55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
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// b->服务端
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#include <stdio.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <stdlib.h>
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int main(int argc, char const *argv[])
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{
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int b_fd = socket(AF_INET, SOCK_DGRAM, 0);
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if (b_fd < 0)
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{
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perror("socket");
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return 1;
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}
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struct sockaddr_in addr;
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bzero(&addr, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_port = htons(8000);
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addr.sin_addr.s_addr = htonl(INADDR_ANY); // 接收所有本地ip下同一网段的客户端消息
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// addr.sin_addr.s_addr = inet_addr("127.0.0.1");
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bind(b_fd, (struct sockaddr *)&addr, sizeof(addr));
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while (1)
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{
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struct sockaddr_in src_addr;
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bzero(&src_addr, sizeof(src_addr));
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socklen_t src_addr_len = sizeof(src_addr);
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int n;
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socklen_t addr_len = sizeof(addr);
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recvfrom(b_fd, &n, sizeof(n), 0, (struct sockaddr *)&src_addr, &src_addr_len);
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printf("%d", n);
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char sendbuf[128] = "";
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if (n == 1)
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strcpy(sendbuf, "disen666");
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else if (n == 2)
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strcpy(sendbuf, "jack good");
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else if (n == 3)
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strcpy(sendbuf, "disen888");
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else if (n == 4)
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strcpy(sendbuf, "bye");
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sendto(b_fd, sendbuf, strlen(sendbuf), 0, (struct sockaddr *)&src_addr, src_addr_len);
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}
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close(b_fd);
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return 0;
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}
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