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Diffstat (limited to 'dump.c')
| -rw-r--r-- | dump.c | 250 |
1 files changed, 0 insertions, 250 deletions
@@ -1,250 +0,0 @@ -/* - * Copyright 2011 Daniel Drown - * - * 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. - * - * dump.c - print various headers for debugging - */ -#include "dump.h" - -#include <arpa/inet.h> -#include <linux/icmp.h> -#include <linux/if_tun.h> -#include <netinet/icmp6.h> -#include <netinet/in.h> -#include <netinet/ip.h> -#include <netinet/ip6.h> -#include <netinet/ip_icmp.h> -#include <netinet/tcp.h> -#include <netinet/udp.h> -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> - -#include "checksum.h" -#include "clatd.h" -#include "debug.h" -#include "logging.h" - -#if CLAT_DEBUG - -/* print ip header */ -void dump_ip(struct iphdr *header) { - u_int16_t frag_flags; - char addrstr[INET6_ADDRSTRLEN]; - - frag_flags = ntohs(header->frag_off); - - printf("IP packet\n"); - printf("header_len = %x\n", header->ihl); - printf("version = %x\n", header->version); - printf("tos = %x\n", header->tos); - printf("tot_len = %x\n", ntohs(header->tot_len)); - printf("id = %x\n", ntohs(header->id)); - printf("frag: "); - if (frag_flags & IP_RF) { - printf("(RF) "); - } - if (frag_flags & IP_DF) { - printf("DF "); - } - if (frag_flags & IP_MF) { - printf("MF "); - } - printf("offset = %x\n", frag_flags & IP_OFFMASK); - printf("ttl = %x\n", header->ttl); - printf("protocol = %x\n", header->protocol); - printf("checksum = %x\n", ntohs(header->check)); - inet_ntop(AF_INET, &header->saddr, addrstr, sizeof(addrstr)); - printf("saddr = %s\n", addrstr); - inet_ntop(AF_INET, &header->daddr, addrstr, sizeof(addrstr)); - printf("daddr = %s\n", addrstr); -} - -/* print ip6 header */ -void dump_ip6(struct ip6_hdr *header) { - char addrstr[INET6_ADDRSTRLEN]; - - printf("ipv6\n"); - printf("version = %x\n", header->ip6_vfc >> 4); - printf("traffic class = %x\n", header->ip6_flow >> 20); - printf("flow label = %x\n", ntohl(header->ip6_flow & 0x000fffff)); - printf("payload len = %x\n", ntohs(header->ip6_plen)); - printf("next header = %x\n", header->ip6_nxt); - printf("hop limit = %x\n", header->ip6_hlim); - - inet_ntop(AF_INET6, &header->ip6_src, addrstr, sizeof(addrstr)); - printf("source = %s\n", addrstr); - - inet_ntop(AF_INET6, &header->ip6_dst, addrstr, sizeof(addrstr)); - printf("dest = %s\n", addrstr); -} - -/* print icmp header */ -void dump_icmp(struct icmphdr *icmp) { - printf("ICMP\n"); - - printf("icmp.type = %x ", icmp->type); - if (icmp->type == ICMP_ECHOREPLY) { - printf("echo reply"); - } else if (icmp->type == ICMP_ECHO) { - printf("echo request"); - } else { - printf("other"); - } - printf("\n"); - printf("icmp.code = %x\n", icmp->code); - printf("icmp.checksum = %x\n", ntohs(icmp->checksum)); - if (icmp->type == ICMP_ECHOREPLY || icmp->type == ICMP_ECHO) { - printf("icmp.un.echo.id = %x\n", ntohs(icmp->un.echo.id)); - printf("icmp.un.echo.sequence = %x\n", ntohs(icmp->un.echo.sequence)); - } -} - -/* print icmp6 header */ -void dump_icmp6(struct icmp6_hdr *icmp6) { - printf("ICMP6\n"); - printf("type = %x", icmp6->icmp6_type); - if (icmp6->icmp6_type == ICMP6_ECHO_REQUEST) { - printf("(echo request)"); - } else if (icmp6->icmp6_type == ICMP6_ECHO_REPLY) { - printf("(echo reply)"); - } - printf("\n"); - printf("code = %x\n", icmp6->icmp6_code); - - printf("checksum = %x\n", icmp6->icmp6_cksum); - - if ((icmp6->icmp6_type == ICMP6_ECHO_REQUEST) || (icmp6->icmp6_type == ICMP6_ECHO_REPLY)) { - printf("icmp6_id = %x\n", icmp6->icmp6_id); - printf("icmp6_seq = %x\n", icmp6->icmp6_seq); - } -} - -/* print udp header */ -void dump_udp_generic(const struct udphdr *udp, uint32_t temp_checksum, const uint8_t *payload, - size_t payload_size) { - uint16_t my_checksum; - - temp_checksum = ip_checksum_add(temp_checksum, udp, sizeof(struct udphdr)); - temp_checksum = ip_checksum_add(temp_checksum, payload, payload_size); - my_checksum = ip_checksum_finish(temp_checksum); - - printf("UDP\n"); - printf("source = %x\n", ntohs(udp->source)); - printf("dest = %x\n", ntohs(udp->dest)); - printf("len = %x\n", ntohs(udp->len)); - printf("check = %x (mine %x)\n", udp->check, my_checksum); -} - -/* print ipv4/udp header */ -void dump_udp(const struct udphdr *udp, const struct iphdr *ip, const uint8_t *payload, - size_t payload_size) { - uint32_t temp_checksum; - temp_checksum = ipv4_pseudo_header_checksum(ip, sizeof(*udp) + payload_size); - dump_udp_generic(udp, temp_checksum, payload, payload_size); -} - -/* print ipv6/udp header */ -void dump_udp6(const struct udphdr *udp, const struct ip6_hdr *ip6, const uint8_t *payload, - size_t payload_size) { - uint32_t temp_checksum; - temp_checksum = ipv6_pseudo_header_checksum(ip6, sizeof(*udp) + payload_size, IPPROTO_UDP); - dump_udp_generic(udp, temp_checksum, payload, payload_size); -} - -/* print tcp header */ -void dump_tcp_generic(const struct tcphdr *tcp, const uint8_t *options, size_t options_size, - uint32_t temp_checksum, const uint8_t *payload, size_t payload_size) { - uint16_t my_checksum; - - temp_checksum = ip_checksum_add(temp_checksum, tcp, sizeof(struct tcphdr)); - if (options) { - temp_checksum = ip_checksum_add(temp_checksum, options, options_size); - } - temp_checksum = ip_checksum_add(temp_checksum, payload, payload_size); - my_checksum = ip_checksum_finish(temp_checksum); - - printf("TCP\n"); - printf("source = %x\n", ntohs(tcp->source)); - printf("dest = %x\n", ntohs(tcp->dest)); - printf("seq = %x\n", ntohl(tcp->seq)); - printf("ack = %x\n", ntohl(tcp->ack_seq)); - printf("d_off = %x\n", tcp->doff); - printf("res1 = %x\n", tcp->res1); -#ifdef __BIONIC__ - printf("CWR = %x\n", tcp->cwr); - printf("ECE = %x\n", tcp->ece); -#else - printf("CWR/ECE = %x\n", tcp->res2); -#endif - printf("urg = %x ack = %x psh = %x rst = %x syn = %x fin = %x\n", tcp->urg, tcp->ack, - tcp->psh, tcp->rst, tcp->syn, tcp->fin); - printf("window = %x\n", ntohs(tcp->window)); - printf("check = %x [mine %x]\n", tcp->check, my_checksum); - printf("urgent = %x\n", tcp->urg_ptr); - - if (options) { - size_t i; - - printf("options: "); - for (i = 0; i < options_size; i++) { - printf("%x ", *(options + i)); - } - printf("\n"); - } -} - -/* print ipv4/tcp header */ -void dump_tcp(const struct tcphdr *tcp, const struct iphdr *ip, const uint8_t *payload, - size_t payload_size, const uint8_t *options, size_t options_size) { - uint32_t temp_checksum; - - temp_checksum = ipv4_pseudo_header_checksum(ip, sizeof(*tcp) + options_size + payload_size); - dump_tcp_generic(tcp, options, options_size, temp_checksum, payload, payload_size); -} - -/* print ipv6/tcp header */ -void dump_tcp6(const struct tcphdr *tcp, const struct ip6_hdr *ip6, const uint8_t *payload, - size_t payload_size, const uint8_t *options, size_t options_size) { - uint32_t temp_checksum; - - temp_checksum = - ipv6_pseudo_header_checksum(ip6, sizeof(*tcp) + options_size + payload_size, IPPROTO_TCP); - dump_tcp_generic(tcp, options, options_size, temp_checksum, payload, payload_size); -} - -/* generic hex dump */ -void logcat_hexdump(const char *info, const uint8_t *data, size_t len) { - char output[MAXDUMPLEN * 3 + 2]; - size_t i; - - output[0] = '\0'; - for (i = 0; i < len && i < MAXDUMPLEN; i++) { - snprintf(output + i * 3, 4, " %02x", data[i]); - } - output[len * 3 + 3] = '\0'; - - logmsg(ANDROID_LOG_WARN, "info %s len %d data%s", info, len, output); -} - -void dump_iovec(const struct iovec *iov, int iov_len) { - int i; - char *str; - for (i = 0; i < iov_len; i++) { - asprintf(&str, "iov[%d]: ", i); - logcat_hexdump(str, iov[i].iov_base, iov[i].iov_len); - free(str); - } -} -#endif // CLAT_DEBUG |