作业1：select客户端
1 #include <myhead.h>
2 #define SERPORT 8888
3 #define SERIP "192.168.125.159"
4
5 #define CLIPORT 6666
6 #define CLIIP "192.168.125.159"
7
8 int main(int argc, const char *argv[])
9 {
10 int ret = -1;
11 int cfd = -1;
12 cfd = socket(AF_INET,SOCK_STREAM,0);
13 PERROR_INFO(cfd);
14
15 printf("cfd = %d\n",cfd);
16
17
18 int reuse = 1;
19 ret = setsockopt(cfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse));
20 PERROR_INFO(ret);
21
22
23 struct sockaddr_in cin;
24 cin.sin_family = AF_INET;
25 cin.sin_port = htons(CLIPORT);
26 cin.sin_addr.s_addr = inet_addr(CLIIP);
27
28 ret = bind(cfd,(struct sockaddr *)&cin,sizeof(cin));
29 PERROR_INFO(ret);
30
31
32 struct sockaddr_in sin;
33 sin.sin_family = AF_INET;
34 sin.sin_port = htons(SERPORT);
35 sin.sin_addr.s_addr = inet_addr(SERIP);
36
37 ret = connect(cfd,(struct sockaddr *)&sin,sizeof(sin));
38 PERROR_INFO(ret);
39
40 char wbuf[128];
41
42 fd_set readfds;
43 FD_ZERO(&readfds);
44 FD_SET(0,&readfds);
45 FD_SET(cfd,&readfds);
46
47 fd_set tempfds;
48
49
50 while (1)
51 {
52 tempfds = readfds;
53 ret = select(cfd+1,&tempfds,NULL,NULL,NULL);
54
55
56 if (FD_ISSET(0,&tempfds))
57 {
58
59 bzero(wbuf,sizeof(wbuf));
60 fgets(wbuf,sizeof(wbuf),stdin);
61 wbuf[strlen(wbuf)-1] = 0;
62
63 send(cfd,wbuf,sizeof(wbuf),0);
64 bzero(wbuf,sizeof(wbuf));
65
66 }
67
68 if (FD_ISSET(cfd,&tempfds))
69 {
70 ret = recv(cfd,wbuf,sizeof(wbuf),0);
71 if (ret == 0)
72 {
73 printf("serve is offline\n");
74 break;
75 }
76 printf("[%s:%d]: %s\n",SERIP,SERPORT,wbuf);
77 }
78
79
80 }
81 close(cfd);
82
83 return 0;
84 }
作业2：poll服务器
1 #include <myhead.h>
2 #define PORT 8888
3 #define IP "192.168.125.159"
4
5
6 int main(int argc, const char *argv[])
7 {
8 int ret = -1;
9 int sfd = -1;
10 sfd = socket(AF_INET,SOCK_STREAM,0);
11 PERROR_INFO(sfd);
12
13 printf("sfd = %d\n",sfd);
14
15 int reuse = 1;
16 ret = setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse));
17 PERROR_INFO(ret);
18
19
20 struct sockaddr_in sin;
21 sin.sin_family = AF_INET;
22 sin.sin_port = htons(PORT);
23 sin.sin_addr.s_addr = inet_addr(IP);
24
25 ret = bind(sfd,(struct sockaddr *)&sin,sizeof(sin));
26 PERROR_INFO(ret);
27
28 ret = listen(sfd,128);
29 PERROR_INFO(ret);
30
31 //ret = accept(sfd,NULL,NULL);
32 //PERROR_INFO(ret);
33
34 struct sockaddr_in cin;
35 socklen_t socklen = sizeof(cin);
36 int newfd = -1;
37
38 char buf[128] = "";
39
40 struct pollfd fds[1024];
41 fds[0].fd = 0;
42 fds[0].events = POLLIN;
43
44 fds[1].fd = sfd;
45 fds[1].events = POLLIN;
46
47 int count = 2;//顺序表的总数
48
49
50 char rbuf[128] = "";
51 struct sockaddr_in cins[1024];
52
53 while (1)
54 {
55
56 ret = poll(fds,count,-1);
57
58 //printf("aaaaaaaa\n");
59 if (ret == 0)
60 {
61 printf("time out\n");
62 return -1;
63 }
64 else if(ret < 0)
65 {
66 PERROR_INFO(-1);
67 }
68 for (int index = 0;index <count ;index++ )
69 {
70
71 if (fds[index].revents != POLLIN)
72 {
73 continue;
74 }
75
76
77 if (fds[index].fd == sfd)
78 {
79 newfd = accept(sfd,(struct sockaddr *)&cin,&socklen);
80 PERROR_INFO(newfd);
81
82 printf("[%s:%d] :is connect\n",inet_ntoa(cin.sin_addr),ntohs(cin.sin_port));
83 count++;
84 fds[count-1].fd = newfd;
85 fds[count-1].events = POLLIN;
86 cins[newfd] = cin;
87
88 }
89 else if (fds[index].fd == 0)
90 {
91
92 scanf("%s",buf);
93 printf("get message is %s\n",buf);
94
95 for (int i = 2;i <count ;i++ )
96 {
97 send(fds[i].fd,buf,sizeof(buf),0);
98 }
99
100 }
101 else
102 {
103 bzero(rbuf,sizeof(rbuf));
104 ret = recv(fds[index].fd,rbuf,sizeof(rbuf),0);
105
106 if (ret == 0)
107 {
108 printf("client is offline!!!\n");
109 close(fds[index].fd);
110 for (int i = index;i < count-2 ;i++ )
111 {
112 fds[i] = fds[i+1];
113 }
114 count--;
115 index--;
116 continue;
117 }
118 printf("[%s:%d] :recive message is %s\n",inet_ntoa(cins[fds[index].fd].sin_addr),ntohs(cins[fds[index].fd].sin_port),rbuf);
119 //printf("recive message is %s\n",rbuf);
120 strcat(rbuf,"*_*");
121 send(fds[index].fd,rbuf,sizeof(rbuf),0);
122
123 }
124
125 }
126 }
127 close(sfd);
128
129 return 0;
130 }
~
~
~ 思维导图
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