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bugfix: GTP-U only header no payload

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This commit is contained in:
luwenpeng
2024-10-23 14:34:20 +08:00
parent 3d4e6a2cd5
commit 99d933bd8d
1 changed files with 35 additions and 21 deletions
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56
infra/packet_manager/packet_parser.c
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@@ -819,30 +819,44 @@ static inline const char *parse_gtp_u(struct packet *pkt, const char *data, uint
return data;
}
uint8_t next_proto = (((const uint8_t *)(data + hdr_len))[0]) >> 4;
if (next_proto != 4 && next_proto != 6)
if (hdr_len == len)
{
// next_proto is not IPv4 or IPv6, this is not a normal GTP-U packet, fallback to UDP
return data;
}
struct layer_private *layer = get_free_layer(pkt);
if (unlikely(layer == NULL))
{
return data;
}
SET_LAYER(pkt, layer, LAYER_PROTO_GTP_U, hdr_len, data, len, 0);
switch (next_proto)
{
case 4:
return parse_ipv4(pkt, layer->pld_ptr, layer->pld_len);
case 6:
return parse_ipv6(pkt, layer->pld_ptr, layer->pld_len);
default:
PACKET_LOG_UNSUPPORT_PROTO(pkt, LAYER_PROTO_GTP_U, next_proto);
// only GTP-U header, no payload
struct layer_private *layer = get_free_layer(pkt);
if (unlikely(layer == NULL))
{
return data;
}
SET_LAYER(pkt, layer, LAYER_PROTO_GTP_U, hdr_len, data, len, 0);
return layer->pld_ptr;
}
else
{
uint8_t next_proto = (((const uint8_t *)(data + hdr_len))[0]) >> 4;
if (next_proto != 4 && next_proto != 6)
{
// next_proto is not IPv4 or IPv6, this is not a normal GTP-U packet, fallback to UDP
return data;
}
struct layer_private *layer = get_free_layer(pkt);
if (unlikely(layer == NULL))
{
return data;
}
SET_LAYER(pkt, layer, LAYER_PROTO_GTP_U, hdr_len, data, len, 0);
switch (next_proto)
{
case 4:
return parse_ipv4(pkt, layer->pld_ptr, layer->pld_len);
case 6:
return parse_ipv6(pkt, layer->pld_ptr, layer->pld_len);
default:
PACKET_LOG_UNSUPPORT_PROTO(pkt, LAYER_PROTO_GTP_U, next_proto);
return layer->pld_ptr;
}
}
}
static inline const char *parse_gtp_c(struct packet *pkt, const char *data, uint16_t len)