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ntripcaster.c
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ntripcaster.c
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#include "ulog/ulog.h"
#include "wsocket/wsocket.h"
#include "wsocket/utils/tcpsvr.h"
#include "queue/queue.h"
#include "base64.h"
#include "geohash.h"
#include "tokens.h"
#include "proxy_cluster.h"
#include "libfort/fort.h"
#include "repo_version.h"
#ifdef _WIN32
# include "evwrap.h"
#else
# include <ev.h>
#endif
#include <stdio.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <stddef.h>
#include <signal.h>
#include <stdbool.h>
#include <math.h>
#define DEFAULT_CONSOLE_PASSWD "passwd"
#define TOKENS_DB_FILE "cors-relay.db"
static char * env_console_passwd()
{
char *p = getenv("CONSOLE_PASSWD");
return p ? p : DEFAULT_CONSOLE_PASSWD;
}
#define CONSOLE_PASSWD env_console_passwd()
struct ntrip_caster;
struct ntrip_source;
struct ntrip_conn {
ev_io io;
wsocket socket;
int gate;
char ip[64];
ev_tstamp last_activity;
unsigned char recv[1024];
size_t recv_idx;
struct ntrip_caster *caster;
TAILQ_ENTRY(ntrip_conn) entries; // used for connection
};
struct ntrip_agent {
ev_io io;
wsocket socket;
int gate;
char ip[64];
ev_tstamp last_activity;
unsigned char recv[1024];
size_t recv_idx;
struct ntrip_caster *caster; // caster, weak ref
char token[64]; // ntrip token
char mnt[64]; // ntrip mnt
char info[64]; // ntrip agent info
time_t login_time; // ntrip login time
// recent location
char ggastr[256]; // recent gga string
double pos[3]; // lat(deg),long(deg) height(m)
double ecef[3]; // ecef coordinate
struct ntrip_source *source; // bound ntrip_source, weak ref
int source_ref_idx;
size_t in_bytes; // in bytes
size_t in_bps; // in bps
size_t out_bytes; // out bytes
size_t out_bps; // out bps
TAILQ_ENTRY(ntrip_agent) entries; // use in caster's list
TAILQ_ENTRY(ntrip_agent) src_entries; // use in source's list
};
#define AGENT_HAS_GGA(agent) (agent->ggastr[0] != '\0')
#define AGENT_HAS_POS(agent) (agent->ecef[0] != 0.0)
#define AGENT_IS_BOUND(agent) (agent->source != NULL)
struct ntrip_source {
struct ntrip_proxy *proxy;
time_t proxy_activity;
int gate;
char mnt[64];
TAILQ_HEAD(, ntrip_agent) agents_head[2]; // first and second bound agents list, weak ref,
unsigned char agents_cache[2][512]; // cache data
size_t agents_cache_cnt[2]; // cache data len
int swmagic; // >= 0 use idx=0, < 0 use idx = 1
struct ntrip_caster *caster;
TAILQ_ENTRY(ntrip_source) entries;
};
struct ntrip_listener {
ev_io io;
wsocket socket; // listen socket
int gate; // listen port
struct ntrip_caster *caster;
TAILQ_ENTRY(ntrip_listener) entries;
};
struct ntrip_caster {
ev_timer timer_check; // timer for check agent alive
ev_timer timer_src; // timer for sending source gga
ev_timer timer_log; // timer for loging status
ev_stat stat_user; // stat watcher for user tokens file change
ev_stat stat_src; // stat watcher for source tokens file change
ev_periodic periodic_reload; // periodic to reload user tokens file
TAILQ_HEAD(, ntrip_listener) listeners_head; // listener list, owned
TAILQ_HEAD(, ntrip_conn) conn_head; // connections list(not login), owned
TAILQ_HEAD(, ntrip_agent) agents_head; // active agents list, owned
TAILQ_HEAD(, ntrip_source) sources_head; // source list, owned
ev_io cmd_io;
wsocket cmd_sock;
struct tcpsvr *log;
};
#define NTRIP_RESPONSE_OK "ICY 200 OK\r\n"
#define NTRIP_RESPONSE_UNAUTHORIZED "HTTP/1.0 401 Unauthorized\r\n"
#define NTRIP_RESPONSE_FORBIDDEN "HTTP/1.0 403 Forbidden\r\n"
#define NTRIP_RESPONSE_ERROR_PASSED "ERROR - Bad Password\r\n"
#define NTRIP_RESPONSE_ERROR_MOUNTP "ERROR - Bad Mountpoint\r\n"
#define SEND(s, str) send(s, str, strlen(str), 0)
static wsocket listen_on(const char *addr, const char* service)
{
wsocket sock = INVALID_WSOCKET;
struct addrinfo hints = {0};
hints.ai_family = PF_UNSPEC;
hints.ai_flags = AI_PASSIVE;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
int rv = 0;
struct addrinfo *ai = NULL;
if ((rv = getaddrinfo(addr, service, &hints, &ai)) != 0) {
LOG_ERROR("getaddrinfo() error, %s", gai_strerror(rv));
return INVALID_WSOCKET;
}
for (const struct addrinfo *p = ai; p != NULL; p = p->ai_next) {
sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
if (wsocket_set_nonblocking(sock) == WSOCKET_ERROR) {
LOG_ERROR("set nonblocking error, %s", wsocket_strerror(wsocket_errno));
wsocket_close(sock);
return INVALID_WSOCKET;
}
if (sock == INVALID_WSOCKET) {
continue;
}
// enable addr resuse
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char *)&(int){1}, sizeof(int));
if (bind(sock, p->ai_addr, p->ai_addrlen) == WSOCKET_ERROR) {
// bind error
wsocket_close(sock);
sock = INVALID_WSOCKET;
continue;
}
// Got it!
break;
}
if (sock == INVALID_WSOCKET) {
LOG_ERROR("socket() or bind() error, %s", wsocket_strerror(wsocket_errno));
freeaddrinfo(ai);
ai = NULL;
return INVALID_WSOCKET;
}
freeaddrinfo(ai);
ai = NULL;
if (listen(sock, 2) == WSOCKET_ERROR) {
LOG_ERROR("listen() error, %s", wsocket_strerror(wsocket_errno));
wsocket_close(sock);
return INVALID_WSOCKET;
}
return sock;
}
/* convert ddmm.mm in nmea format to deg -------------------------------------*/
static double dmm2deg(double dmm)
{
return floor(dmm/100.0)+fmod(dmm,100.0)/60.0;
}
static void pos2ecef(const double *pos, double *r)
{
#define RE_WGS84 6378137.0 /* earth semimajor axis (WGS84) (m) */
#define FE_WGS84 (1.0/298.257223563) /* earth flattening (WGS84) */
double sinp=sin(pos[0]),cosp=cos(pos[0]),sinl=sin(pos[1]),cosl=cos(pos[1]);
double e2=FE_WGS84*(2.0-FE_WGS84),v=RE_WGS84/sqrt(1.0-e2*sinp*sinp);
r[0]=(v+pos[2])*cosp*cosl;
r[1]=(v+pos[2])*cosp*sinl;
r[2]=(v*(1.0-e2)+pos[2])*sinp;
}
static bool agent_calc_location(struct ntrip_agent *agent)
{
#define D2R (M_PI/180.0)
if (AGENT_HAS_GGA(agent)) {
// parse gga fileds
char gga[128];
snprintf(gga, sizeof(gga), agent->ggastr);
char *val[64];
int n = 0;
char *p, *q;
for (p = gga; *p && n < sizeof(val)/sizeof(val[0]); p = q + 1) {
if ((q = strchr(p, ',')) || (q = strchr(p, '*'))) {
val[n++] = p;
*q = '\0';
} else {
break;
}
}
// $xxGGA
if (n >= 13 && strlen(val[0]) > 4 && strcmp(val[0] + 3, "GGA") == 0) {
double lat = 0.0, lon = 0.0, alt = 0.0, msl = 0.0;
char ns = 'N', ew = 'E';
lat = atof(val[2]); /* latitude (ddmm.mmm) */
ns = *val[3]; /* N=north,S=south */
lon = atof(val[4]); /* longitude (dddmm.mmm) */
ew = *val[5]; /* E=east,W=west */
alt =atof(val[9]); /* altitude in msl */
msl =atof(val[11]); /* height of geoid */
if ((ns != 'N' && ns != 'S') || (ew != 'E' && ew != 'W')) {
LOG_ERROR("invalid nmea gpgga format");
return false;
}
if (lat == 0.0) {
LOG_ERROR("empty nmea gpgga");
return false;
}
agent->pos[0] = (ns == 'N' ? 1.0 : -1.0) * dmm2deg(lat);
agent->pos[1] = (ew == 'E' ? 1.0 : -1.0) * dmm2deg(lon);
agent->pos[2] = alt + msl;
// calc ecef
double pos[3] = {0};
pos[0] = agent->pos[0] * D2R;
pos[1] = agent->pos[1] * D2R;
pos[2] = agent->pos[2];
pos2ecef(pos, agent->ecef);
return true;
}
}
return false;
}
static double agent_distance(const struct ntrip_agent *ag1, const struct ntrip_agent *ag0)
{
double dd[3];
for (int i = 0; i < 3; i++) {
dd[i] = ag1->ecef[i] - ag0->ecef[i];
}
return sqrt(dd[0] * dd[0] + dd[1] * dd[1] + dd[2] * dd[2]);
}
static bool caster_bind_agent(struct ntrip_caster *caster, struct ntrip_agent *agent)
{
if (AGENT_IS_BOUND(agent)) {
LOG_ERROR("%s() is already bound", __func__);
return false;
}
if (!AGENT_HAS_POS(agent)) {
LOG_ERROR("%s() expect agent with position", __func__);
return false;
}
struct ntrip_source *match = NULL, *wedge = NULL;
int match_idx = 0, wedge_idx = 0;
// search if a source that gate and mnt is same, and distance is short (< 30km)
struct ntrip_source *src;
TAILQ_FOREACH(src, &caster->sources_head, entries) {
if (src->gate == agent->gate && strcasecmp(src->mnt, agent->mnt) == 0) {
for (int i = 0; i < 2; i++) {
struct ntrip_agent* srcag = TAILQ_FIRST(&src->agents_head[i]);
// find first wedge
if (srcag == NULL && wedge == NULL) {
wedge = src;
wedge_idx = i;
}
// gate and mnt must be same, and then calcute distance
if (srcag) {
double d = agent_distance(agent, srcag);
if (d < 30000) { // less than 30 km
match = src;
match_idx = i;
}
}
}
}
}
if (match == NULL) { // no match source
// first, try create new source
struct ntrip_proxy *proxy = proxycluster_take_proxy(agent->gate, agent->mnt);
if (proxy != NULL) {
struct ntrip_source *source = malloc(sizeof(*source));
if (source == NULL) {
LOG_ERROR("malloc error, %s", strerror(errno));
proxycluster_release_proxy(proxy);
} else {
source->proxy = proxy;
source->proxy_activity = time(NULL);
source->gate = agent->gate;
snprintf(source->mnt, sizeof(source->mnt), agent->mnt);
TAILQ_INIT(&source->agents_head[0]);
TAILQ_INIT(&source->agents_head[1]);
source->agents_cache_cnt[0] = 0;
source->agents_cache_cnt[1] = 0;
source->swmagic = 0;
source->caster = caster;
// insert to caster->source_head
TAILQ_INSERT_TAIL(&caster->sources_head, source, entries);
match = source;
match_idx = 0;
LOG_TRACE("create source(%s) for agent(%d)", ntripproxy_get_path(source->proxy), agent->socket);
}
} else {
LOG_INFO("all proxy is in use, no more new proxy");
}
}
if (match == NULL) { // no more new source
// try to use wedge
if (wedge == NULL) {
LOG_ERROR("no more usable source, wedge is FULL");
} else {
match = wedge;
match_idx = wedge_idx;
}
}
// final check
if (match == NULL) {
LOG_ERROR("cannot bind valid source to agent(%d)", agent->socket);
return false;
} else {
LOG_TRACE("bind source(%s) with agent(%d)", ntripproxy_get_path(match->proxy), agent->socket);
// add weak ref to each other
TAILQ_INSERT_TAIL(&match->agents_head[match_idx], agent, src_entries);
agent->source = match;
agent->source_ref_idx = match_idx;
return true;
}
}
static void caster_relax_agent(struct ntrip_caster *caster, struct ntrip_agent *agent)
{
if (!AGENT_IS_BOUND(agent)) {
LOG_ERROR("%s() is not bound", __func__);
return;
}
struct ntrip_source *source = agent->source;
LOG_TRACE("detach agent(%d) with source(%s)", agent->socket, ntripproxy_get_path(source->proxy));
// remove weak ref to each other
TAILQ_REMOVE(&source->agents_head[agent->source_ref_idx], agent, src_entries);
// check if source no-need-work
if (TAILQ_EMPTY(&source->agents_head[0]) && TAILQ_EMPTY(&source->agents_head[1])) {
// remove it from caster and close it
LOG_TRACE("close source(%s)", ntripproxy_get_path(source->proxy));
TAILQ_REMOVE(&caster->sources_head, source, entries);
proxycluster_release_proxy(source->proxy);
free(source);
}
agent->source = NULL;
agent->source_ref_idx = 0;
}
// only cleanup conn resource
static void close_conn(EV_P_ struct ntrip_conn *conn)
{
LOG_INFO("close conn(%d) from %s", conn->socket, conn->ip);
ev_io_stop(EV_A_ &conn->io);
wsocket_close(conn->socket);
free(conn);
}
// only cleanup agent and conn resource
static void close_agent(EV_P_ struct ntrip_agent *agent)
{
LOG_INFO("close agent(%d) from %s", agent->socket, agent->ip);
ev_io_stop(EV_A_ &agent->io);
wsocket_close(agent->socket);
free(agent);
}
static void caster_close_conn(EV_P_ struct ntrip_caster *caster, struct ntrip_conn *conn)
{
LOG_INFO("remove conn(%d) from connections list", conn->socket);
TAILQ_REMOVE(&caster->conn_head, conn, entries);
close_conn(EV_A_ conn);
}
static void caster_close_agent(EV_P_ struct ntrip_caster *caster, struct ntrip_agent *agent)
{
if (AGENT_IS_BOUND(agent)) {
caster_relax_agent(caster, agent);
}
LOG_INFO("remove agent(%d) from agents list", agent->socket);
TAILQ_REMOVE(&caster->agents_head, agent, entries);
close_agent(EV_A_ agent);
}
// check if caster has the mountpoint source
static int caster_has_mountpoint(const struct ntrip_caster *caster, const char* mnt)
{
// invalid mnt
if (mnt[0] == '\0' || strcmp(mnt, "/") == 0) {
return 0;
}
if (strcasecmp(mnt, "RTCM30_GG") == 0 ||
strcasecmp(mnt, "RTCM23_GPS") == 0 ||
strcasecmp(mnt, "RTCM32_GGB") == 0) {
return 1;
}
return 0;
}
static const char* caster_gen_sourcetable(const struct ntrip_caster *caster)
{
const char * _srctbbuf = ""
"STR;RTCM30_GG;RTCM30_GG;RTCM3X;1005(10),1004-1012(1),1033(10);2;GNSS;POPNet;CHN;0.00;0.00;1;1;POP Platform;none;B;N;500;POP\r\n"
"STR;RTCM23_GPS;RTCM23_GPS;RTCM2X;1(1),31(1),41(1),3(10),32(30);2;GNSS;POPNet;CHN;0.00;0.00;1;1;POP Platform;none;B;N;500;POP\r\n"
"STR;RTCM32_GGB;RTCM32_GGB;RTCM3X;1005(10),1074-1084-1124(1);2;GNSS;POPNet;CHN;0.00;0.00;1;1;POP Platform;none;B;N;500;POP\r\n"
"ENDSOURCETABLE\r\n";
return _srctbbuf;
}
static bool caster_match_client_token(const struct ntrip_caster *caster, const char* token, const char* mnt)
{
char buf[64];
snprintf(buf, sizeof(buf), "%s", token);
char *p = strchr(buf, ':');
if (p) {
*p = '\0';
return tokens_user_permit(buf, p + 1);
}
return false;
}
static struct ntrip_agent* caster_check_login(const struct ntrip_caster *caster, const char *token)
{
struct ntrip_agent* ag;
TAILQ_FOREACH(ag, &caster->agents_head, entries) {
if (strcmp(ag->token, token) == 0) {
return ag;
}
}
return NULL;
}
static void agent_read_cb(EV_P_ ev_io *w, int revents)
{
struct ntrip_agent *agent = (struct ntrip_agent *)w;
struct ntrip_caster *caster = agent->caster;
int n = recv(agent->socket,
agent->recv + agent->recv_idx,
sizeof(agent->recv) - agent->recv_idx - 1,
0);
if (n == WSOCKET_ERROR && wsocket_errno != WSOCKET_EWOULDBLOCK) {
LOG_INFO("agent(%d) recv error, %s", agent->socket, wsocket_strerror(wsocket_errno));
caster_close_agent(EV_A_ caster, agent);
return;
}
if (n == 0) {
LOG_INFO("agent(%d) connection close", agent->socket);
caster_close_agent(EV_A_ caster, agent);
return;
}
if (n < 0) { // maybe -1 since WSOCKET_EWOULDBLOCK
return;
}
agent->recv_idx += n;
agent->in_bytes += n;
agent->in_bps = n * 8;
// check pending buffer overflow
if (agent->recv_idx >= sizeof(agent->recv) - 1) {
LOG_ERROR("agent(%d) recv buffer overflow", agent->socket);
caster_close_agent(EV_A_ caster, agent);
return;
}
agent->recv[agent->recv_idx] = '\0';
// search for gga
char *p = strchr(agent->recv, '$');
char *g = NULL;
if (p && strlen(p) > 6 && strncmp(p + 3, "GGA", 3) == 0) {
char *q = strstr(p, "\r\n");
if (q) { // found
*q = '\0';
agent->recv_idx = 0;
snprintf(agent->ggastr, sizeof(agent->ggastr), "%s\r\n", p);
if (!agent_calc_location(agent)) {
LOG_ERROR("agent(%d) calc loaction error", agent->socket);
} else {
//LOG_DEBUG("agent(%d) loc: %f %f %f", agent->socket, agent->pos[0], agent->pos[1], agent->pos[2]);
agent->last_activity = ev_now(EV_A);
}
// bound agent
if (!AGENT_IS_BOUND(agent)) {
if (!caster_bind_agent(caster, agent)) {
LOG_WARN("agent(%d) bind to source error, let it un-bound", agent->socket);
}
}
}
}
}
static void conn_read_cb(EV_P_ ev_io *w, int revents)
{
struct ntrip_conn *conn = (struct ntrip_conn *)w;
struct ntrip_caster *caster = conn->caster;
int n = recv(conn->socket,
conn->recv + conn->recv_idx,
sizeof(conn->recv) - conn->recv_idx - 1,
0);
if (n == WSOCKET_ERROR && wsocket_errno != WSOCKET_EWOULDBLOCK) {
LOG_INFO("conn(%d) recv error, %s", conn->socket, wsocket_strerror(wsocket_errno));
caster_close_conn(EV_A_ caster, conn);
return;
}
if (n == 0) {
LOG_INFO("conn(%d) connection close", conn->socket);
caster_close_conn(EV_A_ caster, conn);
return;
}
if (n < 0) { // maybe -1 since WSOCKET_EWOULDBLOCK
return;
}
conn->last_activity = ev_now(EV_A);
conn->recv_idx += n;
// check pending buffer overflow
if (conn->recv_idx >= sizeof(conn->recv) - 1) {
LOG_ERROR("conn(%d) recv buffer overflow", conn->socket);
caster_close_conn(EV_A_ caster, conn);
return;
}
conn->recv[conn->recv_idx] = '\0';
// check ntrip request, end with \r\n\r\n
if (strstr(conn->recv, "\r\n\r\n")) {
char *p = strstr(conn->recv, "GET");
if (p == NULL) {
LOG_ERROR("conn(%d) invalid ntrip request", conn->socket);
caster_close_conn(EV_A_ caster, conn);
return;
}
// process ntrip client requst
// TODO:
char *q, *ag;
if (!(q = strstr(p, "\r\n")) || !(ag = strstr(q, "User-Agent:")) || !strstr(ag, "\r\n")) {
LOG_ERROR("conn(%d) invalid ntrip request", conn->socket);
caster_close_conn(EV_A_ caster, conn);
return;
}
ag += strlen("User-Agent:");
char useragent[64];
// fill user agent
sscanf(ag, "%63[^\n]", useragent);
// test protocol
char url[64] = {0};
char proto[64] = {0};
if (sscanf(p, "GET %s %s", url, proto) < 2 || strncmp(proto, "HTTP/1", strlen("HTTP/1")) != 0) {
LOG_ERROR("conn(%d) invalid ntrip proto=%s", conn->socket, proto);
caster_close_conn(EV_A_ caster, conn);
return;
}
char mnt[64];
snprintf(mnt, sizeof(mnt), "%s", url[0] == '/' ? url + 1 : url);
// check if mountpoint exist, if not , send source table
if (!caster_has_mountpoint(caster, mnt)) {
// send source table
LOG_DEBUG("send source table to conn(%d) from %s",
conn->socket, conn->ip);
const char* srctb = caster_gen_sourcetable(caster);
int srctblen = strlen(srctb);
char buf[256];
buf[0] = '\0';
time_t now = time(NULL);
// NOTE: DO NOT use time functions in LOG_XXX macros
char* timestr = strdup(asctime(gmtime(&now)));
snprintf(buf, sizeof(buf),
"SOURCETABLE 200 OK\r\n"
"Server: https://github.com/tisyang/cors-relay\r\n"
"Date: %.24s UTC\r\n"
"Connection: close\r\n"
"Content-Type: text/plain\r\n"
"Content-Length: %d\r\n\r\n",
timestr, srctblen);
free(timestr);
if (send(conn->socket, buf, strlen(buf), 0) > 0) {
send(conn->socket, srctb, srctblen, 0);
}
caster_close_conn(EV_A_ caster, conn);
return;
}
// check authentication
int auth = 0; // if authorization success
char token[64];
if ((p = strstr(conn->recv, "Authorization:"))) {
char method[32] = {0};
char tokenbuf[64] = {0};
if (sscanf(p, "Authorization: %s %s", method, tokenbuf) == 2) {
if (strcmp(method, "Basic") == 0) {
// decode token
size_t tklen = 0;
unsigned char* tk = base64_decode(tokenbuf, strlen(tokenbuf), &tklen);
if (tk) {
snprintf(token, sizeof(token), "%.*s", tklen, tk);
free(tk);
if (caster_match_client_token(caster, token, mnt)) {
auth = 1;
}
}
}
}
}
if (!auth) { // auth failed
LOG_INFO("agent(%d) client authorization failed.", conn->socket);
send(conn->socket, NTRIP_RESPONSE_UNAUTHORIZED,
strlen(NTRIP_RESPONSE_UNAUTHORIZED), 0);
caster_close_conn(EV_A_ caster, conn);
return;
}
// check if already login
struct ntrip_agent* oldag = caster_check_login(caster, token);
if (oldag) {
// close old ones
LOG_INFO("close already login agent(%d)", oldag->socket);
caster_close_agent(EV_A_ caster, oldag);
}
// create pending agent
struct ntrip_agent *agent = malloc(sizeof(*agent));
if (agent == NULL) {
LOG_ERROR("malloc error, %s", strerror(errno));
caster_close_conn(EV_A_ caster, conn);
return;
}
// copy from conn to agent
agent->socket = conn->socket;
snprintf(agent->ip, sizeof(agent->ip), conn->ip);
agent->gate = conn->gate;
agent->last_activity = conn->last_activity;
agent->recv[0] = '\0';
agent->recv_idx = 0;
ev_io_stop(EV_A_ &conn->io);
LOG_INFO("remove conn(%d) from connections list", conn->socket);
TAILQ_REMOVE(&caster->conn_head, conn, entries);
free(conn);
// use agent read cb
ev_io_init(EV_A_ &agent->io, agent_read_cb, WSOCKET_GET_FD(agent->socket), EV_READ);
ev_io_start(EV_A_ &agent->io);
snprintf(agent->token, sizeof(agent->token), token);
snprintf(agent->mnt, sizeof(agent->mnt), mnt);
snprintf(agent->info, sizeof(agent->info), useragent);
agent->login_time = time(NULL);
agent->ggastr[0] = '\0';
for (int i = 0; i < 3; i++) {
agent->pos[i] = 0;
agent->ecef[i] = 0;
}
agent->source = NULL;
agent->source_ref_idx = 0;
agent->in_bytes = 0;
agent->in_bps = 0;
agent->out_bytes = 0;
agent->out_bps = 0;
agent->caster = caster;
// send response
SEND(conn->socket, NTRIP_RESPONSE_OK);
LOG_INFO("move agent(%d) into client agents", agent->socket);
TAILQ_INSERT_TAIL(&caster->agents_head, agent, entries);
}
}
static void listener_accept_cb(EV_P_ ev_io *w, int revents)
{
struct ntrip_listener *listener = (struct ntrip_listener *)w;
struct ntrip_caster *caster = listener->caster;
wsocket sock = INVALID_WSOCKET;
struct sockaddr_storage conn_addr = {0};
socklen_t conn_addrlen = sizeof(conn_addr);
if (EV_ERROR & revents) {
LOG_ERROR("invalid ev event with error");
return;
}
sock = accept(listener->socket, (struct sockaddr *)&conn_addr, &conn_addrlen);
if (sock == INVALID_WSOCKET) {
LOG_ERROR("accept() error, %s", wsocket_strerror(wsocket_errno));
return;
}
// set nonblocking
wsocket_set_nonblocking(sock);
// print connect info
char addrbuf[NI_MAXHOST] = {0};
char servbuf[NI_MAXSERV] = {0};
int rv = 0;
if ((rv = getnameinfo((struct sockaddr *)&conn_addr, conn_addrlen,
addrbuf, sizeof(addrbuf),
servbuf, sizeof(servbuf),
NI_NUMERICHOST | NI_NUMERICSERV)) == 0) {
LOG_INFO("accept conn(%d) from %s:%s", sock, addrbuf, servbuf);
} else {
LOG_ERROR("getnameinfo() error, %s", gai_strerror(rv));
}
struct ntrip_conn *conn = malloc(sizeof(*conn));
if (conn == NULL) {
LOG_ERROR("malloc() error, %s", strerror(errno));
wsocket_close(sock);
return;
}
conn->socket = sock;
conn->gate = listener->gate;
snprintf(conn->ip, sizeof(conn->ip), addrbuf);
conn->last_activity = ev_now(EV_A);
conn->recv[0] = '\0';
conn->recv_idx = 0;
conn->caster = caster;
ev_io_init(&conn->io, conn_read_cb, WSOCKET_GET_FD(conn->socket), EV_READ);
ev_io_start(EV_A_ &conn->io);
LOG_INFO("move conn(%d) to connections list", conn->socket);
TAILQ_INSERT_TAIL(&caster->conn_head, conn, entries);
}
static void caster_tmcheck_cb(EV_P_ ev_timer *w, int revents)
{
struct ntrip_caster *caster = (struct ntrip_caster *)((char *)w - offsetof(struct ntrip_caster, timer_check));
ev_tstamp now = ev_now(EV_A);
// check conn list
struct ntrip_conn *conn, *tmpconn;
TAILQ_FOREACH_SAFE(conn, &caster->conn_head, entries, tmpconn) {
if (now - conn->last_activity >= 60.0) {
LOG_INFO("timeout conn(%d) from %s", conn->socket, conn->ip);
caster_close_conn(EV_A_ caster, conn);
}
}
// check agent list
struct ntrip_agent *agent, *tmpagent;
TAILQ_FOREACH_SAFE(agent, &caster->agents_head, entries, tmpagent) {
if (now - agent->last_activity >= 60.0) {
LOG_INFO("timeout agent(%d) from %s", agent->socket, agent->ip);
caster_close_agent(EV_A_ caster, agent);
}
}
}
static void caster_tmsrc_cb(EV_P_ ev_timer *w, int revents)
{
time_t now = time(NULL);
struct ntrip_caster *caster = (struct ntrip_caster *)((char *)w - offsetof(struct ntrip_caster, timer_src));
struct ntrip_source *src, *tmpsrc;
TAILQ_FOREACH_SAFE(src, &caster->sources_head, entries, tmpsrc) {
struct ntrip_agent *ag0 = TAILQ_FIRST(&src->agents_head[0]);
struct ntrip_agent *ag1 = TAILQ_FIRST(&src->agents_head[1]);
struct ntrip_agent *ag = NULL;
if (ag0 && ag1) {
// switch using
ag = src->swmagic >= 0 ? ag0 : ag1;
src->swmagic += 1;
if (src->swmagic == 5) {
src->swmagic = -5;
}
} else {
ag = ag0 ? ag0 : ag1;
}
if (ag) {
// send gga
ntripproxy_write(src->proxy, ag->ggastr, strlen(ag->ggastr));
}
// warning about this proxy due it is not active
double elapsed = difftime(now, src->proxy_activity);
if (AGENT_HAS_POS(ag) && elapsed > 30) {
LOG_WARN("source(%s)'s last activity is %.0f seconds ago", ntripproxy_get_path(src->proxy), elapsed);
// close agent
caster_close_agent(EV_A_ caster, ag);
}
}
}
#define WRITE_STR(s, fp, psock, str) do {\
if (fp) { \
fprintf(fp, str); \
if (s) tcpsvr_write(s, str, strlen(str)); \
} \
if (psock) send(*psock, str, strlen(str), 0); \
} while (0)
static void system_report(ev_tstamp now, struct ntrip_caster *caster,
FILE *fp, wsocket *psock)
{
// print status of all activity
WRITE_STR(caster->log, fp, psock, "==== BEGIN SYSTEM REPORT ====\n");
WRITE_STR(caster->log, fp, psock, REPO_VERSION ", " REPO_DATE "\n");
WRITE_STR(caster->log, fp, psock, ctime(&(time_t){time(NULL)}));
{
WRITE_STR(caster->log, fp, psock, "Resources Usage Table:\n");
int user_total = tokens_user_count();
int user_online = 0;
struct ntrip_agent *ag;
TAILQ_FOREACH(ag, &caster->agents_head, entries) {
user_online += 1;
}
int src_total = proxycluster_capacity_count();
int src_used = proxycluster_using_count();
ft_table_t *table = ft_create_table();
ft_set_cell_prop(table, 0, FT_ANY_COLUMN, FT_CPROP_ROW_TYPE, FT_ROW_HEADER);
ft_write_ln(table, "Users\nOnline", "Users\nTotal", "Online\nRate", "Source\nUsing",
"Source\nTotal", "Source\nRate", "Potency");
ft_printf_ln(table, "%d|%d|%.1f %%|%d|%d|%.1f %%|%.1f %%",
user_online, user_total,
user_total <= 0 ? 0 : (float)user_online/user_total * 100,
src_used, src_total,
src_total <= 0 ? 0 : (float)src_used/src_total * 100,
src_total <= 0 ? 0 : (float)user_online/src_total * 100);
WRITE_STR(caster->log, fp, psock, ft_to_string(table));
ft_destroy_table(table);
}
{
WRITE_STR(caster->log, fp, psock, "Connections Table:\n");
ft_table_t *table = ft_create_table();
ft_set_border_style(table, FT_BASIC_STYLE);
ft_set_cell_prop(table, 0, FT_ANY_COLUMN, FT_CPROP_ROW_TYPE, FT_ROW_HEADER);
ft_write_ln(table, "Source", "Slot", "Client", "Client IP", "Location", "Login Time", "Out Bps", "Out Bytes");
struct ntrip_source *src;
TAILQ_FOREACH(src, &caster->sources_head, entries) {
char path[128];
// user:passwd@ip:port/mnt
// shadow password in path
{
const char *p = ntripproxy_get_path(src->proxy);
char *colon = strchr(p, ':');
char *at = strrchr(p, '@');
if (colon && at) {
snprintf(path, sizeof(path), "%.*s%s", colon - p, p, at);
}
}
for (int i = 0; i < 2; i++) {
int slot = i;
struct ntrip_agent *ag;
TAILQ_FOREACH(ag, &src->agents_head[i], src_entries) {
char time[32];
struct tm *timeinfo = localtime(&ag->login_time);
strftime(time, sizeof(time), "%m-%d %H:%M", timeinfo);
int obps = (now - ag->last_activity) < 5.0 ? ag->out_bps : 0;
float obytes = ag->out_bytes / 1024.0;
char *loc = geohash_encode(ag->pos[0], ag->pos[1], 6);
char user[16];
snprintf(user, sizeof(user), ag->token);
char *colon = strchr(user, ':');
if (colon) *colon = 0;
ft_printf_ln(table, "%s|%d|%s|%s|%s|%s|%d|%.1f KB", path, slot,
user, ag->ip, loc, time, obps, obytes);
free(loc);
}
}
ft_add_separator(table);
}
WRITE_STR(caster->log, fp, psock, ft_to_string(table));
ft_destroy_table(table);
}
WRITE_STR(caster->log, fp, psock, "==== END SYSTEM REPORT ====\n");
}
static void caster_tmlog_cb(EV_P_ ev_timer *w, int revents)
{
struct ntrip_caster *caster = (struct ntrip_caster *)((char *)w - offsetof(struct ntrip_caster, timer_log));
ev_tstamp now = ev_now(EV_A);
system_report(now, caster, stdout, NULL);
}
static void caster_midnight_cb(EV_P_ ev_periodic *w, int revents)
{
LOG_INFO("midnight comming, now run tokens user gc");
tokens_user_gc();
}
#define NTRIP_CMD_RESPONSE_BAD_COMMAND "ERROR bad command\r\n"
#define NTRIP_CMD_RESPONSE_BAD_PASSWD "ERROR bad password\r\n"
struct ntrip_cmd_arg {
wsocket socket;
struct ntrip_caster *caster;
};
static void on_iter_usertokens(void *userdata, const char *user, const char *passwd, const char *expire)
{
wsocket sock = (wsocket)userdata;
char out[128];
out[0] = '\0';
snprintf(out, sizeof(out), "%s:%s\t%s\r\n", user, passwd, expire);
SEND(sock, out);
}
static void on_iter_srctokens(void *userdata, const char* token, const char *expire)
{
wsocket sock = (wsocket)userdata;
char path[64];
snprintf(path, sizeof(path), "%s", token);
char *p = strchr(path, '@');
if (p) {
*p = '\0';
} else {
LOG_WARN("invalid source token '%s' in db", token);
return;
}
char out[256];
out[0] = '\0';
snprintf(out, sizeof(out), "%s\t%s\t%s\t?\r\n", p + 1, path, expire);
SEND(sock, out);
}
static void on_cmd_cb(int revents, void* arg)
{
struct ntrip_cmd_arg *cmd_arg = (struct ntrip_cmd_arg *)arg;
wsocket sock = cmd_arg->socket;
struct ntrip_caster *caster = cmd_arg->caster;
do {
if (revents & EV_TIMER) {
LOG_INFO("close console(%d) due to timeout", sock);
break;
} else if (revents & EV_READ) {
char buf[256];
int n = recv(sock, buf, sizeof(buf), 0);
if (n == WSOCKET_ERROR && wsocket_errno != WSOCKET_EWOULDBLOCK) {
LOG_INFO("console(%d) recv error, %s", sock, wsocket_strerror(wsocket_errno));
break;
}
if (n == 0) {
LOG_INFO("console(%d) connection close", sock);
break;
}
if (n < 0) { // maybe -1 since WSOCKET_EWOULDBLOCK
break;
}
buf[n] = '\0';
int argc = 0;
char* argv[8];
char* p = strtok(buf, " \t\r\n");
while (p != NULL && argc < 8) {
argv[argc++] = p;
p = strtok(NULL, " \t\r\n");
}
if (argc == 0) {
LOG_INFO("console(%d) bad command", sock);
SEND(sock, NTRIP_CMD_RESPONSE_BAD_COMMAND);
break;
}
LOG_INFO("console(%d) cmd argc=%d, argv[0]=%s", sock, argc, argv[0]);
// parse cmd
if (strcmp(argv[0], "USER-LIST") == 0) {
if (argc != 2) {
LOG_INFO("console(%d) bad command", sock);
SEND(sock, NTRIP_CMD_RESPONSE_BAD_COMMAND);
break;
}
if (strcmp(argv[1], CONSOLE_PASSWD) != 0) {
LOG_INFO("concole(%d) wrong pasword", sock);
SEND(sock, NTRIP_CMD_RESPONSE_BAD_PASSWD);
break;
}
// send response and list
SEND(sock, "OK USER-LIST\r\n");
tokens_user_iterate(on_iter_usertokens, (void *)sock);
SEND(sock, "\r\n");
LOG_INFO("console(%d) %s cmd OK.", sock, argv[0]);
} else if (strcmp(argv[0], "USER-ADD") == 0) {
if (argc < 4) {
LOG_INFO("console(%d) bad command", sock);
SEND(sock, NTRIP_CMD_RESPONSE_BAD_COMMAND);
break;
}
if (strcmp(argv[1], CONSOLE_PASSWD) != 0) {
LOG_INFO("soncole(%d) wrong pasword", sock);
SEND(sock, NTRIP_CMD_RESPONSE_BAD_PASSWD);
break;