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354
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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354
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_event.h>
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11
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12
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13 #if (NGX_HAVE_KQUEUE)
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14
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15 ssize_t
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16 ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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17 {
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18 ssize_t n;
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19 ngx_err_t err;
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20 ngx_event_t *rev;
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21
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22 rev = c->read;
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23
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24 do {
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25 n = recv(c->fd, buf, size, 0);
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26
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27 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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28 "recv: fd:%d %d of %d", c->fd, n, size);
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29
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30 if (n >= 0) {
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31 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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32 rev->available -= n;
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33
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34 /*
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35 * rev->available may be negative here because some additional
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36 * bytes may be received between kevent() and recv()
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37 */
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38
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39 if (rev->available <= 0) {
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40 rev->ready = 0;
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41 rev->available = 0;
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42 }
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43 }
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44
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45 return n;
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46 }
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47
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48 err = ngx_socket_errno;
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49
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50 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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51 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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52 "recv() not ready");
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53 n = NGX_AGAIN;
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54
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55 } else {
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56 n = ngx_connection_error(c, err, "recv() failed");
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57 break;
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58 }
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59
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60 } while (err == NGX_EINTR);
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61
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62 rev->ready = 0;
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63
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582
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64 if (n == NGX_ERROR) {
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354
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65 rev->error = 1;
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66 }
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67
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68 return n;
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69 }
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70
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71 #else /* ! NGX_HAVE_KQUEUE */
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72
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73 ssize_t
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74 ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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75 {
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76 ssize_t n;
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77 ngx_err_t err;
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78 ngx_event_t *rev;
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79
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80 rev = c->read;
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81
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82 do {
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83 n = recv(c->fd, buf, size, 0);
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84
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85 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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86 "recv: fd:%d %d of %d", c->fd, n, size);
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87
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88 if (n >= 0) {
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89 return n;
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90 }
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91
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92 err = ngx_socket_errno;
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93
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94 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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95 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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96 "recv() not ready");
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97 n = NGX_AGAIN;
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98
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99 } else {
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100 n = ngx_connection_error(c, err, "recv() failed");
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101 break;
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102 }
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103
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104 } while (err == NGX_EINTR);
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105
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106 rev->ready = 0;
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107
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582
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108 if (n == NGX_ERROR) {
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354
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109 rev->error = 1;
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110 }
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111
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112 return n;
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113 }
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114
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115 #endif /* NGX_HAVE_KQUEUE */
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