1 | /*
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2 | * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without modification,
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6 | * are permitted provided that the following conditions are met:
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7 | *
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8 | * 1. Redistributions of source code must retain the above copyright notice,
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9 | * this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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11 | * this list of conditions and the following disclaimer in the documentation
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12 | * and/or other materials provided with the distribution.
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13 | * 3. The name of the author may not be used to endorse or promote products
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14 | * derived from this software without specific prior written permission.
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15 | *
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16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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25 | * OF SUCH DAMAGE.
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26 | *
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27 | * This file is part of the lwIP TCP/IP stack.
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28 | *
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29 | * Author: Erik Ekman <erik@kryo.se>
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30 | *
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31 | */
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32 |
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33 | #include "lwip/init.h"
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34 | #include "lwip/netif.h"
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35 | #include "lwip/dns.h"
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36 | #include "netif/etharp.h"
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37 | #if LWIP_IPV6
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38 | #include "lwip/ethip6.h"
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39 | #include "lwip/nd6.h"
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40 | #endif
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41 |
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42 | #include "lwip/apps/httpd.h"
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43 | #include "lwip/apps/snmp.h"
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44 | #include "lwip/apps/lwiperf.h"
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45 | #include "lwip/apps/mdns.h"
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46 |
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47 | #include <string.h>
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48 | #include <stdio.h>
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49 |
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50 | /* This define enables multi packet processing.
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51 | * For this, the input is interpreted as 2 byte length + data + 2 byte length + data...
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52 | * #define LWIP_FUZZ_MULTI_PACKET
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53 | */
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54 | #ifdef LWIP_FUZZ_MULTI_PACKET
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55 | u8_t pktbuf[20000];
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56 | #else
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57 | u8_t pktbuf[2000];
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58 | #endif
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59 |
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60 | /* no-op send function */
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61 | static err_t lwip_tx_func(struct netif *netif, struct pbuf *p)
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62 | {
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63 | LWIP_UNUSED_ARG(netif);
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64 | LWIP_UNUSED_ARG(p);
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65 | return ERR_OK;
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66 | }
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67 |
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68 | static err_t testif_init(struct netif *netif)
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69 | {
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70 | netif->name[0] = 'f';
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71 | netif->name[1] = 'z';
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72 | netif->output = etharp_output;
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73 | netif->linkoutput = lwip_tx_func;
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74 | netif->mtu = 1500;
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75 | netif->hwaddr_len = 6;
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76 | netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_IGMP;
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77 |
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78 | netif->hwaddr[0] = 0x00;
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79 | netif->hwaddr[1] = 0x23;
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80 | netif->hwaddr[2] = 0xC1;
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81 | netif->hwaddr[3] = 0xDE;
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82 | netif->hwaddr[4] = 0xD0;
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83 | netif->hwaddr[5] = 0x0D;
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84 |
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85 | #if LWIP_IPV6
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86 | netif->output_ip6 = ethip6_output;
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87 | netif->ip6_autoconfig_enabled = 1;
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88 | netif_create_ip6_linklocal_address(netif, 1);
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89 | netif->flags |= NETIF_FLAG_MLD6;
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90 | #endif
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91 |
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92 | return ERR_OK;
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93 | }
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94 |
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95 | static void input_pkt(struct netif *netif, const u8_t *data, size_t len)
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96 | {
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97 | struct pbuf *p, *q;
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98 | err_t err;
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99 |
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100 | LWIP_ASSERT("pkt too big", len <= 0xFFFF);
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101 | p = pbuf_alloc(PBUF_RAW, (u16_t)len, PBUF_POOL);
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102 | LWIP_ASSERT("alloc failed", p);
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103 | for(q = p; q != NULL; q = q->next) {
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104 | MEMCPY(q->payload, data, q->len);
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105 | data += q->len;
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106 | }
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107 | err = netif->input(p, netif);
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108 | if (err != ERR_OK) {
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109 | pbuf_free(p);
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110 | }
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111 | }
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112 |
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113 | static void input_pkts(struct netif *netif, const u8_t *data, size_t len)
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114 | {
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115 | #ifdef LWIP_FUZZ_MULTI_PACKET
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116 | const u16_t max_packet_size = 1514;
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117 | const u8_t *ptr = data;
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118 | size_t rem_len = len;
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119 |
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120 | while (rem_len > sizeof(u16_t)) {
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121 | u16_t frame_len;
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122 | memcpy(&frame_len, ptr, sizeof(u16_t));
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123 | ptr += sizeof(u16_t);
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124 | rem_len -= sizeof(u16_t);
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125 | frame_len = htons(frame_len) & 0x7FF;
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126 | frame_len = LWIP_MIN(frame_len, max_packet_size);
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127 | if (frame_len > rem_len) {
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128 | frame_len = (u16_t)rem_len;
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129 | }
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130 | if (frame_len != 0) {
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131 | input_pkt(netif, ptr, frame_len);
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132 | }
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133 | ptr += frame_len;
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134 | rem_len -= frame_len;
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135 | }
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136 | #else /* LWIP_FUZZ_MULTI_PACKET */
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137 | input_pkt(netif, data, len);
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138 | #endif /* LWIP_FUZZ_MULTI_PACKET */
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139 | }
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140 |
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141 | int main(int argc, char** argv)
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142 | {
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143 | struct netif net_test;
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144 | ip4_addr_t addr;
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145 | ip4_addr_t netmask;
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146 | ip4_addr_t gw;
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147 | size_t len;
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148 |
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149 | lwip_init();
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150 |
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151 | IP4_ADDR(&addr, 172, 30, 115, 84);
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152 | IP4_ADDR(&netmask, 255, 255, 255, 0);
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153 | IP4_ADDR(&gw, 172, 30, 115, 1);
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154 |
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155 | netif_add(&net_test, &addr, &netmask, &gw, &net_test, testif_init, ethernet_input);
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156 | netif_set_up(&net_test);
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157 | netif_set_link_up(&net_test);
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158 |
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159 | #if LWIP_IPV6
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160 | nd6_tmr(); /* tick nd to join multicast groups */
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161 | #endif
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162 | dns_setserver(0, &net_test.gw);
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163 |
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164 | /* initialize apps */
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165 | httpd_init();
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166 | lwiperf_start_tcp_server_default(NULL, NULL);
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167 | mdns_resp_init();
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168 | mdns_resp_add_netif(&net_test, "hostname", 255);
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169 | snmp_init();
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170 |
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171 | if(argc > 1) {
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172 | FILE* f;
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173 | const char* filename;
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174 | printf("reading input from file... ");
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175 | fflush(stdout);
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176 | filename = argv[1];
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177 | LWIP_ASSERT("invalid filename", filename != NULL);
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178 | f = fopen(filename, "rb");
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179 | LWIP_ASSERT("open failed", f != NULL);
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180 | len = fread(pktbuf, 1, sizeof(pktbuf), f);
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181 | fclose(f);
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182 | printf("testing file: \"%s\"...\r\n", filename);
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183 | } else {
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184 | len = fread(pktbuf, 1, sizeof(pktbuf), stdin);
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185 | }
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186 | input_pkts(&net_test, pktbuf, len);
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187 |
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188 | return 0;
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189 | }
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