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Support for pluggable event modules, stage 1. Take out select() loop and associated code into a separate module select.c. Detailed list of changes down below.

Browse Source 
The idea is taken from the nginx web server, but much simplified and
almost no copypaste left. This will allow minidlna to use different
event dispatcher APIs, which would be defined at compile time.

My personal goal is to convert minidlna to kqueue(2) on FreeBSD. This
would later allow for kqueue based directory change notification, which
won't conflict with select(2) like the current patch does.
Other platforms will also benefit from the pluggability of the event
system, Linux can switch to epoll(2) or at least to poll(2).

Detailed list of changes:

* event.h [New]
  Our internal API to unify different event dispatch systems.
* select.c [New]
  Much simplified version of nginx's ngx_select_module.c.
* minidlna.c
  - Split out listen socket event processing into separate function
    ProcessListen(), which matches event_process_t type.
  - Create and initialize struct event for the monitor socket, SSDP
    socket, HTTP socket and beacon socket.
  - Simplify and make more precise timeout calculation using
    helper timeval functions from utils.c. Treat gettimeofday() error
    as a fatal event.
  - Rip out all stuff related to select(2). Just call event_module.process().
* upnpevents.c
  - Embed struct event into upnp_event_notify.
  - Merge upnp_event_create_notify() with upnp_event_notify_connect().
    Start connecting immediately after socket creation. Garbage collect
    now useless ECreated state.
  - Make upnp_event_process_notify() of event_process_t type, and use it
    as process callback for upnp_event_notify event.
  - Looks like we always create upnp_event_notify with existing subscriber,
    and never clear it later. Remove checks for obj->sub and assert that it
    is never NULL. Simplifies things.
  - When switching obj state, add/del it to event dispatcher accrodingly.
  - Garbage collect upnpevents_selectfds().
  - Garbage collect select(2) related stuff from upnpevents_processfds().
    Rename function to upnpevents_gc(), since the remaining functionality
    is garbage collecting, not file descriptor processing.
    Actually, this can be simplified even more. We can safely close sockets
    and free objects immediately, eliminating need for upnpevents_gc(). But
    this change would be beyond scope of this commit.
* upnphttp.c, upnphttp.h
  Embed struct event into struct upnphttp. Adjust Process_upnphttp() to match
  event_process_t type. Add/del to event dispatcher once creating/closing a
  socket.
* minissdp.c, minissdp.h
  Make ProcessSSDPRequest() of event_process_t type.
* getifaddr.c, getifaddr.h
  Make ProcessMonitorEvent() of event_process_t type.
This commit is contained in:
Gleb Smirnoff 2017-12-27 15:08:40 -08:00 committed by Justin Maggard
parent 04e243c85c
commit f9a78d598e
14 changed files with 419 additions and 277 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Makefile.am
View File

@ -28,7 +28,8 @@ minidlnad_SOURCES = minidlna.c upnphttp.c upnpdescgen.c upnpsoap.c \
sql.c utils.c metadata.c scanner.c monitor.c \ sql.c utils.c metadata.c scanner.c monitor.c \
tivo_utils.c tivo_beacon.c tivo_commands.c \ tivo_utils.c tivo_beacon.c tivo_commands.c \
playlist.c image_utils.c albumart.c log.c \ playlist.c image_utils.c albumart.c log.c \
containers.c avahi.c tagutils/tagutils.c containers.c avahi.c tagutils/tagutils.c \
select.c
if HAVE_VORBISFILE if HAVE_VORBISFILE
vorbislibs = -lvorbis -logg vorbislibs = -lvorbis -logg

33
event.h Normal file
View File

@ -0,0 +1,33 @@
struct event;
typedef enum {
EVENT_READ,
EVENT_WRITE,
EVENT_RDWR,
} event_t;
typedef void event_process_t(struct event *);
struct event {
int fd;
int index;
event_t rdwr;
event_process_t *process;
void *data;
};
typedef int event_module_add_t(struct event *);
typedef int event_module_init_t(void);
typedef void event_module_fini_t(void);
typedef int event_module_process_t(u_long);
struct event_module {
event_module_add_t *add;
event_module_add_t *del;
event_module_add_t *enable;
event_module_add_t *disable;
event_module_process_t *process;
event_module_init_t *init;
event_module_fini_t *fini;
};
extern struct event_module event_module;

4
getifaddr.c
View File

@ -43,6 +43,7 @@
#endif #endif
#include "config.h" #include "config.h"
#include "event.h"
#if HAVE_GETIFADDRS #if HAVE_GETIFADDRS
# include <ifaddrs.h> # include <ifaddrs.h>
# ifdef __linux__ # ifdef __linux__
@ -377,9 +378,10 @@ OpenAndConfMonitorSocket(void)
} }
void void
ProcessMonitorEvent(int s) ProcessMonitorEvent(struct event *ev)
{ {
#ifdef HAVE_NETLINK #ifdef HAVE_NETLINK
int s = ev->fd;
int len; int len;
char buf[4096]; char buf[4096];
struct nlmsghdr *nlh; struct nlmsghdr *nlh;

2
getifaddr.h
View File

@ -43,7 +43,7 @@ int get_remote_mac(struct in_addr ip_addr, unsigned char *mac);
void reload_ifaces(int notify); void reload_ifaces(int notify);
int OpenAndConfMonitorSocket(); int OpenAndConfMonitorSocket();
void ProcessMonitorEvent(int s); void ProcessMonitorEvent(struct event *);
#endif #endif

246
minidlna.c
View File

@ -77,6 +77,7 @@
#include <libintl.h> #include <libintl.h>
#endif #endif
#include "event.h"
#include "upnpglobalvars.h" #include "upnpglobalvars.h"
#include "sql.h" #include "sql.h"
#include "upnphttp.h" #include "upnphttp.h"
@ -102,6 +103,8 @@
# define sqlite3_threadsafe() 0 # define sqlite3_threadsafe() 0
#endif #endif
static LIST_HEAD(httplisthead, upnphttp) upnphttphead;
/* OpenAndConfHTTPSocket() : /* OpenAndConfHTTPSocket() :
* setup the socket used to handle incoming HTTP connections. */ * setup the socket used to handle incoming HTTP connections. */
static int static int
@ -146,6 +149,46 @@ OpenAndConfHTTPSocket(unsigned short port)
return s; return s;
} }
/* ProcessListen() :
* accept incoming HTTP connection. */
static void
ProcessListen(struct event *ev)
{
int shttp;
socklen_t clientnamelen;
struct sockaddr_in clientname;
clientnamelen = sizeof(struct sockaddr_in);
shttp = accept(ev->fd, (struct sockaddr *)&clientname, &clientnamelen);
if (shttp<0)
{
DPRINTF(E_ERROR, L_GENERAL, "accept(http): %s\n", strerror(errno));
}
else
{
struct upnphttp * tmp = 0;
DPRINTF(E_DEBUG, L_GENERAL, "HTTP connection from %s:%d\n",
inet_ntoa(clientname.sin_addr),
ntohs(clientname.sin_port) );
/*if (fcntl(shttp, F_SETFL, O_NONBLOCK) < 0) {
DPRINTF(E_ERROR, L_GENERAL, "fcntl F_SETFL, O_NONBLOCK\n");
}*/
/* Create a new upnphttp object and add it to
* the active upnphttp object list */
tmp = New_upnphttp(shttp);
if (tmp)
{
tmp->clientaddr = clientname.sin_addr;
LIST_INSERT_HEAD(&upnphttphead, tmp, entries);
}
else
{
DPRINTF(E_ERROR, L_GENERAL, "New_upnphttp() failed\n");
close(shttp);
}
}
}
/* Handler for the SIGTERM signal (kill) /* Handler for the SIGTERM signal (kill)
* SIGINT is also handled */ * SIGINT is also handled */
static void static void
@ -1043,6 +1086,8 @@ init(int argc, char **argv)
return 1; return 1;
} }
event_module.init();
return 0; return 0;
} }
@ -1054,22 +1099,21 @@ main(int argc, char **argv)
int ret, i; int ret, i;
int shttpl = -1; int shttpl = -1;
int smonitor = -1; int smonitor = -1;
LIST_HEAD(httplisthead, upnphttp) upnphttphead;
struct upnphttp * e = 0; struct upnphttp * e = 0;
struct upnphttp * next; struct upnphttp * next;
fd_set readset; /* for select() */ struct timeval tv, timeofday, lastnotifytime = {0, 0};
fd_set writeset;
struct timeval timeout, timeofday, lastnotifytime = {0, 0};
time_t lastupdatetime = 0, lastdbtime = 0; time_t lastupdatetime = 0, lastdbtime = 0;
int max_fd = -1; u_long timeout; /* in milliseconds */
int last_changecnt = 0; int last_changecnt = 0;
pid_t scanner_pid = 0; pid_t scanner_pid = 0;
pthread_t inotify_thread = 0; pthread_t inotify_thread = 0;
struct event ssdpev, httpev, monev;
#ifdef TIVO_SUPPORT #ifdef TIVO_SUPPORT
uint8_t beacon_interval = 5; uint8_t beacon_interval = 5;
int sbeacon = -1; int sbeacon = -1;
struct sockaddr_in tivo_bcast; struct sockaddr_in tivo_bcast;
struct timeval lastbeacontime = {0, 0}; struct timeval lastbeacontime = {0, 0};
struct event beaconev;
#endif #endif
for (i = 0; i < L_MAX; i++) for (i = 0; i < L_MAX; i++)
@ -1108,6 +1152,11 @@ main(int argc, char **argv)
} }
#endif #endif
smonitor = OpenAndConfMonitorSocket(); smonitor = OpenAndConfMonitorSocket();
if (smonitor > 0)
{
monev = (struct event ){ .fd = smonitor, .rdwr = EVENT_READ, .process = ProcessMonitorEvent };
event_module.add(&monev);
}
sssdp = OpenAndConfSSDPReceiveSocket(); sssdp = OpenAndConfSSDPReceiveSocket();
if (sssdp < 0) if (sssdp < 0)
@ -1117,11 +1166,19 @@ main(int argc, char **argv)
if (SubmitServicesToMiniSSDPD(lan_addr[0].str, runtime_vars.port) < 0) if (SubmitServicesToMiniSSDPD(lan_addr[0].str, runtime_vars.port) < 0)
DPRINTF(E_FATAL, L_GENERAL, "Failed to connect to MiniSSDPd. EXITING"); DPRINTF(E_FATAL, L_GENERAL, "Failed to connect to MiniSSDPd. EXITING");
} }
else
{
ssdpev = (struct event ){ .fd = sssdp, .rdwr = EVENT_READ, .process = ProcessSSDPRequest };
event_module.add(&ssdpev);
}
/* open socket for HTTP connections. */ /* open socket for HTTP connections. */
shttpl = OpenAndConfHTTPSocket(runtime_vars.port); shttpl = OpenAndConfHTTPSocket(runtime_vars.port);
if (shttpl < 0) if (shttpl < 0)
DPRINTF(E_FATAL, L_GENERAL, "Failed to open socket for HTTP. EXITING\n"); DPRINTF(E_FATAL, L_GENERAL, "Failed to open socket for HTTP. EXITING\n");
DPRINTF(E_WARN, L_GENERAL, "HTTP listening on port %d\n", runtime_vars.port); DPRINTF(E_WARN, L_GENERAL, "HTTP listening on port %d\n", runtime_vars.port);
httpev = (struct event ){ .fd = shttpl, .rdwr = EVENT_READ, .process = ProcessListen };
event_module.add(&httpev);
#ifdef TIVO_SUPPORT #ifdef TIVO_SUPPORT
if (GETFLAG(TIVO_MASK)) if (GETFLAG(TIVO_MASK))
@ -1142,6 +1199,8 @@ main(int argc, char **argv)
if(sbeacon < 0) if(sbeacon < 0)
DPRINTF(E_FATAL, L_GENERAL, "Failed to open sockets for sending Tivo beacon notify " DPRINTF(E_FATAL, L_GENERAL, "Failed to open sockets for sending Tivo beacon notify "
"messages. EXITING\n"); "messages. EXITING\n");
beaconev = { .fd = sbeacon, .rdwr = EVENT_READ, .process = ProcessTiVoBeacon };
event_module.add(&beaconev);
tivo_bcast.sin_family = AF_INET; tivo_bcast.sin_family = AF_INET;
tivo_bcast.sin_addr.s_addr = htonl(getBcastAddress()); tivo_bcast.sin_addr.s_addr = htonl(getBcastAddress());
tivo_bcast.sin_port = htons(2190); tivo_bcast.sin_port = htons(2190);
@ -1155,18 +1214,13 @@ main(int argc, char **argv)
/* main loop */ /* main loop */
while (!quitting) while (!quitting)
{ {
if (gettimeofday(&timeofday, 0) < 0)
DPRINTF(E_FATAL, L_GENERAL, "gettimeofday(): %s\n", strerror(errno));
/* Check if we need to send SSDP NOTIFY messages and do it if /* Check if we need to send SSDP NOTIFY messages and do it if
* needed */ * needed */
if (gettimeofday(&timeofday, 0) < 0) tv = lastnotifytime;
{ tv.tv_sec += runtime_vars.notify_interval;
DPRINTF(E_ERROR, L_GENERAL, "gettimeofday(): %s\n", strerror(errno)); if (timevalcmp(&timeofday, &tv, >=))
timeout.tv_sec = runtime_vars.notify_interval;
timeout.tv_usec = 0;
}
else
{
/* the comparison is not very precise but who cares ? */
if (timeofday.tv_sec >= (lastnotifytime.tv_sec + runtime_vars.notify_interval))
{ {
DPRINTF(E_DEBUG, L_SSDP, "Sending SSDP notifies\n"); DPRINTF(E_DEBUG, L_SSDP, "Sending SSDP notifies\n");
for (i = 0; i < n_lan_addr; i++) for (i = 0; i < n_lan_addr; i++)
@ -1174,45 +1228,44 @@ main(int argc, char **argv)
SendSSDPNotifies(lan_addr[i].snotify, lan_addr[i].str, SendSSDPNotifies(lan_addr[i].snotify, lan_addr[i].str,
runtime_vars.port, runtime_vars.notify_interval); runtime_vars.port, runtime_vars.notify_interval);
} }
memcpy(&lastnotifytime, &timeofday, sizeof(struct timeval)); lastnotifytime = timeofday;
timeout.tv_sec = runtime_vars.notify_interval; timeout = runtime_vars.notify_interval * 1000;
timeout.tv_usec = 0;
} }
else else
{ {
timeout.tv_sec = lastnotifytime.tv_sec + runtime_vars.notify_interval timevalsub(&tv, &timeofday);
- timeofday.tv_sec; timeout = tv.tv_sec * 1000 + tv.tv_usec / 1000;
if (timeofday.tv_usec > lastnotifytime.tv_usec)
{
timeout.tv_usec = 1000000 + lastnotifytime.tv_usec
- timeofday.tv_usec;
timeout.tv_sec--;
}
else
timeout.tv_usec = lastnotifytime.tv_usec - timeofday.tv_usec;
} }
#ifdef TIVO_SUPPORT #ifdef TIVO_SUPPORT
if (sbeacon >= 0) if (sbeacon >= 0)
{ {
if (timeofday.tv_sec >= (lastbeacontime.tv_sec + beacon_interval)) u_long beacontimeout;
tv = lastbeacontime;
tv.tv_sec += beacon_interval;
if (timevalcmp(&timeofday, &tv, >=))
{ {
sendBeaconMessage(sbeacon, &tivo_bcast, sizeof(struct sockaddr_in), 1); sendBeaconMessage(sbeacon, &tivo_bcast, sizeof(struct sockaddr_in), 1);
memcpy(&lastbeacontime, &timeofday, sizeof(struct timeval)); lastbeacontime = timeofday;
if (timeout.tv_sec > beacon_interval) beacontimeout = beacon_interval * 1000;
{ if (timeout > beacon_interval * 1000)
timeout.tv_sec = beacon_interval; timeout = beacon_interval * 1000;
timeout.tv_usec = 0; /* Beacons should be sent every 5 seconds or
} * so for the first minute, then every minute
/* Beacons should be sent every 5 seconds or so for the first minute, * or so thereafter. */
* then every minute or so thereafter. */
if (beacon_interval == 5 && (timeofday.tv_sec - startup_time) > 60) if (beacon_interval == 5 && (timeofday.tv_sec - startup_time) > 60)
beacon_interval = 60; beacon_interval = 60;
} }
else if (timeout.tv_sec > (lastbeacontime.tv_sec + beacon_interval + 1 - timeofday.tv_sec)) else
timeout.tv_sec = lastbeacontime.tv_sec + beacon_interval - timeofday.tv_sec; {
timevalsub(&tv, &timeofday);
beacontimeout = tv.tv_sec * 1000 +
tv.tv_usec / 1000;
}
if (timeout > beacontimeout)
timeout = beacontimeout;
} }
#endif #endif
}
if (GETFLAG(SCANNING_MASK)) if (GETFLAG(SCANNING_MASK))
{ {
@ -1224,75 +1277,16 @@ main(int argc, char **argv)
} }
} }
/* select open sockets (SSDP, HTTP listen, and all HTTP soap sockets) */ event_module.process(timeout);
FD_ZERO(&readset); if (quitting)
goto shutdown;
if (sssdp >= 0) upnpevents_gc();
{
FD_SET(sssdp, &readset);
max_fd = MAX(max_fd, sssdp);
}
if (shttpl >= 0)
{
FD_SET(shttpl, &readset);
max_fd = MAX(max_fd, shttpl);
}
#ifdef TIVO_SUPPORT
if (sbeacon >= 0)
{
FD_SET(sbeacon, &readset);
max_fd = MAX(max_fd, sbeacon);
}
#endif
if (smonitor >= 0)
{
FD_SET(smonitor, &readset);
max_fd = MAX(max_fd, smonitor);
}
i = 0; /* active HTTP connections count */
for (e = upnphttphead.lh_first; e != NULL; e = e->entries.le_next)
{
if ((e->socket >= 0) && (e->state <= 2))
{
FD_SET(e->socket, &readset);
max_fd = MAX(max_fd, e->socket);
i++;
}
}
FD_ZERO(&writeset);
upnpevents_selectfds(&readset, &writeset, &max_fd);
ret = select(max_fd+1, &readset, &writeset, 0, &timeout);
if (ret < 0)
{
if(quitting) goto shutdown;
if(errno == EINTR) continue;
DPRINTF(E_ERROR, L_GENERAL, "select(all): %s\n", strerror(errno));
DPRINTF(E_FATAL, L_GENERAL, "Failed to select open sockets. EXITING\n");
}
upnpevents_processfds(&readset, &writeset);
/* process SSDP packets */
if (sssdp >= 0 && FD_ISSET(sssdp, &readset))
{
/*DPRINTF(E_DEBUG, L_GENERAL, "Received SSDP Packet\n");*/
ProcessSSDPRequest(sssdp, (unsigned short)runtime_vars.port);
}
#ifdef TIVO_SUPPORT
if (sbeacon >= 0 && FD_ISSET(sbeacon, &readset))
{
/*DPRINTF(E_DEBUG, L_GENERAL, "Received UDP Packet\n");*/
ProcessTiVoBeacon(sbeacon);
}
#endif
if (smonitor >= 0 && FD_ISSET(smonitor, &readset))
{
ProcessMonitorEvent(smonitor);
}
/* increment SystemUpdateID if the content database has changed, /* increment SystemUpdateID if the content database has changed,
* and if there is an active HTTP connection, at most once every 2 seconds */ * and if there is an active HTTP connection, at most once every 2 seconds */
if (i && (timeofday.tv_sec >= (lastupdatetime + 2))) if (!LIST_EMPTY(&upnphttphead) &&
(timeofday.tv_sec >= (lastupdatetime + 2)))
{ {
if (GETFLAG(SCANNING_MASK)) if (GETFLAG(SCANNING_MASK))
{ {
@ -1311,48 +1305,6 @@ main(int argc, char **argv)
lastupdatetime = timeofday.tv_sec; lastupdatetime = timeofday.tv_sec;
} }
} }
/* process active HTTP connections */
for (e = upnphttphead.lh_first; e != NULL; e = e->entries.le_next)
{
if ((e->socket >= 0) && (e->state <= 2) && (FD_ISSET(e->socket, &readset)))
Process_upnphttp(e);
}
/* process incoming HTTP connections */
if (shttpl >= 0 && FD_ISSET(shttpl, &readset))
{
int shttp;
socklen_t clientnamelen;
struct sockaddr_in clientname;
clientnamelen = sizeof(struct sockaddr_in);
shttp = accept(shttpl, (struct sockaddr *)&clientname, &clientnamelen);
if (shttp<0)
{
DPRINTF(E_ERROR, L_GENERAL, "accept(http): %s\n", strerror(errno));
}
else
{
struct upnphttp * tmp = 0;
DPRINTF(E_DEBUG, L_GENERAL, "HTTP connection from %s:%d\n",
inet_ntoa(clientname.sin_addr),
ntohs(clientname.sin_port) );
/*if (fcntl(shttp, F_SETFL, O_NONBLOCK) < 0) {
DPRINTF(E_ERROR, L_GENERAL, "fcntl F_SETFL, O_NONBLOCK\n");
}*/
/* Create a new upnphttp object and add it to
* the active upnphttp object list */
tmp = New_upnphttp(shttp);
if (tmp)
{
tmp->clientaddr = clientname.sin_addr;
LIST_INSERT_HEAD(&upnphttphead, tmp, entries);
}
else
{
DPRINTF(E_ERROR, L_GENERAL, "New_upnphttp() failed\n");
close(shttp);
}
}
}
/* delete finished HTTP connections */ /* delete finished HTTP connections */
for (e = upnphttphead.lh_first; e != NULL; e = next) for (e = upnphttphead.lh_first; e != NULL; e = next)
{ {

13
minissdp.c
View File

@ -42,6 +42,7 @@
#include <arpa/inet.h> #include <arpa/inet.h>
#include <errno.h> #include <errno.h>
#include "event.h"
#include "minidlnapath.h" #include "minidlnapath.h"
#include "upnphttp.h" #include "upnphttp.h"
#include "upnpglobalvars.h" #include "upnpglobalvars.h"
@ -482,8 +483,9 @@ close:
/* ProcessSSDPRequest() /* ProcessSSDPRequest()
* process SSDP M-SEARCH requests and responds to them */ * process SSDP M-SEARCH requests and responds to them */
void void
ProcessSSDPRequest(int s, unsigned short port) ProcessSSDPRequest(struct event *ev)
{ {
int s = ev->fd;
int n; int n;
char bufr[1500]; char bufr[1500];
struct sockaddr_in sendername; struct sockaddr_in sendername;
@ -724,8 +726,8 @@ ProcessSSDPRequest(int s, unsigned short port)
break; break;
} }
_usleep(13000, 20000); _usleep(13000, 20000);
SendSSDPResponse(s, sendername, i, SendSSDPResponse(s, sendername, i, host,
host, port, len_r); (unsigned short)runtime_vars.port, len_r);
return; return;
} }
/* Responds to request with ST: ssdp:all */ /* Responds to request with ST: ssdp:all */
@ -736,8 +738,9 @@ ProcessSSDPRequest(int s, unsigned short port)
for (i=0; known_service_types[i]; i++) for (i=0; known_service_types[i]; i++)
{ {
l = strlen(known_service_types[i]); l = strlen(known_service_types[i]);
SendSSDPResponse(s, sendername, i, SendSSDPResponse(s, sendername, i, host,
host, port, len_r); (unsigned short)runtime_vars.port,
len_r);
} }
} }
} }

2
minissdp.h
View File

@ -35,7 +35,7 @@ int OpenAndConfSSDPNotifySocket(struct lan_addr_s *iface);
void SendSSDPNotifies(int s, const char *host, unsigned short port, unsigned int lifetime); void SendSSDPNotifies(int s, const char *host, unsigned short port, unsigned int lifetime);
void ProcessSSDPRequest(int s, unsigned short port); void ProcessSSDPRequest(struct event *ev);
int SendSSDPGoodbyes(int s); int SendSSDPGoodbyes(int s);

183
select.c Normal file
View File

@ -0,0 +1,183 @@
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <sys/types.h>
#include <sys/select.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "event.h"
#include "log.h"
static event_module_init_t select_init;
static event_module_fini_t select_fini;
static event_module_add_t select_add;
static event_module_add_t select_del;
static event_module_process_t select_process;
static fd_set master_read_fd_set;
static fd_set master_write_fd_set;
static fd_set work_read_fd_set;
static fd_set work_write_fd_set;
static struct event **events;
static int nevents;
static int max_fd;
struct event_module event_module = {
.add = select_add,
.del = select_del,
.enable = select_add,
.disable = select_del,
.process = select_process,
.init = select_init,
.fini = select_fini,
};
static int
select_init(void)
{
events = calloc(FD_SETSIZE, sizeof(struct event *));
if (events == NULL)
return (ENOMEM);
FD_ZERO(&master_read_fd_set);
FD_ZERO(&master_write_fd_set);
max_fd = 0;
nevents = 0;
return (0);
}
static void
select_fini(void)
{
free(events);
events = NULL;
}
static int
select_add(struct event *ev)
{
assert(ev->fd <= FD_SETSIZE);
switch (ev->rdwr) {
case EVENT_READ:
FD_SET(ev->fd, &master_read_fd_set);
break;
case EVENT_WRITE:
FD_SET(ev->fd, &master_write_fd_set);
break;
case EVENT_RDWR:
FD_SET(ev->fd, &master_read_fd_set);
FD_SET(ev->fd, &master_write_fd_set);
break;
}
if (max_fd != -1 && max_fd < ev->fd)
max_fd = ev->fd;
events[nevents] = ev;
ev->index = nevents++;
return (0);
}
static int
select_del(struct event *ev)
{
assert(ev->fd <= FD_SETSIZE);
switch (ev->rdwr) {
case EVENT_READ:
FD_CLR(ev->fd, &master_read_fd_set);
break;
case EVENT_WRITE:
FD_CLR(ev->fd, &master_write_fd_set);
break;
case EVENT_RDWR:
FD_CLR(ev->fd, &master_read_fd_set);
FD_CLR(ev->fd, &master_write_fd_set);
break;
}
if (max_fd == ev->fd)
max_fd = -1;
if (ev->index < --nevents) {
struct event *ev0;
ev0 = events[nevents];
events[ev->index] = ev0;
ev0->index = ev->index;
}
ev->index = -1;
return (0);
}
static int
select_process(u_long msec)
{
struct timeval tv, *tp;
struct event *ev;
int ready;
/* Need to rescan for max_fd. */
if (max_fd == -1)
for (int i = 0; i < nevents; i++) {
if (max_fd < events[i]->fd)
max_fd = events[i]->fd;
}
tv.tv_sec = (long) (msec / 1000);
tv.tv_usec = (long) ((msec % 1000) * 1000);
tp = &tv;
work_read_fd_set = master_read_fd_set;
work_write_fd_set = master_write_fd_set;
ready = select(max_fd + 1, &work_read_fd_set, &work_write_fd_set, NULL, tp);
if (ready == -1) {
if (errno == EINTR)
return (errno);
DPRINTF(E_ERROR, L_GENERAL, "select(all): %s\n", strerror(errno));
DPRINTF(E_FATAL, L_GENERAL, "Failed to select open sockets. EXITING\n");
}
if (ready == 0)
return (0);
for (int i = 0; i < nevents; i++) {
ev = events[i];
switch (ev->rdwr) {
case EVENT_READ:
if (FD_ISSET(ev->fd, &work_read_fd_set))
ev->process(ev);
break;
case EVENT_WRITE:
if (FD_ISSET(ev->fd, &work_write_fd_set))
ev->process(ev);
break;
case EVENT_RDWR:
if (FD_ISSET(ev->fd, &work_read_fd_set) ||
FD_ISSET(ev->fd, &work_write_fd_set))
ev->process(ev);
break;
}
}
return (0);
}

136
upnpevents.c
View File

@ -59,9 +59,11 @@
#include <sys/param.h> #include <sys/param.h>
#include <netinet/in.h> #include <netinet/in.h>
#include <arpa/inet.h> #include <arpa/inet.h>
#include <assert.h>
#include <fcntl.h> #include <fcntl.h>
#include <errno.h> #include <errno.h>
#include "event.h"
#include "upnpevents.h" #include "upnpevents.h"
#include "minidlnapath.h" #include "minidlnapath.h"
#include "upnpglobalvars.h" #include "upnpglobalvars.h"
@ -82,10 +84,9 @@ struct subscriber {
}; };
struct upnp_event_notify { struct upnp_event_notify {
struct event ev;
LIST_ENTRY(upnp_event_notify) entries; LIST_ENTRY(upnp_event_notify) entries;
int s; /* socket */ enum { EConnecting,
enum { ECreated=1,
EConnecting,
ESending, ESending,
EWaitingForResponse, EWaitingForResponse,
EFinished, EFinished,
@ -101,8 +102,8 @@ struct upnp_event_notify {
}; };
/* prototypes */ /* prototypes */
static void static void upnp_event_create_notify(struct subscriber * sub);
upnp_event_create_notify(struct subscriber * sub); static void upnp_event_process_notify(struct event *ev);
/* Subscriber list */ /* Subscriber list */
LIST_HEAD(listhead, subscriber) subscriberlist = { NULL }; LIST_HEAD(listhead, subscriber) subscriberlist = { NULL };
@ -224,30 +225,35 @@ upnp_event_var_change_notify(enum subscriber_service_enum service)
} }
} }
/* create and add the notify object to the list */ /* create and add the notify object to the list, start connecting */
static void static void
upnp_event_create_notify(struct subscriber *sub) upnp_event_create_notify(struct subscriber *sub)
{ {
struct upnp_event_notify * obj; struct upnp_event_notify * obj;
int flags; int flags, s, i;
const char *p;
unsigned short port;
struct sockaddr_in addr;
assert(sub);
obj = calloc(1, sizeof(struct upnp_event_notify)); obj = calloc(1, sizeof(struct upnp_event_notify));
if(!obj) { if(!obj) {
DPRINTF(E_ERROR, L_HTTP, "%s: calloc(): %s\n", "upnp_event_create_notify", strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "%s: calloc(): %s\n", "upnp_event_create_notify", strerror(errno));
return; return;
} }
obj->sub = sub; obj->sub = sub;
obj->state = ECreated; s = socket(PF_INET, SOCK_STREAM, 0);
obj->s = socket(PF_INET, SOCK_STREAM, 0); if(s < 0) {
if(obj->s<0) {
DPRINTF(E_ERROR, L_HTTP, "%s: socket(): %s\n", "upnp_event_create_notify", strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "%s: socket(): %s\n", "upnp_event_create_notify", strerror(errno));
goto error; goto error;
} }
if((flags = fcntl(obj->s, F_GETFL, 0)) < 0) { if((flags = fcntl(s, F_GETFL, 0)) < 0) {
DPRINTF(E_ERROR, L_HTTP, "%s: fcntl(..F_GETFL..): %s\n", DPRINTF(E_ERROR, L_HTTP, "%s: fcntl(..F_GETFL..): %s\n",
"upnp_event_create_notify", strerror(errno)); "upnp_event_create_notify", strerror(errno));
goto error; goto error;
} }
if(fcntl(obj->s, F_SETFL, flags | O_NONBLOCK) < 0) { if(fcntl(s, F_SETFL, flags | O_NONBLOCK) < 0) {
DPRINTF(E_ERROR, L_HTTP, "%s: fcntl(..F_SETFL..): %s\n", DPRINTF(E_ERROR, L_HTTP, "%s: fcntl(..F_SETFL..): %s\n",
"upnp_event_create_notify", strerror(errno)); "upnp_event_create_notify", strerror(errno));
goto error; goto error;
@ -255,28 +261,9 @@ upnp_event_create_notify(struct subscriber * sub)
if(sub) if(sub)
sub->notify = obj; sub->notify = obj;
LIST_INSERT_HEAD(&notifylist, obj, entries); LIST_INSERT_HEAD(&notifylist, obj, entries);
return;
error:
if(obj->s >= 0)
close(obj->s);
free(obj);
}
static void
upnp_event_notify_connect(struct upnp_event_notify * obj)
{
int i;
const char * p;
unsigned short port;
struct sockaddr_in addr;
if(!obj)
return;
memset(&addr, 0, sizeof(addr)); memset(&addr, 0, sizeof(addr));
i = 0; i = 0;
if(obj->sub == NULL) {
obj->state = EError;
return;
}
p = obj->sub->callback; p = obj->sub->callback;
p += 7; /* http:// */ p += 7; /* http:// */
while(*p != '/' && *p != ':' && i < (sizeof(obj->addrstr)-1)) while(*p != '/' && *p != ':' && i < (sizeof(obj->addrstr)-1))
@ -306,12 +293,23 @@ upnp_event_notify_connect(struct upnp_event_notify * obj)
DPRINTF(E_DEBUG, L_HTTP, "%s: '%s' %hu '%s'\n", "upnp_event_notify_connect", DPRINTF(E_DEBUG, L_HTTP, "%s: '%s' %hu '%s'\n", "upnp_event_notify_connect",
obj->addrstr, port, obj->path); obj->addrstr, port, obj->path);
obj->state = EConnecting; obj->state = EConnecting;
if(connect(obj->s, (struct sockaddr *)&addr, sizeof(addr)) < 0) { if(connect(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
if(errno != EINPROGRESS && errno != EWOULDBLOCK) { if(errno != EINPROGRESS && errno != EWOULDBLOCK) {
DPRINTF(E_ERROR, L_HTTP, "%s: connect(): %s\n", "upnp_event_notify_connect", strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "%s: connect(): %s\n", "upnp_event_notify_connect", strerror(errno));
obj->state = EError; obj->state = EError;
} }
} else {
obj->ev = (struct event ){ .fd = s, .rdwr = EVENT_WRITE,
.process = upnp_event_process_notify, .data = obj };
event_module.add(&obj->ev);
} }
return;
error:
if(s >= 0)
close(s);
free(obj);
} }
static void upnp_event_prepare(struct upnp_event_notify * obj) static void upnp_event_prepare(struct upnp_event_notify * obj)
@ -331,10 +329,9 @@ static void upnp_event_prepare(struct upnp_event_notify * obj)
"%.*s\r\n"; "%.*s\r\n";
char * xml; char * xml;
int l; int l;
if(obj->sub == NULL) {
obj->state = EError; assert(obj->sub);
return;
}
switch(obj->sub->service) { switch(obj->sub->service) {
case EContentDirectory: case EContentDirectory:
xml = getVarsContentDirectory(&l); xml = getVarsContentDirectory(&l);
@ -364,30 +361,37 @@ static void upnp_event_send(struct upnp_event_notify * obj)
int i; int i;
//DEBUG DPRINTF(E_DEBUG, L_HTTP, "Sending UPnP Event:\n%s", obj->buffer+obj->sent); //DEBUG DPRINTF(E_DEBUG, L_HTTP, "Sending UPnP Event:\n%s", obj->buffer+obj->sent);
while( obj->sent < obj->tosend ) { while( obj->sent < obj->tosend ) {
i = send(obj->s, obj->buffer + obj->sent, obj->tosend - obj->sent, 0); i = send(obj->ev.fd, obj->buffer + obj->sent, obj->tosend - obj->sent, 0);
if(i<0) { if(i<0) {
DPRINTF(E_WARN, L_HTTP, "%s: send(): %s\n", "upnp_event_send", strerror(errno)); DPRINTF(E_WARN, L_HTTP, "%s: send(): %s\n", "upnp_event_send", strerror(errno));
obj->state = EError; obj->state = EError;
event_module.del(&obj->ev);
return; return;
} }
obj->sent += i; obj->sent += i;
} }
if(obj->sent == obj->tosend) if(obj->sent == obj->tosend) {
obj->state = EWaitingForResponse; obj->state = EWaitingForResponse;
event_module.del(&obj->ev);
obj->ev.rdwr = EVENT_READ;
event_module.add(&obj->ev);
}
} }
static void upnp_event_recv(struct upnp_event_notify * obj) static void upnp_event_recv(struct upnp_event_notify * obj)
{ {
int n; int n;
n = recv(obj->s, obj->buffer, obj->buffersize, 0); n = recv(obj->ev.fd, obj->buffer, obj->buffersize, 0);
if(n<0) { if(n<0) {
DPRINTF(E_ERROR, L_HTTP, "%s: recv(): %s\n", "upnp_event_recv", strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "%s: recv(): %s\n", "upnp_event_recv", strerror(errno));
obj->state = EError; obj->state = EError;
event_module.del(&obj->ev);
return; return;
} }
DPRINTF(E_DEBUG, L_HTTP, "%s: (%dbytes) %.*s\n", "upnp_event_recv", DPRINTF(E_DEBUG, L_HTTP, "%s: (%dbytes) %.*s\n", "upnp_event_recv",
n, n, obj->buffer); n, n, obj->buffer);
obj->state = EFinished; obj->state = EFinished;
event_module.del(&obj->ev);
if(obj->sub) if(obj->sub)
{ {
obj->sub->seq++; obj->sub->seq++;
@ -397,8 +401,10 @@ static void upnp_event_recv(struct upnp_event_notify * obj)
} }
static void static void
upnp_event_process_notify(struct upnp_event_notify * obj) upnp_event_process_notify(struct event *ev)
{ {
struct upnp_event_notify *obj = ev->data;
switch(obj->state) { switch(obj->state) {
case EConnecting: case EConnecting:
/* now connected or failed to connect */ /* now connected or failed to connect */
@ -412,66 +418,28 @@ upnp_event_process_notify(struct upnp_event_notify * obj)
upnp_event_recv(obj); upnp_event_recv(obj);
break; break;
case EFinished: case EFinished:
close(obj->s); close(obj->ev.fd);
obj->s = -1; obj->ev.fd = -1;
break; break;
default: default:
DPRINTF(E_ERROR, L_HTTP, "upnp_event_process_notify: unknown state\n"); DPRINTF(E_ERROR, L_HTTP, "upnp_event_process_notify: unknown state\n");
} }
} }
void upnpevents_selectfds(fd_set *readset, fd_set *writeset, int * max_fd) void upnpevents_gc(void)
{
struct upnp_event_notify * obj;
for(obj = notifylist.lh_first; obj != NULL; obj = obj->entries.le_next) {
DPRINTF(E_DEBUG, L_HTTP, "upnpevents_selectfds: %p %d %d\n",
obj, obj->state, obj->s);
if(obj->s >= 0) {
switch(obj->state) {
case ECreated:
upnp_event_notify_connect(obj);
if(obj->state != EConnecting)
break;
case EConnecting:
case ESending:
FD_SET(obj->s, writeset);
if(obj->s > *max_fd)
*max_fd = obj->s;
break;
case EWaitingForResponse:
FD_SET(obj->s, readset);
if(obj->s > *max_fd)
*max_fd = obj->s;
break;
default:
break;
}
}
}
}
void upnpevents_processfds(fd_set *readset, fd_set *writeset)
{ {
struct upnp_event_notify * obj; struct upnp_event_notify * obj;
struct upnp_event_notify * next; struct upnp_event_notify * next;
struct subscriber * sub; struct subscriber * sub;
struct subscriber * subnext; struct subscriber * subnext;
time_t curtime; time_t curtime;
for(obj = notifylist.lh_first; obj != NULL; obj = obj->entries.le_next) {
DPRINTF(E_DEBUG, L_HTTP, "%s: %p %d %d %d %d\n",
"upnpevents_processfds", obj, obj->state, obj->s,
FD_ISSET(obj->s, readset), FD_ISSET(obj->s, writeset));
if(obj->s >= 0) {
if(FD_ISSET(obj->s, readset) || FD_ISSET(obj->s, writeset))
upnp_event_process_notify(obj);
}
}
obj = notifylist.lh_first; obj = notifylist.lh_first;
while(obj != NULL) { while(obj != NULL) {
next = obj->entries.le_next; next = obj->entries.le_next;
if(obj->state == EError || obj->state == EFinished) { if(obj->state == EError || obj->state == EFinished) {
if(obj->s >= 0) { if(obj->ev.fd >= 0) {
close(obj->s); close(obj->ev.fd);
} }
if(obj->sub) if(obj->sub)
obj->sub->notify = NULL; obj->sub->notify = NULL;

4
upnpevents.h
View File

@ -63,12 +63,10 @@ upnpevents_addSubscriber(const char * eventurl,
int upnpevents_removeSubscriber(const char * sid, int sidlen); int upnpevents_removeSubscriber(const char * sid, int sidlen);
void upnpevents_removeSubscribers(void); void upnpevents_removeSubscribers(void);
void upnpevents_gc(void);
int renewSubscription(const char * sid, int sidlen, int timeout); int renewSubscription(const char * sid, int sidlen, int timeout);
void upnpevents_selectfds(fd_set *readset, fd_set *writeset, int * max_fd);
void upnpevents_processfds(fd_set *readset, fd_set *writeset);
#ifdef USE_MINIUPNPDCTL #ifdef USE_MINIUPNPDCTL
void write_events_details(int s); void write_events_details(int s);
#endif #endif

36
upnphttp.c
View File

@ -64,6 +64,7 @@
#include <limits.h> #include <limits.h>
#include "config.h" #include "config.h"
#include "event.h"
#include "upnpglobalvars.h" #include "upnpglobalvars.h"
#include "upnphttp.h" #include "upnphttp.h"
#include "upnpdescgen.h" #include "upnpdescgen.h"
@ -101,6 +102,7 @@ static void SendResp_caption(struct upnphttp *, char * url);
static void SendResp_resizedimg(struct upnphttp *, char * url); static void SendResp_resizedimg(struct upnphttp *, char * url);
static void SendResp_thumbnail(struct upnphttp *, char * url); static void SendResp_thumbnail(struct upnphttp *, char * url);
static void SendResp_dlnafile(struct upnphttp *, char * url); static void SendResp_dlnafile(struct upnphttp *, char * url);
static void Process_upnphttp(struct event *ev);
struct upnphttp * struct upnphttp *
New_upnphttp(int s) New_upnphttp(int s)
@ -112,18 +114,21 @@ New_upnphttp(int s)
if(ret == NULL) if(ret == NULL)
return NULL; return NULL;
memset(ret, 0, sizeof(struct upnphttp)); memset(ret, 0, sizeof(struct upnphttp));
ret->socket = s; ret->ev = (struct event ){ .fd = s, .rdwr = EVENT_READ, .process = Process_upnphttp, .data = ret };
event_module.add(&ret->ev);
return ret; return ret;
} }
void void
CloseSocket_upnphttp(struct upnphttp * h) CloseSocket_upnphttp(struct upnphttp * h)
{ {
if(close(h->socket) < 0)
event_module.del(&h->ev);
if(close(h->ev.fd) < 0)
{ {
DPRINTF(E_ERROR, L_HTTP, "CloseSocket_upnphttp: close(%d): %s\n", h->socket, strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "CloseSocket_upnphttp: close(%d): %s\n", h->ev.fd, strerror(errno));
} }
h->socket = -1; h->ev.fd = -1;
h->state = 100; h->state = 100;
} }
@ -132,7 +137,7 @@ Delete_upnphttp(struct upnphttp * h)
{ {
if(h) if(h)
{ {
if(h->socket >= 0) if(h->ev.fd >= 0)
CloseSocket_upnphttp(h); CloseSocket_upnphttp(h);
free(h->req_buf); free(h->req_buf);
free(h->res_buf); free(h->res_buf);
@ -1039,18 +1044,17 @@ ProcessHttpQuery_upnphttp(struct upnphttp * h)
} }
} }
static void
void Process_upnphttp(struct event *ev)
Process_upnphttp(struct upnphttp * h)
{ {
char buf[2048]; char buf[2048];
struct upnphttp *h = ev->data;
int n; int n;
if(!h)
return;
switch(h->state) switch(h->state)
{ {
case 0: case 0:
n = recv(h->socket, buf, 2048, 0); n = recv(h->ev.fd, buf, 2048, 0);
if(n<0) if(n<0)
{ {
DPRINTF(E_ERROR, L_HTTP, "recv (state0): %s\n", strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "recv (state0): %s\n", strerror(errno));
@ -1096,7 +1100,7 @@ Process_upnphttp(struct upnphttp * h)
break; break;
case 1: case 1:
case 2: case 2:
n = recv(h->socket, buf, sizeof(buf), 0); n = recv(h->ev.fd, buf, sizeof(buf), 0);
if(n < 0) if(n < 0)
{ {
DPRINTF(E_ERROR, L_HTTP, "recv (state%d): %s\n", h->state, strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "recv (state%d): %s\n", h->state, strerror(errno));
@ -1223,7 +1227,7 @@ SendResp_upnphttp(struct upnphttp * h)
{ {
int n; int n;
DPRINTF(E_DEBUG, L_HTTP, "HTTP RESPONSE: %.*s\n", h->res_buflen, h->res_buf); DPRINTF(E_DEBUG, L_HTTP, "HTTP RESPONSE: %.*s\n", h->res_buflen, h->res_buf);
n = send(h->socket, h->res_buf, h->res_buflen, 0); n = send(h->ev.fd, h->res_buf, h->res_buflen, 0);
if(n<0) if(n<0)
{ {
DPRINTF(E_ERROR, L_HTTP, "send(res_buf): %s\n", strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "send(res_buf): %s\n", strerror(errno));
@ -1241,7 +1245,7 @@ send_data(struct upnphttp * h, char * header, size_t size, int flags)
{ {
int n; int n;
n = send(h->socket, header, size, flags); n = send(h->ev.fd, header, size, flags);
if(n<0) if(n<0)
{ {
DPRINTF(E_ERROR, L_HTTP, "send(res_buf): %s\n", strerror(errno)); DPRINTF(E_ERROR, L_HTTP, "send(res_buf): %s\n", strerror(errno));
@ -1275,7 +1279,7 @@ send_file(struct upnphttp * h, int sendfd, off_t offset, off_t end_offset)
if( try_sendfile ) if( try_sendfile )
{ {
send_size = ( ((end_offset - offset) < MAX_BUFFER_SIZE) ? (end_offset - offset + 1) : MAX_BUFFER_SIZE); send_size = ( ((end_offset - offset) < MAX_BUFFER_SIZE) ? (end_offset - offset + 1) : MAX_BUFFER_SIZE);
ret = sys_sendfile(h->socket, sendfd, &offset, send_size); ret = sys_sendfile(h->ev.fd, sendfd, &offset, send_size);
if( ret == -1 ) if( ret == -1 )
{ {
DPRINTF(E_DEBUG, L_HTTP, "sendfile error :: error no. %d [%s]\n", errno, strerror(errno)); DPRINTF(E_DEBUG, L_HTTP, "sendfile error :: error no. %d [%s]\n", errno, strerror(errno));
@ -1305,7 +1309,7 @@ send_file(struct upnphttp * h, int sendfd, off_t offset, off_t end_offset)
else else
break; break;
} }
ret = write(h->socket, buf, ret); ret = write(h->ev.fd, buf, ret);
if( ret == -1 ) { if( ret == -1 ) {
DPRINTF(E_DEBUG, L_HTTP, "write error :: error no. %d [%s]\n", errno, strerror(errno)); DPRINTF(E_DEBUG, L_HTTP, "write error :: error no. %d [%s]\n", errno, strerror(errno));
if( errno == EAGAIN ) if( errno == EAGAIN )

6
upnphttp.h
View File

@ -75,7 +75,7 @@ enum httpCommands {
}; };
struct upnphttp { struct upnphttp {
int socket; struct event ev;
struct in_addr clientaddr; /* client address */ struct in_addr clientaddr; /* client address */
int iface; int iface;
int state; int state;
@ -144,10 +144,6 @@ CloseSocket_upnphttp(struct upnphttp *);
void void
Delete_upnphttp(struct upnphttp *); Delete_upnphttp(struct upnphttp *);
/* Process_upnphttp() */
void
Process_upnphttp(struct upnphttp *);
/* BuildHeader_upnphttp() /* BuildHeader_upnphttp()
* build the header for the HTTP Response * build the header for the HTTP Response
* also allocate the buffer for body data */ * also allocate the buffer for body data */

1
upnpsoap.c
View File

@ -61,6 +61,7 @@
#include <netdb.h> #include <netdb.h>
#include <ctype.h> #include <ctype.h>
#include "event.h"
#include "upnpglobalvars.h" #include "upnpglobalvars.h"
#include "utils.h" #include "utils.h"
#include "upnphttp.h" #include "upnphttp.h"

1
uuid.c
View File

@ -39,6 +39,7 @@
#include <sys/syscall.h> #include <sys/syscall.h>
#endif #endif
#include "event.h"
#include "uuid.h" #include "uuid.h"
#include "getifaddr.h" #include "getifaddr.h"
#include "log.h" #include "log.h"