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Dynamic bootstrap of kademlia peers

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Will be using config file instead of hard coded bootstrap addresses
This commit is contained in:
John Jones 2017-03-24 16:50:02 -05:00
parent 158012858a
commit db0f62cee4
2 changed files with 41 additions and 15 deletions
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5
include/libp2p/routing/kademlia.h
View file

@ -1,9 +1,10 @@
#pragma once
#include "libp2p/utils/vector.h"
#include "multiaddr/multiaddr.h"
int start_kademlia(int sock, int family, char* peer_id, int timeout);
int start_kademlia_multiaddress(struct MultiAddress* multiaddress, char* peer_id, int timeout);
int start_kademlia(int sock, int family, char* peer_id, int timeout, struct Libp2pVector* bootstrap_addresses);
int start_kademlia_multiaddress(struct MultiAddress* multiaddress, char* peer_id, int timeout, struct Libp2pVector* bootstrap_addresses);
void stop_kademlia (void);
void *kademlia_thread (void *ptr);

45
routing/kademlia.c
View file

@ -29,7 +29,6 @@ struct bs_struct {
char *ip;
uint16_t port;
} bootstrap_list[] = {
{ "192.210.179.217", 5001 }
};
pthread_t pth_kademlia, pth_announce;
@ -166,19 +165,29 @@ static void callback(void *closure, int event, const unsigned char *info_hash, c
}
}
int start_kademlia_multiaddress(struct MultiAddress* address, char* peer_id, int timeout) {
int start_kademlia_multiaddress(struct MultiAddress* address, char* peer_id, int timeout, struct Libp2pVector* bootstrap_addresses) {
int port = multiaddress_get_ip_port(address);
int family = multiaddress_get_ip_family(address);
int fd = socket(family, SOCK_STREAM, 0);
int fd = socket(family, SOCK_DGRAM, 0);
if (fd < 0)
return 0;
struct sockaddr_in serv_addr;
serv_addr.sin_family = family;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = port;
bind (fd, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
return start_kademlia(fd, family, peer_id, timeout);
if (bind(fd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) != 0)
return 0;
return start_kademlia(fd, family, peer_id, timeout, bootstrap_addresses);
}
int start_kademlia(int net_fd, int family, char* peer_id, int timeout)
/***
* Start the kademlia service
* @param net_fd the file descriptor of the address/socket already bound
* @param family ip4 or ip6
* @param peer_id the first 20 chars of the public PeerID in a null terminated string
* @param timeout seconds before a select() timeout
*/
int start_kademlia(int net_fd, int family, char* peer_id, int timeout, struct Libp2pVector* bootstrap_addresses)
{
int rc, i, len;
unsigned char id[sizeof hash];
@ -186,26 +195,41 @@ int start_kademlia(int net_fd, int family, char* peer_id, int timeout)
dht_debug = stderr;
len = sizeof(bootstrap_list) / sizeof(bootstrap_list[0]); // array length
len = bootstrap_addresses->total;
if (len > MAX_BOOTSTRAP_NODES) {
len = MAX_BOOTSTRAP_NODES; // limit array length
}
memset(&sa, 0, sizeof sa);
char* ip = NULL;
for (i = 0 ; i < len ; i++) {
if (family == AF_INET6 && inet_pton(AF_INET6, bootstrap_list[i].ip, &(sa.sin_addr.s_addr)) == 1) {
struct MultiAddress* addr = (struct MultiAddress*)libp2p_utils_vector_get(bootstrap_addresses, i);
if (ip != NULL)
free(ip);
if (multiaddress_is_ip(addr)) {
multiaddress_get_ip_address(addr, &ip);
if (family == AF_INET6 && multiaddress_is_ip6(addr)) {
if (inet_pton(AF_INET6, ip, &(sa.sin_addr.s_addr)) == 1)
sa.sin_family = AF_INET6;
} else if (inet_pton(AF_INET, bootstrap_list[i].ip, &(sa.sin_addr.s_addr)) == 1) {
else
continue;
} else {
if (inet_pton(AF_INET , ip, &(sa.sin_addr.s_addr)) == 1)
sa.sin_family = AF_INET;
else
continue;
}
} else {
continue; // not an ipv6 or ipv4?
}
sa.sin_port = htons (bootstrap_list[i].port);
sa.sin_port = htons (multiaddress_get_ip_port(addr));
memcpy(&bootstrap_nodes[num_bootstrap_nodes++], &sa, sizeof(sa));
}
if (ip != NULL)
free(ip);
dht_hash (id, sizeof(id), peer_id, strlen(peer_id), NULL, 0, NULL, 0);
@ -299,6 +323,7 @@ void *kademlia_thread (void *ptr)
continue;
} else {
fprintf(stderr, "kademlia_thread:recvfrom failed with %d\n", errno);
continue;
}
}
buf[rc] = '\0';