74 lines
1.3 KiB
C++
74 lines
1.3 KiB
C++
// RUN: %clangxx -O0 -g %s -o %t && %run %t
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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int main(void) {
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int child;
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int fd, sfd;
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socklen_t len;
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struct sockaddr_in server = {}, client = {};
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sigset_t set;
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child = fork();
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if (child == 0) {
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fd = socket(AF_INET, SOCK_STREAM, 0);
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if (fd == -1)
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_exit(1);
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server.sin_family = AF_INET;
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server.sin_addr.s_addr = INADDR_ANY;
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server.sin_port = htons(2222);
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if (connect(fd, (struct sockaddr *)&server, sizeof(server)) == -1)
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_exit(1);
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close(fd);
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_exit(0);
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}
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fd = socket(AF_INET, SOCK_STREAM, 0);
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if (fd == -1) {
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kill(child, SIGKILL);
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wait(NULL);
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exit(1);
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}
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server.sin_family = AF_INET;
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server.sin_addr.s_addr = INADDR_ANY;
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server.sin_port = htons(2222);
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if (bind(fd, (const struct sockaddr *)&server, sizeof(server)) == -1) {
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kill(child, SIGKILL);
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wait(NULL);
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exit(1);
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}
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listen(fd, 3);
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if (sigemptyset(&set) == -1) {
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kill(child, SIGKILL);
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wait(NULL);
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exit(1);
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}
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len = sizeof(client);
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sfd = paccept(fd, (struct sockaddr *)&client, &len, &set, SOCK_NONBLOCK);
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if (sfd == -1) {
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kill(child, SIGKILL);
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wait(NULL);
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exit(1);
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}
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wait(NULL);
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close(sfd);
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close(fd);
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return 0;
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}
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