X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=udp_recv.c;h=c1f238308b58bab556434f57171be30db92944f2;hp=2657beec952059a58cac468f02d0dc2d3350777c;hb=d0d27cfa56d05eaa0e5567c75adfe606eab2957e;hpb=e7e55d0ad711a46e4768066be197bb41caa5c5eb diff --git a/udp_recv.c b/udp_recv.c index 2657beec..c1f23830 100644 --- a/udp_recv.c +++ b/udp_recv.c @@ -1,12 +1,11 @@ /* - * Copyright (C) 2005-2009 Andre Noll + * Copyright (C) 2005-2012 Andre Noll * * Licensed under the GPL v2. For licencing details see COPYING. */ /** \file udp_recv.c Paraslash's udp receiver */ #include -#include #include #include @@ -23,78 +22,78 @@ #include "fd.h" #include "buffer_tree.h" -/** - * Data specific to the udp receiver. - * - * \sa \ref receiver, \ref receiver_node. - */ -struct private_udp_recv_data { - /** The socket file descriptor. */ - int fd; - struct btr_pool *btrp; -}; - static void udp_recv_pre_select(struct sched *s, struct task *t) { struct receiver_node *rn = container_of(t, struct receiver_node, task); - struct private_udp_recv_data *purd = rn->private_data; if (generic_recv_pre_select(s, t) <= 0) return; - para_fd_set(purd->fd, &s->rfds, &s->max_fileno); + para_fd_set(rn->fd, &s->rfds, &s->max_fileno); +} + +static int udp_check_eof(size_t sz, struct iovec iov[2]) +{ + if (sz < FEC_EOF_PACKET_LEN) + return 0; + if (iov[0].iov_len >= FEC_EOF_PACKET_LEN) { + if (memcmp(iov[0].iov_base, FEC_EOF_PACKET, + FEC_EOF_PACKET_LEN) != 0) + return 0; + return -E_RECV_EOF; + } + if (memcmp(iov[0].iov_base, FEC_EOF_PACKET, iov[0].iov_len) != 0) + return 0; + if (memcmp(iov[1].iov_base, FEC_EOF_PACKET + iov[0].iov_len, + FEC_EOF_PACKET_LEN - iov[0].iov_len) != 0) + return 0; + return -E_RECV_EOF; } static void udp_recv_post_select(__a_unused struct sched *s, struct task *t) { struct receiver_node *rn = container_of(t, struct receiver_node, task); - struct private_udp_recv_data *purd = rn->private_data; struct btr_node *btrn = rn->btrn; - int ret; - char *buf = NULL; - size_t packet_size, bufsize; + size_t num_bytes; + struct iovec iov[2]; + int ret, readv_ret, iovcnt; t->error = 0; ret = btr_node_status(btrn, 0, BTR_NT_ROOT); - if (ret < 0) - goto err; - if (ret == 0) - return; - if (!FD_ISSET(purd->fd, &s->rfds)) - return; - bufsize = btr_pool_get_buffer(purd->btrp, &buf); + if (ret <= 0) + goto out; + iovcnt = btr_pool_get_buffers(rn->btrp, iov); ret = -E_UDP_OVERRUN; - if (bufsize == 0) - goto err; - ret = recv_bin_buffer(purd->fd, buf, bufsize); - if (ret == 0) - ret = -E_RECV_EOF; + if (iovcnt == 0) + goto out; + ret = readv_nonblock(rn->fd, iov, iovcnt, &s->rfds, &num_bytes); + if (num_bytes == 0) + goto out; + readv_ret = ret; + ret = udp_check_eof(num_bytes, iov); if (ret < 0) - goto err; - packet_size = ret; - if (packet_size >= FEC_EOF_PACKET_LEN) { - if (!memcmp(buf, FEC_EOF_PACKET, FEC_EOF_PACKET_LEN)) { - PARA_INFO_LOG("received eof packet\n"); - ret = -E_RECV_EOF; - goto err; - } + goto out; + if (iov[0].iov_len >= num_bytes) + btr_add_output_pool(rn->btrp, num_bytes, btrn); + else { /* both buffers contain data */ + btr_add_output_pool(rn->btrp, iov[0].iov_len, btrn); + btr_add_output_pool(rn->btrp, num_bytes - iov[0].iov_len, + btrn); } - btr_add_output_pool(purd->btrp, packet_size, btrn); - return; -err: + ret = readv_ret; +out: + if (ret >= 0) + return; btr_remove_node(btrn); t->error = ret; - close(purd->fd); - purd->fd = -1; + close(rn->fd); + rn->fd = -1; } static void udp_recv_close(struct receiver_node *rn) { - struct private_udp_recv_data *purd = rn->private_data; - - if (purd->fd >= 0) - close(purd->fd); - btr_pool_free(purd->btrp); - free(rn->private_data); + if (rn->fd >= 0) + close(rn->fd); + btr_pool_free(rn->btrp); } static void *udp_recv_parse_config(int argc, char **argv) @@ -126,9 +125,11 @@ static int mcast_receiver_setup(int fd, const char *iface) if (getsockname(fd, (struct sockaddr *)&ss, &sslen) < 0) goto err; + assert(ss.ss_family == AF_INET || ss.ss_family == AF_INET6); if (iface != NULL && id == 0) - PARA_WARNING_LOG("could not resolve interface %s, using default", iface); + PARA_WARNING_LOG("could not resolve interface %s, using default\n", + iface); switch (ss.ss_family) { case AF_INET: @@ -143,12 +144,13 @@ static int mcast_receiver_setup(int fd, const char *iface) m4.imr_interface.s_addr = INADDR_ANY; if (id != 0) - PARA_ERROR_LOG("Setting IPv4 receiver mcast interface not supported."); + PARA_ERROR_LOG("Setting IPv4 receiver mcast interface not supported\n"); #endif - m4.imr_multiaddr = ((struct sockaddr_in *)&ss)->sin_addr; + m4.imr_multiaddr = ((struct sockaddr_in *)&ss)->sin_addr; - if (setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &m4, sizeof(m4)) < 0) + if (setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, + &m4, sizeof(m4)) < 0) break; } return 0; @@ -163,9 +165,6 @@ static int mcast_receiver_setup(int fd, const char *iface) 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); @@ -173,42 +172,38 @@ err: 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->private_data = para_calloc(sizeof(struct private_udp_recv_data)); - purd = rn->private_data; - - ret = makesock(AF_UNSPEC, IPPROTO_UDP, 1, c->host_arg, c->port_arg); + ret = makesock(IPPROTO_UDP, 1, c->host_arg, c->port_arg, NULL); if (ret < 0) goto err; - purd->fd = ret; + rn->fd = ret; - ret = mcast_receiver_setup(purd->fd, iface); + ret = mcast_receiver_setup(rn->fd, iface); if (ret < 0) { - close(purd->fd); - return ret; + close(rn->fd); + goto err; } - ret = mark_fd_nonblocking(purd->fd); + ret = mark_fd_nonblocking(rn->fd); if (ret < 0) { - close(purd->fd); + close(rn->fd); goto err; } PARA_INFO_LOG("receiving from %s:%d, fd=%d\n", c->host_arg, - c->port_arg, purd->fd); - purd->btrp = btr_pool_new("udp_recv", 320 * 1024); - return purd->fd; + c->port_arg, rn->fd); + rn->btrp = btr_pool_new("udp_recv", 320 * 1024); + return rn->fd; err: - free(rn->private_data); return ret; } static void udp_recv_free_config(void *conf) { udp_recv_cmdline_parser_free(conf); + free(conf); } /**