63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <netinet/in.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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/* rozmiar bufora */
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#define BUFFER_SIZE 30000
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/* liczba powtorzen */
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#define ATTEMPTS 100
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char buf[BUFFER_SIZE];
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/*
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argv[1] - numer portu
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*/
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int main(int argc, char **argv)
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{
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struct sockaddr_in myaddr, endpoint;
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int sdsocket, sdconnection, addrlen, received;
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if (argc < 2) {
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printf("podaj numer portu jako parametr\n");
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return 1;
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}
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sdsocket = socket(AF_INET, SOCK_DGRAM, 0);
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addrlen = sizeof(struct sockaddr_in);
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myaddr.sin_family = AF_INET;
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myaddr.sin_port = htons(atoi(argv[1]));
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myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
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if (bind(sdsocket,(struct sockaddr*) &myaddr,addrlen) < 0) {
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printf("bind() nie powiodl sie\n");
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return 1;
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}
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received = 0;
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while(1) {
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/* odbior moze odbywac sie w mniejszych
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segmentach */
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while (received < BUFFER_SIZE)
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{
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received += recvfrom(sdsocket,
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buf+received,
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BUFFER_SIZE-received,
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0,
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(struct sockaddr*) &endpoint,
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&addrlen);
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}
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sendto(sdsocket, buf, BUFFER_SIZE, 0, (struct sockaddr*) &endpoint, addrlen);
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}
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return 0;
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} |