UDP Broadcast sunucu – istemci
Sunucu:
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| #include <stdio.h> | |
| #include <string.h> | |
| #include <sys/types.h> | |
| #include <sys/socket.h> | |
| #include <netinet/in.h> | |
| #define MY_PORT 3333 | |
| int main(int argc, char *argv[]) | |
| { | |
| int sockfd, new_fd; | |
| struct sockaddr_in my_addr; // hedef adres | |
| struct sockaddr_in their_addr; // baglanti yapan adres | |
| int sin_size, rt; | |
| // gelen verinin tutuldugu buffer | |
| char buf[32]; | |
| // islem yapmak icin gerekli dosya gosterici | |
| sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
| sin_size = sizeof(struct sockaddr_in); | |
| // adres ile ilgili ayarlar | |
| my_addr.sin_family = AF_INET; | |
| my_addr.sin_port = htons(MY_PORT); // kullanilacak port | |
| my_addr.sin_addr.s_addr = INADDR_ANY; // mevcut ip adresi | |
| memset(&(my_addr.sin_zero), 0, 8); // geri kalani 0la | |
| // socket ile dosyayi iliskilendir | |
| bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)); | |
| while ( 1 ) { | |
| rt = recvfrom (sockfd, buf, 12, 0, (struct sockaddr *)&their_addr, &sin_size); | |
| if (rt > 0) { | |
| printf ("recv: %s\n", buf); | |
| } else if (rt < 0) { | |
| printf("Baglanti koptu\n"); | |
| break; | |
| } | |
| } | |
| close(sockfd); | |
| return 0; | |
| } |
by İstemci:
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| #include <stdio.h> | |
| #include <string.h> | |
| #include <sys/types.h> | |
| #include <sys/socket.h> | |
| #include <netinet/in.h> | |
| #define DEST_IP "255.255.255.255" | |
| #define DEST_PORT 3333 | |
| int main(int argc, char *argv[]) | |
| { | |
| int sockfd, new_fd; | |
| struct sockaddr_in dest_addr; // hedef adres | |
| int sin_size, rt; | |
| sin_size = sizeof(struct sockaddr_in); | |
| // islem yapmak icin gerekli dosya gosterici | |
| sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
| // adres ile ilgili ayarlar | |
| dest_addr.sin_family = AF_INET; | |
| dest_addr.sin_port = htons(DEST_PORT); | |
| dest_addr.sin_addr.s_addr = inet_addr(DEST_IP); | |
| memset(&(dest_addr.sin_zero), 0, 8); // geri kalani 0 la | |
| // Broadcast icin gerekli yetkiyi al | |
| int flag = 1; | |
| if (setsockopt (sockfd, SOL_SOCKET, SO_BROADCAST, &flag, sizeof(flag)) < 0) | |
| perror("setsockopt"); | |
| // mesaji gonder | |
| rt = sendto (sockfd, "slm asl plz", 12, 0, (const struct sockaddr *)&dest_addr, sin_size); | |
| if ( rt < 0 ) | |
| perror("Hata: "); | |
| // socketi kapat | |
| close(sockfd); | |
| return 0; | |
| } |