As the iov_tail has a non zero offset (because of the presence of
packet headers in the iov array), we must copy it to a new
iov array (using iov_tail_splice()) to pass it to sendmsg().
We cannot use anymore iov_tail_msghdr(), so remove it.
Signed-off-by: Laurent Vivier
---
icmp.c | 30 +++++++++++++++++++-----------
icmp.h | 2 +-
iov.c | 23 -----------------------
iov.h | 2 --
tap.c | 7 ++-----
5 files changed, 22 insertions(+), 42 deletions(-)
diff --git a/icmp.c b/icmp.c
index 71c496540310..be800e30c369 100644
--- a/icmp.c
+++ b/icmp.c
@@ -44,6 +44,7 @@
#define ICMP_ECHO_TIMEOUT 60 /* s, timeout for ICMP socket activity */
#define ICMP_NUM_IDS (1U << 16)
+#define MAX_IOV_ICMP 16 /* Arbitrary, should be enough */
/**
* ping_at_sidx() - Get ping specific flow at given sidx
@@ -229,36 +230,33 @@ cancel:
* @af: Address family, AF_INET or AF_INET6
* @saddr: Source address
* @daddr: Destination address
- * @p: Packet pool, single packet with ICMP/ICMPv6 header
+ * @data: Single packet with ICMP/ICMPv6 header
* @now: Current timestamp
*
* Return: count of consumed packets (always 1, even if malformed)
*/
int icmp_tap_handler(const struct ctx *c, uint8_t pif, sa_family_t af,
const void *saddr, const void *daddr,
- const struct pool *p, const struct timespec *now)
+ struct iov_tail *data, const struct timespec *now)
{
+ struct iovec iov[MAX_IOV_ICMP];
struct icmp_ping_flow *pingf;
const struct flowside *tgt;
union sockaddr_inany sa;
- struct iov_tail data;
struct msghdr msh;
uint16_t id, seq;
union flow *flow;
uint8_t proto;
- socklen_t sl;
+ int cnt;
(void)saddr;
ASSERT(pif == PIF_TAP);
- if (!packet_get(p, 0, &data))
- return -1;
-
if (af == AF_INET) {
struct icmphdr ih_storage;
const struct icmphdr *ih;
- ih = IOV_PEEK_HEADER(&data, ih_storage);
+ ih = IOV_PEEK_HEADER(data, ih_storage);
if (!ih)
return 1;
@@ -272,7 +270,7 @@ int icmp_tap_handler(const struct ctx *c, uint8_t pif, sa_family_t af,
struct icmp6hdr ih_storage;
const struct icmp6hdr *ih;
- ih = IOV_PEEK_HEADER(&data, ih_storage);
+ ih = IOV_PEEK_HEADER(data, ih_storage);
if (!ih)
return 1;
@@ -286,6 +284,10 @@ int icmp_tap_handler(const struct ctx *c, uint8_t pif, sa_family_t af,
ASSERT(0);
}
+ cnt = iov_tail_clone(&iov[0], MAX_IOV_ICMP, data);
+ if (cnt < 0)
+ return 1;
+
flow = flow_at_sidx(flow_lookup_af(c, proto, PIF_TAP,
af, saddr, daddr, id, id));
@@ -300,8 +302,14 @@ int icmp_tap_handler(const struct ctx *c, uint8_t pif, sa_family_t af,
pingf->ts = now->tv_sec;
- pif_sockaddr(c, &sa, &sl, PIF_HOST, &tgt->eaddr, 0);
- iov_tail_msghdr(&msh, &data, &sa, sl);
+ pif_sockaddr(c, &sa, &msh.msg_namelen, PIF_HOST, &tgt->eaddr, 0);
+ msh.msg_name = &sa;
+ msh.msg_iov = iov;
+ msh.msg_iovlen = cnt;
+ msh.msg_control = NULL;
+ msh.msg_controllen = 0;
+ msh.msg_flags = 0;
+
if (sendmsg(pingf->sock, &msh, MSG_NOSIGNAL) < 0) {
flow_dbg_perror(pingf, "failed to relay request to socket");
} else {
diff --git a/icmp.h b/icmp.h
index 5ce22b5eca1f..d1cecb20e29d 100644
--- a/icmp.h
+++ b/icmp.h
@@ -14,7 +14,7 @@ struct icmp_ping_flow;
void icmp_sock_handler(const struct ctx *c, union epoll_ref ref);
int icmp_tap_handler(const struct ctx *c, uint8_t pif, sa_family_t af,
const void *saddr, const void *daddr,
- const struct pool *p, const struct timespec *now);
+ struct iov_tail *data, const struct timespec *now);
void icmp_init(void);
/**
diff --git a/iov.c b/iov.c
index c9b32befeb83..98350fb9690e 100644
--- a/iov.c
+++ b/iov.c
@@ -157,29 +157,6 @@ size_t iov_size(const struct iovec *iov, size_t iov_cnt)
return len;
}
-/**
- * iov_tail_msghdr - Initialize a msghdr from an IOV tail structure
- * @msh: msghdr to initialize
- * @tail: iov_tail to use to set msg_iov and msg_iovlen
- * @msg_name: Pointer to set to msg_name
- * @msg_namelen: Size of @msg_name
- */
-void iov_tail_msghdr(struct msghdr *msh, struct iov_tail *tail,
- void *msg_name, socklen_t msg_namelen)
-{
- iov_tail_prune(tail);
-
- ASSERT(tail->off == 0);
-
- msh->msg_name = msg_name;
- msh->msg_namelen = msg_namelen;
- msh->msg_iov = (struct iovec *)tail->iov;
- msh->msg_iovlen = tail->cnt;
- msh->msg_control = NULL;
- msh->msg_controllen = 0;
- msh->msg_flags = 0;
-}
-
/**
* iov_tail_prune() - Remove any unneeded buffers from an IOV tail
* @tail: IO vector tail (modified)
diff --git a/iov.h b/iov.h
index 75c3b07a87e3..ccdb690ef3f1 100644
--- a/iov.h
+++ b/iov.h
@@ -82,8 +82,6 @@ struct iov_tail {
1, \
(off_))
-void iov_tail_msghdr(struct msghdr *msh, struct iov_tail *tail,
- void *msg_name, socklen_t msg_namelen);
bool iov_tail_prune(struct iov_tail *tail);
size_t iov_tail_size(struct iov_tail *tail);
bool iov_tail_drop(struct iov_tail *tail, size_t len);
diff --git a/tap.c b/tap.c
index 3262b44c4287..48152a84674c 100644
--- a/tap.c
+++ b/tap.c
@@ -764,17 +764,14 @@ resume:
continue;
if (iph->protocol == IPPROTO_ICMP) {
- PACKET_POOL_P(pkt, 1, in->buf, in->buf_size);
-
if (c->no_icmp)
continue;
tap_packet_debug(iph, NULL, NULL, 0, NULL, 1);
- packet_add(pkt, &data);
icmp_tap_handler(c, PIF_TAP, AF_INET,
&iph->saddr, &iph->daddr,
- pkt, now);
+ &data, now);
continue;
}
@@ -964,7 +961,7 @@ resume:
tap_packet_debug(NULL, ip6h, NULL, proto, NULL, 1);
icmp_tap_handler(c, PIF_TAP, AF_INET6,
- saddr, daddr, pkt, now);
+ saddr, daddr, &data, now);
continue;
}
--
2.49.0