tRefactor call-state management - ratox - FIFO based tox client
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---
(DIR) commit a0737ec5a4e6bddef86a7317e06740ed445a00c0
(DIR) parent 4f4f6e1320ff996e09a5b78d6431b5ccf80a94bc
(HTM) Author: FRIGN <dev@frign.de>
Date: Fri, 17 Oct 2014 14:31:08 +0200
Refactor call-state management
Checking call_out only and stopping the call as soon as call_out
is gone is not desirable behaviour.
It now keeps up the running call until both call_out and call_in
have been "closed", no matter how or by whom it was started.
This is done by introducing av.state, which is a bit field.
While at it, I also incorporated the transmission-state into it.
ttoxav_hangup() will now only be called from the one centralized
flag-checking-loop before select, not in the callbacks themselves.
This will also get rid of some race-conditions (more or less).
Previously, call_out was constantly polled as long as the user
was online. Change this to only attempt to open call_out when the
call is initialized. This lowers CPU-usage dramatically.
Diffstat:
M ratox.c | 222 ++++++++++++++++---------------
1 file changed, 118 insertions(+), 104 deletions(-)
---
(DIR) diff --git a/ratox.c b/ratox.c
t@@ -161,13 +161,19 @@ struct transfer {
int cooldown;
};
+enum {
+ OUTGOING = 1 << 0,
+ INCOMING = 1 << 1,
+ TRANSMITTING = 1 << 2,
+ INCOMPLETE = 1 << 3,
+};
+
struct call {
int num;
- int transmission;
+ int state;
uint8_t *frame;
uint8_t payload[RTP_PAYLOAD_SIZE];
ssize_t n;
- int incompleteframe;
struct timespec lastsent;
};
t@@ -210,6 +216,7 @@ static int proxyflag;
static struct timespec timediff(struct timespec, struct timespec);
static void printrat(void);
static void logmsg(const char *, ...);
+static int fifoopen(int, struct file);
static void fiforeset(int, int *, struct file);
static ssize_t fiforead(int, int *, struct file, void *, size_t);
static void cbcallinvite(void *, int32_t, void *);
t@@ -249,6 +256,9 @@ static void initshutdown(int);
static void shutdown(void);
static void usage(void);
+#define FD_APPEND(fd) FD_SET((fd), &rfds); \
+ if ((fd) > fdmax) fdmax = (fd);
+
static struct timespec
timediff(struct timespec t1, struct timespec t2)
{
t@@ -302,6 +312,17 @@ logmsg(const char *fmt, ...)
va_end(ap);
}
+int
+fifoopen(int dirfd, struct file f)
+{
+ int fd;
+
+ fd = openat(dirfd, f.name, f.flags, 0666);
+ if (fd < 0 && errno != ENXIO)
+ eprintf("openat %s:", f.name);
+ return fd;
+}
+
static void
fiforeset(int dirfd, int *fd, struct file f)
{
t@@ -315,10 +336,7 @@ fiforeset(int dirfd, int *fd, struct file f)
r = mkfifoat(dirfd, f.name, 0666);
if (r < 0 && errno != EEXIST)
eprintf("mkfifoat %s:", f.name);
- r = openat(dirfd, f.name, f.flags);
- if (r < 0 && errno != ENXIO)
- eprintf("openat %s:", f.name);
- *fd = r;
+ *fd = fifoopen(dirfd, f);
}
static ssize_t
t@@ -396,8 +414,8 @@ cbcallstart(void *av, int32_t cnum, void *udata)
f->av.frame = malloc(sizeof(int16_t) * framesize);
if (!f->av.frame)
eprintf("malloc:");
+
f->av.n = 0;
- f->av.incompleteframe = 0;
f->av.lastsent.tv_sec = 0;
f->av.lastsent.tv_nsec = 0;
t@@ -409,7 +427,7 @@ cbcallstart(void *av, int32_t cnum, void *udata)
weprintf("Failed to hang up\n");
return;
}
- f->av.transmission = 1;
+ f->av.state |= TRANSMITTING;
ftruncate(f->fd[FCALL_STATE], 0);
lseek(f->fd[FCALL_STATE], 0, SEEK_SET);
t@@ -449,7 +467,7 @@ cbcalldata(ToxAv *av, int32_t cnum, int16_t *data, int len, void *udata)
{
struct friend *f;
uint8_t *buf;
- int wrote = 0;
+ int fd, wrote = 0;
ssize_t n;
TAILQ_FOREACH(f, &friendhead, entry)
t@@ -457,6 +475,18 @@ cbcalldata(ToxAv *av, int32_t cnum, int16_t *data, int len, void *udata)
break;
if (!f)
return;
+ if (!(f->av.state & INCOMING)) {
+ /* try to open call_out for writing */
+ fd = fifoopen(f->dirfd, ffiles[FCALL_OUT]);
+ if (fd < 0) {
+ close (fd);
+ return;
+ }
+ if (f->fd[FCALL_OUT] < 0) {
+ f->fd[FCALL_OUT] = fd;
+ f->av.state |= INCOMING;
+ }
+ }
buf = (uint8_t *)data;
len *= 2;
t@@ -464,7 +494,7 @@ cbcalldata(ToxAv *av, int32_t cnum, int16_t *data, int len, void *udata)
n = write(f->fd[FCALL_OUT], &buf[wrote], len);
if (n < 0) {
if (errno == EPIPE) {
- toxav_hangup(toxav, f->av.num);
+ f->av.state &= ~INCOMING;
break;
} else if (errno == EWOULDBLOCK) {
continue;
t@@ -486,13 +516,13 @@ cancelcall(struct friend *f, char *action)
logmsg(": %s : Audio > %s\n", f->name, action);
if (f->av.num != -1) {
- if (f->av.transmission) {
+ if (f->av.state & TRANSMITTING) {
r = toxav_kill_transmission(toxav, f->av.num);
if (r < 0)
weprintf("Failed to kill transmission\n");
}
}
- f->av.transmission = 0;
+ f->av.state = 0;
f->av.num = -1;
/* Cancel Rx side of the call */
t@@ -518,19 +548,18 @@ sendfriendcalldata(struct friend *f)
int r;
n = fiforead(f->dirfd, &f->fd[FCALL_IN], ffiles[FCALL_IN],
- f->av.frame + f->av.incompleteframe * f->av.n,
- framesize * sizeof(int16_t) - f->av.incompleteframe * f->av.n);
+ f->av.frame + ((f->av.state & INCOMPLETE) != 0) * f->av.n,
+ framesize * sizeof(int16_t) - ((f->av.state & INCOMPLETE) != 0) * f->av.n);
if (n == 0) {
- r = toxav_hangup(toxav, f->av.num);
- if (r < 0)
- weprintf("Failed to hang up\n");
+ f->av.state &= ~OUTGOING;
return;
} else if (n < 0) {
return;
- } else if (n == (framesize * sizeof(int16_t) - f->av.incompleteframe * f->av.n)) {
- f->av.incompleteframe = 0;
+ } else if (n == (framesize * sizeof(int16_t) - ((f->av.state & INCOMPLETE) != 0) * f->av.n)) {
+ f->av.state &= ~INCOMPLETE;
f->av.n = 0;
} else {
+ f->av.state |= INCOMPLETE;
f->av.n += n;
return;
}
t@@ -1361,7 +1390,7 @@ friendcreate(int32_t frnum)
ftruncate(f->fd[FCALL_STATE], 0);
dprintf(f->fd[FCALL_STATE], "0\n");
- f->av.transmission = 0;
+ f->av.state = 0;
f->av.num = -1;
TAILQ_INSERT_TAIL(&friendhead, f, entry);
t@@ -1592,7 +1621,7 @@ loop(void)
char tstamp[64];
struct friend *f, *ftmp;
struct request *req, *rtmp;
- time_t t0, t1, now;
+ time_t t0, t1;
int connected = 0;
int i, n, r;
int fd, fdmax;
t@@ -1606,10 +1635,10 @@ loop(void)
logmsg("DHT > Connecting\n");
toxconnect();
while (running) {
- if (tox_isconnected(tox) == 1) {
- if (connected == 0) {
+ /* Handle connection states */
+ if (tox_isconnected(tox)) {
+ if (!connected) {
logmsg("DHT > Connected\n");
- /* Cancel any pending transfers */
TAILQ_FOREACH(f, &friendhead, entry) {
canceltxtransfer(f);
cancelrxtransfer(f);
t@@ -1617,7 +1646,7 @@ loop(void)
connected = 1;
}
} else {
- if (connected == 1) {
+ if (connected) {
logmsg("DHT > Disconnected\n");
connected = 0;
}
t@@ -1630,23 +1659,20 @@ loop(void)
}
tox_do(tox);
+ /* Prepare select-fd-set */
FD_ZERO(&rfds);
-
fdmax = -1;
+
for (i = 0; i < LEN(gslots); i++) {
- FD_SET(gslots[i].fd[IN], &rfds);
- if (gslots[i].fd[IN] > fdmax)
- fdmax = gslots[i].fd[IN];
+ FD_APPEND(gslots[i].fd[IN]);
}
TAILQ_FOREACH(req, &reqhead, entry) {
- FD_SET(req->fd, &rfds);
- if(req->fd > fdmax)
- fdmax = req->fd;
+ FD_APPEND(req->fd);
}
TAILQ_FOREACH(f, &friendhead, entry) {
- /* Check cooldown state of file transfers */
+ /* File transfer cooldown */
if (f->tx.cooldown) {
clock_gettime(CLOCK_MONOTONIC, &curtime);
diff = timediff(f->tx.lastblock, curtime);
t@@ -1660,25 +1686,19 @@ loop(void)
/* Only monitor friends that are online */
if (tox_get_friend_connection_status(tox, f->num) == 1) {
- FD_SET(f->fd[FTEXT_IN], &rfds);
- if (f->fd[FTEXT_IN] > fdmax)
- fdmax = f->fd[FTEXT_IN];
+ FD_APPEND(f->fd[FTEXT_IN]);
+
if (f->tx.state == TRANSFER_NONE ||
(f->tx.state == TRANSFER_INPROGRESS && !f->tx.cooldown)) {
- FD_SET(f->fd[FFILE_IN], &rfds);
- if (f->fd[FFILE_IN] > fdmax)
- fdmax = f->fd[FFILE_IN];
+ FD_APPEND(f->fd[FFILE_IN]);
}
if (f->av.num < 0 ||
- (toxav_get_call_state(toxav, f->av.num) == av_CallActive && f->av.transmission)) {
- FD_SET(f->fd[FCALL_IN], &rfds);
- if (f->fd[FCALL_IN] > fdmax)
- fdmax = f->fd[FCALL_IN];
+ (toxav_get_call_state(toxav, f->av.num) == av_CallActive &&
+ f->av.state & TRANSMITTING)) {
+ FD_APPEND(f->fd[FCALL_IN]);
}
}
- FD_SET(f->fd[FREMOVE], &rfds);
- if (f->fd[FREMOVE] > fdmax)
- fdmax = f->fd[FREMOVE];
+ FD_APPEND(f->fd[FREMOVE]);
}
tv.tv_sec = 0;
t@@ -1690,9 +1710,7 @@ loop(void)
eprintf("select:");
}
- /* Check for broken transfers, i.e. the friend went offline
- * in the middle of a transfer or you close file_out.
- */
+ /* Check for broken transfers (friend went offline, file_out was closed) */
TAILQ_FOREACH(f, &friendhead, entry) {
if (tox_get_friend_connection_status(tox, f->num) == 0) {
canceltxtransfer(f);
t@@ -1734,22 +1752,20 @@ loop(void)
continue;
if (f->rxstate == TRANSFER_NONE)
continue;
- if (f->fd[FFILE_OUT] < 0) {
- r = openat(f->dirfd, ffiles[FFILE_OUT].name,
- ffiles[FFILE_OUT].flags, 0666);
- if (r < 0) {
- if (errno != ENXIO)
- eprintf("openat %s:", ffiles[FFILE_OUT].name);
+ if (f->fd[FFILE_OUT] >= 0)
+ continue;
+ r = openat(f->dirfd, ffiles[FFILE_OUT].name, ffiles[FFILE_OUT].flags);
+ if (r < 0) {
+ if (errno != ENXIO)
+ eprintf("openat %s:", ffiles[FFILE_OUT].name);
+ } else {
+ f->fd[FFILE_OUT] = r;
+ if (tox_file_send_control(tox, f->num, 1, 0, TOX_FILECONTROL_ACCEPT, NULL, 0) < 0) {
+ weprintf("Failed to accept transfer from receiver\n");
+ cancelrxtransfer(f);
} else {
- f->fd[FFILE_OUT] = r;
- if (tox_file_send_control(tox, f->num, 1, 0,
- TOX_FILECONTROL_ACCEPT, NULL, 0) < 0) {
- weprintf("Failed to accept transfer from receiver\n");
- cancelrxtransfer(f);
- } else {
- logmsg(": %s : Rx > Accepted\n", f->name);
- f->rxstate = TRANSFER_INPROGRESS;
- }
+ logmsg(": %s : Rx > Accepted\n", f->name);
+ f->rxstate = TRANSFER_INPROGRESS;
}
}
}
t@@ -1758,43 +1774,40 @@ loop(void)
TAILQ_FOREACH(f, &friendhead, entry) {
if (tox_get_friend_connection_status(tox, f->num) == 0)
continue;
- if (f->fd[FCALL_OUT] < 0) {
- r = openat(f->dirfd, ffiles[FCALL_OUT].name,
- ffiles[FCALL_OUT].flags, 0666);
+ if (f->av.num < 0)
+ continue;
+
+ switch (toxav_get_call_state(toxav, f->av.num)) {
+ case av_CallStarting:
+ r = toxav_answer(toxav, f->av.num, &toxavconfig);
if (r < 0) {
- if (errno != ENXIO)
- eprintf("openat %s:", ffiles[FCALL_OUT].name);
- continue;
- } else {
- f->fd[FCALL_OUT] = r;
+ weprintf("Failed to answer call\n");
+ r = toxav_reject(toxav, f->av.num, NULL);
+ if (r < 0)
+ weprintf("Failed to reject call\n");
}
- }
- if (f->av.num != -1) {
- switch (toxav_get_call_state(toxav, f->av.num)) {
- case av_CallStarting:
- r = toxav_answer(toxav, f->av.num, &toxavconfig);
- if (r < 0) {
- weprintf("Failed to answer call\n");
- r = toxav_reject(toxav, f->av.num, NULL);
- if (r < 0)
- weprintf("Failed to reject call\n");
- }
- break;
- case av_CallActive:
- fd = openat(f->dirfd, ffiles[FCALL_OUT].name, ffiles[FCALL_OUT].flags);
- if (fd < 0) {
- if (errno == ENXIO) {
- r = toxav_hangup(toxav, f->av.num);
- if (r < 0)
- weprintf("Failed to hang up\n");
- }
- } else {
+ break;
+ case av_CallActive:
+ fd = fifoopen(f->dirfd, ffiles[FCALL_OUT]);
+ if (fd < 0) {
+ f->av.state &= ~INCOMING;
+ close(fd);
+ } else {
+ f->av.state |= INCOMING;
+ if (f->fd[FCALL_OUT] >= 0)
close(fd);
- }
- break;
- default:
- break;
+ else
+ f->fd[FCALL_OUT] = fd;
+ }
+
+ if (!(f->av.state & INCOMING) && !(f->av.state & OUTGOING)) {
+ r = toxav_hangup(toxav, f->av.num);
+ if (r < 0)
+ weprintf("Failed to hang up\n");
}
+ break;
+ default:
+ break;
}
}
t@@ -1847,8 +1860,7 @@ loop(void)
switch (f->tx.state) {
case TRANSFER_NONE:
/* Prepare a new transfer */
- now = time(NULL);
- snprintf(tstamp, sizeof(tstamp), "%lu", (unsigned long)now);
+ snprintf(tstamp, sizeof(tstamp), "%lu", (unsigned long)time(NULL));
if (tox_new_file_sender(tox, f->num,
0, (uint8_t *)tstamp, strlen(tstamp)) < 0) {
weprintf("Failed to initiate new transfer\n");
t@@ -1872,9 +1884,11 @@ loop(void)
fiforeset(f->dirfd, &f->fd[FCALL_IN], ffiles[FCALL_IN]);
break;
}
+ f->av.state |= OUTGOING;
logmsg(": %s : Audio : Tx > Inviting\n", f->name);
break;
case av_CallActive:
+ f->av.state |= OUTGOING;
sendfriendcalldata(f);
break;
default:
t@@ -1946,11 +1960,11 @@ shutdown(void)
static void
usage(void)
{
- fprintf(stderr, "usage: %s [-4|-6] [-t] [-p]\n", argv0);
- fprintf(stderr, " -4\tIPv4 only\n");
- fprintf(stderr, " -6\tIPv6 only\n");
- fprintf(stderr, " -t\tEnable TCP mode (UDP by default)\n");
- fprintf(stderr, " -p\tEnable TCP socks5 proxy\n");
+ fprintf(stderr, "usage: %s [-4|-6] [-t] [-p]\n"
+ " -4\tIPv4 only\n"
+ " -6\tIPv6 only\n"
+ " -t\tEnable TCP mode (UDP by default)\n"
+ " -p\tEnable TCP socks5 proxy\n", argv0);
exit(1);
}