{"id":23,"date":"2024-07-22T23:36:42","date_gmt":"2024-07-22T15:36:42","guid":{"rendered":"https:\/\/129.146.9.168\/?p=23"},"modified":"2024-11-01T09:48:25","modified_gmt":"2024-11-01T01:48:25","slug":"1722422189","status":"publish","type":"post","link":"https:\/\/www.zhzxs.site\/index.php\/2024\/07\/22\/1722422189\/","title":{"rendered":"sokcet c++ \u7f51\u7edc\u7f16\u7a0b\u7684\u57fa\u672c\u4f7f\u7528"},"content":{"rendered":"\n

\u200b<\/p>\n\n\n\n

\u672c\u6559\u7a0b\u4e3b\u8981\u8bb2\u8ff0\u7684\u662fc++\u7f51\u7edc\u7f16\u7a0b\uff0c\u9700\u8981\u4e00\u5b9a\u7684c++\u57fa\u7840\u548c\u8ba1\u7b97\u673a\u7f51\u7edc\u57fa\u7840\u4ee5\u53ca\u64cd\u4f5c\u7cfb\u7edf\u57fa\u7840\uff0c\u8bdd\u4e0d\u591a\u8bf4\uff0c\u76f4\u63a5\u5f00\u59cb\u6559\u7a0b<\/h1>\n\n\n\n

\u9996\u5148\u8fd8\u662f\u6765\u4ecb\u7ecd\u4e00\u4e9b\u540d\u8bcd<\/h3>\n\n\n\n
\n

socket<\/strong>: \u901a\u9053\uff0c\u8fd0\u884c\u5728\u8ba1\u7b97\u673a\u7684\u4e24\u4e2a\u7a0b\u5e8f\u901a\u8fc7socket\u5efa\u7acb\u8d77\u4e00\u4e2a\u901a\u9053,\u6570\u636e\u5728\u901a\u9053\u4e2d\u4f20\u8f93
socket\u7684\u5206\u7c7b<\/strong>: socket\u63d0\u4f9b\u4e86\u6d41(stream) \u548c \u6570\u636e\u8868(datagram)\u4e24\u79cd\u901a\u4fe1\u673a\u5236\uff0cstream\u91c7\u7528tcp\uff0cdatagram\u91c7\u7528udp\u534f\u8bae\u3002\u81f3\u4e8e\u8fd9\u4e24\u79cd\u534f\u8bae\u6709\u4ec0\u4e48\u533a\u522b\u5c31\u4e0d\u4ecb\u7ecd\u4e86\uff0c\u4f46\u51e1\u5b66\u8fc7\u8ba1\u7f51\u7684\u5e94\u8be5\u90fd\u61c2\u5427
memset\u51fd\u6570<\/strong>:\u7ed9\u6570\u7ec4\u6216\u7ed3\u6784\u56fe\u521d\u59cb\u5316\u51fd\u6570\uff0c\u9700\u5305\u542b\u5934\u6587\u4ef6<cstring> memset(a,0,sizeiof(a)) \u53c2\u6570\u5206\u522b\u4e3a\u6307\u5411\u6570\u7ec4\u7684\u6307\u9488,\u521d\u59cb\u5316\u7684\u503c\uff0c\u5927\u5c0f
socket\u51fd\u6570<\/strong>: \u521b\u5efa\u901a\u9053\u7684\u51fd\u6570\uff0c\u9700\u5305\u542b\u5934\u6587\u4ef6<sys\/socket.h>\uff0c\u51fd\u6570\u539f\u578b:int socket(int af, int type, int protocol); \u53c2\u6570:af \u4e3a\u5730\u5740\u65cf\uff08Address Family\uff09\uff0c\u4e5f\u5c31\u662f IP \u5730\u5740\u7c7b\u578b\uff0c\u5e38\u7528\u7684\u6709 AF_INET \u548c AF_INET6\u3002 type \u4e3a\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\/\u5957\u63a5\u5b57\u7c7b\u578b\uff0c\u5e38\u7528\u7684\u6709 SOCK_STREAM\uff08\u6d41\u683c\u5f0f\u5957\u63a5\u5b57\/\u9762\u5411\u8fde\u63a5\u7684\u5957\u63a5\u5b57\uff09 \u548c SOCK_DGRAM\uff08\u6570\u636e\u62a5\u5957\u63a5\u5b57\/\u65e0\u8fde\u63a5\u7684\u5957\u63a5\u5b57\uff09protocol \u8868\u793a\u4f20\u8f93\u534f\u8bae\uff0c\u5e38\u7528\u7684\u6709 IPPROTO_TCP \u548c IPPTOTO_UDP\uff0c\u5206\u522b\u8868\u793a TCP \u4f20\u8f93\u534f\u8bae\u548c UDP \u4f20\u8f93\u534f\u8bae\u3002\u8fd4\u56de\u503c\u4e3a 0 1 -1\uff0c0\u548c1\u90fd\u662f\u6709\u6548\u7684\uff0c0\u4ee3\u8868\u6807\u51c6\u8f93\u5165\uff0c1\u4ee3\u8868\u6807\u51c6\u8f93\u51fa\uff0c-1\u4ee3\u8868\u521b\u5efa\u5931\u8d25
\u4e3b\u673a\u5b57\u8282\u5e8f\u548c\u7f51\u7edc\u5b57\u8282\u7cfb<\/strong>:\u5b57\u8282\u5e8f\u662f\u6307\u5360\u5185\u5b58\u591a\u4e8e\u4e00\u4e2a\u5b57\u8282\u7c7b\u578b\u7684\u6570\u636e\u5728\u5185\u5b58\u4e2d\u7684\u5b58\u653e\u987a\u5e8f\uff0c\u4e00\u4e2a32\u4f4d\u6574\u6570\u75314\u4e2a\u5b57\u8282\u7ec4\u6210\u3002\u5728\u5185\u5b58\u4e2d\u7531\u4e24\u79cd\u5b58\u50a8\u65b9\u6cd5:\u4e00\u79cd\u662f\u5c06\u4f4e\u5b57\u8282\u5e8f\u5b58\u50a8\u5728\u8d77\u59cb\u5730\u5740\uff0c\u79f0\u4e3a\u5c0f\u7aef\u5b58\u50a8\u3002\u53e6\u5916\u4e00\u79cd\u5219\u662f\u5c06\u9ad8\u5b57\u8282\u5e8f\u5b58\u50a8\u5728\u8d77\u59cb\u5730\u5740\uff0c\u79f0\u4e3a\u5927\u7aef\u5b58\u50a8\u3002\u5217\u5982 0x12345678<\/em> \u8fd9\u4e2a\u6570\u636e\u5927\u7aef\u5b58\u50a8\u548c\u5c0f\u7aef\u5b58\u50a8\u5206\u522b\u4e3a:
\u5927\u7aef\u5b58\u50a8: 12 34 56 78
\u5c0f\u7aef\u5b58\u50a8\uff1a78 56 34 12
\u7f51\u7edc\u5b57\u8282\u5e8f\u662fTCP\/IP\u4e2d\u89c4\u5b9a\u597d\u7684\u4e00\u79cd\u6570\u636e\u8868\u793a\u683c\u5f0f\u91c7\u7528\u5927\u7aef\u5b58\u50a8\uff0c\u4e3b\u673a\u5b57\u8282\u5e8f\u4e0e\u7f51\u7edc\u5b57\u8282\u5e8f\u4e0d\u540c\uff0c\u5b83\u4e0ecpu\u7684\u8bbe\u7f6e\u6709\u5173\uff0c\u7531\u7684\u662f\u5927\u7aef\u5b58\u50a8\uff0c\u6709\u7684\u662f\u5c0f\u7aef\u5b58\u50a8\u3002\u4e3a\u4e86\u907f\u514d\u5b57\u8282\u5e8f\u4e0d\u4e00\u6837\uff0c\u6211\u4eec\u5728\u901a\u4fe1\u4e2d\u7edf\u4e00\u91c7\u7528\u7f51\u7edc\u5b57\u8282\u5e8f\u3002
\u7f51\u7edc\u5b57\u8282\u5e8f\u548c\u4e3b\u673a\u5b57\u8282\u5e8f\u7684\u8f6c\u6362\u51fd\u6570:htosn(),ntohs(),htonl(),ntohl()\u3002htons\u548cntohs\u5b8c\u621016\u4f4d\u65e0\u7b26\u53f7\u6570\u7684\u76f8\u4e92\u8f6c\u5316\uff0c\u53e6\u5916\u4e24\u4e2a\u5b8c\u6210\u7684\u662f32\u4f4d\u65e0\u7b26\u53f7\u6570\u7684\u8f6c\u6362<\/p>\n<\/blockquote>\n\n\n\n

1:\u63a5\u4e0b\u6765\u662f\u670d\u52a1\u7aef\u7684\u5de5\u4f5c\u6d41\u7a0b:<\/h4>\n\n\n\n
1.\u521b\u5efa\u670d\u52a1\u7aef\u7684socket\u3002\n2.\u628a\u670d\u52a1\u7aef\u7528\u4e8e\u901a\u4fe1\u7684\u5730\u5740\u548c\u7aef\u53e3\u7ed1\u5b9a\u5230socket\u4e0a\u3002\n3.\u628asocket\u8bbe\u7f6e\u4e3a\u76d1\u542c\u6a21\u5f0f\u3002\n4.\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u3002\n5.\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\uff0c\u63a5\u6536\u5ba2\u6237\u7aef\u53d1\u8fc7\u6765\u7684\u62a5\u6587\u540e\uff0c\u56de\u590d\u5904\u7406\u7ed3\u679c\u3002\n6.\u4e0d\u65ad\u7684\u91cd\u590d\u7b2c5\u6b65\uff0c\u76f4\u5230\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\u3002\n7.\u5173\u95edsocket\uff0c\u91ca\u653e\u8d44\u6e90\u3002\n<\/pre>\n\n\n\n
\u670d\u52a1\u7aef\u4ee3\u7801\u5c55\u793aserver.cpp<\/h5>\n\n\n\n
<\/pre>\n\n\n\n
#include <stdio.h>\n#include <string.h>\n#include <unistd.h>\n#include <stdlib.h>\n#include <netdb.h>\n#include <sys\/types.h>\n#include <sys\/socket.h>\n#include <arpa\/inet.h>\n \nint main(int argc,char *argv[])\n{\n  if (argc!=2)\n  {\n    printf(\"please input a port after .\/server\\n\"); return -1;\n  }\n \n  \/\/ \u7b2c1\u6b65\uff1a\u521b\u5efa\u670d\u52a1\u7aef\u7684socket\u3002\n  int listenfd;\n  if ( (listenfd = socket(AF_INET,SOCK_STREAM,0))==-1) { perror(\"socket\"); return -1; }\n \n  \/\/ \u7b2c2\u6b65\uff1a\u628a\u670d\u52a1\u7aef\u7528\u4e8e\u901a\u4fe1\u7684\u5730\u5740\u548c\u7aef\u53e3\u7ed1\u5b9a\u5230socket\u4e0a\u3002\n  struct sockaddr_in servaddr;    \/\/ \u670d\u52a1\u7aef\u5730\u5740\u4fe1\u606f\u7684\u6570\u636e\u7ed3\u6784\u3002\n  memset(&servaddr,0,sizeof(servaddr));\n  servaddr.sin_family = AF_INET;  \/\/ \u534f\u8bae\u65cf\uff0c\u5728socket\u7f16\u7a0b\u4e2d\u53ea\u80fd\u662fAF_INET\u3002\n  servaddr.sin_addr.s_addr = htonl(INADDR_ANY);          \/\/ \u4efb\u610fip\u5730\u5740\u3002\n  \/\/servaddr.sin_addr.s_addr = inet_addr(\"192.168.190.134\"); \/\/ \u6307\u5b9aip\u5730\u5740\u3002\n  servaddr.sin_port = htons(atoi(argv[1]));  \/\/ \u6307\u5b9a\u901a\u4fe1\u7aef\u53e3\u3002\n  if (bind(listenfd,(struct sockaddr *)&servaddr,sizeof(servaddr)) != 0 )\n  { perror(\"bind\"); close(listenfd); return -1; }\n \n  \/\/ \u7b2c3\u6b65\uff1a\u628asocket\u8bbe\u7f6e\u4e3a\u76d1\u542c\u6a21\u5f0f\u3002\n  if (listen(listenfd,5) != 0 ) { perror(\"listen\"); close(listenfd); return -1; }\n \n  \/\/ \u7b2c4\u6b65\uff1a\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u3002\n  int  clientfd;                  \/\/ \u5ba2\u6237\u7aef\u7684socket\u3002\n  int  socklen=sizeof(struct sockaddr_in); \/\/ struct sockaddr_in\u7684\u5927\u5c0f\n  struct sockaddr_in clientaddr;  \/\/ \u5ba2\u6237\u7aef\u7684\u5730\u5740\u4fe1\u606f\u3002\n  clientfd=accept(listenfd,(struct sockaddr *)&clientaddr,(socklen_t*)&socklen);\n  printf(\"\u5ba2\u6237\u7aef\uff08%s\uff09\u5df2\u8fde\u63a5\u3002\\n\",inet_ntoa(clientaddr.sin_addr));\n \n  \/\/ \u7b2c5\u6b65\uff1a\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\uff0c\u63a5\u6536\u5ba2\u6237\u7aef\u53d1\u8fc7\u6765\u7684\u62a5\u6587\u540e\uff0c\u56de\u590dok\u3002\n  char buffer[1024];\n  while (1)\n  {\n    int iret;\n    memset(buffer,0,sizeof(buffer));\n    if ( (iret=recv(clientfd,buffer,sizeof(buffer),0))<=0) \/\/ \u63a5\u6536\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u62a5\u6587\u3002\n    {\n       printf(\"iret=%d\\n\",iret); break;  \n    }\n    printf(\"\u63a5\u6536\uff1a%s\\n\",buffer);\n \n    strcpy(buffer,\"ok\");\n    if ( (iret=send(clientfd,buffer,strlen(buffer),0))<=0) \/\/ \u5411\u5ba2\u6237\u7aef\u53d1\u9001\u54cd\u5e94\u7ed3\u679c\u3002\n    { perror(\"send\"); break; }\n    printf(\"\u53d1\u9001\uff1a%s\\n\",buffer);\n  }\n \n  \/\/ \u7b2c6\u6b65\uff1a\u5173\u95edsocket\uff0c\u91ca\u653e\u8d44\u6e90\u3002\n  close(listenfd); close(clientfd);\n}<\/code><\/pre>\n\n\n\n
2:\u63a5\u4e0b\u6765\u662f\u5ba2\u6237\u7aef\u7684\u5de5\u4f5c\u6d41\u7a0b:<\/h4>\n\n\n\n
1.\u521b\u5efa\u5ba2\u6237\u7aef\u7684socket\u3002\n2.\u5411\u670d\u52a1\u5668\u53d1\u8d77\u8fde\u63a5\u8bf7\u6c42\u3002\n3.\u4e0e\u670d\u52a1\u7aef\u901a\u4fe1\uff0c\u53d1\u9001\u4e00\u4e2a\u62a5\u6587\u540e\u7b49\u5f85\u56de\u590d\uff0c\u7136\u540e\u518d\u53d1\u4e0b\u4e00\u4e2a\u62a5\u6587\u3002\n4.\u4e0d\u65ad\u7684\u91cd\u590d\u7b2c3\uff09\u6b65\uff0c\u76f4\u5230\u5168\u90e8\u7684\u6570\u636e\u88ab\u53d1\u9001\u5b8c\u3002\n5.\u7b2c4\u6b65\uff1a\u5173\u95edsocket\uff0c\u91ca\u653e\u8d44\u6e90\u3002\n<\/pre>\n\n\n\n
\u5ba2\u6237\u7aef\u4ee3\u7801\u5c55\u793aclient.cpp<\/h5>\n\n\n\n
<\/pre>\n\n\n\n
#include <stdio.h>\n#include <string.h>\n#include <unistd.h>\n#include <stdlib.h>\n#include <netdb.h>\n#include <sys\/types.h>\n#include <sys\/socket.h>\n#include <arpa\/inet.h>\n \nint main(int argc,char *argv[])\n{\n  if (argc!=3)\n  {\n    printf(\"please input a port after .\/server\\n\"); return -1;\n  }\n \n  \/\/ \u7b2c1\u6b65\uff1a\u521b\u5efa\u5ba2\u6237\u7aef\u7684socket\u3002\n  int sockfd;\n  if ( (sockfd = socket(AF_INET,SOCK_STREAM,0))==-1) { perror(\"socket\"); return -1; }\n \n  \/\/ \u7b2c2\u6b65\uff1a\u5411\u670d\u52a1\u5668\u53d1\u8d77\u8fde\u63a5\u8bf7\u6c42\u3002\n  struct hostent* h;\n  if ( (h = gethostbyname(argv[1])) == 0 )   \/\/ \u6307\u5b9a\u670d\u52a1\u7aef\u7684ip\u5730\u5740\u3002\n  { printf(\"gethostbyname failed.\\n\"); close(sockfd); return -1; }\n  struct sockaddr_in servaddr;\n  memset(&servaddr,0,sizeof(servaddr));\n  servaddr.sin_family = AF_INET;\n  servaddr.sin_port = htons(atoi(argv[2])); \/\/ \u6307\u5b9a\u670d\u52a1\u7aef\u7684\u901a\u4fe1\u7aef\u53e3\u3002\n  memcpy(&servaddr.sin_addr,h->h_addr,h->h_length);\n  if (connect(sockfd, (struct sockaddr *)&servaddr,sizeof(servaddr)) != 0)  \/\/ \u5411\u670d\u52a1\u7aef\u53d1\u8d77\u8fde\u63a5\u6e05\u6c42\u3002\n  { perror(\"connect\"); close(sockfd); return -1; }\n \n  char buffer[1024];\n \n  \/\/ \u7b2c3\u6b65\uff1a\u4e0e\u670d\u52a1\u7aef\u901a\u4fe1\uff0c\u53d1\u9001\u4e00\u4e2a\u62a5\u6587\u540e\u7b49\u5f85\u56de\u590d\uff0c\u7136\u540e\u518d\u53d1\u4e0b\u4e00\u4e2a\u62a5\u6587\u3002\n  for (int i=0;i<6;i++)\n  {\n    int iret;\n    memset(buffer,0,sizeof(buffer));\n    sprintf(buffer,\"\u8fd9\u662f\u7b2c%d\u4e2a\u6570\u636e\u5305\",i+1);\n    if ( (iret=send(sockfd,buffer,strlen(buffer),0))<=0) \/\/ \u5411\u670d\u52a1\u7aef\u53d1\u9001\u8bf7\u6c42\u62a5\u6587\u3002\n    { perror(\"send\"); break; }\n    printf(\"\u53d1\u9001\uff1a%s\\n\",buffer);\n \n    memset(buffer,0,sizeof(buffer));\n    if ( (iret=recv(sockfd,buffer,sizeof(buffer),0))<=0) \/\/ \u63a5\u6536\u670d\u52a1\u7aef\u7684\u56de\u5e94\u62a5\u6587\u3002\n    {\n       printf(\"iret=%d\\n\",iret); break;\n    }\n    printf(\"\u63a5\u6536\uff1a%s\\n\",buffer);\n  }\n \n  \/\/ \u7b2c4\u6b65\uff1a\u5173\u95edsocket\uff0c\u91ca\u653e\u8d44\u6e90\u3002\n  close(sockfd);\n}<\/code><\/pre>\n\n\n\n
\u6ce8\u610f:\u4f7f\u7528\u7684\u7aef\u53e3\u90fd\u9700\u8981\u5f00\u653e<\/strong><\/p>\n\n\n\n
\u4e00\u4e9b\u9700\u8981\u6ce8\u610f\u7684\u70b9<\/h3>\n\n\n\n
1\u3001socket\u6587\u4ef6\u63cf\u8ff0\u7b26<\/p>\n\n\n\n
\u5728UNIX\u7cfb\u7edf\u4e2d\uff0c\u4e00\u5207\u8f93\u5165\u8f93\u51fa\u8bbe\u5907\u7686\u6587\u4ef6\uff0csocket()\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5176\u672c\u8d28\u662f\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u662f\u4e00\u4e2a\u6574\u6570\u3002<\/p>\n\n\n\n
2\u3001\u670d\u52a1\u7aef\u7a0b\u5e8f\u7ed1\u5b9a\u5730\u5740
\u5982\u679c\u670d\u52a1\u5668\u6709\u591a\u4e2a\u7f51\u5361\uff0c\u591a\u4e2aIP\u5730\u5740\uff0csocket\u901a\u4fe1\u53ef\u4ee5\u6307\u5b9a\u7528\u5176\u4e2d\u4e00\u4e2a\u5730\u5740\u6765\u8fdb\u884c\u901a\u4fe1\uff0c\u4e5f\u53ef\u4ee5\u4efb\u610fip\u5730\u5740\u3002<\/p>\n\n\n\n
  1.\u6307\u5b9aip\u5730\u5740\u7684\u4ee3\u7801\n<\/pre>\n\n\n\n
m_servaddr.sin_addr.s_addr = inet_addr(\"192.168.149.129\");  \/\/ \u6307\u5b9aip\u5730\u5740\n<\/pre>\n\n\n\n
  2.\u4efb\u610fip\u5730\u5740\u7684\u4ee3\u7801\n<\/pre>\n\n\n\n
  m_servaddr.sin_addr.s_addr = htonl(INADDR_ANY);  \/\/ \u672c\u4e3b\u673a\u7684\u4efb\u610fip\u5730\u5740\n<\/pre>\n\n\n\n
\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u91c7\u7528\u4efb\u610fip\u5730\u5740\u7684\u65b9\u5f0f\u6bd4\u8f83\u591a\u3002
3\u3001\u670d\u52a1\u7aef\u7a0b\u5e8f\u7ed1\u5b9a\u7684\u901a\u4fe1\u7aef\u53e3<\/p>\n\n\n\n
 m_servaddr.sin_port = htons(5000);  \/\/ \u901a\u4fe1\u7aef\u53e3\n<\/pre>\n\n\n\n
4\u3001\u5ba2\u6237\u7aef\u7a0b\u5e8f\u6307\u5b9a\u670d\u52a1\u7aef\u7684ip\u5730\u5740<\/p>\n\n\n\n
struct hostent* h;\nif ( (h = gethostbyname(\"118.89.50.198\")) == 0 )   \/\/ \u6307\u5b9a\u670d\u52a1\u7aef\u7684ip\u5730\u5740\u3002\n{ printf(\"gethostbyname failed.\\n\"); close(sockfd); return -1; }\n<\/pre>\n\n\n\n
5\u3001\u5ba2\u6237\u7aef\u7a0b\u5e8f\u6307\u5b9a\u670d\u52a1\u7aef\u7684\u901a\u4fe1\u7aef\u53e3<\/p>\n\n\n\n
servaddr.sin_port = htons(5000);\n<\/pre>\n\n\n\n
6\u3001send\u51fd\u6570
send\u51fd\u6570\u7528\u4e8e\u628a\u6570\u636e\u901a\u8fc7socket\u53d1\u9001\u7ed9\u5bf9\u7aef\u3002\u4e0d\u8bba\u662f\u5ba2\u6237\u7aef\u8fd8\u662f\u670d\u52a1\u7aef\uff0c\u5e94\u7528\u7a0b\u5e8f\u90fd\u7528send\u51fd\u6570\u6765\u5411TCP\u8fde\u63a5\u7684\u53e6\u4e00\u7aef\u53d1\u9001\u6570\u636e\u3002<\/p>\n\n\n\n
\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n\n\n\n
ssize_t send(int sockfd, const void *buf, size_t len, int flags);\n<\/pre>\n\n\n\n
sockfd\u4e3a\u5df2\u5efa\u7acb\u597d\u8fde\u63a5\u7684socket\u3002<\/p>\n\n\n\n
buf\u4e3a\u9700\u8981\u53d1\u9001\u7684\u6570\u636e\u7684\u5185\u5b58\u5730\u5740\uff0c\u53ef\u4ee5\u662fC\u8bed\u8a00\u57fa\u672c\u6570\u636e\u7c7b\u578b\u53d8\u91cf\u7684\u5730\u5740\uff0c\u4e5f\u53ef\u4ee5\u6570\u7ec4\u3001\u7ed3\u6784\u4f53\u3001\u5b57\u7b26\u4e32\uff0c\u5185\u5b58\u4e2d\u6709\u4ec0\u4e48\u5c31\u53d1\u9001\u4ec0\u4e48\u3002<\/p>\n\n\n\n
len\u9700\u8981\u53d1\u9001\u7684\u6570\u636e\u7684\u957f\u5ea6\uff0c\u4e3abuf\u4e2d\u6709\u6548\u6570\u636e\u7684\u957f\u5ea6\u3002<\/p>\n\n\n\n
flags\u586b0, \u5176\u4ed6\u6570\u503c\u610f\u4e49\u4e0d\u5927\u3002<\/p>\n\n\n\n
\u51fd\u6570\u8fd4\u56de\u5df2\u53d1\u9001\u7684\u5b57\u7b26\u6570\u3002\u51fa\u9519\u65f6\u8fd4\u56de-1\uff0c\u9519\u8bef\u4fe1\u606ferrno\u88ab\u6807\u8bb0\u3002<\/p>\n\n\n\n
\u6ce8\u610f\uff0c\u5c31\u7b97\u662f\u7f51\u7edc\u65ad\u5f00\uff0c\u6216socket\u5df2\u88ab\u5bf9\u7aef\u5173\u95ed\uff0csend\u51fd\u6570\u4e0d\u4f1a\u7acb\u5373\u62a5\u9519\uff0c\u8981\u8fc7\u51e0\u79d2\u624d\u4f1a\u62a5\u9519\u3002<\/p>\n\n\n\n
\u5982\u679csend\u51fd\u6570\u8fd4\u56de\u7684\u9519\u8bef\uff08<=0\uff09\uff0c\u8868\u793a\u901a\u4fe1\u94fe\u8def\u5df2\u4e0d\u53ef\u7528\u3002
7\u3001recv\u51fd\u6570
recv\u51fd\u6570\u7528\u4e8e\u63a5\u6536\u5bf9\u7aefsocket\u53d1\u9001\u8fc7\u6765\u7684\u6570\u636e\u3002<\/p>\n\n\n\n
recv\u51fd\u6570\u7528\u4e8e\u63a5\u6536\u5bf9\u7aef\u901a\u8fc7socket\u53d1\u9001\u8fc7\u6765\u7684\u6570\u636e\u3002\u4e0d\u8bba\u662f\u5ba2\u6237\u7aef\u8fd8\u662f\u670d\u52a1\u7aef\uff0c\u5e94\u7528\u7a0b\u5e8f\u90fd\u7528recv\u51fd\u6570\u63a5\u6536\u6765\u81eaTCP\u8fde\u63a5\u7684\u53e6\u4e00\u7aef\u53d1\u9001\u8fc7\u6765\u6570\u636e\u3002<\/p>\n\n\n\n
\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n\n\n\n
ssize_t recv(int sockfd, void *buf, size_t len, int flags);\n<\/pre>\n\n\n\n
sockfd\u4e3a\u5df2\u5efa\u7acb\u597d\u8fde\u63a5\u7684socket\u3002<\/p>\n\n\n\n
buf\u4e3a\u7528\u4e8e\u63a5\u6536\u6570\u636e\u7684\u5185\u5b58\u5730\u5740\uff0c\u53ef\u4ee5\u662fC\u8bed\u8a00\u57fa\u672c\u6570\u636e\u7c7b\u578b\u53d8\u91cf\u7684\u5730\u5740\uff0c\u4e5f\u53ef\u4ee5\u6570\u7ec4\u3001\u7ed3\u6784\u4f53\u3001\u5b57\u7b26\u4e32\uff0c\u53ea\u8981\u662f\u4e00\u5757\u5185\u5b58\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n
len\u9700\u8981\u63a5\u6536\u6570\u636e\u7684\u957f\u5ea6\uff0c\u4e0d\u80fd\u8d85\u8fc7buf\u7684\u5927\u5c0f\uff0c\u5426\u5219\u5185\u5b58\u6ea2\u51fa\u3002<\/p>\n\n\n\n
flags\u586b0, \u5176\u4ed6\u6570\u503c\u610f\u4e49\u4e0d\u5927\u3002<\/p>\n\n\n\n
\u51fd\u6570\u8fd4\u56de\u5df2\u63a5\u6536\u7684\u5b57\u7b26\u6570\u3002\u51fa\u9519\u65f6\u8fd4\u56de-1\uff0c\u5931\u8d25\u65f6\u4e0d\u4f1a\u8bbe\u7f6eerrno\u7684\u503c\u3002<\/p>\n\n\n\n
\u5982\u679csocket\u7684\u5bf9\u7aef\u6ca1\u6709\u53d1\u9001\u6570\u636e\uff0crecv\u51fd\u6570\u5c31\u4f1a\u7b49\u5f85\uff0c\u5982\u679c\u5bf9\u7aef\u53d1\u9001\u4e86\u6570\u636e\uff0c\u51fd\u6570\u8fd4\u56de\u63a5\u6536\u5230\u7684\u5b57\u7b26\u6570\u3002\u51fa\u9519\u65f6\u8fd4\u56de-1\u3002\u5982\u679csocket\u88ab\u5bf9\u7aef\u5173\u95ed\uff0c\u8fd4\u56de\u503c\u4e3a0\u3002<\/p>\n\n\n\n
\u5982\u679crecv\u51fd\u6570\u8fd4\u56de\u7684\u9519\u8bef\uff08<=0\uff09\uff0c\u8868\u793a\u901a\u4fe1\u901a\u9053\u5df2\u4e0d\u53ef\u7528\u3002
8\u3001\u670d\u52a1\u7aef\u6709\u4e24\u4e2asocket
\u5bf9\u670d\u52a1\u7aef\u6765\u8bf4\uff0c\u6709\u4e24\u4e2asocket\uff0c\u4e00\u4e2a\u662f\u7528\u4e8e\u76d1\u542c\u7684socket\uff0c\u8fd8\u6709\u4e00\u4e2a\u5c31\u662f\u5ba2\u6237\u7aef\u8fde\u63a5\u6210\u529f\u540e\uff0c\u7531accept\u51fd\u6570\u521b\u5efa\u7684\u7528\u4e8e\u4e0e\u5ba2\u6237\u7aef\u6536\u53d1\u62a5\u6587\u7684socket\u3002<\/p>\n\n\n\n
9\u3001\u7a0b\u5e8f\u9000\u51fa\u65f6\u5148\u5173\u95edsocket
socket\u662f\u7cfb\u7edf\u8d44\u6e90\uff0c\u64cd\u4f5c\u7cfb\u7edf\u6253\u5f00\u7684socket\u6570\u91cf\u662f\u6709\u9650\u7684\uff0c\u5728\u7a0b\u5e8f\u9000\u51fa\u4e4b\u524d\u5fc5\u987b\u5173\u95ed\u5df2\u6253\u5f00\u7684socket\uff0c\u5c31\u50cf\u5173\u95ed\u6587\u4ef6\u6307\u9488\u4e00\u6837\uff0c\u5c31\u50cfdelete\u5df2\u5206\u914d\u7684\u5185\u5b58\u4e00\u6837\uff0c\u6781\u5176\u91cd\u8981\u3002<\/p>\n\n\n\n
\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5173\u95edsocket\u7684\u4ee3\u7801\u4e0d\u80fd\u53ea\u5728main\u51fd\u6570\u7684\u6700\u540e\uff0c\u90a3\u662f\u7a0b\u5e8f\u8fd0\u884c\u7684\u7406\u60f3\u72b6\u6001\uff0c\u8fd8\u5e94\u8be5\u5728main\u51fd\u6570\u7684\u6bcf\u4e2areturn\u4e4b\u524d\u5173\u95ed\u3002<\/p>\n\n\n\n
\u8be5\u9879\u76ee\u4f7f\u7528\u7684\u5e93\u51fd\u6570<\/h2>\n\n\n\n
1\u3001socket\u51fd\u6570<\/h4>\n\n\n\n
socket\u51fd\u6570\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684socket\uff0c\u4e5f\u5c31\u662f\u5411\u7cfb\u7edf\u7533\u8bf7\u4e00\u4e2asocket\u8d44\u6e90\u3002socket\u51fd\u6570\u7528\u6237\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u3002<\/p>\n\n\n\n
\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n\n\n\n
int socket(int domain, int type, int protocol);\n<\/pre>\n\n\n\n
\u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n\n\n\n
domain\uff1a\u534f\u8bae\u57df\uff0c\u53c8\u79f0\u534f\u8bae\u65cf\uff08family\uff09\u3002\u5e38\u7528\u7684\u534f\u8bae\u65cf\u6709AF_INET\u3001AF_INET6\u3001AF_LOCAL\uff08\u6216\u79f0AF_UNIX\uff0cUnix\u57dfSocket\uff09\u3001AF_ROUTE\u7b49\u3002\u534f\u8bae\u65cf\u51b3\u5b9a\u4e86socket\u7684\u5730\u5740\u7c7b\u578b\uff0c\u5728\u901a\u4fe1\u4e2d\u5fc5\u987b\u91c7\u7528\u5bf9\u5e94\u7684\u5730\u5740\uff0c\u5982AF_INET\u51b3\u5b9a\u4e86\u8981\u7528ipv4\u5730\u5740\uff0832\u4f4d\u7684\uff09\u4e0e\u7aef\u53e3\u53f7\uff0816\u4f4d\u7684\uff09\u7684\u7ec4\u5408\u3001AF_UNIX\u51b3\u5b9a\u4e86\u8981\u7528\u4e00\u4e2a\u7edd\u5bf9\u8def\u5f84\u540d\u4f5c\u4e3a\u5730\u5740\u3002<\/p>\n\n\n\n
type\uff1a\u6307\u5b9asocket\u7c7b\u578b\u3002\u5e38\u7528\u7684socket\u7c7b\u578b\u6709SOCK_STREAM\u3001SOCK_DGRAM\u3001SOCK_RAW\u3001SOCK_PACKET\u3001SOCK_SEQPACKET\u7b49\u3002\u6d41\u5f0fsocket\uff08SOCK_STREAM\uff09\u662f\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684socket\uff0c\u9488\u5bf9\u4e8e\u9762\u5411\u8fde\u63a5\u7684TCP\u670d\u52a1\u5e94\u7528\u3002\u6570\u636e\u62a5\u5f0fsocket\uff08SOCK_DGRAM\uff09\u662f\u4e00\u79cd\u65e0\u8fde\u63a5\u7684socket\uff0c\u5bf9\u5e94\u4e8e\u65e0\u8fde\u63a5\u7684UDP\u670d\u52a1\u5e94\u7528\u3002<\/p>\n\n\n\n
protocol\uff1a\u6307\u5b9a\u534f\u8bae\u3002\u5e38\u7528\u534f\u8bae\u6709IPPROTO_TCP\u3001IPPROTO_UDP\u3001IPPROTO_STCP\u3001IPPROTO_TIPC\u7b49\uff0c\u5206\u522b\u5bf9\u5e94TCP\u4f20\u8f93\u534f\u8bae\u3001UDP\u4f20\u8f93\u534f\u8bae\u3001STCP\u4f20\u8f93\u534f\u8bae\u3001TIPC\u4f20\u8f93\u534f\u8bae\u3002<\/p>\n\n\n\n
\u8bf4\u4e86\u4e00\u5927\u5806\u5e9f\u8bdd\uff0c\u7b2c\u4e00\u4e2a\u53c2\u6570\u53ea\u80fd\u586bAF_INET\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u53ea\u80fd\u586bSOCK_STREAM\uff0c\u7b2c\u4e09\u4e2a\u53c2\u6570\u53ea\u80fd\u586b0\u3002<\/p>\n\n\n\n
\u9664\u975e\u7cfb\u7edf\u8d44\u6599\u8017\u5c3d\uff0csocket\u51fd\u6570\u4e00\u822c\u4e0d\u4f1a\u8fd4\u56de\u5931\u8d25\u3002<\/p>\n\n\n\n
\u8fd4\u56de\u503c\uff1a\u6210\u529f\u5219\u8fd4\u56de\u4e00\u4e2asocket\uff0c\u5931\u8d25\u8fd4\u56de-1\uff0c\u9519\u8bef\u539f\u56e0\u5b58\u4e8eerrno \u4e2d\u3002<\/p>\n\n\n\n
2\u3001gethostbyname\u51fd\u6570<\/h4>\n\n\n\n
\u628aip\u5730\u5740\u6216\u57df\u540d\u8f6c\u6362\u4e3ahostent \u7ed3\u6784\u4f53\u8868\u8fbe\u7684\u5730\u5740\u3002<\/p>\n\n\n\n
\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n\n\n\n
struct hostent *gethostbyname(const char *name);\n<\/pre>\n\n\n\n
\u53c2\u6570name\uff0c\u57df\u540d\u6216\u8005\u4e3b\u673a\u540d\uff0c\u4f8b\u5982”192.168.1.3″\u3001”www.freecplus.net<\/a>“\u7b49\u3002<\/p>\n\n\n\n
\u8fd4\u56de\u503c\uff1a\u5982\u679c\u6210\u529f\uff0c\u8fd4\u56de\u4e00\u4e2ahostent\u7ed3\u6784\u6307\u9488\uff0c\u5931\u8d25\u8fd4\u56deNULL\u3002<\/p>\n\n\n\n
gethostbyname\u53ea\u7528\u4e8e\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n
gethostbyname\u53ea\u662f\u628a\u5b57\u7b26\u4e32\u7684ip\u5730\u5740\u8f6c\u6362\u4e3a\u7ed3\u6784\u4f53\u7684ip\u5730\u5740\uff0c\u53ea\u8981\u5730\u5740\u683c\u5f0f\u6ca1\u9519\uff0c\u4e00\u822c\u4e0d\u4f1a\u8fd4\u56de\u9519\u8bef\u3002\u5931\u8d25\u65f6\u4e0d\u4f1a\u8bbe\u7f6eerrno\u7684\u503c\u3002<\/p>\n\n\n\n
3\u3001connect\u51fd\u6570<\/h4>\n\n\n\n
\u5411\u670d\u52a1\u5668\u53d1\u8d77\u8fde\u63a5\u8bf7\u6c42\u3002<\/p>\n\n\n\n
\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n\n\n\n
int connect(int sockfd, struct sockaddr * serv_addr, int addrlen);\n<\/pre>\n\n\n\n
\u51fd\u6570\u8bf4\u660e\uff1aconnect\u51fd\u6570\u7528\u4e8e\u5c06\u53c2\u6570sockfd \u7684socket \u8fde\u81f3\u53c2\u6570serv_addr \u6307\u5b9a\u7684\u670d\u52a1\u7aef\uff0c\u53c2\u6570addrlen\u4e3asockaddr\u7684\u7ed3\u6784\u957f\u5ea6\u3002<\/p>\n\n\n\n
\u8fd4\u56de\u503c\uff1a\u6210\u529f\u5219\u8fd4\u56de0\uff0c\u5931\u8d25\u8fd4\u56de-1\uff0c\u9519\u8bef\u539f\u56e0\u5b58\u4e8eerrno \u4e2d\u3002<\/p>\n\n\n\n
connect\u51fd\u6570\u53ea\u7528\u4e8e\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n
\u5982\u679c\u670d\u52a1\u7aef\u7684\u5730\u5740\u9519\u4e86\uff0c\u6216\u7aef\u53e3\u9519\u4e86\uff0c\u6216\u670d\u52a1\u7aef\u6ca1\u6709\u542f\u52a8\uff0cconnect\u4e00\u5b9a\u4f1a\u5931\u8d25\u3002<\/p>\n\n\n\n
4\u3001bind\u51fd\u6570<\/h4>\n\n\n\n
\u670d\u52a1\u7aef\u628a\u7528\u4e8e\u901a\u4fe1\u7684\u5730\u5740\u548c\u7aef\u53e3\u7ed1\u5b9a\u5230socket\u4e0a\u3002<\/p>\n\n\n\n
\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n\n\n\n
int bind(int sockfd, const struct sockaddr *addr,socklen_t addrlen);\n<\/pre>\n\n\n\n
\u53c2\u6570sockfd\uff0c\u9700\u8981\u7ed1\u5b9a\u7684socket\u3002<\/p>\n\n\n\n
\u53c2\u6570addr\uff0c\u5b58\u653e\u4e86\u670d\u52a1\u7aef\u7528\u4e8e\u901a\u4fe1\u7684\u5730\u5740\u548c\u7aef\u53e3\u3002<\/p>\n\n\n\n
\u53c2\u6570addrlen\u8868\u793aaddr\u7ed3\u6784\u4f53\u7684\u5927\u5c0f\u3002<\/p>\n\n\n\n
\u8fd4\u56de\u503c\uff1a\u6210\u529f\u5219\u8fd4\u56de0\uff0c\u5931\u8d25\u8fd4\u56de-1\uff0c\u9519\u8bef\u539f\u56e0\u5b58\u4e8eerrno \u4e2d\u3002<\/p>\n\n\n\n
\u5982\u679c\u7ed1\u5b9a\u7684\u5730\u5740\u9519\u8bef\uff0c\u6216\u7aef\u53e3\u5df2\u88ab\u5360\u7528\uff0cbind\u51fd\u6570\u4e00\u5b9a\u4f1a\u62a5\u9519\uff0c\u5426\u5219\u4e00\u822c\u4e0d\u4f1a\u8fd4\u56de\u9519\u8bef\u3002<\/p>\n\n\n\n
5\u3001listen\u51fd\u6570<\/h4>\n\n\n\n
listen\u51fd\u6570\u628a\u4e3b\u52a8\u8fde\u63a5socket\u53d8\u4e3a\u88ab\u52a8\u8fde\u63a5\u7684socket\uff0c\u4f7f\u5f97\u8fd9\u4e2asocket\u53ef\u4ee5\u63a5\u53d7\u5176\u5b83socket\u7684\u8fde\u63a5\u8bf7\u6c42\uff0c\u4ece\u800c\u6210\u4e3a\u4e00\u4e2a\u670d\u52a1\u7aef\u7684socket\u3002<\/p>\n\n\n\n
\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n\n\n\n
int listen(int sockfd, int backlog);\n<\/pre>\n\n\n\n
\u8fd4\u56de\uff1a0-\u6210\u529f\uff0c -1-\u5931\u8d25<\/p>\n\n\n\n
\u53c2\u6570sockfd\u662f\u5df2\u7ecf\u88abbind\u8fc7\u7684socket\u3002socket\u51fd\u6570\u8fd4\u56de\u7684socket\u662f\u4e00\u4e2a\u4e3b\u52a8\u8fde\u63a5\u7684socket\uff0c\u5728\u670d\u52a1\u7aef\u7684\u7f16\u7a0b\u4e2d\uff0c\u7a0b\u5e8f\u5458\u5e0c\u671b\u8fd9\u4e2asocket\u53ef\u4ee5\u63a5\u53d7\u5916\u6765\u7684\u8fde\u63a5\u8bf7\u6c42\uff0c\u4e5f\u5c31\u662f\u88ab\u52a8\u7b49\u5f85\u5ba2\u6237\u7aef\u6765\u8fde\u63a5\u3002\u7531\u4e8e\u7cfb\u7edf\u9ed8\u8ba4\u65f6\u8ba4\u4e3a\u4e00\u4e2asocket\u662f\u4e3b\u52a8\u8fde\u63a5\u7684\uff0c\u6240\u4ee5\u9700\u8981\u901a\u8fc7\u67d0\u79cd\u65b9\u5f0f\u6765\u544a\u8bc9\u7cfb\u7edf\uff0c\u7a0b\u5e8f\u5458\u901a\u8fc7\u8c03\u7528listen\u51fd\u6570\u6765\u5b8c\u6210\u8fd9\u4ef6\u4e8b\u3002<\/p>\n\n\n\n
\u53c2\u6570backlog\uff0c\u8fd9\u4e2a\u53c2\u6570\u6d89\u53ca\u5230\u4e00\u4e9b\u7f51\u7edc\u7684\u7ec6\u8282\uff0c\u6bd4\u8f83\u9ebb\u70e6\uff0c\u586b5\u300110\u90fd\u884c\uff0c\u4e00\u822c\u4e0d\u8d85\u8fc730\u3002<\/p>\n\n\n\n
\u5f53\u8c03\u7528listen\u4e4b\u540e\uff0c\u670d\u52a1\u7aef\u7684socket\u5c31\u53ef\u4ee5\u8c03\u7528accept\u6765\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/p>\n\n\n\n
\u8fd4\u56de\u503c\uff1a\u6210\u529f\u5219\u8fd4\u56de0\uff0c\u5931\u8d25\u8fd4\u56de-1\uff0c\u9519\u8bef\u539f\u56e0\u5b58\u4e8eerrno \u4e2d\u3002<\/p>\n\n\n\n
listen\u51fd\u6570\u4e00\u822c\u4e0d\u4f1a\u8fd4\u56de\u9519\u8bef\u3002<\/p>\n\n\n\n
6\u3001accept\u51fd\u6570<\/h4>\n\n\n\n
\u670d\u52a1\u7aef\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u3002<\/p>\n\n\n\n
\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n\n\n\n
int accept(int sockfd,struct sockaddr *addr,socklen_t *addrlen);\n<\/pre>\n\n\n\n
\u53c2\u6570sockfd\u662f\u5df2\u7ecf\u88ablisten\u8fc7\u7684socket\u3002<\/p>\n\n\n\n
\u53c2\u6570addr\u7528\u4e8e\u5b58\u653e\u5ba2\u6237\u7aef\u7684\u5730\u5740\u4fe1\u606f\uff0c\u7528sockaddr\u7ed3\u6784\u4f53\u8868\u8fbe\uff0c\u5982\u679c\u4e0d\u9700\u8981\u5ba2\u6237\u7aef\u7684\u5730\u5740\uff0c\u53ef\u4ee5\u586b0\u3002<\/p>\n\n\n\n
\u53c2\u6570addrlen\u7528\u4e8e\u5b58\u653eaddr\u53c2\u6570\u7684\u957f\u5ea6\uff0c\u5982\u679caddr\u4e3a0\uff0caddrlen\u4e5f\u586b0\u3002<\/p>\n\n\n\n
accept\u51fd\u6570\u7b49\u5f85\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\uff0c\u5982\u679c\u6ca1\u6709\u5ba2\u6237\u7aef\u8fde\u4e0a\u6765\uff0c\u5b83\u5c31\u4e00\u76f4\u7b49\u5f85\uff0c\u8fd9\u79cd\u65b9\u5f0f\u79f0\u4e4b\u4e3a\u963b\u585e\u3002<\/p>\n\n\n\n
accept\u7b49\u5f85\u5230\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u540e\uff0c\u521b\u5efa\u4e00\u4e2a\u65b0\u7684socket\uff0c\u51fd\u6570\u8fd4\u56de\u503c\u5c31\u662f\u8fd9\u4e2a\u65b0\u7684socket\uff0c\u670d\u52a1\u7aef\u4f7f\u7528\u8fd9\u4e2a\u65b0\u7684socket\u548c\u5ba2\u6237\u7aef\u8fdb\u884c\u62a5\u6587\u7684\u6536\u53d1\u3002<\/p>\n\n\n\n
\u8fd4\u56de\u503c\uff1a\u6210\u529f\u5219\u8fd4\u56de0\uff0c\u5931\u8d25\u8fd4\u56de-1\uff0c\u9519\u8bef\u539f\u56e0\u5b58\u4e8eerrno \u4e2d\u3002<\/p>\n\n\n\n
accept\u5728\u7b49\u5f85\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u88ab\u4e2d\u65ad\u6216\u5176\u5b83\u7684\u539f\u56e0\uff0c\u51fd\u6570\u8fd4\u56de-1\uff0c\u8868\u793a\u5931\u8d25\uff0c\u5982\u679c\u5931\u8d25\uff0c\u53ef\u4ee5\u91cd\u65b0accept\u3002<\/p>\n\n\n\n
7\u3001\u51fd\u6570\u5c0f\u7ed3<\/h4>\n\n\n\n
\u670d\u52a1\u7aef\u51fd\u6570\u8c03\u7528\u7684\u6d41\u7a0b\u662f\uff1asocket->bind->listen->accept->recv\/send->close<\/h4>\n\n\n\n
\u5ba2\u6237\u7aef\u51fd\u6570\u8c03\u7528\u7684\u6d41\u7a0b\u662f\uff1asocket->connect->send\/recv->close<\/h4>\n\n\n\n
\u5176\u4e2dsend\/recv\u53ef\u4ee5\u8fdb\u884c\u591a\u6b21\u4ea4\u4e92\u3002 \u200b<\/p>\n","protected":false},"excerpt":{"rendered":"
\u200b \u672c\u6559\u7a0b\u4e3b\u8981\u8bb2\u8ff0\u7684\u662fc++\u7f51\u7edc\u7f16\u7a0b\uff0c\u9700\u8981\u4e00\u5b9a\u7684c++\u57fa\u7840\u548c\u8ba1\u7b97\u673a\u7f51\u7edc\u57fa\u7840\u4ee5\u53ca\u64cd\u4f5c\u7cfb\u7edf\u57fa\u7840\uff0c\u8bdd\u4e0d\u591a\u8bf4\uff0c\u76f4\u63a5\u5f00\u59cb […]<\/p>\n","protected":false},"author":1,"featured_media":106,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[22,23,24,21],"class_list":["post-23","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2","tag-c","tag-socket","tag-socket-c","tag-21"],"_links":{"self":[{"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/posts\/23","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/comments?post=23"}],"version-history":[{"count":2,"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/posts\/23\/revisions"}],"predecessor-version":[{"id":205,"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/posts\/23\/revisions\/205"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/media\/106"}],"wp:attachment":[{"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/media?parent=23"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/categories?post=23"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhzxs.site\/index.php\/wp-json\/wp\/v2\/tags?post=23"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}