其他

day5/weak_task/t5.c

@@ -0,0 +1,43 @@
+// a->客户端
+#include <stdio.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+int main(int argc, char const *argv[])
+{
+    int a_fd = socket(AF_INET, SOCK_DGRAM, 0);
+    if (a_fd < 0)
+    {
+        perror("socket");
+        return 1;
+    }
+
+    struct sockaddr_in addr;
+    bzero(&addr, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(8000);
+    addr.sin_addr.s_addr = inet_addr("127.0.0.1"); // 服务器在本地
+
+    while (1)
+    {
+        char buf[1] = "";
+        bzero(&buf, sizeof(buf));
+        scanf("%s", buf);
+        sendto(a_fd, buf, strlen(buf), 0, (struct sockaddr *)&addr, sizeof(addr));
+
+        char recvbuf[128] = "";
+        socklen_t addr_len = sizeof(addr);
+        recvfrom(a_fd, recvbuf, strlen(recvbuf), 0, (struct sockaddr *)&addr, &addr_len);
+        printf("%s", recvbuf);
+
+        if (strncmp(recvbuf, "bye", 3) == 0)
+            break;
+    }
+
+    close(a_fd);
+
+    return 0;
+}

day5/weak_task/t5_a.c

@@ -0,0 +1,42 @@
+// a->客户端
+#include <stdio.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+int main(int argc, char const *argv[])
+{
+    int a_fd = socket(AF_INET, SOCK_DGRAM, 0);
+    if (a_fd < 0)
+    {
+        perror("socket");
+        return 1;
+    }
+
+    struct sockaddr_in addr;
+    bzero(&addr, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(8000);
+    addr.sin_addr.s_addr = inet_addr("127.0.0.1"); // 服务器在本地
+
+    while (1)
+    {
+        int n = 0;
+        scanf("%d", &n);
+        sendto(a_fd, &n, sizeof(n), 0, (struct sockaddr *)&addr, sizeof(addr));
+
+        char recvbuf[128] = "";
+        socklen_t addr_len = sizeof(addr);
+        recvfrom(a_fd, recvbuf, strlen(recvbuf), 0, (struct sockaddr *)&addr, &addr_len);
+        printf("%s", recvbuf);
+
+        if (strncmp(recvbuf, "bye", 3) == 0)
+            break;
+    }
+
+    close(a_fd);
+
+    return 0;
+}

day5/weak_task/t5_b.c

@@ -0,0 +1,54 @@
+// b->服务端
+#include <stdio.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+int main(int argc, char const *argv[])
+{
+    int b_fd = socket(AF_INET, SOCK_DGRAM, 0);
+    if (b_fd < 0)
+    {
+        perror("socket");
+        return 1;
+    }
+
+    struct sockaddr_in addr;
+    bzero(&addr, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(8000);
+    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
+    // addr.sin_addr.s_addr = inet_addr("127.0.0.1");
+    bind(b_fd, (struct sockaddr *)&addr, sizeof(addr));
+
+    while (1)
+    {
+        struct sockaddr_in src_addr;
+        bzero(&src_addr, sizeof(src_addr));
+        socklen_t src_addr_len = sizeof(src_addr);
+        int n;
+        socklen_t addr_len = sizeof(addr);
+        recvfrom(b_fd, &n, sizeof(n), 0, (struct sockaddr *)&src_addr, &src_addr_len);
+        printf("%d", n);
+
+        char sendbuf[128] = "";
+
+        if (n == 1)
+            strcpy(sendbuf, "disen666");
+        else if (n == 2)
+            strcpy(sendbuf, "jack good");
+        else if (n == 3)
+            strcpy(sendbuf, "disen888");
+        else if (n == 4)
+            strcpy(sendbuf, "bye");
+
+        sendto(b_fd, sendbuf, strlen(sendbuf), 0, (struct sockaddr *)&src_addr, src_addr_len);
+    }
+
+    close(b_fd);
+
+    return 0;
+}