Use packet_base() 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 | 53 -----------------------------------------------------
packet.h | 10 ----------
tap.c | 23 ++++++++++++++---------
3 files changed, 14 insertions(+), 72 deletions(-)
diff --git a/packet.c b/packet.c
index 8066ac12502b..e917b0daad2a 100644
--- a/packet.c
+++ b/packet.c
@@ -103,59 +103,6 @@ void packet_add_do(struct pool *p, struct iov_tail *data,
p->count++;
}
-/**
- * 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, NULL means no trace()
- * @line: For tracing: caller line of function call
- *
- * Return: pointer to start of data range, NULL on invalid range or descriptor
- */
-void *packet_get_do(const struct pool *p, size_t idx, size_t offset,
- size_t len, size_t *left, const char *func, int line)
-{
- char *ptr;
-
- if (idx >= p->size || idx >= p->count) {
- if (func) {
- trace("packet %zu from pool size: %zu, count: %zu, "
- "%s:%i", idx, p->size, p->count, func, line);
- }
- return NULL;
- }
-
- if (len > PACKET_MAX_LEN) {
- if (func) {
- trace("packet data length %zu, %s:%i",
- len, func, line);
- }
- return NULL;
- }
-
- if (len + offset > p->pkt[idx].iov_len) {
- if (func) {
- trace("data length %zu, offset %zu from length %zu, "
- "%s:%i", len, offset, p->pkt[idx].iov_len,
- func, line);
- }
- return NULL;
- }
-
- ptr = (char *)p->pkt[idx].iov_base + offset;
-
- if (packet_check_range(p, ptr, len, func, line))
- return NULL;
-
- if (left)
- *left = p->pkt[idx].iov_len - offset - len;
-
- return ptr;
-}
-
/**
* packet_base_do() - Get data range from packet descriptor from given pool
* @p: Packet pool
diff --git a/packet.h b/packet.h
index 35058e747a43..787535a228a5 100644
--- a/packet.h
+++ b/packet.h
@@ -32,9 +32,6 @@ 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_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_base_do(const struct pool *p, const size_t idx,
struct iov_tail *data,
const char *func, int line);
@@ -43,13 +40,6 @@ void pool_flush(struct pool *p);
#define packet_add(p, data) \
packet_add_do(p, data, __func__, __LINE__)
-#define packet_get(p, idx, offset, len, left) \
- packet_get_do(p, idx, offset, len, left, __func__, __LINE__)
-
-
-#define packet_get_try(p, idx, offset, len, left) \
- packet_get_do(p, idx, offset, len, left, NULL, 0)
-
#define packet_base(p, idx, data) \
packet_base_do(p, idx, data, __func__, __LINE__)
diff --git a/tap.c b/tap.c
index 280a04981954..d6a1da8481a2 100644
--- a/tap.c
+++ b/tap.c
@@ -870,17 +870,24 @@ 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_base(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;
@@ -888,10 +895,8 @@ 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];
@@ -916,6 +921,8 @@ 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)
@@ -924,9 +931,9 @@ 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;
@@ -939,12 +946,11 @@ 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))
@@ -999,7 +1005,6 @@ resume:
#undef L4_SET
append:
- data = IOV_TAIL_FROM_BUF(l4h, l4len, 0);
packet_add((struct pool *)&seq->p, &data);
}
--
2.49.0