| 1 | #include <errno.h> |
| 2 | #include <fcntl.h> |
| 3 | #include <netinet/in.h> |
| 4 | #include <signal.h> |
| 5 | #include <stdio.h> |
| 6 | #include <stdlib.h> |
| 7 | #include <sys/sendfile.h> |
| 8 | #include <sys/socket.h> |
| 9 | #include <sys/time.h> |
| 10 | #include <sys/types.h> |
| 11 | #include <unistd.h> |
| 12 | |
| 13 | static int error(const char *n) |
| 14 | { |
| 15 | perror(n); |
| 16 | return -1; |
| 17 | } |
| 18 | |
| 19 | static int parent(int listen_sk) |
| 20 | { |
| 21 | unsigned long received; |
| 22 | struct sockaddr addr; |
| 23 | unsigned int len = sizeof(addr); |
| 24 | int sk; |
| 25 | |
| 26 | again: |
| 27 | sk = accept(listen_sk, &addr, &len); |
| 28 | if (sk < 0) |
| 29 | return error("accept"); |
| 30 | |
| 31 | /* read forever */ |
| 32 | received = 0; |
| 33 | for (;;) { |
| 34 | int ret = recv(sk, NULL, 128*1024*1024, MSG_TRUNC); |
| 35 | if (ret > 0) { |
| 36 | received += ret; |
| 37 | continue; |
| 38 | } |
| 39 | if (!ret) |
| 40 | break; |
| 41 | if (errno == EAGAIN || errno == EINTR) |
| 42 | continue; |
| 43 | break; |
| 44 | } |
| 45 | |
| 46 | printf("Received %f MB of data\n", (double) received / (1024*1024)); |
| 47 | close(sk); |
| 48 | goto again; |
| 49 | } |
| 50 | |
| 51 | int main(__attribute__((__unused__)) int argc, __attribute__((__unused__)) char **argv) |
| 52 | { |
| 53 | struct sockaddr_in saddr_in; |
| 54 | struct sockaddr addr; |
| 55 | unsigned int len; |
| 56 | int sk; |
| 57 | |
| 58 | signal(SIGCHLD, SIG_IGN); |
| 59 | sk = socket(PF_INET, SOCK_STREAM, 0); |
| 60 | if (sk < 0) { |
| 61 | perror("socket"); |
| 62 | exit(1); |
| 63 | } |
| 64 | saddr_in.sin_addr.s_addr = htonl(INADDR_ANY); |
| 65 | saddr_in.sin_port = htons(1111); |
| 66 | |
| 67 | if (bind(sk, (struct sockaddr*)&saddr_in, sizeof(saddr_in)) < 0) { |
| 68 | fprintf(stderr,"bind failed\n"); |
| 69 | exit(1); |
| 70 | } |
| 71 | |
| 72 | if (listen(sk, 1) < 0) { |
| 73 | perror("listen"); |
| 74 | exit(1); |
| 75 | } |
| 76 | len = sizeof(addr); |
| 77 | if (getsockname(sk, &addr, &len) < 0) { |
| 78 | perror("getsockname"); |
| 79 | exit(1); |
| 80 | } |
| 81 | return parent(sk); |
| 82 | } |