tos rtd

remove the annotator at the beginning of the following statement, // Ob. c = 100; // Error! You cannot compile this program because of violation. To understand the application of access control in practice, let's look at the improved version of the Stack class shown at the end of Chapter 6th. // This class defines an integer stack that can hold 10 values. Class Stack { /* Now, both stck and tos are private. This means that they cannot be accident

it is assumed as "+", all arbitrary interfaces will be matched. [!] -F, -- Fragment[!] -F -- multipartThis means that in the fragmented package, the rule only asks for the second and later parts. Since then, this cannot be determined Packet source port or target port (or ICMP type), which cannot match any specified Matching rules. If "! "The description is used before the"-F "sign to indicate the opposite. Other optionsOther optionsYou can also specify the following additional options: -V -- ve

Javax.mail.internet.MimeMultipart; /*** Send mail to multiple recipients, CC mail*/public class Multimailsender { /*** Send mail in text format* @param mailinfo messages to be sent*/public boolean sendtextmail (Multimailsenderinfo mailinfo) {To determine whether an identity certificate is requiredMyauthenticator authenticator = null;Properties Pro = Mailinfo.getproperties ();if (Mailinfo.isvalidate ()) {If authentication is required, create a password validatorAuthenticator = new Myauthenticato

"); StartActivity (data); Set the parameters for the message by Putextra to the intent. 2. Send by using send [Java] Copy Code code as follows: Intent Intent = new Intent (intent.action_send); String[] tos = {"Way.ping.li@gmail.com"}; String[] CCS = {"Way.ping.li@gmail.com"}; String[] BCCs = {"Way.ping.li@gmail.com"}; Intent.putextra (Intent.extra_email, TOS); Intent.putextra

Strategic routing The strategy is that the routing of IP packets is based on some of the policies that the network administrator has set up according to the needs. For example, we can have this strategy: "All come straight from the net a package, select the x path, the other choice y path", or "all TOS for a package selection path F; Other selector path K". Cisco's network operating system (Cisco IOS) has been using a new strategic routing mechanism s

OPTIONSOther optionsYou can also specify the following additional options: -V--verbose-V--detailedVerbose output. This option allows the list command to display interface addresses, rule options (if any), and TOS (Type of Service) masks. The package and byte counters will also be displayed with K, M, G (prefix) representing 1000, 1,000,000, and 1,000,000,000 times (although see the-X flag to change it), for Add, insert, delete, and replace commands,

; mmap memory-mapped device; pd parent directory; rtd root directory; tr kernel trace file (OpenBSD ); txt program text (code and data ); V86 VP/ix mapped file; the File Descriptor number display mode of the file is: reference r for read access; w for write access; u for read and write access; N for a Solaris NFS lock of unknown type; r for read lock on part of the file; R for a read lock on the entire file; w for a write lock on part of the file; W f

How to view the fd opened by a process and the corresponding file or socket operations, fd corresponds /********************************************************************** Author : Samson* Date : 06/22/2015* Test platform:* gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2* GNU bash, 4.3.11(1)-release (x86_64-pc-linux-gnu) * *******************************************************************/ In GNU Linux, the native socket is used to write the server program and client program. According to the general

;117.79.92.146:http (close_wait)Chrome 31615 tiankonguse 155u IPv4 539020 0t0 TCP 192.168.31.137:34901->151.101.16.133:http (established)Chrome 31615 tiankonguse 170u IPv4 539036 0t0 TCP 192.168.31.137:58368->220.181.7.190:http (close_wait)Chrome 31615 tiankonguse 174u IPv4 539021 0t0 TCP 192.168.31.137:34902->151.101.16.133:http (established)Chrome 31615 tiankonguse 183u IPv4 539022 0t0 TCP 192.168.31.137:34903->151.101.16.133:http (established)Chrome 31615 tiankonguse 184u IPv4 539023 0t0 TCP

Because the application opens a list of file descriptors that provide a lot of information about the application itself, the ability to view this list through the Lsof tool can be very helpful for system monitoring and error scheduling. Linux is all files, lsof (lists openfiles) is a tool that lists the current system open files. Files can be: Normal fileDirectoryFiles on the network file systemCharacter or device file(function) Shared libraryPipes, Named PipesSymbolic LinksNetwork files (for

specify the width of the display and, if the parameter followed by +c is zero, display the full name of the command2, PID: The ID number of the process3, PPIDThe IP number of the parent process, which is not displayed by default, can be opened when using the-R parameter.4, PgidThe ID number of the process group, which is not displayed by default, and can be opened when the-G parameter is used.5, USERThe execution uid of the command or the name of the user logged on in the system. The default di

, platform, and Dai: /* Bind dais */For (I = 0; I Soc_bind_dai_link (card, I ); ASOC defines three global linked list header variables: codec_list, dai_list, and platform_list. All codec, Dai, and platform in the system are connected to these three global linked lists during registration. The soc_bind_dai_link function scans these three linked lists one by one, matches them according to the name in card-> dai_link [], and matches the corresponding codec, the Dai and platform instances are assign

file;Mmap memory-mapped device;Pd parent directory;Rtd root directory;Tr kernel trace file (OpenBSD );Txt program text (code and data );V86 VP/ix mapped file; File Descriptor number Display Mode: ReferenceR for read access;W for write access;U for read and write access;N for a Solaris NFS lock of unknown type;R for read lock on part of the file;R for a read lock on the entire file;W for a write lock on part of the file;W for a write lock on the entir

(type name format)Indicates how variable-length type fields are interpreted, and the valid values are described in table 1 below?Variable length typeDescribe the type of record, and if you use Tnf_well_known, use this field to specify the type definition (RTD) for the record? The valid RTD values are defined in table 2 below?Variable length IDUniquely identify the record? This field is not used frequently,

: process ID 3. PPID parent process IP address, it is not displayed by default. It can be opened when the-R parameter is used. 4. ID of the PGID process group, which is not displayed by default. It can be opened when the-g parameter is used. 5. The UID for executing the USER command or the name of the USER logged in to the system. The user name is displayed by default. When the-l parameter is used, the UID is displayed. 6. FD is the File Descriptor number of the File, or the following content: (

/********************************************************************* * Author:samson * date:06/22/2015 * Test PL Atform: * GCC (Ubuntu 4.8.2-19ubuntu1) 4.8.2 * GNU bash, 4.3.11 (1)-release (X86_64-PC-LINUX-GNU) * *******************************************************************/Under GNU Linux, using native sockets to write the server terminal program and client program, according to the general, the server program will first create a socket and listen to this port, and the client program i

TCP/IP routing cache mechanism, stream identity mechanism, tcp identity0x01 reason The previous chapter has learned the network layer (ip layer). The key part is to find the next hop route. This study focuses on the knowledge about routing.0x02 related structure 1. Routing cache mechanism: Struct rtable {union {struct dst_entry dst; // destination entry} u; struct flowi fl; // contains the actual hash key, which stores the hash value for finding the route node, the hash value is determined by SR

, Fn_hash) {if (F->fn_key! = k) Continue;err = Fib_semantic_match (f->fn_alias, FLP, Res, F->fn_key, Fz->fz_mask, Fz->fz_order); Err Fib_node structure represents a subnet, where the same subnet mask subnet to hash the algorithm is relatively simple, here do not say, when the target host matching subnet, that is Fib_node->fn_key = = DST mask, as if the goal is to achieve, has found a representative of the target subnet of the route entry, take out the next and the network card exit, you can be

| flush } [ dev STRING ] [ scope SCOPE-ID ] [ to PREFIX ] [ FLAG-LIST ] [ label PATTERN ]IFADDR := PREFIX | ADDR peer PREFIX [ broadcast ADDR ] [ anycast ADDR ] [ label STRING ] [ scope SCOPE-ID ]SCOPE-ID := [ host | link | global | NUMBER ]FLAG-LIST := [ FLAG-LIST ] FLAGFLAG := [ permanent | dynamic | secondary | primary | tentative | deprecated ]Addrlabel formatip addrlabel { add | del } prefix PREFIX [ dev DEV ] [ label NUMBER ]ip addrlabel { list | flush }Route formatIP route {list | flush}

NotificationThe differentiated Services and ECN fields in IP.+-----+-----+| ECN FIELD |+-----+-----+ECT CE [Obsolete] RFC 2481 names for the ECN bits.0 0 Not-ect0 1 ECT (1)1 0 ECT (0)1 1 CEThe ECN Field in IP.The 7th and 8bit res fields in the TOS field of the IP header are redefined as ECN fields, which have four values, described in RFC3168, 00 means that the message does not support ECN, so the router will handle the message in accordance with the