src/server/util/io.c

Sun, 26 May 2013 22:05:41 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 26 May 2013 22:05:41 +0200
changeset 67
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parent 66
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child 69
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dynamic thread pool

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #ifdef __gnu_linux__
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30 #define _GNU_SOURCE
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31 #endif
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32
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33 #include <unistd.h>
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34 #include <stdlib.h>
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35 #include <sys/uio.h>
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36 #include <sys/sendfile.h>
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37 #include <limits.h> /* asprintf */
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38
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39 #include "../daemon/vfs.h"
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40 #include "io.h"
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41 #include "pool.h"
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42
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43 IOStream native_io_funcs = {
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44 system_write,
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45 system_writev,
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46 system_read,
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47 NULL
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48 };
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49
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50 IOStream net_io_funcs = {
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51 (io_write_f)net_stream_write,
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52 (io_writev_f)net_stream_writev,
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53 (io_read_f)net_stream_read,
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54 (io_sendfile_f)net_stream_sendfile
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55 };
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56
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57
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58 IOStream* stream_new_from_fd(pool_handle_t *pool, int fd) {
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59 SystemIOStream *st = pool_malloc(pool, sizeof(SystemIOStream));
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60 st->st = native_io_funcs;
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61 st->fd = fd;
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62 return (IOStream*)st;
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63 }
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65 ssize_t system_write(IOStream *st, void *buf, size_t nbytes) {
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66 return write(((SystemIOStream*)st)->fd, buf, nbytes);
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67 }
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68
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69 ssize_t system_writev(IOStream *st, struct iovec *iovec, int iovcnt) {
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70 return writev(((SystemIOStream*)st)->fd, iovec, iovcnt);
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71 }
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72
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73 ssize_t system_read(IOStream *st, void *buf, size_t nbytes) {
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74 return read(((SystemIOStream*)st)->fd, buf, nbytes);
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75 }
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77
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78 IOStream* net_stream_from_fd(pool_handle_t *pool, int fd) {
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79 NetIOStream *st = pool_malloc(pool, sizeof(NetIOStream));
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80 st->st = net_io_funcs;
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81 st->fd = fd;
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82 st->max_read = 0;
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83 st->read = 0;
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84 st->chunked_enc = 0;
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85 st->buffered = 0;
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86 return (IOStream*)st;
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87 }
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88
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89 ssize_t net_stream_write(NetIOStream *st, void *buf, size_t nbytes) {
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90 if(st->chunked_enc) {
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91 // TODO: on some plattforms iov_len is smaller than size_t
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92 struct iovec io[2];
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93 char chunk_len[16];
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94 io[0].iov_base = chunk_len;
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95 io[0].iov_len = snprintf(chunk_len, 16, "\n%x\r\n", nbytes);
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96 io[1].iov_base = buf;
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97 io[1].iov_len = nbytes;
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98 ssize_t r = writev(st->fd, io, 2);
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99 return r - io[0].iov_len;
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100 } else {
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101 return write(st->fd, buf, nbytes);
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102 }
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103 }
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104
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105 ssize_t net_stream_writev(NetIOStream *st, struct iovec *iovec, int iovcnt) {
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106 if(st->chunked_enc) {
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107 struct iovec *io = calloc(iovcnt + 1, sizeof(struct iovec));
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108 char chunk_len[16];
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109 io[0].iov_base = chunk_len;
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110 size_t len = 0;
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111 for(int i=0;i<iovcnt;i++) {
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112 len += iovec[i].iov_len;
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113 }
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114 io[0].iov_len = snprintf(chunk_len, 16, "\n%x\r\n", len);
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115 memcpy(io + 1, iovec, iovcnt * sizeof(struct iovec));
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116 ssize_t r = writev(st->fd, io, iovcnt + 1);
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117 return r - io[0].iov_len;
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118 } else {
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119 return writev(st->fd, iovec, iovcnt);
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120 }
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121 }
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122
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123 ssize_t net_stream_read(NetIOStream *st, void *buf, size_t nbytes) {
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124 if(st->max_read != 0 && st->read >= st->max_read) {
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125 return 0;
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126 }
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127 ssize_t r = read(st->fd, buf, nbytes);
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128 st->read += r;
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129 return r;
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130 }
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131
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132 ssize_t net_stream_sendfile(NetIOStream *st, sendfiledata *sfd) {
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133 // TODO: header and trailer
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134 ssize_t ret = 0;
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135 off_t fileoffset = sfd->offset;
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136 if(sfd->fd->fd != -1) {
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137 ret = sendfile(st->fd, sfd->fd->fd, &fileoffset, sfd->len);
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138 } else {
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139 // TODO: regular copy
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140 fprintf(stderr, "sendfile not implemented for SYS_FILE\n");
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141 }
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142
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143 return ret;
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144 }
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145
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147 ssize_t net_read(SYS_NETFD fd, void *buf, size_t nbytes) {
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148 ssize_t r = ((IOStream*)fd)->read(fd, buf, nbytes);
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diff changeset
149 if(r == 0) {
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diff changeset
150 return IO_EOF;
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parents: 4
diff changeset
151 }
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diff changeset
152 return r;
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diff changeset
153 }
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diff changeset
154
9
30e51941a673 Added mod_jk dependencies
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diff changeset
155 ssize_t net_write(SYS_NETFD fd, void *buf, size_t nbytes) {
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diff changeset
156 ssize_t r = ((IOStream*)fd)->write(fd, buf, nbytes);
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diff changeset
157 if(r < 0) {
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diff changeset
158 return IO_ERROR;
20
7b235fa88008 Some fixes for mod_jk
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diff changeset
159 }
9
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diff changeset
160 return r;
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parents: 8
diff changeset
161 }
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diff changeset
162
64
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diff changeset
163 ssize_t net_writev(SYS_NETFD fd, struct iovec *iovec, int iovcnt) {
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164 ssize_t r = ((IOStream*)fd)->writev(fd, iovec, iovcnt);
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diff changeset
165 if(r < 0) {
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diff changeset
166 return IO_ERROR;
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diff changeset
167 }
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diff changeset
168 return r;
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diff changeset
169 }
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diff changeset
170
23
a2c8fc23c90e Added basic authentication
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diff changeset
171 ssize_t net_printf(SYS_NETFD fd, char *format, ...) {
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diff changeset
172 va_list arg;
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diff changeset
173 va_start(arg, format);
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174 char *buf;
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diff changeset
175 ssize_t len = vasprintf(&buf, format, arg);
64
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diff changeset
176 ssize_t r = net_write(fd, buf, len);
23
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diff changeset
177 free(buf);
64
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diff changeset
178 return r;
23
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diff changeset
179 }
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diff changeset
180
54
3a1d5a52adfc new vfs api
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diff changeset
181 ssize_t net_sendfile(SYS_NETFD fd, sendfiledata *sfd) {
66
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182 NetIOStream *out = fd;
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183 if(out->st.sendfile && sfd->fd && sfd->fd->fd != -1) {
54
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184 ssize_t r = ((IOStream*)fd)->sendfile(fd, sfd);
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185 if(r < 0) {
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diff changeset
186 return IO_ERROR;
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diff changeset
187 }
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diff changeset
188 } else {
66
74babc0082b7 added authentication cache
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diff changeset
189 // stream/file does not support sendfile
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190 // do regular copy
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191 char *buf = malloc(4096);
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diff changeset
192 if(!buf) {
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diff changeset
193 // TODO: out of memory error
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diff changeset
194 return IO_ERROR;
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diff changeset
195 }
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diff changeset
196 char *header = (char*)sfd->header;
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diff changeset
197 int hlen = sfd->hlen;
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198 char *trailer = (char*)sfd->trailer;
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diff changeset
199 int tlen = sfd->tlen;
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diff changeset
200 if(header == NULL) {
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diff changeset
201 hlen = 0;
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diff changeset
202 }
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diff changeset
203 if(trailer == NULL) {
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diff changeset
204 tlen = 0;
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diff changeset
205 }
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diff changeset
206
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diff changeset
207 ssize_t r;
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diff changeset
208 while(hlen > 0) {
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diff changeset
209 r = out->st.write(fd, header, hlen);
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diff changeset
210 header += r;
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diff changeset
211 hlen -= r;
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diff changeset
212 if(r <= 0) {
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diff changeset
213 free(buf);
74babc0082b7 added authentication cache
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diff changeset
214 return IO_ERROR;
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parents: 65
diff changeset
215 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
216 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
217
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diff changeset
218 if(system_lseek(sfd->fd, sfd->offset, SEEK_SET) == -1) {
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diff changeset
219 free(buf);
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diff changeset
220 return IO_ERROR;
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parents: 65
diff changeset
221 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
222
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diff changeset
223 size_t length = sfd->len;
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diff changeset
224 while(length > 0) {
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parents: 65
diff changeset
225 if((r = system_fread(sfd->fd, buf, 4096)) <= 0) {
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diff changeset
226 break;
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parents: 65
diff changeset
227 }
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diff changeset
228 char *write_buf = buf;
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diff changeset
229 while(r > 0) {
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diff changeset
230 ssize_t w = out->st.write(fd, write_buf, r);
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diff changeset
231 r -= w;
74babc0082b7 added authentication cache
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parents: 65
diff changeset
232 length -= w;
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parents: 65
diff changeset
233 write_buf += w;
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parents: 65
diff changeset
234 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
235 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
236 free(buf);
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parents: 65
diff changeset
237 if(length > 0) {
74babc0082b7 added authentication cache
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parents: 65
diff changeset
238 return IO_ERROR;
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parents: 65
diff changeset
239 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
240
74babc0082b7 added authentication cache
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parents: 65
diff changeset
241 while(tlen > 0) {
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parents: 65
diff changeset
242 r = out->st.write(fd, trailer, tlen);
74babc0082b7 added authentication cache
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parents: 65
diff changeset
243 trailer += r;
74babc0082b7 added authentication cache
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parents: 65
diff changeset
244 tlen -= r;
74babc0082b7 added authentication cache
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parents: 65
diff changeset
245 if(r <= 0) {
74babc0082b7 added authentication cache
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parents: 65
diff changeset
246 return IO_ERROR;
74babc0082b7 added authentication cache
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parents: 65
diff changeset
247 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
248 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
249
74babc0082b7 added authentication cache
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parents: 65
diff changeset
250 return sfd->hlen + sfd->len + sfd->tlen;
54
3a1d5a52adfc new vfs api
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parents: 46
diff changeset
251 }
3a1d5a52adfc new vfs api
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parents: 46
diff changeset
252 return IO_ERROR;
3a1d5a52adfc new vfs api
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parents: 46
diff changeset
253 }
3a1d5a52adfc new vfs api
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parents: 46
diff changeset
254
8
f4d56bf9de40 Added request body reader
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parents: 4
diff changeset
255
4
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
256 /* iovec buffer */
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parents: 1
diff changeset
257 iovec_buf_t *iovec_buf_create(pool_handle_t *pool) {
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parents: 1
diff changeset
258 iovec_buf_t *buf = pool_malloc(pool, sizeof(iovec_buf_t));
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
259
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parents: 1
diff changeset
260 buf->pool = pool;
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parents: 1
diff changeset
261 buf->iov = pool_calloc(pool, 32, sizeof(struct iovec));
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parents: 1
diff changeset
262 buf->maxiovec = 32;
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parents: 1
diff changeset
263 buf->iovctn = 0;
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parents: 1
diff changeset
264
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
265 return buf;
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parents: 1
diff changeset
266 }
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
267
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parents: 1
diff changeset
268 void iovec_buf_write(iovec_buf_t *io, void *buf, size_t nbyte) {
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
269 if(io->iovctn >= io->maxiovec) {
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parents: 1
diff changeset
270 io->iov = pool_realloc(
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parents: 1
diff changeset
271 io->pool,
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parents: 1
diff changeset
272 io->iov,
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parents: 1
diff changeset
273 (io->maxiovec + 16) * sizeof(struct iovec));
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parents: 1
diff changeset
274 }
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
275
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
276 io->iov[io->iovctn].iov_base = buf;
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parents: 1
diff changeset
277 io->iov[io->iovctn].iov_len = nbyte;
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parents: 1
diff changeset
278 io->iovctn++;
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parents: 1
diff changeset
279 }
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
280
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parents: 1
diff changeset
281 ssize_t iovec_buf_flush(iovec_buf_t *io, int fd) {
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parents: 1
diff changeset
282 return writev(fd, io->iov, io->iovctn);
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parents: 1
diff changeset
283 }
32
ebba53de8b18 added solaris 10 support
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diff changeset
284
ebba53de8b18 added solaris 10 support
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diff changeset
285
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parents: 25
diff changeset
286 /* TODO: add asprintf to new file */
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diff changeset
287
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diff changeset
288 /*
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diff changeset
289 * asprintf implementation for Solaris 10
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diff changeset
290 * source from OpenSolaris
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diff changeset
291 * file: /onnv/onnv-gate/usr/src/lib/libc/port/print/asprintf.c
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diff changeset
292 */
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diff changeset
293
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parents: 25
diff changeset
294 /*
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parents: 25
diff changeset
295 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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diff changeset
296 * Use is subject to license terms.
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diff changeset
297 */
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diff changeset
298
ebba53de8b18 added solaris 10 support
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diff changeset
299 /*
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parents: 25
diff changeset
300 * Copyright (c) 2004 Darren Tucker.
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diff changeset
301 *
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diff changeset
302 * Based originally on asprintf.c from OpenBSD:
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diff changeset
303 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
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diff changeset
304 *
ebba53de8b18 added solaris 10 support
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parents: 25
diff changeset
305 * Permission to use, copy, modify, and distribute this software for any
ebba53de8b18 added solaris 10 support
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diff changeset
306 * purpose with or without fee is hereby granted, provided that the above
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307 * copyright notice and this permission notice appear in all copies.
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308 *
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309 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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310 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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311 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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312 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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313 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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314 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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315 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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316 */
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317
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318 #ifdef __SunOS_5_10
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319
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320 #define INIT_SZ 128
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321
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322 /* VARARGS2 */
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323 int
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324 vasprintf(char **str, const char *format, va_list ap)
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325 {
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326 char string[INIT_SZ];
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327 char *newstr;
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328 int ret;
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329 size_t len;
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330
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331 *str = NULL;
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332 ret = vsnprintf(string, INIT_SZ, format, ap);
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333 if (ret < 0) /* retain the value of errno from vsnprintf() */
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334 return (-1);
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335 if (ret < INIT_SZ) {
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336 len = ret + 1;
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337 if ((newstr = malloc(len)) == NULL)
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338 return (-1); /* retain errno from malloc() */
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339 (void) strlcpy(newstr, string, len);
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340 *str = newstr;
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341 return (ret);
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342 }
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343 /*
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344 * We will perform this loop more than once only if some other
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345 * thread modifies one of the vasprintf() arguments after our
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346 * previous call to vsnprintf().
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347 */
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348 for (;;) {
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349 if (ret == INT_MAX) { /* Bad length */
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350 errno = ENOMEM;
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351 return (-1);
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352 }
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353 len = ret + 1;
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354 if ((newstr = malloc(len)) == NULL)
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355 return (-1); /* retain errno from malloc() */
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356 ret = vsnprintf(newstr, len, format, ap);
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357 if (ret < 0) { /* retain errno from vsnprintf() */
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358 free(newstr);
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359 return (-1);
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360 }
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361 if (ret < len) {
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362 *str = newstr;
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363 return (ret);
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364 }
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365 free(newstr);
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366 }
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367 }
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368
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369 int
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370 asprintf(char **str, const char *format, ...)
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371 {
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372 va_list ap;
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373 int ret;
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374
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375 *str = NULL;
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376 va_start(ap, format);
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377 ret = vasprintf(str, format, ap);
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378 va_end(ap);
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379
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380 return (ret);
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381 }
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382
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383 #endif

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