#include "timeval.h"
#include "configuration.h"
-/** @brief Bytes to send per network packet
- *
- * This is the maximum number of bytes we pass to write(2); to determine actual
- * packet sizes, add a UDP header and an IP header (and a link layer header if
- * it's the link layer size you care about).
- *
- * Don't make this too big or arithmetic will start to overflow.
- */
-#define NETWORK_BYTES (1500-8/*UDP*/-40/*IP*/-8/*conservatism*/)
+/** @brief Bytes to send per network packet */
+static int rtp_max_payload;
/** @brief RTP payload type */
static int rtp_payload;
"multicast-ttl",
"multicast-loop",
"rtp-mode",
+ "rtp-max-payload",
+ "rtp-mtu-discovery",
NULL
};
static const int one = 1;
struct netaddress dst[1], src[1];
const char *mode;
+#ifdef IP_MTU_DISCOVER
+ const char *mtu_disc;
+ int opt;
+#endif
/* Get the mode */
mode = uaudio_get("rtp-mode", "auto");
rtp_mode = RTP_UNICAST;
}
}
+ rtp_max_payload = atoi(uaudio_get("rtp-max-payload", "-1"));
+ if(rtp_max_payload < 0)
+ rtp_max_payload = 1500 - 8/*UDP*/ - 40/*IP*/ - 8/*conservatism*/;
/* Create the sockets */
if(rtp_mode != RTP_REQUEST) {
if((rtp_fd = socket(dres->ai_family,
disorder_fatal(errno, "error connecting broadcast socket to %s",
format_sockaddr(dres->ai_addr));
}
+#ifdef IP_MTU_DISCOVER
+ mtu_disc = uaudio_get("rtp-mtu-discovery", "default");
+ do {
+ if(!strcmp(mtu_disc, "yes")) opt = IP_PMTUDISC_DO;
+ else if(!strcmp(mtu_disc, "no")) opt = IP_PMTUDISC_DONT;
+ else break;
+ if(setsockopt(rtp_fd4, IPPROTO_IP, IP_MTU_DISCOVER, &opt, sizeof opt))
+ disorder_fatal(errno, "error setting MTU discovery");
+ if(sres->ai_family == AF_INET &&
+ setsockopt(rtp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &opt, sizeof opt))
+ disorder_fatal(errno, "error setting MTU discovery");
+ } while (0);
+#endif
if(config->rtp_verbose)
disorder_info("RTP: prepared socket");
}
userdata,
rtp_play,
256 / uaudio_sample_size,
- (NETWORK_BYTES - sizeof(struct rtp_header))
+ (rtp_max_payload - sizeof(struct rtp_header))
/ uaudio_sample_size,
0);
if(config->rtp_verbose)
snprintf(buffer, sizeof buffer, "%ld", config->multicast_ttl);
uaudio_set("multicast-ttl", buffer);
uaudio_set("multicast-loop", config->multicast_loop ? "yes" : "no");
+ snprintf(buffer, sizeof buffer, "%ld", config->rtp_max_payload);
+ uaudio_set("rtp-max-payload", buffer);
+ uaudio_set("rtp-mtu-discovery", config->rtp_mtu_discovery);
if(config->rtp_verbose)
disorder_info("RTP: configured");
}