An upcoming commit will add another user.
---
lib/packets.c | 25 +++++++++++++++++++++++++
lib/packets.h | 2 ++
ofproto/ofproto-dpif.c | 12 ++++--------
3 files changed, 31 insertions(+), 8 deletions(-)
diff --git a/lib/packets.c b/lib/packets.c
index 46a44bd..b9f37bb 100644
--- a/lib/packets.c
+++ b/lib/packets.c
@@ -121,6 +121,31 @@ eth_pop_vlan(struct ofpbuf *packet)
}
}
+/* Converts hex digits in 'hex' to an Ethernet packet in '*packetp'. The
+ * caller must free '*packetp'. On success, returns NULL. On failure, returns
+ * an error message and stores NULL in '*packetp'. */
+const char *
+eth_from_hex(const char *hex, struct ofpbuf **packetp)
+{
+ struct ofpbuf *packet;
+
+ packet = *packetp = ofpbuf_new(strlen(hex) / 2);
+
+ if (ofpbuf_put_hex(packet, hex, NULL)[0] != '\0') {
+ ofpbuf_delete(packet);
+ *packetp = NULL;
+ return "Trailing garbage in packet data";
+ }
+
+ if (packet->size < ETH_HEADER_LEN) {
+ ofpbuf_delete(packet);
+ *packetp = NULL;
+ return "Packet data too short for Ethernet";
+ }
+
+ return NULL;
+}
+
/* Given the IP netmask 'netmask', returns the number of bits of the IP address
* that it specifies, that is, the number of 1-bits in 'netmask'. 'netmask'
* must be a CIDR netmask (see ip_is_cidr()). */
diff --git a/lib/packets.h b/lib/packets.h
index 439a7dd..9e283a5 100644
--- a/lib/packets.h
+++ b/lib/packets.h
@@ -134,6 +134,8 @@ void compose_benign_packet(struct ofpbuf *, const char *tag,
void eth_push_vlan(struct ofpbuf *, ovs_be16 tci);
void eth_pop_vlan(struct ofpbuf *);
+const char *eth_from_hex(const char *hex, struct ofpbuf **packetp);
+
/* Example:
*
* uint8_t mac[ETH_ADDR_LEN];
diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
index 88bc620..6bc2a25 100644
--- a/ofproto/ofproto-dpif.c
+++ b/ofproto/ofproto-dpif.c
@@ -5632,15 +5632,11 @@ ofproto_unixctl_trace(struct unixctl_conn *conn, int
argc, const char *argv[],
uint16_t in_port = ofp_port_to_odp_port(atoi(in_port_s));
ovs_be64 tun_id = htonll(strtoull(tun_id_s, NULL, 0));
uint32_t priority = atoi(priority_s);
+ const char *msg;
- packet = ofpbuf_new(strlen(packet_s) / 2);
- if (ofpbuf_put_hex(packet, packet_s, NULL)[0] != '\0') {
- unixctl_command_reply(conn, 501, "Trailing garbage in command");
- goto exit;
- }
- if (packet->size < ETH_HEADER_LEN) {
- unixctl_command_reply(conn, 501,
- "Packet data too short for Ethernet");
+ msg = eth_from_hex(packet_s, &packet);
+ if (msg) {
+ unixctl_command_reply(conn, 501, msg);
goto exit;
}
--
1.7.4.4
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