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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10
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11
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12 ssize_t ngx_unix_send(ngx_connection_t *c, u_char *buf, size_t size)
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13 {
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14 ssize_t n;
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15 ngx_err_t err;
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16 ngx_event_t *wev;
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17
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18 wev = c->write;
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19
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20 #if (HAVE_KQUEUE)
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21
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22 if ((ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) && wev->pending_eof) {
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23 ngx_log_error(NGX_LOG_INFO, c->log, wev->kq_errno,
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24 "kevent() reported about an closed connection");
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25
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26 wev->error = 1;
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27 return NGX_ERROR;
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28 }
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29
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30 #endif
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31
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32 for ( ;; ) {
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33 n = send(c->fd, buf, size, 0);
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34
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35 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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36 "send: fd:%d %d of %d", c->fd, n, size);
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37
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38 if (n > 0) {
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39 if (n < (ssize_t) size) {
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40 wev->ready = 0;
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41 }
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42
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43 return n;
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44 }
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45
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46 err = ngx_socket_errno;
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47
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48 if (n == 0) {
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49 ngx_log_error(NGX_LOG_ALERT, c->log, err, "send() returned zero");
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50 wev->ready = 0;
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51 return n;
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52 }
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53
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54 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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55 wev->ready = 0;
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56
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57 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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58 "send() not ready");
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59
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60 if (err == NGX_EAGAIN) {
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61 return NGX_AGAIN;
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62 }
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63
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64 } else {
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65 wev->error = 1;
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66 ngx_connection_error(c, err, "recv() failed");
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67 return NGX_ERROR;
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68 }
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69 }
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70 }
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