Ethernet for Nucleo and Disco board STM32F746 works with gcc and arm. IAC is untested
Fork of F7_Ethernet by
lwip/core/udp.c@2:e0a4035b5cd1, 2016-10-06 (annotated)
- Committer:
- rctaduio
- Date:
- Thu Oct 06 16:55:16 2016 +0000
- Revision:
- 2:e0a4035b5cd1
- Parent:
- 0:d26c1b55cfca
Ethernet library for F7
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
DieterGraef | 0:d26c1b55cfca | 1 | /** |
DieterGraef | 0:d26c1b55cfca | 2 | * @file |
DieterGraef | 0:d26c1b55cfca | 3 | * User Datagram Protocol module |
DieterGraef | 0:d26c1b55cfca | 4 | * |
DieterGraef | 0:d26c1b55cfca | 5 | */ |
DieterGraef | 0:d26c1b55cfca | 6 | |
DieterGraef | 0:d26c1b55cfca | 7 | /* |
DieterGraef | 0:d26c1b55cfca | 8 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
DieterGraef | 0:d26c1b55cfca | 9 | * All rights reserved. |
DieterGraef | 0:d26c1b55cfca | 10 | * |
DieterGraef | 0:d26c1b55cfca | 11 | * Redistribution and use in source and binary forms, with or without modification, |
DieterGraef | 0:d26c1b55cfca | 12 | * are permitted provided that the following conditions are met: |
DieterGraef | 0:d26c1b55cfca | 13 | * |
DieterGraef | 0:d26c1b55cfca | 14 | * 1. Redistributions of source code must retain the above copyright notice, |
DieterGraef | 0:d26c1b55cfca | 15 | * this list of conditions and the following disclaimer. |
DieterGraef | 0:d26c1b55cfca | 16 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
DieterGraef | 0:d26c1b55cfca | 17 | * this list of conditions and the following disclaimer in the documentation |
DieterGraef | 0:d26c1b55cfca | 18 | * and/or other materials provided with the distribution. |
DieterGraef | 0:d26c1b55cfca | 19 | * 3. The name of the author may not be used to endorse or promote products |
DieterGraef | 0:d26c1b55cfca | 20 | * derived from this software without specific prior written permission. |
DieterGraef | 0:d26c1b55cfca | 21 | * |
DieterGraef | 0:d26c1b55cfca | 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
DieterGraef | 0:d26c1b55cfca | 23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
DieterGraef | 0:d26c1b55cfca | 24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
DieterGraef | 0:d26c1b55cfca | 25 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
DieterGraef | 0:d26c1b55cfca | 26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
DieterGraef | 0:d26c1b55cfca | 27 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
DieterGraef | 0:d26c1b55cfca | 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
DieterGraef | 0:d26c1b55cfca | 29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
DieterGraef | 0:d26c1b55cfca | 30 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
DieterGraef | 0:d26c1b55cfca | 31 | * OF SUCH DAMAGE. |
DieterGraef | 0:d26c1b55cfca | 32 | * |
DieterGraef | 0:d26c1b55cfca | 33 | * This file is part of the lwIP TCP/IP stack. |
DieterGraef | 0:d26c1b55cfca | 34 | * |
DieterGraef | 0:d26c1b55cfca | 35 | * Author: Adam Dunkels <adam@sics.se> |
DieterGraef | 0:d26c1b55cfca | 36 | * |
DieterGraef | 0:d26c1b55cfca | 37 | */ |
DieterGraef | 0:d26c1b55cfca | 38 | |
DieterGraef | 0:d26c1b55cfca | 39 | |
DieterGraef | 0:d26c1b55cfca | 40 | /* udp.c |
DieterGraef | 0:d26c1b55cfca | 41 | * |
DieterGraef | 0:d26c1b55cfca | 42 | * The code for the User Datagram Protocol UDP & UDPLite (RFC 3828). |
DieterGraef | 0:d26c1b55cfca | 43 | * |
DieterGraef | 0:d26c1b55cfca | 44 | */ |
DieterGraef | 0:d26c1b55cfca | 45 | |
DieterGraef | 0:d26c1b55cfca | 46 | /* @todo Check the use of '(struct udp_pcb).chksum_len_rx'! |
DieterGraef | 0:d26c1b55cfca | 47 | */ |
DieterGraef | 0:d26c1b55cfca | 48 | |
DieterGraef | 0:d26c1b55cfca | 49 | #include "lwip/opt.h" |
DieterGraef | 0:d26c1b55cfca | 50 | |
DieterGraef | 0:d26c1b55cfca | 51 | #if LWIP_UDP /* don't build if not configured for use in lwipopts.h */ |
DieterGraef | 0:d26c1b55cfca | 52 | |
DieterGraef | 0:d26c1b55cfca | 53 | #include "lwip/udp.h" |
DieterGraef | 0:d26c1b55cfca | 54 | #include "lwip/def.h" |
DieterGraef | 0:d26c1b55cfca | 55 | #include "lwip/memp.h" |
DieterGraef | 0:d26c1b55cfca | 56 | #include "lwip/inet_chksum.h" |
DieterGraef | 0:d26c1b55cfca | 57 | #include "lwip/ip_addr.h" |
DieterGraef | 0:d26c1b55cfca | 58 | #include "lwip/netif.h" |
DieterGraef | 0:d26c1b55cfca | 59 | #include "lwip/icmp.h" |
DieterGraef | 0:d26c1b55cfca | 60 | #include "lwip/stats.h" |
DieterGraef | 0:d26c1b55cfca | 61 | #include "lwip/snmp.h" |
DieterGraef | 0:d26c1b55cfca | 62 | #include "arch/perf.h" |
DieterGraef | 0:d26c1b55cfca | 63 | #include "lwip/dhcp.h" |
DieterGraef | 0:d26c1b55cfca | 64 | |
DieterGraef | 0:d26c1b55cfca | 65 | #include <string.h> |
DieterGraef | 0:d26c1b55cfca | 66 | |
DieterGraef | 0:d26c1b55cfca | 67 | #ifndef UDP_LOCAL_PORT_RANGE_START |
DieterGraef | 0:d26c1b55cfca | 68 | /* From http://www.iana.org/assignments/port-numbers: |
DieterGraef | 0:d26c1b55cfca | 69 | "The Dynamic and/or Private Ports are those from 49152 through 65535" */ |
DieterGraef | 0:d26c1b55cfca | 70 | #define UDP_LOCAL_PORT_RANGE_START 0xc000 |
DieterGraef | 0:d26c1b55cfca | 71 | #define UDP_LOCAL_PORT_RANGE_END 0xffff |
DieterGraef | 0:d26c1b55cfca | 72 | #define UDP_ENSURE_LOCAL_PORT_RANGE(port) (((port) & ~UDP_LOCAL_PORT_RANGE_START) + UDP_LOCAL_PORT_RANGE_START) |
DieterGraef | 0:d26c1b55cfca | 73 | #endif |
DieterGraef | 0:d26c1b55cfca | 74 | |
DieterGraef | 0:d26c1b55cfca | 75 | /* last local UDP port */ |
DieterGraef | 0:d26c1b55cfca | 76 | static u16_t udp_port = UDP_LOCAL_PORT_RANGE_START; |
DieterGraef | 0:d26c1b55cfca | 77 | |
DieterGraef | 0:d26c1b55cfca | 78 | /* The list of UDP PCBs */ |
DieterGraef | 0:d26c1b55cfca | 79 | /* exported in udp.h (was static) */ |
DieterGraef | 0:d26c1b55cfca | 80 | struct udp_pcb *udp_pcbs; |
DieterGraef | 0:d26c1b55cfca | 81 | |
DieterGraef | 0:d26c1b55cfca | 82 | /** |
DieterGraef | 0:d26c1b55cfca | 83 | * Initialize this module. |
DieterGraef | 0:d26c1b55cfca | 84 | */ |
DieterGraef | 0:d26c1b55cfca | 85 | void |
DieterGraef | 0:d26c1b55cfca | 86 | udp_init(void) |
DieterGraef | 0:d26c1b55cfca | 87 | { |
DieterGraef | 0:d26c1b55cfca | 88 | #if LWIP_RANDOMIZE_INITIAL_LOCAL_PORTS && defined(LWIP_RAND) |
DieterGraef | 0:d26c1b55cfca | 89 | udp_port = UDP_ENSURE_LOCAL_PORT_RANGE(LWIP_RAND()); |
DieterGraef | 0:d26c1b55cfca | 90 | #endif /* LWIP_RANDOMIZE_INITIAL_LOCAL_PORTS && defined(LWIP_RAND) */ |
DieterGraef | 0:d26c1b55cfca | 91 | } |
DieterGraef | 0:d26c1b55cfca | 92 | |
DieterGraef | 0:d26c1b55cfca | 93 | /** |
DieterGraef | 0:d26c1b55cfca | 94 | * Allocate a new local UDP port. |
DieterGraef | 0:d26c1b55cfca | 95 | * |
DieterGraef | 0:d26c1b55cfca | 96 | * @return a new (free) local UDP port number |
DieterGraef | 0:d26c1b55cfca | 97 | */ |
DieterGraef | 0:d26c1b55cfca | 98 | static u16_t |
DieterGraef | 0:d26c1b55cfca | 99 | udp_new_port(void) |
DieterGraef | 0:d26c1b55cfca | 100 | { |
DieterGraef | 0:d26c1b55cfca | 101 | u16_t n = 0; |
DieterGraef | 0:d26c1b55cfca | 102 | struct udp_pcb *pcb; |
DieterGraef | 0:d26c1b55cfca | 103 | |
DieterGraef | 0:d26c1b55cfca | 104 | again: |
DieterGraef | 0:d26c1b55cfca | 105 | if (udp_port++ == UDP_LOCAL_PORT_RANGE_END) { |
DieterGraef | 0:d26c1b55cfca | 106 | udp_port = UDP_LOCAL_PORT_RANGE_START; |
DieterGraef | 0:d26c1b55cfca | 107 | } |
DieterGraef | 0:d26c1b55cfca | 108 | /* Check all PCBs. */ |
DieterGraef | 0:d26c1b55cfca | 109 | for(pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) { |
DieterGraef | 0:d26c1b55cfca | 110 | if (pcb->local_port == udp_port) { |
DieterGraef | 0:d26c1b55cfca | 111 | if (++n > (UDP_LOCAL_PORT_RANGE_END - UDP_LOCAL_PORT_RANGE_START)) { |
DieterGraef | 0:d26c1b55cfca | 112 | return 0; |
DieterGraef | 0:d26c1b55cfca | 113 | } |
DieterGraef | 0:d26c1b55cfca | 114 | goto again; |
DieterGraef | 0:d26c1b55cfca | 115 | } |
DieterGraef | 0:d26c1b55cfca | 116 | } |
DieterGraef | 0:d26c1b55cfca | 117 | return udp_port; |
DieterGraef | 0:d26c1b55cfca | 118 | #if 0 |
DieterGraef | 0:d26c1b55cfca | 119 | struct udp_pcb *ipcb = udp_pcbs; |
DieterGraef | 0:d26c1b55cfca | 120 | while ((ipcb != NULL) && (udp_port != UDP_LOCAL_PORT_RANGE_END)) { |
DieterGraef | 0:d26c1b55cfca | 121 | if (ipcb->local_port == udp_port) { |
DieterGraef | 0:d26c1b55cfca | 122 | /* port is already used by another udp_pcb */ |
DieterGraef | 0:d26c1b55cfca | 123 | udp_port++; |
DieterGraef | 0:d26c1b55cfca | 124 | /* restart scanning all udp pcbs */ |
DieterGraef | 0:d26c1b55cfca | 125 | ipcb = udp_pcbs; |
DieterGraef | 0:d26c1b55cfca | 126 | } else { |
DieterGraef | 0:d26c1b55cfca | 127 | /* go on with next udp pcb */ |
DieterGraef | 0:d26c1b55cfca | 128 | ipcb = ipcb->next; |
DieterGraef | 0:d26c1b55cfca | 129 | } |
DieterGraef | 0:d26c1b55cfca | 130 | } |
DieterGraef | 0:d26c1b55cfca | 131 | if (ipcb != NULL) { |
DieterGraef | 0:d26c1b55cfca | 132 | return 0; |
DieterGraef | 0:d26c1b55cfca | 133 | } |
DieterGraef | 0:d26c1b55cfca | 134 | return udp_port; |
DieterGraef | 0:d26c1b55cfca | 135 | #endif |
DieterGraef | 0:d26c1b55cfca | 136 | } |
DieterGraef | 0:d26c1b55cfca | 137 | |
DieterGraef | 0:d26c1b55cfca | 138 | /** |
DieterGraef | 0:d26c1b55cfca | 139 | * Process an incoming UDP datagram. |
DieterGraef | 0:d26c1b55cfca | 140 | * |
DieterGraef | 0:d26c1b55cfca | 141 | * Given an incoming UDP datagram (as a chain of pbufs) this function |
DieterGraef | 0:d26c1b55cfca | 142 | * finds a corresponding UDP PCB and hands over the pbuf to the pcbs |
DieterGraef | 0:d26c1b55cfca | 143 | * recv function. If no pcb is found or the datagram is incorrect, the |
DieterGraef | 0:d26c1b55cfca | 144 | * pbuf is freed. |
DieterGraef | 0:d26c1b55cfca | 145 | * |
DieterGraef | 0:d26c1b55cfca | 146 | * @param p pbuf to be demultiplexed to a UDP PCB. |
DieterGraef | 0:d26c1b55cfca | 147 | * @param inp network interface on which the datagram was received. |
DieterGraef | 0:d26c1b55cfca | 148 | * |
DieterGraef | 0:d26c1b55cfca | 149 | */ |
DieterGraef | 0:d26c1b55cfca | 150 | void |
DieterGraef | 0:d26c1b55cfca | 151 | udp_input(struct pbuf *p, struct netif *inp) |
DieterGraef | 0:d26c1b55cfca | 152 | { |
DieterGraef | 0:d26c1b55cfca | 153 | struct udp_hdr *udphdr; |
DieterGraef | 0:d26c1b55cfca | 154 | struct udp_pcb *pcb, *prev; |
DieterGraef | 0:d26c1b55cfca | 155 | struct udp_pcb *uncon_pcb; |
DieterGraef | 0:d26c1b55cfca | 156 | struct ip_hdr *iphdr; |
DieterGraef | 0:d26c1b55cfca | 157 | u16_t src, dest; |
DieterGraef | 0:d26c1b55cfca | 158 | u8_t local_match; |
DieterGraef | 0:d26c1b55cfca | 159 | u8_t broadcast; |
DieterGraef | 0:d26c1b55cfca | 160 | |
DieterGraef | 0:d26c1b55cfca | 161 | PERF_START; |
DieterGraef | 0:d26c1b55cfca | 162 | |
DieterGraef | 0:d26c1b55cfca | 163 | UDP_STATS_INC(udp.recv); |
DieterGraef | 0:d26c1b55cfca | 164 | |
DieterGraef | 0:d26c1b55cfca | 165 | iphdr = (struct ip_hdr *)p->payload; |
DieterGraef | 0:d26c1b55cfca | 166 | |
DieterGraef | 0:d26c1b55cfca | 167 | /* Check minimum length (IP header + UDP header) |
DieterGraef | 0:d26c1b55cfca | 168 | * and move payload pointer to UDP header */ |
DieterGraef | 0:d26c1b55cfca | 169 | if (p->tot_len < (IPH_HL(iphdr) * 4 + UDP_HLEN) || pbuf_header(p, -(s16_t)(IPH_HL(iphdr) * 4))) { |
DieterGraef | 0:d26c1b55cfca | 170 | /* drop short packets */ |
DieterGraef | 0:d26c1b55cfca | 171 | LWIP_DEBUGF(UDP_DEBUG, |
DieterGraef | 0:d26c1b55cfca | 172 | ("udp_input: short UDP datagram (%"U16_F" bytes) discarded\n", p->tot_len)); |
DieterGraef | 0:d26c1b55cfca | 173 | UDP_STATS_INC(udp.lenerr); |
DieterGraef | 0:d26c1b55cfca | 174 | UDP_STATS_INC(udp.drop); |
DieterGraef | 0:d26c1b55cfca | 175 | snmp_inc_udpinerrors(); |
DieterGraef | 0:d26c1b55cfca | 176 | pbuf_free(p); |
DieterGraef | 0:d26c1b55cfca | 177 | goto end; |
DieterGraef | 0:d26c1b55cfca | 178 | } |
DieterGraef | 0:d26c1b55cfca | 179 | |
DieterGraef | 0:d26c1b55cfca | 180 | udphdr = (struct udp_hdr *)p->payload; |
DieterGraef | 0:d26c1b55cfca | 181 | |
DieterGraef | 0:d26c1b55cfca | 182 | /* is broadcast packet ? */ |
DieterGraef | 0:d26c1b55cfca | 183 | broadcast = ip_addr_isbroadcast(¤t_iphdr_dest, inp); |
DieterGraef | 0:d26c1b55cfca | 184 | |
DieterGraef | 0:d26c1b55cfca | 185 | LWIP_DEBUGF(UDP_DEBUG, ("udp_input: received datagram of length %"U16_F"\n", p->tot_len)); |
DieterGraef | 0:d26c1b55cfca | 186 | |
DieterGraef | 0:d26c1b55cfca | 187 | /* convert src and dest ports to host byte order */ |
DieterGraef | 0:d26c1b55cfca | 188 | src = ntohs(udphdr->src); |
DieterGraef | 0:d26c1b55cfca | 189 | dest = ntohs(udphdr->dest); |
DieterGraef | 0:d26c1b55cfca | 190 | |
DieterGraef | 0:d26c1b55cfca | 191 | udp_debug_print(udphdr); |
DieterGraef | 0:d26c1b55cfca | 192 | |
DieterGraef | 0:d26c1b55cfca | 193 | /* print the UDP source and destination */ |
DieterGraef | 0:d26c1b55cfca | 194 | LWIP_DEBUGF(UDP_DEBUG, |
DieterGraef | 0:d26c1b55cfca | 195 | ("udp (%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F") <-- " |
DieterGraef | 0:d26c1b55cfca | 196 | "(%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F")\n", |
DieterGraef | 0:d26c1b55cfca | 197 | ip4_addr1_16(&iphdr->dest), ip4_addr2_16(&iphdr->dest), |
DieterGraef | 0:d26c1b55cfca | 198 | ip4_addr3_16(&iphdr->dest), ip4_addr4_16(&iphdr->dest), ntohs(udphdr->dest), |
DieterGraef | 0:d26c1b55cfca | 199 | ip4_addr1_16(&iphdr->src), ip4_addr2_16(&iphdr->src), |
DieterGraef | 0:d26c1b55cfca | 200 | ip4_addr3_16(&iphdr->src), ip4_addr4_16(&iphdr->src), ntohs(udphdr->src))); |
DieterGraef | 0:d26c1b55cfca | 201 | |
DieterGraef | 0:d26c1b55cfca | 202 | #if LWIP_DHCP |
DieterGraef | 0:d26c1b55cfca | 203 | pcb = NULL; |
DieterGraef | 0:d26c1b55cfca | 204 | /* when LWIP_DHCP is active, packets to DHCP_CLIENT_PORT may only be processed by |
DieterGraef | 0:d26c1b55cfca | 205 | the dhcp module, no other UDP pcb may use the local UDP port DHCP_CLIENT_PORT */ |
DieterGraef | 0:d26c1b55cfca | 206 | if (dest == DHCP_CLIENT_PORT) { |
DieterGraef | 0:d26c1b55cfca | 207 | /* all packets for DHCP_CLIENT_PORT not coming from DHCP_SERVER_PORT are dropped! */ |
DieterGraef | 0:d26c1b55cfca | 208 | if (src == DHCP_SERVER_PORT) { |
DieterGraef | 0:d26c1b55cfca | 209 | if ((inp->dhcp != NULL) && (inp->dhcp->pcb != NULL)) { |
DieterGraef | 0:d26c1b55cfca | 210 | /* accept the packe if |
DieterGraef | 0:d26c1b55cfca | 211 | (- broadcast or directed to us) -> DHCP is link-layer-addressed, local ip is always ANY! |
DieterGraef | 0:d26c1b55cfca | 212 | - inp->dhcp->pcb->remote == ANY or iphdr->src */ |
DieterGraef | 0:d26c1b55cfca | 213 | if ((ip_addr_isany(&inp->dhcp->pcb->remote_ip) || |
DieterGraef | 0:d26c1b55cfca | 214 | ip_addr_cmp(&(inp->dhcp->pcb->remote_ip), ¤t_iphdr_src))) { |
DieterGraef | 0:d26c1b55cfca | 215 | pcb = inp->dhcp->pcb; |
DieterGraef | 0:d26c1b55cfca | 216 | } |
DieterGraef | 0:d26c1b55cfca | 217 | } |
DieterGraef | 0:d26c1b55cfca | 218 | } |
DieterGraef | 0:d26c1b55cfca | 219 | } else |
DieterGraef | 0:d26c1b55cfca | 220 | #endif /* LWIP_DHCP */ |
DieterGraef | 0:d26c1b55cfca | 221 | { |
DieterGraef | 0:d26c1b55cfca | 222 | prev = NULL; |
DieterGraef | 0:d26c1b55cfca | 223 | local_match = 0; |
DieterGraef | 0:d26c1b55cfca | 224 | uncon_pcb = NULL; |
DieterGraef | 0:d26c1b55cfca | 225 | /* Iterate through the UDP pcb list for a matching pcb. |
DieterGraef | 0:d26c1b55cfca | 226 | * 'Perfect match' pcbs (connected to the remote port & ip address) are |
DieterGraef | 0:d26c1b55cfca | 227 | * preferred. If no perfect match is found, the first unconnected pcb that |
DieterGraef | 0:d26c1b55cfca | 228 | * matches the local port and ip address gets the datagram. */ |
DieterGraef | 0:d26c1b55cfca | 229 | for (pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) { |
DieterGraef | 0:d26c1b55cfca | 230 | local_match = 0; |
DieterGraef | 0:d26c1b55cfca | 231 | /* print the PCB local and remote address */ |
DieterGraef | 0:d26c1b55cfca | 232 | LWIP_DEBUGF(UDP_DEBUG, |
DieterGraef | 0:d26c1b55cfca | 233 | ("pcb (%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F") --- " |
DieterGraef | 0:d26c1b55cfca | 234 | "(%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F")\n", |
DieterGraef | 0:d26c1b55cfca | 235 | ip4_addr1_16(&pcb->local_ip), ip4_addr2_16(&pcb->local_ip), |
DieterGraef | 0:d26c1b55cfca | 236 | ip4_addr3_16(&pcb->local_ip), ip4_addr4_16(&pcb->local_ip), pcb->local_port, |
DieterGraef | 0:d26c1b55cfca | 237 | ip4_addr1_16(&pcb->remote_ip), ip4_addr2_16(&pcb->remote_ip), |
DieterGraef | 0:d26c1b55cfca | 238 | ip4_addr3_16(&pcb->remote_ip), ip4_addr4_16(&pcb->remote_ip), pcb->remote_port)); |
DieterGraef | 0:d26c1b55cfca | 239 | |
DieterGraef | 0:d26c1b55cfca | 240 | /* compare PCB local addr+port to UDP destination addr+port */ |
DieterGraef | 0:d26c1b55cfca | 241 | if (pcb->local_port == dest) { |
DieterGraef | 0:d26c1b55cfca | 242 | if ( |
DieterGraef | 0:d26c1b55cfca | 243 | (!broadcast && ip_addr_isany(&pcb->local_ip)) || |
DieterGraef | 0:d26c1b55cfca | 244 | ip_addr_cmp(&(pcb->local_ip), ¤t_iphdr_dest) || |
DieterGraef | 0:d26c1b55cfca | 245 | #if LWIP_IGMP |
DieterGraef | 0:d26c1b55cfca | 246 | ip_addr_ismulticast(¤t_iphdr_dest) || |
DieterGraef | 0:d26c1b55cfca | 247 | #endif /* LWIP_IGMP */ |
DieterGraef | 0:d26c1b55cfca | 248 | #if IP_SOF_BROADCAST_RECV |
DieterGraef | 0:d26c1b55cfca | 249 | (broadcast && ip_get_option(pcb, SOF_BROADCAST) && |
DieterGraef | 0:d26c1b55cfca | 250 | (ip_addr_isany(&pcb->local_ip) || |
DieterGraef | 0:d26c1b55cfca | 251 | ip_addr_netcmp(&pcb->local_ip, ip_current_dest_addr(), &inp->netmask)))) { |
DieterGraef | 0:d26c1b55cfca | 252 | #else /* IP_SOF_BROADCAST_RECV */ |
DieterGraef | 0:d26c1b55cfca | 253 | (broadcast && |
DieterGraef | 0:d26c1b55cfca | 254 | (ip_addr_isany(&pcb->local_ip) || |
DieterGraef | 0:d26c1b55cfca | 255 | ip_addr_netcmp(&pcb->local_ip, ip_current_dest_addr(), &inp->netmask)))) { |
DieterGraef | 0:d26c1b55cfca | 256 | #endif /* IP_SOF_BROADCAST_RECV */ |
DieterGraef | 0:d26c1b55cfca | 257 | local_match = 1; |
DieterGraef | 0:d26c1b55cfca | 258 | if ((uncon_pcb == NULL) && |
DieterGraef | 0:d26c1b55cfca | 259 | ((pcb->flags & UDP_FLAGS_CONNECTED) == 0)) { |
DieterGraef | 0:d26c1b55cfca | 260 | /* the first unconnected matching PCB */ |
DieterGraef | 0:d26c1b55cfca | 261 | uncon_pcb = pcb; |
DieterGraef | 0:d26c1b55cfca | 262 | } |
DieterGraef | 0:d26c1b55cfca | 263 | } |
DieterGraef | 0:d26c1b55cfca | 264 | } |
DieterGraef | 0:d26c1b55cfca | 265 | /* compare PCB remote addr+port to UDP source addr+port */ |
DieterGraef | 0:d26c1b55cfca | 266 | if ((local_match != 0) && |
DieterGraef | 0:d26c1b55cfca | 267 | (pcb->remote_port == src) && |
DieterGraef | 0:d26c1b55cfca | 268 | (ip_addr_isany(&pcb->remote_ip) || |
DieterGraef | 0:d26c1b55cfca | 269 | ip_addr_cmp(&(pcb->remote_ip), ¤t_iphdr_src))) { |
DieterGraef | 0:d26c1b55cfca | 270 | /* the first fully matching PCB */ |
DieterGraef | 0:d26c1b55cfca | 271 | if (prev != NULL) { |
DieterGraef | 0:d26c1b55cfca | 272 | /* move the pcb to the front of udp_pcbs so that is |
DieterGraef | 0:d26c1b55cfca | 273 | found faster next time */ |
DieterGraef | 0:d26c1b55cfca | 274 | prev->next = pcb->next; |
DieterGraef | 0:d26c1b55cfca | 275 | pcb->next = udp_pcbs; |
DieterGraef | 0:d26c1b55cfca | 276 | udp_pcbs = pcb; |
DieterGraef | 0:d26c1b55cfca | 277 | } else { |
DieterGraef | 0:d26c1b55cfca | 278 | UDP_STATS_INC(udp.cachehit); |
DieterGraef | 0:d26c1b55cfca | 279 | } |
DieterGraef | 0:d26c1b55cfca | 280 | break; |
DieterGraef | 0:d26c1b55cfca | 281 | } |
DieterGraef | 0:d26c1b55cfca | 282 | prev = pcb; |
DieterGraef | 0:d26c1b55cfca | 283 | } |
DieterGraef | 0:d26c1b55cfca | 284 | /* no fully matching pcb found? then look for an unconnected pcb */ |
DieterGraef | 0:d26c1b55cfca | 285 | if (pcb == NULL) { |
DieterGraef | 0:d26c1b55cfca | 286 | pcb = uncon_pcb; |
DieterGraef | 0:d26c1b55cfca | 287 | } |
DieterGraef | 0:d26c1b55cfca | 288 | } |
DieterGraef | 0:d26c1b55cfca | 289 | |
DieterGraef | 0:d26c1b55cfca | 290 | /* Check checksum if this is a match or if it was directed at us. */ |
DieterGraef | 0:d26c1b55cfca | 291 | if (pcb != NULL || ip_addr_cmp(&inp->ip_addr, ¤t_iphdr_dest)) { |
DieterGraef | 0:d26c1b55cfca | 292 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_input: calculating checksum\n")); |
DieterGraef | 0:d26c1b55cfca | 293 | #if LWIP_UDPLITE |
DieterGraef | 0:d26c1b55cfca | 294 | if (IPH_PROTO(iphdr) == IP_PROTO_UDPLITE) { |
DieterGraef | 0:d26c1b55cfca | 295 | /* Do the UDP Lite checksum */ |
DieterGraef | 0:d26c1b55cfca | 296 | #if CHECKSUM_CHECK_UDP |
DieterGraef | 0:d26c1b55cfca | 297 | u16_t chklen = ntohs(udphdr->len); |
DieterGraef | 0:d26c1b55cfca | 298 | if (chklen < sizeof(struct udp_hdr)) { |
DieterGraef | 0:d26c1b55cfca | 299 | if (chklen == 0) { |
DieterGraef | 0:d26c1b55cfca | 300 | /* For UDP-Lite, checksum length of 0 means checksum |
DieterGraef | 0:d26c1b55cfca | 301 | over the complete packet (See RFC 3828 chap. 3.1) */ |
DieterGraef | 0:d26c1b55cfca | 302 | chklen = p->tot_len; |
DieterGraef | 0:d26c1b55cfca | 303 | } else { |
DieterGraef | 0:d26c1b55cfca | 304 | /* At least the UDP-Lite header must be covered by the |
DieterGraef | 0:d26c1b55cfca | 305 | checksum! (Again, see RFC 3828 chap. 3.1) */ |
DieterGraef | 0:d26c1b55cfca | 306 | UDP_STATS_INC(udp.chkerr); |
DieterGraef | 0:d26c1b55cfca | 307 | UDP_STATS_INC(udp.drop); |
DieterGraef | 0:d26c1b55cfca | 308 | snmp_inc_udpinerrors(); |
DieterGraef | 0:d26c1b55cfca | 309 | pbuf_free(p); |
DieterGraef | 0:d26c1b55cfca | 310 | goto end; |
DieterGraef | 0:d26c1b55cfca | 311 | } |
DieterGraef | 0:d26c1b55cfca | 312 | } |
DieterGraef | 0:d26c1b55cfca | 313 | if (inet_chksum_pseudo_partial(p, ¤t_iphdr_src, ¤t_iphdr_dest, |
DieterGraef | 0:d26c1b55cfca | 314 | IP_PROTO_UDPLITE, p->tot_len, chklen) != 0) { |
DieterGraef | 0:d26c1b55cfca | 315 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, |
DieterGraef | 0:d26c1b55cfca | 316 | ("udp_input: UDP Lite datagram discarded due to failing checksum\n")); |
DieterGraef | 0:d26c1b55cfca | 317 | UDP_STATS_INC(udp.chkerr); |
DieterGraef | 0:d26c1b55cfca | 318 | UDP_STATS_INC(udp.drop); |
DieterGraef | 0:d26c1b55cfca | 319 | snmp_inc_udpinerrors(); |
DieterGraef | 0:d26c1b55cfca | 320 | pbuf_free(p); |
DieterGraef | 0:d26c1b55cfca | 321 | goto end; |
DieterGraef | 0:d26c1b55cfca | 322 | } |
DieterGraef | 0:d26c1b55cfca | 323 | #endif /* CHECKSUM_CHECK_UDP */ |
DieterGraef | 0:d26c1b55cfca | 324 | } else |
DieterGraef | 0:d26c1b55cfca | 325 | #endif /* LWIP_UDPLITE */ |
DieterGraef | 0:d26c1b55cfca | 326 | { |
DieterGraef | 0:d26c1b55cfca | 327 | #if CHECKSUM_CHECK_UDP |
DieterGraef | 0:d26c1b55cfca | 328 | if (udphdr->chksum != 0) { |
DieterGraef | 0:d26c1b55cfca | 329 | if (inet_chksum_pseudo(p, ip_current_src_addr(), ip_current_dest_addr(), |
DieterGraef | 0:d26c1b55cfca | 330 | IP_PROTO_UDP, p->tot_len) != 0) { |
DieterGraef | 0:d26c1b55cfca | 331 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, |
DieterGraef | 0:d26c1b55cfca | 332 | ("udp_input: UDP datagram discarded due to failing checksum\n")); |
DieterGraef | 0:d26c1b55cfca | 333 | UDP_STATS_INC(udp.chkerr); |
DieterGraef | 0:d26c1b55cfca | 334 | UDP_STATS_INC(udp.drop); |
DieterGraef | 0:d26c1b55cfca | 335 | snmp_inc_udpinerrors(); |
DieterGraef | 0:d26c1b55cfca | 336 | pbuf_free(p); |
DieterGraef | 0:d26c1b55cfca | 337 | goto end; |
DieterGraef | 0:d26c1b55cfca | 338 | } |
DieterGraef | 0:d26c1b55cfca | 339 | } |
DieterGraef | 0:d26c1b55cfca | 340 | #endif /* CHECKSUM_CHECK_UDP */ |
DieterGraef | 0:d26c1b55cfca | 341 | } |
DieterGraef | 0:d26c1b55cfca | 342 | if(pbuf_header(p, -UDP_HLEN)) { |
DieterGraef | 0:d26c1b55cfca | 343 | /* Can we cope with this failing? Just assert for now */ |
DieterGraef | 0:d26c1b55cfca | 344 | LWIP_ASSERT("pbuf_header failed\n", 0); |
DieterGraef | 0:d26c1b55cfca | 345 | UDP_STATS_INC(udp.drop); |
DieterGraef | 0:d26c1b55cfca | 346 | snmp_inc_udpinerrors(); |
DieterGraef | 0:d26c1b55cfca | 347 | pbuf_free(p); |
DieterGraef | 0:d26c1b55cfca | 348 | goto end; |
DieterGraef | 0:d26c1b55cfca | 349 | } |
DieterGraef | 0:d26c1b55cfca | 350 | if (pcb != NULL) { |
DieterGraef | 0:d26c1b55cfca | 351 | snmp_inc_udpindatagrams(); |
DieterGraef | 0:d26c1b55cfca | 352 | #if SO_REUSE && SO_REUSE_RXTOALL |
DieterGraef | 0:d26c1b55cfca | 353 | if ((broadcast || ip_addr_ismulticast(¤t_iphdr_dest)) && |
DieterGraef | 0:d26c1b55cfca | 354 | ip_get_option(pcb, SOF_REUSEADDR)) { |
DieterGraef | 0:d26c1b55cfca | 355 | /* pass broadcast- or multicast packets to all multicast pcbs |
DieterGraef | 0:d26c1b55cfca | 356 | if SOF_REUSEADDR is set on the first match */ |
DieterGraef | 0:d26c1b55cfca | 357 | struct udp_pcb *mpcb; |
DieterGraef | 0:d26c1b55cfca | 358 | u8_t p_header_changed = 0; |
DieterGraef | 0:d26c1b55cfca | 359 | for (mpcb = udp_pcbs; mpcb != NULL; mpcb = mpcb->next) { |
DieterGraef | 0:d26c1b55cfca | 360 | if (mpcb != pcb) { |
DieterGraef | 0:d26c1b55cfca | 361 | /* compare PCB local addr+port to UDP destination addr+port */ |
DieterGraef | 0:d26c1b55cfca | 362 | if ((mpcb->local_port == dest) && |
DieterGraef | 0:d26c1b55cfca | 363 | ((!broadcast && ip_addr_isany(&mpcb->local_ip)) || |
DieterGraef | 0:d26c1b55cfca | 364 | ip_addr_cmp(&(mpcb->local_ip), ¤t_iphdr_dest) || |
DieterGraef | 0:d26c1b55cfca | 365 | #if LWIP_IGMP |
DieterGraef | 0:d26c1b55cfca | 366 | ip_addr_ismulticast(¤t_iphdr_dest) || |
DieterGraef | 0:d26c1b55cfca | 367 | #endif /* LWIP_IGMP */ |
DieterGraef | 0:d26c1b55cfca | 368 | #if IP_SOF_BROADCAST_RECV |
DieterGraef | 0:d26c1b55cfca | 369 | (broadcast && ip_get_option(mpcb, SOF_BROADCAST)))) { |
DieterGraef | 0:d26c1b55cfca | 370 | #else /* IP_SOF_BROADCAST_RECV */ |
DieterGraef | 0:d26c1b55cfca | 371 | (broadcast))) { |
DieterGraef | 0:d26c1b55cfca | 372 | #endif /* IP_SOF_BROADCAST_RECV */ |
DieterGraef | 0:d26c1b55cfca | 373 | /* pass a copy of the packet to all local matches */ |
DieterGraef | 0:d26c1b55cfca | 374 | if (mpcb->recv != NULL) { |
DieterGraef | 0:d26c1b55cfca | 375 | struct pbuf *q; |
DieterGraef | 0:d26c1b55cfca | 376 | /* for that, move payload to IP header again */ |
DieterGraef | 0:d26c1b55cfca | 377 | if (p_header_changed == 0) { |
DieterGraef | 0:d26c1b55cfca | 378 | pbuf_header(p, (s16_t)((IPH_HL(iphdr) * 4) + UDP_HLEN)); |
DieterGraef | 0:d26c1b55cfca | 379 | p_header_changed = 1; |
DieterGraef | 0:d26c1b55cfca | 380 | } |
DieterGraef | 0:d26c1b55cfca | 381 | q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM); |
DieterGraef | 0:d26c1b55cfca | 382 | if (q != NULL) { |
DieterGraef | 0:d26c1b55cfca | 383 | err_t err = pbuf_copy(q, p); |
DieterGraef | 0:d26c1b55cfca | 384 | if (err == ERR_OK) { |
DieterGraef | 0:d26c1b55cfca | 385 | /* move payload to UDP data */ |
DieterGraef | 0:d26c1b55cfca | 386 | pbuf_header(q, -(s16_t)((IPH_HL(iphdr) * 4) + UDP_HLEN)); |
DieterGraef | 0:d26c1b55cfca | 387 | mpcb->recv(mpcb->recv_arg, mpcb, q, ip_current_src_addr(), src); |
DieterGraef | 0:d26c1b55cfca | 388 | } |
DieterGraef | 0:d26c1b55cfca | 389 | } |
DieterGraef | 0:d26c1b55cfca | 390 | } |
DieterGraef | 0:d26c1b55cfca | 391 | } |
DieterGraef | 0:d26c1b55cfca | 392 | } |
DieterGraef | 0:d26c1b55cfca | 393 | } |
DieterGraef | 0:d26c1b55cfca | 394 | if (p_header_changed) { |
DieterGraef | 0:d26c1b55cfca | 395 | /* and move payload to UDP data again */ |
DieterGraef | 0:d26c1b55cfca | 396 | pbuf_header(p, -(s16_t)((IPH_HL(iphdr) * 4) + UDP_HLEN)); |
DieterGraef | 0:d26c1b55cfca | 397 | } |
DieterGraef | 0:d26c1b55cfca | 398 | } |
DieterGraef | 0:d26c1b55cfca | 399 | #endif /* SO_REUSE && SO_REUSE_RXTOALL */ |
DieterGraef | 0:d26c1b55cfca | 400 | /* callback */ |
DieterGraef | 0:d26c1b55cfca | 401 | if (pcb->recv != NULL) { |
DieterGraef | 0:d26c1b55cfca | 402 | /* now the recv function is responsible for freeing p */ |
DieterGraef | 0:d26c1b55cfca | 403 | pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr(), src); |
DieterGraef | 0:d26c1b55cfca | 404 | } else { |
DieterGraef | 0:d26c1b55cfca | 405 | /* no recv function registered? then we have to free the pbuf! */ |
DieterGraef | 0:d26c1b55cfca | 406 | pbuf_free(p); |
DieterGraef | 0:d26c1b55cfca | 407 | goto end; |
DieterGraef | 0:d26c1b55cfca | 408 | } |
DieterGraef | 0:d26c1b55cfca | 409 | } else { |
DieterGraef | 0:d26c1b55cfca | 410 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_input: not for us.\n")); |
DieterGraef | 0:d26c1b55cfca | 411 | |
DieterGraef | 0:d26c1b55cfca | 412 | #if LWIP_ICMP |
DieterGraef | 0:d26c1b55cfca | 413 | /* No match was found, send ICMP destination port unreachable unless |
DieterGraef | 0:d26c1b55cfca | 414 | destination address was broadcast/multicast. */ |
DieterGraef | 0:d26c1b55cfca | 415 | if (!broadcast && |
DieterGraef | 0:d26c1b55cfca | 416 | !ip_addr_ismulticast(¤t_iphdr_dest)) { |
DieterGraef | 0:d26c1b55cfca | 417 | /* move payload pointer back to ip header */ |
DieterGraef | 0:d26c1b55cfca | 418 | pbuf_header(p, (IPH_HL(iphdr) * 4) + UDP_HLEN); |
DieterGraef | 0:d26c1b55cfca | 419 | LWIP_ASSERT("p->payload == iphdr", (p->payload == iphdr)); |
DieterGraef | 0:d26c1b55cfca | 420 | icmp_dest_unreach(p, ICMP_DUR_PORT); |
DieterGraef | 0:d26c1b55cfca | 421 | } |
DieterGraef | 0:d26c1b55cfca | 422 | #endif /* LWIP_ICMP */ |
DieterGraef | 0:d26c1b55cfca | 423 | UDP_STATS_INC(udp.proterr); |
DieterGraef | 0:d26c1b55cfca | 424 | UDP_STATS_INC(udp.drop); |
DieterGraef | 0:d26c1b55cfca | 425 | snmp_inc_udpnoports(); |
DieterGraef | 0:d26c1b55cfca | 426 | pbuf_free(p); |
DieterGraef | 0:d26c1b55cfca | 427 | } |
DieterGraef | 0:d26c1b55cfca | 428 | } else { |
DieterGraef | 0:d26c1b55cfca | 429 | pbuf_free(p); |
DieterGraef | 0:d26c1b55cfca | 430 | } |
DieterGraef | 0:d26c1b55cfca | 431 | end: |
DieterGraef | 0:d26c1b55cfca | 432 | PERF_STOP("udp_input"); |
DieterGraef | 0:d26c1b55cfca | 433 | } |
DieterGraef | 0:d26c1b55cfca | 434 | |
DieterGraef | 0:d26c1b55cfca | 435 | /** |
DieterGraef | 0:d26c1b55cfca | 436 | * Send data using UDP. |
DieterGraef | 0:d26c1b55cfca | 437 | * |
DieterGraef | 0:d26c1b55cfca | 438 | * @param pcb UDP PCB used to send the data. |
DieterGraef | 0:d26c1b55cfca | 439 | * @param p chain of pbuf's to be sent. |
DieterGraef | 0:d26c1b55cfca | 440 | * |
DieterGraef | 0:d26c1b55cfca | 441 | * The datagram will be sent to the current remote_ip & remote_port |
DieterGraef | 0:d26c1b55cfca | 442 | * stored in pcb. If the pcb is not bound to a port, it will |
DieterGraef | 0:d26c1b55cfca | 443 | * automatically be bound to a random port. |
DieterGraef | 0:d26c1b55cfca | 444 | * |
DieterGraef | 0:d26c1b55cfca | 445 | * @return lwIP error code. |
DieterGraef | 0:d26c1b55cfca | 446 | * - ERR_OK. Successful. No error occured. |
DieterGraef | 0:d26c1b55cfca | 447 | * - ERR_MEM. Out of memory. |
DieterGraef | 0:d26c1b55cfca | 448 | * - ERR_RTE. Could not find route to destination address. |
DieterGraef | 0:d26c1b55cfca | 449 | * - More errors could be returned by lower protocol layers. |
DieterGraef | 0:d26c1b55cfca | 450 | * |
DieterGraef | 0:d26c1b55cfca | 451 | * @see udp_disconnect() udp_sendto() |
DieterGraef | 0:d26c1b55cfca | 452 | */ |
DieterGraef | 0:d26c1b55cfca | 453 | err_t |
DieterGraef | 0:d26c1b55cfca | 454 | udp_send(struct udp_pcb *pcb, struct pbuf *p) |
DieterGraef | 0:d26c1b55cfca | 455 | { |
DieterGraef | 0:d26c1b55cfca | 456 | /* send to the packet using remote ip and port stored in the pcb */ |
DieterGraef | 0:d26c1b55cfca | 457 | return udp_sendto(pcb, p, &pcb->remote_ip, pcb->remote_port); |
DieterGraef | 0:d26c1b55cfca | 458 | } |
DieterGraef | 0:d26c1b55cfca | 459 | |
DieterGraef | 0:d26c1b55cfca | 460 | #if LWIP_CHECKSUM_ON_COPY |
DieterGraef | 0:d26c1b55cfca | 461 | /** Same as udp_send() but with checksum |
DieterGraef | 0:d26c1b55cfca | 462 | */ |
DieterGraef | 0:d26c1b55cfca | 463 | err_t |
DieterGraef | 0:d26c1b55cfca | 464 | udp_send_chksum(struct udp_pcb *pcb, struct pbuf *p, |
DieterGraef | 0:d26c1b55cfca | 465 | u8_t have_chksum, u16_t chksum) |
DieterGraef | 0:d26c1b55cfca | 466 | { |
DieterGraef | 0:d26c1b55cfca | 467 | /* send to the packet using remote ip and port stored in the pcb */ |
DieterGraef | 0:d26c1b55cfca | 468 | return udp_sendto_chksum(pcb, p, &pcb->remote_ip, pcb->remote_port, |
DieterGraef | 0:d26c1b55cfca | 469 | have_chksum, chksum); |
DieterGraef | 0:d26c1b55cfca | 470 | } |
DieterGraef | 0:d26c1b55cfca | 471 | #endif /* LWIP_CHECKSUM_ON_COPY */ |
DieterGraef | 0:d26c1b55cfca | 472 | |
DieterGraef | 0:d26c1b55cfca | 473 | /** |
DieterGraef | 0:d26c1b55cfca | 474 | * Send data to a specified address using UDP. |
DieterGraef | 0:d26c1b55cfca | 475 | * |
DieterGraef | 0:d26c1b55cfca | 476 | * @param pcb UDP PCB used to send the data. |
DieterGraef | 0:d26c1b55cfca | 477 | * @param p chain of pbuf's to be sent. |
DieterGraef | 0:d26c1b55cfca | 478 | * @param dst_ip Destination IP address. |
DieterGraef | 0:d26c1b55cfca | 479 | * @param dst_port Destination UDP port. |
DieterGraef | 0:d26c1b55cfca | 480 | * |
DieterGraef | 0:d26c1b55cfca | 481 | * dst_ip & dst_port are expected to be in the same byte order as in the pcb. |
DieterGraef | 0:d26c1b55cfca | 482 | * |
DieterGraef | 0:d26c1b55cfca | 483 | * If the PCB already has a remote address association, it will |
DieterGraef | 0:d26c1b55cfca | 484 | * be restored after the data is sent. |
DieterGraef | 0:d26c1b55cfca | 485 | * |
DieterGraef | 0:d26c1b55cfca | 486 | * @return lwIP error code (@see udp_send for possible error codes) |
DieterGraef | 0:d26c1b55cfca | 487 | * |
DieterGraef | 0:d26c1b55cfca | 488 | * @see udp_disconnect() udp_send() |
DieterGraef | 0:d26c1b55cfca | 489 | */ |
DieterGraef | 0:d26c1b55cfca | 490 | err_t |
DieterGraef | 0:d26c1b55cfca | 491 | udp_sendto(struct udp_pcb *pcb, struct pbuf *p, |
DieterGraef | 0:d26c1b55cfca | 492 | ip_addr_t *dst_ip, u16_t dst_port) |
DieterGraef | 0:d26c1b55cfca | 493 | { |
DieterGraef | 0:d26c1b55cfca | 494 | #if LWIP_CHECKSUM_ON_COPY |
DieterGraef | 0:d26c1b55cfca | 495 | return udp_sendto_chksum(pcb, p, dst_ip, dst_port, 0, 0); |
DieterGraef | 0:d26c1b55cfca | 496 | } |
DieterGraef | 0:d26c1b55cfca | 497 | |
DieterGraef | 0:d26c1b55cfca | 498 | /** Same as udp_sendto(), but with checksum */ |
DieterGraef | 0:d26c1b55cfca | 499 | err_t |
DieterGraef | 0:d26c1b55cfca | 500 | udp_sendto_chksum(struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *dst_ip, |
DieterGraef | 0:d26c1b55cfca | 501 | u16_t dst_port, u8_t have_chksum, u16_t chksum) |
DieterGraef | 0:d26c1b55cfca | 502 | { |
DieterGraef | 0:d26c1b55cfca | 503 | #endif /* LWIP_CHECKSUM_ON_COPY */ |
DieterGraef | 0:d26c1b55cfca | 504 | struct netif *netif; |
DieterGraef | 0:d26c1b55cfca | 505 | |
DieterGraef | 0:d26c1b55cfca | 506 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_send\n")); |
DieterGraef | 0:d26c1b55cfca | 507 | |
DieterGraef | 0:d26c1b55cfca | 508 | /* find the outgoing network interface for this packet */ |
DieterGraef | 0:d26c1b55cfca | 509 | #if LWIP_IGMP |
DieterGraef | 0:d26c1b55cfca | 510 | netif = ip_route((ip_addr_ismulticast(dst_ip))?(&(pcb->multicast_ip)):(dst_ip)); |
DieterGraef | 0:d26c1b55cfca | 511 | #else |
DieterGraef | 0:d26c1b55cfca | 512 | netif = ip_route(dst_ip); |
DieterGraef | 0:d26c1b55cfca | 513 | #endif /* LWIP_IGMP */ |
DieterGraef | 0:d26c1b55cfca | 514 | |
DieterGraef | 0:d26c1b55cfca | 515 | /* no outgoing network interface could be found? */ |
DieterGraef | 0:d26c1b55cfca | 516 | if (netif == NULL) { |
DieterGraef | 0:d26c1b55cfca | 517 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("udp_send: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n", |
DieterGraef | 0:d26c1b55cfca | 518 | ip4_addr1_16(dst_ip), ip4_addr2_16(dst_ip), ip4_addr3_16(dst_ip), ip4_addr4_16(dst_ip))); |
DieterGraef | 0:d26c1b55cfca | 519 | UDP_STATS_INC(udp.rterr); |
DieterGraef | 0:d26c1b55cfca | 520 | return ERR_RTE; |
DieterGraef | 0:d26c1b55cfca | 521 | } |
DieterGraef | 0:d26c1b55cfca | 522 | #if LWIP_CHECKSUM_ON_COPY |
DieterGraef | 0:d26c1b55cfca | 523 | return udp_sendto_if_chksum(pcb, p, dst_ip, dst_port, netif, have_chksum, chksum); |
DieterGraef | 0:d26c1b55cfca | 524 | #else /* LWIP_CHECKSUM_ON_COPY */ |
DieterGraef | 0:d26c1b55cfca | 525 | return udp_sendto_if(pcb, p, dst_ip, dst_port, netif); |
DieterGraef | 0:d26c1b55cfca | 526 | #endif /* LWIP_CHECKSUM_ON_COPY */ |
DieterGraef | 0:d26c1b55cfca | 527 | } |
DieterGraef | 0:d26c1b55cfca | 528 | |
DieterGraef | 0:d26c1b55cfca | 529 | /** |
DieterGraef | 0:d26c1b55cfca | 530 | * Send data to a specified address using UDP. |
DieterGraef | 0:d26c1b55cfca | 531 | * The netif used for sending can be specified. |
DieterGraef | 0:d26c1b55cfca | 532 | * |
DieterGraef | 0:d26c1b55cfca | 533 | * This function exists mainly for DHCP, to be able to send UDP packets |
DieterGraef | 0:d26c1b55cfca | 534 | * on a netif that is still down. |
DieterGraef | 0:d26c1b55cfca | 535 | * |
DieterGraef | 0:d26c1b55cfca | 536 | * @param pcb UDP PCB used to send the data. |
DieterGraef | 0:d26c1b55cfca | 537 | * @param p chain of pbuf's to be sent. |
DieterGraef | 0:d26c1b55cfca | 538 | * @param dst_ip Destination IP address. |
DieterGraef | 0:d26c1b55cfca | 539 | * @param dst_port Destination UDP port. |
DieterGraef | 0:d26c1b55cfca | 540 | * @param netif the netif used for sending. |
DieterGraef | 0:d26c1b55cfca | 541 | * |
DieterGraef | 0:d26c1b55cfca | 542 | * dst_ip & dst_port are expected to be in the same byte order as in the pcb. |
DieterGraef | 0:d26c1b55cfca | 543 | * |
DieterGraef | 0:d26c1b55cfca | 544 | * @return lwIP error code (@see udp_send for possible error codes) |
DieterGraef | 0:d26c1b55cfca | 545 | * |
DieterGraef | 0:d26c1b55cfca | 546 | * @see udp_disconnect() udp_send() |
DieterGraef | 0:d26c1b55cfca | 547 | */ |
DieterGraef | 0:d26c1b55cfca | 548 | err_t |
DieterGraef | 0:d26c1b55cfca | 549 | udp_sendto_if(struct udp_pcb *pcb, struct pbuf *p, |
DieterGraef | 0:d26c1b55cfca | 550 | ip_addr_t *dst_ip, u16_t dst_port, struct netif *netif) |
DieterGraef | 0:d26c1b55cfca | 551 | { |
DieterGraef | 0:d26c1b55cfca | 552 | #if LWIP_CHECKSUM_ON_COPY |
DieterGraef | 0:d26c1b55cfca | 553 | return udp_sendto_if_chksum(pcb, p, dst_ip, dst_port, netif, 0, 0); |
DieterGraef | 0:d26c1b55cfca | 554 | } |
DieterGraef | 0:d26c1b55cfca | 555 | |
DieterGraef | 0:d26c1b55cfca | 556 | /** Same as udp_sendto_if(), but with checksum */ |
DieterGraef | 0:d26c1b55cfca | 557 | err_t |
DieterGraef | 0:d26c1b55cfca | 558 | udp_sendto_if_chksum(struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *dst_ip, |
DieterGraef | 0:d26c1b55cfca | 559 | u16_t dst_port, struct netif *netif, u8_t have_chksum, |
DieterGraef | 0:d26c1b55cfca | 560 | u16_t chksum) |
DieterGraef | 0:d26c1b55cfca | 561 | { |
DieterGraef | 0:d26c1b55cfca | 562 | #endif /* LWIP_CHECKSUM_ON_COPY */ |
DieterGraef | 0:d26c1b55cfca | 563 | struct udp_hdr *udphdr; |
DieterGraef | 0:d26c1b55cfca | 564 | ip_addr_t *src_ip; |
DieterGraef | 0:d26c1b55cfca | 565 | err_t err; |
DieterGraef | 0:d26c1b55cfca | 566 | struct pbuf *q; /* q will be sent down the stack */ |
DieterGraef | 0:d26c1b55cfca | 567 | |
DieterGraef | 0:d26c1b55cfca | 568 | #if IP_SOF_BROADCAST |
DieterGraef | 0:d26c1b55cfca | 569 | /* broadcast filter? */ |
DieterGraef | 0:d26c1b55cfca | 570 | if (!ip_get_option(pcb, SOF_BROADCAST) && ip_addr_isbroadcast(dst_ip, netif)) { |
DieterGraef | 0:d26c1b55cfca | 571 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, |
DieterGraef | 0:d26c1b55cfca | 572 | ("udp_sendto_if: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb)); |
DieterGraef | 0:d26c1b55cfca | 573 | return ERR_VAL; |
DieterGraef | 0:d26c1b55cfca | 574 | } |
DieterGraef | 0:d26c1b55cfca | 575 | #endif /* IP_SOF_BROADCAST */ |
DieterGraef | 0:d26c1b55cfca | 576 | |
DieterGraef | 0:d26c1b55cfca | 577 | /* if the PCB is not yet bound to a port, bind it here */ |
DieterGraef | 0:d26c1b55cfca | 578 | if (pcb->local_port == 0) { |
DieterGraef | 0:d26c1b55cfca | 579 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_send: not yet bound to a port, binding now\n")); |
DieterGraef | 0:d26c1b55cfca | 580 | err = udp_bind(pcb, &pcb->local_ip, pcb->local_port); |
DieterGraef | 0:d26c1b55cfca | 581 | if (err != ERR_OK) { |
DieterGraef | 0:d26c1b55cfca | 582 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("udp_send: forced port bind failed\n")); |
DieterGraef | 0:d26c1b55cfca | 583 | return err; |
DieterGraef | 0:d26c1b55cfca | 584 | } |
DieterGraef | 0:d26c1b55cfca | 585 | } |
DieterGraef | 0:d26c1b55cfca | 586 | |
DieterGraef | 0:d26c1b55cfca | 587 | /* not enough space to add an UDP header to first pbuf in given p chain? */ |
DieterGraef | 0:d26c1b55cfca | 588 | if (pbuf_header(p, UDP_HLEN)) { |
DieterGraef | 0:d26c1b55cfca | 589 | /* allocate header in a separate new pbuf */ |
DieterGraef | 0:d26c1b55cfca | 590 | q = pbuf_alloc(PBUF_IP, UDP_HLEN, PBUF_RAM); |
DieterGraef | 0:d26c1b55cfca | 591 | /* new header pbuf could not be allocated? */ |
DieterGraef | 0:d26c1b55cfca | 592 | if (q == NULL) { |
DieterGraef | 0:d26c1b55cfca | 593 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_LEVEL_SERIOUS, ("udp_send: could not allocate header\n")); |
DieterGraef | 0:d26c1b55cfca | 594 | return ERR_MEM; |
DieterGraef | 0:d26c1b55cfca | 595 | } |
DieterGraef | 0:d26c1b55cfca | 596 | if (p->tot_len != 0) { |
DieterGraef | 0:d26c1b55cfca | 597 | /* chain header q in front of given pbuf p (only if p contains data) */ |
DieterGraef | 0:d26c1b55cfca | 598 | pbuf_chain(q, p); |
DieterGraef | 0:d26c1b55cfca | 599 | } |
DieterGraef | 0:d26c1b55cfca | 600 | /* first pbuf q points to header pbuf */ |
DieterGraef | 0:d26c1b55cfca | 601 | LWIP_DEBUGF(UDP_DEBUG, |
DieterGraef | 0:d26c1b55cfca | 602 | ("udp_send: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p)); |
DieterGraef | 0:d26c1b55cfca | 603 | } else { |
DieterGraef | 0:d26c1b55cfca | 604 | /* adding space for header within p succeeded */ |
DieterGraef | 0:d26c1b55cfca | 605 | /* first pbuf q equals given pbuf */ |
DieterGraef | 0:d26c1b55cfca | 606 | q = p; |
DieterGraef | 0:d26c1b55cfca | 607 | LWIP_DEBUGF(UDP_DEBUG, ("udp_send: added header in given pbuf %p\n", (void *)p)); |
DieterGraef | 0:d26c1b55cfca | 608 | } |
DieterGraef | 0:d26c1b55cfca | 609 | LWIP_ASSERT("check that first pbuf can hold struct udp_hdr", |
DieterGraef | 0:d26c1b55cfca | 610 | (q->len >= sizeof(struct udp_hdr))); |
DieterGraef | 0:d26c1b55cfca | 611 | /* q now represents the packet to be sent */ |
DieterGraef | 0:d26c1b55cfca | 612 | udphdr = (struct udp_hdr *)q->payload; |
DieterGraef | 0:d26c1b55cfca | 613 | udphdr->src = htons(pcb->local_port); |
DieterGraef | 0:d26c1b55cfca | 614 | udphdr->dest = htons(dst_port); |
DieterGraef | 0:d26c1b55cfca | 615 | /* in UDP, 0 checksum means 'no checksum' */ |
DieterGraef | 0:d26c1b55cfca | 616 | udphdr->chksum = 0x0000; |
DieterGraef | 0:d26c1b55cfca | 617 | |
DieterGraef | 0:d26c1b55cfca | 618 | /* Multicast Loop? */ |
DieterGraef | 0:d26c1b55cfca | 619 | #if LWIP_IGMP |
DieterGraef | 0:d26c1b55cfca | 620 | if (ip_addr_ismulticast(dst_ip) && ((pcb->flags & UDP_FLAGS_MULTICAST_LOOP) != 0)) { |
DieterGraef | 0:d26c1b55cfca | 621 | q->flags |= PBUF_FLAG_MCASTLOOP; |
DieterGraef | 0:d26c1b55cfca | 622 | } |
DieterGraef | 0:d26c1b55cfca | 623 | #endif /* LWIP_IGMP */ |
DieterGraef | 0:d26c1b55cfca | 624 | |
DieterGraef | 0:d26c1b55cfca | 625 | |
DieterGraef | 0:d26c1b55cfca | 626 | /* PCB local address is IP_ANY_ADDR? */ |
DieterGraef | 0:d26c1b55cfca | 627 | if (ip_addr_isany(&pcb->local_ip)) { |
DieterGraef | 0:d26c1b55cfca | 628 | /* use outgoing network interface IP address as source address */ |
DieterGraef | 0:d26c1b55cfca | 629 | src_ip = &(netif->ip_addr); |
DieterGraef | 0:d26c1b55cfca | 630 | } else { |
DieterGraef | 0:d26c1b55cfca | 631 | /* check if UDP PCB local IP address is correct |
DieterGraef | 0:d26c1b55cfca | 632 | * this could be an old address if netif->ip_addr has changed */ |
DieterGraef | 0:d26c1b55cfca | 633 | if (!ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) { |
DieterGraef | 0:d26c1b55cfca | 634 | /* local_ip doesn't match, drop the packet */ |
DieterGraef | 0:d26c1b55cfca | 635 | if (q != p) { |
DieterGraef | 0:d26c1b55cfca | 636 | /* free the header pbuf */ |
DieterGraef | 0:d26c1b55cfca | 637 | pbuf_free(q); |
DieterGraef | 0:d26c1b55cfca | 638 | q = NULL; |
DieterGraef | 0:d26c1b55cfca | 639 | /* p is still referenced by the caller, and will live on */ |
DieterGraef | 0:d26c1b55cfca | 640 | } |
DieterGraef | 0:d26c1b55cfca | 641 | return ERR_VAL; |
DieterGraef | 0:d26c1b55cfca | 642 | } |
DieterGraef | 0:d26c1b55cfca | 643 | /* use UDP PCB local IP address as source address */ |
DieterGraef | 0:d26c1b55cfca | 644 | src_ip = &(pcb->local_ip); |
DieterGraef | 0:d26c1b55cfca | 645 | } |
DieterGraef | 0:d26c1b55cfca | 646 | |
DieterGraef | 0:d26c1b55cfca | 647 | LWIP_DEBUGF(UDP_DEBUG, ("udp_send: sending datagram of length %"U16_F"\n", q->tot_len)); |
DieterGraef | 0:d26c1b55cfca | 648 | |
DieterGraef | 0:d26c1b55cfca | 649 | #if LWIP_UDPLITE |
DieterGraef | 0:d26c1b55cfca | 650 | /* UDP Lite protocol? */ |
DieterGraef | 0:d26c1b55cfca | 651 | if (pcb->flags & UDP_FLAGS_UDPLITE) { |
DieterGraef | 0:d26c1b55cfca | 652 | u16_t chklen, chklen_hdr; |
DieterGraef | 0:d26c1b55cfca | 653 | LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE packet length %"U16_F"\n", q->tot_len)); |
DieterGraef | 0:d26c1b55cfca | 654 | /* set UDP message length in UDP header */ |
DieterGraef | 0:d26c1b55cfca | 655 | chklen_hdr = chklen = pcb->chksum_len_tx; |
DieterGraef | 0:d26c1b55cfca | 656 | if ((chklen < sizeof(struct udp_hdr)) || (chklen > q->tot_len)) { |
DieterGraef | 0:d26c1b55cfca | 657 | if (chklen != 0) { |
DieterGraef | 0:d26c1b55cfca | 658 | LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE pcb->chksum_len is illegal: %"U16_F"\n", chklen)); |
DieterGraef | 0:d26c1b55cfca | 659 | } |
DieterGraef | 0:d26c1b55cfca | 660 | /* For UDP-Lite, checksum length of 0 means checksum |
DieterGraef | 0:d26c1b55cfca | 661 | over the complete packet. (See RFC 3828 chap. 3.1) |
DieterGraef | 0:d26c1b55cfca | 662 | At least the UDP-Lite header must be covered by the |
DieterGraef | 0:d26c1b55cfca | 663 | checksum, therefore, if chksum_len has an illegal |
DieterGraef | 0:d26c1b55cfca | 664 | value, we generate the checksum over the complete |
DieterGraef | 0:d26c1b55cfca | 665 | packet to be safe. */ |
DieterGraef | 0:d26c1b55cfca | 666 | chklen_hdr = 0; |
DieterGraef | 0:d26c1b55cfca | 667 | chklen = q->tot_len; |
DieterGraef | 0:d26c1b55cfca | 668 | } |
DieterGraef | 0:d26c1b55cfca | 669 | udphdr->len = htons(chklen_hdr); |
DieterGraef | 0:d26c1b55cfca | 670 | /* calculate checksum */ |
DieterGraef | 0:d26c1b55cfca | 671 | #if CHECKSUM_GEN_UDP |
DieterGraef | 0:d26c1b55cfca | 672 | udphdr->chksum = inet_chksum_pseudo_partial(q, src_ip, dst_ip, |
DieterGraef | 0:d26c1b55cfca | 673 | IP_PROTO_UDPLITE, q->tot_len, |
DieterGraef | 0:d26c1b55cfca | 674 | #if !LWIP_CHECKSUM_ON_COPY |
DieterGraef | 0:d26c1b55cfca | 675 | chklen); |
DieterGraef | 0:d26c1b55cfca | 676 | #else /* !LWIP_CHECKSUM_ON_COPY */ |
DieterGraef | 0:d26c1b55cfca | 677 | (have_chksum ? UDP_HLEN : chklen)); |
DieterGraef | 0:d26c1b55cfca | 678 | if (have_chksum) { |
DieterGraef | 0:d26c1b55cfca | 679 | u32_t acc; |
DieterGraef | 0:d26c1b55cfca | 680 | acc = udphdr->chksum + (u16_t)~(chksum); |
DieterGraef | 0:d26c1b55cfca | 681 | udphdr->chksum = FOLD_U32T(acc); |
DieterGraef | 0:d26c1b55cfca | 682 | } |
DieterGraef | 0:d26c1b55cfca | 683 | #endif /* !LWIP_CHECKSUM_ON_COPY */ |
DieterGraef | 0:d26c1b55cfca | 684 | |
DieterGraef | 0:d26c1b55cfca | 685 | /* chksum zero must become 0xffff, as zero means 'no checksum' */ |
DieterGraef | 0:d26c1b55cfca | 686 | if (udphdr->chksum == 0x0000) { |
DieterGraef | 0:d26c1b55cfca | 687 | udphdr->chksum = 0xffff; |
DieterGraef | 0:d26c1b55cfca | 688 | } |
DieterGraef | 0:d26c1b55cfca | 689 | #endif /* CHECKSUM_GEN_UDP */ |
DieterGraef | 0:d26c1b55cfca | 690 | /* output to IP */ |
DieterGraef | 0:d26c1b55cfca | 691 | LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDPLITE,)\n")); |
DieterGraef | 0:d26c1b55cfca | 692 | NETIF_SET_HWADDRHINT(netif, &pcb->addr_hint); |
DieterGraef | 0:d26c1b55cfca | 693 | err = ip_output_if(q, src_ip, dst_ip, pcb->ttl, pcb->tos, IP_PROTO_UDPLITE, netif); |
DieterGraef | 0:d26c1b55cfca | 694 | NETIF_SET_HWADDRHINT(netif, NULL); |
DieterGraef | 0:d26c1b55cfca | 695 | } else |
DieterGraef | 0:d26c1b55cfca | 696 | #endif /* LWIP_UDPLITE */ |
DieterGraef | 0:d26c1b55cfca | 697 | { /* UDP */ |
DieterGraef | 0:d26c1b55cfca | 698 | LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP packet length %"U16_F"\n", q->tot_len)); |
DieterGraef | 0:d26c1b55cfca | 699 | udphdr->len = htons(q->tot_len); |
DieterGraef | 0:d26c1b55cfca | 700 | /* calculate checksum */ |
DieterGraef | 0:d26c1b55cfca | 701 | #if CHECKSUM_GEN_UDP |
DieterGraef | 0:d26c1b55cfca | 702 | if ((pcb->flags & UDP_FLAGS_NOCHKSUM) == 0) { |
DieterGraef | 0:d26c1b55cfca | 703 | u16_t udpchksum; |
DieterGraef | 0:d26c1b55cfca | 704 | #if LWIP_CHECKSUM_ON_COPY |
DieterGraef | 0:d26c1b55cfca | 705 | if (have_chksum) { |
DieterGraef | 0:d26c1b55cfca | 706 | u32_t acc; |
DieterGraef | 0:d26c1b55cfca | 707 | udpchksum = inet_chksum_pseudo_partial(q, src_ip, dst_ip, IP_PROTO_UDP, |
DieterGraef | 0:d26c1b55cfca | 708 | q->tot_len, UDP_HLEN); |
DieterGraef | 0:d26c1b55cfca | 709 | acc = udpchksum + (u16_t)~(chksum); |
DieterGraef | 0:d26c1b55cfca | 710 | udpchksum = FOLD_U32T(acc); |
DieterGraef | 0:d26c1b55cfca | 711 | } else |
DieterGraef | 0:d26c1b55cfca | 712 | #endif /* LWIP_CHECKSUM_ON_COPY */ |
DieterGraef | 0:d26c1b55cfca | 713 | { |
DieterGraef | 0:d26c1b55cfca | 714 | udpchksum = inet_chksum_pseudo(q, src_ip, dst_ip, IP_PROTO_UDP, q->tot_len); |
DieterGraef | 0:d26c1b55cfca | 715 | } |
DieterGraef | 0:d26c1b55cfca | 716 | |
DieterGraef | 0:d26c1b55cfca | 717 | /* chksum zero must become 0xffff, as zero means 'no checksum' */ |
DieterGraef | 0:d26c1b55cfca | 718 | if (udpchksum == 0x0000) { |
DieterGraef | 0:d26c1b55cfca | 719 | udpchksum = 0xffff; |
DieterGraef | 0:d26c1b55cfca | 720 | } |
DieterGraef | 0:d26c1b55cfca | 721 | udphdr->chksum = udpchksum; |
DieterGraef | 0:d26c1b55cfca | 722 | } |
DieterGraef | 0:d26c1b55cfca | 723 | #endif /* CHECKSUM_GEN_UDP */ |
DieterGraef | 0:d26c1b55cfca | 724 | LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP checksum 0x%04"X16_F"\n", udphdr->chksum)); |
DieterGraef | 0:d26c1b55cfca | 725 | LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDP,)\n")); |
DieterGraef | 0:d26c1b55cfca | 726 | /* output to IP */ |
DieterGraef | 0:d26c1b55cfca | 727 | NETIF_SET_HWADDRHINT(netif, &pcb->addr_hint); |
DieterGraef | 0:d26c1b55cfca | 728 | err = ip_output_if(q, src_ip, dst_ip, pcb->ttl, pcb->tos, IP_PROTO_UDP, netif); |
DieterGraef | 0:d26c1b55cfca | 729 | NETIF_SET_HWADDRHINT(netif, NULL); |
DieterGraef | 0:d26c1b55cfca | 730 | } |
DieterGraef | 0:d26c1b55cfca | 731 | /* TODO: must this be increased even if error occured? */ |
DieterGraef | 0:d26c1b55cfca | 732 | snmp_inc_udpoutdatagrams(); |
DieterGraef | 0:d26c1b55cfca | 733 | |
DieterGraef | 0:d26c1b55cfca | 734 | /* did we chain a separate header pbuf earlier? */ |
DieterGraef | 0:d26c1b55cfca | 735 | if (q != p) { |
DieterGraef | 0:d26c1b55cfca | 736 | /* free the header pbuf */ |
DieterGraef | 0:d26c1b55cfca | 737 | pbuf_free(q); |
DieterGraef | 0:d26c1b55cfca | 738 | q = NULL; |
DieterGraef | 0:d26c1b55cfca | 739 | /* p is still referenced by the caller, and will live on */ |
DieterGraef | 0:d26c1b55cfca | 740 | } |
DieterGraef | 0:d26c1b55cfca | 741 | |
DieterGraef | 0:d26c1b55cfca | 742 | UDP_STATS_INC(udp.xmit); |
DieterGraef | 0:d26c1b55cfca | 743 | return err; |
DieterGraef | 0:d26c1b55cfca | 744 | } |
DieterGraef | 0:d26c1b55cfca | 745 | |
DieterGraef | 0:d26c1b55cfca | 746 | /** |
DieterGraef | 0:d26c1b55cfca | 747 | * Bind an UDP PCB. |
DieterGraef | 0:d26c1b55cfca | 748 | * |
DieterGraef | 0:d26c1b55cfca | 749 | * @param pcb UDP PCB to be bound with a local address ipaddr and port. |
DieterGraef | 0:d26c1b55cfca | 750 | * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to |
DieterGraef | 0:d26c1b55cfca | 751 | * bind to all local interfaces. |
DieterGraef | 0:d26c1b55cfca | 752 | * @param port local UDP port to bind with. Use 0 to automatically bind |
DieterGraef | 0:d26c1b55cfca | 753 | * to a random port between UDP_LOCAL_PORT_RANGE_START and |
DieterGraef | 0:d26c1b55cfca | 754 | * UDP_LOCAL_PORT_RANGE_END. |
DieterGraef | 0:d26c1b55cfca | 755 | * |
DieterGraef | 0:d26c1b55cfca | 756 | * ipaddr & port are expected to be in the same byte order as in the pcb. |
DieterGraef | 0:d26c1b55cfca | 757 | * |
DieterGraef | 0:d26c1b55cfca | 758 | * @return lwIP error code. |
DieterGraef | 0:d26c1b55cfca | 759 | * - ERR_OK. Successful. No error occured. |
DieterGraef | 0:d26c1b55cfca | 760 | * - ERR_USE. The specified ipaddr and port are already bound to by |
DieterGraef | 0:d26c1b55cfca | 761 | * another UDP PCB. |
DieterGraef | 0:d26c1b55cfca | 762 | * |
DieterGraef | 0:d26c1b55cfca | 763 | * @see udp_disconnect() |
DieterGraef | 0:d26c1b55cfca | 764 | */ |
DieterGraef | 0:d26c1b55cfca | 765 | err_t |
DieterGraef | 0:d26c1b55cfca | 766 | udp_bind(struct udp_pcb *pcb, ip_addr_t *ipaddr, u16_t port) |
DieterGraef | 0:d26c1b55cfca | 767 | { |
DieterGraef | 0:d26c1b55cfca | 768 | struct udp_pcb *ipcb; |
DieterGraef | 0:d26c1b55cfca | 769 | u8_t rebind; |
DieterGraef | 0:d26c1b55cfca | 770 | |
DieterGraef | 0:d26c1b55cfca | 771 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_bind(ipaddr = ")); |
DieterGraef | 0:d26c1b55cfca | 772 | ip_addr_debug_print(UDP_DEBUG, ipaddr); |
DieterGraef | 0:d26c1b55cfca | 773 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, (", port = %"U16_F")\n", port)); |
DieterGraef | 0:d26c1b55cfca | 774 | |
DieterGraef | 0:d26c1b55cfca | 775 | rebind = 0; |
DieterGraef | 0:d26c1b55cfca | 776 | /* Check for double bind and rebind of the same pcb */ |
DieterGraef | 0:d26c1b55cfca | 777 | for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) { |
DieterGraef | 0:d26c1b55cfca | 778 | /* is this UDP PCB already on active list? */ |
DieterGraef | 0:d26c1b55cfca | 779 | if (pcb == ipcb) { |
DieterGraef | 0:d26c1b55cfca | 780 | /* pcb may occur at most once in active list */ |
DieterGraef | 0:d26c1b55cfca | 781 | LWIP_ASSERT("rebind == 0", rebind == 0); |
DieterGraef | 0:d26c1b55cfca | 782 | /* pcb already in list, just rebind */ |
DieterGraef | 0:d26c1b55cfca | 783 | rebind = 1; |
DieterGraef | 0:d26c1b55cfca | 784 | } |
DieterGraef | 0:d26c1b55cfca | 785 | |
DieterGraef | 0:d26c1b55cfca | 786 | /* By default, we don't allow to bind to a port that any other udp |
DieterGraef | 0:d26c1b55cfca | 787 | PCB is alread bound to, unless *all* PCBs with that port have tha |
DieterGraef | 0:d26c1b55cfca | 788 | REUSEADDR flag set. */ |
DieterGraef | 0:d26c1b55cfca | 789 | #if SO_REUSE |
DieterGraef | 0:d26c1b55cfca | 790 | else if (!ip_get_option(pcb, SOF_REUSEADDR) && |
DieterGraef | 0:d26c1b55cfca | 791 | !ip_get_option(ipcb, SOF_REUSEADDR)) { |
DieterGraef | 0:d26c1b55cfca | 792 | #else /* SO_REUSE */ |
DieterGraef | 0:d26c1b55cfca | 793 | /* port matches that of PCB in list and REUSEADDR not set -> reject */ |
DieterGraef | 0:d26c1b55cfca | 794 | else { |
DieterGraef | 0:d26c1b55cfca | 795 | #endif /* SO_REUSE */ |
DieterGraef | 0:d26c1b55cfca | 796 | if ((ipcb->local_port == port) && |
DieterGraef | 0:d26c1b55cfca | 797 | /* IP address matches, or one is IP_ADDR_ANY? */ |
DieterGraef | 0:d26c1b55cfca | 798 | (ip_addr_isany(&(ipcb->local_ip)) || |
DieterGraef | 0:d26c1b55cfca | 799 | ip_addr_isany(ipaddr) || |
DieterGraef | 0:d26c1b55cfca | 800 | ip_addr_cmp(&(ipcb->local_ip), ipaddr))) { |
DieterGraef | 0:d26c1b55cfca | 801 | /* other PCB already binds to this local IP and port */ |
DieterGraef | 0:d26c1b55cfca | 802 | LWIP_DEBUGF(UDP_DEBUG, |
DieterGraef | 0:d26c1b55cfca | 803 | ("udp_bind: local port %"U16_F" already bound by another pcb\n", port)); |
DieterGraef | 0:d26c1b55cfca | 804 | return ERR_USE; |
DieterGraef | 0:d26c1b55cfca | 805 | } |
DieterGraef | 0:d26c1b55cfca | 806 | } |
DieterGraef | 0:d26c1b55cfca | 807 | } |
DieterGraef | 0:d26c1b55cfca | 808 | |
DieterGraef | 0:d26c1b55cfca | 809 | ip_addr_set(&pcb->local_ip, ipaddr); |
DieterGraef | 0:d26c1b55cfca | 810 | |
DieterGraef | 0:d26c1b55cfca | 811 | /* no port specified? */ |
DieterGraef | 0:d26c1b55cfca | 812 | if (port == 0) { |
DieterGraef | 0:d26c1b55cfca | 813 | port = udp_new_port(); |
DieterGraef | 0:d26c1b55cfca | 814 | if (port == 0) { |
DieterGraef | 0:d26c1b55cfca | 815 | /* no more ports available in local range */ |
DieterGraef | 0:d26c1b55cfca | 816 | LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: out of free UDP ports\n")); |
DieterGraef | 0:d26c1b55cfca | 817 | return ERR_USE; |
DieterGraef | 0:d26c1b55cfca | 818 | } |
DieterGraef | 0:d26c1b55cfca | 819 | } |
DieterGraef | 0:d26c1b55cfca | 820 | pcb->local_port = port; |
DieterGraef | 0:d26c1b55cfca | 821 | snmp_insert_udpidx_tree(pcb); |
DieterGraef | 0:d26c1b55cfca | 822 | /* pcb not active yet? */ |
DieterGraef | 0:d26c1b55cfca | 823 | if (rebind == 0) { |
DieterGraef | 0:d26c1b55cfca | 824 | /* place the PCB on the active list if not already there */ |
DieterGraef | 0:d26c1b55cfca | 825 | pcb->next = udp_pcbs; |
DieterGraef | 0:d26c1b55cfca | 826 | udp_pcbs = pcb; |
DieterGraef | 0:d26c1b55cfca | 827 | } |
DieterGraef | 0:d26c1b55cfca | 828 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, |
DieterGraef | 0:d26c1b55cfca | 829 | ("udp_bind: bound to %"U16_F".%"U16_F".%"U16_F".%"U16_F", port %"U16_F"\n", |
DieterGraef | 0:d26c1b55cfca | 830 | ip4_addr1_16(&pcb->local_ip), ip4_addr2_16(&pcb->local_ip), |
DieterGraef | 0:d26c1b55cfca | 831 | ip4_addr3_16(&pcb->local_ip), ip4_addr4_16(&pcb->local_ip), |
DieterGraef | 0:d26c1b55cfca | 832 | pcb->local_port)); |
DieterGraef | 0:d26c1b55cfca | 833 | return ERR_OK; |
DieterGraef | 0:d26c1b55cfca | 834 | } |
DieterGraef | 0:d26c1b55cfca | 835 | /** |
DieterGraef | 0:d26c1b55cfca | 836 | * Connect an UDP PCB. |
DieterGraef | 0:d26c1b55cfca | 837 | * |
DieterGraef | 0:d26c1b55cfca | 838 | * This will associate the UDP PCB with the remote address. |
DieterGraef | 0:d26c1b55cfca | 839 | * |
DieterGraef | 0:d26c1b55cfca | 840 | * @param pcb UDP PCB to be connected with remote address ipaddr and port. |
DieterGraef | 0:d26c1b55cfca | 841 | * @param ipaddr remote IP address to connect with. |
DieterGraef | 0:d26c1b55cfca | 842 | * @param port remote UDP port to connect with. |
DieterGraef | 0:d26c1b55cfca | 843 | * |
DieterGraef | 0:d26c1b55cfca | 844 | * @return lwIP error code |
DieterGraef | 0:d26c1b55cfca | 845 | * |
DieterGraef | 0:d26c1b55cfca | 846 | * ipaddr & port are expected to be in the same byte order as in the pcb. |
DieterGraef | 0:d26c1b55cfca | 847 | * |
DieterGraef | 0:d26c1b55cfca | 848 | * The udp pcb is bound to a random local port if not already bound. |
DieterGraef | 0:d26c1b55cfca | 849 | * |
DieterGraef | 0:d26c1b55cfca | 850 | * @see udp_disconnect() |
DieterGraef | 0:d26c1b55cfca | 851 | */ |
DieterGraef | 0:d26c1b55cfca | 852 | err_t |
DieterGraef | 0:d26c1b55cfca | 853 | udp_connect(struct udp_pcb *pcb, ip_addr_t *ipaddr, u16_t port) |
DieterGraef | 0:d26c1b55cfca | 854 | { |
DieterGraef | 0:d26c1b55cfca | 855 | struct udp_pcb *ipcb; |
DieterGraef | 0:d26c1b55cfca | 856 | |
DieterGraef | 0:d26c1b55cfca | 857 | if (pcb->local_port == 0) { |
DieterGraef | 0:d26c1b55cfca | 858 | err_t err = udp_bind(pcb, &pcb->local_ip, pcb->local_port); |
DieterGraef | 0:d26c1b55cfca | 859 | if (err != ERR_OK) { |
DieterGraef | 0:d26c1b55cfca | 860 | return err; |
DieterGraef | 0:d26c1b55cfca | 861 | } |
DieterGraef | 0:d26c1b55cfca | 862 | } |
DieterGraef | 0:d26c1b55cfca | 863 | |
DieterGraef | 0:d26c1b55cfca | 864 | ip_addr_set(&pcb->remote_ip, ipaddr); |
DieterGraef | 0:d26c1b55cfca | 865 | pcb->remote_port = port; |
DieterGraef | 0:d26c1b55cfca | 866 | pcb->flags |= UDP_FLAGS_CONNECTED; |
DieterGraef | 0:d26c1b55cfca | 867 | /** TODO: this functionality belongs in upper layers */ |
DieterGraef | 0:d26c1b55cfca | 868 | #ifdef LWIP_UDP_TODO |
DieterGraef | 0:d26c1b55cfca | 869 | /* Nail down local IP for netconn_addr()/getsockname() */ |
DieterGraef | 0:d26c1b55cfca | 870 | if (ip_addr_isany(&pcb->local_ip) && !ip_addr_isany(&pcb->remote_ip)) { |
DieterGraef | 0:d26c1b55cfca | 871 | struct netif *netif; |
DieterGraef | 0:d26c1b55cfca | 872 | |
DieterGraef | 0:d26c1b55cfca | 873 | if ((netif = ip_route(&(pcb->remote_ip))) == NULL) { |
DieterGraef | 0:d26c1b55cfca | 874 | LWIP_DEBUGF(UDP_DEBUG, ("udp_connect: No route to 0x%lx\n", pcb->remote_ip.addr)); |
DieterGraef | 0:d26c1b55cfca | 875 | UDP_STATS_INC(udp.rterr); |
DieterGraef | 0:d26c1b55cfca | 876 | return ERR_RTE; |
DieterGraef | 0:d26c1b55cfca | 877 | } |
DieterGraef | 0:d26c1b55cfca | 878 | /** TODO: this will bind the udp pcb locally, to the interface which |
DieterGraef | 0:d26c1b55cfca | 879 | is used to route output packets to the remote address. However, we |
DieterGraef | 0:d26c1b55cfca | 880 | might want to accept incoming packets on any interface! */ |
DieterGraef | 0:d26c1b55cfca | 881 | pcb->local_ip = netif->ip_addr; |
DieterGraef | 0:d26c1b55cfca | 882 | } else if (ip_addr_isany(&pcb->remote_ip)) { |
DieterGraef | 0:d26c1b55cfca | 883 | pcb->local_ip.addr = 0; |
DieterGraef | 0:d26c1b55cfca | 884 | } |
DieterGraef | 0:d26c1b55cfca | 885 | #endif |
DieterGraef | 0:d26c1b55cfca | 886 | LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, |
DieterGraef | 0:d26c1b55cfca | 887 | ("udp_connect: connected to %"U16_F".%"U16_F".%"U16_F".%"U16_F",port %"U16_F"\n", |
DieterGraef | 0:d26c1b55cfca | 888 | ip4_addr1_16(&pcb->local_ip), ip4_addr2_16(&pcb->local_ip), |
DieterGraef | 0:d26c1b55cfca | 889 | ip4_addr3_16(&pcb->local_ip), ip4_addr4_16(&pcb->local_ip), |
DieterGraef | 0:d26c1b55cfca | 890 | pcb->local_port)); |
DieterGraef | 0:d26c1b55cfca | 891 | |
DieterGraef | 0:d26c1b55cfca | 892 | /* Insert UDP PCB into the list of active UDP PCBs. */ |
DieterGraef | 0:d26c1b55cfca | 893 | for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) { |
DieterGraef | 0:d26c1b55cfca | 894 | if (pcb == ipcb) { |
DieterGraef | 0:d26c1b55cfca | 895 | /* already on the list, just return */ |
DieterGraef | 0:d26c1b55cfca | 896 | return ERR_OK; |
DieterGraef | 0:d26c1b55cfca | 897 | } |
DieterGraef | 0:d26c1b55cfca | 898 | } |
DieterGraef | 0:d26c1b55cfca | 899 | /* PCB not yet on the list, add PCB now */ |
DieterGraef | 0:d26c1b55cfca | 900 | pcb->next = udp_pcbs; |
DieterGraef | 0:d26c1b55cfca | 901 | udp_pcbs = pcb; |
DieterGraef | 0:d26c1b55cfca | 902 | return ERR_OK; |
DieterGraef | 0:d26c1b55cfca | 903 | } |
DieterGraef | 0:d26c1b55cfca | 904 | |
DieterGraef | 0:d26c1b55cfca | 905 | /** |
DieterGraef | 0:d26c1b55cfca | 906 | * Disconnect a UDP PCB |
DieterGraef | 0:d26c1b55cfca | 907 | * |
DieterGraef | 0:d26c1b55cfca | 908 | * @param pcb the udp pcb to disconnect. |
DieterGraef | 0:d26c1b55cfca | 909 | */ |
DieterGraef | 0:d26c1b55cfca | 910 | void |
DieterGraef | 0:d26c1b55cfca | 911 | udp_disconnect(struct udp_pcb *pcb) |
DieterGraef | 0:d26c1b55cfca | 912 | { |
DieterGraef | 0:d26c1b55cfca | 913 | /* reset remote address association */ |
DieterGraef | 0:d26c1b55cfca | 914 | ip_addr_set_any(&pcb->remote_ip); |
DieterGraef | 0:d26c1b55cfca | 915 | pcb->remote_port = 0; |
DieterGraef | 0:d26c1b55cfca | 916 | /* mark PCB as unconnected */ |
DieterGraef | 0:d26c1b55cfca | 917 | pcb->flags &= ~UDP_FLAGS_CONNECTED; |
DieterGraef | 0:d26c1b55cfca | 918 | } |
DieterGraef | 0:d26c1b55cfca | 919 | |
DieterGraef | 0:d26c1b55cfca | 920 | /** |
DieterGraef | 0:d26c1b55cfca | 921 | * Set a receive callback for a UDP PCB |
DieterGraef | 0:d26c1b55cfca | 922 | * |
DieterGraef | 0:d26c1b55cfca | 923 | * This callback will be called when receiving a datagram for the pcb. |
DieterGraef | 0:d26c1b55cfca | 924 | * |
DieterGraef | 0:d26c1b55cfca | 925 | * @param pcb the pcb for wich to set the recv callback |
DieterGraef | 0:d26c1b55cfca | 926 | * @param recv function pointer of the callback function |
DieterGraef | 0:d26c1b55cfca | 927 | * @param recv_arg additional argument to pass to the callback function |
DieterGraef | 0:d26c1b55cfca | 928 | */ |
DieterGraef | 0:d26c1b55cfca | 929 | void |
DieterGraef | 0:d26c1b55cfca | 930 | udp_recv(struct udp_pcb *pcb, udp_recv_fn recv, void *recv_arg) |
DieterGraef | 0:d26c1b55cfca | 931 | { |
DieterGraef | 0:d26c1b55cfca | 932 | /* remember recv() callback and user data */ |
DieterGraef | 0:d26c1b55cfca | 933 | pcb->recv = recv; |
DieterGraef | 0:d26c1b55cfca | 934 | pcb->recv_arg = recv_arg; |
DieterGraef | 0:d26c1b55cfca | 935 | } |
DieterGraef | 0:d26c1b55cfca | 936 | |
DieterGraef | 0:d26c1b55cfca | 937 | /** |
DieterGraef | 0:d26c1b55cfca | 938 | * Remove an UDP PCB. |
DieterGraef | 0:d26c1b55cfca | 939 | * |
DieterGraef | 0:d26c1b55cfca | 940 | * @param pcb UDP PCB to be removed. The PCB is removed from the list of |
DieterGraef | 0:d26c1b55cfca | 941 | * UDP PCB's and the data structure is freed from memory. |
DieterGraef | 0:d26c1b55cfca | 942 | * |
DieterGraef | 0:d26c1b55cfca | 943 | * @see udp_new() |
DieterGraef | 0:d26c1b55cfca | 944 | */ |
DieterGraef | 0:d26c1b55cfca | 945 | void |
DieterGraef | 0:d26c1b55cfca | 946 | udp_remove(struct udp_pcb *pcb) |
DieterGraef | 0:d26c1b55cfca | 947 | { |
DieterGraef | 0:d26c1b55cfca | 948 | struct udp_pcb *pcb2; |
DieterGraef | 0:d26c1b55cfca | 949 | |
DieterGraef | 0:d26c1b55cfca | 950 | snmp_delete_udpidx_tree(pcb); |
DieterGraef | 0:d26c1b55cfca | 951 | /* pcb to be removed is first in list? */ |
DieterGraef | 0:d26c1b55cfca | 952 | if (udp_pcbs == pcb) { |
DieterGraef | 0:d26c1b55cfca | 953 | /* make list start at 2nd pcb */ |
DieterGraef | 0:d26c1b55cfca | 954 | udp_pcbs = udp_pcbs->next; |
DieterGraef | 0:d26c1b55cfca | 955 | /* pcb not 1st in list */ |
DieterGraef | 0:d26c1b55cfca | 956 | } else { |
DieterGraef | 0:d26c1b55cfca | 957 | for (pcb2 = udp_pcbs; pcb2 != NULL; pcb2 = pcb2->next) { |
DieterGraef | 0:d26c1b55cfca | 958 | /* find pcb in udp_pcbs list */ |
DieterGraef | 0:d26c1b55cfca | 959 | if (pcb2->next != NULL && pcb2->next == pcb) { |
DieterGraef | 0:d26c1b55cfca | 960 | /* remove pcb from list */ |
DieterGraef | 0:d26c1b55cfca | 961 | pcb2->next = pcb->next; |
DieterGraef | 0:d26c1b55cfca | 962 | } |
DieterGraef | 0:d26c1b55cfca | 963 | } |
DieterGraef | 0:d26c1b55cfca | 964 | } |
DieterGraef | 0:d26c1b55cfca | 965 | memp_free(MEMP_UDP_PCB, pcb); |
DieterGraef | 0:d26c1b55cfca | 966 | } |
DieterGraef | 0:d26c1b55cfca | 967 | |
DieterGraef | 0:d26c1b55cfca | 968 | /** |
DieterGraef | 0:d26c1b55cfca | 969 | * Create a UDP PCB. |
DieterGraef | 0:d26c1b55cfca | 970 | * |
DieterGraef | 0:d26c1b55cfca | 971 | * @return The UDP PCB which was created. NULL if the PCB data structure |
DieterGraef | 0:d26c1b55cfca | 972 | * could not be allocated. |
DieterGraef | 0:d26c1b55cfca | 973 | * |
DieterGraef | 0:d26c1b55cfca | 974 | * @see udp_remove() |
DieterGraef | 0:d26c1b55cfca | 975 | */ |
DieterGraef | 0:d26c1b55cfca | 976 | struct udp_pcb * |
DieterGraef | 0:d26c1b55cfca | 977 | udp_new(void) |
DieterGraef | 0:d26c1b55cfca | 978 | { |
DieterGraef | 0:d26c1b55cfca | 979 | struct udp_pcb *pcb; |
DieterGraef | 0:d26c1b55cfca | 980 | pcb = (struct udp_pcb *)memp_malloc(MEMP_UDP_PCB); |
DieterGraef | 0:d26c1b55cfca | 981 | /* could allocate UDP PCB? */ |
DieterGraef | 0:d26c1b55cfca | 982 | if (pcb != NULL) { |
DieterGraef | 0:d26c1b55cfca | 983 | /* UDP Lite: by initializing to all zeroes, chksum_len is set to 0 |
DieterGraef | 0:d26c1b55cfca | 984 | * which means checksum is generated over the whole datagram per default |
DieterGraef | 0:d26c1b55cfca | 985 | * (recommended as default by RFC 3828). */ |
DieterGraef | 0:d26c1b55cfca | 986 | /* initialize PCB to all zeroes */ |
DieterGraef | 0:d26c1b55cfca | 987 | memset(pcb, 0, sizeof(struct udp_pcb)); |
DieterGraef | 0:d26c1b55cfca | 988 | pcb->ttl = UDP_TTL; |
DieterGraef | 0:d26c1b55cfca | 989 | } |
DieterGraef | 0:d26c1b55cfca | 990 | return pcb; |
DieterGraef | 0:d26c1b55cfca | 991 | } |
DieterGraef | 0:d26c1b55cfca | 992 | |
DieterGraef | 0:d26c1b55cfca | 993 | #if UDP_DEBUG |
DieterGraef | 0:d26c1b55cfca | 994 | /** |
DieterGraef | 0:d26c1b55cfca | 995 | * Print UDP header information for debug purposes. |
DieterGraef | 0:d26c1b55cfca | 996 | * |
DieterGraef | 0:d26c1b55cfca | 997 | * @param udphdr pointer to the udp header in memory. |
DieterGraef | 0:d26c1b55cfca | 998 | */ |
DieterGraef | 0:d26c1b55cfca | 999 | void |
DieterGraef | 0:d26c1b55cfca | 1000 | udp_debug_print(struct udp_hdr *udphdr) |
DieterGraef | 0:d26c1b55cfca | 1001 | { |
DieterGraef | 0:d26c1b55cfca | 1002 | LWIP_DEBUGF(UDP_DEBUG, ("UDP header:\n")); |
DieterGraef | 0:d26c1b55cfca | 1003 | LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); |
DieterGraef | 0:d26c1b55cfca | 1004 | LWIP_DEBUGF(UDP_DEBUG, ("| %5"U16_F" | %5"U16_F" | (src port, dest port)\n", |
DieterGraef | 0:d26c1b55cfca | 1005 | ntohs(udphdr->src), ntohs(udphdr->dest))); |
DieterGraef | 0:d26c1b55cfca | 1006 | LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); |
DieterGraef | 0:d26c1b55cfca | 1007 | LWIP_DEBUGF(UDP_DEBUG, ("| %5"U16_F" | 0x%04"X16_F" | (len, chksum)\n", |
DieterGraef | 0:d26c1b55cfca | 1008 | ntohs(udphdr->len), ntohs(udphdr->chksum))); |
DieterGraef | 0:d26c1b55cfca | 1009 | LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n")); |
DieterGraef | 0:d26c1b55cfca | 1010 | } |
DieterGraef | 0:d26c1b55cfca | 1011 | #endif /* UDP_DEBUG */ |
DieterGraef | 0:d26c1b55cfca | 1012 | |
DieterGraef | 0:d26c1b55cfca | 1013 | #endif /* LWIP_UDP */ |