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64 lines
2.0 KiB
64 lines
2.0 KiB
6 years ago
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Resolves: #1444281
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commit f3c189e26b3ba803b703d724e831e59390d0af13
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Author: Jan Synacek <jsynacek@redhat.com>
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Date: Mon May 15 12:07:59 2017 +0200
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ping: fix pmtu discovery for ipv6
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Fixes: #40
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diff --git a/ping.c b/ping.c
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index 45cca8d..fade2c9 100644
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--- a/ping.c
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+++ b/ping.c
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@@ -107,7 +107,7 @@ int cmsg_len;
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static struct sockaddr_in source = { .sin_family = AF_INET };
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char *device;
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-static int pmtudisc = -1;
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+int pmtudisc = -1;
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static void create_socket(socket_st *sock, int family, int socktype, int protocol, int requisite)
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{
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@@ -498,8 +498,14 @@ main(int argc, char **argv)
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enable_capability_raw();
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if (hints.ai_family != AF_INET6)
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create_socket(&sock4, AF_INET, hints.ai_socktype, IPPROTO_ICMP, hints.ai_family == AF_INET);
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- if (hints.ai_family != AF_INET)
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+ if (hints.ai_family != AF_INET) {
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create_socket(&sock6, AF_INET6, hints.ai_socktype, IPPROTO_ICMPV6, sock4.fd == -1);
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+ /* This may not be needed if both protocol versions always had the same value, but
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+ * since I don't know that, it's better to be safe than sorry. */
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+ pmtudisc = pmtudisc == IP_PMTUDISC_DO ? IPV6_PMTUDISC_DO :
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+ pmtudisc == IP_PMTUDISC_DONT ? IPV6_PMTUDISC_DONT :
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+ pmtudisc == IP_PMTUDISC_WANT ? IPV6_PMTUDISC_WANT : pmtudisc;
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+ }
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disable_capability_raw();
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/* Limit address family on single-protocol systems */
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diff --git a/ping.h b/ping.h
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index 1253fa0..78e3853 100644
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--- a/ping.h
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+++ b/ping.h
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@@ -168,6 +168,7 @@ extern volatile int status_snapshot;
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extern int confirm;
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extern int confirm_flag;
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extern char *device;
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+extern int pmtudisc;
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extern volatile int in_pr_addr; /* pr_addr() is executing */
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extern jmp_buf pr_addr_jmp;
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diff --git a/ping6_common.c b/ping6_common.c
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index a5627ae..f5c81fd 100644
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--- a/ping6_common.c
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+++ b/ping6_common.c
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@@ -101,7 +101,6 @@ void ping6_usage(unsigned) __attribute((noreturn));
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struct sockaddr_in6 source6 = { .sin6_family = AF_INET6 };
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char *device;
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-int pmtudisc=-1;
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#if defined(USE_GCRYPT) || defined(USE_OPENSSL) || defined(USE_NETTLE)
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#include "iputils_md5dig.h"
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