mirror of
https://github.com/warmcat/libwebsockets.git
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138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <private-lib-core.h>
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#if defined(LWS_WITH_NETWORK)
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static const char *hex = "0123456789ABCDEF";
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#endif
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int
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lws_system_get_info(struct lws_context *context, lws_system_item_t item,
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lws_system_arg_t *arg)
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{
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if (!context->system_ops || !context->system_ops->get_info)
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return 1;
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return context->system_ops->get_info(item, arg);
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}
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const lws_system_ops_t *
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lws_system_get_ops(struct lws_context *context)
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{
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return context->system_ops;
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}
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#if defined(LWS_WITH_NETWORK)
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int
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lws_system_auth_default_cb(struct lws_context *context, int idx, size_t ofs,
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uint8_t *buf, size_t *plen, lws_system_auth_op_t op)
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{
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int n;
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if (idx >= (int)LWS_ARRAY_SIZE(context->auth_token))
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return -1;
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switch (op) {
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case LWSSYS_AUTH_GET:
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if (!context->auth_token[idx])
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return -1;
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if (!buf) /* we just need to tell him that it exists */
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return -2;
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n = lws_buflist_linear_copy(&context->auth_token[idx], ofs, buf,
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*plen);
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if (n < 0)
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return -2;
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*plen = (size_t)n;
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return 0;
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case LWSSYS_AUTH_TOTAL_LENGTH:
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*plen = lws_buflist_total_len(&context->auth_token[idx]);
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return 0;
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case LWSSYS_AUTH_APPEND:
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if (lws_buflist_append_segment(&context->auth_token[idx], buf,
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*plen) < 0)
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return -1;
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return 0;
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case LWSSYS_AUTH_FREE:
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lws_buflist_destroy_all_segments(&context->auth_token[idx]);
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return 0;
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default:
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break;
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}
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return -1;
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}
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int
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lws_system_get_auth(struct lws_context *context, int idx, size_t ofs,
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uint8_t *buf, size_t buflen, int flags)
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{
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size_t bl = buflen;
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uint8_t *p, b;
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int n;
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if (!context->system_ops || !context->system_ops->auth)
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n = lws_system_auth_default_cb(context, idx, ofs, buf, &buflen, 0);
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else
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n = context->system_ops->auth(context, idx, ofs, buf, &buflen, 0);
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if (n < 0) {
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if (buf)
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lwsl_err("%s: auth get failed\n", __func__);
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return -1;
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}
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if (buf && (flags & LWSSYSGAUTH_HEX)) {
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if (bl < (buflen * 2) + 1) {
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lwsl_err("%s: auth in hex oversize %d\n", __func__,
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(int)bl);
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return -1;
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}
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/* convert to ascii hex inplace, backwards */
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p = buf + (buflen * 2);
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*p = '\0'; /* terminating NUL */
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for (n = (int)buflen - 1; n >= 0; n--) {
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p -= 2;
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b = buf[n];
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p[0] = hex[(b >> 4) & 0xf];
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p[1] = hex[b & 0xf];
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}
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buflen = (buflen * 2);
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}
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return (int)buflen;
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}
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#endif
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