Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * Copyright (c) 2014 Lukasz Marek <lukasz.m.luki@gmail.com>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include <libsmbclient.h>
  22. #include "libavutil/avstring.h"
  23. #include "libavutil/opt.h"
  24. #include "avformat.h"
  25. #include "internal.h"
  26. #include "url.h"
  27.  
  28. typedef struct {
  29.     const AVClass *class;
  30.     SMBCCTX *ctx;
  31.     int dh;
  32.     int fd;
  33.     int64_t filesize;
  34.     int trunc;
  35.     int timeout;
  36.     char *workgroup;
  37. } LIBSMBContext;
  38.  
  39. static void libsmbc_get_auth_data(SMBCCTX *c, const char *server, const char *share,
  40.                                   char *workgroup, int workgroup_len,
  41.                                   char *username, int username_len,
  42.                                   char *password, int password_len)
  43. {
  44.     /* Do nothing yet. Credentials are passed via url.
  45.      * Callback must exists, there might be a segmentation fault otherwise. */
  46. }
  47.  
  48. static av_cold int libsmbc_connect(URLContext *h)
  49. {
  50.     LIBSMBContext *libsmbc = h->priv_data;
  51.  
  52.     libsmbc->ctx = smbc_new_context();
  53.     if (!libsmbc->ctx) {
  54.         int ret = AVERROR(errno);
  55.         av_log(h, AV_LOG_ERROR, "Cannot create context: %s.\n", strerror(errno));
  56.         return ret;
  57.     }
  58.     if (!smbc_init_context(libsmbc->ctx)) {
  59.         int ret = AVERROR(errno);
  60.         av_log(h, AV_LOG_ERROR, "Cannot initialize context: %s.\n", strerror(errno));
  61.         return ret;
  62.     }
  63.     smbc_set_context(libsmbc->ctx);
  64.  
  65.     smbc_setOptionUserData(libsmbc->ctx, h);
  66.     smbc_setFunctionAuthDataWithContext(libsmbc->ctx, libsmbc_get_auth_data);
  67.  
  68.     if (libsmbc->timeout != -1)
  69.         smbc_setTimeout(libsmbc->ctx, libsmbc->timeout);
  70.     if (libsmbc->workgroup)
  71.         smbc_setWorkgroup(libsmbc->ctx, libsmbc->workgroup);
  72.  
  73.     if (smbc_init(NULL, 0) < 0) {
  74.         int ret = AVERROR(errno);
  75.         av_log(h, AV_LOG_ERROR, "Initialization failed: %s\n", strerror(errno));
  76.         return ret;
  77.     }
  78.     return 0;
  79. }
  80.  
  81. static av_cold int libsmbc_close(URLContext *h)
  82. {
  83.     LIBSMBContext *libsmbc = h->priv_data;
  84.     if (libsmbc->fd >= 0) {
  85.         smbc_close(libsmbc->fd);
  86.         libsmbc->fd = -1;
  87.     }
  88.     if (libsmbc->ctx) {
  89.         smbc_free_context(libsmbc->ctx, 1);
  90.         libsmbc->ctx = NULL;
  91.     }
  92.     return 0;
  93. }
  94.  
  95. static av_cold int libsmbc_open(URLContext *h, const char *url, int flags)
  96. {
  97.     LIBSMBContext *libsmbc = h->priv_data;
  98.     int access, ret;
  99.     struct stat st;
  100.  
  101.     libsmbc->fd = -1;
  102.     libsmbc->filesize = -1;
  103.  
  104.     if ((ret = libsmbc_connect(h)) < 0)
  105.         goto fail;
  106.  
  107.     if ((flags & AVIO_FLAG_WRITE) && (flags & AVIO_FLAG_READ)) {
  108.         access = O_CREAT | O_RDWR;
  109.         if (libsmbc->trunc)
  110.             access |= O_TRUNC;
  111.     } else if (flags & AVIO_FLAG_WRITE) {
  112.         access = O_CREAT | O_WRONLY;
  113.         if (libsmbc->trunc)
  114.             access |= O_TRUNC;
  115.     } else
  116.         access = O_RDONLY;
  117.  
  118.     /* 0666 = -rw-rw-rw- = read+write for everyone, minus umask */
  119.     if ((libsmbc->fd = smbc_open(url, access, 0666)) < 0) {
  120.         ret = AVERROR(errno);
  121.         av_log(h, AV_LOG_ERROR, "File open failed: %s\n", strerror(errno));
  122.         goto fail;
  123.     }
  124.  
  125.     if (smbc_fstat(libsmbc->fd, &st) < 0)
  126.         av_log(h, AV_LOG_WARNING, "Cannot stat file: %s\n", strerror(errno));
  127.     else
  128.         libsmbc->filesize = st.st_size;
  129.  
  130.     return 0;
  131.   fail:
  132.     libsmbc_close(h);
  133.     return ret;
  134. }
  135.  
  136. static int64_t libsmbc_seek(URLContext *h, int64_t pos, int whence)
  137. {
  138.     LIBSMBContext *libsmbc = h->priv_data;
  139.     int64_t newpos;
  140.  
  141.     if (whence == AVSEEK_SIZE) {
  142.         if (libsmbc->filesize == -1) {
  143.             av_log(h, AV_LOG_ERROR, "Error during seeking: filesize is unknown.\n");
  144.             return AVERROR(EIO);
  145.         } else
  146.             return libsmbc->filesize;
  147.     }
  148.  
  149.     if ((newpos = smbc_lseek(libsmbc->fd, pos, whence)) < 0) {
  150.         int err = errno;
  151.         av_log(h, AV_LOG_ERROR, "Error during seeking: %s\n", strerror(err));
  152.         return AVERROR(err);
  153.     }
  154.  
  155.     return newpos;
  156. }
  157.  
  158. static int libsmbc_read(URLContext *h, unsigned char *buf, int size)
  159. {
  160.     LIBSMBContext *libsmbc = h->priv_data;
  161.     int bytes_read;
  162.  
  163.     if ((bytes_read = smbc_read(libsmbc->fd, buf, size)) < 0) {
  164.         int ret = AVERROR(errno);
  165.         av_log(h, AV_LOG_ERROR, "Read error: %s\n", strerror(errno));
  166.         return ret;
  167.     }
  168.  
  169.     return bytes_read;
  170. }
  171.  
  172. static int libsmbc_write(URLContext *h, const unsigned char *buf, int size)
  173. {
  174.     LIBSMBContext *libsmbc = h->priv_data;
  175.     int bytes_written;
  176.  
  177.     if ((bytes_written = smbc_write(libsmbc->fd, buf, size)) < 0) {
  178.         int ret = AVERROR(errno);
  179.         av_log(h, AV_LOG_ERROR, "Write error: %s\n", strerror(errno));
  180.         return ret;
  181.     }
  182.  
  183.     return bytes_written;
  184. }
  185.  
  186. static int libsmbc_open_dir(URLContext *h)
  187. {
  188.     LIBSMBContext *libsmbc = h->priv_data;
  189.     int ret;
  190.  
  191.     if ((ret = libsmbc_connect(h)) < 0)
  192.         goto fail;
  193.  
  194.     if ((libsmbc->dh = smbc_opendir(h->filename)) < 0) {
  195.         ret = AVERROR(errno);
  196.         av_log(h, AV_LOG_ERROR, "Error opening dir: %s\n", strerror(errno));
  197.         goto fail;
  198.     }
  199.  
  200.     return 0;
  201.  
  202.   fail:
  203.     libsmbc_close(h);
  204.     return ret;
  205. }
  206.  
  207. static int libsmbc_read_dir(URLContext *h, AVIODirEntry **next)
  208. {
  209.     LIBSMBContext *libsmbc = h->priv_data;
  210.     AVIODirEntry *entry;
  211.     struct smbc_dirent *dirent = NULL;
  212.     char *url = NULL;
  213.     int skip_entry;
  214.  
  215.     *next = entry = ff_alloc_dir_entry();
  216.     if (!entry)
  217.         return AVERROR(ENOMEM);
  218.  
  219.     do {
  220.         skip_entry = 0;
  221.         dirent = smbc_readdir(libsmbc->dh);
  222.         if (!dirent) {
  223.             av_freep(next);
  224.             return 0;
  225.         }
  226.         switch (dirent->smbc_type) {
  227.         case SMBC_DIR:
  228.             entry->type = AVIO_ENTRY_DIRECTORY;
  229.             break;
  230.         case SMBC_FILE:
  231.             entry->type = AVIO_ENTRY_FILE;
  232.             break;
  233.         case SMBC_FILE_SHARE:
  234.             entry->type = AVIO_ENTRY_SHARE;
  235.             break;
  236.         case SMBC_SERVER:
  237.             entry->type = AVIO_ENTRY_SERVER;
  238.             break;
  239.         case SMBC_WORKGROUP:
  240.             entry->type = AVIO_ENTRY_WORKGROUP;
  241.             break;
  242.         case SMBC_COMMS_SHARE:
  243.         case SMBC_IPC_SHARE:
  244.         case SMBC_PRINTER_SHARE:
  245.             skip_entry = 1;
  246.             break;
  247.         case SMBC_LINK:
  248.         default:
  249.             entry->type = AVIO_ENTRY_UNKNOWN;
  250.             break;
  251.         }
  252.     } while (skip_entry || !strcmp(dirent->name, ".") ||
  253.              !strcmp(dirent->name, ".."));
  254.  
  255.     entry->name = av_strdup(dirent->name);
  256.     if (!entry->name) {
  257.         av_freep(next);
  258.         return AVERROR(ENOMEM);
  259.     }
  260.  
  261.     url = av_append_path_component(h->filename, dirent->name);
  262.     if (url) {
  263.         struct stat st;
  264.         if (!smbc_stat(url, &st)) {
  265.             entry->group_id = st.st_gid;
  266.             entry->user_id = st.st_uid;
  267.             entry->size = st.st_size;
  268.             entry->filemode = st.st_mode & 0777;
  269.             entry->modification_timestamp = INT64_C(1000000) * st.st_mtime;
  270.             entry->access_timestamp =  INT64_C(1000000) * st.st_atime;
  271.             entry->status_change_timestamp = INT64_C(1000000) * st.st_ctime;
  272.         }
  273.         av_free(url);
  274.     }
  275.  
  276.     return 0;
  277. }
  278.  
  279. static int libsmbc_close_dir(URLContext *h)
  280. {
  281.     LIBSMBContext *libsmbc = h->priv_data;
  282.     if (libsmbc->dh >= 0) {
  283.         smbc_closedir(libsmbc->dh);
  284.         libsmbc->dh = -1;
  285.     }
  286.     libsmbc_close(h);
  287.     return 0;
  288. }
  289.  
  290. static int libsmbc_delete(URLContext *h)
  291. {
  292.     LIBSMBContext *libsmbc = h->priv_data;
  293.     int ret;
  294.     struct stat st;
  295.  
  296.     if ((ret = libsmbc_connect(h)) < 0)
  297.         goto cleanup;
  298.  
  299.     if ((libsmbc->fd = smbc_open(h->filename, O_WRONLY, 0666)) < 0) {
  300.         ret = AVERROR(errno);
  301.         goto cleanup;
  302.     }
  303.  
  304.     if (smbc_fstat(libsmbc->fd, &st) < 0) {
  305.         ret = AVERROR(errno);
  306.         goto cleanup;
  307.     }
  308.  
  309.     smbc_close(libsmbc->fd);
  310.     libsmbc->fd = -1;
  311.  
  312.     if (S_ISDIR(st.st_mode)) {
  313.         if (smbc_rmdir(h->filename) < 0) {
  314.             ret = AVERROR(errno);
  315.             goto cleanup;
  316.         }
  317.     } else {
  318.         if (smbc_unlink(h->filename) < 0) {
  319.             ret = AVERROR(errno);
  320.             goto cleanup;
  321.         }
  322.     }
  323.  
  324.     ret = 0;
  325.  
  326. cleanup:
  327.     libsmbc_close(h);
  328.     return ret;
  329. }
  330.  
  331. static int libsmbc_move(URLContext *h_src, URLContext *h_dst)
  332. {
  333.     LIBSMBContext *libsmbc = h_src->priv_data;
  334.     int ret;
  335.  
  336.     if ((ret = libsmbc_connect(h_src)) < 0)
  337.         goto cleanup;
  338.  
  339.     if ((libsmbc->dh = smbc_rename(h_src->filename, h_dst->filename)) < 0) {
  340.         ret = AVERROR(errno);
  341.         goto cleanup;
  342.     }
  343.  
  344.     ret = 0;
  345.  
  346. cleanup:
  347.     libsmbc_close(h_src);
  348.     return ret;
  349. }
  350.  
  351. #define OFFSET(x) offsetof(LIBSMBContext, x)
  352. #define D AV_OPT_FLAG_DECODING_PARAM
  353. #define E AV_OPT_FLAG_ENCODING_PARAM
  354. static const AVOption options[] = {
  355.     {"timeout",   "set timeout in ms of socket I/O operations",    OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
  356.     {"truncate",  "truncate existing files on write",              OFFSET(trunc),   AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
  357.     {"workgroup", "set the workgroup used for making connections", OFFSET(workgroup), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
  358.     {NULL}
  359. };
  360.  
  361. static const AVClass libsmbclient_context_class = {
  362.     .class_name     = "libsmbc",
  363.     .item_name      = av_default_item_name,
  364.     .option         = options,
  365.     .version        = LIBAVUTIL_VERSION_INT,
  366. };
  367.  
  368. URLProtocol ff_libsmbclient_protocol = {
  369.     .name                = "smb",
  370.     .url_open            = libsmbc_open,
  371.     .url_read            = libsmbc_read,
  372.     .url_write           = libsmbc_write,
  373.     .url_seek            = libsmbc_seek,
  374.     .url_close           = libsmbc_close,
  375.     .url_delete          = libsmbc_delete,
  376.     .url_move            = libsmbc_move,
  377.     .url_open_dir        = libsmbc_open_dir,
  378.     .url_read_dir        = libsmbc_read_dir,
  379.     .url_close_dir       = libsmbc_close_dir,
  380.     .priv_data_size      = sizeof(LIBSMBContext),
  381.     .priv_data_class     = &libsmbclient_context_class,
  382.     .flags               = URL_PROTOCOL_FLAG_NETWORK,
  383. };
  384.