| File: | src/usr.sbin/tcpdump/print-ripng.c |
| Warning: | line 83, column 3 Value stored to 'trunc' is never read |
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| 1 | /* $OpenBSD: print-ripng.c,v 1.7 2018/10/22 16:12:45 kn Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1989, 1990, 1991, 1993, 1994 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that: (1) source code distributions |
| 9 | * retain the above copyright notice and this paragraph in its entirety, (2) |
| 10 | * distributions including binary code include the above copyright notice and |
| 11 | * this paragraph in its entirety in the documentation or other materials |
| 12 | * provided with the distribution, and (3) all advertising materials mentioning |
| 13 | * features or use of this software display the following acknowledgement: |
| 14 | * ``This product includes software developed by the University of California, |
| 15 | * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| 16 | * the University nor the names of its contributors may be used to endorse |
| 17 | * or promote products derived from this software without specific prior |
| 18 | * written permission. |
| 19 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| 20 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| 21 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 22 | */ |
| 23 | |
| 24 | #include <sys/time.h> |
| 25 | #include <sys/types.h> |
| 26 | #include <sys/socket.h> |
| 27 | |
| 28 | #include <netinet/in.h> |
| 29 | #include <netinet/ip.h> |
| 30 | #include <netinet/ip_var.h> |
| 31 | #include <netinet/udp.h> |
| 32 | #include <netinet/udp_var.h> |
| 33 | |
| 34 | #include <errno(*__errno()).h> |
| 35 | #include <stdio.h> |
| 36 | |
| 37 | #include <netinet/ip6.h> |
| 38 | |
| 39 | #include "route6d.h" |
| 40 | #include "interface.h" |
| 41 | #include "addrtoname.h" |
| 42 | |
| 43 | static int |
| 44 | rip6_entry_print(const struct netinfo6 *ni, int metric) |
| 45 | { |
| 46 | int l; |
| 47 | l = printf("%s/%d", ip6addr_string(&ni->rip6_dest)getname6((const u_char *)(&ni->rip6_dest)), ni->rip6_plen); |
| 48 | if (ni->rip6_tag) |
| 49 | l += printf(" [%d]", ntohs(ni->rip6_tag)(__uint16_t)(__builtin_constant_p(ni->rip6_tag) ? (__uint16_t )(((__uint16_t)(ni->rip6_tag) & 0xffU) << 8 | (( __uint16_t)(ni->rip6_tag) & 0xff00U) >> 8) : __swap16md (ni->rip6_tag))); |
| 50 | if (metric) |
| 51 | l += printf(" (%d)", ni->rip6_metric); |
| 52 | return l; |
| 53 | } |
| 54 | |
| 55 | void |
| 56 | ripng_print(const u_char *dat, int length) |
| 57 | { |
| 58 | const struct rip6 *rp = (struct rip6 *)dat; |
| 59 | const struct netinfo6 *ni; |
| 60 | int amt = snapend - dat; |
| 61 | int i = min(length, amt)((length)>(amt)?(amt):(length)) - |
| 62 | (sizeof(struct rip6) - sizeof(struct netinfo6)); |
| 63 | int j; |
| 64 | int trunc; |
| 65 | |
| 66 | if (i < 0) |
| 67 | return; |
| 68 | |
| 69 | switch (rp->rip6_cmd) { |
| 70 | |
| 71 | case RIP6_REQUEST1: |
| 72 | j = length / sizeof(*ni); |
| 73 | if (j == 1 |
| 74 | && rp->rip6_netsrip6un.ru6_nets->rip6_metric == HOPCNT_INFINITY616 |
| 75 | && IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)((*(const u_int32_t *)(const void *)(&(&rp->rip6un .ru6_nets->rip6_dest)->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rp->rip6un .ru6_nets->rip6_dest)->__u6_addr.__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&rp->rip6un .ru6_nets->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rp->rip6un .ru6_nets->rip6_dest)->__u6_addr.__u6_addr8[12]) == 0))) { |
| 76 | printf("ripng-req dump"); |
| 77 | break; |
| 78 | } |
| 79 | if (j * sizeof(*ni) != length - 4) |
| 80 | printf("ripng-req %d[%d]:", j, length); |
| 81 | else |
| 82 | printf("ripng-req %d:", j); |
| 83 | trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); |
Value stored to 'trunc' is never read | |
| 84 | for (ni = rp->rip6_netsrip6un.ru6_nets; (i -= sizeof(*ni)) >= 0; ++ni) { |
| 85 | if (vflag) |
| 86 | printf("\n\t"); |
| 87 | else |
| 88 | printf(" "); |
| 89 | rip6_entry_print(ni, 0); |
| 90 | } |
| 91 | break; |
| 92 | case RIP6_RESPONSE2: |
| 93 | j = length / sizeof(*ni); |
| 94 | if (j * sizeof(*ni) != length - 4) |
| 95 | printf("ripng-resp %d[%d]:", j, length); |
| 96 | else |
| 97 | printf("ripng-resp %d:", j); |
| 98 | trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); |
| 99 | for (ni = rp->rip6_netsrip6un.ru6_nets; (i -= sizeof(*ni)) >= 0; ++ni) { |
| 100 | if (vflag) |
| 101 | printf("\n\t"); |
| 102 | else |
| 103 | printf(" "); |
| 104 | rip6_entry_print(ni, ni->rip6_metric); |
| 105 | } |
| 106 | if (trunc) |
| 107 | printf("[|rip]"); |
| 108 | break; |
| 109 | default: |
| 110 | printf("ripng-%d ?? %d", rp->rip6_cmd, length); |
| 111 | break; |
| 112 | } |
| 113 | if (rp->rip6_vers != RIP6_VERSION1) |
| 114 | printf(" [vers %d]", rp->rip6_vers); |
| 115 | } |