157 lines
3.9 KiB
C
157 lines
3.9 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 - 2021 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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#include "private-lib-system-dhcpclient.h"
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void
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lws_dhcpc_retry_write(struct lws_sorted_usec_list *sul)
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{
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lws_dhcpc_req_t *r = lws_container_of(sul, lws_dhcpc_req_t, sul_write);
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lwsl_debug("%s\n", __func__);
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if (r && r->wsi_raw)
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lws_callback_on_writable(r->wsi_raw);
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}
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static void
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lws_dhcpc_destroy(lws_dhcpc_req_t **pr)
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{
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lws_dhcpc_req_t *r = *pr;
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lws_sul_cancel(&r->sul_conn);
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lws_sul_cancel(&r->sul_write);
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lws_sul_cancel(&r->sul_renew);
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if (r->wsi_raw)
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lws_set_timeout(r->wsi_raw, 1, LWS_TO_KILL_ASYNC);
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lws_dll2_remove(&r->list);
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lws_free_set_NULL(r);
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}
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int
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lws_dhcpc_status(struct lws_context *context, lws_sockaddr46 *sa46)
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{
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lws_dhcpc_req_t *r;
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lws_start_foreach_dll(struct lws_dll2 *, p, context->dhcpc_owner.head) {
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r = (lws_dhcpc_req_t *)p;
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if (r->state == LDHC_BOUND) {
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if (sa46) {
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memcpy(sa46, &r->is.sa46[LWSDH_SA46_DNS_SRV_1],
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sizeof(*sa46));
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}
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return 1;
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}
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} lws_end_foreach_dll(p);
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return 0;
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}
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static lws_dhcpc_req_t *
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lws_dhcpc_find(struct lws_context *context, const char *iface, int af)
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{
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lws_dhcpc_req_t *r;
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/* see if we are already looking after this af / iface combination */
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lws_start_foreach_dll(struct lws_dll2 *, p, context->dhcpc_owner.head) {
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r = (lws_dhcpc_req_t *)p;
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if (!strcmp((const char *)&r[1], iface) && af == r->af)
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return r; /* yes... */
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} lws_end_foreach_dll(p);
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return NULL;
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}
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/*
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* Create a persistent dhcp client entry for network interface "iface" and AF
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* type "af"
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*/
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int
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lws_dhcpc_request(struct lws_context *context, const char *iface, int af,
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dhcpc_cb_t cb, void *opaque)
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{
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lws_dhcpc_req_t *r = lws_dhcpc_find(context, iface, af);
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int n;
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/* see if we are already looking after this af / iface combination */
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if (r)
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return 0;
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/* nope... let's create a request object as he asks */
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n = (int)strlen(iface);
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r = lws_zalloc(sizeof(*r) + (unsigned int)n + 1u, __func__);
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if (!r)
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return 1;
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memcpy(&r[1], iface, (unsigned int)n + 1);
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r->af = (uint8_t)af;
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r->cb = cb;
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r->opaque = opaque;
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r->context = context;
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r->state = LDHC_INIT;
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lws_strncpy(r->is.ifname, iface, sizeof(r->is.ifname));
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lws_dll2_add_head(&r->list, &context->dhcpc_owner); /* add him to list */
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lws_dhcpc4_retry_conn(&r->sul_conn);
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return 0;
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}
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/*
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* Destroy every DHCP client object related to interface "iface"
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*/
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static int
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_remove_if(struct lws_dll2 *d, void *opaque)
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{
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lws_dhcpc_req_t *r = lws_container_of(d, lws_dhcpc_req_t, list);
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if (!opaque || !strcmp((const char *)&r[1], (const char *)opaque))
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lws_dhcpc_destroy(&r);
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return 0;
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}
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int
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lws_dhcpc_remove(struct lws_context *context, const char *iface)
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{
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lws_dll2_foreach_safe(&context->dhcpc_owner, (void *)iface, _remove_if);
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return 0;
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}
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