*/
/** \file udp_recv.c Paraslash's udp receiver */
+#include <regex.h>
#include <dirent.h>
+#include <sys/socket.h>
+#include <net/if.h>
#include "para.h"
+#include "error.h"
#include "portable_io.h"
-#include "udp_header.h"
#include "list.h"
#include "sched.h"
#include "ggo.h"
#include "recv.h"
#include "udp_recv.cmdline.h"
-#include "error.h"
#include "audiod.h"
#include "string.h"
#include "net.h"
/** The size of the receiver node buffer. */
#define UDP_RECV_CHUNK_SIZE (128 * 1024)
-
/**
* Data specific to the udp receiver.
*
* \sa \ref receiver, \ref receiver_node.
*/
struct private_udp_recv_data {
- /**
- * Whether a header was received.
- *
- * A flag indicating whether this receiver already received a packet
- * which contains the audio file header.
- *
- * This flag has no effect if the audio stream indicates that no extra
- * headers will be sent (mp3, aac). Otherwise, all data packets are
- * dropped until the header is received.
- */
- int have_header;
/** The socket file descriptor. */
int fd;
};
para_fd_set(purd->fd, &s->rfds, &s->max_fileno);
}
-static int enough_space(size_t packet_size, size_t loaded)
+static int enough_space(size_t nbytes, size_t loaded)
{
- return packet_size + loaded < UDP_RECV_CHUNK_SIZE + UDP_AUDIO_HEADER_LEN;
+ return nbytes + loaded < UDP_RECV_CHUNK_SIZE;
+}
+
+static int add_rn_output(struct receiver_node *rn, char *buf, size_t len)
+{
+ if (!len)
+ return 1;
+ if (!enough_space(len, rn->loaded))
+ return -E_UDP_OVERRUN;
+ memcpy(rn->buf + rn->loaded, buf, len);
+ rn->loaded += len;
+ return 1;
}
static void udp_recv_post_select(__a_unused struct sched *s, struct task *t)
int ret;
char tmpbuf[UDP_RECV_CHUNK_SIZE];
size_t packet_size;
- uint8_t stream_type, packet_type;
if (rn->output_error && *rn->output_error < 0) {
t->error = *rn->output_error;
return;
ret = recv_bin_buffer(purd->fd, tmpbuf, UDP_RECV_CHUNK_SIZE);
if (ret < 0) {
- t->error = 0;
- if (errno != EINTR && errno != EAGAIN)
- t->error = -ERRNO_TO_PARA_ERROR(errno);
- return;
- }
- packet_size = ret;
- if (packet_size < UDP_AUDIO_HEADER_LEN) {
- t->error = -E_UDP_SHORT_PACKET; /* FIXME: We shouldn't fail here */
- return;
- }
- if (udp_check_magic(tmpbuf, packet_size) < 0) {
- t->error = -E_UDP_NO_MAGIC;
+ if (is_errno(ret, EINTR) || is_errno(ret, EAGAIN))
+ goto success;
+ t->error = ret;
return;
}
- stream_type = udp_read_stream_type(tmpbuf);
- packet_type = udp_read_packet_type(tmpbuf);
-// PARA_INFO_LOG("packet type: %d, stream type: %d,"
-// " loaded: %u\n", packet_type,
-// (unsigned) stream_type, rn->loaded);
- switch (packet_type) {
- uint16_t header_len, payload_len;
- case UDP_EOF_PACKET:
- t->error = -E_RECV_EOF;
+ t->error = -E_RECV_EOF;
+ if (!ret)
return;
- case UDP_BOF_PACKET:
- PARA_INFO_LOG("bof (%zu)\n", packet_size);
- purd->have_header = 1;
- /* fall through */
- case UDP_DATA_PACKET:
- if (!purd->have_header && stream_type == UDP_HEADER_STREAM)
- /* can't use the data, wait for header */
- goto success;
- if (!enough_space(packet_size, rn->loaded)) {
- t->error = -E_OVERRUN;
- return;
- }
- if (packet_size > UDP_AUDIO_HEADER_LEN) {
- memcpy(rn->buf + rn->loaded, tmpbuf + UDP_AUDIO_HEADER_LEN,
- packet_size - UDP_AUDIO_HEADER_LEN);
- rn->loaded += packet_size - UDP_AUDIO_HEADER_LEN;
- }
- goto success;
- case UDP_HEADER_PACKET:
- if (!enough_space(packet_size, rn->loaded)) {
- t->error = -E_OVERRUN;
- return;
- }
- header_len = udp_read_header_len(tmpbuf);
- if (header_len + UDP_AUDIO_HEADER_LEN > packet_size) {
- t->error = -E_INVALID_HEADER;
- return;
- }
-// PARA_DEBUG_LOG("header packet (%zu bytes), header len: %d\n",
-// packet_size, header_len);
- if (!purd->have_header) {
- purd->have_header = 1;
- rn->loaded = header_len;
- memcpy(rn->buf, tmpbuf + UDP_AUDIO_HEADER_LEN,
- rn->loaded);
-// sleep(1);
- goto success;
- }
- payload_len = packet_size - UDP_AUDIO_HEADER_LEN - header_len;
- if (rn->loaded + payload_len > UDP_RECV_CHUNK_SIZE) {
- t->error = -E_OVERRUN;
+ packet_size = ret;
+ if (packet_size >= FEC_EOF_PACKET_LEN)
+ if (!memcmp(tmpbuf, FEC_EOF_PACKET, FEC_EOF_PACKET_LEN))
return;
- }
- if (payload_len)
- memcpy(rn->buf + rn->loaded, tmpbuf
- + (packet_size - payload_len), payload_len);
- rn->loaded += payload_len;
- }
+ t->error = add_rn_output(rn, tmpbuf, packet_size);
+ if (t->error < 0)
+ return;
success:
- t->error = 0;
+ t->error = 1;
}
static void udp_shutdown(void)
return NULL;
}
+/*
+ * Perform AF-independent joining of multicast receive addresses.
+ *
+ * \param fd Bound socket descriptor.
+ * \param iface The receiving multicast interface, or NULL for the default.
+ *
+ * \return Zero if okay, negative on error.
+ */
+static int mcast_receiver_setup(int fd, const char *iface)
+{
+ struct sockaddr_storage ss;
+ socklen_t sslen = sizeof(ss);
+ int id = iface == NULL ? 0 : if_nametoindex(iface);
+
+ if (getsockname(fd, (struct sockaddr *)&ss, &sslen) < 0)
+ goto err;
+
+ if (iface != NULL && id == 0)
+ PARA_WARNING_LOG("could not resolve interface %s, using default", iface);
+
+ switch (ss.ss_family) {
+ case AF_INET:
+ if (IN_MULTICAST(htonl(((struct sockaddr_in *)&ss)->sin_addr.s_addr))) {
+#ifdef HAVE_IP_MREQN
+ struct ip_mreqn m4;
+
+ m4.imr_address.s_addr = INADDR_ANY;
+ m4.imr_ifindex = id;
+#else
+ struct ip_mreq m4;
+
+ m4.imr_interface.s_addr = INADDR_ANY;
+ if (id != 0)
+ PARA_ERROR_LOG("Setting IPv4 receiver mcast interface not supported.");
+
+#endif
+ m4.imr_multiaddr = ((struct sockaddr_in *)&ss)->sin_addr;
+
+ if (setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &m4, sizeof(m4)) < 0)
+ break;
+ }
+ return 0;
+ case AF_INET6:
+ if (IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)&ss)->sin6_addr)) {
+ struct ipv6_mreq m6;
+
+ memset(&m6, 0, sizeof(m6));
+ memcpy(&m6.ipv6mr_multiaddr, &((struct sockaddr_in6 *)&ss)->sin6_addr, 16);
+ m6.ipv6mr_interface = id;
+ if (setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &m6, sizeof(m6)) < 0)
+ break;
+ }
+ return 0;
+ default:
+ PARA_ERROR_LOG("address family %d not supported", ss.ss_family);
+ return -E_ADDRESS_LOOKUP;
+ }
+err:
+ return -ERRNO_TO_PARA_ERROR(errno);
+}
+
static int udp_recv_open(struct receiver_node *rn)
{
struct private_udp_recv_data *purd;
struct udp_recv_args_info *c = rn->conf;
+ char *iface = c->iface_given ? c->iface_arg : NULL;
int ret;
rn->buf = para_calloc(UDP_RECV_CHUNK_SIZE);
rn->private_data = para_calloc(sizeof(struct private_udp_recv_data));
purd = rn->private_data;
- ret = create_udp_recv_socket(c->host_arg, c->port_arg);
+
+ ret = makesock(AF_UNSPEC, IPPROTO_UDP, 1, c->host_arg, c->port_arg);
if (ret < 0)
- return ret;
+ goto err;
purd->fd = ret;
+
+ ret = mcast_receiver_setup(purd->fd, iface);
+ if (ret < 0) {
+ close(purd->fd);
+ return ret;
+ }
+
ret = mark_fd_nonblocking(purd->fd);
if (ret < 0)
- return ret;
+ goto err;
PARA_NOTICE_LOG("receiving from %s:%d, fd=%d\n", c->host_arg,
c->port_arg, purd->fd);
return purd->fd;
+err:
+ free(rn->private_data);
+ free(rn->buf);
+ return ret;
}
/**
.short_help = udp_recv_args_info_help,
.detailed_help = udp_recv_args_info_detailed_help
};
+ udp_recv_cmdline_parser_free(&dummy);
}
projects / paraslash.git / blobdiff