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server.h
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server.h
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/*
* UFTP - UDP based FTP with multicast
*
* Copyright (C) 2001-2016 Dennis A. Bush, Jr. bush@tcnj.edu
*
* 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.
*/
#ifndef _SERVER_H
#define _SERVER_H
#include "uftp_common.h"
#include "encryption.h"
#define MAXDEST 100000
#define MAXFILES 10000
#define MAXEXCLUDE 500
#define MAXCC 20
#define CLIENT_RTT_MIN 0.001
/**
* Values for deststate_t.status
*/
enum client_status {
DEST_MUTE = -4, /// Expected client that hasn't registered
DEST_LOST = -3, /// Client that timed out responding to a DONE
DEST_ABORT = -2, /// An ABORT was either sent to or received from
DEST_REGISTERED = -1, /// Registered but haven't received INFO_ACK
DEST_ACTIVE = 0, /// Ready to receive data
DEST_ACTIVE_NAK = 1, /// Ready to receive data, sent back NAKs
DEST_DONE = 2 /// Client finished successfully, sent COMPLETE
};
/**
* Destination state for a particular destination and file
*/
struct deststate_t {
int conf_sent; /// False if REG_CONF or DONE_CONF needs to be sent
struct timeval time; /// Time that this client finished
};
/**
* File info struct
*/
struct finfo_t {
int ftype; /// File type (regular, directory, symlink)
const char *basedir; /// Base pathname of file in filesystem
const char *filename; /// Local name of file (may include path)
const char *linkname; /// For symbolic links, the text of the link
const char *destfname; /// Transmitted name of file (may include path)
f_offset_t size; /// File size in bytes
int32_t tstamp; /// Timestamp of file
uint32_t blocks; /// Total blocks in file
uint16_t sections; /// Total sections in file
uint16_t big_sections; /// Number of larger sized sections
uint32_t secsize_small, secsize_big; /// Size of sections
uint32_t group_id; /// Group ID
uint8_t group_inst; /// Group instance ID (restart number)
uint16_t file_id; /// File ID
char *naklist; /// Aggregate NAK list
int partial; /// True if all clients partially received last run
struct deststate_t *deststate; /// Status array for each client
};
/**
* Encryption info for a particular destination
* Only allocated when encryption is enabled and only for proxies and clients
* talking directly to the server. Clients communicating through one or
* more proxies maintain encryption state with the proxy, not the server.
*/
struct encinfo_t {
union key_t pubkey; /// The client's RSA or ECDSA public key
int pubkeylen; /// The client's public key length in bytes
union key_t dhkey; /// The client's ECDH public key
uint8_t verifydata[PUBKEY_LEN]; /// The verify data from a CLIENT_KEY
uint16_t verifylen; /// The length of verifydata in bytes
uint8_t rand2[RAND_LEN]; /// Client's random number
uint8_t premaster[MASTER_LEN]; /// Premaster secret sent by client
int premaster_len; /// Length of premaster secret
uint8_t master[MASTER_LEN]; /// Master key for client
uint8_t hmackey[HMAC_LEN]; /// HMAC key for client
uint8_t key[MAXKEY]; /// Symmetric encryption key for client
uint8_t salt[MAXIV]; /// Salt for block cypher IV for client
};
/**
* Destination info
*/
struct destinfo_t {
char name[DESTNAME_LEN]; /// Hostname of client
uint32_t id; /// UID of client (network byte order)
int proxyidx; /// Index of the proxy serving this client
int isproxy; /// True if this is a proxy
int64_t freespace; /// Free disk space reported by client
int8_t status; /// Specified by a client_status value
int8_t comp_status; /// Completion status as given by COMPLETE
int8_t registered; /// True if we received a REGISTER
int8_t verified; /// True if we have a verified CLIENT_KEY
int num_copy; /// Number of copied files in sync mode
int num_skip; /// Number of skipped files in sync mode
int num_overwrite; /// Number of overwritten files in sync mode
double total_time; /// Total elapsed sending time in sync mode
f_offset_t total_size; /// Total number of bytes sent in sync mode
double rtt; /// RTT to this client
int8_t rtt_measured; /// True if RTT measured this round
int8_t rtt_sent; /// True if RTT sent in a CONG_CTRL
int8_t max_nak_exceed; /// How often client exceeded max naks
int8_t has_fingerprint; /// True if we have client's key fingerprint
uint8_t keyfingerprint[HMAC_LEN]; /// Fingerprint of RSA key
struct encinfo_t *encinfo; /// If encryption enabled, encryption info
};
/**
* Header of server restart file.
* Followed in the file by filecount file names of MAXPATHNAME length,
* followed by an arbitrary number of server_restart_host_t entries.
*/
struct server_restart_t {
uint32_t group_id; /// Group ID of failed transfer
uint8_t group_inst; /// Group instance ID of failed transfer
int filecount; /// Number of files specified on cmdline
};
/**
* Server restart file entry for a particular host.
*/
struct server_restart_host_t {
char name[DESTNAME_LEN]; /// Hostname of client
uint32_t id; /// UID of client (network byte order)
int has_fingerprint; /// True if we have client's key fingerprint
uint8_t keyfingerprint[HMAC_LEN]; /// Fingerprint of RSA key
int is_proxy; /// True if this is a proxy
};
/**
* Global command line values and sockets
*/
extern SOCKET sock;
extern union sockaddr_u listen_dest, receive_dest;
extern int max_rate, min_rate, init_rate, rate;
extern int rcvbuf, packet_wait, txweight, max_nak_pct, max_passes;
extern int client_auth, quit_on_error, dscp, follow_links, max_nak_cnt;
extern int save_fail, restart_groupid, restart_groupinst, files_sent;
extern int sync_mode, sync_preview, dest_is_dir, cc_type, user_abort;
extern unsigned int ttl;
extern char port[PORTNAME_LEN], srcport[PORTNAME_LEN];
extern char pub_multi[INET6_ADDRSTRLEN], priv_multi[INET6_ADDRSTRLEN];
extern char keyfile[MAXPATHNAME];
extern char filelist[MAXFILES][MAXPATHNAME], exclude[MAXEXCLUDE][MAXPATHNAME];
extern char basedir[MAXDIR][MAXDIRNAME], destfname[MAXPATHNAME];
extern char statusfilename[MAXPATHNAME];
extern FILE *status_file;
extern struct iflist ifl[MAX_INTERFACES];
extern int keytype, hashtype, sigtype, keyextype, newkeylen, sys_keys;
extern int blocksize, datapacketsize;
extern int ifl_len, destcount, filecount, excludecount, basedircount;
extern struct iflist out_if;
extern struct destinfo_t destlist[MAXDEST];
extern int robust;
extern double grtt, min_grtt, max_grtt;
extern uint16_t send_seq;
extern uint32_t server_id;
/**
* Encryption variables
*/
extern union key_t privkey, dhkey;
extern unsigned char rand1[RAND_LEN], groupmaster[MASTER_LEN];
extern uint8_t groupsalt[MAXIV], groupkey[MAXKEY], grouphmackey[HMAC_LEN];
extern uint64_t ivctr;
extern int ivlen, keylen, hmaclen, privkeylen;
extern uint8_t ecdh_curve, ecdsa_curve;
/**
* Variables shared between the sending and receiving threads
* Defined in server_phase.c
*/
extern mux_t mux_main;
extern int rate_change;
extern uint32_t current_position;
extern uint32_t rewind_to;
extern uint16_t cc_seq;
extern uint32_t cc_rate;
extern double adv_grtt;
extern int slowstart, clr, clr_drop, new_rate;
extern struct timeval last_clr_time;
#endif // _SERVER_H