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authorJakub Grajciar <jgrajcia@cisco.com>2021-01-04 15:01:54 +0100
committerDamjan Marion <dmarion@me.com>2021-09-27 14:35:45 +0000
commit9f99e9a60e31f558f9eb5f8e3762d7a97bde67a8 (patch)
tree3c65462f6e1de3a47b46fbcfeb639d692dc154b0 /extras/libmemif/examples/icmp_responder/icmp_proto.c
parent24681606b9e1f78436846ef3de936829c03b5ca9 (diff)
libmemif: remove old examples
Type: refactor Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com> Change-Id: I2331f6fb43ca533afb32f7d448adda27b19689ac
Diffstat (limited to 'extras/libmemif/examples/icmp_responder/icmp_proto.c')
-rw-r--r--extras/libmemif/examples/icmp_responder/icmp_proto.c524
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;
-}