2024-06-19 15:06:14 +08:00
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#pragma once
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2024-06-17 11:41:21 +08:00
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include "layer.h"
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enum tunnel_type
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{
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2024-06-19 14:43:32 +08:00
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TUNNEL_IPV4 = 1, // contain layers: IPv4, (next inner layer must be IPv4 / IPv6)
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TUNNEL_IPV6 = 2, // contain layers: IPv6, (next inner layer must be IPv4 / IPv6)
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TUNNEL_GRE = 3, // contain layers: IPv4 + GRE
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// contain layers: IPv6 + GRE
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TUNNEL_GTP = 4, // contain layers: IPv4 + UDP + GTP
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// contain layers: IPv6 + UDP + GTP
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TUNNEL_VXLAN = 5, // contain layers: IPv4 + UDP + VXLAN
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// contain layers: IPv6 + UDP + VXLAN
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TUNNEL_L2TP = 6, // contain layers: IPv4 + UDP + L2TP
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// contain layers: IPv6 + UDP + L2TP
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TUNNEL_TEREDO = 7, // contain layers: IPv4 + UDP, (next inner layer must be IPv6)
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2024-06-17 11:41:21 +08:00
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};
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#define MAX_LAYERS_PER_TUNNEL 3
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struct tunnel
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{
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enum tunnel_type type;
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2024-06-19 14:43:32 +08:00
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int layer_count;
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2024-06-17 11:41:21 +08:00
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struct layer layers[MAX_LAYERS_PER_TUNNEL];
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};
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int packet_get_tunnel_count(const struct packet *pkt);
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// return 0: success
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// return -1: failed
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2024-06-19 14:43:32 +08:00
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int packet_get_tunnel_by_idx(const struct packet *pkt, int idx, struct tunnel *out);
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2024-06-17 11:41:21 +08:00
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#define PACKET_FOREACH_TUNNEL_INORDER(pkt, tunnel) \
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2024-06-19 14:43:32 +08:00
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for (int i = 0; i < packet_get_tunnel_count(pkt) && packet_get_tunnel_by_idx(pkt, i, &tunnel) == 0; i++)
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2024-06-17 11:41:21 +08:00
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#define PACKET_FOREACH_TUNNEL_REVERSE(pkt, tunnel) \
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2024-06-19 14:43:32 +08:00
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for (int i = packet_get_tunnel_count(pkt) - 1; i >= 0 && packet_get_tunnel_by_idx(pkt, i, &tunnel) == 0; i--)
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2024-06-17 11:41:21 +08:00
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2024-07-01 14:17:07 +08:00
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#define PACKET_GETALL_TUNNELS(pkt, tunnels) \
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({ \
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memset(tunnels, 0, sizeof(tunnels)); \
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int size = sizeof(tunnels) / sizeof(tunnels[0]); \
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int count = packet_get_tunnel_count(pkt); \
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int num = count > size ? size : count; \
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for (int i = 0; i < num && packet_get_tunnel_by_idx(pkt, i, &tunnels[i]) == 0; i++) \
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/* void */; \
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num; \
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})
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2024-06-17 11:41:21 +08:00
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#ifdef __cplusplus
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}
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#endif
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