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#include "network_backends.h"
#include "network.h"
#include "fdevent.h"
#include "log.h"
#include "stat_cache.h"
#include "sys-socket.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif
int network_write_chunkqueue_write(server *srv, connection *con, int fd, chunkqueue *cq, off_t max_bytes) {
chunk *c;
for(c = cq->first; (max_bytes > 0) && (NULL != c); c = c->next) {
int chunk_finished = 0;
switch(c->type) {
case MEM_CHUNK: {
char * offset;
off_t toSend;
ssize_t r;
if (c->mem->used == 0) {
chunk_finished = 1;
break;
}
offset = c->mem->ptr + c->offset;
toSend = c->mem->used - 1 - c->offset;
if (toSend > max_bytes) toSend = max_bytes;
#ifdef __WIN32
if ((r = send(fd, offset, toSend, 0)) < 0) {
/* no error handling for windows... */
log_error_write(srv, __FILE__, __LINE__, "ssd", "send failed: ", strerror(errno), fd);
return -1;
}
#else
if ((r = write(fd, offset, toSend)) < 0) {
switch (errno) {
case EAGAIN:
case EINTR:
r = 0;
break;
case EPIPE:
case ECONNRESET:
return -2;
default:
log_error_write(srv, __FILE__, __LINE__, "ssd",
"write failed:", strerror(errno), fd);
return -1;
}
}
#endif
c->offset += r;
cq->bytes_out += r;
max_bytes -= r;
if (c->offset == (off_t)c->mem->used - 1) {
chunk_finished = 1;
}
break;
}
case FILE_CHUNK: {
#ifdef USE_MMAP
char *p = NULL;
#endif
ssize_t r;
off_t offset;
off_t toSend;
stat_cache_entry *sce = NULL;
int ifd;
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, c->file.name, &sce)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
strerror(errno), c->file.name);
return -1;
}
offset = c->file.start + c->offset;
toSend = c->file.length - c->offset;
if (toSend > max_bytes) toSend = max_bytes;
if (offset > sce->st.st_size) {
log_error_write(srv, __FILE__, __LINE__, "sb", "file was shrinked:", c->file.name);
return -1;
}
if (-1 == (ifd = open(c->file.name->ptr, O_RDONLY))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "open failed: ", strerror(errno));
return -1;
}
#ifdef USE_MMAP
if (MAP_FAILED == (p = mmap(0, sce->st.st_size, PROT_READ, MAP_SHARED, ifd, 0))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "mmap failed: ", strerror(errno));
close(ifd);
return -1;
}
close(ifd);
if ((r = write(fd, p + offset, toSend)) <= 0) {
switch (errno) {
case EAGAIN:
case EINTR:
r = 0;
break;
case EPIPE:
case ECONNRESET:
munmap(p, sce->st.st_size);
return -2;
default:
log_error_write(srv, __FILE__, __LINE__, "ssd",
"write failed:", strerror(errno), fd);
munmap(p, sce->st.st_size);
return -1;
}
}
munmap(p, sce->st.st_size);
#else /* USE_MMAP */
buffer_prepare_copy(srv->tmp_buf, toSend);
lseek(ifd, offset, SEEK_SET);
if (-1 == (toSend = read(ifd, srv->tmp_buf->ptr, toSend))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "read: ", strerror(errno));
close(ifd);
return -1;
}
close(ifd);
#ifdef __WIN32
if ((r = send(fd, srv->tmp_buf->ptr, toSend, 0)) < 0) {
/* no error handling for windows... */
log_error_write(srv, __FILE__, __LINE__, "ssd", "send failed: ", strerror(errno), fd);
return -1;
}
#else /* __WIN32 */
if ((r = write(fd, srv->tmp_buf->ptr, toSend)) < 0) {
switch (errno) {
case EAGAIN:
case EINTR:
r = 0;
break;
case EPIPE:
case ECONNRESET:
return -2;
default:
log_error_write(srv, __FILE__, __LINE__, "ssd",
"write failed:", strerror(errno), fd);
return -1;
}
}
#endif /* __WIN32 */
#endif /* USE_MMAP */
c->offset += r;
cq->bytes_out += r;
max_bytes -= r;
if (c->offset == c->file.length) {
chunk_finished = 1;
}
break;
}
default:
log_error_write(srv, __FILE__, __LINE__, "ds", c, "type not known");
return -1;
}
if (!chunk_finished) {
/* not finished yet */
break;
}
}
return 0;
}
#if 0
network_write_init(void) {
p->write = network_write_write_chunkset;
}
#endif
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