sstp: implement proxy-protocol 1 & 2 support

1 files changed, 74 insertions, 0 deletions

diff --git a/accel-pppd/ctrl/sstp/proxy_prot.h b/accel-pppd/ctrl/sstp/proxy_prot.h
new file mode 100644
index 0000000..bada8aa
--- /dev/null
+++ b/accel-pppd/ctrl/sstp/proxy_prot.h
@@ -0,0 +1,74 @@
+#ifndef PROXY_PROT_H
+#define PROXY_PROT_H
+
+#include <stdint.h>
+#include <string.h>
+#include <netinet/in.h>
+
+#define PROXY_SIG		{ 'P', 'R', 'O', 'X', 'Y' }
+#define PROXY_MINLEN		8
+#define PROXY_TCP4		"TCP4"
+#define PROXY_TCP6		"TCP6"
+#define PROXY_UNKNOWN		"UNKNOWN"
+
+#define PROXY2_SIG		{ 0x0d, 0x0a, 0x0d, 0x0a, 0x00, 0x0d, 0x0a, 0x51, 0x55, 0x49, 0x54, 0x0a }
+#define PROXY2_MINLEN		16
+#define PROXY2_LOCAL		0
+#define PROXY2_PROXY		1
+#define PROXY2_AF_UNSPEC	0
+#define PROXY2_AF_INET		1
+#define PROXY2_AF_INET6		2
+#define PROXY2_AF_UNIX		3
+#define PROXY2_UNSPEC		0
+#define PROXY2_STREAM		1
+#define PROXY2_DGRAM		2
+
+struct proxy_hdr {
+	char line[108];
+} __attribute__((packed));
+
+struct proxy2_ipv4 {
+	struct in_addr src_addr;
+	struct in_addr dst_addr;
+	uint16_t src_port;
+	uint16_t dst_port;
+} __attribute__((packed));
+
+struct proxy2_ipv6 {
+	struct in6_addr src_addr;
+	struct in6_addr dst_addr;
+	uint16_t src_port;
+	uint16_t dst_port;
+} __attribute__((packed));
+
+struct proxy2_unix {
+	char src_addr[108];
+	char dst_addr[108];
+} __attribute__((packed));
+
+union proxy2_addr {
+	struct proxy2_ipv4 ipv4_addr;
+	struct proxy2_ipv6 ipv6_addr;
+	struct proxy2_unix unix_addr;
+};
+
+struct proxy2_hdr {
+	uint8_t sig[12];	/* hex 0D 0A 0D 0A 00 0D 0A 51 55 49 54 0A */
+	uint8_t ver_cmd;	/* protocol version and command */
+	uint8_t fam;		/* protocol family and address */
+	uint16_t len;		/* number of following bytes part of the header */
+	union proxy2_addr __addr[0];
+#define ipv4_addr __addr[0].ipv4_addr
+#define ipv6_addr __addr[0].ipv6_addr
+#define unix_addr __addr[0].unix_addr
+} __attribute__((packed));
+
+struct BUG_bad_sizeof_proxy_hdr {
+	uint8_t proxy_hdr[sizeof(struct proxy_hdr) < PROXY_MINLEN ? -1 : 0 ];
+};
+
+struct BUG_bad_sizeof_proxy2_hdr {
+	uint8_t proxy2_hdr[sizeof(struct proxy2_hdr) != PROXY2_MINLEN ? -1 : 0 ];
+};
+
+#endif