{"id":18102,"date":"2025-04-19T00:32:48","date_gmt":"2025-04-18T16:32:48","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/18102.html"},"modified":"2025-04-19T00:32:48","modified_gmt":"2025-04-18T16:32:48","slug":"02-07-tcp%e6%9c%8d%e5%8a%a1%e5%99%a8%e4%b8%8e%e5%ae%a2%e6%88%b7%e7%ab%af%e7%9a%84%e6%90%ad%e5%bb%ba","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/18102.html","title":{"rendered":"02.07 TCP\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u7684\u642d\u5efa"},"content":{"rendered":"

\u4e00.\u601d\u7ef4\u5bfc\u56fe\"\"<\/h2>\n

\u4e8c.\u4f7f\u7528\u52a8\u6001\u534f\u8bae\u5305\u5b9e\u73b0\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef<\/h2>\n

1. \u534f\u8bae\u5305\u7684\u7ed3\u6784\u5b9a\u4e49<\/h3>\n

\u9996\u5148，\u662f\u534f\u8bae\u5305\u7684\u7ed3\u6784\u5b9a\u4e49\u3002\u5728\u4e24\u6bb5\u4ee3\u7801\u4e2d，pack_t\u7ed3\u6784\u4f53\u90fd\u88ab\u7528\u6765\u8868\u793a\u534f\u8bae\u5305：<\/p>\n

typedef struct Pack {
\n int size; \/\/ \u8bb0\u5f55\u6574\u4e2a\u534f\u8bae\u5305\u7684\u5b9e\u9645\u5927\u5c0f
\n enum Type type; \/\/ \u534f\u8bae\u5305\u7684\u7c7b\u578b
\n char buf[2048]; \/\/ \u5b58\u50a8\u5b9e\u9645\u6570\u636e
\n int count; \/\/ \u8bb0\u5f55buf\u4e2d\u5df2\u4f7f\u7528\u7684\u5b57\u8282\u6570
\n} pack_t; <\/p>\n

enum Type\u5b9a\u4e49\u4e86\u534f\u8bae\u5305\u7684\u7c7b\u578b，\u4f8b\u5982TYPE_REGIST\u548cTYPE_LOGIN，\u5206\u522b\u8868\u793a\u6ce8\u518c\u548c\u767b\u5f55\u64cd\u4f5c\u3002<\/p>\n

2. \u670d\u52a1\u5668\u7aef\u7684\u534f\u8bae\u5305\u89e3\u6790<\/h3>\n

\u5728\u670d\u52a1\u5668\u7aef\u4ee3\u7801\u4e2d，read_pack\u51fd\u6570\u8d1f\u8d23\u89e3\u6790\u4ece\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u7684\u534f\u8bae\u5305\u3002\u8be5\u51fd\u6570\u7684\u4e3b\u8981\u6b65\u9aa4\u5982\u4e0b：<\/p>\n

  • \n

    \u8bfb\u53d6\u6570\u636e\u5927\u5c0f：\u4ecebuf\u4e2d\u8bfb\u53d6\u524d2\u4e2a\u5b57\u8282，\u8868\u793a\u63a5\u4e0b\u6765\u8981\u8bfb\u53d6\u7684\u6570\u636e\u5927\u5c0f\u3002<\/p>\n<\/li>\n

  • \n

    \u8bfb\u53d6\u6570\u636e：\u6839\u636e\u8bfb\u53d6\u5230\u7684\u6570\u636e\u5927\u5c0f，\u4ecebuf\u4e2d\u8bfb\u53d6\u76f8\u5e94\u957f\u5ea6\u7684\u6570\u636e\u3002<\/p>\n<\/li>\n

  • \n

    \u5904\u7406\u6570\u636e：\u5c06\u8bfb\u53d6\u5230\u7684\u6570\u636e\u6253\u5370\u51fa\u6765\u3002<\/p>\n

    void read_pack(pack_t* pack) {
    \n char *buf = pack->buf;
    \n int readed_size = 0;
    \n while(1) {
    \n short data_size = *(short*)(buf + readed_size);
    \n if(data_size == 0) {
    \n printf("\u6570\u636e\u89e3\u6790\u5b8c\u6bd5\\\\n");
    \n break;
    \n }
    \n readed_size += 2;
    \n char temp[data_size + 1];
    \n memset(temp, 0, data_size + 1);
    \n memcpy(temp, buf + readed_size, data_size);
    \n readed_size += data_size;
    \n printf("temp = %s\\\\n", temp);
    \n }
    \n} <\/p>\n

    3. \u5ba2\u6237\u7aef\u7684\u534f\u8bae\u5305\u6784\u5efa<\/h3>\n

    \u5728\u5ba2\u6237\u7aef\u4ee3\u7801\u4e2d，append\u51fd\u6570\u8d1f\u8d23\u5c06\u6570\u636e\u6309\u7167\u534f\u8bae\u683c\u5f0f\u6dfb\u52a0\u5230pack_t\u7ed3\u6784\u4f53\u4e2d\u3002\u8be5\u51fd\u6570\u7684\u4e3b\u8981\u6b65\u9aa4\u5982\u4e0b：<\/p>\n<\/li>\n

  • \n

    \u8bb0\u5f55\u6570\u636e\u957f\u5ea6：\u5c06\u6570\u636e\u7684\u957f\u5ea6\u5b58\u50a8\u5728buf\u7684\u524d2\u4e2a\u5b57\u8282\u4e2d\u3002<\/p>\n<\/li>\n

  • \n

    \u5b58\u50a8\u6570\u636e：\u5c06\u6570\u636e\u672c\u8eab\u5b58\u50a8\u5728buf\u4e2d\u3002<\/p>\n<\/li>\n

  • \n

    \u66f4\u65b0\u534f\u8bae\u5305\u5927\u5c0f：\u66f4\u65b0pack_t\u7ed3\u6784\u4f53\u4e2d\u7684size\u548ccount\u5b57\u6bb5\u3002<\/p>\n

    void append(pack_t* pack, const char* data) {
    \n char* buf = pack->buf;
    \n int len = strlen(data);
    \n *(short*)(buf + pack->count) = len;
    \n pack->count += 2;
    \n memcpy(buf + pack->count, data, len);
    \n pack->count += len;
    \n pack->size = pack->count + 8;
    \n} <\/p>\n

    4. \u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u7684\u4ea4\u4e92<\/h3>\n

    \u5728\u5ba2\u6237\u7aef\u4ee3\u7801\u4e2d，\u7528\u6237\u8f93\u5165\u8d26\u53f7\u548c\u5bc6\u7801\u540e，append\u51fd\u6570\u5c06\u6570\u636e\u6dfb\u52a0\u5230\u534f\u8bae\u5305\u4e2d，\u7136\u540e\u901a\u8fc7write\u51fd\u6570\u5c06\u534f\u8bae\u5305\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u3002<\/p>\n

    while(1) {
    \n pack_t pack = {0};
    \n pack.type = TYPE_LOGIN;
    \n char name[20] = "";
    \n char pswd[20] = "";
    \n printf("\u8bf7\u8f93\u5165\u8d26\u53f7:");
    \n scanf("%19s", name);
    \n while(getchar() != 10);
    \n printf("\u8bf7\u8f93\u5165\u5bc6\u7801:");
    \n scanf("%19s", pswd);
    \n while(getchar() != 10);
    \n append(&pack, name);
    \n append(&pack, pswd);
    \n write(client, &pack, pack.size);
    \n} <\/p>\n

    \u5728\u670d\u52a1\u5668\u7aef，read\u51fd\u6570\u63a5\u6536\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u534f\u8bae\u5305，\u5e76\u8c03\u7528read_pack\u51fd\u6570\u89e3\u6790\u6570\u636e\u3002<\/p>\n

    while(1) {
    \n int pack_size = 0;
    \n read(client, &pack_size, 4);
    \n pack_t pack = {0};
    \n read(client, (char*)&pack + 4, pack_size – 4);
    \n pack.size = pack_size;
    \n read_pack(&pack);
    \n} <\/p>\n

    5. \u603b\u7ed3<\/h3>\n

    \u901a\u8fc7\u8fd9\u4e24\u6bb5\u4ee3\u7801，\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u7f51\u7edc\u534f\u8bae\u5305\u7684\u6784\u5efa\u4e0e\u89e3\u6790\u3002\u670d\u52a1\u5668\u7aef\u8d1f\u8d23\u63a5\u6536\u548c\u89e3\u6790\u534f\u8bae\u5305，\u800c\u5ba2\u6237\u7aef\u5219\u8d1f\u8d23\u6784\u5efa\u548c\u53d1\u9001\u534f\u8bae\u5305\u3002\u8fd9\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d\u975e\u5e38\u5e38\u89c1，\u7406\u89e3\u5176\u539f\u7406\u5bf9\u4e8e\u5f00\u53d1\u7f51\u7edc\u5e94\u7528\u7a0b\u5e8f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/li>\n

    \u00a0 \u00a0 \u00a0 6.\u5b8c\u6574\u4ee3\u7801<\/h3>\n

    1>\u670d\u52a1\u5668<\/h4>\n

    #include <stdio.h>
    \n#include <stdlib.h>
    \n#include <string.h>
    \n#include <sys\/socket.h>
    \n#include <netinet\/in.h>
    \n#include <unistd.h><\/p>\n

    typedef struct sockaddr_in addr_in_t;
    \ntypedef struct sockaddr addr_t;
    \ntypedef struct sockaddr_un addr_un_t;<\/p>\n

    enum Type {
    \n TYPE_REGIST,
    \n TYPE_LOGIN
    \n};<\/p>\n

    typedef struct Pack {
    \n int size;
    \n enum Type type;
    \n char buf[2048];
    \n int count;
    \n} pack_t;<\/p>\n

    void read_pack(pack_t *pack) {
    \n char *buf = pack->buf;
    \n int readed_size = 0;<\/p>\n

    while (1) {
    \n short data_size = *(short *)(buf + readed_size);
    \n if (data_size == 0) {
    \n printf("\u6570\u636e\u89e3\u6790\u5b8c\u6bd5\\\\n");
    \n break;
    \n }
    \n readed_size += 2;
    \n char temp[data_size + 1];
    \n memset(temp, 0, data_size + 1);
    \n memcpy(temp, buf + readed_size, data_size);
    \n readed_size += data_size;
    \n printf("temp = %s\\\\n", temp);
    \n }
    \n}<\/p>\n

    int main(int argc, const char *argv[]) {
    \n if (argc != 2) {
    \n printf("\u8bf7\u8f93\u5165\u7aef\u53e3\u53f7\\\\n");
    \n return 1;
    \n }
    \n int port = atoi(argv[1]);<\/p>\n

    int server = socket(AF_INET, SOCK_STREAM, 0);
    \n addr_in_t addr = {0};
    \n addr.sin_family = AF_INET;
    \n addr.sin_port = htons(port);
    \n addr.sin_addr.s_addr = inet_addr("0.0.0.0");<\/p>\n

    if (bind(server, (addr_t *)&addr, sizeof(addr)) == -1) {
    \n perror("bind");
    \n return 1;
    \n }<\/p>\n

    listen(server, 10);<\/p>\n

    addr_in_t client_addr = {0};
    \n int client_addr_len = sizeof(client_addr);
    \n int client = accept(server, (addr_t *)&client_addr, &client_addr_len);
    \n if (client != -1) {
    \n printf("\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\\\\n");
    \n }<\/p>\n

    while (1) {
    \n int pack_size = 0;
    \n read(client, &pack_size, 4);
    \n pack_t pack = {0};
    \n read(client, (char *)&pack + 4, pack_size – 4);
    \n pack.size = pack_size;
    \n read_pack(&pack);
    \n }<\/p>\n

    return 0;
    \n} <\/p>\n

    2>\u5ba2\u6237\u7aef<\/h4>\n

    #include <stdio.h>
    \n#include <stdlib.h>
    \n#include <string.h>
    \n#include <sys\/socket.h>
    \n#include <netinet\/in.h>
    \n#include <unistd.h><\/p>\n

    typedef struct sockaddr_in addr_in_t;
    \ntypedef struct sockaddr addr_t;
    \ntypedef struct sockaddr_un addr_un_t;<\/p>\n

    enum Type {
    \n TYPE_REGIST,
    \n TYPE_LOGIN
    \n};<\/p>\n

    typedef struct Pack {
    \n int size;
    \n enum Type type;
    \n char buf[2048];
    \n int count;
    \n} pack_t;<\/p>\n

    void append(pack_t *pack, const char *data) {
    \n char *buf = pack->buf;
    \n int len = strlen(data);
    \n *(short *)(buf + pack->count) = len;
    \n memcpy(buf + pack->count + 2, data, len);
    \n pack->count += 2;
    \n pack->count += len;
    \n pack->size = pack->count + 8;
    \n}<\/p>\n

    int main(int argc, const char *argv[]) {
    \n if (argc != 2) {
    \n printf("\u8bf7\u8f93\u5165\u7aef\u53e3\u53f7\\\\n");
    \n return 1;
    \n }
    \n int port = atoi(argv[1]);<\/p>\n

    int client = socket(AF_INET, SOCK_STREAM, 0);
    \n addr_in_t addr = {0};
    \n addr.sin_family = AF_INET;
    \n addr.sin_port = htons(port);
    \n addr.sin_addr.s_addr = inet_addr("192.168.60.77");<\/p>\n

    if (connect(client, (addr_t *)&addr, sizeof(addr)) == -1) {
    \n perror("connect");
    \n return 1;
    \n }<\/p>\n

    while (1) {
    \n pack_t pack = {0};
    \n pack.type = TYPE_LOGIN;
    \n char name[20] = "";
    \n char pswd[20] = "";
    \n printf("\u8bf7\u8f93\u5165\u8d26\u53f7：");
    \n scanf("%19s", name);
    \n while (getchar() != '\\\\n');
    \n printf("\u8bf7\u8f93\u5165\u5bc6\u7801：");
    \n scanf("%19s", pswd);
    \n while (getchar() != '\\\\n');<\/p>\n

    append(&pack, name);
    \n append(&pack, pswd);<\/p>\n

    write(client, &pack, pack.size);
    \n }<\/p>\n

    return 0;
    \n} <\/p>\n

    \u4e09\u3001\u57fa\u4e8e\u4ee5\u4e0a\u4ee3\u7801，\u5c06\u8bfb\u53d6\u5230\u7684\u4e00\u6761\u6761\u4ee3\u7801\u4fdd\u5b58\u5230\u94fe\u8868\u4e2d<\/h2>\n

    1.\u670d\u52a1\u5668\u4ee3\u7801<\/h3>\n

    #include <stdio.h>
    \n#include <string.h>
    \n#include <unistd.h>
    \n#include <stdlib.h>
    \n#include <sys\/types.h>
    \n#include <sys\/stat.h>
    \n#include <fcntl.h>
    \n#include <pthread.h>
    \n#include <semaphore.h>
    \n#include <wait.h>
    \n#include <signal.h>
    \n#include <sys\/socket.h>
    \n#include <arpa\/inet.h>
    \n#include <sys\/socket.h>
    \n#include <sys\/ipc.h>
    \n#include <sys\/sem.h>
    \n#include <semaphore.h>
    \n#include <sys\/msg.h>
    \n#include <sys\/shm.h>
    \n#include <sys\/un.h><\/p>\n

    \/\/ \u5b9a\u4e49\u7f51\u7edc\u5730\u5740\u7ed3\u6784\u4f53\u7c7b\u578b
    \ntypedef struct sockaddr_in addr_in_t;
    \ntypedef struct sockaddr addr_t;
    \ntypedef struct sockaddr_un addr_un_t;<\/p>\n

    \/\/ \u5b9a\u4e49\u534f\u8bae\u5305\u7c7b\u578b\u679a\u4e3e
    \nenum Type {
    \nTYPE_REGIST, \/\/ \u6ce8\u518c\u7c7b\u578b
    \nTYPE_LOGIN \/\/ \u767b\u5f55\u7c7b\u578b
    \n};<\/p>\n

    \/\/ \u5b9a\u4e49\u534f\u8bae\u5305\u7ed3\u6784\u4f53
    \ntypedef struct Pack {
    \nint size; \/\/ \u534f\u8bae\u5305\u7684\u603b\u5927\u5c0f
    \nenum Type type; \/\/ \u534f\u8bae\u5305\u7684\u7c7b\u578b
    \nchar buf[2048]; \/\/ \u6570\u636e\u7f13\u51b2\u533a
    \nint count; \/\/ \u8bb0\u5f55\u7f13\u51b2\u533a\u4e2d\u5df2\u4f7f\u7528\u7684\u5b57\u8282\u6570
    \n} pack_t;<\/p>\n

    \/\/ \u5b9a\u4e49\u94fe\u8868\u8282\u70b9\u7ed3\u6784\u4f53
    \ntypedef struct Node {
    \nchar* data;
    \nstruct Node* next;
    \n} Node;<\/p>\n

    \/\/ \u521b\u5efa\u65b0\u8282\u70b9
    \nNode* create_node(const char* data) {
    \nNode* node = (Node*)malloc(sizeof(Node));
    \n if (data != NULL) {
    \n size_t len = strlen(data) + 1;
    \n node->data = (char*)malloc(len * sizeof(char));
    \n if (node->data != NULL) {
    \n strcpy(node->data, data);
    \n } else {
    \n fprintf(stderr, "\u5185\u5b58\u5206\u914d\u5931\u8d25！\\\\n");
    \n exit(EXIT_FAILURE);
    \n }
    \n} else {
    \n \/\/ \u5904\u7406\u8f93\u5165\u4e3a NULL \u7684\u60c5\u51b5
    \n node->data = NULL;
    \n}
    \nnode->next = NULL;
    \nreturn node;
    \n}<\/p>\n

    \/\/ \u5c06\u6570\u636e\u6dfb\u52a0\u5230\u94fe\u8868
    \nvoid append_to_list(Node** head, const char* data) {
    \nNode* new_node = create_node(data);
    \nif (*head == NULL) {
    \n*head = new_node;
    \n} else {
    \nNode* current = *head;
    \nwhile (current->next != NULL) {
    \ncurrent = current->next;
    \n}
    \ncurrent->next = new_node;
    \n}
    \n}<\/p>\n

    \/\/ \u91ca\u653e\u94fe\u8868\u5185\u5b58
    \nvoid free_list(Node* head) {
    \nNode* current = head;
    \nwhile (current != NULL) {
    \nNode* next = current->next;
    \nfree(current->data);
    \nfree(current);
    \ncurrent = next;
    \n}
    \n}<\/p>\n

    \/\/ \u89e3\u6790\u534f\u8bae\u5305\u5e76\u5c06\u6570\u636e\u4fdd\u5b58\u5230\u94fe\u8868
    \nvoid read_pack(pack_t* pack, Node** head) {
    \nchar *buf = pack->buf;
    \nint readed_size = 0; \/\/ \u8bb0\u5f55\u5df2\u8bfb\u53d6\u7684\u5b57\u8282\u6570
    \nwhile(1) {
    \nshort data_size = *(short*)(buf + readed_size); \/\/ \u8bfb\u53d6\u6570\u636e\u5927\u5c0f
    \nif(data_size == 0) {
    \nprintf("\u6570\u636e\u89e3\u6790\u5b8c\u6bd5\\\\n");
    \nbreak;
    \n}
    \nreaded_size += 2;
    \nchar temp[data_size + 1];
    \nmemset(temp, 0, data_size + 1);
    \nmemcpy(temp, buf + readed_size, data_size);
    \nreaded_size += data_size; \/\/ \u66f4\u65b0\u5df2\u8bfb\u53d6\u7684\u5b57\u8282\u6570
    \nprintf("temp = %s\\\\n", temp);
    \nappend_to_list(head, temp); \/\/ \u5c06\u6570\u636e\u6dfb\u52a0\u5230\u94fe\u8868
    \n}
    \n}<\/p>\n

    \/\/ \u4e3b\u51fd\u6570
    \nint main(int argc, const char *argv[])
    \n{
    \nif(argc != 2)
    \n{
    \nprintf("\u8bf7\u8f93\u5165\u7aef\u53e3\u53f7\\\\n");
    \nreturn 1;
    \n}
    \nint port = atoi(argv[1]); \/\/ \u5c06\u7aef\u53e3\u53f7\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6574\u6570<\/p>\n

    \/\/ \u521b\u5efa\u670d\u52a1\u5668\u5957\u63a5\u5b57
    \nint server = socket(AF_INET, SOCK_STREAM, 0);
    \naddr_in_t addr = {0};
    \naddr.sin_family = AF_INET;
    \naddr.sin_port = htons(port);
    \naddr.sin_addr.s_addr = inet_addr("0.0.0.0"); <\/p>\n

    \/\/ \u7ed1\u5b9a\u5957\u63a5\u5b57\u5230\u5730\u5740
    \nif(bind(server, (struct sockaddr*)&addr, sizeof(addr)) == -1)
    \n{
    \nperror("bind"); \/\/ \u7ed1\u5b9a\u5931\u8d25
    \nreturn 1;
    \n}<\/p>\n

    \/\/ \u76d1\u542c\u8fde\u63a5
    \nlisten(server, 10);<\/p>\n

    \/\/ \u63a5\u53d7\u5ba2\u6237\u7aef\u8fde\u63a5
    \naddr_in_t client_addr = {0};
    \nint client_addr_len = sizeof(client_addr);
    \nint client = accept(server, (struct sockaddr*)&client_addr, &client_addr_len);
    \nif(client != -1)
    \n{
    \nprintf("\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\\\\n");
    \n}<\/p>\n

    Node* head = NULL; \/\/ \u521d\u59cb\u5316\u94fe\u8868\u5934<\/p>\n

    while(1) {
    \nint pack_size = 0;
    \nint ret = read(client, &pack_size, 4); \/\/ \u8bfb\u53d6\u534f\u8bae\u5305\u5927\u5c0f
    \nif (ret == -1)
    \n{
    \nprintf("\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\\\\n");
    \nbreak; \/\/ \u9000\u51fa\u5faa\u73af
    \n}
    \npack_t pack = {0};<\/p>\n

    ret = read(client, (char*)&pack + 4, pack_size – 4); \/\/ \u8bfb\u53d6\u534f\u8bae\u5305\u6570\u636e
    \nif (ret == -1) {
    \nprintf("\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\\\\n"); \/\/ \u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5
    \nbreak; \/\/ \u9000\u51fa\u5faa\u73af
    \n}
    \npack.size = pack_size; \/\/ \u8bbe\u7f6e\u534f\u8bae\u5305\u5927\u5c0f<\/p>\n

    read_pack(&pack, &head); \/\/ \u89e3\u6790\u534f\u8bae\u5305\u5e76\u4fdd\u5b58\u6570\u636e\u5230\u94fe\u8868<\/p>\n

    \/\/ \u6253\u5370\u94fe\u8868\u4e2d\u7684\u6570\u636e
    \nNode* current = head;
    \nprintf("——–\u4fdd\u5b58\u7684\u6570\u636e\u5982\u4e0b——–\\\\n");
    \nwhile (current != NULL) {
    \nprintf("\u94fe\u8868\u6570\u636e: %s\\\\n", current->data);
    \ncurrent = current->next;
    \n}
    \nprintf("\\\\n");
    \n}<\/p>\n

    free_list(head); \/\/ \u91ca\u653e\u94fe\u8868\u5185\u5b58
    \nreturn 0;
    \n} <\/p>\n

    2.\u5ba2\u6237\u7aef\u4ee3\u7801<\/h3>\n

    #include <stdio.h>
    \n#include <string.h>
    \n#include <unistd.h>
    \n#include <stdlib.h>
    \n#include <sys\/types.h>
    \n#include <sys\/stat.h>
    \n#include <fcntl.h>
    \n#include <pthread.h>
    \n#include <semaphore.h>
    \n#include <wait.h>
    \n#include <signal.h>
    \n#include <sys\/socket.h>
    \n#include <arpa\/inet.h>
    \n#include <sys\/socket.h>
    \n#include <sys\/ipc.h>
    \n#include <sys\/sem.h>
    \n#include <semaphore.h>
    \n#include <sys\/msg.h>
    \n#include <sys\/shm.h>
    \n#include <sys\/un.h><\/p>\n

    typedef struct sockaddr_in addr_in_t;
    \ntypedef struct sockaddr addr_t;
    \ntypedef struct sockaddr_un addr_un_t; <\/p>\n

    \/\/ \u5b9a\u4e49\u6d88\u606f\u7c7b\u578b\u679a\u4e3e
    \nenum Type{
    \n TYPE_REGIST, \/\/ \u6ce8\u518c\u7c7b\u578b
    \n TYPE_LOGIN \/\/ \u767b\u5f55\u7c7b\u578b
    \n};<\/p>\n

    \/\/ \u81ea\u5b9a\u4e49\u6570\u636e\u5305\u7ed3\u6784\u4f53
    \ntypedef struct Pack
    \n{
    \n int size;
    \n enum Type type;
    \n char buf[2048];
    \n int count;
    \n}pack_t;<\/p>\n

    void append(pack_t* pack, const char* data)
    \n{
    \n char *buf = pack->buf;
    \n int len = strlen(data);<\/p>\n

    *(short*)(buf + pack->count) = len;
    \n pack->count += 2; <\/p>\n

    memcpy(buf + pack->count, data, len);
    \n pack->count += len;
    \n \/\/ \u66f4\u65b0\u6570\u636e\u5305\u603b\u5927\u5c0f（\u5934\u90e88\u5b57\u8282 + \u6570\u636e\u957f\u5ea6）
    \n pack->size = pack->count + 8;
    \n}<\/p>\n

    int main(int argc, const char *argv[])
    \n{
    \n if(argc != 2)
    \n {
    \n printf("Usage: %s <port>\\\\n", argv[0]);
    \n return 1;
    \n }<\/p>\n

    int port = atoi(argv[1]); \/\/ \u5c06\u7aef\u53e3\u53c2\u6570\u8f6c\u4e3a\u6574\u6570<\/p>\n

    \/\/ \u521b\u5efaTCP\u5957\u63a5\u5b57
    \n int client = socket(AF_INET, SOCK_STREAM, 0);
    \n if(client == -1){
    \n perror("socket creation failed");
    \n return 1;
    \n }<\/p>\n

    \/\/ \u914d\u7f6e\u670d\u52a1\u5668\u5730\u5740\u4fe1\u606f
    \n addr_in_t addr = {0};
    \n addr.sin_family = AF_INET;
    \n addr.sin_port = htons(port);
    \n addr.sin_addr.s_addr = inet_addr("192.168.126.233");<\/p>\n

    \/\/ \u8fde\u63a5\u670d\u52a1\u5668
    \n if(connect(client, (addr_t*)&addr, sizeof(addr)) == -1)
    \n {
    \n perror("connect failed");
    \n return 1;
    \n }<\/p>\n

    while(1)
    \n {
    \n pack_t pack = {0};
    \n pack.type = TYPE_LOGIN; <\/p>\n

    char name[20] = "";
    \n char pswd[20] = "";<\/p>\n

    \/\/ \u83b7\u53d6\u7528\u6237\u540d\u8f93\u5165
    \n printf("\u8bf7\u8f93\u5165\u8d26\u53f7:");
    \n scanf("%19s", name);
    \n while(getchar() != '\\\\n'); \/\/ \u6e05\u7a7a\u8f93\u5165\u7f13\u51b2\u533a<\/p>\n

    \/\/ \u83b7\u53d6\u5bc6\u7801\u8f93\u5165
    \n printf("\u8bf7\u8f93\u5165\u5bc6\u7801:");
    \n scanf("%19s", pswd);
    \n while(getchar() != '\\\\n'); \/\/ \u6e05\u7a7a\u8f93\u5165\u7f13\u51b2\u533a<\/p>\n

    \/\/ \u5c06\u7528\u6237\u540d\u548c\u5bc6\u7801\u6253\u5305\u5230\u6570\u636e\u5305
    \n append(&pack, name);
    \n append(&pack, pswd);<\/p>\n

    \/\/ \u53d1\u9001\u6574\u4e2a\u6570\u636e\u5305（\u53d1\u9001\u5927\u5c0f\u4e3a\u8ba1\u7b97\u540e\u7684\u603b\u5927\u5c0f）
    \n write(client, &pack, pack.size);
    \n }<\/p>\n

    return 0;
    \n} <\/p>\n","protected":false},"excerpt":{"rendered":"

    \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.7k\u6b21\uff0c\u70b9\u8d5e46\u6b21\uff0c\u6536\u85cf20\u6b21\u3002\u901a\u8fc7\u8fd9\u4e24\u6bb5\u4ee3\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u7f51\u7edc\u534f\u8bae\u5305\u7684\u6784\u5efa\u4e0e\u89e3\u6790\u3002\u670d\u52a1\u5668\u7aef\u8d1f\u8d23\u63a5\u6536\u548c\u89e3\u6790\u534f\u8bae\u5305\uff0c\u800c\u5ba2\u6237\u7aef\u5219\u8d1f\u8d23\u6784\u5efa\u548c\u53d1\u9001\u534f\u8bae\u5305\u3002\u8fd9\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d\u975e\u5e38\u5e38\u89c1\uff0c\u7406\u89e3\u5176\u539f\u7406\u5bf9\u4e8e\u5f00\u53d1\u7f51\u7edc\u5e94\u7528\u7a0b\u5e8f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n","protected":false},"author":2,"featured_media":18101,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[43,44],"topic":[],"class_list":["post-18102","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-43","tag-44"],"yoast_head":"\n02.07 TCP\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u7684\u642d\u5efa - 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