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-rw-r--r--toys/pending/ftpget.c287
1 files changed, 287 insertions, 0 deletions
diff --git a/toys/pending/ftpget.c b/toys/pending/ftpget.c
new file mode 100644
index 00000000..bd44289e
--- /dev/null
+++ b/toys/pending/ftpget.c
@@ -0,0 +1,287 @@
+/* ftpget.c - Get a remote file from FTP.
+ *
+ * Copyright 2013 Ranjan Kumar <ranjankumar.bth@gmail.com>
+ * Copyright 2013 Kyungwan Han <asura321@gmail.com>
+ *
+ * No Standard.
+ *
+USE_FTPGET(NEWTOY(ftpget, "<2cvu:p:P:", TOYFLAG_BIN))
+USE_FTPGET(OLDTOY(ftpput,ftpget, "<2vu:p:P:", TOYFLAG_BIN))
+
+config FTPGET
+ bool "ftpget/ftpput"
+ default n
+ help
+ usage: ftpget [-cv] [-u username -p password -P PortNumber] HOST_NAME [LOCAL_FILENAME] REMOTE_FILENAME
+ usage: ftpput [-v] [-u username -p password -P PortNumber] HOST_NAME [REMOTE_FILENAME] LOCAL_FILENAME
+
+ ftpget - Get a remote file from FTP.
+ ftpput - Upload a local file on remote machine through FTP.
+
+ -c Continue previous transfer.
+ -v Verbose.
+ -u User name.
+ -p Password.
+ -P Port Number.
+*/
+#define FOR_ftpget
+#include "toys.h"
+
+GLOBALS(
+ char *port;
+ char *password;
+ char *username;
+
+ FILE *sockfp;
+ int c;
+ int isget;
+ char buf[sizeof(struct sockaddr_storage)];
+)
+
+#define DATACONNECTION_OPENED 125
+#define FTPFILE_STATUSOKAY 150
+#define FTP_COMMAND_OKAY 200
+#define FTPFILE_STATUS 213
+#define FTPSERVER_READY 220
+#define CLOSE_DATACONECTION 226
+#define PASSIVE_MODE 227
+#define USERLOGGED_SUCCESS 230
+#define PASSWORD_REQUEST 331
+#define REQUESTED_PENDINGACTION 350
+
+
+static void setport(unsigned port_num)
+{
+ int af = ((struct sockaddr *)TT.buf)->sa_family;
+
+ if (af == AF_INET) ((struct sockaddr_in*)TT.buf)->sin_port = port_num;
+ else if (af == AF_INET6) ((struct sockaddr_in6*)TT.buf)->sin6_port = port_num;
+}
+
+static int connect_to_stream()
+{
+ int sockfd, af = ((struct sockaddr *)TT.buf)->sa_family;
+
+ sockfd = xsocket(af, SOCK_STREAM, 0);
+ if (connect(sockfd, (struct sockaddr*)TT.buf,((af == AF_INET)?
+ sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))) < 0) {
+ close(sockfd);
+ perror_exit("can't connect to remote host");
+ }
+ return sockfd;
+}
+
+//close ftp connection and print the message.
+static void close_stream(char *msg_str)
+{
+ char *str = toybuf; //toybuf holds response data.
+
+ //Remove garbage chars (from ' ' space to '\x7f') DEL remote server response.
+ while ((*str >= 0x20) && (*str < 0x7f)) str++;
+ *str = '\0';
+ if (TT.sockfp) fclose(TT.sockfp);
+ error_exit("%s server response: %s", (msg_str) ? msg_str:"", toybuf);
+}
+
+//send command to ftp and get return status.
+static int get_ftp_response(char *command, char *param)
+{
+ unsigned cmd_status = 0;
+ char *fmt = "%s %s\r\n";
+
+ if (command) {
+ if (!param) fmt += 3;
+ fprintf(TT.sockfp, fmt, command, param);
+ fflush(TT.sockfp);
+ if (toys.optflags & FLAG_v)
+ fprintf(stderr, "FTP Request: %s %s\r\n", command, param);
+ }
+
+ do {
+ if (!fgets(toybuf, sizeof(toybuf)-1, TT.sockfp)) close_stream(NULL);
+ } while (!isdigit(toybuf[0]) || toybuf[3] != ' ');
+
+ toybuf[3] = '\0';
+ cmd_status = atolx_range(toybuf, 0, INT_MAX);
+ toybuf[3] = ' ';
+ return cmd_status;
+}
+
+static void send_requests(void)
+{
+ int cmd_status = 0;
+
+ //FTP connection request.
+ if (get_ftp_response(NULL, NULL) != FTPSERVER_READY) close_stream(NULL);
+
+ //230 User authenticated, password please; 331 Password request.
+ cmd_status = get_ftp_response("USER", TT.username);
+ if (cmd_status == PASSWORD_REQUEST) { //user logged in. Need Password.
+ if (get_ftp_response("PASS", TT.password) != USERLOGGED_SUCCESS)
+ close_stream("PASS");
+ } else if (cmd_status == USERLOGGED_SUCCESS); //do nothing
+ else close_stream("USER");
+ //200 Type Binary. Command okay.
+ if (get_ftp_response("TYPE I", NULL) != FTP_COMMAND_OKAY)
+ close_stream("TYPE I");
+}
+
+static void get_sockaddr(char *host)
+{
+ struct addrinfo hints, *result;
+ char *ptr;
+ int status, port;
+
+ errno = 0;
+ port = strtoul(TT.port, &ptr, 10);
+ if (errno || port > 65535) error_exit("Invalid port, Range is [0-65535]");
+
+ memset(&hints, 0 , sizeof(struct addrinfo));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+
+ status = getaddrinfo(host, TT.port, &hints, &result);
+ if (status) error_exit("bad address '%s' : %s", host, gai_strerror(status));
+
+ memcpy(TT.buf, result->ai_addr, result->ai_addrlen);
+ freeaddrinfo(result);
+}
+
+// send commands to ftp fo PASV mode.
+static void verify_pasv_mode(char *r_filename)
+{
+ char *pch;
+ unsigned portnum;
+
+ //vsftpd reply like:- "227 Entering Passive Mode (125,19,39,117,43,39)".
+ if (get_ftp_response("PASV", NULL) != PASSIVE_MODE) close_stream("PASV");
+
+ //Response is "NNN <some text> (N1,N2,N3,N4,P1,P2) garbage.
+ //Server's IP is N1.N2.N3.N4
+ //Server's port for data connection is P1*256+P2.
+ if ((pch = strrchr(toybuf, ')'))) *pch = '\0';
+ if ((pch = strrchr(toybuf, ','))) *pch = '\0';
+ portnum = atolx_range(pch + 1, 0, 255);
+
+ if ((pch = strrchr(toybuf, ','))) *pch = '\0';
+ portnum = portnum + (atolx_range(pch + 1, 0, 255) * 256);
+ setport(htons(portnum));
+
+ if (TT.isget && get_ftp_response("SIZE", r_filename) != FTPFILE_STATUS)
+ TT.c = 0;
+}
+
+/*
+ * verify the local file presence.
+ * if present, get the size of the file.
+ */
+static void is_localfile_present(char *l_filename)
+{
+ struct stat sb;
+
+ if (stat(l_filename, &sb) < 0) perror_exit("stat");
+ //if local file present, then request for pending file action.
+ if (sb.st_size > 0) {
+ sprintf(toybuf, "REST %lu", (unsigned long) sb.st_size);
+ if (get_ftp_response(toybuf, NULL) != REQUESTED_PENDINGACTION) TT.c = 0;
+ } else TT.c = 0;
+}
+
+static void transfer_file(int local_fd, int remote_fd)
+{
+ int len, rfd = (TT.isget)?remote_fd:local_fd,
+ wfd = (TT.isget)?local_fd:remote_fd;
+
+ if (rfd < 0 || wfd < 0) error_exit("Error in file creation:");
+ while ((len = xread(rfd, toybuf, sizeof(toybuf)))) xwrite(wfd, toybuf, len);
+}
+
+static void get_file(char *l_filename, char *r_filename)
+{
+ int local_fd = -1, remote_fd;
+
+ verify_pasv_mode(r_filename);
+ remote_fd = connect_to_stream(); //Connect to data socket.
+
+ //if local file name will be '-' then local fd will be stdout.
+ if ((l_filename[0] == '-') && !l_filename[1]) {
+ local_fd = 1; //file descriptor will become stdout.
+ TT.c = 0;
+ }
+
+ //if continue, check for local file existance.
+ if (TT.c) is_localfile_present(l_filename);
+
+ //verify the remote file presence.
+ if (get_ftp_response("RETR", r_filename) > FTPFILE_STATUSOKAY)
+ close_stream("RETR");
+
+ //if local fd is not stdout, create a file descriptor.
+ if (local_fd == -1) {
+ int flags = O_WRONLY;
+
+ flags |= (TT.c)? O_APPEND : (O_CREAT | O_TRUNC);
+ local_fd = xcreate((char *)l_filename, flags, 0666);
+ }
+ transfer_file(local_fd, remote_fd);
+ xclose(remote_fd);
+ xclose(local_fd);
+ if (get_ftp_response(NULL, NULL) != CLOSE_DATACONECTION) close_stream(NULL);
+ get_ftp_response("QUIT", NULL);
+ toys.exitval = EXIT_SUCCESS;
+}
+
+static void put_file(char *r_filename, char *l_filename)
+{
+ int local_fd = 0, remote_fd;
+ unsigned cmd_status = 0;
+
+ verify_pasv_mode(r_filename);
+ remote_fd = connect_to_stream(); //Connect to data socket.
+
+ //open the local file for transfer.
+ if ((l_filename[0] != '-') || l_filename[1])
+ local_fd = xcreate((char *)l_filename, O_RDONLY, 0666);
+
+ //verify for the remote file status, Ok or Open: transfer File.
+ cmd_status = get_ftp_response("STOR", r_filename);
+ if ( (cmd_status == DATACONNECTION_OPENED) ||
+ (cmd_status == FTPFILE_STATUSOKAY)) {
+ transfer_file(local_fd, remote_fd);
+ if (get_ftp_response(NULL, NULL) != CLOSE_DATACONECTION) close_stream(NULL);
+ get_ftp_response("QUIT", NULL);
+ toys.exitval = EXIT_SUCCESS;
+ } else {
+ toys.exitval = EXIT_FAILURE;
+ close_stream("STOR");
+ }
+ xclose(remote_fd);
+ xclose(local_fd);
+}
+
+void ftpget_main(void)
+{
+ char **argv = toys.optargs; //host name + file name.
+
+ TT.isget = toys.which->name[3] == 'g';
+ TT.c = 1;
+ //if user name is not specified.
+ if (!(toys.optflags & FLAG_u) && (toys.optflags & FLAG_p))
+ error_exit("Missing username:");
+ //if user name and password is not specified in command line.
+ if (!(toys.optflags & FLAG_u) && !(toys.optflags & FLAG_p))
+ TT.username = TT.password ="anonymous";
+
+ if (!(toys.optflags & FLAG_P)) TT.port = "ftp"; //use default ftp port 21.
+ //if continue is not in the command line argument.
+ if (TT.isget && !(toys.optflags & FLAG_c)) TT.c = 0;
+
+ if (toys.optflags & FLAG_v) fprintf(stderr, "Connecting to %s\n", argv[0]);
+ get_sockaddr(argv[0]);
+
+ TT.sockfp = xfdopen(connect_to_stream(), "r+");
+ send_requests();
+
+ if (TT.isget) get_file(argv[1], argv[2] ? argv[2] : argv[1]);
+ else put_file(argv[1], argv[2] ? argv[2] : argv[1]);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 06:16:20 +0000