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_ipfilter.c@3:b4047e8a0123, 2013-05-24 (annotated)

Committer:
daniele
Date:
Fri May 24 15:25:25 2013 +0000
Revision:
3:b4047e8a0123
Child:
51:ab4529a384a6
Updated from main repo + fixed Mutexes;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
daniele 3:b4047e8a0123 1 /*********************************************************************
daniele 3:b4047e8a0123 2 PicoTCP. Copyright (c) 2012 TASS Belgium NV. Some rights reserved.
daniele 3:b4047e8a0123 3 See LICENSE and COPYING for usage.
daniele 3:b4047e8a0123 4
daniele 3:b4047e8a0123 5 Authors: Simon Maes
daniele 3:b4047e8a0123 6 *********************************************************************/
daniele 3:b4047e8a0123 7
daniele 3:b4047e8a0123 8 #include "pico_ipv4.h"
daniele 3:b4047e8a0123 9 #include "pico_config.h"
daniele 3:b4047e8a0123 10 #include "pico_icmp4.h"
daniele 3:b4047e8a0123 11 #include "pico_stack.h"
daniele 3:b4047e8a0123 12 #include "pico_eth.h"
daniele 3:b4047e8a0123 13 #include "pico_socket.h"
daniele 3:b4047e8a0123 14 #include "pico_device.h"
daniele 3:b4047e8a0123 15 #include "pico_ipfilter.h"
daniele 3:b4047e8a0123 16 #include "pico_tcp.h"
daniele 3:b4047e8a0123 17 #include "pico_udp.h"
daniele 3:b4047e8a0123 18
daniele 3:b4047e8a0123 19
daniele 3:b4047e8a0123 20 //#define ipf_dbg dbg
daniele 3:b4047e8a0123 21 #define ipf_dbg(...) do{}while(0)
daniele 3:b4047e8a0123 22
daniele 3:b4047e8a0123 23 struct filter_node;
daniele 3:b4047e8a0123 24 typedef int (*func_pntr)(struct filter_node *filter, struct pico_frame *f);
daniele 3:b4047e8a0123 25
daniele 3:b4047e8a0123 26 struct filter_node {
daniele 3:b4047e8a0123 27 struct pico_device *fdev;
daniele 3:b4047e8a0123 28 struct filter_node *next_filter;
daniele 3:b4047e8a0123 29 uint32_t out_addr;
daniele 3:b4047e8a0123 30 uint32_t out_addr_netmask;
daniele 3:b4047e8a0123 31 uint32_t in_addr;
daniele 3:b4047e8a0123 32 uint32_t in_addr_netmask;
daniele 3:b4047e8a0123 33 uint16_t out_port;
daniele 3:b4047e8a0123 34 uint16_t in_port;
daniele 3:b4047e8a0123 35 uint8_t proto;
daniele 3:b4047e8a0123 36 int8_t priority;
daniele 3:b4047e8a0123 37 uint8_t tos;
daniele 3:b4047e8a0123 38 uint8_t filter_id;
daniele 3:b4047e8a0123 39 func_pntr function_ptr;
daniele 3:b4047e8a0123 40 };
daniele 3:b4047e8a0123 41
daniele 3:b4047e8a0123 42 static struct filter_node *head = NULL;
daniele 3:b4047e8a0123 43 static struct filter_node *tail = NULL;
daniele 3:b4047e8a0123 44
daniele 3:b4047e8a0123 45 /*======================== FUNCTION PNTRS ==========================*/
daniele 3:b4047e8a0123 46
daniele 3:b4047e8a0123 47 static int fp_accept(struct filter_node *filter, struct pico_frame *f) {return 0;}
daniele 3:b4047e8a0123 48
daniele 3:b4047e8a0123 49 static int fp_priority(struct filter_node *filter, struct pico_frame *f) {
daniele 3:b4047e8a0123 50
daniele 3:b4047e8a0123 51 //TODO do priority-stuff
daniele 3:b4047e8a0123 52 return 0;
daniele 3:b4047e8a0123 53 }
daniele 3:b4047e8a0123 54
daniele 3:b4047e8a0123 55 static int fp_reject(struct filter_node *filter, struct pico_frame *f) {
daniele 3:b4047e8a0123 56 // TODO check first if sender is pico itself or not
daniele 3:b4047e8a0123 57 ipf_dbg("ipfilter> #reject\n");
daniele 3:b4047e8a0123 58 pico_icmp4_packet_filtered(f);
daniele 3:b4047e8a0123 59 pico_frame_discard(f);
daniele 3:b4047e8a0123 60 return 1;
daniele 3:b4047e8a0123 61 }
daniele 3:b4047e8a0123 62
daniele 3:b4047e8a0123 63 static int fp_drop(struct filter_node *filter, struct pico_frame *f) {
daniele 3:b4047e8a0123 64
daniele 3:b4047e8a0123 65 ipf_dbg("ipfilter> # drop\n");
daniele 3:b4047e8a0123 66 pico_frame_discard(f);
daniele 3:b4047e8a0123 67 return 1;
daniele 3:b4047e8a0123 68 }
daniele 3:b4047e8a0123 69
daniele 3:b4047e8a0123 70 /*============================ API CALLS ============================*/
daniele 3:b4047e8a0123 71 int pico_ipv4_filter_add(struct pico_device *dev, uint8_t proto, struct pico_ip4 *out_addr, struct pico_ip4 *out_addr_netmask, struct pico_ip4 *in_addr, struct pico_ip4 *in_addr_netmask, uint16_t out_port, uint16_t in_port, int8_t priority, uint8_t tos, enum filter_action action)
daniele 3:b4047e8a0123 72 {
daniele 3:b4047e8a0123 73 static uint8_t filter_id = 0;
daniele 3:b4047e8a0123 74 struct filter_node *new_filter;
daniele 3:b4047e8a0123 75
daniele 3:b4047e8a0123 76 if ( !(dev != NULL || proto != 0 || (out_addr != NULL && out_addr->addr != 0U) || (out_addr_netmask != NULL && out_addr_netmask->addr != 0U)|| (in_addr != NULL && in_addr->addr != 0U) || (in_addr_netmask != NULL && in_addr_netmask->addr != 0U)|| out_port != 0 || in_port !=0 || tos != 0 )) {
daniele 3:b4047e8a0123 77 pico_err = PICO_ERR_EINVAL;
daniele 3:b4047e8a0123 78 return -1;
daniele 3:b4047e8a0123 79 }
daniele 3:b4047e8a0123 80 if ( priority > 10 || priority < -10) {
daniele 3:b4047e8a0123 81 pico_err = PICO_ERR_EINVAL;
daniele 3:b4047e8a0123 82 return -1;
daniele 3:b4047e8a0123 83 }
daniele 3:b4047e8a0123 84 if (action > 3 || action < 0) {
daniele 3:b4047e8a0123 85 pico_err = PICO_ERR_EINVAL;
daniele 3:b4047e8a0123 86 return -1;
daniele 3:b4047e8a0123 87 }
daniele 3:b4047e8a0123 88 ipf_dbg("ipfilter> # adding filter\n");
daniele 3:b4047e8a0123 89
daniele 3:b4047e8a0123 90 new_filter = pico_zalloc(sizeof(struct filter_node));
daniele 3:b4047e8a0123 91 if (!head) {
daniele 3:b4047e8a0123 92 head = tail = new_filter;
daniele 3:b4047e8a0123 93 } else {
daniele 3:b4047e8a0123 94 tail->next_filter = new_filter;
daniele 3:b4047e8a0123 95 tail = new_filter;
daniele 3:b4047e8a0123 96 }
daniele 3:b4047e8a0123 97
daniele 3:b4047e8a0123 98 new_filter->fdev = dev;
daniele 3:b4047e8a0123 99 new_filter->proto = proto;
daniele 3:b4047e8a0123 100 if (out_addr != NULL)
daniele 3:b4047e8a0123 101 new_filter->out_addr = out_addr->addr;
daniele 3:b4047e8a0123 102 else
daniele 3:b4047e8a0123 103 new_filter->out_addr = 0U;
daniele 3:b4047e8a0123 104
daniele 3:b4047e8a0123 105 if (out_addr_netmask != NULL)
daniele 3:b4047e8a0123 106 new_filter->out_addr_netmask = out_addr_netmask->addr;
daniele 3:b4047e8a0123 107 else
daniele 3:b4047e8a0123 108 new_filter->out_addr_netmask = 0U;
daniele 3:b4047e8a0123 109
daniele 3:b4047e8a0123 110 if (in_addr != NULL)
daniele 3:b4047e8a0123 111 new_filter->in_addr = in_addr->addr;
daniele 3:b4047e8a0123 112 else
daniele 3:b4047e8a0123 113 new_filter->in_addr = 0U;
daniele 3:b4047e8a0123 114
daniele 3:b4047e8a0123 115 if (in_addr_netmask != NULL)
daniele 3:b4047e8a0123 116 new_filter->in_addr_netmask = in_addr_netmask->addr;
daniele 3:b4047e8a0123 117 else
daniele 3:b4047e8a0123 118 new_filter->in_addr_netmask = 0U;
daniele 3:b4047e8a0123 119
daniele 3:b4047e8a0123 120 new_filter->out_port = out_port;
daniele 3:b4047e8a0123 121 new_filter->in_port = in_port;
daniele 3:b4047e8a0123 122 new_filter->priority = priority;
daniele 3:b4047e8a0123 123 new_filter->tos = tos;
daniele 3:b4047e8a0123 124 new_filter->filter_id = filter_id++;
daniele 3:b4047e8a0123 125
daniele 3:b4047e8a0123 126 /*Define filterType_functionPointer here instead of in ipfilter-function, to prevent running multiple times through switch*/
daniele 3:b4047e8a0123 127 switch (action) {
daniele 3:b4047e8a0123 128 case FILTER_ACCEPT:
daniele 3:b4047e8a0123 129 new_filter->function_ptr = fp_accept;
daniele 3:b4047e8a0123 130 break;
daniele 3:b4047e8a0123 131 case FILTER_PRIORITY:
daniele 3:b4047e8a0123 132 new_filter->function_ptr = fp_priority;
daniele 3:b4047e8a0123 133 break;
daniele 3:b4047e8a0123 134 case FILTER_REJECT:
daniele 3:b4047e8a0123 135 new_filter->function_ptr = fp_reject;
daniele 3:b4047e8a0123 136 break;
daniele 3:b4047e8a0123 137 case FILTER_DROP:
daniele 3:b4047e8a0123 138 new_filter->function_ptr = fp_drop;
daniele 3:b4047e8a0123 139 break;
daniele 3:b4047e8a0123 140 default:
daniele 3:b4047e8a0123 141 ipf_dbg("ipfilter> #unknown filter action\n");
daniele 3:b4047e8a0123 142 break;
daniele 3:b4047e8a0123 143 }
daniele 3:b4047e8a0123 144 return new_filter->filter_id;
daniele 3:b4047e8a0123 145 }
daniele 3:b4047e8a0123 146
daniele 3:b4047e8a0123 147 int pico_ipv4_filter_del(uint8_t filter_id)
daniele 3:b4047e8a0123 148 {
daniele 3:b4047e8a0123 149 struct filter_node *work;
daniele 3:b4047e8a0123 150 struct filter_node *prev;
daniele 3:b4047e8a0123 151
daniele 3:b4047e8a0123 152 if (!tail || !head) {
daniele 3:b4047e8a0123 153 pico_err = PICO_ERR_EPERM;
daniele 3:b4047e8a0123 154 return -1;
daniele 3:b4047e8a0123 155 }
daniele 3:b4047e8a0123 156
daniele 3:b4047e8a0123 157 work = head;
daniele 3:b4047e8a0123 158 if (work->filter_id == filter_id) {
daniele 3:b4047e8a0123 159 /*delete filter_node from linked list*/
daniele 3:b4047e8a0123 160 head = work->next_filter;
daniele 3:b4047e8a0123 161 pico_free(work);
daniele 3:b4047e8a0123 162 return 0;
daniele 3:b4047e8a0123 163 }
daniele 3:b4047e8a0123 164 prev = work;
daniele 3:b4047e8a0123 165 work = work->next_filter;
daniele 3:b4047e8a0123 166
daniele 3:b4047e8a0123 167 while (1) {
daniele 3:b4047e8a0123 168 if (work->filter_id == filter_id) {
daniele 3:b4047e8a0123 169 if (work != tail) {
daniele 3:b4047e8a0123 170 /*delete filter_node from linked list*/
daniele 3:b4047e8a0123 171 prev->next_filter = work->next_filter;
daniele 3:b4047e8a0123 172 pico_free(work);
daniele 3:b4047e8a0123 173 return 0;
daniele 3:b4047e8a0123 174 } else {
daniele 3:b4047e8a0123 175 prev->next_filter = NULL;
daniele 3:b4047e8a0123 176 pico_free(work);
daniele 3:b4047e8a0123 177 return 0;
daniele 3:b4047e8a0123 178 }
daniele 3:b4047e8a0123 179 } else {
daniele 3:b4047e8a0123 180 /*check next filter_node*/
daniele 3:b4047e8a0123 181 prev = work;
daniele 3:b4047e8a0123 182 work = work->next_filter;
daniele 3:b4047e8a0123 183 if (work == tail) {
daniele 3:b4047e8a0123 184 pico_err = PICO_ERR_EINVAL;
daniele 3:b4047e8a0123 185 return -1;
daniele 3:b4047e8a0123 186 }
daniele 3:b4047e8a0123 187 }
daniele 3:b4047e8a0123 188 }
daniele 3:b4047e8a0123 189 }
daniele 3:b4047e8a0123 190
daniele 3:b4047e8a0123 191 /*================================== CORE FILTER FUNCTIONS ==================================*/
daniele 3:b4047e8a0123 192 int match_filter(struct filter_node *filter, struct pico_frame *f)
daniele 3:b4047e8a0123 193 {
daniele 3:b4047e8a0123 194 struct filter_node temp;
daniele 3:b4047e8a0123 195 struct pico_ipv4_hdr *ipv4_hdr = (struct pico_ipv4_hdr *) f->net_hdr;
daniele 3:b4047e8a0123 196 struct pico_tcp_hdr *tcp_hdr;
daniele 3:b4047e8a0123 197 struct pico_udp_hdr *udp_hdr;
daniele 3:b4047e8a0123 198
daniele 3:b4047e8a0123 199 if (!filter|| !f) {
daniele 3:b4047e8a0123 200 ipf_dbg("ipfilter> ## nullpointer in match filter \n");
daniele 3:b4047e8a0123 201 return -1;
daniele 3:b4047e8a0123 202 }
daniele 3:b4047e8a0123 203
daniele 3:b4047e8a0123 204 temp.fdev = f->dev;
daniele 3:b4047e8a0123 205 temp.out_addr = ipv4_hdr->dst.addr;
daniele 3:b4047e8a0123 206 temp.in_addr = ipv4_hdr->src.addr;
daniele 3:b4047e8a0123 207 if (ipv4_hdr->proto == PICO_PROTO_TCP ) {
daniele 3:b4047e8a0123 208 tcp_hdr = (struct pico_tcp_hdr *) f->transport_hdr;
daniele 3:b4047e8a0123 209 temp.out_port = short_be(tcp_hdr->trans.dport);
daniele 3:b4047e8a0123 210 temp.in_port = short_be(tcp_hdr->trans.sport);
daniele 3:b4047e8a0123 211 }else if (ipv4_hdr->proto == PICO_PROTO_UDP ) {
daniele 3:b4047e8a0123 212 udp_hdr = (struct pico_udp_hdr *) f->transport_hdr;
daniele 3:b4047e8a0123 213 temp.out_port = short_be(udp_hdr->trans.dport);
daniele 3:b4047e8a0123 214 temp.in_port = short_be(udp_hdr->trans.sport);
daniele 3:b4047e8a0123 215 } else {
daniele 3:b4047e8a0123 216 temp.out_port = temp.in_port = 0;
daniele 3:b4047e8a0123 217 }
daniele 3:b4047e8a0123 218 temp.proto = ipv4_hdr->proto;
daniele 3:b4047e8a0123 219 temp.priority = f->priority;
daniele 3:b4047e8a0123 220 temp.tos = ipv4_hdr->tos;
daniele 3:b4047e8a0123 221
daniele 3:b4047e8a0123 222
daniele 3:b4047e8a0123 223
daniele 3:b4047e8a0123 224 if ( ((filter->fdev == NULL || filter->fdev == temp.fdev) && \
daniele 3:b4047e8a0123 225 (filter->in_addr == 0 || ((filter->in_addr_netmask == 0) ? (filter->in_addr == temp.in_addr) : 1)) &&\
daniele 3:b4047e8a0123 226 (filter->in_port == 0 || filter->in_port == temp.in_port) &&\
daniele 3:b4047e8a0123 227 (filter->out_addr == 0 || ((filter->out_addr_netmask == 0) ? (filter->out_addr == temp.out_addr) : 1)) && \
daniele 3:b4047e8a0123 228 (filter->out_port == 0 || filter->out_port == temp.out_port) && \
daniele 3:b4047e8a0123 229 (filter->proto == 0 || filter->proto == temp.proto ) &&\
daniele 3:b4047e8a0123 230 (filter->priority == 0 || filter->priority == temp.priority ) &&\
daniele 3:b4047e8a0123 231 (filter->tos == 0 || filter->tos == temp.tos ) &&\
daniele 3:b4047e8a0123 232 (filter->out_addr_netmask == 0 || ((filter->out_addr & filter->out_addr_netmask) == (temp.out_addr & filter->out_addr_netmask)) ) &&\
daniele 3:b4047e8a0123 233 (filter->in_addr_netmask == 0 || ((filter->in_addr & filter->in_addr_netmask) == (temp.in_addr & filter->in_addr_netmask)) )\
daniele 3:b4047e8a0123 234 ) )
daniele 3:b4047e8a0123 235 return 0;
daniele 3:b4047e8a0123 236
daniele 3:b4047e8a0123 237 //No filter match!
daniele 3:b4047e8a0123 238 ipf_dbg("ipfilter> #no match\n");
daniele 3:b4047e8a0123 239 return 1;
daniele 3:b4047e8a0123 240 }
daniele 3:b4047e8a0123 241
daniele 3:b4047e8a0123 242 int ipfilter(struct pico_frame *f)
daniele 3:b4047e8a0123 243 {
daniele 3:b4047e8a0123 244 struct filter_node *work = head;
daniele 3:b4047e8a0123 245
daniele 3:b4047e8a0123 246 /*return 1 if pico_frame is discarded as result of the filtering, 0 for an incomming packet, -1 for faults*/
daniele 3:b4047e8a0123 247 if (!tail || !head) {
daniele 3:b4047e8a0123 248 return 0;
daniele 3:b4047e8a0123 249 }
daniele 3:b4047e8a0123 250
daniele 3:b4047e8a0123 251 if ( match_filter(work, f) == 0 ) {
daniele 3:b4047e8a0123 252 ipf_dbg("ipfilter> # ipfilter match\n");
daniele 3:b4047e8a0123 253 /*filter match, execute filter!*/
daniele 3:b4047e8a0123 254 return work->function_ptr(work, f);
daniele 3:b4047e8a0123 255 }
daniele 3:b4047e8a0123 256 while (tail != work) {
daniele 3:b4047e8a0123 257 ipf_dbg("ipfilter> next filter..\n");
daniele 3:b4047e8a0123 258 work = work->next_filter;
daniele 3:b4047e8a0123 259 if ( match_filter(work, f) == 0 ) {
daniele 3:b4047e8a0123 260 ipf_dbg("ipfilter> # ipfilter match\n");
daniele 3:b4047e8a0123 261 /*filter match, execute filter!*/
daniele 3:b4047e8a0123 262 return work->function_ptr(work, f);
daniele 3:b4047e8a0123 263 }
daniele 3:b4047e8a0123 264 }
daniele 3:b4047e8a0123 265 return 0;
daniele 3:b4047e8a0123 266 }
daniele 3:b4047e8a0123 267