/* * PCM I/O Plug-In Interface * Copyright (c) 1999 by Jaroslav Kysela * * * This library is free software; you can redistribute it and/or modify * it under the terms of the GNU Library General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include "pcm_plugin.h" #define pcm_write(plug,buf,count) snd_pcm_oss_write3(plug,buf,count,1) #define pcm_writev(plug,vec,count) snd_pcm_oss_writev3(plug,vec,count,1) #define pcm_read(plug,buf,count) snd_pcm_oss_read3(plug,buf,count,1) #define pcm_readv(plug,vec,count) snd_pcm_oss_readv3(plug,vec,count,1) /* * Basic io plugin */ static snd_pcm_sframes_t io_playback_transfer(struct snd_pcm_plugin *plugin, const struct snd_pcm_plugin_channel *src_channels, struct snd_pcm_plugin_channel *dst_channels, snd_pcm_uframes_t frames) { if (snd_BUG_ON(!plugin)) return -ENXIO; if (snd_BUG_ON(!src_channels)) return -ENXIO; if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { return pcm_write(plugin->plug, src_channels->area.addr, frames); } else { int channel, channels = plugin->dst_format.channels; void **bufs = (void**)plugin->extra_data; if (snd_BUG_ON(!bufs)) return -ENXIO; for (channel = 0; channel < channels; channel++) { if (src_channels[channel].enabled) bufs[channel] = src_channels[channel].area.addr; else bufs[channel] = NULL; } return pcm_writev(plugin->plug, bufs, frames); } } static snd_pcm_sframes_t io_capture_transfer(struct snd_pcm_plugin *plugin, const struct snd_pcm_plugin_channel *src_channels, struct snd_pcm_plugin_channel *dst_channels, snd_pcm_uframes_t frames) { if (snd_BUG_ON(!plugin)) return -ENXIO; if (snd_BUG_ON(!dst_channels)) return -ENXIO; if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { return pcm_read(plugin->plug, dst_channels->area.addr, frames); } else { int channel, channels = plugin->dst_format.channels; void **bufs = (void**)plugin->extra_data; if (snd_BUG_ON(!bufs)) return -ENXIO; for (channel = 0; channel < channels; channel++) { if (dst_channels[channel].enabled) bufs[channel] = dst_channels[channel].area.addr; else bufs[channel] = NULL; } return pcm_readv(plugin->plug, bufs, frames); } return 0; } static snd_pcm_sframes_t io_src_channels(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames, struct snd_pcm_plugin_channel **channels) { int err; unsigned int channel; struct snd_pcm_plugin_channel *v; err = snd_pcm_plugin_client_channels(plugin, frames, &v); if (err < 0) return err; *channels = v; if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { for (channel = 0; channel < plugin->src_format.channels; ++channel, ++v) v->wanted = 1; } return frames; } int snd_pcm_plugin_build_io(struct snd_pcm_substream *plug, struct snd_pcm_hw_params *params, struct snd_pcm_plugin **r_plugin) { int err; struct snd_pcm_plugin_format format; struct snd_pcm_plugin *plugin; if (snd_BUG_ON(!r_plugin)) return -ENXIO; *r_plugin = NULL; if (snd_BUG_ON(!plug || !params)) return -ENXIO; format.format = params_format(params); format.rate = params_rate(params); format.channels = params_channels(params); err = snd_pcm_plugin_build(plug, "I/O io", &format, &format, sizeof(void *) * format.channels, &plugin); if (err < 0) return err; plugin->access = params_access(params); if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) { plugin->transfer = io_playback_transfer; if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) plugin->client_channels = io_src_channels; } else { plugin->transfer = io_capture_transfer; } *r_plugin = plugin; return 0; }
authorRobert Shearman <rshearma@brocade.com>2017-01-26 18:02:24 +0000
committerDavid S. Miller <davem@davemloft.net>2017-01-30 15:00:58 -0500
commit63a6fff353d01da5a22b72670c434bf12fa0e3b8 (patch)
tree5707ae376777271ab2d77411fed89afb515f0257 /tools
parenta3a4de056ed5cfb22085173d8f0f13b0ca6b6d60 (diff)
net: Avoid receiving packets with an l3mdev on unbound UDP sockets
Packets arriving in a VRF currently are delivered to UDP sockets that aren't bound to any interface. TCP defaults to not delivering packets arriving in a VRF to unbound sockets. IP route lookup and socket transmit both assume that unbound means using the default table and UDP applications that haven't been changed to be aware of VRFs may not function correctly in this case since they may not be able to handle overlapping IP address ranges, or be able to send packets back to the original sender if required. So add a sysctl, udp_l3mdev_accept, to control this behaviour with it being analgous to the existing tcp_l3mdev_accept, namely to allow a process to have a VRF-global listen socket. Have this default to off as this is the behaviour that users will expect, given that there is no explicit mechanism to set unmodified VRF-unaware application into a default VRF. Signed-off-by: Robert Shearman <rshearma@brocade.com> Acked-by: David Ahern <dsa@cumulusnetworks.com> Tested-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools')