An implementation of the Chord peer-to-peer lookup service in C.
node_t *triad_init(const char *ip)
Initializes a new node structure for the given IP address that is used for subsequent API calls.
int triad_join(node_t *n, const char *ip)
Joins the node n to the Chord ring that the node at ip is already connected to. If ip is n's IP address, then a new Chord ring is started at ip, with n as its sole member.
char *triad_lookup(node_t *n, unsigned int id)
Looks up the IP address of the node that id is located on, in the Chord ring that n has joined to.
int triad_leave(node_t *n)
Leaves the Chord ring that n is a member of. This is necessary for correctly updating the state of the other nodes in the ring.
int triad_deinit(node_t *n)
Releases any allocated resources and joins any threads used by n.
char local = "192.168.1.7"; // this node's IP address char remote = "192.168.1.8"; // the IP address of a node that has already joined a Chord ring int start_new = 0; // whether to start a new Chord ring or join an existing one node_t *n = triad_init(local); if (start_new) triad_join(n, local); else triad_join(n, remote); printf("12345678 => %s\n", triad_lookup(n, 12345678)); triad_leave(n); triad_deinit(n);