Separated lib in two parts : low level and high level.

[ngadmin] / raw / include / protocol.h

diff --git a/raw/include/protocol.h b/raw/include/protocol.h
new file mode 100644 (file)
index 0000000..3064fd4
--- /dev/null
+++ b/raw/include/protocol.h
@@ -0,0 +1,157 @@
+
+#ifndef DEF_PROTOCOL
+#define DEF_PROTOCOL
+
+
+#include <stdlib.h>
+#include <arpa/inet.h>
+
+#include <netinet/ether.h>
+
+#include "list.h"
+
+
+#define CLIENT_PORT            63321
+#define SWITCH_PORT            63322
+
+#define CODE_READ_REQ          1
+#define CODE_READ_REP          2
+#define CODE_WRITE_REQ         3
+#define CODE_WRITE_REP         4
+
+#define ERROR_READONLY         3
+#define ERROR_INVALID_VALUE    5
+#define ERROR_DENIED           7
+
+
+struct ng_header {
+       char version;                   /* always 1, maybe version */
+       char code;                      /* request code: read request, read reply, write request, write reply */
+       unsigned char error;            /* error code, 0 when no error */
+       unsigned char unk1;             /* always 0, unknown */
+       unsigned short attr;            /* attribute code which caused error, 0 when no error */
+       char unk2[2];                   /* always 0, unknown */
+       char client_mac[ETH_ALEN];      /* client MAC address */
+       char switch_mac[ETH_ALEN];      /* switch MAC address */
+       unsigned int seqnum;            /* sequence number */
+       char proto_id[4];               /* always "NSDP", maybe short for "Netgear Switch Description Protocol" */
+       char unk3[4];                   /* always 0, unknown */
+       char data[0];
+} __attribute__((packed));
+
+
+struct attr_header {
+       unsigned short attr;
+       unsigned short size;
+       char data[0];
+} __attribute__((packed));
+
+
+struct ng_packet {
+       union {
+               char *buffer;
+               struct ng_header *nh;
+       };
+       int maxlen;
+       struct attr_header *ah;
+};
+
+
+struct attr {
+       unsigned short attr;
+       unsigned short size;
+       void *data;
+};
+
+
+
+int trim (char *txt, int start);
+
+
+static inline int min (int a, int b)
+{
+       return a < b ? a : b;
+}
+
+
+void initNgHeader (struct ng_header *nh, char code, const struct ether_addr *client_mac, const struct ether_addr *switch_mac, unsigned int seqnum);
+
+
+bool validateNgHeader (const struct ng_header *nh, char code, const struct ether_addr *client_mac, const struct ether_addr *switch_mac, unsigned int seqnum);
+
+
+static inline void initNgPacket (struct ng_packet *np)
+{
+       np->ah = (struct attr_header*)np->nh->data;
+}
+
+
+void addPacketAttr (struct ng_packet *np, struct attr *at);
+
+
+static inline int getPacketTotalSize (const struct ng_packet *np)
+{
+       return ((char*)np->ah) - np->buffer;
+}
+
+
+struct attr* newAttr (unsigned short attr, unsigned short size, void *data);
+
+
+static inline struct attr* newEmptyAttr (unsigned short attr)
+{
+       return newAttr(attr, 0, NULL);
+}
+
+
+static inline struct attr* newByteAttr (unsigned short attr, unsigned char value)
+{
+       char *v = malloc(sizeof(char));
+       
+       *v = value;
+       
+       return newAttr(attr, sizeof(char), v);
+}
+
+
+static inline struct attr* newShortAttr (unsigned short attr, short value)
+{
+       short *v = malloc(sizeof(short));
+       
+       *v = value;
+       
+       return newAttr(attr, sizeof(short), v);
+}
+
+
+static inline struct attr* newIntAttr (unsigned short attr, int value)
+{
+       int *v = malloc(sizeof(int));
+       
+       *v = value;
+       
+       return newAttr(attr, sizeof(int), v);
+}
+
+
+static inline struct attr* newAddrAttr (unsigned short attr, struct in_addr value)
+{
+       struct in_addr *v = malloc(sizeof(struct in_addr));
+       
+       *v = value;
+       
+       return newAttr(attr, sizeof(struct in_addr), v);
+}
+
+
+void freeAttr (struct attr *at);
+
+
+int addPacketAttributes (struct ng_packet *np, const List* attr, unsigned char ports);
+
+
+int extractPacketAttributes (struct ng_packet *np, unsigned char *error, unsigned short *attr_error, List *attr, unsigned short filter_attr, unsigned char ports);
+
+
+#endif
+