51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
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#include "network.h"
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network_status_t network_backend_write(connection *con, int fd, chunkqueue *cq, goffset *write_max) {
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const ssize_t blocksize = 16*1024; /* 16k */
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char *block_data;
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off_t block_len;
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ssize_t r;
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gboolean did_write_something = FALSE;
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chunkiter ci;
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do {
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if (0 == cq->length)
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return did_write_something ? NETWORK_STATUS_SUCCESS : NETWORK_STATUS_FATAL_ERROR;
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ci = chunkqueue_iter(cq);
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switch (chunkiter_read(con, ci, 0, blocksize, &block_data, &block_len)) {
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case HANDLER_GO_ON:
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break;
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case HANDLER_WAIT_FOR_FD:
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return did_write_something ? NETWORK_STATUS_SUCCESS : NETWORK_STATUS_WAIT_FOR_FD;
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case HANDLER_ERROR:
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default:
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return NETWORK_STATUS_FATAL_ERROR;
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}
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if (-1 == (r = net_write(fd, block_data, block_len))) {
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switch (errno) {
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case EAGAIN:
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#if EWOULDBLOCK != EAGAIN
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case EWOULDBLOCK:
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#endif
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return did_write_something ? NETWORK_STATUS_SUCCESS : NETWORK_STATUS_WAIT_FOR_EVENT;
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case ECONNRESET:
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case EPIPE:
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return NETWORK_STATUS_CONNECTION_CLOSE;
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default:
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CON_ERROR(con, "oops, write to fd=%d failed: %s", fd, g_strerror(errno));
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return NETWORK_STATUS_FATAL_ERROR;
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}
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} else if (0 == r) {
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return did_write_something ? NETWORK_STATUS_SUCCESS : NETWORK_STATUS_WAIT_FOR_EVENT;
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}
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chunkqueue_skip(cq, r);
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did_write_something = TRUE;
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*write_max -= r;
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} while (r == block_len && *write_max > 0);
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return NETWORK_STATUS_SUCCESS;
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}
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