--- /dev/null
+/*
+ * PCM - SHM Client
+ * Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+ *
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/shm.h>
+#include <sys/socket.h>
+#include <sys/poll.h>
+#include <sys/un.h>
+#include <sys/mman.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <netdb.h>
+#include "aserver.h"
+
+typedef struct {
+ int socket;
+ void *ctrl;
+ size_t hw_ptr;
+ size_t appl_ptr;
+ snd_pcm_mmap_info_t *slave_mmap_info;
+} snd_pcm_shm_t;
+
+int receive_fd(int socket, void *data, size_t len, int *fd)
+{
+ int ret;
+ size_t cmsg_len = CMSG_LEN(sizeof(int));
+ struct cmsghdr *cmsg = alloca(cmsg_len);
+ int *fds = (int *) CMSG_DATA(cmsg);
+ struct msghdr msghdr;
+ struct iovec vec;
+
+ vec.iov_base = (void *)&data;
+ vec.iov_len = len;
+
+ cmsg->cmsg_len = cmsg_len;
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ *fds = -1;
+
+ msghdr.msg_name = NULL;
+ msghdr.msg_namelen = 0;
+ msghdr.msg_iov = &vec;
+ msghdr.msg_iovlen = 1;
+ msghdr.msg_control = cmsg;
+ msghdr.msg_controllen = cmsg_len;
+ msghdr.msg_flags = 0;
+
+ ret = recvmsg(socket, &msghdr, 0);
+ if (ret < 0) {
+ ERR("recvmsg failed");
+ return -errno;
+ }
+ *fd = *fds;
+ return ret;
+}
+
+static int snd_pcm_shm_action(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ int err;
+ char buf[1];
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ err = write(shm->socket, buf, 1);
+ if (err != 1)
+ return -EBADFD;
+ err = read(shm->socket, buf, 1);
+ if (err != 1)
+ return -EBADFD;
+ if (ctrl->cmd) {
+ fprintf(stderr, "Server has not done the cmd\n");
+ return -EBADFD;
+ }
+ return ctrl->result;
+}
+
+static int snd_pcm_shm_action_fd(snd_pcm_t *pcm, int *fd)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ int err;
+ char buf[1];
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ err = write(shm->socket, buf, 1);
+ if (err != 1)
+ return -EBADFD;
+ err = receive_fd(shm->socket, buf, 1, fd);
+ if (err != 1)
+ return -EBADFD;
+ if (ctrl->cmd) {
+ fprintf(stderr, "Server has not done the cmd\n");
+ return -EBADFD;
+ }
+ return ctrl->result;
+}
+
+static int snd_pcm_shm_drain(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_DRAIN;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ if (!(pcm->mode & SND_PCM_NONBLOCK))
+ snd_pcm_wait(pcm, -1);
+ return err;
+}
+
+static int snd_pcm_shm_close(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int result;
+ if (!(pcm->mode & SND_PCM_NONBLOCK))
+ snd_pcm_shm_drain(pcm);
+ ctrl->cmd = SND_PCM_IOCTL_CLOSE;
+ result = snd_pcm_shm_action(pcm);
+ shmdt((void *)ctrl);
+ close(shm->socket);
+ close(pcm->poll_fd);
+ free(shm);
+ return result;
+}
+
+static int snd_pcm_shm_nonblock(snd_pcm_t *pcm ATTRIBUTE_UNUSED, int nonblock ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+static int snd_pcm_shm_async(snd_pcm_t *pcm, int sig, pid_t pid)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ ctrl->cmd = SND_PCM_IOCTL_ASYNC;
+ ctrl->u.async.sig = sig;
+ if (pid == 0)
+ pid = getpid();
+ ctrl->u.async.pid = pid;
+ return snd_pcm_shm_action(pcm);
+}
+
+static int snd_pcm_shm_info(snd_pcm_t *pcm, snd_pcm_info_t * info)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+// ctrl->u.info = *info;
+ ctrl->cmd = SND_PCM_IOCTL_INFO;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *info = ctrl->u.info;
+ return err;
+}
+
+static int snd_pcm_shm_params_info(snd_pcm_t *pcm, snd_pcm_params_info_t * info)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_PARAMS_INFO;
+ ctrl->u.params_info = *info;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *info = ctrl->u.params_info;
+ return err;
+}
+
+static int snd_pcm_shm_params(snd_pcm_t *pcm, snd_pcm_params_t * params)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_PARAMS;
+ ctrl->u.params = *params;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *params = ctrl->u.params;
+ return err;
+}
+
+static int snd_pcm_shm_setup(snd_pcm_t *pcm, snd_pcm_setup_t * setup)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_SETUP;
+ // ctrl->u.setup = *setup;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *setup = ctrl->u.setup;
+ return err;
+}
+
+static int snd_pcm_shm_channel_info(snd_pcm_t *pcm, snd_pcm_channel_info_t * info)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_CHANNEL_INFO;
+ ctrl->u.channel_info = *info;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *info = ctrl->u.channel_info;
+ return err;
+}
+
+static int snd_pcm_shm_channel_params(snd_pcm_t *pcm, snd_pcm_channel_params_t * params)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_CHANNEL_PARAMS;
+ ctrl->u.channel_params = *params;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *params = ctrl->u.channel_params;
+ return err;
+}
+
+static void *convert_addr(void *addr, size_t count, snd_pcm_mmap_info_t *old, snd_pcm_mmap_info_t *new)
+{
+ size_t k;
+ size_t mindist = ULONG_MAX;
+ int idx = -1;
+ for (k = 0; k < count; ++k) {
+ if (addr >= old[k].addr) {
+ size_t dist = addr - old[k].addr;
+ if (dist < mindist) {
+ mindist = dist;
+ idx = k;
+ }
+ }
+ }
+ assert(idx >= 0);
+ return new[idx].addr + mindist;
+}
+
+static int snd_pcm_shm_channel_setup(snd_pcm_t *pcm, snd_pcm_channel_setup_t * setup)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_CHANNEL_SETUP;
+ ctrl->u.channel_setup = *setup;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *setup = ctrl->u.channel_setup;
+ if (pcm->mmap_info) {
+ setup->running_area.addr = convert_addr(setup->running_area.addr, pcm->mmap_info_count, shm->slave_mmap_info, pcm->mmap_info);
+ setup->stopped_area.addr = convert_addr(setup->stopped_area.addr, pcm->mmap_info_count, shm->slave_mmap_info, pcm->mmap_info);
+ }
+ return err;
+}
+
+static int snd_pcm_shm_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_STATUS;
+ // ctrl->u.status = *status;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *status = ctrl->u.status;
+ return err;
+}
+
+static int snd_pcm_shm_state(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ ctrl->cmd = SND_PCM_IOCTL_STATE;
+ return snd_pcm_shm_action(pcm);
+}
+
+static int snd_pcm_shm_delay(snd_pcm_t *pcm, ssize_t *delayp)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_DELAY;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ *delayp = ctrl->u.delay;
+ return err;
+}
+
+static ssize_t snd_pcm_shm_avail_update(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_AVAIL_UPDATE;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ shm->hw_ptr = shm->appl_ptr;
+ if (pcm->stream == SND_PCM_STREAM_PLAYBACK)
+ snd_pcm_mmap_hw_backward(pcm, err);
+ else
+ snd_pcm_mmap_hw_forward(pcm, err);
+ return err;
+}
+
+static int snd_pcm_shm_prepare(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ ctrl->cmd = SND_PCM_IOCTL_PREPARE;
+ return snd_pcm_shm_action(pcm);
+}
+
+static int snd_pcm_shm_start(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ ctrl->cmd = SND_PCM_IOCTL_START;
+ return snd_pcm_shm_action(pcm);
+}
+
+static int snd_pcm_shm_drop(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ ctrl->cmd = SND_PCM_IOCTL_DROP;
+ return snd_pcm_shm_action(pcm);
+}
+
+static int snd_pcm_shm_pause(snd_pcm_t *pcm, int enable)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ ctrl->cmd = SND_PCM_IOCTL_PAUSE;
+ ctrl->u.pause = enable;
+ return snd_pcm_shm_action(pcm);
+}
+
+static ssize_t snd_pcm_shm_rewind(snd_pcm_t *pcm, size_t frames)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_REWIND;
+ ctrl->u.rewind = frames;
+ err = snd_pcm_shm_action(pcm);
+ if (err >= 0)
+ snd_pcm_mmap_appl_backward(pcm, err);
+ return err;
+}
+
+static int snd_pcm_shm_mmap(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int count, k, err, fd;
+ ctrl->cmd = SND_PCM_IOCTL_MMAP;
+ count = snd_pcm_shm_action(pcm);
+ if (count < 0)
+ return count;
+ pcm->mmap_info_count = count;
+ pcm->mmap_info = malloc(count * sizeof(*pcm->mmap_info));
+ shm->slave_mmap_info = malloc(count * sizeof(*shm->slave_mmap_info));
+ for (k = 0; k < count; ++k) {
+ snd_pcm_mmap_info_t *i = &pcm->mmap_info[k];
+ void *ptr;
+ ctrl->cmd = SND_PCM_IOCTL_MMAP_INFO;
+ ctrl->u.mmap_info.index = k;
+ err = snd_pcm_shm_action_fd(pcm, &fd);
+ if (err < 0)
+ return err;
+ shm->slave_mmap_info[k] = ctrl->u.mmap_info;
+ *i = ctrl->u.mmap_info;
+ if (i->type == SND_PCM_MMAP_KERNEL) {
+ i->u.kernel.fd = fd;
+ ptr = mmap(NULL, i->size, PROT_WRITE | PROT_READ,
+ MAP_FILE | MAP_SHARED,
+ fd, SND_PCM_MMAP_OFFSET_DATA);
+ close(fd);
+ if (ptr == MAP_FAILED || ptr == NULL) {
+ ERR("mmap failed");
+ free(pcm->mmap_info);
+ return -errno;
+ }
+ } else {
+ ptr = shmat(i->u.user.shmid, 0, 0);
+ if (ptr == (void*)-1) {
+ ERR("shmat failed");
+ free(pcm->mmap_info);
+ return -errno;
+ }
+ }
+ i->addr = ptr;
+ }
+ return 0;
+}
+
+static int snd_pcm_shm_munmap(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ unsigned int k;
+ ctrl->cmd = SND_PCM_IOCTL_MUNMAP;
+ err = snd_pcm_shm_action(pcm);
+ if (err < 0)
+ return err;
+ for (k = 0; k < pcm->mmap_info_count; ++k) {
+ snd_pcm_mmap_info_t *i = &pcm->mmap_info[k];
+ if (i->type == SND_PCM_MMAP_KERNEL) {
+ err = munmap(i->addr, i->size);
+ if (err < 0)
+ ERR("munmap failed");
+ return -errno;
+ } else {
+ err = shmdt(i->addr);
+ if (err < 0)
+ ERR("shmdt failed");
+ return -errno;
+ }
+ }
+ pcm->mmap_info_count = 0;
+ free(pcm->mmap_info);
+ free(shm->slave_mmap_info);
+ pcm->mmap_info = 0;
+ shm->slave_mmap_info = 0;
+ return ctrl->result;
+}
+
+static ssize_t snd_pcm_shm_mmap_forward(snd_pcm_t *pcm, size_t size)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int err;
+ ctrl->cmd = SND_PCM_IOCTL_MMAP_FORWARD;
+ ctrl->u.mmap_forward = size;
+ err = snd_pcm_shm_action(pcm);
+ if (err >= 0)
+ snd_pcm_mmap_appl_forward(pcm, err);
+ return err;
+}
+
+static int snd_pcm_shm_poll_descriptor(snd_pcm_t *pcm)
+{
+ snd_pcm_shm_t *shm = pcm->private;
+ snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;
+ int fd, err;
+ ctrl->cmd = SND_PCM_IOCTL_POLL_DESCRIPTOR;
+ err = snd_pcm_shm_action_fd(pcm, &fd);
+ if (err < 0)
+ return err;
+ return fd;
+}
+
+static int snd_pcm_shm_channels_mask(snd_pcm_t *pcm ATTRIBUTE_UNUSED,
+ bitset_t *cmask ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+static void snd_pcm_shm_dump(snd_pcm_t *pcm, FILE *fp)
+{
+ fprintf(fp, "Shm PCM\n");
+ if (pcm->valid_setup) {
+ fprintf(fp, "\nIts setup is:\n");
+ snd_pcm_dump_setup(pcm, fp);
+ }
+}
+
+snd_pcm_ops_t snd_pcm_shm_ops = {
+ close: snd_pcm_shm_close,
+ info: snd_pcm_shm_info,
+ params_info: snd_pcm_shm_params_info,
+ params: snd_pcm_shm_params,
+ setup: snd_pcm_shm_setup,
+ channel_info: snd_pcm_shm_channel_info,
+ channel_params: snd_pcm_shm_channel_params,
+ channel_setup: snd_pcm_shm_channel_setup,
+ dump: snd_pcm_shm_dump,
+ nonblock: snd_pcm_shm_nonblock,
+ async: snd_pcm_shm_async,
+ mmap: snd_pcm_shm_mmap,
+ munmap: snd_pcm_shm_munmap,
+};
+
+snd_pcm_fast_ops_t snd_pcm_shm_fast_ops = {
+ status: snd_pcm_shm_status,
+ state: snd_pcm_shm_state,
+ delay: snd_pcm_shm_delay,
+ prepare: snd_pcm_shm_prepare,
+ start: snd_pcm_shm_start,
+ drop: snd_pcm_shm_drop,
+ drain: snd_pcm_shm_drain,
+ pause: snd_pcm_shm_pause,
+ rewind: snd_pcm_shm_rewind,
+ writei: snd_pcm_mmap_writei,
+ writen: snd_pcm_mmap_writen,
+ readi: snd_pcm_mmap_readi,
+ readn: snd_pcm_mmap_readn,
+ channels_mask: snd_pcm_shm_channels_mask,
+ avail_update: snd_pcm_shm_avail_update,
+ mmap_forward: snd_pcm_shm_mmap_forward,
+};
+
+static int make_local_socket(const char *filename)
+{
+ size_t l = strlen(filename);
+ size_t size = offsetof(struct sockaddr_un, sun_path) + l;
+ struct sockaddr_un *addr = alloca(size);
+ int sock;
+
+ sock = socket(PF_LOCAL, SOCK_STREAM, 0);
+ if (sock < 0) {
+ ERR("socket failed");
+ return -errno;
+ }
+
+ addr->sun_family = AF_LOCAL;
+ memcpy(addr->sun_path, filename, l);
+
+ if (connect(sock, (struct sockaddr *) addr, size) < 0) {
+ ERR("connect failed");
+ return -errno;
+ }
+ return sock;
+}
+
+#if 0
+static int make_inet_socket(const char *host, int port)
+{
+ struct sockaddr_in addr;
+ int sock;
+ struct hostent *h = gethostbyname(host);
+ if (!h)
+ return -ENOENT;
+
+ sock = socket(PF_INET, SOCK_STREAM, 0);
+ if (sock < 0) {
+ ERR("socket failed");
+ return -errno;
+ }
+
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(port);
+ memcpy(&addr.sin_addr, h->h_addr_list[0], sizeof(struct in_addr));
+
+ if (connect(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+ ERR("connect failed");
+ return -errno;
+ }
+ return sock;
+}
+#endif
+
+int snd_pcm_shm_open(snd_pcm_t **pcmp, char *name, char *socket, char *sname, int stream, int mode)
+{
+ snd_pcm_t *pcm;
+ snd_pcm_shm_t *shm = NULL;
+ snd_client_open_request_t *req;
+ snd_client_open_answer_t ans;
+ size_t snamelen, reqlen;
+ int err;
+ int result;
+ snd_pcm_shm_ctrl_t *ctrl = NULL;
+ int sock = -1;
+ snamelen = strlen(sname);
+ if (snamelen > 255)
+ return -EINVAL;
+
+ result = make_local_socket(socket);
+ if (result < 0) {
+ ERR("server for socket %s is not running", socket);
+ goto _err;
+ }
+ sock = result;
+
+ reqlen = sizeof(*req) + snamelen;
+ req = alloca(reqlen);
+ memcpy(req->name, sname, snamelen);
+ req->dev_type = SND_DEV_TYPE_PCM;
+ req->transport_type = SND_TRANSPORT_TYPE_SHM;
+ req->stream = stream;
+ req->mode = mode;
+ req->namelen = snamelen;
+ err = write(sock, req, reqlen);
+ if (err < 0) {
+ ERR("write error");
+ result = -errno;
+ goto _err;
+ }
+ if ((size_t) err != reqlen) {
+ ERR("write size error");
+ result = -EINVAL;
+ goto _err;
+ }
+ err = read(sock, &ans, sizeof(ans));
+ if (err < 0) {
+ ERR("read error");
+ result = -errno;
+ goto _err;
+ }
+ if (err != sizeof(ans)) {
+ ERR("read size error");
+ result = -EINVAL;
+ goto _err;
+ }
+ result = ans.result;
+ if (result < 0)
+ goto _err;
+
+ ctrl = shmat(ans.cookie, 0, 0);
+ if (!ctrl) {
+ ERR("shmat error");
+ result = -errno;
+ goto _err;
+ }
+
+ shm = calloc(1, sizeof(snd_pcm_shm_t));
+ if (!shm) {
+ result = -ENOMEM;
+ goto _err;
+ }
+
+ shm->socket = sock;
+ shm->ctrl = ctrl;
+
+ pcm = calloc(1, sizeof(snd_pcm_t));
+ if (!pcm) {
+ result = -ENOMEM;
+ goto _err;
+ }
+ if (name)
+ pcm->name = strdup(name);
+ pcm->type = SND_PCM_TYPE_SHM;
+ pcm->stream = stream;
+ pcm->mode = mode;
+ pcm->mmap_auto = 1;
+ pcm->ops = &snd_pcm_shm_ops;
+ pcm->op_arg = pcm;
+ pcm->fast_ops = &snd_pcm_shm_fast_ops;
+ pcm->fast_op_arg = pcm;
+ pcm->private = shm;
+ err = snd_pcm_shm_poll_descriptor(pcm);
+ if (err < 0) {
+ snd_pcm_close(pcm);
+ return err;
+ }
+ pcm->poll_fd = err;
+ pcm->hw_ptr = &shm->hw_ptr;
+ pcm->appl_ptr = &shm->appl_ptr;
+ *pcmp = pcm;
+ return 0;
+
+ _err:
+ close(sock);
+ if (ctrl)
+ shmdt(ctrl);
+ if (shm)
+ free(shm);
+ return result;
+}
+
+int is_local(struct hostent *hent)
+{
+ int s;
+ int err;
+ struct ifconf conf;
+ size_t numreqs = 10;
+ size_t i;
+ struct in_addr *haddr = (struct in_addr*) hent->h_addr_list[0];
+
+ s = socket(PF_INET, SOCK_STREAM, 0);
+ if (s < 0) {
+ ERR("socket failed");
+ return -errno;
+ }
+
+ conf.ifc_len = numreqs * sizeof(struct ifreq);
+ conf.ifc_buf = malloc(conf.ifc_len);
+ while (1) {
+ err = ioctl(s, SIOCGIFCONF, &conf);
+ if (err < 0) {
+ ERR("SIOCGIFCONF failed");
+ return -errno;
+ }
+ if ((size_t)conf.ifc_len < numreqs * sizeof(struct ifreq))
+ break;
+ numreqs *= 2;
+ conf.ifc_len = numreqs * sizeof(struct ifreq);
+ conf.ifc_buf = realloc(conf.ifc_buf, conf.ifc_len);
+ }
+ numreqs = conf.ifc_len / sizeof(struct ifreq);
+ for (i = 0; i < numreqs; ++i) {
+ struct ifreq *req = &conf.ifc_req[i];
+ struct sockaddr_in *sin = (struct sockaddr_in *)&req->ifr_addr;
+ sin->sin_family = AF_INET;
+ err = ioctl(s, SIOCGIFADDR, req);
+ if (err < 0)
+ continue;
+ if (haddr->s_addr == sin->sin_addr.s_addr)
+ break;
+ }
+ close(s);
+ free(conf.ifc_buf);
+ return i < numreqs;
+}
+
+int _snd_pcm_shm_open(snd_pcm_t **pcmp, char *name, snd_config_t *conf,
+ int stream, int mode)
+{
+ snd_config_iterator_t i;
+ char *server = NULL;
+ char *sname = NULL;
+ snd_config_t *sconfig;
+ char *host = NULL;
+ char *socket = NULL;
+ long port = -1;
+ int err;
+ int local;
+ struct hostent *h;
+ snd_config_foreach(i, conf) {
+ snd_config_t *n = snd_config_entry(i);
+ if (strcmp(n->id, "comment") == 0)
+ continue;
+ if (strcmp(n->id, "type") == 0)
+ continue;
+ if (strcmp(n->id, "stream") == 0)
+ continue;
+ if (strcmp(n->id, "server") == 0) {
+ err = snd_config_string_get(n, &server);
+ if (err < 0) {
+ ERR("Invalid type for server");
+ return -EINVAL;
+ }
+ continue;
+ }
+ if (strcmp(n->id, "sname") == 0) {
+ err = snd_config_string_get(n, &sname);
+ if (err < 0) {
+ ERR("Invalid type for sname");
+ return -EINVAL;
+ }
+ continue;
+ }
+ ERR("Unknown field: %s", n->id);
+ return -EINVAL;
+ }
+ if (!sname) {
+ ERR("sname is not defined");
+ return -EINVAL;
+ }
+ if (!server) {
+ ERR("server is not defined");
+ return -EINVAL;
+ }
+ err = snd_config_searchv(snd_config, &sconfig, "server", server, 0);
+ if (err < 0) {
+ ERR("Unknown server %s", server);
+ return -EINVAL;
+ }
+ snd_config_foreach(i, sconfig) {
+ snd_config_t *n = snd_config_entry(i);
+ if (strcmp(n->id, "comment") == 0)
+ continue;
+ if (strcmp(n->id, "host") == 0) {
+ err = snd_config_string_get(n, &host);
+ if (err < 0) {
+ ERR("Invalid type for host");
+ return -EINVAL;
+ }
+ continue;
+ }
+ if (strcmp(n->id, "socket") == 0) {
+ err = snd_config_string_get(n, &socket);
+ if (err < 0) {
+ ERR("Invalid type for socket");
+ return -EINVAL;
+ }
+ continue;
+ }
+ if (strcmp(n->id, "port") == 0) {
+ err = snd_config_integer_get(n, &port);
+ if (err < 0) {
+ ERR("Invalid type for port");
+ return -EINVAL;
+ }
+ continue;
+ }
+ ERR("Unknown field: %s", n->id);
+ return -EINVAL;
+ }
+
+ if (!host) {
+ ERR("host is not defined");
+ return -EINVAL;
+ }
+ if (!socket) {
+ ERR("socket is not defined");
+ return -EINVAL;
+ }
+ h = gethostbyname(host);
+ if (!h) {
+ ERR("Cannot resolve %s", host);
+ return -EINVAL;
+ }
+ local = is_local(h);
+ if (!local) {
+ ERR("%s is not the local host", host);
+ return -EINVAL;
+ }
+ return snd_pcm_shm_open(pcmp, name, socket, sname, stream, mode);
+}
+
OSDN Git Service
