mirror of
https://github.com/ntop/n2n.git
synced 2024-09-19 00:21:11 +02:00
Refactor as much as possible of sn_management to use shared code
This commit is contained in:
parent
d81908d6a2
commit
71dbaf0bdc
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@ -24,186 +24,106 @@
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#include "n2n.h"
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#include "edge_utils_win32.h"
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#include "strbuf.h"
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#include "management.h"
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int load_allowed_sn_community (n2n_sn_t *sss); /* defined in sn_utils.c */
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enum n2n_mgmt_type {
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N2N_MGMT_READ = 0,
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N2N_MGMT_WRITE = 1,
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};
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static void mgmt_reload_communities (mgmt_req_t *req, strbuf_t *buf) {
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#define FLAG_WROK 1
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typedef struct mgmt_handler {
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int flags;
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char *cmd;
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char *help;
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void (*func)(n2n_sn_t *sss, char *udp_buf, struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv);
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} mgmt_handler_t;
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static void mgmt_error (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, char *tag, char *msg) {
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size_t msg_len;
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"error\","
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"\"error\":\"%s\"}\n",
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tag,
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msg);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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}
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static void mgmt_stop (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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size_t msg_len;
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if(type==N2N_MGMT_WRITE) {
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*sss->keep_running = 0;
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}
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"keep_running\":%u}\n",
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tag,
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*sss->keep_running);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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}
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static void mgmt_verbose (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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size_t msg_len;
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if(type==N2N_MGMT_WRITE) {
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if(argv) {
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setTraceLevel(strtoul(argv, NULL, 0));
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}
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}
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"traceLevel\":%u}\n",
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tag,
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getTraceLevel());
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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}
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static void mgmt_reload_communities (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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size_t msg_len;
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if(type!=N2N_MGMT_WRITE) {
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mgmt_error(sss, udp_buf, sender_sock, tag, "writeonly");
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if(req->type!=N2N_MGMT_WRITE) {
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mgmt_error(req, buf, "writeonly");
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return;
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}
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if(!sss->community_file) {
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mgmt_error(sss, udp_buf, sender_sock, tag, "nofile");
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if(!req->sss->community_file) {
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mgmt_error(req, buf, "nofile");
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return;
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}
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int ok = load_allowed_sn_community(sss);
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"ok\":%i}\n",
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tag,
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ok);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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int ok = load_allowed_sn_community(req->sss);
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send_json_1uint(req, buf, "row", "ok", ok);
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}
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static void mgmt_timestamps (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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static void mgmt_timestamps (mgmt_req_t *req, strbuf_t *buf) {
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size_t msg_len;
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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msg_len = snprintf(buf->str, buf->size,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"start_time\":%lu,"
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"\"last_fwd\":%ld,"
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"\"last_reg_super\":%ld}\n",
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tag,
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sss->start_time,
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sss->stats.last_fwd,
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sss->stats.last_reg_super);
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req->tag,
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req->sss->start_time,
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req->sss->stats.last_fwd,
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req->sss->stats.last_reg_super);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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send_reply(req, buf, msg_len);
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}
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static void mgmt_packetstats (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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static void mgmt_packetstats (mgmt_req_t *req, strbuf_t *buf) {
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size_t msg_len;
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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msg_len = snprintf(buf->str, buf->size,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"type\":\"forward\","
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"\"tx_pkt\":%lu}\n",
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tag,
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sss->stats.fwd);
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req->tag,
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req->sss->stats.fwd);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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send_reply(req, buf, msg_len);
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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msg_len = snprintf(buf->str, buf->size,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"type\":\"broadcast\","
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"\"tx_pkt\":%lu}\n",
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tag,
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sss->stats.broadcast);
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req->tag,
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req->sss->stats.broadcast);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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send_reply(req, buf, msg_len);
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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msg_len = snprintf(buf->str, buf->size,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"type\":\"reg_super\","
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"\"rx_pkt\":%lu,"
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"\"nak\":%lu}\n",
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tag,
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sss->stats.reg_super,
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sss->stats.reg_super_nak);
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req->tag,
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req->sss->stats.reg_super,
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req->sss->stats.reg_super_nak);
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/* Note: reg_super_nak is not currently incremented anywhere */
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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send_reply(req, buf, msg_len);
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/* Generic errors when trying to sendto() */
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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msg_len = snprintf(buf->str, buf->size,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"type\":\"errors\","
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"\"tx_pkt\":%lu}\n",
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tag,
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sss->stats.errors);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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req->tag,
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req->sss->stats.errors);
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send_reply(req, buf, msg_len);
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}
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static void mgmt_communities (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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static void mgmt_communities (mgmt_req_t *req, strbuf_t *buf) {
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size_t msg_len;
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struct sn_community *community, *tmp;
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dec_ip_bit_str_t ip_bit_str = {'\0'};
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HASH_ITER(hh, sss->communities, community, tmp) {
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HASH_ITER(hh, req->sss->communities, community, tmp) {
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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msg_len = snprintf(buf->str, buf->size,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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@ -211,19 +131,17 @@ static void mgmt_communities (n2n_sn_t *sss, char *udp_buf, const struct sockadd
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"\"purgeable\":%i,"
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"\"is_federation\":%i,"
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"\"ip4addr\":\"%s\"}\n",
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tag,
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req->tag,
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(community->is_federation) ? "-/-" : community->community,
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community->purgeable,
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community->is_federation,
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(community->auto_ip_net.net_addr == 0) ? "" : ip_subnet_to_str(ip_bit_str, &community->auto_ip_net));
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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send_reply(req, buf, msg_len);
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}
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}
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static void mgmt_edges (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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static void mgmt_edges (mgmt_req_t *req, strbuf_t *buf) {
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size_t msg_len;
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struct sn_community *community, *tmp;
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struct peer_info *peer, *tmpPeer;
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@ -231,10 +149,10 @@ static void mgmt_edges (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in s
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n2n_sock_str_t sockbuf;
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dec_ip_bit_str_t ip_bit_str = {'\0'};
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HASH_ITER(hh, sss->communities, community, tmp) {
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HASH_ITER(hh, req->sss->communities, community, tmp) {
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HASH_ITER(hh, community->edges, peer, tmpPeer) {
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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msg_len = snprintf(buf->str, buf->size,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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@ -246,29 +164,25 @@ static void mgmt_edges (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in s
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"\"proto\":\"%s\","
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"\"desc\":\"%s\","
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"\"last_seen\":%li}\n",
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tag,
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req->tag,
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(community->is_federation) ? "-/-" : community->community,
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(peer->dev_addr.net_addr == 0) ? "" : ip_subnet_to_str(ip_bit_str, &peer->dev_addr),
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peer->purgeable,
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(is_null_mac(peer->mac_addr)) ? "" : macaddr_str(mac_buf, peer->mac_addr),
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sock_to_cstr(sockbuf, &(peer->sock)),
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((peer->socket_fd >= 0) && (peer->socket_fd != sss->sock)) ? "TCP" : "UDP",
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((peer->socket_fd >= 0) && (peer->socket_fd != req->sss->sock)) ? "TCP" : "UDP",
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peer->dev_desc,
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peer->last_seen);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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send_reply(req, buf, msg_len);
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}
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}
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}
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static void mgmt_unimplemented (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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mgmt_error(sss, udp_buf, sender_sock, tag, "unimplemented");
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}
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// Forward define so we can include this in the mgmt_handlers[] table
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static void mgmt_help (mgmt_req_t *req, strbuf_t *buf);
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static void mgmt_help (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv);
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mgmt_handler_t mgmt_handlers[] = {
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static const mgmt_handler_t mgmt_handlers[] = {
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{ .cmd = "supernodes", .help = "Reserved for edge", .func = mgmt_unimplemented},
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{ .cmd = "stop", .flags = FLAG_WROK, .help = "Gracefully exit edge", .func = mgmt_stop},
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@ -279,72 +193,28 @@ mgmt_handler_t mgmt_handlers[] = {
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{ .cmd = "timestamps", .help = "Event timestamps", .func = mgmt_timestamps},
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{ .cmd = "packetstats", .help = "Traffic statistics", .func = mgmt_packetstats},
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{ .cmd = "help", .flags = FLAG_WROK, .help = "Show JSON commands", .func = mgmt_help},
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{ .cmd = NULL },
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};
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static void mgmt_help (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *tag, char *argv0, char *argv) {
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size_t msg_len;
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mgmt_handler_t *handler;
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// TODO: want to keep the mgmt_handlers defintion const static, otherwise
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// this whole function could be shared
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static void mgmt_help (mgmt_req_t *req, strbuf_t *buf) {
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/*
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* Even though this command is readonly, we deliberately do not check
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* the type - allowing help replies to both read and write requests
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*/
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for( handler=mgmt_handlers; handler->cmd; handler++ ) {
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msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
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"{"
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"\"_tag\":\"%s\","
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"\"_type\":\"row\","
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"\"cmd\":\"%s\","
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"\"help\":\"%s\"}\n",
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tag,
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handler->cmd,
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handler->help);
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sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
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(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
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int i;
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int nr_handlers = sizeof(mgmt_handlers) / sizeof(mgmt_handler_t);
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for( i=0; i < nr_handlers; i++ ) {
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mgmt_help_row(req, buf, mgmt_handlers[i].cmd, mgmt_handlers[i].help);
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}
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}
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/*
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* Check if the user is authorised for this command.
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* - this should be more configurable!
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* - for the moment we use some simple heuristics:
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* Reads are not dangerous, so they are simply allowed
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* Writes are possibly dangerous, so they need a fake password
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*/
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static int mgmt_auth (n2n_sn_t *sss, const struct sockaddr_in sender_sock, enum n2n_mgmt_type type, char *auth, char *argv0, char *argv) {
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if(auth) {
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/* If we have an auth key, it must match */
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if(sss->mgmt_password_hash == pearson_hash_64((uint8_t*)auth, strlen(auth))) {
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return 1;
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}
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return 0;
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}
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/* if we dont have an auth key, we can still read */
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if(type == N2N_MGMT_READ) {
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return 1;
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}
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return 0;
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}
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static void handleMgmtJson (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_in sender_sock) {
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// TODO: DRY
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static void handleMgmtJson (mgmt_req_t *req, char *udp_buf, const int recvlen) {
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strbuf_t *buf;
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char cmdlinebuf[80];
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enum n2n_mgmt_type type;
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char *typechar;
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char *options;
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char *argv0;
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char *argv;
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char *tag;
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char *flagstr;
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int flags;
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char *auth;
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mgmt_handler_t *handler;
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size_t msg_len;
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/* save a copy of the commandline before we reuse the udp_buf */
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strncpy(cmdlinebuf, udp_buf, sizeof(cmdlinebuf)-1);
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@ -352,76 +222,21 @@ static void handleMgmtJson (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_
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traceEvent(TRACE_DEBUG, "mgmt json %s", cmdlinebuf);
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typechar = strtok(cmdlinebuf, " \r\n");
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if(!typechar) {
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/* should not happen */
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mgmt_error(sss, udp_buf, sender_sock, "-1", "notype");
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return;
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}
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if(*typechar == 'r') {
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type=N2N_MGMT_READ;
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} else if(*typechar == 'w') {
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type=N2N_MGMT_WRITE;
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} else {
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/* dunno how we got here */
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mgmt_error(sss, udp_buf, sender_sock, "-1", "badtype");
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/* we reuse the buffer already on the stack for all our strings */
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// xx
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||||
STRBUF_INIT(buf, udp_buf);
|
||||
|
||||
mgmt_req_init2(req, buf, (char *)&cmdlinebuf);
|
||||
|
||||
int handler;
|
||||
lookup_handler(handler, mgmt_handlers, req->argv0);
|
||||
if(handler == -1) {
|
||||
mgmt_error(req, buf, "unknowncmd");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Extract the tag to use in all reply packets */
|
||||
options = strtok(NULL, " \r\n");
|
||||
if(!options) {
|
||||
mgmt_error(sss, udp_buf, sender_sock, "-1", "nooptions");
|
||||
return;
|
||||
}
|
||||
|
||||
argv0 = strtok(NULL, " \r\n");
|
||||
if(!argv0) {
|
||||
mgmt_error(sss, udp_buf, sender_sock, "-1", "nocmd");
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
argv = strtok(NULL, "\r\n");
|
||||
|
||||
/*
|
||||
* There might be an auth token mixed in with the tag
|
||||
*/
|
||||
tag = strtok(options, ":");
|
||||
flagstr = strtok(NULL, ":");
|
||||
if(flagstr) {
|
||||
flags = strtoul(flagstr, NULL, 16);
|
||||
} else {
|
||||
flags = 0;
|
||||
}
|
||||
|
||||
/* Only 1 flag bit defined at the moment - "auth option present" */
|
||||
if(flags & 1) {
|
||||
auth = strtok(NULL, ":");
|
||||
} else {
|
||||
auth = NULL;
|
||||
}
|
||||
|
||||
if(!mgmt_auth(sss, sender_sock, type, auth, argv0, argv)) {
|
||||
mgmt_error(sss, udp_buf, sender_sock, tag, "badauth");
|
||||
return;
|
||||
}
|
||||
|
||||
for( handler=mgmt_handlers; handler->cmd; handler++ ) {
|
||||
if(0 == strcmp(handler->cmd, argv0)) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if(!handler->cmd) {
|
||||
mgmt_error(sss, udp_buf, sender_sock, tag, "unknowncmd");
|
||||
return;
|
||||
}
|
||||
|
||||
if((type==N2N_MGMT_WRITE) && !(handler->flags & FLAG_WROK)) {
|
||||
mgmt_error(sss, udp_buf, sender_sock, tag, "readonly");
|
||||
if((req->type==N2N_MGMT_WRITE) && !(mgmt_handlers[handler].flags & FLAG_WROK)) {
|
||||
mgmt_error(req, buf, "readonly");
|
||||
return;
|
||||
}
|
||||
|
||||
|
@ -431,17 +246,11 @@ static void handleMgmtJson (n2n_sn_t *sss, char *udp_buf, const struct sockaddr_
|
|||
* that make our JSON invalid.
|
||||
* - do we care?
|
||||
*/
|
||||
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
|
||||
"{\"_tag\":\"%s\",\"_type\":\"begin\",\"cmd\":\"%s\"}\n", tag, argv0);
|
||||
sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
|
||||
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
|
||||
send_json_1str(req, buf, "begin", "cmd", req->argv0);
|
||||
|
||||
handler->func(sss, udp_buf, sender_sock, type, tag, argv0, argv);
|
||||
mgmt_handlers[handler].func(req, buf);
|
||||
|
||||
msg_len = snprintf(udp_buf, N2N_PKT_BUF_SIZE,
|
||||
"{\"_tag\":\"%s\",\"_type\":\"end\"}\n", tag);
|
||||
sendto(sss->mgmt_sock, udp_buf, msg_len, 0,
|
||||
(struct sockaddr *) &sender_sock, sizeof(struct sockaddr_in));
|
||||
send_json_1str(req, buf, "end", "cmd", req->argv0);
|
||||
return;
|
||||
}
|
||||
|
||||
|
@ -470,6 +279,7 @@ int process_mgmt (n2n_sn_t *sss,
|
|||
|
||||
char resbuf[N2N_SN_PKTBUF_SIZE];
|
||||
size_t ressize = 0;
|
||||
mgmt_req_t req;
|
||||
uint32_t num_edges = 0;
|
||||
uint32_t num_comm = 0;
|
||||
uint32_t num = 0;
|
||||
|
@ -482,6 +292,13 @@ int process_mgmt (n2n_sn_t *sss,
|
|||
|
||||
traceEvent(TRACE_DEBUG, "process_mgmt");
|
||||
|
||||
req.eee = NULL;
|
||||
req.sss = sss;
|
||||
req.mgmt_sock = sss->mgmt_sock;
|
||||
req.keep_running = sss->keep_running;
|
||||
req.mgmt_password_hash = sss->mgmt_password_hash;
|
||||
memcpy(&req.sender_sock, sender_sock, sizeof(req.sender_sock));
|
||||
|
||||
/* avoid parsing any uninitialized junk from the stack */
|
||||
mgmt_buf[mgmt_size] = 0;
|
||||
|
||||
|
@ -517,9 +334,9 @@ int process_mgmt (n2n_sn_t *sss,
|
|||
return 0; /* no status output afterwards */
|
||||
}
|
||||
|
||||
if((mgmt_buf[0] == 'r' || mgmt_buf[0] == 'w') && (mgmt_buf[1] == ' ')) {
|
||||
if((mgmt_buf[0] >= 'a' || mgmt_buf[0] <= 'z') && (mgmt_buf[1] == ' ')) {
|
||||
/* this is a JSON request */
|
||||
handleMgmtJson(sss, mgmt_buf, *sender_sock);
|
||||
handleMgmtJson(&req, mgmt_buf, mgmt_size);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in New Issue
Block a user