ftpgetput: move control_stream to "struct globals";
unify common data pumpung stage for upload and download; other small shrinkage. EPSV still not implemented... function old new delta pump_data_and_QUIT - 82 +82 xconnect_ftpdata 127 156 +29 ftpcmd 301 304 +3 ftp_die 59 55 -4 ftpgetput_main 352 344 -8 ftp_send 185 91 -94 ftp_receive 394 293 -101 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 2/4 up/down: 114/-207) Total: -93 bytes
This commit is contained in:
Denis Vlasenko
parent
0e7940ae90
commit
7cb808e1c5
@ -19,9 +19,10 @@ struct globals {
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const char *user;
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const char *password;
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struct len_and_sockaddr *lsa;
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FILE *control_stream;
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int verbose_flag;
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int do_continue;
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char buf[1]; /* actually [BUF_SIZE] */
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char buf[1]; /* actually [BUFSZ] */
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};
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#define G (*(struct globals*)&bb_common_bufsiz1)
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enum { BUFSZ = COMMON_BUFSIZE - offsetof(struct globals, buf) };
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@ -31,7 +32,8 @@ struct BUG_G_too_big {
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#define user (G.user )
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#define password (G.password )
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#define lsa (G.lsa )
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#define verbose_flag (G.verbose_flag)
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#define control_stream (G.control_stream)
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#define verbose_flag (G.verbose_flag )
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#define do_continue (G.do_continue )
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#define buf (G.buf )
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#define INIT_G() do { \
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@ -41,36 +43,34 @@ struct BUG_G_too_big {
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static void ftp_die(const char *msg) ATTRIBUTE_NORETURN;
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static void ftp_die(const char *msg)
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{
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const char *cp = buf; /* buf holds peer's response */
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char *cp = buf; /* buf holds peer's response */
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/* Guard against garbage from remote server */
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while (*cp >= ' ' && *cp < '\x7f')
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cp++;
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bb_error_msg_and_die("unexpected server response%s%s: %.*s",
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msg ? " to " : "", msg ? msg : "",
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(int)(cp - buf), buf);
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*cp = '\0';
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bb_error_msg_and_die("unexpected server response%s%s: %s",
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(msg ? " to " : ""), (msg ? msg : ""), buf);
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}
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static int ftpcmd(const char *s1, const char *s2, FILE *stream)
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static int ftpcmd(const char *s1, const char *s2)
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{
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unsigned n;
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if (verbose_flag) {
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bb_error_msg("cmd %s %s", s1, s2);
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}
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if (s1) {
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fprintf(stream, (s2 ? "%s %s\r\n" : "%s %s\r\n"+3), s1, s2);
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fprintf(control_stream, (s2 ? "%s %s\r\n" : "%s %s\r\n"+3),
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s1, s2);
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fflush(control_stream);
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}
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do {
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char *buf_ptr;
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if (fgets(buf, BUFSZ - 2, stream) == NULL) {
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bb_perror_msg_and_die("fgets");
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}
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buf_ptr = strstr(buf, "\r\n");
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if (buf_ptr) {
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*buf_ptr = '\0';
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strcpy(buf, "EOF");
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if (fgets(buf, BUFSZ - 2, control_stream) == NULL) {
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ftp_die(NULL);
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}
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} while (!isdigit(buf[0]) || buf[3] != ' ');
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@ -80,10 +80,8 @@ static int ftpcmd(const char *s1, const char *s2, FILE *stream)
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return n;
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}
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static FILE *ftp_login(void)
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static void ftp_login(void)
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{
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FILE *control_stream;
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/* Connect to the command socket */
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control_stream = fdopen(xconnect_stream(lsa), "r+");
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if (control_stream == NULL) {
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@ -91,16 +89,16 @@ static FILE *ftp_login(void)
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bb_perror_nomsg_and_die();
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}
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if (ftpcmd(NULL, NULL, control_stream) != 220) {
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if (ftpcmd(NULL, NULL) != 220) {
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ftp_die(NULL);
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}
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/* Login to the server */
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switch (ftpcmd("USER", user, control_stream)) {
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switch (ftpcmd("USER", user)) {
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case 230:
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break;
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case 331:
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if (ftpcmd("PASS", password, control_stream) != 230) {
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if (ftpcmd("PASS", password) != 230) {
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ftp_die("PASS");
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}
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break;
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@ -108,9 +106,7 @@ static FILE *ftp_login(void)
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ftp_die("USER");
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}
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ftpcmd("TYPE I", NULL, control_stream);
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return control_stream;
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ftpcmd("TYPE I", NULL);
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}
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static int xconnect_ftpdata(void)
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@ -118,6 +114,30 @@ static int xconnect_ftpdata(void)
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char *buf_ptr;
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unsigned port_num;
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/*
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TODO: PASV command will not work for IPv6. RFC2428 describes
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IPv6-capable "extended PASV" - EPSV.
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"EPSV [protocol]" asks server to bind to and listen on a data port
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in specified protocol. Protocol is 1 for IPv4, 2 for IPv6.
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If not specified, defaults to "same as used for control connection".
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If server understood you, it should answer "229 <some text>(|||port|)"
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where "|" are literal pipe chars and "port" is ASCII decimal port#.
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There is also an IPv6-capable replacement for PORT (EPRT),
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but we don't need that.
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NB: PASV may still work for some servers even over IPv6.
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For example, vsftp happily answers
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"227 Entering Passive Mode (0,0,0,0,n,n)" and proceeds as usual.
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TODO2: need to stop ignoring IP address in PASV response.
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*/
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if (ftpcmd("PASV", NULL) != 227) {
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ftp_die("PASV");
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}
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/* Response is "NNN garbageN1,N2,N3,N4,P1,P2[)garbage]
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* Server's IP is N1.N2.N3.N4 (we ignore it)
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* Server's port for data connection is P1*256+P2 */
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@ -136,44 +156,41 @@ static int xconnect_ftpdata(void)
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return xconnect_stream(lsa);
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}
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static int pump_data_and_QUIT(int from, int to)
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{
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/* copy the file */
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if (bb_copyfd_eof(from, to) == -1) {
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/* error msg is already printed by bb_copyfd_eof */
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return EXIT_FAILURE;
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}
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/* close data connection */
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close(from); /* don't know which one is that, so we close both */
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close(to);
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/* does server confirm that transfer is finished? */
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if (ftpcmd(NULL, NULL) != 226) {
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ftp_die(NULL);
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}
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ftpcmd("QUIT", NULL);
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return EXIT_SUCCESS;
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}
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#if !ENABLE_FTPGET
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int ftp_receive(FILE *control_stream,
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const char *local_path, char *server_path);
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int ftp_receive(const char *local_path, char *server_path);
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#else
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static
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int ftp_receive(FILE *control_stream,
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const char *local_path, char *server_path)
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int ftp_receive(const char *local_path, char *server_path)
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{
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#define filesize ((off_t)-1)
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int fd_data;
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int fd_local = -1;
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off_t beg_range = 0;
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/*
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TODO: PASV command will not work for IPv6. RFC2428 describes
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IPv6-capable "extended PASV" - EPSV.
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"EPSV [protocol]" asks server to bind to and listen on a data port
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in specified protocol. Protocol is 1 for IPv4, 2 for IPv6.
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If not specified, defaults to "same as used for control connection".
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If server understood you, it should answer "229 <some text>(|||port|)"
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where "|" are literal pipe chars and "port" is ASCII decimal port#.
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There is also an IPv6-capable replacement for PORT (EPRT),
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but we don't need that.
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TODO: fold in sending of PASV/EPSV and parsing of response into
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xconnect_ftpdata(). (Also, need to stop ignoring IP address in PASV
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response).
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*/
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/* connect to the data socket */
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if (ftpcmd("PASV", NULL, control_stream) != 227) {
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ftp_die("PASV");
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}
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fd_data = xconnect_ftpdata();
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if (ftpcmd("SIZE", server_path, control_stream) != 213) {
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if (ftpcmd("SIZE", server_path) != 213) {
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do_continue = 0;
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}
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@ -197,16 +214,16 @@ response).
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if (do_continue) {
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sprintf(buf, "REST %"OFF_FMT"d", beg_range);
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if (ftpcmd(buf, NULL, control_stream) != 350) {
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if (ftpcmd(buf, NULL) != 350) {
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do_continue = 0;
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}
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}
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if (ftpcmd("RETR", server_path, control_stream) > 150) {
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if (ftpcmd("RETR", server_path) > 150) {
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ftp_die("RETR");
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}
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/* make local _after_ we know that remote file exists */
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/* create local file _after_ we know that remote file exists */
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if (fd_local == -1) {
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fd_local = xopen(local_path,
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do_continue ? (O_APPEND | O_WRONLY)
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@ -214,41 +231,21 @@ response).
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);
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}
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// TODO: merge tail of ftp_receive and ftp_send starting from here
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/* copy the file */
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if (bb_copyfd_eof(fd_data, fd_local) == -1) {
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/* error msg is already printed by bb_copyfd_eof */
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return EXIT_FAILURE;
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}
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/* close it all down */
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close(fd_data);
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if (ftpcmd(NULL, NULL, control_stream) != 226) {
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ftp_die(NULL);
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}
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ftpcmd("QUIT", NULL, control_stream);
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return EXIT_SUCCESS;
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return pump_data_and_QUIT(fd_data, fd_local);
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}
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#endif
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#if !ENABLE_FTPPUT
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int ftp_send(FILE *control_stream,
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const char *server_path, char *local_path);
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int ftp_send(const char *server_path, char *local_path);
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#else
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static
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int ftp_send(FILE *control_stream,
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const char *server_path, char *local_path)
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int ftp_send(const char *server_path, char *local_path)
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{
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int fd_data;
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int fd_local;
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int response;
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/* connect to the data socket */
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if (ftpcmd("PASV", NULL, control_stream) != 227) {
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ftp_die("PASV");
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}
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fd_data = xconnect_ftpdata();
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/* get the local file */
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@ -256,7 +253,7 @@ int ftp_send(FILE *control_stream,
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if (NOT_LONE_DASH(local_path))
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fd_local = xopen(local_path, O_RDONLY);
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response = ftpcmd("STOR", server_path, control_stream);
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response = ftpcmd("STOR", server_path);
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switch (response) {
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case 125:
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case 150:
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@ -265,29 +262,10 @@ int ftp_send(FILE *control_stream,
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ftp_die("STOR");
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}
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/* transfer the file */
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if (bb_copyfd_eof(fd_local, fd_data) == -1) {
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/* error msg is already printed by bb_copyfd_eof */
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return EXIT_FAILURE;
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}
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/* close it all down */
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close(fd_data);
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if (ftpcmd(NULL, NULL, control_stream) != 226) {
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ftp_die("close");
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}
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ftpcmd("QUIT", NULL, control_stream);
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return EXIT_SUCCESS;
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return pump_data_and_QUIT(fd_local, fd_data);
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}
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#endif
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#define FTPGETPUT_OPT_CONTINUE 1
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#define FTPGETPUT_OPT_VERBOSE 2
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#define FTPGETPUT_OPT_USER 4
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#define FTPGETPUT_OPT_PASSWORD 8
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#define FTPGETPUT_OPT_PORT 16
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#if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
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static const char ftpgetput_longopts[] ALIGN1 =
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"continue\0" Required_argument "c"
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@ -304,14 +282,13 @@ int ftpgetput_main(int argc ATTRIBUTE_UNUSED, char **argv)
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unsigned opt;
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const char *port = "ftp";
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/* socket to ftp server */
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FILE *control_stream;
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#if ENABLE_FTPPUT && !ENABLE_FTPGET
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# define ftp_action ftp_send
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#elif ENABLE_FTPGET && !ENABLE_FTPPUT
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# define ftp_action ftp_receive
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#else
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int (*ftp_action)(FILE *, const char *, char *) = ftp_send;
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int (*ftp_action)(const char *, char *) = ftp_send;
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/* Check to see if the command is ftpget or ftput */
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if (applet_name[3] == 'g') {
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@ -344,8 +321,6 @@ int ftpgetput_main(int argc ATTRIBUTE_UNUSED, char **argv)
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xmalloc_sockaddr2dotted(&lsa->u.sa));
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}
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/* Connect/Setup/Configure the FTP session */
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control_stream = ftp_login();
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return ftp_action(control_stream, argv[1], argv[2]);
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ftp_login();
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return ftp_action(argv[1], argv[2]);
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}
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