Use packet_data() and extract headers using IOV_REMOVE_HEADER()
and IOV_PEEK_HEADER() rather than packet_get().
Remove packet_get() as it is not used anymore.
Signed-off-by: Laurent Vivier <lvivier(a)redhat.com>
---
packet.c | 70 --------------------------------------------------------
packet.h | 11 ---------
tap.c | 23 +++++++++++--------
3 files changed, 14 insertions(+), 90 deletions(-)
diff --git a/packet.c b/packet.c
index 7489010e02eb..53ede9fcb509 100644
--- a/packet.c
+++ b/packet.c
@@ -121,76 +121,6 @@ void packet_add_do(struct pool *p, struct iov_tail *data,
p->count++;
}
-/**
- * packet_get_try_do() - Get data range from packet descriptor from given pool
- * @p: Packet pool
- * @idx: Index of packet descriptor in pool
- * @offset: Offset of data range in packet descriptor
- * @len: Length of desired data range
- * @left: Length of available data after range, set on return, can be NULL
- * @func: For tracing: name of calling function
- * @line: For tracing: caller line of function call
- *
- * Return: pointer to start of data range, NULL on invalid range or descriptor
- */
-/* cppcheck-suppress [staticFunction] */
-void *packet_get_try_do(const struct pool *p, size_t idx, size_t offset,
- size_t len, size_t *left, const char *func, int line)
-{
- char *ptr;
-
- ASSERT_WITH_MSG(p->count <= p->size,
- "Corrupt pool count: %zu, size: %zu, %s:%i",
- p->count, p->size, func, line);
-
- if (idx >= p->count) {
- debug("packet %zu from pool count: %zu, %s:%i",
- idx, p->count, func, line);
- return NULL;
- }
-
- if (offset > p->pkt[idx].iov_len ||
- len > (p->pkt[idx].iov_len - offset))
- return NULL;
-
- ptr = (char *)p->pkt[idx].iov_base + offset;
-
- ASSERT_WITH_MSG(!packet_check_range(p, ptr, len, func, line),
- "Corrupt packet pool, %s:%i", func, line);
-
- if (left)
- *left = p->pkt[idx].iov_len - offset - len;
-
- return ptr;
-}
-
-/**
- * packet_get_do() - Get data range from packet descriptor from given pool
- * @p: Packet pool
- * @idx: Index of packet descriptor in pool
- * @offset: Offset of data range in packet descriptor
- * @len: Length of desired data range
- * @left: Length of available data after range, set on return, can be NULL
- * @func: For tracing: name of calling function
- * @line: For tracing: caller line of function call
- *
- * Return: as packet_get_try_do() but log a trace message when returning NULL
- */
-void *packet_get_do(const struct pool *p, const size_t idx,
- size_t offset, size_t len, size_t *left,
- const char *func, int line)
-{
- void *r = packet_get_try_do(p, idx, offset, len, left, func, line);
-
- if (!r) {
- trace("missing packet data length %zu, offset %zu from "
- "length %zu, %s:%i",
- len, offset, p->pkt[idx].iov_len, func, line);
- }
-
- return r;
-}
-
/**
* packet_data_do() - Get data range from packet descriptor from given pool
* @p: Packet pool
diff --git a/packet.h b/packet.h
index 062afb978124..dab8274fa5c5 100644
--- a/packet.h
+++ b/packet.h
@@ -33,12 +33,6 @@ struct pool {
int vu_packet_check_range(void *buf, const char *ptr, size_t len);
void packet_add_do(struct pool *p, struct iov_tail *data,
const char *func, int line);
-void *packet_get_try_do(const struct pool *p, const size_t idx,
- size_t offset, size_t len, size_t *left,
- const char *func, int line);
-void *packet_get_do(const struct pool *p, const size_t idx,
- size_t offset, size_t len, size_t *left,
- const char *func, int line);
bool packet_data_do(const struct pool *p, const size_t idx,
struct iov_tail *data,
const char *func, int line);
@@ -47,11 +41,6 @@ void pool_flush(struct pool *p);
#define packet_add(p, data) \
packet_add_do(p, data, __func__, __LINE__)
-
-#define packet_get_try(p, idx, offset, len, left) \
- packet_get_try_do(p, idx, offset, len, left, __func__, __LINE__)
-#define packet_get(p, idx, offset, len, left) \
- packet_get_do(p, idx, offset, len, left, __func__, __LINE__)
#define packet_data(p, idx, data) \
packet_data_do(p, idx, data, __func__, __LINE__)
diff --git a/tap.c b/tap.c
index aad6d4dc1f61..56b8cb21d9dd 100644
--- a/tap.c
+++ b/tap.c
@@ -898,17 +898,24 @@ resume:
const struct udphdr *uh;
struct iov_tail data;
struct ipv6hdr *ip6h;
+ struct ipv6hdr ip6hc;
+ struct ethhdr ehc;
+ struct udphdr uhc;
uint8_t proto;
- char *l4h;
- eh = packet_get(in, i, 0, sizeof(*eh), NULL);
+ if (!packet_data(in, i, &data))
+ return -1;
+
+ eh = IOV_REMOVE_HEADER(&data, ehc);
if (!eh)
continue;
- ip6h = packet_get(in, i, sizeof(*eh), sizeof(*ip6h), &check);
+ ip6h = IOV_PEEK_HEADER(&data, ip6hc);
if (!ip6h)
continue;
+ check = iov_tail_size(&data) - sizeof(*ip6h);
+
saddr = &ip6h->saddr;
daddr = &ip6h->daddr;
@@ -916,10 +923,8 @@ resume:
if (plen != check)
continue;
- data = IOV_TAIL_FROM_BUF(ip6h, sizeof(*ip6h) + check, 0);
if (!ipv6_l4hdr(&data, &proto, &l4len))
continue;
- l4h = (char *)data.iov[0].iov_base + data.off;
if (IN6_IS_ADDR_LOOPBACK(saddr) || IN6_IS_ADDR_LOOPBACK(daddr)) {
char sstr[INET6_ADDRSTRLEN], dstr[INET6_ADDRSTRLEN];
@@ -944,6 +949,8 @@ resume:
}
if (proto == IPPROTO_ICMPV6) {
+ const struct icmp6hdr *l4h;
+ struct icmp6hdr l4hc;
PACKET_POOL_P(pkt, 1, in->buf, in->buf_size);
if (c->no_icmp)
@@ -952,9 +959,9 @@ resume:
if (l4len < sizeof(struct icmp6hdr))
continue;
- data = IOV_TAIL_FROM_BUF(l4h, l4len, 0);
packet_add(pkt, &data);
+ l4h = IOV_PEEK_HEADER(&data, l4hc);
if (ndp(c, (struct icmp6hdr *)l4h, saddr, pkt))
continue;
@@ -967,12 +974,11 @@ resume:
if (l4len < sizeof(*uh))
continue;
- uh = (struct udphdr *)l4h;
+ uh = IOV_PEEK_HEADER(&data, uhc);
if (proto == IPPROTO_UDP) {
PACKET_POOL_P(pkt, 1, in->buf, in->buf_size);
- data = IOV_TAIL_FROM_BUF(l4h, l4len, 0);
packet_add(pkt, &data);
if (dhcpv6(c, pkt, saddr, daddr))
@@ -1029,7 +1035,6 @@ resume:
#undef L4_SET
append:
- data = IOV_TAIL_FROM_BUF(l4h, l4len, 0);
packet_add((struct pool *)&seq->p, &data);
}
--
2.49.0