UDP 聊天室 .

来源：互联网发布：西安交大网络导航编辑：程序博客网时间：2024/05/20 21:19

学过Socket编程，连个UDP聊天室也没写过实在是说不过去了。写个简单的聊天室。客户端通过向服务器发送数据进行对话。所有信息在服务端显示。

运行效果：

服务端：

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[fsy@localhost my_socket]$ ./udps
create socket.
bind address to socket.
fsy said: i'm coming~
saosao123 said: leave me alone
fsy said: come baby
saosao123 said: who r u ?
fsy said: just guess~
Teacher said: shut up u guys

[fsy@localhost my_socket]$ ./udpscreate socket.bind address to socket.fsy said: i'm coming~saosao123 said: leave me alonefsy said: come babysaosao123 said: who r u ?fsy said: just guess~Teacher said: shut up u guys

客户端：

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[fsy@localhost my_socket]$ ./udpc 192.168.189.13 saosao123
create socket.
Welcome Mr. saosao123!
leave me alone
who r u ?

[fsy@localhost my_socket]$ ./udpc 192.168.189.13 saosao123create socket.Welcome Mr. saosao123!leave me alonewho r u ?

服务端程序：

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include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <errno.h>
#include <stdlib.h>
#include <arpa/inet.h>
int main(int argc, char **argv){
struct sockaddr_in s_addr,c_addr;
int sock;
socklen_t addr_len;
int len;
char buff[128];
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
perror("socket");
exit(errno);
} else
printf("create socket.\n\r");
memset(&s_addr, 0, sizeof(struct sockaddr_in));
s_addr.sin_family = AF_INET;
s_addr.sin_port = htons(7838);
s_addr.sin_addr.s_addr = INADDR_ANY;
if ((bind(sock, (struct sockaddr *) &s_addr, sizeof(s_addr))) == -1) {
perror("bind");
exit(errno);
} else
printf("bind address to socket.\n\r");
addr_len = sizeof(c_addr);
while (1) {
len = recvfrom(sock, buff, sizeof(buff) - 1, 0, (struct sockaddr *) &c_addr, &addr_len);
if (len < 0) {
perror("recvfrom");
exit(errno);
}
buff[len] = '\0';
printf("%s\n", buff);
}
return 0;
}

include <stdio.h>#include <string.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#include <errno.h>#include <stdlib.h>#include <arpa/inet.h>int main(int argc, char **argv){    struct sockaddr_in s_addr,c_addr;    int sock;    socklen_t addr_len;    int len;    char buff[128];    if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {        perror("socket");        exit(errno);    } else        printf("create socket.\n\r");    memset(&s_addr, 0, sizeof(struct sockaddr_in));    s_addr.sin_family = AF_INET;    s_addr.sin_port = htons(7838);    s_addr.sin_addr.s_addr = INADDR_ANY;    if ((bind(sock, (struct sockaddr *) &s_addr, sizeof(s_addr))) == -1) {        perror("bind");        exit(errno);    } else        printf("bind address to socket.\n\r");    addr_len = sizeof(c_addr);    while (1) {        len = recvfrom(sock, buff, sizeof(buff) - 1, 0, (struct sockaddr *) &c_addr, &addr_len);        if (len < 0) {            perror("recvfrom");            exit(errno);        }        buff[len] = '\0';        printf("%s\n", buff);    }    return 0;}

客户端程序：

[cpp] view plaincopyprint?

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <errno.h>
#include <stdlib.h>
#include <arpa/inet.h>
int main(int argc, char **argv){
struct sockaddr_in s_addr;
int sock;
int addr_len;
int len;
char buff[128];
char message[128];
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
perror("socket");
exit(errno);
} else
printf("create socket.\n\r");
s_addr.sin_family = AF_INET;
s_addr.sin_port = htons(7838);
if (argc==3){
s_addr.sin_addr.s_addr = inet_addr(argv[1]);
}
else {
printf("Usage: %s <server ip> <UserName>!\n");
exit(0);
}
printf("Welcome Mr. %s!\n",argv[2]);
while(1){
memset(buff,0,sizeof(buff));
memset(message,0,sizeof(message));
//这里为了连接字符串又弄了一个buff,应该有更好的办法，望路过的高手赐教
strcpy(buff,argv[2]);
strcat(buff," said: ");
fgets(message,128,stdin);
strcat(buff,message);
addr_len = sizeof(s_addr);
len = sendto(sock, buff, strlen(buff), 0, (struct sockaddr *) &s_addr, addr_len);
if (len < 0) {
printf("\n\rsend error.\n\r");
return 1;
}
}
return 0;
}

#include <stdio.h>#include <string.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#include <errno.h>#include <stdlib.h>#include <arpa/inet.h>int main(int argc, char **argv){    struct sockaddr_in s_addr;    int sock;    int addr_len;    int len;    char buff[128];    char message[128];    if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {        perror("socket");        exit(errno);    } else        printf("create socket.\n\r");    s_addr.sin_family = AF_INET;    s_addr.sin_port = htons(7838);    if (argc==3){        s_addr.sin_addr.s_addr = inet_addr(argv[1]);    }    else {        printf("Usage: %s <server ip> <UserName>!\n");        exit(0);    }    printf("Welcome Mr. %s!\n",argv[2]);    while(1){        memset(buff,0,sizeof(buff));        memset(message,0,sizeof(message));        //这里为了连接字符串又弄了一个buff,应该有更好的办法，望路过的高手赐教        strcpy(buff,argv[2]);        strcat(buff," said: ");        fgets(message,128,stdin);        strcat(buff,message);        addr_len = sizeof(s_addr);        len = sendto(sock, buff, strlen(buff), 0, (struct sockaddr *) &s_addr, addr_len);        if (len < 0) {            printf("\n\rsend error.\n\r");            return 1;        }    }    return 0;}

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