vsftpd_1.2.1_twoprocess.c_process_login_req

source

twoprocess.c

line

171 - 241

処理の流れ

   171 static void
   172 process_login_req(struct vsf_session* p_sess)
   173 {
   174   enum EVSFPrivopLoginResult e_login_result = kVSFLoginNull;
   175   char cmd;
   176   vsf_sysutil_unblock_sig(kVSFSysUtilSigCHLD);
   177   /* Blocks */
   178   cmd = priv_sock_get_cmd(p_sess);
   179   vsf_sysutil_block_sig(kVSFSysUtilSigCHLD);
   180   if (cmd != PRIV_SOCK_LOGIN)
   181   {
   182     die("bad request");
   183   }
   184   /* Get username and password - we must distrust these */
   185   {
   186     struct mystr password_str = INIT_MYSTR;
   187     priv_sock_get_str(p_sess, &p_sess->user_str);
   188     priv_sock_get_str(p_sess, &password_str);
   189     e_login_result = vsf_privop_do_login(p_sess, &password_str);
   190     str_free(&password_str);
   191   }
   192   switch (e_login_result)
   193   {
   194     case kVSFLoginFail:
   195       priv_sock_send_result(p_sess, PRIV_SOCK_RESULT_BAD);
   196       return;
   197       break;
   198     case kVSFLoginAnon:
   199       str_alloc_text(&p_sess->user_str, tunable_ftp_username);
   200       common_do_login(p_sess, &p_sess->user_str, 1, 1);
   201       break;
   202     case kVSFLoginReal:
   203       {
   204         int do_chroot = 0;
   205         if (tunable_chroot_local_user)
   206         {
   207           do_chroot = 1;
   208         }
   209         if (tunable_chroot_list_enable)
   210         {
   211           struct mystr chroot_list_file = INIT_MYSTR;
   212           int retval = str_fileread(&chroot_list_file,
   213                                     tunable_chroot_list_file,
   214                                     VSFTP_CONF_FILE_MAX);
   215           if (vsf_sysutil_retval_is_error(retval))
   216           {
   217             die2("could not open chroot() list file:",
   218                  tunable_chroot_list_file);
   219           }
   220           if (str_contains_line(&chroot_list_file, &p_sess->user_str))
   221           {
   222             if (do_chroot)
   223             {
   224               do_chroot = 0;
   225             }
   226             else
   227             {
   228               do_chroot = 1;
   229             }
   230           }
   231           str_free(&chroot_list_file);
   232         }
   233         common_do_login(p_sess, &p_sess->user_str, do_chroot, 0);
   234       }
   235       break;
   236     default:
   237       bug("weird state in process_login_request");
   238       break;
   239   }
   240   /* NOTREACHED */
   241 }

function

   171 static void
   172 process_login_req(struct vsf_session* p_sess)
   173 {
   174   enum EVSFPrivopLoginResult e_login_result = kVSFLoginNull;
   175   char cmd;
   176   vsf_sysutil_unblock_sig(kVSFSysUtilSigCHLD);
   177   /* Blocks */
   178   cmd = priv_sock_get_cmd(p_sess);
   179   vsf_sysutil_block_sig(kVSFSysUtilSigCHLD);
   180   if (cmd != PRIV_SOCK_LOGIN)
   181   {
   182     die("bad request");
   183   }
   184   /* Get username and password - we must distrust these */
   185   {
   186     struct mystr password_str = INIT_MYSTR;
   187     priv_sock_get_str(p_sess, &p_sess->user_str);
   188     priv_sock_get_str(p_sess, &password_str);
   189     e_login_result = vsf_privop_do_login(p_sess, &password_str);
   190     str_free(&password_str);
   191   }
   192   switch (e_login_result)
   193   {
   194     case kVSFLoginFail:
   195       priv_sock_send_result(p_sess, PRIV_SOCK_RESULT_BAD);
   196       return;
   197       break;
   198     case kVSFLoginAnon:
   199       str_alloc_text(&p_sess->user_str, tunable_ftp_username);
   200       common_do_login(p_sess, &p_sess->user_str, 1, 1);
   201       break;
   202     case kVSFLoginReal:
   203       {
   204         int do_chroot = 0;
   205         if (tunable_chroot_local_user)
   206         {
   207           do_chroot = 1;
   208         }
   209         if (tunable_chroot_list_enable)
   210         {
   211           struct mystr chroot_list_file = INIT_MYSTR;
   212           int retval = str_fileread(&chroot_list_file,
   213                                     tunable_chroot_list_file,
   214                                     VSFTP_CONF_FILE_MAX);
   215           if (vsf_sysutil_retval_is_error(retval))
   216           {
   217             die2("could not open chroot() list file:",
   218                  tunable_chroot_list_file);
   219           }
   220           if (str_contains_line(&chroot_list_file, &p_sess->user_str))
   221           {
   222             if (do_chroot)
   223             {
   224               do_chroot = 0;
   225             }
   226             else
   227             {
   228               do_chroot = 1;
   229             }
   230           }
   231           str_free(&chroot_list_file);
   232         }
   233         common_do_login(p_sess, &p_sess->user_str, do_chroot, 0);
   234       }
   235       break;
   236     default:
   237       bug("weird state in process_login_request");
   238       break;
   239   }
   240   /* NOTREACHED */
   241 }