diff --git a/networking/ftpd.c b/networking/ftpd.c index b794a24c3..ec9683adb 100644 --- a/networking/ftpd.c +++ b/networking/ftpd.c @@ -17,49 +17,52 @@ #include #include +#define FTP_DATACONN 150 +#define FTP_NOOPOK 200 +#define FTP_TYPEOK 200 +#define FTP_PORTOK 200 +#define FTP_STRUOK 200 +#define FTP_MODEOK 200 +#define FTP_ALLOOK 202 +#define FTP_STATOK 211 +#define FTP_STATFILE_OK 213 +#define FTP_HELP 214 +#define FTP_SYSTOK 215 +#define FTP_GREET 220 +#define FTP_GOODBYE 221 +#define FTP_TRANSFEROK 226 +#define FTP_PASVOK 227 +#define FTP_LOGINOK 230 +#define FTP_CWDOK 250 +#define FTP_RMDIROK 250 +#define FTP_DELEOK 250 +#define FTP_RENAMEOK 250 +#define FTP_PWDOK 257 +#define FTP_MKDIROK 257 +#define FTP_GIVEPWORD 331 +#define FTP_RESTOK 350 +#define FTP_RNFROK 350 +#define FTP_BADSENDCONN 425 +#define FTP_BADSENDNET 426 +#define FTP_BADSENDFILE 451 +#define FTP_BADCMD 500 +#define FTP_COMMANDNOTIMPL 502 +#define FTP_NEEDUSER 503 +#define FTP_NEEDRNFR 503 +#define FTP_BADSTRU 504 +#define FTP_BADMODE 504 +#define FTP_LOGINERR 530 +#define FTP_FILEFAIL 550 +#define FTP_NOPERM 550 +#define FTP_UPLOADFAIL 553 + +#define STR1(s) #s +#define STR(s) STR1(s) + enum { OPT_v = (1 << 0), OPT_w = (1 << 1), - FTP_DATACONN = 150, - FTP_NOOPOK = 200, - FTP_TYPEOK = 200, - FTP_PORTOK = 200, - FTP_STRUOK = 200, - FTP_MODEOK = 200, - FTP_ALLOOK = 202, - FTP_STATOK = 211, - FTP_STATFILE_OK = 213, - FTP_HELP = 214, - FTP_SYSTOK = 215, - FTP_GREET = 220, - FTP_GOODBYE = 221, - FTP_TRANSFEROK = 226, - FTP_PASVOK = 227, - FTP_LOGINOK = 230, - FTP_CWDOK = 250, - FTP_RMDIROK = 250, - FTP_DELEOK = 250, - FTP_RENAMEOK = 250, - FTP_PWDOK = 257, - FTP_MKDIROK = 257, - FTP_GIVEPWORD = 331, - FTP_RESTOK = 350, - FTP_RNFROK = 350, - FTP_BADSENDCONN = 425, - FTP_BADSENDNET = 426, - FTP_BADSENDFILE = 451, - FTP_BADCMD = 500, - FTP_COMMANDNOTIMPL = 502, - FTP_NEEDUSER = 503, - FTP_NEEDRNFR = 503, - FTP_BADSTRU = 504, - FTP_BADMODE = 504, - FTP_LOGINERR = 530, - FTP_FILEFAIL = 550, - FTP_NOPERM = 550, - FTP_UPLOADFAIL = 553, - #define mk_const4(a,b,c,d) (((a * 0x100 + b) * 0x100 + c) * 0x100 + d) #define mk_const3(a,b,c) ((a * 0x100 + b) * 0x100 + c) const_ALLO = mk_const4('A', 'L', 'L', 'O'), @@ -158,7 +161,7 @@ replace_char(char *str, char from, char to) } static void -ftp_write_str_common(unsigned status, const char *str, char sep) +cmdio_write(unsigned status, const char *str) { char *escaped_str, *response; int len; @@ -167,7 +170,7 @@ ftp_write_str_common(unsigned status, const char *str, char sep) * In telnet, 0xff is an escape char, and needs to be escaped: */ escaped_str = replace_text(str, '\xff', "\xff\xff"); - response = xasprintf("%u%c%s\r", status, sep, escaped_str); + response = xasprintf("%u%s\r", status, escaped_str); free(escaped_str); /* ?! does FTP send embedded LFs as NULs? wow */ @@ -175,32 +178,27 @@ ftp_write_str_common(unsigned status, const char *str, char sep) replace_char(response, '\n', '\0'); response[len++] = '\n'; /* tack on trailing '\n' */ - xwrite(STDIN_FILENO, response, len); + xwrite(STDOUT_FILENO, response, len); free(response); } -static void -cmdio_write(int status, const char *p_text) -{ - ftp_write_str_common(status, p_text, ' '); -} - static void cmdio_write_ok(int status) { - ftp_write_str_common(status, "Operation successful", ' '); + fdprintf(STDOUT_FILENO, "%u Operation successful\r\n", status); } +/* TODO: output strerr(errno) if errno != 0? */ static void -cmdio_write_hyphen(int status, const char *p_text) +cmdio_write_error(int status) { - ftp_write_str_common(status, p_text, '-'); + fdprintf(STDOUT_FILENO, "%u Error\r\n", status); } static void cmdio_write_raw(const char *p_text) { - xwrite_str(STDIN_FILENO, p_text); + xwrite_str(STDOUT_FILENO, p_text); } /* Simple commands */ @@ -217,7 +215,7 @@ handle_pwd(void) /* We have to promote each " to "" */ promoted_cwd = replace_text(cwd, '\"', "\"\""); free(cwd); - response = xasprintf("\"%s\"", promoted_cwd); + response = xasprintf(" \"%s\"", promoted_cwd); free(promoted_cwd); cmdio_write(FTP_PWDOK, response); free(response); @@ -227,7 +225,7 @@ static void handle_cwd(void) { if (!G.ftp_arg || chdir(G.ftp_arg) != 0) { - cmdio_write(FTP_FILEFAIL, "Can't change directory"); + cmdio_write_error(FTP_FILEFAIL); return; } cmdio_write_ok(FTP_CWDOK); @@ -240,41 +238,40 @@ handle_cdup(void) handle_cwd(); } -static void -handle_type(void) -{ - if (G.ftp_arg - && ( ((G.ftp_arg[0] | 0x20) == 'i' && G.ftp_arg[1] == '\0') - || !strcasecmp(G.ftp_arg, "L8") - || !strcasecmp(G.ftp_arg, "L 8") - ) - ) { - cmdio_write_ok(FTP_TYPEOK); - } else { - cmdio_write(FTP_BADCMD, "Unrecognised TYPE command"); - } -} +//static void +//handle_type(void) +//{ +// if (G.ftp_arg +// && ( ((G.ftp_arg[0] | 0x20) == 'i' && G.ftp_arg[1] == '\0') +// || !strcasecmp(G.ftp_arg, "L8") +// || !strcasecmp(G.ftp_arg, "L 8") +// ) +// ) { +// cmdio_write_ok(FTP_TYPEOK); +// } else { +// cmdio_write_error(FTP_BADCMD); +// } +//} static void handle_stat(void) { - cmdio_write_hyphen(FTP_STATOK, "FTP server status:"); - cmdio_write_raw(" TYPE: BINARY\r\n"); - cmdio_write_ok(FTP_STATOK); + cmdio_write_raw(STR(FTP_STATOK)"-FTP server status:\r\n" + "TYPE: BINARY\r\n" + STR(FTP_STATOK)" Ok\r\n"); } static void handle_help(void) { - cmdio_write_hyphen(FTP_HELP, "Recognized commands:"); - cmdio_write_raw(" ALLO CDUP CWD HELP LIST\r\n" - " MODE NLST NOOP PASS PASV PORT PWD QUIT\r\n" - " REST RETR STAT STRU SYST TYPE USER\r\n" + cmdio_write_raw(STR(FTP_HELP)"-Commands:\r\n" + "ALLO CDUP CWD HELP LIST\r\n" + "MODE NLST NOOP PASS PASV PORT PWD QUIT\r\n" + "REST RETR STAT STRU SYST TYPE USER\r\n" #if ENABLE_FEATURE_FTP_WRITE - " APPE DELE MKD RMD RNFR RNTO STOR STOU\r\n" + "APPE DELE MKD RMD RNFR RNTO STOR STOU\r\n" #endif - ); - cmdio_write(FTP_HELP, "Help OK"); + STR(FTP_HELP)" Ok\r\n"); } /* Download commands */ @@ -302,7 +299,7 @@ ftpdataio_get_pasv_fd(void) remote_fd = accept(G.pasv_listen_fd, NULL, 0); if (remote_fd < 0) { - cmdio_write(FTP_BADSENDCONN, "Can't establish connection"); + cmdio_write_error(FTP_BADSENDCONN); return remote_fd; } @@ -372,7 +369,7 @@ static int data_transfer_checks_ok(void) { if (!pasv_active() && !port_active()) { - cmdio_write(FTP_BADSENDCONN, "Use PORT or PASV first"); + cmdio_write_raw(STR(FTP_BADSENDCONN)" Use PORT or PASV first\r\n"); return 0; } @@ -425,7 +422,7 @@ handle_pasv(void) addr = xmalloc_sockaddr2dotted_noport(&G.local_addr->u.sa); replace_char(addr, '.', ','); - response = xasprintf("Entering Passive Mode (%s,%u,%u)", + response = xasprintf(" Entering Passive Mode (%s,%u,%u)", addr, (int)(port >> 8), (int)(port & 255)); free(addr); @@ -466,7 +463,7 @@ handle_port(void) if (lsa == NULL) { bail: - cmdio_write(FTP_BADCMD, "Illegal PORT command"); + cmdio_write_error(FTP_BADCMD); return; } @@ -500,14 +497,14 @@ handle_retr(void) /* O_NONBLOCK is useful if file happens to be a device node */ opened_file = G.ftp_arg ? open(G.ftp_arg, O_RDONLY | O_NONBLOCK) : -1; if (opened_file < 0) { - cmdio_write(FTP_FILEFAIL, "Can't open file"); + cmdio_write_error(FTP_FILEFAIL); return; } retval = fstat(opened_file, &statbuf); if (retval < 0 || !S_ISREG(statbuf.st_mode)) { /* Note - pretend open failed */ - cmdio_write(FTP_FILEFAIL, "Can't open file"); + cmdio_write_error(FTP_FILEFAIL); goto file_close_out; } @@ -521,7 +518,7 @@ handle_retr(void) xlseek(opened_file, offset, SEEK_SET); response = xasprintf( - "Opening BINARY mode data connection for %s (%"OFF_FMT"u bytes)", + " Opening BINARY mode data connection for %s (%"OFF_FMT"u bytes)", G.ftp_arg, statbuf.st_size); remote_fd = get_remote_transfer_fd(response); free(response); @@ -531,7 +528,7 @@ handle_retr(void) trans_ret = bb_copyfd_eof(opened_file, remote_fd); ftpdataio_dispose_transfer_fd(); if (trans_ret < 0) - cmdio_write(FTP_BADSENDFILE, "Error sending local file"); + cmdio_write_error(FTP_BADSENDFILE); else cmdio_write_ok(FTP_TRANSFEROK); @@ -681,9 +678,9 @@ handle_dir_common(int full_details, int stat_cmd) if (stat_cmd) { fd = STDIN_FILENO; - cmdio_write_hyphen(FTP_STATFILE_OK, "Status follows:"); + cmdio_write_raw(STR(FTP_STATFILE_OK)"-Status follows:\r\n"); } else { - fd = get_remote_transfer_fd("Here comes the directory listing"); + fd = get_remote_transfer_fd(" Here comes the directory listing"); if (fd < 0) goto bail; } @@ -735,7 +732,7 @@ static void handle_mkd(void) { if (!G.ftp_arg || mkdir(G.ftp_arg, 0777) != 0) { - cmdio_write(FTP_FILEFAIL, "Create directory operation failed"); + cmdio_write_error(FTP_FILEFAIL); return; } cmdio_write_ok(FTP_MKDIROK); @@ -745,7 +742,7 @@ static void handle_rmd(void) { if (!G.ftp_arg || rmdir(G.ftp_arg) != 0) { - cmdio_write(FTP_FILEFAIL, "Deletion failed"); + cmdio_write_error(FTP_FILEFAIL); return; } cmdio_write_ok(FTP_RMDIROK); @@ -755,7 +752,7 @@ static void handle_dele(void) { if (!G.ftp_arg || unlink(G.ftp_arg) != 0) { - cmdio_write(FTP_FILEFAIL, "Deletion failed"); + cmdio_write_error(FTP_FILEFAIL); return; } cmdio_write_ok(FTP_DELEOK); @@ -764,19 +761,7 @@ handle_dele(void) static void handle_rnfr(void) { - struct stat statbuf; - - /* Clear old value */ free(G.rnfr_filename); - G.rnfr_filename = NULL; - - if (!G.ftp_arg - || stat(G.ftp_arg, &statbuf) != 0 - /* || it isn't a regular file or a directory? */ - ) { - cmdio_write(FTP_FILEFAIL, "RNFR command failed"); - return; - } G.rnfr_filename = xstrdup(G.ftp_arg); cmdio_write_ok(FTP_RNFROK); } @@ -788,7 +773,7 @@ handle_rnto(void) /* If we didn't get a RNFR, throw a wobbly */ if (G.rnfr_filename == NULL || G.ftp_arg == NULL) { - cmdio_write(FTP_NEEDRNFR, "RNFR required first"); + cmdio_write_raw(STR(FTP_NEEDRNFR)" RNFR required first\r\n"); return; } @@ -797,7 +782,7 @@ handle_rnto(void) G.rnfr_filename = NULL; if (retval) { - cmdio_write(FTP_FILEFAIL, "Rename failed"); + cmdio_write_error(FTP_FILEFAIL); return; } cmdio_write_ok(FTP_RENAMEOK); @@ -820,8 +805,8 @@ handle_upload_common(int is_append, int is_unique) local_file_fd = -1; if (is_unique) { - tempname = xstrdup("FILE: uniq.XXXXXX"); - local_file_fd = mkstemp(tempname + 6); + tempname = xstrdup(" FILE: uniq.XXXXXX"); + local_file_fd = mkstemp(tempname + 7); } else if (G.ftp_arg) { int flags = O_WRONLY | O_CREAT | O_TRUNC; if (is_append) @@ -831,7 +816,7 @@ handle_upload_common(int is_append, int is_unique) local_file_fd = open(G.ftp_arg, flags, 0666); } if (local_file_fd < 0) { - cmdio_write(FTP_UPLOADFAIL, "Can't create file"); + cmdio_write_error(FTP_UPLOADFAIL); return; } @@ -840,7 +825,7 @@ handle_upload_common(int is_append, int is_unique) if (offset) xlseek(local_file_fd, offset, SEEK_SET); - remote_fd = get_remote_transfer_fd(tempname ? tempname : "Ok to send data"); + remote_fd = get_remote_transfer_fd(tempname ? tempname : " Ok to send data"); free(tempname); if (remote_fd < 0) @@ -850,7 +835,7 @@ handle_upload_common(int is_append, int is_unique) ftpdataio_dispose_transfer_fd(); if (trans_ret < 0) - cmdio_write(FTP_BADSENDFILE, "Failure writing to local file"); + cmdio_write_error(FTP_BADSENDFILE); else cmdio_write_ok(FTP_TRANSFEROK); @@ -949,7 +934,7 @@ int ftpd_main(int argc UNUSED_PARAM, char **argv) setsockopt(STDIN_FILENO, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1)); setsockopt(STDIN_FILENO, SOL_SOCKET, SO_OOBINLINE, &const_int_1, sizeof(const_int_1)); - cmdio_write(FTP_GREET, "Welcome"); + cmdio_write_raw(STR(FTP_GREET)" Welcome\r\n"); #ifdef IF_WE_WANT_TO_REQUIRE_LOGIN { @@ -959,20 +944,20 @@ int ftpd_main(int argc UNUSED_PARAM, char **argv) if (cmdval == const_USER) { if (G.ftp_arg == NULL || strcasecmp(G.ftp_arg, "anonymous") != 0) - cmdio_write(FTP_LOGINERR, "Server is anonymous only"); + cmdio_write_raw(STR(FTP_LOGINERR)" Server is anonymous only\r\n"); else { user_was_specified = 1; - cmdio_write(FTP_GIVEPWORD, "Please specify the password"); + cmdio_write_raw(STR(FTP_GIVEPWORD)" Please specify the password\r\n"); } } else if (cmdval == const_PASS) { if (user_was_specified) break; - cmdio_write(FTP_NEEDUSER, "Login with USER"); + cmdio_write_raw(STR(FTP_NEEDUSER)" Login with USER\r\n"); } else if (cmdval == const_QUIT) { - cmdio_write(FTP_GOODBYE, "Goodbye"); + cmdio_write_raw(STR(FTP_GOODBYE)" Goodbye\r\n"); return 0; } else { - cmdio_write(FTP_LOGINERR, "Login with USER and PASS"); + cmdio_write_raw(STR(FTP_LOGINERR)" Login with USER and PASS\r\n"); } } } @@ -1021,7 +1006,7 @@ int ftpd_main(int argc UNUSED_PARAM, char **argv) uint32_t cmdval = cmdio_get_cmd_and_arg(); if (cmdval == const_QUIT) { - cmdio_write(FTP_GOODBYE, "Goodbye"); + cmdio_write_raw(STR(FTP_GOODBYE)" Goodbye\r\n"); return 0; } if (cmdval == const_PWD) @@ -1037,13 +1022,14 @@ int ftpd_main(int argc UNUSED_PARAM, char **argv) else if (cmdval == const_NOOP) cmdio_write_ok(FTP_NOOPOK); else if (cmdval == const_SYST) - cmdio_write(FTP_SYSTOK, "UNIX Type: L8"); + cmdio_write_raw(STR(FTP_SYSTOK)" UNIX Type: L8\r\n"); else if (cmdval == const_HELP) handle_help(); else if (cmdval == const_LIST) /* ls -l */ handle_list(); else if (cmdval == const_TYPE) - handle_type(); + //handle_type(); + cmdio_write_ok(FTP_TYPEOK); else if (cmdval == const_PORT) handle_port(); else if (cmdval == const_REST) @@ -1055,20 +1041,20 @@ int ftpd_main(int argc UNUSED_PARAM, char **argv) // && (G.ftp_arg[0] | 0x20) == 'f' // && G.ftp_arg[1] == '\0' //) { - cmdio_write(FTP_STRUOK, "Command ignored"); + cmdio_write_ok(FTP_STRUOK); //} else - // cmdio_write(FTP_BADSTRU, "Bad STRU command"); + // cmdio_write_raw(STR(FTP_BADSTRU)" Bad STRU command\r\n"); } else if (cmdval == const_MODE) { //if (G.ftp_arg // && (G.ftp_arg[0] | 0x20) == 's' // && G.ftp_arg[1] == '\0' //) { - cmdio_write(FTP_MODEOK, "Command ignored"); + cmdio_write_ok(FTP_MODEOK); //} else - // cmdio_write(FTP_BADMODE, "Bad MODE command"); + // cmdio_write_raw(STR(FTP_BADMODE)" Bad MODE command\r\n"); } else if (cmdval == const_ALLO) - cmdio_write(FTP_ALLOOK, "Command ignored"); + cmdio_write_ok(FTP_ALLOOK); else if (cmdval == const_STAT) { if (G.ftp_arg == NULL) handle_stat(); @@ -1076,10 +1062,10 @@ int ftpd_main(int argc UNUSED_PARAM, char **argv) handle_stat_file(); } else if (cmdval == const_USER) { /* FTP_LOGINERR confuses clients: */ - /* cmdio_write(FTP_LOGINERR, "Can't change to another user"); */ - cmdio_write(FTP_GIVEPWORD, "Command ignored"); + /* cmdio_write_raw(STR(FTP_LOGINERR)" Can't change to another user\r\n"); */ + cmdio_write_ok(FTP_GIVEPWORD); } else if (cmdval == const_PASS) - cmdio_write(FTP_LOGINOK, "Command ignored"); + cmdio_write_ok(FTP_LOGINOK); #if ENABLE_FEATURE_FTP_WRITE else if (G.opts & OPT_w) { if (cmdval == const_STOR) @@ -1110,17 +1096,18 @@ int ftpd_main(int argc UNUSED_PARAM, char **argv) || cmdval == const_APPE || cmdval == const_STOU ) { - cmdio_write(FTP_NOPERM, "Permission denied"); + cmdio_write_raw(STR(FTP_NOPERM)" Permission denied\r\n"); } #endif else { /* Which unsupported commands were seen in the wild? * (doesn't necessarily mean "we must support them") - * wget 1.11.4: SIZE - todo. - * lftp 3.6.3: MDTM - works fine without it anyway. - * IPv6-style PASV: "EPSV 2" + * wget 1.11.4: SIZE - todo + * lftp 3.6.3: FEAT - is it useful? + * MDTM - works fine without it anyway + * IPv6-style PASV: "EPSV 2" - todo */ - cmdio_write(FTP_BADCMD, "Unknown command"); + cmdio_write_raw(STR(FTP_BADCMD)" Unknown command\r\n"); } } }