
PATH_SEP, de->d_name);
if ((len >= sizeof(temppath)) || (len == -1)) {
glog0(group, "Max pathname length exceeded: %s%c%s", dirname,
PATH_SEP, de->d_name);
continue;
}
len = snprintf(destpath, sizeof(destpath), "%s%c%s", destdir[0],
PATH_SEP, de->d_name);
if ((len >= sizeof(destpath)) || (len == -1)) {
glog0(group, "Max pathname length exceeded: %s%c%s", destdir[0],
PATH_SEP, de->d_name);
continue;
}
if (strcmp(de->d_name, ".") && strcmp(de->d_name, "..")) {
clear_path(destpath, group);
if (rename(temppath, destpath) == -1) {
gsyserror(group, "Couldn't move file");
}
filelist[filecount] = strdup(destpath);
if (filelist[filecount] == NULL) {
gsyserror(group, "strdup failed!");
exit(ERR_ALLOC);
}
filecount++;
}
}
if (errno && (errno != ENOENT)) {
gsyserror(group, "Failed to read directory %s", dirname);
}
closedir(dir);
#endif
}
run_postreceive_multi(group, filelist, filecount);
for (i = 0; i < filecount; i++) {
free(filelist[i]);
}
snprintf(temppath, sizeof(temppath), "%s%c_group_%08X", tempdir,
PATH_SEP, group->group_id);
if (rmdir(temppath) == -1) {
gsyserror(group, "Failed remove temp directory %s", temppath);
}
}
/**
* Sets the fields in a EXT_TFMCC_ACK_INFO extension for transmission
*/
void set_tfmcc_ack_info(struct group_list_t *group,
struct tfmcc_ack_info_he *tfmcc)
{
struct timeval now, send_time;
unsigned ccrate;
tfmcc->exttype = EXT_TFMCC_ACK_INFO;
tfmcc->extlen = sizeof(struct tfmcc_ack_info_he) / 4;
tfmcc->cc_seq = htons(group->ccseq);
ccrate = current_cc_rate(group);
glog4(group, "ccrate=%d", ccrate);
tfmcc->cc_rate = htons(quantize_rate(ccrate));
//tfmcc->cc_rate = htons(quantize_rate(current_cc_rate(group)));
tfmcc->flags = 0;
if (group->slowstart) {
tfmcc->flags |= FLAG_CC_START;
}
if (group->rtt != 0.0) {
tfmcc->flags |= FLAG_CC_RTT;
}
tfmcc->client_id = uid;
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));
}
tfmcc->tstamp_sec = htonl((uint32_t)send_time.tv_sec);
tfmcc->tstamp_usec = htonl((uint32_t)send_time.tv_usec);
}
/**
* 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);
}
/**
* Sets the fields in a EXT_FREESPACE_INFO extension for transmission
*/
void set_freespace_info(struct group_list_t *group,
struct freespace_info_he *freespace)
{
int64_t disk_space;
disk_space = free_space(group->fileinfo.filepath);
freespace->exttype = EXT_FREESPACE_INFO;
freespace->extlen = sizeof(struct freespace_info_he) / 4;
freespace->freespace_hi = htonl((uint32_t)(disk_space >> 32));
freespace->freespace_lo = htonl((uint32_t)(disk_space & 0xFFFFFFFF));
}
/**
* Writes file result data to status file
*/
void print_result_status(struct group_list_t *group)
{
struct tm *done_time;
time_t t;
if (!status_file) return;
t = time(NULL);
done_time = localtime(&t);
fprintf(status_file,
"RESULT;%04d/%02d/%02d-%02d:%02d:%02d;%08X;%08X;%s;%sKB",
done_time->tm_year + 1900, done_time->tm_mon + 1,
done_time->tm_mday, done_time->tm_hour, done_time->tm_min,
done_time->tm_sec, ntohl(group->src_id), group->group_id,
group->fileinfo.name, printll(group->fileinfo.size / 1024));
switch (group->fileinfo.comp_status) {
case COMP_STAT_NORMAL:
fprintf(status_file, ";copied\n");
break;
case COMP_STAT_SKIPPED:
fprintf(status_file, ";skipped\n");
break;
case COMP_STAT_OVERWRITE:
fprintf(status_file, ";overwritten\n");
break;
case COMP_STAT_REJECTED:
fprintf(status_file, ";rejected\n");
break;
default:
fprintf(status_file, ";unknown\n");
break;
}
fflush(status_file);
}
/**
* 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 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);
}
/**
* Starts a new feedback round under TFMCC
*/
void init_tfmcc_fb_round(struct group_list_t *group, uint16_t new_ccseq)
{
double urand, backoff;
group->ccseq = new_ccseq;
urand = (double)(rand32() + 0.0) / 0xFFFFFFFF;
if (urand == 0.0) urand = 1.0;
backoff = 6 * group->grtt * (1 + log(urand) / log(group->gsize));
if (backoff < 0) backoff = 0.0;
gettimeofday(&group->cc_time, NULL);
add_timeval_d(&group->cc_time, (backoff > 0) ? backoff : 0);
group->initrate = current_cc_rate(group);
glog3(group, "Starting feedback round %d: backoff = %.3f, initrate = %d",
new_ccseq, backoff, group->initrate);
}
/**
* Reads a EXT_TFMCC_DATA_INFO extension in a FILESEG message
*/
void handle_tfmcc_data_info(struct group_list_t *group,
const struct tfmcc_data_info_he *tfmcc)
{
uint32_t ccrate;
uint16_t new_ccseq;
new_ccseq = ntohs(tfmcc->cc_seq);
ccrate = unquantize_rate(ntohs(tfmcc->cc_rate));
if (((int16_t)(new_ccseq - group->ccseq)) > 0) {
init_tfmcc_fb_round(group, new_ccseq);
} else if ((group->cc_time.tv_sec != 0) &&
((ccrate < current_cc_rate(group)) || (ccrate < group->initrate)) &&
(group->grtt > group->rtt)) {
glog4(group, "Canceling feedback timer");
group->cc_time.tv_sec = 0;
group->cc_time.tv_usec = 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;
}
if ((group->fileinfo.cache_end == group->fileinfo.blocks - 1) &&
(group->fileinfo.size % group->blocksize != 0)) {
group->fileinfo.cache_len = ((group->fileinfo.cache_end -
group->fileinfo.cache_start) * group->blocksize) +
(group->fileinfo.size % group->blocksize);
} else {
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);
}
/**
* Returns 1 if a file has been completely received, 0 otherwise
*/
int file_done(struct group_list_t *group, int detail)
{
unsigned int section_offset, blocks_this_sec, section, block, nakidx;
if ((group->phase == PHASE_MIDGROUP) || (group->file_id == 0)) {
return 1;
}
flush_disk_cache(group);
for (section = 0; section < group->fileinfo.sections; section++) {
if (!group->fileinfo.section_done[section]) {
if (!detail) {
return 0;
}
if (section >= group->fileinfo.big_sections) {
section_offset = (group->fileinfo.big_sections *
group->fileinfo.secsize_big) +
((section - group->fileinfo.big_sections) *
group->fileinfo.secsize_small);
blocks_this_sec = group->fileinfo.secsize_small;
} else {
section_offset = section * group->fileinfo.secsize_big;
blocks_this_sec = group->fileinfo.secsize_big;
}
for (block = 0; block < blocks_this_sec; block++) {
nakidx = block + section_offset;
if (group->fileinfo.naklist[nakidx]) {
return 0;
}
}
group->fileinfo.section_done[section] = 1;
}
}
return 1;
}
/**
* Build the NAK list for a given section. Returns the NAK count.
*/
unsigned int get_naks(struct group_list_t *group,
unsigned int section, unsigned char **naks)
{
unsigned int section_offset, blocks_this_sec, i;
unsigned int nakidx, naklistidx, numnaks;
if ((group->phase == PHASE_MIDGROUP) || (group->file_id == 0) ||
(group->fileinfo.section_done[section])) {
*naks = NULL;
return 0;
}
flush_disk_cache(group);
if (section >= group->fileinfo.big_sections) {
section_offset = (group->fileinfo.big_sections *
group->fileinfo.secsize_big) +
((section - group->fileinfo.big_sections) *
group->fileinfo.secsize_small);
blocks_this_sec = group->fileinfo.secsize_small;
} else {
section_offset = section * group->fileinfo.secsize_big;
blocks_this_sec = group->fileinfo.secsize_big;
}
glog3(group, "getting naks: section: %d, offset: %d, blocks: %d",
section, section_offset, blocks_this_sec);
*naks = safe_calloc(group->blocksize, 1);
// Build NAK list
numnaks = 0;
for (i = 0; i < blocks_this_sec; i++) {
nakidx = i + section_offset;
naklistidx = i;
if (group->fileinfo.naklist[nakidx]) {
glog4(group, "NAK for %d", nakidx);
// Each bit represents a NAK; set each one we have a NAK for
// Simplified: *naks[naklistidx / 8] |= (1 << (naklistidx % 8))
(*naks)[naklistidx >> 3] |= (1 << (naklistidx & 7));
numnaks++;
}
}
// Highly verbose debugging -- print NAK list to send
if (log_level >= 5) {
for (i = 0; i < group->blocksize; i++) {
sclog5("%02X ", (*naks)[i]);
if (i % 25 == 24) slog5("");
}
slog5("");
}
if (numnaks == 0) {
group->fileinfo.section_done[section] = 1;
}
return numnaks;
}
/**
* Processes an expected DONE message
*/
void handle_done(struct group_list_t *group, const unsigned char *message,
unsigned meslen)
{
const struct done_h *done;
const uint32_t *addrlist;
unsigned int section, listlen;
done = (const struct done_h *)message;
addrlist = (const uint32_t *)(message + (done->hlen * 4));
listlen = (meslen - (done->hlen * 4)) / 4;
if ((meslen < (done->hlen * 4U)) ||
((done->hlen * 4U) < sizeof(struct done_h))) {
glog2(group, "Rejecting DONE: invalid message size");
return;
}
section = ntohs(done->section);
if ((ntohs(done->file_id) != group->file_id) &&
(ntohs(done->file_id) != 0) && (group->phase != PHASE_MIDGROUP)) {
// Silently reject if not for this file and not end of group
return;
}
if (ntohs(done->file_id) == 0) {
// We're at end of group, so set local file_id=0 to flag this
group->file_id = 0;
}
if (group->file_id) {
glog2(group, "Got DONE message for section %d", section);
} else {
glog2(group, "Got DONE message for group");
}
if (uid_in_list(addrlist, listlen)) {
if (group->file_id == 0) {
glog2(group, "Group complete");
group->phase = PHASE_COMPLETE;
group->fileinfo.comp_status = COMP_STAT_NORMAL;
gettimeofday(&group->expire_time, NULL);
if (4 * group->robust * group->grtt < 1.0) {
add_timeval_d(&group->expire_time, 1.0);
} else {
add_timeval_d(&group->expire_time,
4 * group->robust * group->grtt);
}
send_complete(group, 0);
} else {
if (file_done(group, 1)) {
glog2(group, "File transfer complete");
group->fileinfo.nak_time.tv_sec = 0;
group->fileinfo.nak_time.tv_usec = 0;
send_complete(group, 0);
if (group->phase != PHASE_MIDGROUP) {
print_result_status(group);
}
file_cleanup(group, 0);
} else if (group->fileinfo.nak_time.tv_sec == 0) {
gettimeofday(&group->fileinfo.nak_time, NULL);
if (group->fileinfo.restart && !group->fileinfo.got_data) {
// send STATUS right away at start of restart mode
glog4(group, "First DONE for restart, set nak_time to now");
group->fileinfo.got_data = 1;
} else {
glog4(group, "Setting nak_time to trigger in %.6f",
group->grtt);
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 + 1;
group->fileinfo.got_done = 1;
glog3(group, "Got DONE for client, "
"set NAK timer for sections %d - %d",
group->fileinfo.nak_section_first,
group->fileinfo.nak_section_last);
}
group->fileinfo.last_section = section + 1;
}
} else if (group->phase != PHASE_MIDGROUP) {
if ((section + 1 > 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 + 1;
group->fileinfo.got_done = 0;
glog3(group, "Got DONE, set NAK timer for sections %d - %d",
group->fileinfo.nak_section_first,
group->fileinfo.nak_section_last);
}
group->fileinfo.last_section = section + 1;
}
set_timeout(group, 0);
}
/**