You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

119 lines
3.0 KiB

#include <lighttpd/base.h>
#include <lighttpd/plugin_core.h>
/** repeats write after EINTR */
ssize_t li_net_write(int fd, void *buf, ssize_t nbyte) {
ssize_t r;
while (-1 == (r = write(fd, buf, nbyte))) {
switch (errno) {
case EINTR:
/* Try again */
break;
default:
/* report error */
return r;
}
}
/* return bytes written */
return r;
}
/** repeats read after EINTR */
ssize_t li_net_read(int fd, void *buf, ssize_t nbyte) {
ssize_t r;
while (-1 == (r = read(fd, buf, nbyte))) {
switch (errno) {
case EINTR:
/* Try again */
break;
default:
/* report error */
return r;
}
}
/* return bytes read */
return r;
}
liNetworkStatus li_network_write(liVRequest *vr, int fd, liChunkQueue *cq, goffset write_max) {
liNetworkStatus res;
#ifdef TCP_CORK
int corked = 0;
#endif
goffset write_bytes, wrote;
#ifdef TCP_CORK
/* Linux: put a cork into the socket as we want to combine the write() calls
* but only if we really have multiple chunks
*/
if (cq->queue->length > 1) {
corked = 1;
setsockopt(fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
}
#endif
write_bytes = write_max;
/* TODO: add setup-option to select the backend */
#ifdef USE_SENDFILE
res = li_network_write_sendfile(vr, fd, cq, &write_bytes);
#else
res = li_network_write_writev(vr, fd, cq, &write_bytes);
#endif
wrote = write_max - write_bytes;
if (wrote > 0 && res == LI_NETWORK_STATUS_WAIT_FOR_EVENT) res = LI_NETWORK_STATUS_SUCCESS;
#ifdef TCP_CORK
if (corked) {
corked = 0;
setsockopt(fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
}
#endif
return res;
}
liNetworkStatus li_network_read(liVRequest *vr, int fd, liChunkQueue *cq) {
const ssize_t blocksize = 16*1024; /* 16k */
off_t max_read = 16 * blocksize; /* 256k */
ssize_t r;
off_t len = 0;
if (cq->limit && cq->limit->limit > 0) {
if (max_read > cq->limit->limit - cq->limit->current) {
max_read = cq->limit->limit - cq->limit->current;
if (max_read <= 0) {
max_read = 0; /* we still have to read something */
VR_ERROR(vr, "%s", "li_network_read: fd should be disabled as chunkqueue is already full");
}
}
}
do {
GByteArray *buf = g_byte_array_sized_new(blocksize);
g_byte_array_set_size(buf, blocksize);
if (-1 == (r = li_net_read(fd, buf->data, blocksize))) {
g_byte_array_free(buf, TRUE);
switch (errno) {
case EAGAIN:
#if EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
return len ? LI_NETWORK_STATUS_SUCCESS : LI_NETWORK_STATUS_WAIT_FOR_EVENT;
case ECONNRESET:
return LI_NETWORK_STATUS_CONNECTION_CLOSE;
default:
VR_ERROR(vr, "oops, read from fd=%d failed: %s", fd, g_strerror(errno) );
return LI_NETWORK_STATUS_FATAL_ERROR;
}
} else if (0 == r) {
g_byte_array_free(buf, TRUE);
return len ? LI_NETWORK_STATUS_SUCCESS : LI_NETWORK_STATUS_CONNECTION_CLOSE;
}
g_byte_array_set_size(buf, r);
li_chunkqueue_append_bytearr(cq, buf);
len += r;
} while (r == blocksize && len < max_read);
return LI_NETWORK_STATUS_SUCCESS;
}