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refactor: update packet get layer/tunnel API

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This commit is contained in:
luwenpeng
2024-08-21 11:55:06 +08:00
parent 1aece166cd
commit a0fb57e843
7 changed files with 151 additions and 171 deletions
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36
include/stellar/layer.h
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@@ -70,26 +70,24 @@ struct layer
};
int packet_get_layer_count(const struct packet *pkt);
// return 0: success 
// return -1: failed
int packet_get_layer_by_idx(const struct packet *pkt, int idx, struct layer *out);
const struct layer *packet_get_layer_by_idx(const struct packet *pkt, int idx);
#define PACKET_FOREACH_LAYER_INORDER(pkt, layer) \
for (int i = 0; i < packet_get_layer_count(pkt) && packet_get_layer_by_idx(pkt, i, &layer) == 0; i++)
#define PACKET_FOREACH_LAYER_REVERSE(pkt, layer) \
for (int i = packet_get_layer_count(pkt) - 1; i >= 0 && packet_get_layer_by_idx(pkt, i, &layer) == 0; i--)
#define PACKET_GETALL_LAYERS(pkt, layers) \
({ \
memset(layers, 0, sizeof(layers)); \
int size = sizeof(layers) / sizeof(layers[0]); \
int count = packet_get_layer_count(pkt); \
int num = count > size ? size : count; \
for (int i = 0; i < num && packet_get_layer_by_idx(pkt, i, &layers[i]) == 0; i++) \
/* void */; \
num; \
})
// // example: foreach layer in packet (inorder)
// int count = packet_get_layer_count(pkt);
// for (int i = 0; i < count; i++)
// {
// const struct layer *layer = packet_get_layer_by_idx(pkt, i);
// // do something with layer
// }
//
//
// // example: foreach layer in packet (reverse)
// int count = packet_get_layer_count(pkt);
// for (int i = count - 1; i >= 0; i--)
// {
// const struct layer *layer = packet_get_layer_by_idx(pkt, i);
// // do something with layer
// }
#ifdef __cplusplus
}