Daniele Lacamera / PicoTCP Featured

Free (GPLv2) TCP/IP stack developed by TASS Belgium

Dependents:   lpc1768-picotcp-demo ZeroMQ_PicoTCP_Publisher_demo TCPSocket_HelloWorld_PicoTCP Pico_TCP_UDP_Test ... more

PicoTCP. Copyright (c) 2013 TASS Belgium NV.

Released under the GNU General Public License, version 2.

Different licensing models may exist, at the sole discretion of the Copyright holders.

Official homepage: http://www.picotcp.com

Bug tracker: https://github.com/tass-belgium/picotcp/issues

Development steps:

  • initial integration with mbed RTOS
  • generic mbed Ethernet driver
  • high performance NXP LPC1768 specific Ethernet driver
  • Multi-threading support for mbed RTOS
  • Berkeley sockets and integration with the New Socket API
  • Fork of the apps running on top of the New Socket API
  • Scheduling optimizations
  • Debugging/benchmarking/testing

Demo application (measuring TCP sender performance):

Import programlpc1768-picotcp-demo

A PicoTCP demo app testing the ethernet throughput on the lpc1768 mbed board.

Last commit 17 May 2013 by TASS Belgium

modules/pico_dhcp_server.c@51:ab4529a384a6, 2013-09-02 (annotated)

Committer:
tass
Date:
Mon Sep 02 08:02:21 2013 +0000
Revision:
51:ab4529a384a6
Parent:
29:1a47b7151851
Child:
63:97f481e33cb2
Updated from masterbranch

Who changed what in which revision?

UserRevisionLine numberNew contents of line
daniele 29:1a47b7151851 1 /*********************************************************************
daniele 29:1a47b7151851 2 PicoTCP. Copyright (c) 2012 TASS Belgium NV. Some rights reserved.
daniele 29:1a47b7151851 3 See LICENSE and COPYING for usage.
daniele 29:1a47b7151851 4
daniele 29:1a47b7151851 5
daniele 29:1a47b7151851 6 Authors: Frederik Van Slycken, Kristof Roelants
daniele 29:1a47b7151851 7 *********************************************************************/
daniele 29:1a47b7151851 8
daniele 29:1a47b7151851 9 #ifdef PICO_SUPPORT_DHCPD
daniele 29:1a47b7151851 10 #include "pico_dhcp_server.h"
daniele 29:1a47b7151851 11 #include "pico_config.h"
daniele 29:1a47b7151851 12 #include "pico_addressing.h"
daniele 29:1a47b7151851 13 #include "pico_socket.h"
tass 51:ab4529a384a6 14 #include "pico_udp.h"
tass 51:ab4529a384a6 15 #include "pico_stack.h"
daniele 29:1a47b7151851 16 #include "pico_arp.h"
tass 51:ab4529a384a6 17
tass 51:ab4529a384a6 18 #define dhcps_dbg(...) do{}while(0)
tass 51:ab4529a384a6 19 //#define dhcps_dbg dbg
tass 51:ab4529a384a6 20
tass 51:ab4529a384a6 21 /* default configurations */
tass 51:ab4529a384a6 22 #define DHCP_SERVER_OPENDNS long_be(0xd043dede) /* OpenDNS DNS server 208.67.222.222 */
tass 51:ab4529a384a6 23 #define DHCP_SERVER_POOL_START long_be(0x00000064)
tass 51:ab4529a384a6 24 #define DHCP_SERVER_POOL_END long_be(0x000000fe)
tass 51:ab4529a384a6 25 #define DHCP_SERVER_LEASE_TIME long_be(0x00000078)
tass 51:ab4529a384a6 26
tass 51:ab4529a384a6 27 /* maximum size of a DHCP message */
tass 51:ab4529a384a6 28 #define DHCP_SERVER_MAXMSGSIZE (PICO_IP_MTU - sizeof(struct pico_ipv4_hdr) - sizeof(struct pico_udp_hdr))
tass 51:ab4529a384a6 29
tass 51:ab4529a384a6 30 #define ip_inrange(x) ((long_be(x) >= long_be(dhcpn->dhcps->pool_start)) && (long_be(x) <= long_be(dhcpn->dhcps->pool_end)))
daniele 29:1a47b7151851 31
tass 51:ab4529a384a6 32 enum dhcp_server_state {
tass 51:ab4529a384a6 33 PICO_DHCP_STATE_DISCOVER = 0,
tass 51:ab4529a384a6 34 PICO_DHCP_STATE_OFFER,
tass 51:ab4529a384a6 35 PICO_DHCP_STATE_REQUEST,
tass 51:ab4529a384a6 36 PICO_DHCP_STATE_BOUND,
tass 51:ab4529a384a6 37 PICO_DHCP_STATE_RENEWING
tass 51:ab4529a384a6 38 };
daniele 29:1a47b7151851 39
tass 51:ab4529a384a6 40 struct pico_dhcp_server_negotiation {
tass 51:ab4529a384a6 41 uint32_t xid;
tass 51:ab4529a384a6 42 enum dhcp_server_state state;
tass 51:ab4529a384a6 43 struct pico_dhcp_server_setting *dhcps;
tass 51:ab4529a384a6 44 struct pico_ip4 ciaddr;
tass 51:ab4529a384a6 45 struct pico_eth hwaddr;
tass 51:ab4529a384a6 46 };
tass 51:ab4529a384a6 47
tass 51:ab4529a384a6 48 static void pico_dhcpd_wakeup(uint16_t ev, struct pico_socket *s);
daniele 29:1a47b7151851 49
daniele 29:1a47b7151851 50 static int dhcp_settings_cmp(void *ka, void *kb)
daniele 29:1a47b7151851 51 {
tass 51:ab4529a384a6 52 struct pico_dhcp_server_setting *a = ka, *b = kb;
tass 51:ab4529a384a6 53 if (a->dev == b->dev)
daniele 29:1a47b7151851 54 return 0;
tass 51:ab4529a384a6 55 return (a->dev < b->dev) ? -1 : 1;
daniele 29:1a47b7151851 56 }
daniele 29:1a47b7151851 57 PICO_TREE_DECLARE(DHCPSettings, dhcp_settings_cmp);
daniele 29:1a47b7151851 58
daniele 29:1a47b7151851 59 static int dhcp_negotiations_cmp(void *ka, void *kb)
daniele 29:1a47b7151851 60 {
tass 51:ab4529a384a6 61 struct pico_dhcp_server_negotiation *a = ka, *b = kb;
tass 51:ab4529a384a6 62 if (a->xid == b->xid)
daniele 29:1a47b7151851 63 return 0;
tass 51:ab4529a384a6 64 return (a->xid < b->xid) ? -1 : 1;
daniele 29:1a47b7151851 65 }
daniele 29:1a47b7151851 66 PICO_TREE_DECLARE(DHCPNegotiations, dhcp_negotiations_cmp);
daniele 29:1a47b7151851 67
tass 51:ab4529a384a6 68 static struct pico_dhcp_server_setting *pico_dhcp_server_add_setting(struct pico_dhcp_server_setting *setting)
daniele 29:1a47b7151851 69 {
tass 51:ab4529a384a6 70 uint16_t port = PICO_DHCPD_PORT;
tass 51:ab4529a384a6 71 struct pico_dhcp_server_setting *dhcps = NULL, *found = NULL, test = {0};
tass 51:ab4529a384a6 72 struct pico_ipv4_link *link = NULL;
tass 51:ab4529a384a6 73
tass 51:ab4529a384a6 74 link = pico_ipv4_link_get(&setting->server_ip);
tass 51:ab4529a384a6 75 if (!link) {
tass 51:ab4529a384a6 76 pico_err = PICO_ERR_EINVAL;
tass 51:ab4529a384a6 77 return NULL;
tass 51:ab4529a384a6 78 }
tass 51:ab4529a384a6 79 test.dev = setting->dev;
tass 51:ab4529a384a6 80 found = pico_tree_findKey(&DHCPSettings, &test);
tass 51:ab4529a384a6 81 if (found) {
tass 51:ab4529a384a6 82 pico_err = PICO_ERR_EINVAL;
tass 51:ab4529a384a6 83 return NULL;
tass 51:ab4529a384a6 84 }
tass 51:ab4529a384a6 85 dhcps = pico_zalloc(sizeof(struct pico_dhcp_server_setting));
tass 51:ab4529a384a6 86 if (!dhcps) {
tass 51:ab4529a384a6 87 pico_err = PICO_ERR_ENOMEM;
tass 51:ab4529a384a6 88 return NULL;
tass 51:ab4529a384a6 89 }
daniele 29:1a47b7151851 90
tass 51:ab4529a384a6 91 dhcps->lease_time = setting->lease_time;
tass 51:ab4529a384a6 92 dhcps->pool_start = setting->pool_start;
tass 51:ab4529a384a6 93 dhcps->pool_next = setting->pool_next;
tass 51:ab4529a384a6 94 dhcps->pool_end = setting->pool_end;
tass 51:ab4529a384a6 95 dhcps->dev = link->dev;
tass 51:ab4529a384a6 96 dhcps->server_ip = link->address;
tass 51:ab4529a384a6 97 dhcps->netmask = link->netmask;
tass 51:ab4529a384a6 98
tass 51:ab4529a384a6 99 /* default values if not provided */
tass 51:ab4529a384a6 100 if (!dhcps->pool_start)
tass 51:ab4529a384a6 101 dhcps->pool_start = (dhcps->server_ip.addr & dhcps->netmask.addr) | DHCP_SERVER_POOL_START;
tass 51:ab4529a384a6 102 if (!dhcps->pool_end)
tass 51:ab4529a384a6 103 dhcps->pool_end = (dhcps->server_ip.addr & dhcps->netmask.addr) | DHCP_SERVER_POOL_END;
tass 51:ab4529a384a6 104 if (!dhcps->lease_time)
tass 51:ab4529a384a6 105 dhcps->lease_time = DHCP_SERVER_LEASE_TIME;
tass 51:ab4529a384a6 106 dhcps->pool_next = dhcps->pool_start;
tass 51:ab4529a384a6 107
tass 51:ab4529a384a6 108 dhcps->s = pico_socket_open(PICO_PROTO_IPV4, PICO_PROTO_UDP, &pico_dhcpd_wakeup);
tass 51:ab4529a384a6 109 if (!dhcps->s) {
tass 51:ab4529a384a6 110 dhcps_dbg("DHCP server ERROR: failure opening socket (%s)\n", strerror(pico_err));
tass 51:ab4529a384a6 111 pico_free(dhcps);
daniele 29:1a47b7151851 112 return NULL;
tass 51:ab4529a384a6 113 }
tass 51:ab4529a384a6 114 if (pico_socket_bind(dhcps->s, &dhcps->server_ip, &port) < 0) {
tass 51:ab4529a384a6 115 dhcps_dbg("DHCP server ERROR: failure binding socket (%s)\n", strerror(pico_err));
tass 51:ab4529a384a6 116 pico_free(dhcps);
tass 51:ab4529a384a6 117 return NULL;
tass 51:ab4529a384a6 118 }
tass 51:ab4529a384a6 119
tass 51:ab4529a384a6 120 pico_tree_insert(&DHCPSettings, dhcps);
tass 51:ab4529a384a6 121 return dhcps;
daniele 29:1a47b7151851 122 }
daniele 29:1a47b7151851 123
tass 51:ab4529a384a6 124 static struct pico_dhcp_server_negotiation *pico_dhcp_server_find_negotiation(uint32_t xid)
daniele 29:1a47b7151851 125 {
tass 51:ab4529a384a6 126 struct pico_dhcp_server_negotiation test = {0}, *found = NULL;
daniele 29:1a47b7151851 127
tass 51:ab4529a384a6 128 test.xid = xid;
tass 51:ab4529a384a6 129 found = pico_tree_findKey(&DHCPNegotiations, &test);
tass 51:ab4529a384a6 130 if (found)
tass 51:ab4529a384a6 131 return found;
tass 51:ab4529a384a6 132 else
tass 51:ab4529a384a6 133 return NULL;
daniele 29:1a47b7151851 134 }
daniele 29:1a47b7151851 135
tass 51:ab4529a384a6 136 static struct pico_dhcp_server_negotiation *pico_dhcp_server_add_negotiation(struct pico_device *dev, struct pico_dhcp_hdr *hdr)
daniele 29:1a47b7151851 137 {
tass 51:ab4529a384a6 138 struct pico_dhcp_server_negotiation *dhcpn = NULL;
tass 51:ab4529a384a6 139 struct pico_dhcp_server_setting test = {0};
tass 51:ab4529a384a6 140 struct pico_ip4 *ciaddr = NULL;
tass 51:ab4529a384a6 141
tass 51:ab4529a384a6 142 if (pico_dhcp_server_find_negotiation(hdr->xid))
tass 51:ab4529a384a6 143 return NULL;
tass 51:ab4529a384a6 144
tass 51:ab4529a384a6 145 dhcpn = pico_zalloc(sizeof(struct pico_dhcp_server_negotiation));
tass 51:ab4529a384a6 146 if (!dhcpn) {
tass 51:ab4529a384a6 147 pico_err = PICO_ERR_ENOMEM;
tass 51:ab4529a384a6 148 return NULL;
tass 51:ab4529a384a6 149 }
daniele 29:1a47b7151851 150
tass 51:ab4529a384a6 151 dhcpn->xid = hdr->xid;
tass 51:ab4529a384a6 152 dhcpn->state = PICO_DHCP_STATE_DISCOVER;
tass 51:ab4529a384a6 153 memcpy(dhcpn->hwaddr.addr, hdr->hwaddr, PICO_SIZE_ETH);
tass 51:ab4529a384a6 154
tass 51:ab4529a384a6 155 test.dev = dev;
tass 51:ab4529a384a6 156 dhcpn->dhcps = pico_tree_findKey(&DHCPSettings, &test);
tass 51:ab4529a384a6 157 if (!dhcpn->dhcps) {
tass 51:ab4529a384a6 158 dhcps_dbg("DHCP server WARNING: received DHCP message on unconfigured link %s\n", dev->name);
tass 51:ab4529a384a6 159 pico_free(dhcpn);
tass 51:ab4529a384a6 160 return NULL;
tass 51:ab4529a384a6 161 }
tass 51:ab4529a384a6 162
tass 51:ab4529a384a6 163 ciaddr = pico_arp_reverse_lookup(&dhcpn->hwaddr);
tass 51:ab4529a384a6 164 if (!ciaddr) {
tass 51:ab4529a384a6 165 dhcpn->ciaddr.addr = dhcpn->dhcps->pool_next;
tass 51:ab4529a384a6 166 dhcpn->dhcps->pool_next = long_be(long_be(dhcpn->dhcps->pool_next) + 1);
tass 51:ab4529a384a6 167 pico_arp_create_entry(dhcpn->hwaddr.addr, dhcpn->ciaddr, dhcpn->dhcps->dev);
tass 51:ab4529a384a6 168 } else {
tass 51:ab4529a384a6 169 dhcpn->ciaddr = *ciaddr;
daniele 29:1a47b7151851 170 }
daniele 29:1a47b7151851 171
tass 51:ab4529a384a6 172 pico_tree_insert(&DHCPNegotiations, dhcpn);
tass 51:ab4529a384a6 173 return dhcpn;
tass 51:ab4529a384a6 174 }
tass 51:ab4529a384a6 175
tass 51:ab4529a384a6 176 static void dhcpd_make_reply(struct pico_dhcp_server_negotiation *dhcpn, uint8_t msg_type)
tass 51:ab4529a384a6 177 {
tass 51:ab4529a384a6 178 int r = 0, optlen = 0, offset = 0;
tass 51:ab4529a384a6 179 struct pico_ip4 broadcast = {0}, dns = {0}, destination = { .addr = 0xFFFFFFFF};
tass 51:ab4529a384a6 180 struct pico_dhcp_hdr *hdr = NULL;
tass 51:ab4529a384a6 181
tass 51:ab4529a384a6 182 dns.addr = DHCP_SERVER_OPENDNS;
tass 51:ab4529a384a6 183 broadcast.addr = dhcpn->dhcps->server_ip.addr | ~(dhcpn->dhcps->netmask.addr);
tass 51:ab4529a384a6 184
tass 51:ab4529a384a6 185 optlen = PICO_DHCP_OPTLEN_MSGTYPE + PICO_DHCP_OPTLEN_SERVERID + PICO_DHCP_OPTLEN_LEASETIME + PICO_DHCP_OPTLEN_NETMASK + PICO_DHCP_OPTLEN_ROUTER
tass 51:ab4529a384a6 186 + PICO_DHCP_OPTLEN_BROADCAST + PICO_DHCP_OPTLEN_DNS + PICO_DHCP_OPTLEN_END;
tass 51:ab4529a384a6 187 hdr = pico_zalloc(sizeof(struct pico_dhcp_hdr) + optlen);
tass 51:ab4529a384a6 188
tass 51:ab4529a384a6 189 hdr->op = PICO_DHCP_OP_REPLY;
tass 51:ab4529a384a6 190 hdr->htype = PICO_DHCP_HTYPE_ETH;
tass 51:ab4529a384a6 191 hdr->hlen = PICO_SIZE_ETH;
tass 51:ab4529a384a6 192 hdr->xid = dhcpn->xid;
tass 51:ab4529a384a6 193 hdr->yiaddr = dhcpn->ciaddr.addr;
tass 51:ab4529a384a6 194 hdr->siaddr = dhcpn->dhcps->server_ip.addr;
tass 51:ab4529a384a6 195 hdr->dhcp_magic = PICO_DHCPD_MAGIC_COOKIE;
tass 51:ab4529a384a6 196 memcpy(hdr->hwaddr, dhcpn->hwaddr.addr, PICO_SIZE_ETH);
daniele 29:1a47b7151851 197
tass 51:ab4529a384a6 198 /* options */
tass 51:ab4529a384a6 199 offset += pico_dhcp_opt_msgtype(&hdr->options[offset], msg_type);
tass 51:ab4529a384a6 200 offset += pico_dhcp_opt_serverid(&hdr->options[offset], &dhcpn->dhcps->server_ip);
tass 51:ab4529a384a6 201 offset += pico_dhcp_opt_leasetime(&hdr->options[offset], dhcpn->dhcps->lease_time);
tass 51:ab4529a384a6 202 offset += pico_dhcp_opt_netmask(&hdr->options[offset], &dhcpn->dhcps->netmask);
tass 51:ab4529a384a6 203 offset += pico_dhcp_opt_router(&hdr->options[offset], &dhcpn->dhcps->server_ip);
tass 51:ab4529a384a6 204 offset += pico_dhcp_opt_broadcast(&hdr->options[offset], &broadcast);
tass 51:ab4529a384a6 205 offset += pico_dhcp_opt_dns(&hdr->options[offset], &dns);
tass 51:ab4529a384a6 206 offset += pico_dhcp_opt_end(&hdr->options[offset]);
tass 51:ab4529a384a6 207
tass 51:ab4529a384a6 208 destination.addr = hdr->yiaddr;
tass 51:ab4529a384a6 209 r = pico_socket_sendto(dhcpn->dhcps->s, hdr, sizeof(struct pico_dhcp_hdr) + optlen, &destination, PICO_DHCP_CLIENT_PORT);
tass 51:ab4529a384a6 210 if (r < 0)
tass 51:ab4529a384a6 211 dhcps_dbg("DHCP server WARNING: failure sending: %s!\n", strerror(pico_err));
daniele 29:1a47b7151851 212
tass 51:ab4529a384a6 213 return;
tass 51:ab4529a384a6 214 }
daniele 29:1a47b7151851 215
tass 51:ab4529a384a6 216 static void pico_dhcp_server_recv(struct pico_socket *s, uint8_t *buf, int len)
tass 51:ab4529a384a6 217 {
tass 51:ab4529a384a6 218 uint8_t msgtype = 0;
tass 51:ab4529a384a6 219 int optlen = len - sizeof(struct pico_dhcp_hdr);
tass 51:ab4529a384a6 220 struct pico_dhcp_hdr *hdr = (struct pico_dhcp_hdr *)buf;
tass 51:ab4529a384a6 221 struct pico_dhcp_opt *opt = (struct pico_dhcp_opt *)hdr->options;
tass 51:ab4529a384a6 222 struct pico_dhcp_server_negotiation *dhcpn = NULL;
tass 51:ab4529a384a6 223 struct pico_ip4 reqip = {0}, server_id = {0};
tass 51:ab4529a384a6 224 struct pico_device *dev = NULL;
tass 51:ab4529a384a6 225
tass 51:ab4529a384a6 226 if (!pico_dhcp_are_options_valid(hdr->options, optlen))
daniele 29:1a47b7151851 227 return;
daniele 29:1a47b7151851 228
tass 51:ab4529a384a6 229 dev = pico_ipv4_link_find(&s->local_addr.ip4);
tass 51:ab4529a384a6 230 dhcpn = pico_dhcp_server_find_negotiation(hdr->xid);
tass 51:ab4529a384a6 231 if (!dhcpn)
tass 51:ab4529a384a6 232 dhcpn = pico_dhcp_server_add_negotiation(dev, hdr);
tass 51:ab4529a384a6 233
tass 51:ab4529a384a6 234 if (!ip_inrange(dhcpn->ciaddr.addr))
tass 51:ab4529a384a6 235 return;
tass 51:ab4529a384a6 236
tass 51:ab4529a384a6 237 do {
tass 51:ab4529a384a6 238 switch (opt->code)
tass 51:ab4529a384a6 239 {
tass 51:ab4529a384a6 240 case PICO_DHCP_OPT_PAD:
tass 51:ab4529a384a6 241 break;
tass 51:ab4529a384a6 242
tass 51:ab4529a384a6 243 case PICO_DHCP_OPT_END:
daniele 29:1a47b7151851 244 break;
tass 51:ab4529a384a6 245
tass 51:ab4529a384a6 246 case PICO_DHCP_OPT_MSGTYPE:
tass 51:ab4529a384a6 247 msgtype = opt->ext.msg_type.type;
tass 51:ab4529a384a6 248 dhcps_dbg("DHCP server: message type %u\n", msgtype);
daniele 29:1a47b7151851 249 break;
tass 51:ab4529a384a6 250
tass 51:ab4529a384a6 251 case PICO_DHCP_OPT_REQIP:
tass 51:ab4529a384a6 252 reqip = opt->ext.req_ip.ip;
tass 51:ab4529a384a6 253 dhcps_dbg("DHCP server: requested IP %08X\n", reqip.addr);
tass 51:ab4529a384a6 254 break;
tass 51:ab4529a384a6 255
tass 51:ab4529a384a6 256 case PICO_DHCP_OPT_SERVERID:
tass 51:ab4529a384a6 257 server_id = opt->ext.server_id.ip;
tass 51:ab4529a384a6 258 dhcps_dbg("DHCP server: server ID %08X\n", server_id.addr);
daniele 29:1a47b7151851 259 break;
tass 51:ab4529a384a6 260
daniele 29:1a47b7151851 261 default:
tass 51:ab4529a384a6 262 dhcps_dbg("DHCP server WARNING: unsupported option %u\n", opt->code);
daniele 29:1a47b7151851 263 break;
daniele 29:1a47b7151851 264 }
tass 51:ab4529a384a6 265 } while (pico_dhcp_next_option(&opt));
tass 51:ab4529a384a6 266
tass 51:ab4529a384a6 267 switch (msgtype)
tass 51:ab4529a384a6 268 {
tass 51:ab4529a384a6 269 case PICO_DHCP_MSG_DISCOVER:
tass 51:ab4529a384a6 270 dhcpd_make_reply(dhcpn, PICO_DHCP_MSG_OFFER);
tass 51:ab4529a384a6 271 dhcpn->state = PICO_DHCP_STATE_OFFER;
tass 51:ab4529a384a6 272 break;
daniele 29:1a47b7151851 273
tass 51:ab4529a384a6 274 case PICO_DHCP_MSG_REQUEST:
tass 51:ab4529a384a6 275 if ((dhcpn->state == PICO_DHCP_STATE_BOUND) && (!reqip.addr) && (!server_id.addr) && (hdr->ciaddr == dhcpn->ciaddr.addr))
tass 51:ab4529a384a6 276 dhcpd_make_reply(dhcpn, PICO_DHCP_MSG_ACK);
tass 51:ab4529a384a6 277 if (dhcpn->state == PICO_DHCP_STATE_OFFER) {
tass 51:ab4529a384a6 278 dhcpn->state = PICO_DHCP_STATE_BOUND;
tass 51:ab4529a384a6 279 dhcpd_make_reply(dhcpn, PICO_DHCP_MSG_ACK);
tass 51:ab4529a384a6 280 }
tass 51:ab4529a384a6 281 break;
tass 51:ab4529a384a6 282
tass 51:ab4529a384a6 283 default:
tass 51:ab4529a384a6 284 dhcps_dbg("DHCP server WARNING: unsupported message type %u\n", msgtype);
tass 51:ab4529a384a6 285 break;
daniele 29:1a47b7151851 286 }
tass 51:ab4529a384a6 287 return;
daniele 29:1a47b7151851 288 }
daniele 29:1a47b7151851 289
daniele 29:1a47b7151851 290 static void pico_dhcpd_wakeup(uint16_t ev, struct pico_socket *s)
daniele 29:1a47b7151851 291 {
tass 51:ab4529a384a6 292 uint8_t buf[DHCP_SERVER_MAXMSGSIZE] = {0};
daniele 29:1a47b7151851 293 int r = 0;
daniele 29:1a47b7151851 294
tass 51:ab4529a384a6 295 if (ev != PICO_SOCK_EV_RD)
tass 51:ab4529a384a6 296 return;
tass 51:ab4529a384a6 297 r = pico_socket_recvfrom(s, buf, DHCP_SERVER_MAXMSGSIZE, NULL, NULL);
tass 51:ab4529a384a6 298 if (r < 0)
tass 51:ab4529a384a6 299 return;
tass 51:ab4529a384a6 300
tass 51:ab4529a384a6 301 pico_dhcp_server_recv(s, buf, r);
tass 51:ab4529a384a6 302 return;
daniele 29:1a47b7151851 303 }
daniele 29:1a47b7151851 304
tass 51:ab4529a384a6 305 int pico_dhcp_server_initiate(struct pico_dhcp_server_setting *setting)
daniele 29:1a47b7151851 306 {
tass 51:ab4529a384a6 307 if (!setting || !setting->server_ip.addr) {
daniele 29:1a47b7151851 308 pico_err = PICO_ERR_EINVAL;
daniele 29:1a47b7151851 309 return -1;
daniele 29:1a47b7151851 310 }
daniele 29:1a47b7151851 311
tass 51:ab4529a384a6 312 if (pico_dhcp_server_add_setting(setting) == NULL)
daniele 29:1a47b7151851 313 return -1;
daniele 29:1a47b7151851 314
daniele 29:1a47b7151851 315 return 0;
daniele 29:1a47b7151851 316 }
daniele 29:1a47b7151851 317 #endif /* PICO_SUPPORT_DHCP */