libmemif: remove old examples

Type: refactor

Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
Change-Id: I2331f6fb43ca533afb32f7d448adda27b19689ac

1 files changed, 0 insertions, 524 deletions

diff --git a/extras/libmemif/examples/icmp_responder/icmp_proto.c b/extras/libmemif/examples/icmp_responder/icmp_proto.c
deleted file mode 100644
index 785aebd5567..00000000000
--- a/extras/libmemif/examples/icmp_responder/icmp_proto.c
+++ /dev/null
@@ -1,524 +0,0 @@
-/*
- *------------------------------------------------------------------
- * Copyright (c) 2017 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *------------------------------------------------------------------
- */
-
-#include <stdint.h>
-#include <net/if.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/uio.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-#include <inttypes.h>
-#include <string.h>
-#include <stdio.h>
-#include <netdb.h>
-#include <linux/ip.h>
-#include <linux/icmp.h>
-#include <arpa/inet.h>
-#include <stdlib.h>
-#include <netinet/if_ether.h>
-#include <net/if_arp.h>
-#include <asm/byteorder.h>
-#include <byteswap.h>
-#include <assert.h>
-
-#include <icmp_proto.h>
-
-static uint16_t
-cksum (void *addr, ssize_t len)
-{
-  char *data = (char *) addr;
-
-  uint32_t acc = 0xffff;
-
-  ssize_t i;
-  for (i = 0; (i + 1) < len; i += 2)
-    {
-      uint16_t word;
-      memcpy (&word, data + i, 2);
-      acc += ntohs (word);
-      if (acc > 0xffff)
-	acc -= 0xffff;
-    }
-
-  if (len & 1)
-    {
-      uint16_t word = 0;
-      memcpy (&word, data + len - 1, 1);
-      acc += ntohs (word);
-      if (acc > 0xffff)
-	acc -= 0xffff;
-    }
-  return htons (~acc);
-}
-
-int
-print_packet (void *pck)
-{
-  if (pck == NULL)
-    {
-      printf ("ICMP_PROTO: no data\n");
-      return -1;
-    }
-  struct iphdr *ip;
-  struct icmphdr *icmp;
-  ip = (struct iphdr *) pck;
-  icmp = (struct icmphdr *) (pck + sizeof (struct iphdr));
-  printf ("received packet:\n");
-  printf ("\tiphdr:\n");
-  printf ("\t\tihl: %u\n\t\tversion: %u\n\t\tlen: %u\n\t\tid: %u\n",
-	  ip->ihl, ip->version, __bswap_16 (ip->tot_len), ip->id);
-  printf ("\t\tprotocol: %u\n", ip->protocol);
-
-  printf ("\t\tsaddr: ");
-  int i;
-  for (i = 0; i < 4; i++)
-    {
-      printf ("%u.", ((uint8_t *) & ip->saddr)[i]);
-    }
-  printf ("\n");
-
-  printf ("\t\tdaddr: ");
-  for (i = 0; i < 4; i++)
-    {
-      printf ("%u.", ((uint8_t *) & ip->daddr)[i]);
-    }
-  printf ("\n");
-  printf ("\ticmphdr:\n");
-  printf ("\t\ttype: %s\n",
-	  (icmp->type == ICMP_ECHO) ? "ICMP_ECHO" : "ICMP_ECHOREPLY");
-
-  return 0;
-}
-
-static ssize_t
-resolve_arp (void *arp)
-{
-  struct arphdr *resp = (struct arphdr *) arp;
-
-  resp->ar_hrd = __bswap_16 (ARPHRD_ETHER);
-
-  resp->ar_pro = __bswap_16 (0x0800);
-
-  resp->ar_hln = 6;
-  resp->ar_pln = 4;
-
-  resp->ar_op = __bswap_16 (ARPOP_REPLY);
-
-  return sizeof (struct arphdr);
-}
-
-static ssize_t
-resolve_eth_arp (struct ether_arp *eth_arp, void *eth_arp_resp,
-		 uint8_t ip_addr[4])
-{
-  struct ether_arp *resp = (struct ether_arp *) eth_arp_resp;
-
-  resolve_arp (&resp->ea_hdr);
-
-  memcpy (resp->arp_tha, eth_arp->arp_sha, 6);
-  memcpy (resp->arp_tpa, eth_arp->arp_spa, 4);
-
-  memcpy (resp->arp_sha,
-	  (((struct ether_header *) (eth_arp_resp -
-				     sizeof (struct
-					     ether_header)))->ether_shost),
-	  6);
-
-  memcpy (resp->arp_spa, ip_addr, 4);
-
-  return sizeof (struct ether_arp);
-}
-
-static ssize_t
-resolve_eth (struct ether_header *eth, void *eth_resp)
-{
-  struct ether_header *resp = (struct ether_header *) eth_resp;
-  memcpy (resp->ether_dhost, eth->ether_shost, 6);
-
-  uint8_t hw_addr[6];
-  int i;
-  for (i = 0; i < 6; i++)
-    {
-      hw_addr[i] = 'a';
-    }
-  memcpy (resp->ether_shost, hw_addr, 6);
-
-  resp->ether_type = eth->ether_type;
-
-  return sizeof (struct ether_header);
-}
-
-static ssize_t
-resolve_ip (struct iphdr *ip, void *ip_resp, uint8_t ip_addr[4])
-{
-  struct iphdr *resp = (struct iphdr *) ip_resp;
-  resp->ihl = 5;
-  resp->version = 4;
-  resp->tos = 0;
-  /*len updated later */
-  resp->tot_len = 0x0000;
-  resp->id = 0;
-  resp->frag_off = 0;
-  resp->ttl = 0x40;
-  resp->protocol = 1;
-  ((uint8_t *) & resp->saddr)[0] = ip_addr[0];
-  ((uint8_t *) & resp->saddr)[1] = ip_addr[1];
-  ((uint8_t *) & resp->saddr)[2] = ip_addr[2];
-  ((uint8_t *) & resp->saddr)[3] = ip_addr[3];
-  resp->daddr = ip->saddr;
-
-  /* resp->check =  cksum (resp, sizeof (struct iphdr)); */
-
-  return sizeof (struct iphdr);
-}
-
-static ssize_t
-resolve_icmp (struct icmphdr *icmp, void *icmp_resp)
-{
-  struct icmphdr *resp = (struct icmphdr *) icmp_resp;
-  resp->type = 0x00;
-  resp->code = 0;
-  resp->un.echo.id = icmp->un.echo.id;
-  resp->un.echo.sequence = icmp->un.echo.sequence;
-
-  /*resp->checksum = cksum (resp, sizeof (struct icmphdr)); */
-
-  return sizeof (struct icmphdr);
-}
-
-int
-resolve_packet (void *in_pck, ssize_t in_size,
-		void *out_pck, uint32_t * out_size, uint8_t ip_addr[4])
-{
-  struct ether_header *eh;
-  struct ether_arp *eah;
-  struct iphdr *ip, *ip_out;
-  struct icmphdr *icmp;
-  *out_size = 0;
-
-  if ((in_pck == NULL) || (out_pck == NULL))
-    return -1;
-
-  eh = (struct ether_header *) in_pck;
-  *out_size = resolve_eth (eh, out_pck);
-
-  if (eh->ether_type == 0x0608)
-    {
-      eah = (struct ether_arp *) (in_pck + *out_size);
-      *out_size += resolve_eth_arp (eah, out_pck + *out_size, ip_addr);
-
-    }
-  else if (eh->ether_type == 0x0008)
-    {
-#ifdef ICMP_DBG
-      print_packet (in_pck + *out_size);
-#endif
-      ip = (struct iphdr *) (in_pck + *out_size);
-      ip_out = (struct iphdr *) (out_pck + *out_size);
-      *out_size += resolve_ip (ip, out_pck + *out_size, ip_addr);
-      if (ip->protocol == 1)
-	{
-	  icmp = (struct icmphdr *) (in_pck + *out_size);
-	  *out_size += resolve_icmp (icmp, out_pck + *out_size);
-	  ((struct icmphdr *) (out_pck + *out_size -
-			       sizeof (struct icmphdr)))->checksum =
-	    cksum (out_pck + *out_size - sizeof (struct icmphdr),
-		   sizeof (struct icmphdr));
-	  /* payload */
-	  memcpy (out_pck + *out_size, in_pck + *out_size,
-		  in_size - *out_size);
-	  *out_size = in_size;
-	  ip_out->tot_len =
-	    __bswap_16 (*out_size - sizeof (struct ether_header));
-	  ip_out->check = cksum (ip_out, sizeof (struct iphdr));
-	}
-    }
-  return 0;
-}
-
-static ssize_t
-generate_eth (struct ether_header *eh, uint8_t hw_daddr[6])
-{
-  uint8_t hw_addr[6];
-  int i;
-  for (i = 0; i < 6; i++)
-    {
-      hw_addr[i] = 'a';
-    }
-  memcpy (eh->ether_shost, hw_addr, 6);
-  memcpy (eh->ether_dhost, hw_daddr, 6);
-
-  eh->ether_type = 0x0008;
-
-  return sizeof (struct ether_header);
-}
-
-static ssize_t
-generate_ip (struct iphdr *ip, uint8_t saddr[4], uint8_t daddr[4])
-{
-  ip->ihl = 5;
-  ip->version = 4;
-  ip->tos = 0;
-  /*len updated later */
-  ip->tot_len = 0x5400;
-  ip->id = 0;
-  ip->frag_off = 0;
-  ip->ttl = 0x40;
-  ip->protocol = 1;
-  /* saddr */
-  ((uint8_t *) & ip->saddr)[0] = saddr[0];
-  ((uint8_t *) & ip->saddr)[1] = saddr[1];
-  ((uint8_t *) & ip->saddr)[2] = saddr[2];
-  ((uint8_t *) & ip->saddr)[3] = saddr[3];
-  /* daddr */
-  ((uint8_t *) & ip->daddr)[0] = daddr[0];
-  ((uint8_t *) & ip->daddr)[1] = daddr[1];
-  ((uint8_t *) & ip->daddr)[2] = daddr[2];
-  ((uint8_t *) & ip->daddr)[3] = daddr[3];
-
-  ip->check = cksum (ip, sizeof (struct iphdr));
-
-  return sizeof (struct iphdr);
-}
-
-static ssize_t
-generate_icmp (struct icmphdr *icmp, uint32_t seq)
-{
-  icmp->type = ICMP_ECHO;
-  icmp->code = 0;
-  icmp->un.echo.id = 0;
-  icmp->un.echo.sequence = seq;
-
-  return sizeof (struct icmphdr);
-}
-
-int
-generate_packet (void *pck, uint32_t * size, uint8_t saddr[4],
-		 uint8_t daddr[4], uint8_t hw_daddr[6], uint32_t seq)
-{
-  struct ether_header *eh;
-  struct iphdr *ip;
-  struct icmphdr *icmp;
-
-  *size = 0;
-
-  eh = (struct ether_header *) pck;
-  *size += generate_eth (eh, hw_daddr);
-
-  ip = (struct iphdr *) (pck + *size);
-  *size += generate_ip (ip, saddr, daddr);
-
-  icmp = (struct icmphdr *) (pck + *size);
-  *size += generate_icmp (icmp, seq);
-
-  ((struct icmphdr *) (pck + *size - sizeof (struct icmphdr)))->checksum =
-    cksum (pck + *size - sizeof (struct icmphdr), sizeof (struct icmphdr));
-
-  ip->tot_len = __bswap_16 (*size - sizeof (struct ether_header));
-  ip->check = 0;
-  ip->check = cksum (ip, sizeof (struct iphdr));
-
-  return 0;
-}
-
-int
-generate_packet2 (void *pck, uint32_t * size, uint8_t saddr[4],
-		  uint8_t daddr[4], uint8_t hw_daddr[6], uint32_t seq,
-		  icmpr_flow_mode_t mode)
-{
-  struct ether_header *eh;
-  struct iphdr *ip;
-  struct icmphdr *icmp;
-
-  *size = 0;
-
-  if (mode == ICMPR_FLOW_MODE_ETH)
-    {
-      eh = (struct ether_header *) pck;
-      *size += generate_eth (eh, hw_daddr);
-    }
-
-  ip = (struct iphdr *) (pck + *size);
-  *size += generate_ip (ip, saddr, daddr);
-
-  icmp = (struct icmphdr *) (pck + *size);
-  *size += generate_icmp (icmp, seq);
-
-  ((struct icmphdr *) (pck + *size - sizeof (struct icmphdr)))->checksum =
-    cksum (pck + *size - sizeof (struct icmphdr), sizeof (struct icmphdr));
-
-  ip->tot_len = __bswap_16 (*size - sizeof (struct ether_header));
-  ip->check = 0;
-  ip->check = cksum (ip, sizeof (struct iphdr));
-
-  return 0;
-}
-
-#define GET_HEADER(out,hdr,src,off) do {	\
-					out = (hdr*)(src + off); \
-					off += sizeof (hdr); \
-				} while (0)
-
-int
-resolve_packet2 (void *pck, uint32_t * size, uint8_t ip_addr[4])
-{
-  struct ether_header *eh;
-  struct ether_arp *eah;
-  struct iphdr *ip;
-  struct icmphdr *icmp;
-  uint32_t offset = 0;
-
-  if (pck == NULL)
-    return 0;
-
-  GET_HEADER (eh, struct ether_header, pck, offset);
-
-  memcpy (eh->ether_dhost, eh->ether_shost, 6);
-  memcpy (eh->ether_shost, "aaaaaa", 6);
-
-  if (eh->ether_type == 0x0608)
-    {
-      GET_HEADER (eah, struct ether_arp, pck, offset);
-      struct arphdr *arp = &eah->ea_hdr;
-
-      arp->ar_hrd = __bswap_16 (ARPHRD_ETHER);
-      arp->ar_pro = __bswap_16 (0x0800);
-
-      arp->ar_hln = 6;
-      arp->ar_pln = 4;
-
-      arp->ar_op = __bswap_16 (ARPOP_REPLY);
-
-      memcpy (eah->arp_tha, eah->arp_sha, 6);
-      memcpy (eah->arp_tpa, eah->arp_spa, 4);
-
-      memcpy (eah->arp_sha, eh->ether_shost, 6);
-      memcpy (eah->arp_spa, ip_addr, 4);
-    }
-
-  else if (eh->ether_type == 0x0008)
-    {
-      GET_HEADER (ip, struct iphdr, pck, offset);
-
-      if (ip->protocol == 1)
-	{
-	  ip->ihl = 5;
-	  ip->version = 4;
-	  ip->tos = 0;
-	  ip->tot_len = 0x0000;
-	  ip->id = 0;
-	  ip->frag_off = 0;
-	  ip->ttl = 0x40;
-	  ip->protocol = 1;
-	  ip->check = 0x0000;
-	  ip->daddr = ip->saddr;
-	  ((uint8_t *) & ip->saddr)[0] = ip_addr[0];
-	  ((uint8_t *) & ip->saddr)[1] = ip_addr[1];
-	  ((uint8_t *) & ip->saddr)[2] = ip_addr[2];
-	  ((uint8_t *) & ip->saddr)[3] = ip_addr[3];
-
-	  GET_HEADER (icmp, struct icmphdr, pck, offset);
-
-	  icmp->type = 0x00;
-	  icmp->code = 0;
-	  icmp->checksum = cksum (icmp, sizeof (struct icmphdr));
-
-	  /* rest is payload */
-	  offset = *size;
-
-	  ip->tot_len = __bswap_16 (offset - sizeof (struct ether_header));
-	  ip->check = cksum (ip, sizeof (struct iphdr));
-	}
-    }
-
-  assert (offset == *size && "unsupported protocol");
-  return 0;
-}
-
-
-int
-resolve_packet3 (void **pck_, uint32_t * size, uint8_t ip_addr[4])
-{
-  struct ether_header *eh;
-  struct iphdr *ip;
-  struct icmphdr *icmp;
-  int32_t offset = 0;
-  uint16_t encap_size = sizeof (struct ether_header);
-  void *pck = *pck_;
-
-  if (pck == NULL)
-    return 0;
-
-  *pck_ -= encap_size;
-  offset -= encap_size;
-
-  GET_HEADER (eh, struct ether_header, pck, offset);
-
-  uint8_t hw_daddr[6];
-  memset (hw_daddr, 0, sizeof (uint8_t) * 6);
-
-  generate_eth (eh, hw_daddr);
-
-  if (eh->ether_type == 0x0008)
-    {
-      GET_HEADER (ip, struct iphdr, pck, offset);
-
-      if (ip->protocol == 1)
-	{
-	  ip->ihl = 5;
-	  ip->version = 4;
-	  ip->tos = 0;
-	  ip->tot_len = 0x0000;
-	  ip->id = 0;
-	  ip->frag_off = 0;
-	  ip->ttl = 0x40;
-	  ip->protocol = 1;
-	  ip->check = 0x0000;
-	  ip->daddr = ip->saddr;
-	  ((uint8_t *) & ip->saddr)[0] = ip_addr[0];
-	  ((uint8_t *) & ip->saddr)[1] = ip_addr[1];
-	  ((uint8_t *) & ip->saddr)[2] = ip_addr[2];
-	  ((uint8_t *) & ip->saddr)[3] = ip_addr[3];
-
-	  GET_HEADER (icmp, struct icmphdr, pck, offset);
-
-	  icmp->type = 0x00;
-	  icmp->code = 0;
-	  icmp->checksum = cksum (icmp, sizeof (struct icmphdr));
-
-	  /* rest is payload */
-	  offset = *size;
-
-	  ip->tot_len = __bswap_16 (offset - sizeof (struct ether_header));
-	  ip->check = cksum (ip, sizeof (struct iphdr));
-	}
-    }
-
-  offset += encap_size;
-
-  assert (offset != *size &&
-	  "new packet length must be increased by encap size");
-
-  /* overwrite packet size */
-  *size = offset;
-
-  return 0;
-}