若该文为原创文章，转载请注明原文出处
一、前言
最段时间，在开发IPC时，突然想到把录制好的MP4文件上传到服务器，考虑了一些方法，感觉用TFP方式比较好，可以下载和上传文件，只需要搭建一个简单的FTP服务器就可以测试。
记录一下TFP使用的过程, 使用FTPlib测试。服务器是使用FileZilla在本地搭建的，没有在公网测试。
二、硬件和开发环境
1、硬件：T31X+SC5235
2、开发环境： ubuntu16.04-64bit
3、编译器：mips-gcc540-glibc222-32bit-r3.3.0.tar.gz
注：板子和和WIFI模块是某淘上淘的，使用的是RTL8188，使用的是USB接口，uboot和内核是自己裁剪移植的，内核默认自带WIFI驱动，所以不用移植可以直接使用。
三、FTPLIB使用流程
1、FTP下载地址
https://mbpfaus.net/~pfau/ftplib/2、FTP代码结构说明
ftplib代码量比较小(总共也就1500行左右代码)，主要有2个函数构成，ftplib.c和ftplib.h文件，还有一个测试程序qftp.c文件。
其中，ftplib最主要的一个结构就是NetBuf结构体了，它是ftplib的整个操作核心，包括了一下FTP相关的操作成员等，如下：
struct NetBuf {
char *cput,*cget; /* cput和cget指向该buf的接收缓冲区 */
int handle; /* 待处理的文件描述符(比如在handle上设置的select I/O复用) */
int cavail,cleft; /* cavail 可用的字节数，*/
char *buf; /* 读写缓冲区 */
int dir; /* 表明执行的操作，比如write操作时，dir为FTPLIB_WRITE，read操作时，dir为FTPLIB_READ*/
netbuf *ctrl; /* 指向控制连接的netbuf */
netbuf *data; /* 指向数据连接的netbuf */
int cmode; /* connection mode 连接模式 可选值：FTPLIB_PASSIVE(被动传输模式) FTPLIB_PORT(主动传输模式) */
struct timeval idletime; /* IO复用函数的超时时间，暂时看到select用到了 */
FtpCallback idlecb; /* 回调函数，用于IO复用函数的等待 */
void *idlearg; /* 传递给idlecb回调函数的参数 */
unsigned long int xfered;
unsigned long int cbbytes; /* 回调函数传输的字节数 */
unsigned long int xfered1;
char response[RESPONSE_BUFSIZ]; /* 存放服务器的应答数据*/
};FTP的控制操作有两个连接，一个是控制连接，负责命令的传输；另一个是数据连接，负责数据的收发等，比如上传下载等就是走的数据连接。
3、FTP Libray
FTPlib Client FTP Library
使用的库相对比较少
基本流程，初始化，连接，登录，上传/下载文件。
四、代码
1、qftp.c
/***************************************************************************/
/* */
/* qftp.c - command line driven ftp file transfer program */
/* Copyright (C) 1996-2001, 2013, 2016 Thomas Pfau, tfpfau@gmail.com */
/* 1407 Thomas Ave, North Brunswick, NJ, 08902 */
/* */
/* This library is free software. You can redistribute it and/or */
/* modify it under the terms of the Artistic License 2.0. */
/* */
/* This library 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 */
/* Artistic License 2.0 for more details. */
/* */
/* See the file LICENSE or */
/* http://www.perlfoundation.org/artistic_license_2_0 */
/* */
/***************************************************************************/
#if defined(__unix__) || defined(__VMS)
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <sys/stat.h>
#if defined(_WIN32)
#include <winsock.h>
#include <io.h>
#include "getopt.h"
#endif
#include "ftplib.h"
#if !defined(S_ISDIR)
#define S_ISDIR(m) ((m&S_IFMT) == S_IFDIR)
#endif
/* exit values */
#define EX_SYNTAX 2 /* command syntax errors */
#define EX_NETDB 3 /* network database errors */
#define EX_CONNECT 4 /* network connect errors */
#define EX_LOGIN 5 /* remote login errors */
#define EX_REMCMD 6 /* remote command errors */
#define EX_SYSERR 7 /* system call errors */
#define FTP_SEND 1 /* send files */
#define FTP_GET 2 /* retreive files */
#define FTP_DIR 3 /* verbose directory */
#define FTP_RM 4 /* delete files */
#define FTP_LIST 5 /* terse directory */
#define DIRBUF_SIZE 1024 /* for wildcard processing */
#if defined(__UINT64_MAX)
#if defined(PRIu64)
#define PRIFSZ PRIu64
#else
#if ULONG_MAX == __UINT32_MAX
#define PRIFSZ "llu"
#else
#define PRIFSZ "lu"
#endif
#endif
#else
#ifdef PRIu32
#define PRIFSZ PRIu32
#else
#define PRIFSZ "u"
#endif
#endif
static int logged_in = 0;
static char *host = NULL;
static char *user = NULL;
static char *pass = NULL;
static char mode = 'I';
static int action = 0;
static char *invocation;
static netbuf *conn = NULL;
static int wildcard = 0;
static int strippath = 0;
void usage(void)
{
printf(
"usage: %s <cmd> <host>\n"
"\t cmd = send | get | dir | list | rm\n"
"\t[ -l user [ -p pass ] ] defaults to anonymous/user@hostname\n"
"\t[\n"
"\t [ -v level ] debug level\n"
"\t [ -r rootpath ] chdir path\n"
"\t [ -m umask ] umask for created files\n"
"\t [ -a | -i ] ] ascii/image transfer file\n"
"\t [ -w ] toggle wildcard mode\n"
"\t [ -s cmd ] issue a SITE command\n"
"\t [ -b ] toggles stripping of path from filename on send\n"
"\t [ file ] file spec for directory or file to transfer\n"
"\t]...\n\n"
"If no files are specified on command line, the program\n"
"will read file names from stdin.\n", invocation);
}
void ftp_connect(void)
{
if (conn)
return;
if (host == NULL)
{
fprintf(stderr,"Host name not specified\n");
usage();
exit(EX_SYNTAX);
}
if (!logged_in)
{
if (user == NULL)
{
user = "anonymous";
if (pass == NULL)
{
char *u,h[64];
u = getenv("USER");
if (gethostname(h,64) < 0)
{
perror("gethostname");
exit(EX_NETDB);
}
if ((u != NULL) && (h != NULL))
{
static char xxx[256];
sprintf(xxx,"%s@%s",u,h);
pass = xxx;
}
}
}
else if (pass == NULL)
#if defined(_WIN32) || defined(VMS)
exit(EX_LOGIN);
#else
if ((pass = getpass("Password: ")) == NULL)
exit(EX_SYSERR);
#endif
if (!FtpConnect(host,&conn))
{
fprintf(stderr,"Unable to connect to node %s\n",host);
exit(EX_CONNECT);
}
if (!FtpLogin(user,pass,conn))
{
fprintf(stderr,"Login failure\n%s",FtpLastResponse(conn));
exit(EX_LOGIN);
}
logged_in++;
}
}
void change_directory(char *root)
{
ftp_connect();
if (!FtpChdir(root, conn))
{
fprintf(stderr,"Change directory failed\n%s",FtpLastResponse(conn));
exit(EX_REMCMD);
}
}
void site_cmd(char *cmd)
{
ftp_connect();
if (!FtpSite( cmd, conn ))
{
fprintf(stderr,"SITE command failed\n%s", FtpLastResponse(conn));
exit(EX_REMCMD);
}
}
struct REMFILE {
struct REMFILE *next;
fsz_t fsz;
char *fnm;
};
static int log_progress(netbuf *ctl, fsz_t xfered, void *arg)
{
struct REMFILE *f = (struct REMFILE *) arg;
if ( f->fsz )
{
double pct = (xfered * 100.0) / f->fsz;
printf("%s %5.2f%% %" PRIFSZ "\r", f->fnm, pct, xfered);
}
else
{
printf("%s %" PRIFSZ "\r", f->fnm, xfered);
}
fflush(stdout);
return 1;
}
void process_file(char *fnm)
{
int sts=0;
fsz_t fsz;
struct REMFILE *filelist = NULL;
struct REMFILE rem;
ftp_connect();
FtpClearCallback(conn);
if ((action == FTP_SEND) || (action == FTP_GET) || (action == FTP_RM))
{
if (action == FTP_SEND)
{
struct stat info;
if (stat(fnm,&info) == -1)
{
perror(fnm);
return;
}
if (S_ISDIR(info.st_mode))
{
if (!FtpMkdir(fnm, conn))
fprintf(stderr,"mkdir %s failed\n%s",fnm,FtpLastResponse(conn));
else
if (ftplib_debug)
fprintf(stderr,"Directory %s created\n",fnm);
return;
}
fsz = info.st_size;
}
else
{
if (!wildcard)
{
struct REMFILE *f;
f = (struct REMFILE *) malloc(sizeof(struct REMFILE));
memset(f,0,sizeof(struct REMFILE));
f->next = filelist;
filelist = f;
f->fnm = strdup(fnm);
} else {
netbuf *dir;
char *buf;
if (!FtpAccess(fnm, FTPLIB_DIR, FTPLIB_ASCII, conn, &dir))
{
fprintf(stderr,"error requesting directory of %s\n%s\n",
fnm, FtpLastResponse(conn));
return;
}
buf = malloc(DIRBUF_SIZE);
while (FtpRead(buf, DIRBUF_SIZE, dir) > 0)
{
struct REMFILE *f;
char *p;
f = (struct REMFILE *) malloc(sizeof(struct REMFILE));
memset(f,0,sizeof(struct REMFILE));
f->next = filelist;
p = strchr(buf,'\n');
if (p)
*p = '\0';
f->fnm = strdup(buf);
filelist = f;
}
free(buf);
FtpClose(dir);
}
}
}
switch (action)
{
case FTP_DIR :
sts = FtpDir(NULL, fnm, conn);
break;
case FTP_LIST :
sts = FtpNlst(NULL, fnm, conn);
break;
case FTP_SEND :
rem.next = NULL;
rem.fnm = fnm;
rem.fsz = fsz;
fsz /= 100;
if (fsz > 100000)
fsz = 100000;
if (ftplib_debug && fsz)
{
FtpCallbackOptions opt;
opt.cbFunc = log_progress;
opt.cbArg = &rem;
opt.idleTime = 1000;
opt.bytesXferred = fsz;
FtpSetCallback(&opt,conn);
}
sts = FtpPut(fnm,strippath ? basename(fnm) : fnm,mode,conn);
if (ftplib_debug && sts)
printf("%s sent\n",fnm);
break;
case FTP_GET :
while (filelist)
{
struct REMFILE *f = filelist;
filelist = f->next;
#if defined(__UINT64_MAX)
if (!FtpSizeLong(f->fnm, &fsz, mode, conn))
#else
if (!FtpSize(f->fnm, &fsz, mode, conn))
#endif
fsz = 0;
f->fsz = fsz;
fsz /= 100;
if (fsz > 100000)
fsz = 100000;
if ( fsz == 0 )
fsz = 32768;
if (ftplib_debug)
{
FtpCallbackOptions opt;
opt.cbFunc = log_progress;
opt.cbArg = f;
opt.idleTime = 1000;
opt.bytesXferred = fsz;
FtpSetCallback(&opt,conn);
}
sts = FtpGet(f->fnm,f->fnm,mode,conn);
if (ftplib_debug && sts)
printf("%s retrieved\n",f->fnm);
free(f->fnm);
free(f);
}
break;
case FTP_RM :
while (filelist)
{
struct REMFILE *f = filelist;
filelist = f->next;
sts = FtpDelete(f->fnm,conn);
if (ftplib_debug && sts)
printf("%s deleted\n", f->fnm);
free(f->fnm);
free(f);
}
break;
}
if (!sts)
printf("ftp error\n%s\n",FtpLastResponse(conn));
return;
}
void set_umask(char *m)
{
char buf[80];
sprintf(buf,"umask %s", m);
ftp_connect();
FtpSite(buf, conn);
}
int main(int argc, char *argv[])
{
int files_processed = 0;
int opt;
invocation = argv[0];
optind = 1;
if (strstr(argv[0],"send") != NULL)
action = FTP_SEND;
else if (strstr(argv[0],"get") != NULL)
action = FTP_GET;
else if (strstr(argv[0],"dir") != NULL)
action = FTP_DIR;
else if (strstr(argv[0],"list") != NULL)
action = FTP_LIST;
else if (strstr(argv[0],"rm") != NULL)
action = FTP_RM;
if ((action == 0) && (argc > 2))
{
if ( argc < 3 ) /* command + site */
{
usage();
exit( EX_SYNTAX );
}
if (strcmp(argv[1],"send") == 0)
action = FTP_SEND;
else if (strcmp(argv[1],"get") == 0)
action = FTP_GET;
else if (strcmp(argv[1],"dir") == 0)
action = FTP_DIR;
else if (strcmp(argv[1],"list") == 0)
action = FTP_LIST;
else if (strcmp(argv[1],"rm") == 0)
action = FTP_RM;
if (action)
optind++;
}
if (action == 0)
{
usage();
exit(EX_SYNTAX);
}
FtpInit();
// while (argv[optind] != NULL)
while ( optind < argc )
{
if (argv[optind][0] != '-')
{
if (host == NULL)
host = argv[optind++];
else
{
process_file(argv[optind++]);
files_processed++;
}
continue;
}
opt = getopt(argc,argv,"abil:m:p:r:s:v:w");
switch (opt)
{
case '?' :
fprintf(stderr,"Invalid option: %c\n", opt);
usage();
exit(EX_SYNTAX);
case ':' :
usage();
exit(EX_SYNTAX);
case 'a' : mode = 'A'; break;
case 'b' : strippath = !strippath; break;
case 'i' : mode = 'I'; break;
case 'l' : user = optarg; break;
case 'm' : set_umask(optarg); break;
case 'p' : pass = optarg; break;
case 'r' : change_directory(optarg); break;
case 's' : site_cmd(optarg); break;
case 'v' :
if (opt == ':')
ftplib_debug++;
else
ftplib_debug = atoi(optarg);
break;
case 'w' : wildcard = !wildcard; break;
default :
usage();
exit(EX_SYNTAX);
}
}
if (files_processed == 0)
{
ftp_connect();
if ((action == FTP_DIR) || (action == FTP_LIST))
process_file(NULL);
else
{
char fnm[256];
do
{
char *nl;
if (isatty(fileno(stdin)))
printf("file> ");
if (fgets(fnm, sizeof(fnm), stdin) == NULL)
break;
if ((nl = strchr(fnm,'\n')) != NULL)
*nl = '\0';
process_file(fnm);
}
while (1);
}
}
if (conn)
FtpClose(conn);
return 0;
}
2、ftplib.h
/***************************************************************************/
/* */
/* ftplib.h - header file for callable ftp access routines */
/* Copyright (C) 1996-2001, 2013, 2016 Thomas Pfau, tfpfau@gmail.com */
/* 1407 Thomas Ave, North Brunswick, NJ, 08902 */
/* */
/* This library is free software. You can redistribute it and/or */
/* modify it under the terms of the Artistic License 2.0. */
/* */
/* This library 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 */
/* Artistic License 2.0 for more details. */
/* */
/* See the file LICENSE or */
/* http://www.perlfoundation.org/artistic_license_2_0 */
/* */
/***************************************************************************/
#if !defined(__FTPLIB_H)
#define __FTPLIB_H
#if defined(__unix__) || defined(VMS)
#define GLOBALDEF
#define GLOBALREF extern
#elif defined(_WIN32)
#if defined BUILDING_LIBRARY
#define GLOBALDEF __declspec(dllexport)
#define GLOBALREF __declspec(dllexport)
#else
#define GLOBALREF __declspec(dllimport)
#endif
#endif
#include <limits.h>
#include <inttypes.h>
/* FtpAccess() type codes */
#define FTPLIB_DIR 1
#define FTPLIB_DIR_VERBOSE 2
#define FTPLIB_FILE_READ 3
#define FTPLIB_FILE_WRITE 4
/* FtpAccess() mode codes */
#define FTPLIB_ASCII 'A'
#define FTPLIB_IMAGE 'I'
#define FTPLIB_TEXT FTPLIB_ASCII
#define FTPLIB_BINARY FTPLIB_IMAGE
/* connection modes */
#define FTPLIB_PASSIVE 1
#define FTPLIB_PORT 2
/* connection option names */
#define FTPLIB_CONNMODE 1
#define FTPLIB_CALLBACK 2
#define FTPLIB_IDLETIME 3
#define FTPLIB_CALLBACKARG 4
#define FTPLIB_CALLBACKBYTES 5
#ifdef __cplusplus
extern "C" {
#endif
#if defined(__UINT64_MAX)
typedef uint64_t fsz_t;
#else
typedef uint32_t fsz_t;
#endif
typedef struct NetBuf netbuf;
typedef int (*FtpCallback)(netbuf *nControl, fsz_t xfered, void *arg);
typedef struct FtpCallbackOptions {
FtpCallback cbFunc; /* function to call */
void *cbArg; /* argument to pass to function */
unsigned int bytesXferred; /* callback if this number of bytes transferred */
unsigned int idleTime; /* callback if this many milliseconds have elapsed */
} FtpCallbackOptions;
GLOBALREF int ftplib_debug;
GLOBALREF void FtpInit(void);
GLOBALREF char *FtpLastResponse(netbuf *nControl);
GLOBALREF int FtpConnect(const char *host, netbuf **nControl);
GLOBALREF int FtpOptions(int opt, long val, netbuf *nControl);
GLOBALREF int FtpSetCallback(const FtpCallbackOptions *opt, netbuf *nControl);
GLOBALREF int FtpClearCallback(netbuf *nControl);
GLOBALREF int FtpLogin(const char *user, const char *pass, netbuf *nControl);
GLOBALREF int FtpAccess(const char *path, int typ, int mode, netbuf *nControl,
netbuf **nData);
GLOBALREF int FtpRead(void *buf, int max, netbuf *nData);
GLOBALREF int FtpWrite(const void *buf, int len, netbuf *nData);
GLOBALREF int FtpClose(netbuf *nData);
GLOBALREF int FtpSite(const char *cmd, netbuf *nControl);
GLOBALREF int FtpSysType(char *buf, int max, netbuf *nControl);
GLOBALREF int FtpMkdir(const char *path, netbuf *nControl);
GLOBALREF int FtpChdir(const char *path, netbuf *nControl);
GLOBALREF int FtpCDUp(netbuf *nControl);
GLOBALREF int FtpRmdir(const char *path, netbuf *nControl);
GLOBALREF int FtpPwd(char *path, int max, netbuf *nControl);
GLOBALREF int FtpNlst(const char *output, const char *path, netbuf *nControl);
GLOBALREF int FtpDir(const char *output, const char *path, netbuf *nControl);
GLOBALREF int FtpSize(const char *path, unsigned int *size, char mode, netbuf *nControl);
#if defined(__UINT64_MAX)
GLOBALREF int FtpSizeLong(const char *path, fsz_t *size, char mode, netbuf *nControl);
#endif
GLOBALREF int FtpModDate(const char *path, char *dt, int max, netbuf *nControl);
GLOBALREF int FtpGet(const char *output, const char *path, char mode,
netbuf *nControl);
GLOBALREF int FtpPut(const char *input, const char *path, char mode,
netbuf *nControl);
GLOBALREF int FtpRename(const char *src, const char *dst, netbuf *nControl);
GLOBALREF int FtpDelete(const char *fnm, netbuf *nControl);
GLOBALREF void FtpQuit(netbuf *nControl);
#ifdef __cplusplus
};
#endif
#endif /* __FTPLIB_H */
3、ftplib.c
/***************************************************************************/
/* */
/* ftplib.c - callable ftp access routines */
/* Copyright (C) 1996-2001, 2013, 2016 Thomas Pfau, tfpfau@gmail.com */
/* 1407 Thomas Ave, North Brunswick, NJ, 08902 */
/* */
/* This library is free software. You can redistribute it and/or */
/* modify it under the terms of the Artistic License 2.0. */
/* */
/* This library 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 */
/* Artistic License 2.0 for more details. */
/* */
/* See the file LICENSE or */
/* http://www.perlfoundation.org/artistic_license_2_0 */
/* */
/***************************************************************************/
#if defined(__unix__) || defined(__VMS)
#include <unistd.h>
#endif
#if defined(_WIN32)
#include <windows.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#if defined(__unix__)
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#elif defined(VMS)
#include <types.h>
#include <socket.h>
#include <in.h>
#include <netdb.h>
#include <inet.h>
#elif defined(_WIN32)
#include <winsock.h>
#endif
#if defined(__APPLE__)
#undef _REENTRANT
#endif
#define BUILDING_LIBRARY
#include "ftplib.h"
#if defined(__UINT64_MAX) && !defined(PRIu64)
#if ULONG_MAX == __UINT32_MAX
#define PRIu64 "llu"
#else
#define PRIu64 "lu"
#endif
#endif
#if defined(_WIN32)
#define SETSOCKOPT_OPTVAL_TYPE (const char *)
#else
#define SETSOCKOPT_OPTVAL_TYPE (void *)
#endif
#define FTPLIB_BUFSIZ 8192
#define RESPONSE_BUFSIZ 1024
#define TMP_BUFSIZ 1024
#define ACCEPT_TIMEOUT 30
#define FTPLIB_CONTROL 0
#define FTPLIB_READ 1
#define FTPLIB_WRITE 2
#if !defined FTPLIB_DEFMODE
#define FTPLIB_DEFMODE FTPLIB_PASSIVE
#endif
struct NetBuf {
char *cput,*cget;
int handle;
int cavail,cleft;
char *buf;
int dir;
netbuf *ctrl;
netbuf *data;
int cmode;
struct timeval idletime;
FtpCallback idlecb;
void *idlearg;
unsigned long int xfered;
unsigned long int cbbytes;
unsigned long int xfered1;
char response[RESPONSE_BUFSIZ];
};
static char *version =
"ftplib Release 4.0 07-Jun-2013, copyright 1996-2003, 2013 Thomas Pfau";
GLOBALDEF int ftplib_debug = 0;
#if defined(__unix__) || defined(VMS)
int net_read(int fd, char *buf, size_t len)
{
while ( 1 )
{
int c = read(fd, buf, len);
if ( c == -1 )
{
if ( errno != EINTR && errno != EAGAIN )
return -1;
}
else
{
return c;
}
}
}
int net_write(int fd, const char *buf, size_t len)
{
int done = 0;
while ( len > 0 )
{
int c = write( fd, buf, len );
if ( c == -1 )
{
if ( errno != EINTR && errno != EAGAIN )
return -1;
}
else if ( c == 0 )
{
return done;
}
else
{
buf += c;
done += c;
len -= c;
}
}
return done;
}
#define net_close close
#elif defined(_WIN32)
#define net_read(x,y,z) recv(x,y,z,0)
#define net_write(x,y,z) send(x,y,z,0)
#define net_close closesocket
#endif
#if defined(NEED_MEMCCPY)
/*
* VAX C does not supply a memccpy routine so I provide my own
*/
void *memccpy(void *dest, const void *src, int c, size_t n)
{
int i=0;
const unsigned char *ip=src;
unsigned char *op=dest;
while (i < n)
{
if ((*op++ = *ip++) == c)
break;
i++;
}
if (i == n)
return NULL;
return op;
}
#endif
#if defined(NEED_STRDUP)
/*
* strdup - return a malloc'ed copy of a string
*/
char *strdup(const char *src)
{
int l = strlen(src) + 1;
char *dst = malloc(l);
if (dst)
strcpy(dst,src);
return dst;
}
#endif
/*
* socket_wait - wait for socket to receive or flush data
*
* return 1 if no user callback, otherwise, return value returned by
* user callback
*/
static int socket_wait(netbuf *ctl)
{
fd_set fd,*rfd = NULL,*wfd = NULL;
struct timeval tv;
int rv = 0;
if ((ctl->dir == FTPLIB_CONTROL) || (ctl->idlecb == NULL))
return 1;
if (ctl->dir == FTPLIB_WRITE)
wfd = &fd;
else
rfd = &fd;
FD_ZERO(&fd);
do
{
FD_SET(ctl->handle,&fd);
tv = ctl->idletime;
rv = select(ctl->handle+1, rfd, wfd, NULL, &tv);
if (rv == -1)
{
rv = 0;
strncpy(ctl->ctrl->response, strerror(errno),
sizeof(ctl->ctrl->response));
break;
}
else if (rv > 0)
{
rv = 1;
break;
}
}
while ((rv = ctl->idlecb(ctl, ctl->xfered, ctl->idlearg)));
return rv;
}
/*
* read a line of text
*
* return -1 on error or bytecount
*/
static int readline(char *buf,int max,netbuf *ctl)
{
int x,retval = 0;
char *end,*bp=buf;
int eof = 0;
if ((ctl->dir != FTPLIB_CONTROL) && (ctl->dir != FTPLIB_READ))
return -1;
if (max == 0)
return 0;
do
{
if (ctl->cavail > 0)
{
x = (max >= ctl->cavail) ? ctl->cavail : max-1;
end = memccpy(bp,ctl->cget,'\n',x);
if (end != NULL)
x = end - bp;
retval += x;
bp += x;
*bp = '\0';
max -= x;
ctl->cget += x;
ctl->cavail -= x;
if (end != NULL)
{
bp -= 2;
if (strcmp(bp,"\r\n") == 0)
{
*bp++ = '\n';
*bp++ = '\0';
--retval;
}
break;
}
}
if (max == 1)
{
*buf = '\0';
break;
}
if (ctl->cput == ctl->cget)
{
ctl->cput = ctl->cget = ctl->buf;
ctl->cavail = 0;
ctl->cleft = FTPLIB_BUFSIZ;
}
if (eof)
{
if (retval == 0)
retval = -1;
break;
}
if (!socket_wait(ctl))
return retval;
if ((x = net_read(ctl->handle,ctl->cput,ctl->cleft)) == -1)
{
if (ftplib_debug)
perror("read");
retval = -1;
break;
}
if (x == 0)
eof = 1;
ctl->cleft -= x;
ctl->cavail += x;
ctl->cput += x;
}
while (1);
return retval;
}
/*
* write lines of text
*
* return -1 on error or bytecount
*/
static int writeline(const char *buf, int len, netbuf *nData)
{
int x, nb=0, w;
const char *ubp = buf;
char *nbp;
char lc=0;
if (nData->dir != FTPLIB_WRITE)
return -1;
nbp = nData->buf;
for (x=0; x < len; x++)
{
if ((*ubp == '\n') && (lc != '\r'))
{
if (nb == FTPLIB_BUFSIZ)
{
if (!socket_wait(nData))
return x;
w = net_write(nData->handle, nbp, FTPLIB_BUFSIZ);
if (w != FTPLIB_BUFSIZ)
{
if (ftplib_debug)
printf("net_write(1) returned %d, errno = %d\n", w, errno);
return(-1);
}
nb = 0;
}
nbp[nb++] = '\r';
}
if (nb == FTPLIB_BUFSIZ)
{
if (!socket_wait(nData))
return x;
w = net_write(nData->handle, nbp, FTPLIB_BUFSIZ);
if (w != FTPLIB_BUFSIZ)
{
if (ftplib_debug)
printf("net_write(2) returned %d, errno = %d\n", w, errno);
return(-1);
}
nb = 0;
}
nbp[nb++] = lc = *ubp++;
}
if (nb)
{
if (!socket_wait(nData))
return x;
w = net_write(nData->handle, nbp, nb);
if (w != nb)
{
if (ftplib_debug)
printf("net_write(3) returned %d, errno = %d\n", w, errno);
return(-1);
}
}
return len;
}
/*
* read a response from the server
*
* return 0 if first char doesn't match
* return 1 if first char matches
*/
static int readresp(char c, netbuf *nControl)
{
char match[5];
if (readline(nControl->response,RESPONSE_BUFSIZ,nControl) == -1)
{
if (ftplib_debug)
perror("Control socket read failed");
return 0;
}
if (ftplib_debug > 1)
fprintf(stderr,"%s",nControl->response);
if (nControl->response[3] == '-')
{
strncpy(match,nControl->response,3);
match[3] = ' ';
match[4] = '\0';
do
{
if (readline(nControl->response,RESPONSE_BUFSIZ,nControl) == -1)
{
if (ftplib_debug)
perror("Control socket read failed");
return 0;
}
if (ftplib_debug > 1)
fprintf(stderr,"%s",nControl->response);
}
while (strncmp(nControl->response,match,4));
}
if (nControl->response[0] == c)
return 1;
return 0;
}
/*
* FtpInit for stupid operating systems that require it (Windows NT)
*/
GLOBALDEF void FtpInit(void)
{
#if defined(_WIN32)
WORD wVersionRequested;
WSADATA wsadata;
int err;
wVersionRequested = MAKEWORD(1,1);
if ((err = WSAStartup(wVersionRequested,&wsadata)) != 0)
fprintf(stderr,"Network failed to start: %d\n",err);
#endif
}
/*
* FtpLastResponse - return a pointer to the last response received
*/
GLOBALDEF char *FtpLastResponse(netbuf *nControl)
{
if ((nControl) && (nControl->dir == FTPLIB_CONTROL))
return nControl->response;
return NULL;
}
/*
* FtpConnect - connect to remote server
*
* return 1 if connected, 0 if not
*/
GLOBALDEF int FtpConnect(const char *host, netbuf **nControl)
{
int sControl;
struct sockaddr_in sin;
int on=1;
netbuf *ctrl;
char *lhost;
char *pnum;
memset(&sin,0,sizeof(sin));
sin.sin_family = AF_INET;
lhost = strdup(host);
pnum = strchr(lhost,':');
if (pnum == NULL)
pnum = "ftp";
else
*pnum++ = '\0';
if (isdigit(*pnum))
sin.sin_port = htons(atoi(pnum));
else
{
struct servent *pse;
#if _REENTRANT
struct servent se;
char tmpbuf[TMP_BUFSIZ];
int i;
if ( ( i = getservbyname_r(pnum,"tcp",&se,tmpbuf,TMP_BUFSIZ,&pse) ) != 0 )
{
errno = i;
if ( ftplib_debug )
perror("getservbyname_r");
free(lhost);
return 0;
}
#else
if ((pse = getservbyname(pnum,"tcp") ) == NULL )
{
if ( ftplib_debug )
perror("getservbyname");
free(lhost);
return 0;
}
#endif
sin.sin_port = pse->s_port;
}
if ((sin.sin_addr.s_addr = inet_addr(lhost)) == INADDR_NONE)
{
struct hostent *phe;
#ifdef _REENTRANT
struct hostent he;
char tmpbuf[TMP_BUFSIZ];
int i, herr;
if ( ( ( i = gethostbyname_r( lhost, &he, tmpbuf, TMP_BUFSIZ, &phe, &herr ) ) != 0 ) ||
( phe == NULL ) )
{
if ( ftplib_debug )
fprintf(stderr, "gethostbyname: %s\n", hstrerror(herr));
free(lhost);
return 0;
}
#else
if ((phe = gethostbyname(lhost)) == NULL)
{
if (ftplib_debug)
fprintf(stderr, "gethostbyname: %s\n", hstrerror(h_errno));
free(lhost);
return 0;
}
#endif
memcpy((char *)&sin.sin_addr, phe->h_addr, phe->h_length);
}
free(lhost);
sControl = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sControl == -1)
{
if (ftplib_debug)
perror("socket");
return 0;
}
if (setsockopt(sControl,SOL_SOCKET,SO_REUSEADDR,
SETSOCKOPT_OPTVAL_TYPE &on, sizeof(on)) == -1)
{
if (ftplib_debug)
perror("setsockopt");
net_close(sControl);
return 0;
}
if (connect(sControl, (struct sockaddr *)&sin, sizeof(sin)) == -1)
{
if (ftplib_debug)
perror("connect");
net_close(sControl);
return 0;
}
ctrl = calloc(1,sizeof(netbuf));
if (ctrl == NULL)
{
if (ftplib_debug)
perror("calloc");
net_close(sControl);
return 0;
}
ctrl->buf = malloc(FTPLIB_BUFSIZ);
if (ctrl->buf == NULL)
{
if (ftplib_debug)
perror("calloc");
net_close(sControl);
free(ctrl);
return 0;
}
ctrl->handle = sControl;
ctrl->dir = FTPLIB_CONTROL;
ctrl->ctrl = NULL;
ctrl->data = NULL;
ctrl->cmode = FTPLIB_DEFMODE;
ctrl->idlecb = NULL;
ctrl->idletime.tv_sec = ctrl->idletime.tv_usec = 0;
ctrl->idlearg = NULL;
ctrl->xfered = 0;
ctrl->xfered1 = 0;
ctrl->cbbytes = 0;
if (readresp('2', ctrl) == 0)
{
net_close(sControl);
free(ctrl->buf);
free(ctrl);
return 0;
}
*nControl = ctrl;
return 1;
}
GLOBALDEF int FtpSetCallback(const FtpCallbackOptions *opt, netbuf *nControl)
{
nControl->idlecb = opt->cbFunc;
nControl->idlearg = opt->cbArg;
nControl->idletime.tv_sec = opt->idleTime / 1000;
nControl->idletime.tv_usec = (opt->idleTime % 1000) * 1000;
nControl->cbbytes = opt->bytesXferred;
return 1;
}
GLOBALDEF int FtpClearCallback(netbuf *nControl)
{
nControl->idlecb = NULL;
nControl->idlearg = NULL;
nControl->idletime.tv_sec = 0;
nControl->idletime.tv_usec = 0;
nControl->cbbytes = 0;
return 1;
}
/*
* FtpOptions - change connection options
*
* returns 1 if successful, 0 on error
*/
GLOBALDEF int FtpOptions(int opt, long val, netbuf *nControl)
{
int v,rv=0;
switch (opt)
{
case FTPLIB_CONNMODE:
v = (int) val;
if ((v == FTPLIB_PASSIVE) || (v == FTPLIB_PORT))
{
nControl->cmode = v;
rv = 1;
}
break;
case FTPLIB_CALLBACK:
nControl->idlecb = (FtpCallback) val;
rv = 1;
break;
case FTPLIB_IDLETIME:
v = (int) val;
rv = 1;
nControl->idletime.tv_sec = v / 1000;
nControl->idletime.tv_usec = (v % 1000) * 1000;
break;
case FTPLIB_CALLBACKARG:
rv = 1;
nControl->idlearg = (void *) val;
break;
case FTPLIB_CALLBACKBYTES:
rv = 1;
nControl->cbbytes = (int) val;
break;
}
return rv;
}
/*
* FtpSendCmd - send a command and wait for expected response
*
* return 1 if proper response received, 0 otherwise
*/
static int FtpSendCmd(const char *cmd, char expresp, netbuf *nControl)
{
char buf[TMP_BUFSIZ];
if (nControl->dir != FTPLIB_CONTROL)
return 0;
if (ftplib_debug > 2)
fprintf(stderr,"%s\n",cmd);
if ((strlen(cmd) + 3) > sizeof(buf))
return 0;
sprintf(buf,"%s\r\n",cmd);
if (net_write(nControl->handle,buf,strlen(buf)) <= 0)
{
if (ftplib_debug)
perror("write");
return 0;
}
return readresp(expresp, nControl);
}
/*
* FtpLogin - log in to remote server
*
* return 1 if logged in, 0 otherwise
*/
GLOBALDEF int FtpLogin(const char *user, const char *pass, netbuf *nControl)
{
char tempbuf[64];
if (((strlen(user) + 7) > sizeof(tempbuf)) ||
((strlen(pass) + 7) > sizeof(tempbuf)))
return 0;
sprintf(tempbuf,"USER %s",user);
if (!FtpSendCmd(tempbuf,'3',nControl))
{
if (nControl->response[0] == '2')
return 1;
return 0;
}
sprintf(tempbuf,"PASS %s",pass);
return FtpSendCmd(tempbuf,'2',nControl);
}
/*
* FtpOpenPort - set up data connection
*
* return 1 if successful, 0 otherwise
*/
static int FtpOpenPort(netbuf *nControl, netbuf **nData, int mode, int dir)
{
int sData;
union {
struct sockaddr sa;
struct sockaddr_in in;
} sin;
struct linger lng = { 0, 0 };
unsigned int l;
int on=1;
netbuf *ctrl;
char *cp;
unsigned int v[6];
char buf[TMP_BUFSIZ];
if (nControl->dir != FTPLIB_CONTROL)
return -1;
if ((dir != FTPLIB_READ) && (dir != FTPLIB_WRITE))
{
sprintf(nControl->response, "Invalid direction %d\n", dir);
return -1;
}
if ((mode != FTPLIB_ASCII) && (mode != FTPLIB_IMAGE))
{
sprintf(nControl->response, "Invalid mode %c\n", mode);
return -1;
}
l = sizeof(sin);
if (nControl->cmode == FTPLIB_PASSIVE)
{
memset(&sin, 0, l);
sin.in.sin_family = AF_INET;
if (!FtpSendCmd("PASV",'2',nControl))
return -1;
cp = strchr(nControl->response,'(');
if (cp == NULL)
return -1;
cp++;
sscanf(cp,"%u,%u,%u,%u,%u,%u",&v[2],&v[3],&v[4],&v[5],&v[0],&v[1]);
sin.sa.sa_data[2] = v[2];
sin.sa.sa_data[3] = v[3];
sin.sa.sa_data[4] = v[4];
sin.sa.sa_data[5] = v[5];
sin.sa.sa_data[0] = v[0];
sin.sa.sa_data[1] = v[1];
}
else
{
if (getsockname(nControl->handle, &sin.sa, &l) < 0)
{
if (ftplib_debug)
perror("getsockname");
return -1;
}
}
sData = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);
if (sData == -1)
{
if (ftplib_debug)
perror("socket");
return -1;
}
if (setsockopt(sData,SOL_SOCKET,SO_REUSEADDR,
SETSOCKOPT_OPTVAL_TYPE &on,sizeof(on)) == -1)
{
if (ftplib_debug)
perror("setsockopt");
net_close(sData);
return -1;
}
if (setsockopt(sData,SOL_SOCKET,SO_LINGER,
SETSOCKOPT_OPTVAL_TYPE &lng,sizeof(lng)) == -1)
{
if (ftplib_debug)
perror("setsockopt");
net_close(sData);
return -1;
}
if (nControl->cmode == FTPLIB_PASSIVE)
{
if (connect(sData, &sin.sa, sizeof(sin.sa)) == -1)
{
if (ftplib_debug)
perror("connect");
net_close(sData);
return -1;
}
}
else
{
sin.in.sin_port = 0;
if (bind(sData, &sin.sa, sizeof(sin)) == -1)
{
if (ftplib_debug)
perror("bind");
net_close(sData);
return -1;
}
if (listen(sData, 1) < 0)
{
if (ftplib_debug)
perror("listen");
net_close(sData);
return -1;
}
if (getsockname(sData, &sin.sa, &l) < 0)
return -1;
sprintf(buf, "PORT %d,%d,%d,%d,%d,%d",
(unsigned char) sin.sa.sa_data[2],
(unsigned char) sin.sa.sa_data[3],
(unsigned char) sin.sa.sa_data[4],
(unsigned char) sin.sa.sa_data[5],
(unsigned char) sin.sa.sa_data[0],
(unsigned char) sin.sa.sa_data[1]);
if (!FtpSendCmd(buf,'2',nControl))
{
net_close(sData);
return -1;
}
}
ctrl = calloc(1,sizeof(netbuf));
if (ctrl == NULL)
{
if (ftplib_debug)
perror("calloc");
net_close(sData);
return -1;
}
if ((mode == 'A') && ((ctrl->buf = malloc(FTPLIB_BUFSIZ)) == NULL))
{
if (ftplib_debug)
perror("calloc");
net_close(sData);
free(ctrl);
return -1;
}
ctrl->handle = sData;
ctrl->dir = dir;
ctrl->idletime = nControl->idletime;
ctrl->idlearg = nControl->idlearg;
ctrl->xfered = 0;
ctrl->xfered1 = 0;
ctrl->cbbytes = nControl->cbbytes;
ctrl->ctrl = nControl;
if (ctrl->idletime.tv_sec || ctrl->idletime.tv_usec || ctrl->cbbytes)
ctrl->idlecb = nControl->idlecb;
else
ctrl->idlecb = NULL;
nControl->data = ctrl;
*nData = ctrl;
return 1;
}
/*
* FtpAcceptConnection - accept connection from server
*
* return 1 if successful, 0 otherwise
*/
static int FtpAcceptConnection(netbuf *nData, netbuf *nControl)
{
int sData;
struct sockaddr addr;
unsigned int l;
int i;
struct timeval tv;
fd_set mask;
int rv;
FD_ZERO(&mask);
FD_SET(nControl->handle, &mask);
FD_SET(nData->handle, &mask);
tv.tv_usec = 0;
tv.tv_sec = ACCEPT_TIMEOUT;
i = nControl->handle;
if (i < nData->handle)
i = nData->handle;
i = select(i+1, &mask, NULL, NULL, &tv);
if (i == -1)
{
strncpy(nControl->response, strerror(errno),
sizeof(nControl->response));
net_close(nData->handle);
nData->handle = 0;
rv = 0;
}
else if (i == 0)
{
strcpy(nControl->response, "timed out waiting for connection");
net_close(nData->handle);
nData->handle = 0;
rv = 0;
}
else
{
if (FD_ISSET(nData->handle, &mask))
{
l = sizeof(addr);
sData = accept(nData->handle, &addr, &l);
i = errno;
net_close(nData->handle);
if (sData > 0)
{
rv = 1;
nData->handle = sData;
}
else
{
strncpy(nControl->response, strerror(i),
sizeof(nControl->response));
nData->handle = 0;
rv = 0;
}
}
else if (FD_ISSET(nControl->handle, &mask))
{
net_close(nData->handle);
nData->handle = 0;
readresp('2', nControl);
rv = 0;
}
}
return rv;
}
/*
* FtpAccess - return a handle for a data stream
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpAccess(const char *path, int typ, int mode, netbuf *nControl,
netbuf **nData)
{
char buf[TMP_BUFSIZ];
int dir;
if ((path == NULL) &&
((typ == FTPLIB_FILE_WRITE) || (typ == FTPLIB_FILE_READ)))
{
sprintf(nControl->response,
"Missing path argument for file transfer\n");
return 0;
}
sprintf(buf, "TYPE %c", mode);
if (!FtpSendCmd(buf, '2', nControl))
return 0;
switch (typ)
{
case FTPLIB_DIR:
strcpy(buf,"NLST");
dir = FTPLIB_READ;
break;
case FTPLIB_DIR_VERBOSE:
strcpy(buf,"LIST");
dir = FTPLIB_READ;
break;
case FTPLIB_FILE_READ:
strcpy(buf,"RETR");
dir = FTPLIB_READ;
break;
case FTPLIB_FILE_WRITE:
strcpy(buf,"STOR");
dir = FTPLIB_WRITE;
break;
default:
sprintf(nControl->response, "Invalid open type %d\n", typ);
return 0;
}
if (path != NULL)
{
int i = strlen(buf);
buf[i++] = ' ';
if ((strlen(path) + i + 1) >= sizeof(buf))
return 0;
strcpy(&buf[i],path);
}
if (FtpOpenPort(nControl, nData, mode, dir) == -1)
return 0;
if (!FtpSendCmd(buf, '1', nControl))
{
FtpClose(*nData);
*nData = NULL;
return 0;
}
if (nControl->cmode == FTPLIB_PORT)
{
if (!FtpAcceptConnection(*nData,nControl))
{
FtpClose(*nData);
*nData = NULL;
nControl->data = NULL;
return 0;
}
}
return 1;
}
/*
* FtpRead - read from a data connection
*/
GLOBALDEF int FtpRead(void *buf, int max, netbuf *nData)
{
int i;
if (nData->dir != FTPLIB_READ)
return 0;
if (nData->buf)
i = readline(buf, max, nData);
else
{
i = socket_wait(nData);
if (i != 1)
return 0;
i = net_read(nData->handle, buf, max);
}
if (i == -1)
return 0;
nData->xfered += i;
if (nData->idlecb && nData->cbbytes)
{
nData->xfered1 += i;
if (nData->xfered1 > nData->cbbytes)
{
if (nData->idlecb(nData, nData->xfered, nData->idlearg) == 0)
return 0;
nData->xfered1 = 0;
}
}
return i;
}
/*
* FtpWrite - write to a data connection
*/
GLOBALDEF int FtpWrite(const void *buf, int len, netbuf *nData)
{
int i;
if (nData->dir != FTPLIB_WRITE)
return 0;
if (nData->buf)
i = writeline(buf, len, nData);
else
{
socket_wait(nData);
i = net_write(nData->handle, buf, len);
}
if (i == -1)
return 0;
nData->xfered += i;
if (nData->idlecb && nData->cbbytes)
{
nData->xfered1 += i;
if (nData->xfered1 > nData->cbbytes)
{
nData->idlecb(nData, nData->xfered, nData->idlearg);
nData->xfered1 = 0;
}
}
return i;
}
/*
* FtpClose - close a data connection
*/
GLOBALDEF int FtpClose(netbuf *nData)
{
netbuf *ctrl;
switch (nData->dir)
{
case FTPLIB_WRITE:
/* potential problem - if buffer flush fails, how to notify user? */
if (nData->buf != NULL)
writeline(NULL, 0, nData);
case FTPLIB_READ:
if (nData->buf)
free(nData->buf);
shutdown(nData->handle,2);
net_close(nData->handle);
ctrl = nData->ctrl;
free(nData);
ctrl->data = NULL;
if (ctrl && ctrl->response[0] != '4' && ctrl->response[0] != '5')
{
return(readresp('2', ctrl));
}
return 1;
case FTPLIB_CONTROL:
if (nData->data)
{
nData->ctrl = NULL;
FtpClose(nData->data);
}
net_close(nData->handle);
free(nData);
return 0;
}
return 1;
}
/*
* FtpSite - send a SITE command
*
* return 1 if command successful, 0 otherwise
*/
GLOBALDEF int FtpSite(const char *cmd, netbuf *nControl)
{
char buf[TMP_BUFSIZ];
if ((strlen(cmd) + 7) > sizeof(buf))
return 0;
sprintf(buf,"SITE %s",cmd);
if (!FtpSendCmd(buf,'2',nControl))
return 0;
return 1;
}
/*
* FtpSysType - send a SYST command
*
* Fills in the user buffer with the remote system type. If more
* information from the response is required, the user can parse
* it out of the response buffer returned by FtpLastResponse().
*
* return 1 if command successful, 0 otherwise
*/
GLOBALDEF int FtpSysType(char *buf, int max, netbuf *nControl)
{
int l = max;
char *b = buf;
char *s;
if (!FtpSendCmd("SYST",'2',nControl))
return 0;
s = &nControl->response[4];
while ((--l) && (*s != ' '))
*b++ = *s++;
*b++ = '\0';
return 1;
}
/*
* FtpMkdir - create a directory at server
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpMkdir(const char *path, netbuf *nControl)
{
char buf[TMP_BUFSIZ];
if ((strlen(path) + 6) > sizeof(buf))
return 0;
sprintf(buf,"MKD %s",path);
if (!FtpSendCmd(buf,'2', nControl))
return 0;
return 1;
}
/*
* FtpChdir - change path at remote
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpChdir(const char *path, netbuf *nControl)
{
char buf[TMP_BUFSIZ];
if ((strlen(path) + 6) > sizeof(buf))
return 0;
sprintf(buf,"CWD %s",path);
if (!FtpSendCmd(buf,'2',nControl))
return 0;
return 1;
}
/*
* FtpCDUp - move to parent directory at remote
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpCDUp(netbuf *nControl)
{
if (!FtpSendCmd("CDUP",'2',nControl))
return 0;
return 1;
}
/*
* FtpRmdir - remove directory at remote
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpRmdir(const char *path, netbuf *nControl)
{
char buf[TMP_BUFSIZ];
if ((strlen(path) + 6) > sizeof(buf))
return 0;
sprintf(buf,"RMD %s",path);
if (!FtpSendCmd(buf,'2',nControl))
return 0;
return 1;
}
/*
* FtpPwd - get working directory at remote
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpPwd(char *path, int max, netbuf *nControl)
{
int l = max;
char *b = path;
char *s;
if (!FtpSendCmd("PWD",'2',nControl))
return 0;
s = strchr(nControl->response, '"');
if (s == NULL)
return 0;
s++;
while ((--l) && (*s) && (*s != '"'))
*b++ = *s++;
*b++ = '\0';
return 1;
}
/*
* FtpXfer - issue a command and transfer data
*
* return 1 if successful, 0 otherwise
*/
static int FtpXfer(const char *localfile, const char *path,
netbuf *nControl, int typ, int mode)
{
int l,c;
char *dbuf;
FILE *local = NULL;
netbuf *nData;
int rv=1;
if (localfile != NULL)
{
char ac[4];
memset( ac, 0, sizeof(ac) );
if (typ == FTPLIB_FILE_WRITE)
ac[0] = 'r';
else
ac[0] = 'w';
if (mode == FTPLIB_IMAGE)
ac[1] = 'b';
local = fopen(localfile, ac);
if (local == NULL)
{
strncpy(nControl->response, strerror(errno),
sizeof(nControl->response));
return 0;
}
}
if (local == NULL)
local = (typ == FTPLIB_FILE_WRITE) ? stdin : stdout;
if (!FtpAccess(path, typ, mode, nControl, &nData))
{
if (localfile)
{
fclose(local);
if ( typ == FTPLIB_FILE_READ )
unlink(localfile);
}
return 0;
}
dbuf = malloc(FTPLIB_BUFSIZ);
if (typ == FTPLIB_FILE_WRITE)
{
while ((l = fread(dbuf, 1, FTPLIB_BUFSIZ, local)) > 0)
{
if ((c = FtpWrite(dbuf, l, nData)) < l)
{
printf("short write: passed %d, wrote %d\n", l, c);
rv = 0;
break;
}
}
}
else
{
while ((l = FtpRead(dbuf, FTPLIB_BUFSIZ, nData)) > 0)
{
if (fwrite(dbuf, 1, l, local) == 0)
{
if (ftplib_debug)
perror("localfile write");
rv = 0;
break;
}
}
}
free(dbuf);
fflush(local);
if (localfile != NULL)
fclose(local);
FtpClose(nData);
return rv;
}
/*
* FtpNlst - issue an NLST command and write response to output
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpNlst(const char *outputfile, const char *path,
netbuf *nControl)
{
return FtpXfer(outputfile, path, nControl, FTPLIB_DIR, FTPLIB_ASCII);
}
/*
* FtpDir - issue a LIST command and write response to output
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpDir(const char *outputfile, const char *path, netbuf *nControl)
{
return FtpXfer(outputfile, path, nControl, FTPLIB_DIR_VERBOSE, FTPLIB_ASCII);
}
/*
* FtpSize - determine the size of a remote file
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpSize(const char *path, unsigned int *size, char mode, netbuf *nControl)
{
char cmd[TMP_BUFSIZ];
int resp,rv=1;
unsigned int sz;
if ((strlen(path) + 7) > sizeof(cmd))
return 0;
sprintf(cmd, "TYPE %c", mode);
if (!FtpSendCmd(cmd, '2', nControl))
return 0;
sprintf(cmd,"SIZE %s",path);
if (!FtpSendCmd(cmd,'2',nControl))
rv = 0;
else
{
if (sscanf(nControl->response, "%d %u", &resp, &sz) == 2)
*size = sz;
else
rv = 0;
}
return rv;
}
#if defined(__UINT64_MAX)
/*
* FtpSizeLong - determine the size of a remote file
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpSizeLong(const char *path, fsz_t *size, char mode, netbuf *nControl)
{
char cmd[TMP_BUFSIZ];
int resp,rv=1;
fsz_t sz;
if ((strlen(path) + 7) > sizeof(cmd))
return 0;
sprintf(cmd, "TYPE %c", mode);
if (!FtpSendCmd(cmd, '2', nControl))
return 0;
sprintf(cmd,"SIZE %s",path);
if (!FtpSendCmd(cmd,'2',nControl))
rv = 0;
else
{
if (sscanf(nControl->response, "%d %" PRIu64 "", &resp, &sz) == 2)
*size = sz;
else
rv = 0;
}
return rv;
}
#endif
/*
* FtpModDate - determine the modification date of a remote file
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpModDate(const char *path, char *dt, int max, netbuf *nControl)
{
char buf[TMP_BUFSIZ];
int rv = 1;
if ((strlen(path) + 7) > sizeof(buf))
return 0;
sprintf(buf,"MDTM %s",path);
if (!FtpSendCmd(buf,'2',nControl))
rv = 0;
else
strncpy(dt, &nControl->response[4], max);
return rv;
}
/*
* FtpGet - issue a GET command and write received data to output
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpGet(const char *outputfile, const char *path,
char mode, netbuf *nControl)
{
return FtpXfer(outputfile, path, nControl, FTPLIB_FILE_READ, mode);
}
/*
* FtpPut - issue a PUT command and send data from input
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpPut(const char *inputfile, const char *path, char mode,
netbuf *nControl)
{
return FtpXfer(inputfile, path, nControl, FTPLIB_FILE_WRITE, mode);
}
/*
* FtpRename - rename a file at remote
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpRename(const char *src, const char *dst, netbuf *nControl)
{
char cmd[TMP_BUFSIZ];
if (((strlen(src) + 7) > sizeof(cmd)) ||
((strlen(dst) + 7) > sizeof(cmd)))
return 0;
sprintf(cmd,"RNFR %s",src);
if (!FtpSendCmd(cmd,'3',nControl))
return 0;
sprintf(cmd,"RNTO %s",dst);
if (!FtpSendCmd(cmd,'2',nControl))
return 0;
return 1;
}
/*
* FtpDelete - delete a file at remote
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF int FtpDelete(const char *fnm, netbuf *nControl)
{
char cmd[TMP_BUFSIZ];
if ((strlen(fnm) + 7) > sizeof(cmd))
return 0;
sprintf(cmd,"DELE %s",fnm);
if (!FtpSendCmd(cmd,'2', nControl))
return 0;
return 1;
}
/*
* FtpQuit - disconnect from remote
*
* return 1 if successful, 0 otherwise
*/
GLOBALDEF void FtpQuit(netbuf *nControl)
{
if (nControl->dir != FTPLIB_CONTROL)
return;
FtpSendCmd("QUIT",'2',nControl);
net_close(nControl->handle);
free(nControl->buf);
free(nControl);
}
4、编译
mips-linux-gnu-gcc qftp.c ftplib.c -o tftp
编译后生成tftp可执行文件，可用于测试。
如有侵权，请及时联系博主删除。
![[附源码]SSM计算机毕业设计闲置物品交易管理系统JAVA](https://img-blog.csdnimg.cn/47ef026d4b4d46e8b87ede6a764f958b.png)
