"Fossies" - the Fresh Open Source Software Archive  

Source code changes of the file "src/edge_management.c" between
n2n-3.0.tar.gz and n2n-3.1.1.tar.gz

About: n2n is a layer-two peer-to-peer virtual private network (VPN) which allows bypassing intermediate firewalls.
Pre-release.

edge_management.c  (n2n-3.0):edge_management.c  (n2n-3.1.1)
/** /**
* (C) 2007-21 - ntop.org and contributors * (C) 2007-22 - ntop.org and contributors
* *
* This program is free software; you can redistribute it and/or modify * This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by * it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or * the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version. * (at your option) any later version.
* *
* This program is distributed in the hope that it will be useful, * This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of * but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details. * GNU General Public License for more details.
* *
* You should have received a copy of the GNU General Public License * You should have received a copy of the GNU General Public License
* along with this program; if not see see <http://www.gnu.org/licenses/> * along with this program; if not see see <http://www.gnu.org/licenses/>
* *
*/ */
#include "n2n.h" #include "n2n.h"
#include "edge_utils_win32.h" #include "edge_utils_win32.h"
typedef struct strbuf {
size_t size;
char str[];
} strbuf_t;
#define STRBUF_INIT(buf,p) do { \
buf = (void *)p; \
buf->size = sizeof(*p) - sizeof(size_t); \
} while(0)
enum n2n_mgmt_type {
N2N_MGMT_UNKNOWN = 0,
N2N_MGMT_READ = 1,
N2N_MGMT_WRITE = 2,
N2N_MGMT_SUB = 3,
};
/*
* Everything needed to reply to a request
*/
typedef struct mgmt_req {
n2n_edge_t *eee;
enum n2n_mgmt_type type;
char tag[10];
struct sockaddr_in sender_sock;
} mgmt_req_t;
/*
* Read/Write handlers are defined in this structure
*/
#define FLAG_WROK 1 #define FLAG_WROK 1
typedef struct n2n_mgmt_handler { typedef struct mgmt_handler {
int flags; int flags;
char *cmd; char *cmd;
char *help; char *help;
void (*func)(n2n_edge_t *eee, char *udp_buf, struct sockaddr_in sender_sock, void (*func)(mgmt_req_t *req, strbuf_t *buf, char *argv0, char *argv);
enum n2n_mgmt_type type, char *tag, char *argv0, char *argv); } mgmt_handler_t;
} n2n_mgmt_handler_t;
static void mgmt_error (n2n_edge_t *eee, char *udp_buf, const struct sockaddr_in /*
sender_sock, char *tag, char *msg) { * Event topic names are defined in this structure
size_t msg_len; */
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, typedef struct mgmt_events {
"{" enum n2n_event_topic topic;
"\"_tag\":\"%s\"," char *cmd;
"\"_type\":\"error\"," char *help;
"\"error\":\"%s\"}\n", } mgmt_events_t;
tag,
msg); // Lookup the index of matching argv0 in a cmd list
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, // store index in "Result", or -1 for not found
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in)); #define lookup_handler(Result, list, argv0) do { \
int nr_max = sizeof(list) / sizeof(list[0]); \
for( Result=0; Result < nr_max; Result++ ) { \
if(0 == strcmp(list[Result].cmd, argv0)) { \
break; \
} \
} \
if( Result >= nr_max ) { \
Result = -1; \
} \
} while(0)
ssize_t send_reply (mgmt_req_t *req, strbuf_t *buf, size_t msg_len) {
// TODO: better error handling (counters?)
return sendto(req->eee->udp_mgmt_sock, buf->str, msg_len, 0,
(struct sockaddr *) &req->sender_sock, sizeof(struct sockaddr_
in));
}
size_t gen_json_1str (strbuf_t *buf, char *tag, char *_type, char *key, char *va
l) {
return snprintf(buf->str, buf->size,
"{"
"\"_tag\":\"%s\","
"\"_type\":\"%s\","
"\"%s\":\"%s\"}\n",
tag,
_type,
key,
val);
}
size_t gen_json_1uint (strbuf_t *buf, char *tag, char *_type, char *key, unsigne
d int val) {
return snprintf(buf->str, buf->size,
"{"
"\"_tag\":\"%s\","
"\"_type\":\"%s\","
"\"%s\":%u}\n",
tag,
_type,
key,
val);
}
static void send_json_1str (mgmt_req_t *req, strbuf_t *buf, char *_type, char *k
ey, char *val) {
size_t msg_len = gen_json_1str(buf, req->tag, _type, key, val);
send_reply(req, buf, msg_len);
}
static void send_json_1uint (mgmt_req_t *req, strbuf_t *buf, char *_type, char *
key, unsigned int val) {
size_t msg_len = gen_json_1uint(buf, req->tag, _type, key, val);
send_reply(req, buf, msg_len);
} }
static void mgmt_stop (n2n_edge_t *eee, char *udp_buf, const struct sockaddr_in size_t event_debug (strbuf_t *buf, char *tag, int data0, void *data1) {
sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) { traceEvent(TRACE_DEBUG, "Unexpected call to event_debug");
size_t msg_len; return 0;
}
if(type==N2N_MGMT_WRITE) { size_t event_test (strbuf_t *buf, char *tag, int data0, void *data1) {
*eee->keep_running = 0; size_t msg_len = gen_json_1str(buf, tag, "event", "test", (char *)data1);
} return msg_len;
}
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, size_t event_peer (strbuf_t *buf, char *tag, int data0, void *data1) {
"{" int action = data0;
"\"_tag\":\"%s\"," struct peer_info *peer = (struct peer_info *)data1;
"\"_type\":\"row\","
"\"keep_running\":%u}\n",
tag,
*eee->keep_running);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, macstr_t mac_buf;
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in)); n2n_sock_str_t sockbuf;
/*
* Just the peer_info bits that are needed for lookup (maccaddr) or
* firewall and routing (sockaddr)
* If needed, other details can be fetched via the edges method call.
*/
return snprintf(buf->str, buf->size,
"{"
"\"_tag\":\"%s\","
"\"_type\":\"event\","
"\"action\":%i,"
"\"macaddr\":\"%s\","
"\"sockaddr\":\"%s\"}\n",
tag,
action,
(is_null_mac(peer->mac_addr)) ? "" : macaddr_str(mac_buf, pe
er->mac_addr),
sock_to_cstr(sockbuf, &(peer->sock)));
} }
static void mgmt_verbose (n2n_edge_t *eee, char *udp_buf, const struct sockaddr_ static void mgmt_error (mgmt_req_t *req, strbuf_t *buf, char *msg) {
in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) { send_json_1str(req, buf, "error", "error", msg);
size_t msg_len; }
static void mgmt_stop (mgmt_req_t *req, strbuf_t *buf, char *argv0, char *argv)
{
if(req->type==N2N_MGMT_WRITE) {
*req->eee->keep_running = 0;
}
send_json_1uint(req, buf, "row", "keep_running", *req->eee->keep_running);
}
if(type==N2N_MGMT_WRITE) { static void mgmt_verbose (mgmt_req_t *req, strbuf_t *buf, char *argv0, char *arg
v) {
if(req->type==N2N_MGMT_WRITE) {
if(argv) { if(argv) {
setTraceLevel(strtoul(argv, NULL, 0)); setTraceLevel(strtoul(argv, NULL, 0));
} }
} }
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, send_json_1uint(req, buf, "row", "traceLevel", getTraceLevel());
"{"
"\"_tag\":\"%s\","
"\"_type\":\"row\","
"\"traceLevel\":%u}\n",
tag,
getTraceLevel());
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
} }
static void mgmt_communities (n2n_edge_t *eee, char *udp_buf, const struct socka static void mgmt_communities (mgmt_req_t *req, strbuf_t *buf, char *argv0, char
ddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) *argv) {
{
size_t msg_len;
if(eee->conf.header_encryption != HEADER_ENCRYPTION_NONE) { if(req->eee->conf.header_encryption != HEADER_ENCRYPTION_NONE) {
mgmt_error(eee, udp_buf, sender_sock, tag, "noaccess"); mgmt_error(req, buf, "noaccess");
return; return;
} }
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, send_json_1str(req, buf, "row", "community", (char *)req->eee->conf.communit
"{" y_name);
"\"_tag\":\"%s\","
"\"_type\":\"row\","
"\"community\":\"%s\"}",
tag,
eee->conf.community_name);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
} }
static void mgmt_supernodes (n2n_edge_t *eee, char *udp_buf, const struct sockad dr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) { static void mgmt_supernodes (mgmt_req_t *req, strbuf_t *buf, char *argv0, char * argv) {
size_t msg_len; size_t msg_len;
struct peer_info *peer, *tmpPeer; struct peer_info *peer, *tmpPeer;
macstr_t mac_buf; macstr_t mac_buf;
n2n_sock_str_t sockbuf; n2n_sock_str_t sockbuf;
selection_criterion_str_t sel_buf; selection_criterion_str_t sel_buf;
HASH_ITER(hh, eee->conf.supernodes, peer, tmpPeer) { HASH_ITER(hh, req->eee->conf.supernodes, peer, tmpPeer) {
/* /*
* TODO: * TODO:
* The version string provided by the remote supernode could contain * The version string provided by the remote supernode could contain
* chars that make our JSON invalid. * chars that make our JSON invalid.
* - do we care? * - do we care?
*/ */
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, msg_len = snprintf(buf->str, buf->size,
"{" "{"
"\"_tag\":\"%s\"," "\"_tag\":\"%s\","
"\"_type\":\"row\"," "\"_type\":\"row\","
"\"version\":\"%s\"," "\"version\":\"%s\","
"\"purgeable\":%i," "\"purgeable\":%i,"
"\"current\":%i," "\"current\":%i,"
"\"macaddr\":\"%s\"," "\"macaddr\":\"%s\","
"\"sockaddr\":\"%s\"," "\"sockaddr\":\"%s\","
"\"selection\":\"%s\"," "\"selection\":\"%s\","
"\"last_seen\":%li," "\"last_seen\":%li,"
"\"uptime\":%li}\n", "\"uptime\":%li}\n",
tag, req->tag,
peer->version, peer->version,
peer->purgeable, peer->purgeable,
(peer == eee->curr_sn) ? (eee->sn_wait ? 2 : 1 ) : 0, (peer == req->eee->curr_sn) ? (req->eee->sn_wait ? 2 : 1 ) : 0,
is_null_mac(peer->mac_addr) ? "" : macaddr_str(mac_bu f, peer->mac_addr), is_null_mac(peer->mac_addr) ? "" : macaddr_str(mac_bu f, peer->mac_addr),
sock_to_cstr(sockbuf, &(peer->sock)), sock_to_cstr(sockbuf, &(peer->sock)),
sn_selection_criterion_str(eee, sel_buf, peer), sn_selection_criterion_str(req->eee, sel_buf, peer),
peer->last_seen, peer->last_seen,
peer->uptime); peer->uptime);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, send_reply(req, buf, msg_len);
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
} }
} }
static void mgmt_edges_row (n2n_edge_t *eee, char *udp_buf, const struct sockadd r_in sender_sock, char *tag, struct peer_info *peer, char *mode) { static void mgmt_edges_row (mgmt_req_t *req, strbuf_t *buf, struct peer_info *pe er, char *mode) {
size_t msg_len; size_t msg_len;
macstr_t mac_buf; macstr_t mac_buf;
n2n_sock_str_t sockbuf; n2n_sock_str_t sockbuf;
dec_ip_bit_str_t ip_bit_str = {'\0'}; dec_ip_bit_str_t ip_bit_str = {'\0'};
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, msg_len = snprintf(buf->str, buf->size,
"{" "{"
"\"_tag\":\"%s\"," "\"_tag\":\"%s\","
"\"_type\":\"row\"," "\"_type\":\"row\","
"\"mode\":\"%s\"," "\"mode\":\"%s\","
"\"ip4addr\":\"%s\"," "\"ip4addr\":\"%s\","
"\"purgeable\":%i," "\"purgeable\":%i,"
"\"local\":%i," "\"local\":%i,"
"\"macaddr\":\"%s\"," "\"macaddr\":\"%s\","
"\"sockaddr\":\"%s\"," "\"sockaddr\":\"%s\","
"\"desc\":\"%s\"," "\"desc\":\"%s\","
"\"last_p2p\":%li,\n" "\"last_p2p\":%li,\n"
"\"last_sent_query\":%li,\n" "\"last_sent_query\":%li,\n"
"\"last_seen\":%li}\n", "\"last_seen\":%li}\n",
tag, req->tag,
mode, mode,
(peer->dev_addr.net_addr == 0) ? "" : ip_subnet_to_str(ip _bit_str, &peer->dev_addr), (peer->dev_addr.net_addr == 0) ? "" : ip_subnet_to_str(ip _bit_str, &peer->dev_addr),
peer->purgeable, peer->purgeable,
peer->local, peer->local,
(is_null_mac(peer->mac_addr)) ? "" : macaddr_str(mac_buf, peer->mac_addr), (is_null_mac(peer->mac_addr)) ? "" : macaddr_str(mac_buf, peer->mac_addr),
sock_to_cstr(sockbuf, &(peer->sock)), sock_to_cstr(sockbuf, &(peer->sock)),
peer->dev_desc, peer->dev_desc,
peer->last_p2p, peer->last_p2p,
peer->last_sent_query, peer->last_sent_query,
peer->last_seen); peer->last_seen);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0 /*flags*/, send_reply(req, buf, msg_len);
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
} }
static void mgmt_edges (n2n_edge_t *eee, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) { static void mgmt_edges (mgmt_req_t *req, strbuf_t *buf, char *argv0, char *argv) {
struct peer_info *peer, *tmpPeer; struct peer_info *peer, *tmpPeer;
// dump nodes with forwarding through supernodes // dump nodes with forwarding through supernodes
HASH_ITER(hh, eee->pending_peers, peer, tmpPeer) { HASH_ITER(hh, req->eee->pending_peers, peer, tmpPeer) {
mgmt_edges_row(eee, udp_buf, sender_sock, tag, peer, "pSp"); mgmt_edges_row(req, buf, peer, "pSp");
} }
// dump peer-to-peer nodes // dump peer-to-peer nodes
HASH_ITER(hh, eee->known_peers, peer, tmpPeer) { HASH_ITER(hh, req->eee->known_peers, peer, tmpPeer) {
mgmt_edges_row(eee, udp_buf, sender_sock, tag, peer, "p2p"); mgmt_edges_row(req, buf, peer, "p2p");
} }
} }
static void mgmt_timestamps (n2n_edge_t *eee, char *udp_buf, const struct sockad dr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) { static void mgmt_timestamps (mgmt_req_t *req, strbuf_t *buf, char *argv0, char * argv) {
size_t msg_len; size_t msg_len;
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, msg_len = snprintf(buf->str, buf->size,
"{" "{"
"\"_tag\":\"%s\"," "\"_tag\":\"%s\","
"\"_type\":\"row\"," "\"_type\":\"row\","
"\"start_time\":%lu," "\"start_time\":%lu,"
"\"last_super\":%ld," "\"last_super\":%ld,"
"\"last_p2p\":%ld}\n", "\"last_p2p\":%ld}\n",
tag, req->tag,
eee->start_time, req->eee->start_time,
eee->last_sup, req->eee->last_sup,
eee->last_p2p); req->eee->last_p2p);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, send_reply(req, buf, msg_len);
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
} }
static void mgmt_packetstats (n2n_edge_t *eee, char *udp_buf, const struct socka ddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) { static void mgmt_packetstats (mgmt_req_t *req, strbuf_t *buf, char *argv0, char *argv) {
size_t msg_len; size_t msg_len;
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, msg_len = snprintf(buf->str, buf->size,
"{" "{"
"\"_tag\":\"%s\"," "\"_tag\":\"%s\","
"\"_type\":\"row\"," "\"_type\":\"row\","
"\"type\":\"transop\"," "\"type\":\"transop\","
"\"tx_pkt\":%lu," "\"tx_pkt\":%lu,"
"\"rx_pkt\":%lu}\n", "\"rx_pkt\":%lu}\n",
tag, req->tag,
eee->transop.tx_cnt, req->eee->transop.tx_cnt,
eee->transop.rx_cnt); req->eee->transop.rx_cnt);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, send_reply(req, buf, msg_len);
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, msg_len = snprintf(buf->str, buf->size,
"{" "{"
"\"_tag\":\"%s\"," "\"_tag\":\"%s\","
"\"_type\":\"row\"," "\"_type\":\"row\","
"\"type\":\"p2p\"," "\"type\":\"p2p\","
"\"tx_pkt\":%u," "\"tx_pkt\":%u,"
"\"rx_pkt\":%u}\n", "\"rx_pkt\":%u}\n",
tag, req->tag,
eee->stats.tx_p2p, req->eee->stats.tx_p2p,
eee->stats.rx_p2p); req->eee->stats.rx_p2p);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, send_reply(req, buf, msg_len);
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, msg_len = snprintf(buf->str, buf->size,
"{" "{"
"\"_tag\":\"%s\"," "\"_tag\":\"%s\","
"\"_type\":\"row\"," "\"_type\":\"row\","
"\"type\":\"super\"," "\"type\":\"super\","
"\"tx_pkt\":%u," "\"tx_pkt\":%u,"
"\"rx_pkt\":%u}\n", "\"rx_pkt\":%u}\n",
tag, req->tag,
eee->stats.tx_sup, req->eee->stats.tx_sup,
eee->stats.rx_sup); req->eee->stats.rx_sup);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, send_reply(req, buf, msg_len);
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, msg_len = snprintf(buf->str, buf->size,
"{" "{"
"\"_tag\":\"%s\"," "\"_tag\":\"%s\","
"\"_type\":\"row\"," "\"_type\":\"row\","
"\"type\":\"super_broadcast\"," "\"type\":\"super_broadcast\","
"\"tx_pkt\":%u," "\"tx_pkt\":%u,"
"\"rx_pkt\":%u}\n", "\"rx_pkt\":%u}\n",
tag, req->tag,
eee->stats.tx_sup_broadcast, req->eee->stats.tx_sup_broadcast,
eee->stats.rx_sup_broadcast); req->eee->stats.rx_sup_broadcast);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, send_reply(req, buf, msg_len);
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
} }
static void mgmt_unimplemented (n2n_edge_t *eee, char *udp_buf, const struct soc kaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *arg v) { static void mgmt_post_test (mgmt_req_t *req, strbuf_t *buf, char *argv0, char *a rgv) {
mgmt_error(eee, udp_buf, sender_sock, tag, "unimplemented"); send_json_1str(req, buf, "row", "sending", "test");
mgmt_event_post(N2N_EVENT_TEST, -1, argv);
} }
static void mgmt_help (n2n_edge_t *eee, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv); static void mgmt_unimplemented (mgmt_req_t *req, strbuf_t *buf, char *argv0, cha r *argv) {
n2n_mgmt_handler_t mgmt_handlers[] = { mgmt_error(req, buf, "unimplemented");
}
// Forward define so we can include this in the mgmt_handlers[] table
static void mgmt_help (mgmt_req_t *req, strbuf_t *buf, char *argv0, char *argv);
static void mgmt_help_events (mgmt_req_t *req, strbuf_t *buf, char *argv0, char
*argv);
static const mgmt_handler_t mgmt_handlers[] = {
{ .cmd = "reload_communities", .flags = FLAG_WROK, .help = "Reserved for sup ernode", .func = mgmt_unimplemented}, { .cmd = "reload_communities", .flags = FLAG_WROK, .help = "Reserved for sup ernode", .func = mgmt_unimplemented},
{ .cmd = "stop", .flags = FLAG_WROK, .help = "Gracefully exit edge", .func = mgmt_stop}, { .cmd = "stop", .flags = FLAG_WROK, .help = "Gracefully exit edge", .func = mgmt_stop},
{ .cmd = "verbose", .flags = FLAG_WROK, .help = "Manage verbosity level", .f unc = mgmt_verbose}, { .cmd = "verbose", .flags = FLAG_WROK, .help = "Manage verbosity level", .f unc = mgmt_verbose},
{ .cmd = "communities", .help = "Show current community", .func = mgmt_commu nities}, { .cmd = "communities", .help = "Show current community", .func = mgmt_commu nities},
{ .cmd = "edges", .help = "List current edges/peers", .func = mgmt_edges}, { .cmd = "edges", .help = "List current edges/peers", .func = mgmt_edges},
{ .cmd = "supernodes", .help = "List current supernodes", .func = mgmt_super nodes}, { .cmd = "supernodes", .help = "List current supernodes", .func = mgmt_super nodes},
{ .cmd = "timestamps", .help = "Event timestamps", .func = mgmt_timestamps}, { .cmd = "timestamps", .help = "Event timestamps", .func = mgmt_timestamps},
{ .cmd = "packetstats", .help = "traffic counters", .func = mgmt_packetstats }, { .cmd = "packetstats", .help = "traffic counters", .func = mgmt_packetstats },
{ .cmd = "post.test", .help = "send a test event", .func = mgmt_post_test},
{ .cmd = "help", .flags = FLAG_WROK, .help = "Show JSON commands", .func = m gmt_help}, { .cmd = "help", .flags = FLAG_WROK, .help = "Show JSON commands", .func = m gmt_help},
{ .cmd = NULL }, { .cmd = "help.events", .help = "Show available Subscribe topics", .func = m
gmt_help_events},
};
/* Current subscriber for each event topic */
static mgmt_req_t mgmt_event_subscribers[] = {
[N2N_EVENT_DEBUG] = { .eee = NULL, .type = N2N_MGMT_UNKNOWN, .tag = "\0" },
[N2N_EVENT_TEST] = { .eee = NULL, .type = N2N_MGMT_UNKNOWN, .tag = "\0" },
[N2N_EVENT_PEER] = { .eee = NULL, .type = N2N_MGMT_UNKNOWN, .tag = "\0" },
};
/* Map topic number to function */
static const size_t (*mgmt_events[])(strbuf_t *buf, char *tag, int data0, void *
data1) = {
[N2N_EVENT_DEBUG] = event_debug,
[N2N_EVENT_TEST] = event_test,
[N2N_EVENT_PEER] = event_peer,
};
/* Allow help and subscriptions to use topic name */
static const mgmt_events_t mgmt_event_names[] = {
{ .cmd = "debug", .topic = N2N_EVENT_DEBUG, .help = "All events - for event
debugging"},
{ .cmd = "test", .topic = N2N_EVENT_TEST, .help = "Used only by post.test"},
{ .cmd = "peer", .topic = N2N_EVENT_PEER, .help = "Changes to peer list"},
}; };
static void mgmt_help (n2n_edge_t *eee, char *udp_buf, const struct sockaddr_in void mgmt_event_post (enum n2n_event_topic topic, int data0, void *data1) {
sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) { mgmt_req_t *debug = &mgmt_event_subscribers[N2N_EVENT_DEBUG];
mgmt_req_t *sub = &mgmt_event_subscribers[topic];
traceEvent(TRACE_DEBUG, "post topic=%i data0=%i", topic, data0);
if( sub->type != N2N_MGMT_SUB && debug->type != N2N_MGMT_SUB) {
// If neither of this topic or the debug topic have a subscriber
// then we dont need to do any work
return;
}
char buf_space[100];
strbuf_t *buf;
STRBUF_INIT(buf, buf_space);
char *tag;
if(sub->type == N2N_MGMT_SUB) {
tag = sub->tag;
} else {
tag = debug->tag;
}
size_t msg_len = mgmt_events[topic](buf, tag, data0, data1);
if(sub->type == N2N_MGMT_SUB) {
send_reply(sub, buf, msg_len);
}
if(debug->type == N2N_MGMT_SUB) {
send_reply(debug, buf, msg_len);
}
}
static void mgmt_help_events (mgmt_req_t *req, strbuf_t *buf, char *argv0, char
*argv) {
size_t msg_len;
int i;
int nr_handlers = sizeof(mgmt_event_names) / sizeof(mgmt_events_t);
for( i=0; i < nr_handlers; i++ ) {
int topic = mgmt_event_names[i].topic;
mgmt_req_t *sub = &mgmt_event_subscribers[topic];
char host[40];
char serv[6];
if((sub->type != N2N_MGMT_SUB) ||
getnameinfo((struct sockaddr *)&sub->sender_sock, sizeof(sub->sender_
sock),
host, sizeof(host),
serv, sizeof(serv),
NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
host[0] = '?';
host[1] = 0;
serv[0] = '?';
serv[1] = 0;
}
// TODO: handle a topic with no subscribers more cleanly
msg_len = snprintf(buf->str, buf->size,
"{"
"\"_tag\":\"%s\","
"\"_type\":\"row\","
"\"topic\":\"%s\","
"\"tag\":\"%s\","
"\"sockaddr\":\"%s:%s\","
"\"help\":\"%s\"}\n",
req->tag,
mgmt_event_names[i].cmd,
sub->tag,
host, serv,
mgmt_event_names[i].help);
send_reply(req, buf, msg_len);
}
}
static void mgmt_help (mgmt_req_t *req, strbuf_t *buf, char *argv0, char *argv)
{
size_t msg_len; size_t msg_len;
n2n_mgmt_handler_t *handler;
/* /*
* Even though this command is readonly, we deliberately do not check * Even though this command is readonly, we deliberately do not check
* the type - allowing help replies to both read and write requests * the type - allowing help replies to both read and write requests
*/ */
for( handler=mgmt_handlers; handler->cmd; handler++ ) { int i;
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, int nr_handlers = sizeof(mgmt_handlers) / sizeof(mgmt_handler_t);
for( i=0; i < nr_handlers; i++ ) {
msg_len = snprintf(buf->str, buf->size,
"{" "{"
"\"_tag\":\"%s\"," "\"_tag\":\"%s\","
"\"_type\":\"row\"," "\"_type\":\"row\","
"\"cmd\":\"%s\"," "\"cmd\":\"%s\","
"\"help\":\"%s\"}\n", "\"help\":\"%s\"}\n",
tag, req->tag,
handler->cmd, mgmt_handlers[i].cmd,
handler->help); mgmt_handlers[i].help);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0, send_reply(req, buf, msg_len);
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
} }
} }
/* /*
* Check if the user is authorised for this command. * Check if the user is authorised for this command.
* - this should be more configurable! * - this should be more configurable!
* - for the moment we use some simple heuristics: * - for the moment we use some simple heuristics:
* Reads are not dangerous, so they are simply allowed * Reads are not dangerous, so they are simply allowed
* Writes are possibly dangerous, so they need a fake password * Writes are possibly dangerous, so they need a fake password
*/ */
static int mgmt_auth (n2n_edge_t *eee, const struct sockaddr_in sender_sock, enu m n2n_mgmt_type type, char *auth, char *argv0, char *argv) { static int mgmt_auth (mgmt_req_t *req, char *auth, char *argv0, char *argv) {
if(auth) { if(auth) {
/* If we have an auth key, it must match */ /* If we have an auth key, it must match */
if(eee->conf.mgmt_password_hash == pearson_hash_64((uint8_t*)auth, strle n(auth))) { if(req->eee->conf.mgmt_password_hash == pearson_hash_64((uint8_t*)auth, strlen(auth))) {
return 1; return 1;
} }
return 0; return 0;
} }
/* if we dont have an auth key, we can still read */ /* if we dont have an auth key, we can still read */
if(type == N2N_MGMT_READ) { if(req->type == N2N_MGMT_READ) {
return 1; return 1;
} }
return 0; return 0;
} }
void handleMgmtJson (n2n_edge_t *eee, char *udp_buf, const struct sockaddr_in se nder_sock) { static void handleMgmtJson (mgmt_req_t *req, char *udp_buf, const int recvlen) {
strbuf_t *buf;
char cmdlinebuf[80]; char cmdlinebuf[80];
enum n2n_mgmt_type type;
char *typechar; char *typechar;
char *options; char *options;
char *argv0; char *argv0;
char *argv; char *argv;
char *tag;
char *flagstr; char *flagstr;
int flags; int flags;
char *auth; char *auth;
n2n_mgmt_handler_t *handler;
size_t msg_len; /* Initialise the tag field until we extract it from the cmdline */
req->tag[0] = '-';
req->tag[1] = '1';
req->tag[2] = '\0';
/* save a copy of the commandline before we reuse the udp_buf */ /* save a copy of the commandline before we reuse the udp_buf */
strncpy(cmdlinebuf, udp_buf, sizeof(cmdlinebuf)-1); strncpy(cmdlinebuf, udp_buf, sizeof(cmdlinebuf)-1);
cmdlinebuf[sizeof(cmdlinebuf)-1] = 0; cmdlinebuf[sizeof(cmdlinebuf)-1] = 0;
traceEvent(TRACE_DEBUG, "mgmt json %s", cmdlinebuf); traceEvent(TRACE_DEBUG, "mgmt json %s", cmdlinebuf);
/* we reuse the buffer already on the stack for all our strings */
STRBUF_INIT(buf, udp_buf);
typechar = strtok(cmdlinebuf, " \r\n"); typechar = strtok(cmdlinebuf, " \r\n");
if(!typechar) { if(!typechar) {
/* should not happen */ /* should not happen */
mgmt_error(eee, udp_buf, sender_sock, "-1", "notype"); mgmt_error(req, buf, "notype");
return; return;
} }
if(*typechar == 'r') { if(*typechar == 'r') {
type=N2N_MGMT_READ; req->type=N2N_MGMT_READ;
} else if(*typechar == 'w') { } else if(*typechar == 'w') {
type=N2N_MGMT_WRITE; req->type=N2N_MGMT_WRITE;
} else if(*typechar == 's') {
req->type=N2N_MGMT_SUB;
} else { } else {
/* dunno how we got here */ mgmt_error(req, buf, "badtype");
mgmt_error(eee, udp_buf, sender_sock, "-1", "badtype");
return; return;
} }
/* Extract the tag to use in all reply packets */ /* Extract the tag to use in all reply packets */
options = strtok(NULL, " \r\n"); options = strtok(NULL, " \r\n");
if(!options) { if(!options) {
mgmt_error(eee, udp_buf, sender_sock, "-1", "nooptions"); mgmt_error(req, buf, "nooptions");
return; return;
} }
argv0 = strtok(NULL, " \r\n"); argv0 = strtok(NULL, " \r\n");
if(!argv0) { if(!argv0) {
mgmt_error(eee, udp_buf, sender_sock, "-1", "nocmd"); mgmt_error(req, buf, "nocmd");
return; return;
} }
/* /*
* The entire rest of the line is the argv. We apply no processing * The entire rest of the line is the argv. We apply no processing
* or arg separation so that the cmd can use it however it needs. * or arg separation so that the cmd can use it however it needs.
*/ */
argv = strtok(NULL, "\r\n"); argv = strtok(NULL, "\r\n");
/* /*
* There might be an auth token mixed in with the tag * There might be an auth token mixed in with the tag
*/ */
tag = strtok(options, ":"); char *tagp = strtok(options, ":");
strncpy(req->tag, tagp, sizeof(req->tag)-1);
req->tag[sizeof(req->tag)-1] = '\0';
flagstr = strtok(NULL, ":"); flagstr = strtok(NULL, ":");
if(flagstr) { if(flagstr) {
flags = strtoul(flagstr, NULL, 16); flags = strtoul(flagstr, NULL, 16);
} else { } else {
flags = 0; flags = 0;
} }
/* Only 1 flag bit defined at the moment - "auth option present" */ /* Only 1 flag bit defined at the moment - "auth option present" */
if(flags & 1) { if(flags & 1) {
auth = strtok(NULL, ":"); auth = strtok(NULL, ":");
} else { } else {
auth = NULL; auth = NULL;
} }
if(!mgmt_auth(eee, sender_sock, type, auth, argv0, argv)) { if(!mgmt_auth(req, auth, argv0, argv)) {
mgmt_error(eee, udp_buf, sender_sock, tag, "badauth"); mgmt_error(req, buf, "badauth");
return; return;
} }
for( handler=mgmt_handlers; handler->cmd; handler++ ) { if(req->type == N2N_MGMT_SUB) {
if(0 == strcmp(handler->cmd, argv0)) { int handler;
break; lookup_handler(handler, mgmt_event_names, argv0);
if(handler == -1) {
mgmt_error(req, buf, "unknowntopic");
return;
} }
int topic = mgmt_event_names[handler].topic;
if(mgmt_event_subscribers[topic].type == N2N_MGMT_SUB) {
send_json_1str(&mgmt_event_subscribers[topic], buf,
"unsubscribed", "topic", argv0);
send_json_1str(req, buf, "replacing", "topic", argv0);
}
memcpy(&mgmt_event_subscribers[topic], req, sizeof(*req));
send_json_1str(req, buf, "subscribe", "topic", argv0);
return;
} }
if(!handler->cmd) {
mgmt_error(eee, udp_buf, sender_sock, tag, "unknowncmd"); int handler;
lookup_handler(handler, mgmt_handlers, argv0);
if(handler == -1) {
mgmt_error(req, buf, "unknowncmd");
return; return;
} }
if((type==N2N_MGMT_WRITE) && !(handler->flags & FLAG_WROK)) { if((req->type==N2N_MGMT_WRITE) && !(mgmt_handlers[handler].flags & FLAG_WROK
mgmt_error(eee, udp_buf, sender_sock, tag, "readonly"); )) {
mgmt_error(req, buf, "readonly");
return; return;
} }
/* /*
* TODO: * TODO:
* The tag provided by the requester could contain chars * The tag provided by the requester could contain chars
* that make our JSON invalid. * that make our JSON invalid.
* - do we care? * - do we care?
*/ */
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, send_json_1str(req, buf, "begin", "cmd", argv0);
"{\"_tag\":\"%s\",\"_type\":\"begin\",\"cmd\":\"%s\"}\n",
tag, argv0);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
handler->func(eee, udp_buf, sender_sock, type, tag, argv0, argv); mgmt_handlers[handler].func(req, buf, argv0, argv);
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE, send_json_1str(req, buf, "end", "cmd", argv0);
"{\"_tag\":\"%s\",\"_type\":\"end\"}\n", tag);
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
return; return;
} }
/** Read a datagram from the management UDP socket and take appropriate
* action. */
void readFromMgmtSocket (n2n_edge_t *eee) {
char udp_buf[N2N_PKT_BUF_SIZE]; /* Compete UDP packet */
ssize_t recvlen;
/* ssize_t sendlen; */
mgmt_req_t req;
socklen_t i;
size_t msg_len;
time_t now;
struct peer_info *peer, *tmpPeer;
macstr_t mac_buf;
char time_buf[10]; /* 9 digits + 1 terminating zero */
char uptime_buf[11]; /* 10 digits + 1 terminating zero */
/* dec_ip_bit_str_t ip_bit_str = {'\0'}; */
/* dec_ip_str_t ip_str = {'\0'}; */
in_addr_t net;
n2n_sock_str_t sockbuf;
uint32_t num_pending_peers = 0;
uint32_t num_known_peers = 0;
uint32_t num = 0;
selection_criterion_str_t sel_buf;
req.eee = eee;
now = time(NULL);
i = sizeof(req.sender_sock);
recvlen = recvfrom(eee->udp_mgmt_sock, udp_buf, N2N_PKT_BUF_SIZE, 0 /*flags*
/,
(struct sockaddr *) &req.sender_sock, (socklen_t *) &i);
if(recvlen < 0) {
traceEvent(TRACE_WARNING, "mgmt recvfrom failed: %d - %s", errno, strerr
or(errno));
return; /* failed to receive data from UDP */
}
/* avoid parsing any uninitialized junk from the stack */
udp_buf[recvlen] = 0;
if((0 == memcmp(udp_buf, "help", 4)) || (0 == memcmp(udp_buf, "?", 1))) {
strbuf_t *buf;
STRBUF_INIT(buf, &udp_buf);
msg_len = snprintf(buf->str, buf->size,
"Help for edge management console:\n"
"\tstop | Gracefully exit edge\n"
"\thelp | This help message\n"
"\t+verb | Increase verbosity of logging\n"
"\t-verb | Decrease verbosity of logging\n"
"\tr ... | start query with JSON reply\n"
"\tw ... | start update with JSON reply\n"
"\ts ... | subscribe to event channel JSON reply\n"
"\t<enter> | Display statistics\n\n");
send_reply(&req, buf, msg_len);
return;
}
if(0 == memcmp(udp_buf, "stop", 4)) {
traceEvent(TRACE_NORMAL, "stop command received");
*eee->keep_running = 0;
return;
}
if(0 == memcmp(udp_buf, "+verb", 5)) {
setTraceLevel(getTraceLevel() + 1);
traceEvent(TRACE_NORMAL, "+verb traceLevel=%u", (unsigned int) getTraceL
evel());
strbuf_t *buf;
STRBUF_INIT(buf, &udp_buf);
msg_len = snprintf(buf->str, buf->size,
"> +OK traceLevel=%u\n", (unsigned int) getTraceLevel
());
send_reply(&req, buf, msg_len);
return;
}
if(0 == memcmp(udp_buf, "-verb", 5)) {
strbuf_t *buf;
STRBUF_INIT(buf, &udp_buf);
if(getTraceLevel() > 0) {
setTraceLevel(getTraceLevel() - 1);
msg_len = snprintf(buf->str, buf->size,
"> -OK traceLevel=%u\n", getTraceLevel());
} else {
msg_len = snprintf(buf->str, buf->size,
"> -NOK traceLevel=%u\n", getTraceLevel());
}
traceEvent(TRACE_NORMAL, "-verb traceLevel=%u", (unsigned int) getTraceL
evel());
send_reply(&req, buf, msg_len);
return;
}
if((udp_buf[0] >= 'a' && udp_buf[0] <= 'z') && (udp_buf[1] == ' ')) {
/* this is a JSON request */
handleMgmtJson(&req, udp_buf, recvlen);
return;
}
traceEvent(TRACE_DEBUG, "mgmt status requested");
msg_len = 0;
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"COMMUNITY '%s'\n\n",
(eee->conf.header_encryption == HEADER_ENCRYPTION_NONE)
? (char*)eee->conf.community_name : "-- header encrypted --");
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
" ### | TAP | MAC | EDGE
| HINT | LAST SEEN | UPTIME\n");
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"=======================================================
======================================================\n");
// dump nodes with forwarding through supernodes
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"SUPERNODE FORWARD\n");
num = 0;
HASH_ITER(hh, eee->pending_peers, peer, tmpPeer) {
++num_pending_peers;
net = htonl(peer->dev_addr.net_addr);
snprintf(time_buf, sizeof(time_buf), "%9u", (unsigned int)(now - peer->l
ast_seen));
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - ms
g_len),
"%4u | %-15s | %-17s | %-21s | %-15s | %9s |\n",
++num,
(peer->dev_addr.net_addr == 0) ? "" : inet_ntoa(*(st
ruct in_addr *) &net),
(is_null_mac(peer->mac_addr)) ? "" : macaddr_str(mac
_buf, peer->mac_addr),
sock_to_cstr(sockbuf, &(peer->sock)),
peer->dev_desc,
(peer->last_seen) ? time_buf : "");
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &req.sender_sock, sizeof(struct sockaddr_in))
;
msg_len = 0;
}
// dump peer-to-peer nodes
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"-------------------------------------------------------
------------------------------------------------------\n");
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"PEER TO PEER\n");
num = 0;
HASH_ITER(hh, eee->known_peers, peer, tmpPeer) {
++num_known_peers;
net = htonl(peer->dev_addr.net_addr);
snprintf(time_buf, sizeof(time_buf), "%9u", (unsigned int)(now - peer->l
ast_seen));
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - ms
g_len),
"%4u | %-15s | %-17s | %-21s | %-15s | %9s |\n",
++num,
(peer->dev_addr.net_addr == 0) ? "" : inet_ntoa(*(st
ruct in_addr *) &net),
(is_null_mac(peer->mac_addr)) ? "" : macaddr_str(mac
_buf, peer->mac_addr),
sock_to_cstr(sockbuf, &(peer->sock)),
peer->dev_desc,
(peer->last_seen) ? time_buf : "");
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &req.sender_sock, sizeof(struct sockaddr_in))
;
msg_len = 0;
}
// dump supernodes
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"-------------------------------------------------------
------------------------------------------------------\n");
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"SUPERNODES\n");
HASH_ITER(hh, eee->conf.supernodes, peer, tmpPeer) {
net = htonl(peer->dev_addr.net_addr);
snprintf(time_buf, sizeof(time_buf), "%9u", (unsigned int)(now - peer->l
ast_seen));
snprintf(uptime_buf, sizeof(uptime_buf), "%10u", (unsigned int)(peer->up
time));
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - ms
g_len),
"%-19s %1s%1s | %-17s | %-21s | %-15s | %9s | %10s\n
",
peer->version,
(peer->purgeable == SN_UNPURGEABLE) ? "l" : "",
(peer == eee->curr_sn) ? (eee->sn_wait ? "." : "*" )
: "",
is_null_mac(peer->mac_addr) ? "" : macaddr_str(mac_b
uf, peer->mac_addr),
sock_to_cstr(sockbuf, &(peer->sock)),
sn_selection_criterion_str(eee, sel_buf, peer),
(peer->last_seen) ? time_buf : "",
(peer->uptime) ? uptime_buf : "");
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &req.sender_sock, sizeof(struct sockaddr_in))
;
msg_len = 0;
}
// further stats
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"=======================================================
======================================================\n");
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"uptime %lu | ",
time(NULL) - eee->start_time);
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"pend_peers %u | ",
num_pending_peers);
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"known_peers %u | ",
num_known_peers);
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"transop %u,%u\n",
(unsigned int) eee->transop.tx_cnt,
(unsigned int) eee->transop.rx_cnt);
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"super %u,%u | ",
(unsigned int) eee->stats.tx_sup,
(unsigned int) eee->stats.rx_sup);
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"p2p %u,%u\n",
(unsigned int) eee->stats.tx_p2p,
(unsigned int) eee->stats.rx_p2p);
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"last_super %ld sec ago | ",
(now - eee->last_sup));
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"last_p2p %ld sec ago\n",
(now - eee->last_p2p));
msg_len += snprintf((char *) (udp_buf + msg_len), (N2N_PKT_BUF_SIZE - msg_le
n),
"\nType \"help\" to see more commands.\n\n");
sendto(eee->udp_mgmt_sock, udp_buf, msg_len, 0,
(struct sockaddr *) &req.sender_sock, sizeof(struct sockaddr_in));
}
 End of changes. 82 change blocks. 
163 lines changed or deleted 381 lines changed or added

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