lighttpd 1.4.x https://www.lighttpd.net/
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#include "first.h"
#include "network_backends.h"
#include "network.h"
#include "fdevent.h"
#include "log.h"
#include "stat_cache.h"
#include "sys-socket.h"
#include <sys/time.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
int network_open_file_chunk(server *srv, connection *con, chunkqueue *cq) {
chunk* const c = cq->first;
off_t offset, toSend;
struct stat st;
UNUSED(con);
force_assert(NULL != c);
force_assert(FILE_CHUNK == c->type);
force_assert(c->offset >= 0 && c->offset <= c->file.length);
offset = c->file.start + c->offset;
toSend = c->file.length - c->offset;
if (-1 == c->file.fd) {
if (-1 == (c->file.fd = fdevent_open_cloexec(c->file.name->ptr, O_RDONLY, 0))) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "open failed:", strerror(errno), c->file.name);
return -1;
}
}
/*(skip file size checks if file is temp file created by lighttpd)*/
if (c->file.is_temp) return 0;
if (-1 == fstat(c->file.fd, &st)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "fstat failed:", strerror(errno));
return -1;
}
if (offset > st.st_size || toSend > st.st_size || offset > st.st_size - toSend) {
log_error_write(srv, __FILE__, __LINE__, "sb", "file shrunk:", c->file.name);
return -1;
}
return 0;
}
int network_write_file_chunk_no_mmap(server *srv, connection *con, int fd, chunkqueue *cq, off_t *p_max_bytes) {
chunk* const c = cq->first;
off_t offset, toSend;
ssize_t r;
force_assert(NULL != c);
force_assert(FILE_CHUNK == c->type);
force_assert(c->offset >= 0 && c->offset <= c->file.length);
offset = c->file.start + c->offset;
toSend = c->file.length - c->offset;
if (toSend > 64*1024) toSend = 64*1024; /* max read 64kb in one step */
if (toSend > *p_max_bytes) toSend = *p_max_bytes;
if (0 == toSend) {
chunkqueue_remove_finished_chunks(cq);
return 0;
}
if (0 != network_open_file_chunk(srv, con, cq)) return -1;
buffer_string_prepare_copy(srv->tmp_buf, toSend);
if (-1 == lseek(c->file.fd, offset, SEEK_SET)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "lseek: ", strerror(errno));
return -1;
}
if (-1 == (toSend = read(c->file.fd, srv->tmp_buf->ptr, toSend))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "read: ", strerror(errno));
return -1;
}
#if defined(__WIN32)
if ((r = send(fd, srv->tmp_buf->ptr, toSend, 0)) < 0) {
int lastError = WSAGetLastError();
switch (lastError) {
case WSAEINTR:
case WSAEWOULDBLOCK:
break;
case WSAECONNRESET:
case WSAETIMEDOUT:
case WSAECONNABORTED:
return -2;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd",
"send failed: ", lastError, fd);
return -1;
}
}
#else /* __WIN32 */
if ((r = write(fd, srv->tmp_buf->ptr, toSend)) < 0) {
switch (errno) {
case EAGAIN:
case EINTR:
break;
case EPIPE:
case ECONNRESET:
return -2;
default:
log_error_write(srv, __FILE__, __LINE__, "ssd",
"write failed:", strerror(errno), fd);
return -1;
}
}
#endif /* __WIN32 */
if (r >= 0) {
*p_max_bytes -= r;
chunkqueue_mark_written(cq, r);
}
return (r > 0 && r == toSend) ? 0 : -3;
}