From: David Gibson <david@gibson.dropbear.id.au>
To: Stefano Brivio <sbrivio@redhat.com>,
Jon Maloy <jmaloy@redhat.com>,
passt-dev@passt.top
Cc: David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH 2/2] udp: Improve name of UDP related ICMP sending functions
Date: Wed, 26 Mar 2025 11:15:01 +1100 [thread overview]
Message-ID: <20250326001501.1866234-3-david@gibson.dropbear.id.au> (raw)
In-Reply-To: <20250326001501.1866234-1-david@gibson.dropbear.id.au>
udp_send_conn_fail_icmp[46]() aren't actually specific to connections
failing: they can propagate a variety of ICMP errors, which might or might
not break a "connection". They are, however, specific to sending ICMP
errors to the tap connection, not splice or host. Rename them to better
reflect that.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
udp.c | 33 ++++++++++++++++-----------------
1 file changed, 16 insertions(+), 17 deletions(-)
diff --git a/udp.c b/udp.c
index a706fed9..88128181 100644
--- a/udp.c
+++ b/udp.c
@@ -411,7 +411,7 @@ static void udp_tap_prepare(const struct mmsghdr *mmh,
}
/**
- * udp_send_conn_fail_icmp4() - Construct and send ICMPv4 to local peer
+ * udp_send_tap_icmp4() - Construct and send ICMPv4 to local peer
* @c: Execution context
* @ee: Extended error descriptor
* @toside: Destination side of flow
@@ -419,11 +419,11 @@ static void udp_tap_prepare(const struct mmsghdr *mmh,
* @in: First bytes (max 8) of original UDP message body
* @dlen: Length of the read part of original UDP message body
*/
-static void udp_send_conn_fail_icmp4(const struct ctx *c,
- const struct sock_extended_err *ee,
- const struct flowside *toside,
- struct in_addr saddr,
- const void *in, size_t dlen)
+static void udp_send_tap_icmp4(const struct ctx *c,
+ const struct sock_extended_err *ee,
+ const struct flowside *toside,
+ struct in_addr saddr,
+ const void *in, size_t dlen)
{
struct in_addr oaddr = toside->oaddr.v4mapped.a4;
struct in_addr eaddr = toside->eaddr.v4mapped.a4;
@@ -455,7 +455,7 @@ static void udp_send_conn_fail_icmp4(const struct ctx *c,
/**
- * udp_send_conn_fail_icmp6() - Construct and send ICMPv6 to local peer
+ * udp_send_tap_icmp6() - Construct and send ICMPv6 to local peer
* @c: Execution context
* @ee: Extended error descriptor
* @toside: Destination side of flow
@@ -464,11 +464,11 @@ static void udp_send_conn_fail_icmp4(const struct ctx *c,
* @dlen: Length of the read part of original UDP message body
* @flow: IPv6 flow identifier
*/
-static void udp_send_conn_fail_icmp6(const struct ctx *c,
- const struct sock_extended_err *ee,
- const struct flowside *toside,
- const struct in6_addr *saddr,
- void *in, size_t dlen, uint32_t flow)
+static void udp_send_tap_icmp6(const struct ctx *c,
+ const struct sock_extended_err *ee,
+ const struct flowside *toside,
+ const struct in6_addr *saddr,
+ void *in, size_t dlen, uint32_t flow)
{
const struct in6_addr *oaddr = &toside->oaddr.a6;
const struct in6_addr *eaddr = &toside->eaddr.a6;
@@ -564,12 +564,11 @@ static int udp_sock_recverr(const struct ctx *c, union epoll_ref ref)
* to socket? */
} else if (hdr->cmsg_level == IPPROTO_IP) {
dlen = MIN(dlen, ICMP4_MAX_DLEN);
- udp_send_conn_fail_icmp4(c, ee, toside, saddr.sa4.sin_addr,
- data, dlen);
+ udp_send_tap_icmp4(c, ee, toside, saddr.sa4.sin_addr,
+ data, dlen);
} else if (hdr->cmsg_level == IPPROTO_IPV6) {
- udp_send_conn_fail_icmp6(c, ee, toside,
- &saddr.sa6.sin6_addr,
- data, dlen, sidx.flowi);
+ udp_send_tap_icmp6(c, ee, toside, &saddr.sa6.sin6_addr,
+ data, dlen, sidx.flowi);
}
} else {
trace("Ignoring received IP_RECVERR cmsg on listener socket");
--
@@ -411,7 +411,7 @@ static void udp_tap_prepare(const struct mmsghdr *mmh,
}
/**
- * udp_send_conn_fail_icmp4() - Construct and send ICMPv4 to local peer
+ * udp_send_tap_icmp4() - Construct and send ICMPv4 to local peer
* @c: Execution context
* @ee: Extended error descriptor
* @toside: Destination side of flow
@@ -419,11 +419,11 @@ static void udp_tap_prepare(const struct mmsghdr *mmh,
* @in: First bytes (max 8) of original UDP message body
* @dlen: Length of the read part of original UDP message body
*/
-static void udp_send_conn_fail_icmp4(const struct ctx *c,
- const struct sock_extended_err *ee,
- const struct flowside *toside,
- struct in_addr saddr,
- const void *in, size_t dlen)
+static void udp_send_tap_icmp4(const struct ctx *c,
+ const struct sock_extended_err *ee,
+ const struct flowside *toside,
+ struct in_addr saddr,
+ const void *in, size_t dlen)
{
struct in_addr oaddr = toside->oaddr.v4mapped.a4;
struct in_addr eaddr = toside->eaddr.v4mapped.a4;
@@ -455,7 +455,7 @@ static void udp_send_conn_fail_icmp4(const struct ctx *c,
/**
- * udp_send_conn_fail_icmp6() - Construct and send ICMPv6 to local peer
+ * udp_send_tap_icmp6() - Construct and send ICMPv6 to local peer
* @c: Execution context
* @ee: Extended error descriptor
* @toside: Destination side of flow
@@ -464,11 +464,11 @@ static void udp_send_conn_fail_icmp4(const struct ctx *c,
* @dlen: Length of the read part of original UDP message body
* @flow: IPv6 flow identifier
*/
-static void udp_send_conn_fail_icmp6(const struct ctx *c,
- const struct sock_extended_err *ee,
- const struct flowside *toside,
- const struct in6_addr *saddr,
- void *in, size_t dlen, uint32_t flow)
+static void udp_send_tap_icmp6(const struct ctx *c,
+ const struct sock_extended_err *ee,
+ const struct flowside *toside,
+ const struct in6_addr *saddr,
+ void *in, size_t dlen, uint32_t flow)
{
const struct in6_addr *oaddr = &toside->oaddr.a6;
const struct in6_addr *eaddr = &toside->eaddr.a6;
@@ -564,12 +564,11 @@ static int udp_sock_recverr(const struct ctx *c, union epoll_ref ref)
* to socket? */
} else if (hdr->cmsg_level == IPPROTO_IP) {
dlen = MIN(dlen, ICMP4_MAX_DLEN);
- udp_send_conn_fail_icmp4(c, ee, toside, saddr.sa4.sin_addr,
- data, dlen);
+ udp_send_tap_icmp4(c, ee, toside, saddr.sa4.sin_addr,
+ data, dlen);
} else if (hdr->cmsg_level == IPPROTO_IPV6) {
- udp_send_conn_fail_icmp6(c, ee, toside,
- &saddr.sa6.sin6_addr,
- data, dlen, sidx.flowi);
+ udp_send_tap_icmp6(c, ee, toside, &saddr.sa6.sin6_addr,
+ data, dlen, sidx.flowi);
}
} else {
trace("Ignoring received IP_RECVERR cmsg on listener socket");
--
2.49.0
next prev parent reply other threads:[~2025-03-26 0:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-26 0:14 [PATCH 0/2] udp: Fix some minor warts in the ICMP error propagation code David Gibson
2025-03-26 0:15 ` [PATCH 1/2] udp: Don't attempt to forward ICMP socket errors to other sockets David Gibson
2025-03-26 22:23 ` Jon Maloy
2025-03-26 0:15 ` David Gibson [this message]
2025-03-26 22:24 ` [PATCH 2/2] udp: Improve name of UDP related ICMP sending functions Jon Maloy
2025-03-26 18:57 ` [PATCH 0/2] udp: Fix some minor warts in the ICMP error propagation code Stefano Brivio
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