1 #include <sys/socket.h>
8 #ifndef SO_MAX_PACING_RATE
9 #define SO_MAX_PACING_RATE 47
12 UDPStream::UDPStream(const sockaddr_in6 &dst, uint32_t pacing_rate, int ttl)
15 sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
17 // Oops. Ignore this output, then.
22 if (setsockopt(sock, SOL_SOCKET, SO_MAX_PACING_RATE, &pacing_rate, sizeof(pacing_rate)) == -1) {
23 if (pacing_rate != ~0U) {
24 log_perror("setsockopt(SO_MAX_PACING_RATE)");
29 // Seemingly the IPv4 parameters are used for sending to IPv4,
30 // even on an AF_INET6 socket, so we need to set both.
31 if (setsockopt(sock, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl)) == -1) {
32 log_perror("setsockopt(IP_TTL)");
34 if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) == -1) {
35 log_perror("setsockopt(IP_MULTICAST_TTL)");
37 if (setsockopt(sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)) == -1) {
38 log_perror("setsockopt(IPV6_UNICAST_HOPS)");
40 if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl)) == -1) {
41 log_perror("setsockopt(IPV6_MULTICAST_HOPS)");
46 UDPStream::~UDPStream()
53 void UDPStream::send(const char *data, size_t bytes)
58 ssize_t err = sendto(sock, data, bytes, 0, reinterpret_cast<sockaddr *>(&dst), sizeof(dst));