--- /dev/null
+/* IOEngine.h - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _IOEngine_h
+#define _IOEngine_h
+#include "IOHandler.h"
+
+struct IODescriptor;
+enum IOType;
+enum IOStatus;
+enum IOEventType;
+
+#define timeval_is_bigger(x,y) ((x->tv_sec > y->tv_sec) || (x->tv_sec == y->tv_sec && x->tv_usec > y->tv_usec))
+#define timeval_is_smaler(x,y) ((x->tv_sec < y->tv_sec) || (x->tv_sec == y->tv_sec && x->tv_usec < y->tv_usec))
+
+extern struct IODescriptor *first_descriptor;
+extern struct IODescriptor *timer_priority;
+
+struct IOEngine {
+ const char *name;
+ int (*init)(void);
+ void (*add)(struct IODescriptor *iofd);
+ void (*remove)(struct IODescriptor *iofd);
+ void (*update)(struct IODescriptor *iofd);
+ void (*loop)(struct timeval *timeout);
+ void (*cleanup)(void);
+};
+
+#define iohandler_wants_writes(IOFD) ((IOFD->writebuf.bufpos && !IOFD->ssl_hs_read) || IOFD->state == IO_CONNECTING || IOFD->ssl_hs_write)
+
+void iohandler_log(enum IOLogType type, char *text, ...);
+void iohandler_events(struct IODescriptor *iofd, int readable, int writeable);
+char *iohandler_iotype_name(enum IOType type);
+char *iohandler_iostatus_name(enum IOStatus status);
+char *iohandler_ioeventtype_name(enum IOEventType type);
+
+#endif
--- /dev/null
+/* IOEngine_epoll.c - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "IOEngine.h"
+
+#ifdef HAVE_SYS_EPOLL_H
+#include <sys/epoll.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#define MAX_EVENTS 32
+
+static int epoll_fd;
+
+static int engine_epoll_init() {
+ epoll_fd = epoll_create(1024);
+ if (epoll_fd < 0)
+ return 0;
+ return 1;
+}
+
+static void engine_epoll_add(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ //add descriptor to the epoll queue
+ struct epoll_event evt;
+ int res;
+
+ evt.events = EPOLLHUP | EPOLLIN | (iohandler_wants_writes(iofd) ? EPOLLOUT : 0);
+ evt.data.ptr = iofd;
+ res = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, iofd->fd, &evt);
+ if(res < 0) {
+ iohandler_log(IOLOG_ERROR, "could not add IODescriptor %d to epoll queue. (returned: %d)", iofd->fd, res);
+ }
+}
+
+static void engine_epoll_remove(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ struct epoll_event evt;
+ epoll_ctl(epoll_fd, EPOLL_CTL_DEL, iofd->fd, &evt);
+}
+
+static void engine_epoll_update(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ struct epoll_event evt;
+ int res;
+
+ evt.events = EPOLLHUP | EPOLLIN | (iohandler_wants_writes(iofd) ? EPOLLOUT : 0);
+ evt.data.ptr = iofd;
+ res = epoll_ctl(epoll_fd, EPOLL_CTL_MOD, iofd->fd, &evt);
+ if(res < 0) {
+ iohandler_log(IOLOG_ERROR, "could not update IODescriptor %d in epoll queue. (returned: %d)", iofd->fd, res);
+ }
+}
+
+static void engine_epoll_loop(struct timeval *timeout) {
+ struct epoll_event evts[MAX_EVENTS];
+ struct timeval now, tdiff;
+ int msec;
+ int events;
+ int epoll_result;
+
+ gettimeofday(&now, NULL);
+
+ while(timer_priority) {
+ tdiff.tv_sec = timer_priority->timeout.tv_sec - now.tv_sec;
+ tdiff.tv_usec = timer_priority->timeout.tv_usec - now.tv_usec;
+ if(tdiff.tv_sec < 0 || (tdiff.tv_sec == 0 && tdiff.tv_usec <= 0)) {
+ iohandler_events(timer_priority, 0, 0);
+ iohandler_close(timer_priority); //also sets timer_priority to the next timed element
+ continue;
+ } else if(tdiff.tv_usec < 0) {
+ tdiff.tv_sec--;
+ tdiff.tv_usec += 1000000; //1 sec
+ }
+ if(timeval_is_smaler((&tdiff), timeout)) {
+ timeout->tv_sec = tdiff.tv_sec;
+ timeout->tv_usec = tdiff.tv_usec;
+ }
+ break;
+ }
+
+ msec = timeout ? ((timeout->tv_sec * 1000 + timeout->tv_usec / 1000) + (timeout->tv_usec % 1000 != 0 ? 1 : 0)) : -1;
+
+ //select system call
+ epoll_result = epoll_wait(epoll_fd, evts, MAX_EVENTS, msec);
+
+ if (epoll_result < 0) {
+ if (errno != EINTR) {
+ iohandler_log(IOLOG_FATAL, "epoll_wait() failed with errno %d: %s", errno, strerror(errno));
+ return;
+ }
+ } else {
+ int i;
+ for(i = 0; i < epoll_result; i++) {
+ events = evts[i].events;
+ iohandler_events(evts[i].data.ptr, (events & (EPOLLIN | EPOLLHUP)), (events & EPOLLOUT));
+ }
+ }
+
+ //check timers
+ while(timer_priority) {
+ tdiff.tv_sec = timer_priority->timeout.tv_sec - now.tv_sec;
+ tdiff.tv_usec = timer_priority->timeout.tv_usec - now.tv_usec;
+ if(tdiff.tv_sec < 0 || (tdiff.tv_sec == 0 && tdiff.tv_usec <= 0)) {
+ iohandler_events(timer_priority, 0, 0);
+ iohandler_close(timer_priority); //also sets timer_priority to the next timed element
+ continue;
+ }
+ break;
+ }
+
+}
+
+static void engine_epoll_cleanup() {
+ close(epoll_fd);
+}
+
+struct IOEngine engine_epoll = {
+ .name = "epoll",
+ .init = engine_epoll_init,
+ .add = engine_epoll_add,
+ .remove = engine_epoll_remove,
+ .update = engine_epoll_update,
+ .loop = engine_epoll_loop,
+ .cleanup = engine_epoll_cleanup,
+};
+
+#else
+
+struct IOEngine engine_epoll = {
+ .name = "epoll",
+ .init = NULL,
+ .add = NULL,
+ .remove = NULL,
+ .update = NULL,
+ .loop = NULL,
+ .cleanup = NULL,
+};
+
+#endif
--- /dev/null
+/* IOengine_kevent.c - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "IOEngine.h"
+
+#ifdef HAVE_SYS_EVENT_H
+#include <sys/event.h>
+
+#define MAX_EVENTS 32
+
+static int kevent_fd;
+
+static int engine_kevent_init() {
+ kevent_fd = kqueue();
+ if (kevent_fd < 0)
+ return 0;
+ return 1;
+}
+
+static void engine_kevent_add(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ //add descriptor to the kevent queue
+ struct kevent changes[2];
+ int nchanges = 0;
+ int res;
+
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_READ, EV_ADD, 0, 0, iofd);
+ if (iohandler_wants_writes(iofd))
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_WRITE, EV_ADD, 0, 0, iofd);
+
+ res = kevent(kevent_fd, changes, nchanges, NULL, 0, NULL);
+ if(res < 0)
+ iohandler_log(IOLOG_ERROR, "could not add IODescriptor %d to kevent queue. (returned: %d)", res);
+ }
+}
+
+static void engine_kevent_remove(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ struct kevent changes[2];
+ int nchanges = 0;
+
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_READ, EV_DELETE, 0, 0, iofd);
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_WRITE, EV_DELETE, 0, 0, iofd);
+ kevent(kevent_fd, changes, nchanges, NULL, 0, NULL);
+}
+
+static void engine_kevent_update(struct IODescriptor *iofd) {
+ if(iofd->type == IOTYPE_TIMER) return;
+ struct kevent changes[2];
+ int nchanges = 0;
+ int res;
+
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_READ, EV_ADD, 0, 0, iofd);
+ EV_SET(&changes[nchanges++], iofd->fd, EVFILT_WRITE, iohandler_wants_writes(iofd) ? EV_ADD : EV_DELETE, 0, 0, iofd);
+
+ res = kevent(kevent_fd, changes, nchanges, NULL, 0, NULL);
+ if(res < 0) {
+ iohandler_log(IOLOG_ERROR, "could not update IODescriptor %d in kevent queue. (returned: %d)", res);
+ }
+}
+
+static void engine_kevent_loop(struct timeval *timeout) {
+ struct kevent evts[MAX_EVENTS];
+ struct timeval now, tdiff;
+ struct timespec ts, *ptr
+ int msec;
+ int events;
+ int kevent_result;
+
+ gettimeofday(&now, NULL);
+
+ while(timer_priority) {
+ tdiff.tv_sec = timer_priority->timeout.tv_sec - now.tv_sec;
+ tdiff.tv_usec = timer_priority->timeout.tv_usec - now.tv_usec;
+ if(tdiff.tv_sec < 0 || (tdiff.tv_sec == 0 && tdiff.tv_usec <= 0)) {
+ iohandler_events(timer_priority, 0, 0);
+ iohandler_close(timer_priority); //also sets timer_priority to the next timed element
+ continue;
+ } else if(tdiff.tv_usec < 0) {
+ tdiff.tv_sec--;
+ tdiff.tv_usec += 1000000; //1 sec
+ }
+ if(timeval_is_smaler((&tdiff), timeout)) {
+ timeout->tv_sec = tdiff.tv_sec;
+ timeout->tv_usec = tdiff.tv_usec;
+ }
+ break;
+ }
+
+ if (timeout) {
+ ts.tv_sec = timeout->tv_sec;
+ ts.tv_nsec = timeout->tv_usec * 1000;
+ pts = &ts;
+ } else {
+ pts = NULL;
+ }
+
+ //select system call
+ kevent_result = kevent(kq_fd, NULL, 0, events, MAX_EVENTS, pts);
+
+ if (kevent_result < 0) {
+ if (errno != EINTR) {
+ iohandler_log(IOLOG_FATAL, "kevent() failed with errno %d: %s", errno, strerror(errno));
+ return;
+ }
+ } else {
+ int i;
+ for(i = 0; i < kevent_result; i++)
+ iohandler_events(evts[i].udata, (evts[i].filter == EVFILT_READ), (evts[i].filter == EVFILT_WRITE));
+ }
+
+ //check timers
+ while(timer_priority) {
+ tdiff.tv_sec = timer_priority->timeout.tv_sec - now.tv_sec;
+ tdiff.tv_usec = timer_priority->timeout.tv_usec - now.tv_usec;
+ if(tdiff.tv_sec < 0 || (tdiff.tv_sec == 0 && tdiff.tv_usec <= 0)) {
+ iohandler_events(timer_priority, 0, 0);
+ iohandler_close(timer_priority); //also sets timer_priority to the next timed element
+ continue;
+ }
+ break;
+ }
+
+}
+
+static void engine_kevent_cleanup() {
+ close(kevent_fd);
+}
+
+struct IOEngine engine_kevent = {
+ .name = "kevent",
+ .init = engine_kevent_init,
+ .add = engine_kevent_add,
+ .remove = engine_kevent_remove,
+ .update = engine_kevent_update,
+ .loop = engine_kevent_loop,
+ .cleanup = engine_kevent_cleanup,
+};
+
+#else
+
+struct IOEngine engine_kevent = {
+ .name = "kevent",
+ .init = NULL,
+ .add = NULL,
+ .remove = NULL,
+ .update = NULL,
+ .loop = NULL,
+ .cleanup = NULL,
+};
+
+#endif
--- /dev/null
+/* IOEngine_select.c - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "IOEngine.h"
+#ifdef WIN32
+#define _WIN32_WINNT 0x501
+#include <windows.h>
+#include <winsock2.h>
+#else
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#endif
+
+static int engine_select_init() {
+ /* empty */
+ return 1;
+}
+
+static void engine_select_add(struct IODescriptor *iofd) {
+ #ifdef WIN32
+ if(iofd->type == IOTYPE_STDIN)
+ SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE),ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT);
+ #endif
+ /* empty */
+}
+
+static void engine_select_remove(struct IODescriptor *iofd) {
+ /* empty */
+}
+
+static void engine_select_update(struct IODescriptor *iofd) {
+ /* empty */
+}
+
+static void engine_select_loop(struct timeval *timeout) {
+ fd_set read_fds;
+ fd_set write_fds;
+ unsigned int fds_size = 0;
+ struct IODescriptor *iofd, *tmp_iofd;
+ struct timeval now, tdiff;
+ int select_result;
+
+ gettimeofday(&now, NULL);
+
+ //clear fds
+ FD_ZERO(&read_fds);
+ FD_ZERO(&write_fds);
+
+ for(iofd = first_descriptor; iofd; iofd = tmp_iofd) {
+ tmp_iofd = iofd->next;
+ if(iofd->type == IOTYPE_STDIN) {
+ #ifdef WIN32
+ //WIN32 doesn't support stdin within select
+ //just try to read the single events from the console
+ DWORD dwRead;
+ INPUT_RECORD inRecords[128];
+ unsigned int i;
+ int read_bytes = 0;
+ GetNumberOfConsoleInputEvents(GetStdHandle(STD_INPUT_HANDLE), &dwRead);
+ if(dwRead)
+ ReadConsoleInput(GetStdHandle(STD_INPUT_HANDLE), &inRecords[0], 128, &dwRead);
+ for (i = 0; i < dwRead; ++i) {
+ if (inRecords[i].EventType == KEY_EVENT) {
+ const char c = inRecords[i].Event.KeyEvent.uChar.AsciiChar;
+ if (inRecords[i].Event.KeyEvent.bKeyDown && c != 0) {
+ iofd->readbuf.buffer[iofd->readbuf.bufpos + read_bytes] = c;
+ read_bytes++;
+ }
+ }
+ }
+ if(read_bytes)
+ iohandler_events(iofd, read_bytes, 0);
+ if(read_bytes >= 128) {
+ timeout->tv_sec = 0;
+ timeout->tv_usec = 1;
+ //minimal timeout
+ } else {
+ timeout->tv_sec = 0;
+ timeout->tv_usec = 100000;
+ }
+ #else
+ if(iofd->fd > fds_size)
+ fds_size = iofd->fd;
+ FD_SET(iofd->fd, &read_fds);
+ #endif
+ }
+ else if(iofd->type == IOTYPE_SERVER || iofd->type == IOTYPE_CLIENT) {
+ if(iofd->fd > fds_size)
+ fds_size = iofd->fd;
+ FD_SET(iofd->fd, &read_fds);
+ if(iohandler_wants_writes(iofd))
+ FD_SET(iofd->fd, &write_fds);
+ }
+ }
+
+ while(timer_priority) {
+ tdiff.tv_sec = timer_priority->timeout.tv_sec - now.tv_sec;
+ tdiff.tv_usec = timer_priority->timeout.tv_usec - now.tv_usec;
+ if(tdiff.tv_sec < 0 || (tdiff.tv_sec == 0 && tdiff.tv_usec <= 0)) {
+ iohandler_events(timer_priority, 0, 0);
+ iohandler_close(timer_priority); //also sets timer_priority to the next timed element
+ continue;
+ } else if(tdiff.tv_usec < 0) {
+ tdiff.tv_sec--;
+ tdiff.tv_usec += 1000000; //1 sec
+ }
+ if(timeval_is_smaler((&tdiff), timeout)) {
+ timeout->tv_sec = tdiff.tv_sec;
+ timeout->tv_usec = tdiff.tv_usec;
+ }
+ break;
+ }
+
+ //select system call
+ select_result = select(fds_size + 1, &read_fds, &write_fds, NULL, timeout);
+
+ if (select_result < 0) {
+ if (errno != EINTR) {
+ iohandler_log(IOLOG_FATAL, "select() failed with errno %d %d: %s", select_result, errno, strerror(errno));
+ return;
+ }
+ }
+
+ gettimeofday(&now, NULL);
+
+ //check all descriptors
+ for(iofd = first_descriptor; iofd; iofd = tmp_iofd) {
+ tmp_iofd = iofd->next;
+ if(iofd->type == IOTYPE_SERVER || iofd->type == IOTYPE_CLIENT || iofd->type == IOTYPE_STDIN) {
+ if(FD_ISSET(iofd->fd, &read_fds) || FD_ISSET(iofd->fd, &write_fds)) {
+ iohandler_events(iofd, FD_ISSET(iofd->fd, &read_fds), FD_ISSET(iofd->fd, &write_fds));
+ continue;
+ }
+ }
+ }
+
+ //check timers
+ while(timer_priority) {
+ tdiff.tv_sec = timer_priority->timeout.tv_sec - now.tv_sec;
+ tdiff.tv_usec = timer_priority->timeout.tv_usec - now.tv_usec;
+ if(tdiff.tv_sec < 0 || (tdiff.tv_sec == 0 && tdiff.tv_usec <= 0)) {
+ iohandler_events(timer_priority, 0, 0);
+ iohandler_close(timer_priority); //also sets timer_priority to the next timed element
+ continue;
+ }
+ break;
+ }
+
+}
+
+static void engine_select_cleanup() {
+ /* empty */
+}
+
+struct IOEngine engine_select = {
+ .name = "select",
+ .init = engine_select_init,
+ .add = engine_select_add,
+ .remove = engine_select_remove,
+ .update = engine_select_update,
+ .loop = engine_select_loop,
+ .cleanup = engine_select_cleanup,
+};
--- /dev/null
+/* IOHandler.c - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "IOHandler.h"
+#include "IOEngine.h"
+#include "IOHandler_SSL.h"
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#ifdef WIN32
+#define _WIN32_WINNT 0x501
+#include <windows.h>
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#endif
+
+#define MAXLOG 1024
+iohandler_log_callback *iolog_backend = NULL;
+
+struct IODescriptor *first_descriptor = NULL;
+struct IODescriptor *timer_priority = NULL;
+
+void iohandler_log(enum IOLogType type, char *text, ...) {
+ va_list arg_list;
+ char logBuf[MAXLOG+1];
+ int pos;
+ logBuf[0] = '\0';
+ va_start(arg_list, text);
+ pos = vsnprintf(logBuf, MAXLOG - 1, text, arg_list);
+ va_end(arg_list);
+ if (pos < 0 || pos > (MAXLOG - 1)) pos = MAXLOG - 1;
+ logBuf[pos] = '\n';
+ logBuf[pos+1] = '\0';
+
+ if(iolog_backend)
+ iolog_backend(type, logBuf);
+}
+
+/* IO Engines */
+extern struct IOEngine engine_select; /* select system call (should always be useable) */
+extern struct IOEngine engine_kevent;
+extern struct IOEngine engine_epoll;
+
+struct IOEngine *engine = NULL;
+
+static void iohandler_init_engine() {
+ if(engine) return;
+ //try other engines
+ if(!engine && engine_kevent.init && engine_kevent.init())
+ engine = &engine_kevent;
+ if(!engine && engine_epoll.init && engine_epoll.init())
+ engine = &engine_epoll;
+
+ if (!engine) {
+ if(engine_select.init())
+ engine = &engine_select;
+ else {
+ iohandler_log(IOLOG_FATAL, "found no useable IO engine");
+ return;
+ }
+ }
+ iohandler_log(IOLOG_DEBUG, "using %s IO engine", engine->name);
+ iohandler_ssl_init();
+ #ifdef WIN32
+ WSADATA wsadata;
+ // Start Windows Sockets.
+ if (WSAStartup(MAKEWORD(2, 0), &wsadata)) {
+ iohandler_log(IOLOG_FATAL, "Unable to start Windows Sockets");
+ return;
+ }
+ #endif
+}
+
+static void iohandler_append(struct IODescriptor *descriptor) {
+ struct timeval *timeout = ((descriptor->timeout.tv_sec || descriptor->timeout.tv_usec) ? &descriptor->timeout : NULL);
+ if(timeout) {
+ struct IODescriptor *iofd;
+ int set_priority = 1;
+ descriptor->timeout = *timeout;
+ if(timer_priority)
+ iofd = timer_priority;
+ else
+ iofd = first_descriptor;
+ if(iofd) {
+ for(;;iofd = iofd->next) {
+ if(timeval_is_smaler(timeout, (&iofd->timeout))) {
+ descriptor->prev = iofd->prev;
+ descriptor->next = iofd;
+ iofd->prev = descriptor;
+ if(iofd->prev)
+ iofd->prev->next = descriptor;
+ if(set_priority)
+ timer_priority = descriptor;
+ break;
+ }
+ if(iofd == timer_priority)
+ set_priority = 0;
+ if(iofd->next == NULL) {
+ descriptor->next = NULL;
+ descriptor->prev = iofd;
+ iofd->next = descriptor;
+ if(set_priority)
+ timer_priority = descriptor;
+ break;
+ }
+ }
+ } else {
+ descriptor->prev = NULL;
+ descriptor->next = NULL;
+ first_descriptor = descriptor;
+ timer_priority = descriptor;
+ }
+
+ } else {
+ descriptor->prev = NULL;
+ descriptor->next = first_descriptor;
+ if(first_descriptor)
+ first_descriptor->prev = descriptor;
+ first_descriptor = descriptor;
+ }
+}
+
+static void iohandler_remove(struct IODescriptor *descriptor, int engine_remove) {
+ //remove IODescriptor from the list
+ if(descriptor->prev)
+ descriptor->prev->next = descriptor->next;
+ else
+ first_descriptor = descriptor->next;
+ if(descriptor->next)
+ descriptor->next->prev = descriptor->prev;
+ if(descriptor == timer_priority)
+ timer_priority = descriptor->next;
+
+ if(engine_remove)
+ engine->remove(descriptor);
+ if(descriptor->readbuf.buffer)
+ free(descriptor->readbuf.buffer);
+ if(descriptor->writebuf.buffer)
+ free(descriptor->writebuf.buffer);
+ iohandler_log(IOLOG_DEBUG, "removed IODescriptor (%d) of type `%s`", descriptor->fd, iohandler_iotype_name(descriptor->type));
+ free(descriptor);
+}
+
+struct IODescriptor *iohandler_add(int sockfd, enum IOType type, struct timeval *timeout, iohandler_callback *callback) {
+ //just add a new IODescriptor
+ struct IODescriptor *descriptor = calloc(1, sizeof(*descriptor));
+ if(!descriptor) {
+ iohandler_log(IOLOG_ERROR, "could not allocate memory for IODescriptor in %s:%d", __FILE__, __LINE__);
+ return NULL;
+ }
+ descriptor->fd = (type == IOTYPE_STDIN ? fileno(stdin) : sockfd);
+ descriptor->type = type;
+ descriptor->state = (type == IOTYPE_STDIN ? IO_CONNECTED : IO_CLOSED);
+ descriptor->callback = callback;
+ if(timeout)
+ descriptor->timeout = *timeout;
+ if(type != IOTYPE_TIMER) {
+ descriptor->readbuf.buffer = malloc(IO_READ_BUFLEN + 2);
+ descriptor->readbuf.bufpos = 0;
+ descriptor->readbuf.buflen = IO_READ_BUFLEN;
+ descriptor->writebuf.buffer = malloc(IO_READ_BUFLEN + 2);
+ descriptor->writebuf.bufpos = 0;
+ descriptor->writebuf.buflen = IO_READ_BUFLEN;
+ }
+
+ if(!engine) {
+ iohandler_init_engine();
+ if(!engine) {
+ return NULL;
+ }
+ }
+ engine->add(descriptor);
+
+ //add IODescriptor to the list
+ iohandler_append(descriptor);
+
+ iohandler_log(IOLOG_DEBUG, "added custom socket descriptor (%d) as type `%s`", sockfd, iohandler_iotype_name(type));
+ return descriptor;
+}
+
+void iohandler_set_timeout(struct IODescriptor *descriptor, struct timeval *timeout) {
+ if(descriptor->prev)
+ descriptor->prev->next = descriptor->next;
+ else
+ first_descriptor = descriptor->next;
+ if(descriptor->next)
+ descriptor->next->prev = descriptor->prev;
+ if(descriptor == timer_priority)
+ timer_priority = descriptor->next;
+ if(timeout)
+ descriptor->timeout = *timeout;
+ else {
+ descriptor->timeout.tv_sec = 0;
+ descriptor->timeout.tv_usec = 0;
+ }
+ iohandler_append(descriptor);
+}
+
+static void iohandler_increase_iobuf(struct IOBuffer *iobuf, size_t required) {
+ if(iobuf->buflen >= required) return;
+ char *new_buf = realloc(iobuf->buffer, required + 2);
+ if(new_buf) {
+ iobuf->buffer = new_buf;
+ iobuf->buflen = required;
+ }
+}
+
+struct IODescriptor *iohandler_timer(struct timeval timeout, iohandler_callback *callback) {
+ struct IODescriptor *descriptor;
+ descriptor = iohandler_add(-1, IOTYPE_TIMER, &timeout, callback);
+ if(!descriptor) {
+ iohandler_log(IOLOG_ERROR, "could not allocate memory for IODescriptor in %s:%d", __FILE__, __LINE__);
+ return NULL;
+ }
+ iohandler_log(IOLOG_DEBUG, "added timer descriptor (sec: %d; usec: %d)", timeout.tv_sec, timeout.tv_usec);
+ return descriptor;
+}
+
+struct IODescriptor *iohandler_connect(const char *hostname, unsigned int port, int ssl, const char *bindhost, iohandler_callback *callback) {
+ //non-blocking connect
+ int sockfd, result;
+ struct addrinfo hints, *res;
+ struct sockaddr_in *ip4 = NULL;
+ struct sockaddr_in6 *ip6 = NULL;
+ size_t dstaddrlen;
+ struct sockaddr *dstaddr = NULL;
+ struct IODescriptor *descriptor;
+
+ if(!engine) {
+ iohandler_init_engine();
+ if(!engine) return NULL;
+ }
+ memset (&hints, 0, sizeof (hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags |= AI_CANONNAME;
+ if ((result = getaddrinfo (hostname, NULL, &hints, &res))) {
+ iohandler_log(IOLOG_ERROR, "could not resolve %s to an IP address (%d)", hostname, result);
+ return NULL;
+ }
+ while (res) {
+ switch (res->ai_family) {
+ case AF_INET:
+ ip4 = (struct sockaddr_in *) res->ai_addr;
+ break;
+ case AF_INET6:
+ ip6 = (struct sockaddr_in6 *) res->ai_addr;
+ break;
+ }
+ res = res->ai_next;
+ freeaddrinfo(res);
+ }
+
+ if(ip6) {
+ sockfd = socket(AF_INET6, SOCK_STREAM, 0);
+ if(sockfd == -1) {
+ iohandler_log(IOLOG_ERROR, "could not create socket in %s:%d", __FILE__, __LINE__);
+ return NULL;
+ }
+
+ ip6->sin6_family = AF_INET6;
+ ip6->sin6_port = htons(port);
+
+ struct sockaddr_in6 *ip6vhost = NULL;
+ if (bindhost && !getaddrinfo(bindhost, NULL, &hints, &res)) {
+ while (res) {
+ switch (res->ai_family) {
+ case AF_INET6:
+ ip6vhost = (struct sockaddr_in6 *) res->ai_addr;
+ break;
+ }
+ res = res->ai_next;
+ freeaddrinfo(res);
+ }
+ }
+ if(ip6vhost) {
+ ip6vhost->sin6_family = AF_INET6;
+ ip6vhost->sin6_port = htons(0);
+ bind(sockfd, (struct sockaddr*)ip6vhost, sizeof(*ip6vhost));
+ }
+ dstaddr = (struct sockaddr*)ip6;
+ dstaddrlen = sizeof(*ip6);
+ } else if(ip4) {
+ sockfd = socket(AF_INET, SOCK_STREAM, 0);
+ if(sockfd == -1) {
+ iohandler_log(IOLOG_ERROR, "could not create socket in %s:%d", __FILE__, __LINE__);
+ return NULL;
+ }
+
+ ip4->sin_family = AF_INET;
+ ip4->sin_port = htons(port);
+
+ struct sockaddr_in *ip4vhost = NULL;
+ if (bindhost && !getaddrinfo(bindhost, NULL, &hints, &res)) {
+ while (res) {
+ switch (res->ai_family) {
+ case AF_INET:
+ ip4vhost = (struct sockaddr_in *) res->ai_addr;
+ break;
+ }
+ res = res->ai_next;
+ freeaddrinfo(res);
+ }
+ }
+ if(ip4vhost) {
+ ip4vhost->sin_family = AF_INET;
+ ip4vhost->sin_port = htons(0);
+ bind(sockfd, (struct sockaddr*)ip4vhost, sizeof(*ip4vhost));
+ }
+ dstaddr = (struct sockaddr*)ip4;
+ dstaddrlen = sizeof(*ip4);
+ } else
+ return NULL;
+ //make sockfd unblocking
+#if defined(F_GETFL)
+ {
+ int flags;
+ flags = fcntl(sockfd, F_GETFL);
+ fcntl(sockfd, F_SETFL, flags|O_NONBLOCK);
+ flags = fcntl(sockfd, F_GETFD);
+ fcntl(sockfd, F_SETFD, flags|FD_CLOEXEC);
+ }
+#else
+ /* I hope you're using the Win32 backend or something else that
+ * automatically marks the file descriptor non-blocking...
+ */
+#endif
+ descriptor = iohandler_add(sockfd, IOTYPE_CLIENT, NULL, callback);
+ if(!descriptor) {
+ close(sockfd);
+ return NULL;
+ }
+ connect(sockfd, dstaddr, dstaddrlen); //returns EINPROGRESS here (nonblocking)
+ descriptor->state = IO_CONNECTING;
+ descriptor->ssl = (ssl ? 1 : 0);
+ descriptor->read_lines = 1;
+ engine->update(descriptor);
+ iohandler_log(IOLOG_DEBUG, "added client socket (%d) connecting to %s:%d", sockfd, hostname, port);
+ return descriptor;
+}
+
+struct IODescriptor *iohandler_listen(const char *hostname, unsigned int port, iohandler_callback *callback) {
+ int sockfd;
+ struct addrinfo hints, *res;
+ struct sockaddr_in *ip4 = NULL;
+ struct sockaddr_in6 *ip6 = NULL;
+ struct IODescriptor *descriptor;
+ unsigned int opt;
+
+ if(!engine) {
+ iohandler_init_engine();
+ if(!engine) return NULL;
+ }
+ memset (&hints, 0, sizeof (hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags |= AI_CANONNAME;
+ if (getaddrinfo (hostname, NULL, &hints, &res)) {
+ return NULL;
+ }
+ while (res) {
+ switch (res->ai_family) {
+ case AF_INET:
+ ip4 = (struct sockaddr_in *) res->ai_addr;
+ break;
+ case AF_INET6:
+ ip6 = (struct sockaddr_in6 *) res->ai_addr;
+ break;
+ }
+ res = res->ai_next;
+ freeaddrinfo(res);
+ }
+
+ if(ip6) {
+ sockfd = socket(AF_INET6, SOCK_STREAM, 0);
+ if(sockfd == -1) return NULL;
+
+ opt = 1;
+ setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char*)&opt, sizeof(opt));
+
+ ip6->sin6_family = AF_INET6;
+ ip6->sin6_port = htons(port);
+
+ bind(sockfd, (struct sockaddr*)ip6, sizeof(*ip6));
+ } else if(ip4) {
+ sockfd = socket(AF_INET, SOCK_STREAM, 0);
+ if(sockfd == -1) return NULL;
+
+ opt = 1;
+ setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char*)&opt, sizeof(opt));
+
+ ip4->sin_family = AF_INET;
+ ip4->sin_port = htons(port);
+
+ bind(sockfd, (struct sockaddr*)ip4, sizeof(*ip4));
+ } else
+ return NULL;
+ //make sockfd unblocking
+#if defined(F_GETFL)
+ {
+ int flags;
+ flags = fcntl(sockfd, F_GETFL);
+ fcntl(sockfd, F_SETFL, flags|O_NONBLOCK);
+ flags = fcntl(sockfd, F_GETFD);
+ fcntl(sockfd, F_SETFD, flags|FD_CLOEXEC);
+ }
+#else
+ /* I hope you're using the Win32 backend or something else that
+ * automatically marks the file descriptor non-blocking...
+ */
+#endif
+ descriptor = iohandler_add(sockfd, IOTYPE_SERVER, NULL, callback);
+ if(!descriptor) {
+ close(sockfd);
+ return NULL;
+ }
+ listen(sockfd, 1);
+ descriptor->state = IO_LISTENING;
+ engine->update(descriptor);
+ iohandler_log(IOLOG_DEBUG, "added server socket (%d) listening on %s:%d", sockfd, hostname, port);
+ return descriptor;
+}
+
+void iohandler_write(struct IODescriptor *iofd, const char *line) {
+ size_t linelen = strlen(line);
+ iohandler_send(iofd, line, linelen);
+}
+
+void iohandler_send(struct IODescriptor *iofd, const char *data, size_t datalen) {
+ if(iofd->type == IOTYPE_TIMER || iofd->state == IO_CLOSED) {
+ iohandler_log(IOLOG_ERROR, "could not write to socket (%s)", (iofd->type == IOTYPE_TIMER ? "IOTYPE_TIMER" : "IO_CLOSED"));
+ return;
+ }
+ iohandler_log(IOLOG_DEBUG, "add %d to writebuf (fd: %d): %s", datalen, iofd->fd, data);
+ if(iofd->writebuf.buflen < iofd->writebuf.bufpos + datalen) {
+ iohandler_log(IOLOG_DEBUG, "increase writebuf (curr: %d) to %d (+%d bytes)", iofd->writebuf.buflen, iofd->writebuf.bufpos + datalen, (iofd->writebuf.bufpos + datalen - iofd->writebuf.buflen));
+ iohandler_increase_iobuf(&iofd->writebuf, iofd->writebuf.bufpos + datalen);
+ if(iofd->writebuf.buflen < iofd->writebuf.bufpos + datalen) {
+ iohandler_log(IOLOG_ERROR, "increase writebuf (curr: %d) to %d (+%d bytes) FAILED", iofd->writebuf.buflen, iofd->writebuf.bufpos + datalen, (iofd->writebuf.bufpos + datalen - iofd->writebuf.buflen));
+ return;
+ }
+ }
+ memcpy(iofd->writebuf.buffer + iofd->writebuf.bufpos, data, datalen);
+ iofd->writebuf.bufpos += datalen;
+ engine->update(iofd);
+}
+
+void iohandler_printf(struct IODescriptor *iofd, const char *text, ...) {
+ va_list arg_list;
+ char sendBuf[IO_LINE_LEN];
+ int pos;
+ sendBuf[0] = '\0';
+ va_start(arg_list, text);
+ pos = vsnprintf(sendBuf, IO_LINE_LEN - 2, text, arg_list);
+ va_end(arg_list);
+ if (pos < 0 || pos > (IO_LINE_LEN - 2)) pos = IO_LINE_LEN - 2;
+ sendBuf[pos] = '\n';
+ sendBuf[pos+1] = '\0';
+ iohandler_send(iofd, sendBuf, pos+1);
+}
+
+void iohandler_try_write(struct IODescriptor *iofd) {
+ if(!iofd->writebuf.bufpos) return;
+ iohandler_log(IOLOG_DEBUG, "write writebuf (%d bytes) to socket (fd: %d)", iofd->writebuf.bufpos, iofd->fd);
+ int res;
+ if(iofd->ssl_active)
+ res = iohandler_ssl_write(iofd, iofd->writebuf.buffer, iofd->writebuf.bufpos);
+ else
+ res = send(iofd->fd, iofd->writebuf.buffer, iofd->writebuf.bufpos, 0);
+ if(res < 0) {
+ if (errno != EAGAIN) {
+ iohandler_log(IOLOG_ERROR, "could not write to socket (fd: %d): %d - %s", iofd->fd, errno, strerror(errno));
+ }
+ } else {
+ iofd->writebuf.bufpos -= res;
+ if(iofd->state != IO_CLOSED)
+ engine->update(iofd);
+ }
+}
+
+void iohandler_close(struct IODescriptor *iofd) {
+ int engine_remove = 1;
+ iofd->state = IO_CLOSED;
+ if(iofd->writebuf.bufpos) {
+ //try to send everything before closing
+#if defined(F_GETFL)
+ {
+ int flags;
+ flags = fcntl(iofd->fd, F_GETFL);
+ fcntl(iofd->fd, F_SETFL, flags & ~O_NONBLOCK);
+ flags = fcntl(iofd->fd, F_GETFD);
+ fcntl(iofd->fd, F_SETFD, flags|FD_CLOEXEC);
+ }
+#else
+ engine_remove = 0;
+ engine->remove(iofd);
+#endif
+ iohandler_try_write(iofd);
+ }
+ //close IODescriptor
+ if(iofd->ssl)
+ iohandler_ssl_disconnect(iofd);
+ if(iofd->type == IOTYPE_SERVER || iofd->type == IOTYPE_CLIENT || iofd->type == IOTYPE_STDIN)
+ close(iofd->fd);
+ iohandler_remove(iofd, engine_remove);
+}
+
+void iohandler_update(struct IODescriptor *iofd) {
+ iohandler_log(IOLOG_DEBUG, "external call to iohandler_update (fd: %d)", iofd->fd);
+ engine->update(iofd);
+}
+
+static void iohandler_trigger_event(struct IOEvent *event) {
+ if(!event->iofd->callback) return;
+ iohandler_log(IOLOG_DEBUG, "triggering event (%s) for %s (fd: %d)", iohandler_ioeventtype_name(event->type), iohandler_iotype_name(event->iofd->type), event->iofd->fd);
+ event->iofd->callback(event);
+}
+
+void iohandler_events(struct IODescriptor *iofd, int readable, int writeable) {
+ struct IOEvent callback_event;
+ callback_event.type = IOEVENT_IGNORE;
+ callback_event.iofd = iofd;
+ switch(iofd->state) {
+ case IO_SSLWAIT:
+ if(!readable && !writeable) {
+ callback_event.type = IOEVENT_SSLFAILED;
+ iofd->state = IO_CLOSED;
+ } else {
+ iohandler_log(IOLOG_DEBUG, "triggering iohandler_ssl_client_handshake for %s (fd: %d)", iohandler_iotype_name(iofd->type), iofd->fd);
+ iohandler_ssl_client_handshake(iofd);
+ }
+ break;
+ case IO_CLOSED:
+ if(iofd->type == IOTYPE_TIMER)
+ callback_event.type = IOEVENT_TIMEOUT;
+ break;
+ case IO_LISTENING:
+ if(readable) {
+ callback_event.data.accept_fd = accept(iofd->fd, NULL, 0);
+ if(callback_event.data.accept_fd < 0) {
+ iohandler_log(IOLOG_ERROR, "could not accept client (server fd: %d): %d - %s", iofd->fd, errno, strerror(errno));
+ } else
+ callback_event.type = IOEVENT_ACCEPT;
+ }
+ break;
+ case IO_CONNECTING:
+ if(readable) { //could not connect
+ callback_event.type = IOEVENT_NOTCONNECTED;
+ //socklen_t arglen;
+ //arglen = sizeof(callback_event.data.errid);
+ //if (getsockopt(iofd->fd, SOL_SOCKET, SO_ERROR, &callback_event.data.errid, &arglen) < 0)
+ // callback_event.data.errid = errno;
+ iofd->state = IO_CLOSED;
+ engine->update(iofd);
+ } else if(writeable) {
+ if(iofd->ssl && !iofd->ssl_active) {
+ iohandler_log(IOLOG_DEBUG, "triggering iohandler_ssl_connect for %s (fd: %d)", iohandler_iotype_name(iofd->type), iofd->fd);
+ iohandler_ssl_connect(iofd);
+ return;
+ }
+ callback_event.type = IOEVENT_CONNECTED;
+ iofd->state = IO_CONNECTED;
+ engine->update(iofd);
+ }
+ break;
+ case IO_CONNECTED:
+ if(readable) {
+ if(iofd->read_lines) {
+ int bytes;
+
+ if(iofd->ssl_active)
+ bytes = iohandler_ssl_read(iofd, iofd->readbuf.buffer + iofd->readbuf.bufpos, iofd->readbuf.buflen - iofd->readbuf.bufpos);
+ else {
+ if(iofd->type == IOTYPE_STDIN)
+ #ifdef WIN32
+ bytes = readable;
+ #else
+ bytes = read(iofd->fd, iofd->readbuf.buffer + iofd->readbuf.bufpos, iofd->readbuf.buflen - iofd->readbuf.bufpos);
+ #endif
+ else
+ bytes = recv(iofd->fd, iofd->readbuf.buffer + iofd->readbuf.bufpos, iofd->readbuf.buflen - iofd->readbuf.bufpos, 0);
+ }
+ if(bytes <= 0) {
+ if (errno != EAGAIN) {
+ iofd->state = IO_CLOSED;
+ engine->update(iofd);
+ callback_event.type = IOEVENT_CLOSED;
+ callback_event.data.errid = errno;
+ }
+ } else {
+ int i, used_bytes = 0;
+ iohandler_log(IOLOG_DEBUG, "received %d bytes (fd: %d). readbuf position: %d", bytes, iofd->fd, iofd->readbuf.bufpos);
+ iofd->readbuf.bufpos += bytes;
+ callback_event.type = IOEVENT_RECV;
+ for(i = 0; i < iofd->readbuf.bufpos; i++) {
+ if(iofd->readbuf.buffer[i] == '\r' && iofd->readbuf.buffer[i+1] == '\n')
+ iofd->readbuf.buffer[i] = 0;
+ else if(iofd->readbuf.buffer[i] == '\n' || iofd->readbuf.buffer[i] == '\r') {
+ iofd->readbuf.buffer[i] = 0;
+ callback_event.data.recv_str = iofd->readbuf.buffer + used_bytes;
+ iohandler_log(IOLOG_DEBUG, "parsed line (%d bytes): %s", i - used_bytes, iofd->readbuf.buffer + used_bytes);
+ used_bytes = i+1;
+ iohandler_trigger_event(&callback_event);
+ } else if(i + 1 - used_bytes >= IO_LINE_LEN) { //512 max
+ iofd->readbuf.buffer[i] = 0;
+ callback_event.data.recv_str = iofd->readbuf.buffer + used_bytes;
+ iohandler_log(IOLOG_DEBUG, "parsed and stripped line (%d bytes): %s", i - used_bytes, iofd->readbuf.buffer + used_bytes);
+ for(; i < iofd->readbuf.bufpos; i++) { //skip the rest of the line
+ if(iofd->readbuf.buffer[i] == '\n' || (iofd->readbuf.buffer[i] == '\r' && iofd->readbuf.buffer[i+1] != '\n')) {
+ break;
+ }
+ }
+ used_bytes = i+1;
+ iohandler_trigger_event(&callback_event);
+ }
+ }
+ if(used_bytes) {
+ if(used_bytes == iofd->readbuf.bufpos) {
+ iofd->readbuf.bufpos = 0;
+ iohandler_log(IOLOG_DEBUG, "readbuf fully processed (set buffer position to 0)");
+ } else {
+ iohandler_log(IOLOG_DEBUG, "readbuf rest: %d bytes (used %d bytes)", iofd->readbuf.bufpos - used_bytes, used_bytes);
+ memmove(iofd->readbuf.buffer, iofd->readbuf.buffer + used_bytes, iofd->readbuf.bufpos - used_bytes);
+ iofd->readbuf.bufpos -= used_bytes;
+ }
+ }
+ callback_event.type = IOEVENT_IGNORE;
+ }
+ } else
+ callback_event.type = IOEVENT_READABLE;
+ }
+ if(writeable) {
+ iohandler_try_write(iofd);
+ }
+ break;
+ }
+ if(callback_event.type == IOEVENT_IGNORE && !readable && !writeable)
+ callback_event.type = IOEVENT_TIMEOUT;
+ if(callback_event.type != IOEVENT_IGNORE)
+ iohandler_trigger_event(&callback_event);
+}
+
+void iohandler_poll() {
+ if(engine) {
+ struct timeval timeout;
+ timeout.tv_sec = IO_MAX_TIMEOUT;
+ timeout.tv_usec = 0;
+ engine->loop(&timeout);
+ }
+}
+
+//debugging functions
+char *iohandler_iotype_name(enum IOType type) {
+ switch(type) {
+ case IOTYPE_UNKNOWN:
+ return "IOTYPE_UNKNOWN";
+ case IOTYPE_SERVER:
+ return "IOTYPE_SERVER";
+ case IOTYPE_CLIENT:
+ return "IOTYPE_CLIENT";
+ case IOTYPE_STDIN:
+ return "IOTYPE_STDIN";
+ case IOTYPE_TIMER:
+ return "IOTYPE_TIMER";
+ default:
+ return "(UNDEFINED)";
+ }
+}
+
+char *iohandler_iostatus_name(enum IOStatus status) {
+ switch(status) {
+ case IO_CLOSED:
+ return "IO_CLOSED";
+ case IO_LISTENING:
+ return "IO_LISTENING";
+ case IO_CONNECTING:
+ return "IO_CONNECTING";
+ case IO_CONNECTED:
+ return "IO_CONNECTED";
+ case IO_SSLWAIT:
+ return "IO_SSLWAIT";
+ default:
+ return "(UNDEFINED)";
+ }
+}
+
+char *iohandler_ioeventtype_name(enum IOEventType type) {
+ switch(type) {
+ case IOEVENT_IGNORE:
+ return "IOEVENT_IGNORE";
+ case IOEVENT_READABLE:
+ return "IOEVENT_READABLE";
+ case IOEVENT_RECV:
+ return "IOEVENT_RECV";
+ case IOEVENT_CONNECTED:
+ return "IOEVENT_CONNECTED";
+ case IOEVENT_NOTCONNECTED:
+ return "IOEVENT_NOTCONNECTED";
+ case IOEVENT_CLOSED:
+ return "IOEVENT_CLOSED";
+ case IOEVENT_ACCEPT:
+ return "IOEVENT_ACCEPT";
+ case IOEVENT_TIMEOUT:
+ return "IOEVENT_TIMEOUT";
+ default:
+ return "(UNDEFINED)";
+ }
+}
--- /dev/null
+/* IOHandler.h - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _IOHandler_h
+#define _IOHandler_h
+#include <stddef.h>
+#include <sys/time.h> /* struct timeval */
+
+#define IO_READ_BUFLEN 1024
+#define IO_MAX_TIMEOUT 10
+#define IO_LINE_LEN 1024
+
+struct timeval;
+struct IODescriptor;
+struct IOEvent;
+struct IOSSLNode;
+
+enum IOLogType {
+ IOLOG_DEBUG,
+ IOLOG_WARNING,
+ IOLOG_ERROR,
+ IOLOG_FATAL
+};
+
+#define IOHANDLER_CALLBACK(NAME) void NAME(struct IOEvent *event)
+typedef IOHANDLER_CALLBACK(iohandler_callback);
+
+#define IOHANDLER_LOG_BACKEND(NAME) void NAME(enum IOLogType type, const char *line)
+typedef IOHANDLER_LOG_BACKEND(iohandler_log_callback);
+
+extern iohandler_log_callback *iolog_backend;
+
+enum IOType {
+ IOTYPE_UNKNOWN, /* ignore descriptor (uninitialized) */
+ IOTYPE_SERVER, /* server socket */
+ IOTYPE_CLIENT, /* client socket */
+ IOTYPE_STDIN, /* stdin */
+ IOTYPE_TIMER /* timer */
+};
+
+enum IOStatus {
+ IO_CLOSED, /* descriptor is dead (socket waiting for removal or timer) */
+ IO_LISTENING, /* descriptor is waiting for connections (server socket) */
+ IO_CONNECTING, /* descriptor is waiting for connection approval (connecting client socket) */
+ IO_CONNECTED, /* descriptor is connected (connected client socket) */
+ IO_SSLWAIT /* waiting for SSL backend (e.g. handshake) */
+};
+
+enum IOEventType {
+ IOEVENT_IGNORE,
+ IOEVENT_READABLE, /* socket is readable - not read anything yet, could also be disconnect notification */
+ IOEVENT_RECV, /* client socket received something (recv_str valid) */
+ IOEVENT_CONNECTED, /* client socket connected successful */
+ IOEVENT_NOTCONNECTED, /* client socket could not connect (errid valid) */
+ IOEVENT_CLOSED, /* client socket lost connection (errid valid) */
+ IOEVENT_ACCEPT, /* server socket accepted new connection (accept_fd valid) */
+ IOEVENT_TIMEOUT, /* timer timed out */
+ IOEVENT_SSLFAILED /* failed to initialize SSL session */
+};
+
+struct IOBuffer {
+ char *buffer;
+ size_t bufpos, buflen;
+};
+
+struct IODescriptor {
+ int fd;
+ enum IOType type;
+ enum IOStatus state;
+ struct timeval timeout;
+ iohandler_callback *callback;
+ struct IOBuffer readbuf;
+ struct IOBuffer writebuf;
+ void *data;
+ int read_lines : 1;
+ int ssl : 1;
+ int ssl_active : 1;
+ int ssl_hs_read : 1;
+ int ssl_hs_write : 1;
+ struct IOSSLNode *sslnode;
+
+ struct IODescriptor *next, *prev;
+};
+
+struct IOEvent {
+ enum IOEventType type;
+ struct IODescriptor *iofd;
+ union {
+ char *recv_str;
+ int accept_fd;
+ int errid;
+ } data;
+};
+
+struct IODescriptor *iohandler_add(int sockfd, enum IOType type, struct timeval *timeout, iohandler_callback *callback);
+struct IODescriptor *iohandler_timer(struct timeval timeout, iohandler_callback *callback);
+struct IODescriptor *iohandler_connect(const char *hostname, unsigned int port, int ssl, const char *bind, iohandler_callback *callback);
+struct IODescriptor *iohandler_listen(const char *hostname, unsigned int port, iohandler_callback *callback);
+void iohandler_write(struct IODescriptor *iofd, const char *line);
+void iohandler_send(struct IODescriptor *iofd, const char *data, size_t datalen);
+void iohandler_printf(struct IODescriptor *iofd, const char *text, ...);
+void iohandler_close(struct IODescriptor *iofd);
+void iohandler_update(struct IODescriptor *iofd);
+void iohandler_set_timeout(struct IODescriptor *iofd, struct timeval *timeout);
+
+void iohandler_poll();
+
+#endif
--- /dev/null
+/* IOHandler_SSL.c - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "IOEngine.h"
+#include "IOHandler_SSL.h"
+
+void iohandler_ssl_init() {
+#ifdef HAVE_SSL
+ SSL_library_init();
+ SSL_load_error_strings();
+#endif
+}
+
+void iohandler_ssl_connect(struct IODescriptor *iofd) {
+#ifdef HAVE_SSL
+ iofd->state = IO_SSLWAIT;
+ struct IOSSLNode *sslnode = malloc(sizeof(*sslnode));
+ sslnode->sslContext = SSL_CTX_new(SSLv23_client_method());
+ if(!sslnode->sslContext)
+ goto ssl_connect_err;
+ sslnode->sslHandle = SSL_new(sslnode->sslContext);
+ if(!sslnode->sslHandle)
+ goto ssl_connect_err;
+ if(!SSL_set_fd(sslnode->sslHandle, iofd->fd))
+ goto ssl_connect_err;
+ SSL_set_connect_state(sslnode->sslHandle);
+ iofd->sslnode = sslnode;
+ iohandler_ssl_client_handshake(iofd);
+ return;
+ssl_connect_err:
+ free(sslnode);
+ iohandler_events(iofd, 0, 0);
+#endif
+}
+
+void iohandler_ssl_client_handshake(struct IODescriptor *iofd) {
+#ifdef HAVE_SSL
+ // Perform an SSL handshake.
+ int ret = SSL_do_handshake(iofd->sslnode->sslHandle);
+ iofd->ssl_hs_read = 0;
+ iofd->ssl_hs_write = 0;
+ switch(SSL_get_error(iofd->sslnode->sslHandle, ret)) {
+ case SSL_ERROR_NONE:
+ iofd->state = IO_CONNECTING;
+ iofd->ssl_active = 1;
+ iohandler_log(IOLOG_DEBUG, "SSL handshake for %s (fd: %d) successful", iohandler_iotype_name(iofd->type), iofd->fd);
+ iohandler_events(iofd, 0, 1); //perform IOEVENT_CONNECTED event
+ break;
+ case SSL_ERROR_WANT_READ:
+ iofd->ssl_hs_read = 1;
+ iohandler_log(IOLOG_DEBUG, "SSL_do_handshake for %s (fd: %d) returned SSL_ERROR_WANT_READ", iohandler_iotype_name(iofd->type), iofd->fd);
+ break;
+ case SSL_ERROR_WANT_WRITE:
+ iofd->ssl_hs_write = 1;
+ iohandler_log(IOLOG_DEBUG, "SSL_do_handshake for %s (fd: %d) returned SSL_ERROR_WANT_WRITE", iohandler_iotype_name(iofd->type), iofd->fd);
+ break;
+ default:
+ iohandler_log(IOLOG_ERROR, "SSL_do_handshake for %s (fd: %d) failed with ", iohandler_iotype_name(iofd->type), iofd->fd);
+ iohandler_events(iofd, 0, 0);
+ break;
+ }
+#endif
+}
+
+void iohandler_ssl_disconnect(struct IODescriptor *iofd) {
+#ifdef HAVE_SSL
+ if(!iofd->sslnode) return;
+ SSL_shutdown(iofd->sslnode->sslHandle);
+ SSL_free(iofd->sslnode->sslHandle);
+ SSL_CTX_free(iofd->sslnode->sslContext);
+ free(iofd->sslnode);
+ iofd->sslnode = NULL;
+ iofd->ssl_active = 0;
+#endif
+}
+
+int iohandler_ssl_read(struct IODescriptor *iofd, char *buffer, int len) {
+#ifdef HAVE_SSL
+ if(!iofd->sslnode) return 0;
+ int ret = SSL_read(iofd->sslnode->sslHandle, buffer, len);
+ int update = (iofd->ssl_hs_read || iofd->ssl_hs_write);
+ iofd->ssl_hs_read = 0;
+ iofd->ssl_hs_write = 0;
+ switch(SSL_get_error(iofd->sslnode->sslHandle, ret)) {
+ case SSL_ERROR_NONE:
+ case SSL_ERROR_ZERO_RETURN:
+ if(update)
+ iohandler_update(iofd);
+ return ret;
+ break;
+ case SSL_ERROR_WANT_READ:
+ iofd->ssl_hs_read = 1;
+ iohandler_update(iofd);
+ iohandler_log(IOLOG_DEBUG, "SSL_read for %s (fd: %d) returned SSL_ERROR_WANT_READ", iohandler_iotype_name(iofd->type), iofd->fd);
+ errno = EAGAIN;
+ return -1;
+ break;
+ case SSL_ERROR_WANT_WRITE:
+ iofd->ssl_hs_write = 1;
+ iohandler_update(iofd);
+ iohandler_log(IOLOG_DEBUG, "SSL_read for %s (fd: %d) returned SSL_ERROR_WANT_WRITE", iohandler_iotype_name(iofd->type), iofd->fd);
+ errno = EAGAIN;
+ return -1;
+ break;
+ default:
+ iohandler_log(IOLOG_ERROR, "SSL_read for %s (fd: %d) failed with ", iohandler_iotype_name(iofd->type), iofd->fd);
+ return -1;
+ break;
+ }
+#endif
+ return 0;
+}
+
+int iohandler_ssl_write(struct IODescriptor *iofd, char *buffer, int len) {
+#ifdef HAVE_SSL
+ if(!iofd->sslnode) return 0;
+ int ret = SSL_write(iofd->sslnode->sslHandle, buffer, len);
+ int update = (iofd->ssl_hs_read || iofd->ssl_hs_write);
+ iofd->ssl_hs_read = 0;
+ iofd->ssl_hs_write = 0;
+ switch(SSL_get_error(iofd->sslnode->sslHandle, ret)) {
+ case SSL_ERROR_NONE:
+ case SSL_ERROR_ZERO_RETURN:
+ if(update)
+ iohandler_update(iofd);
+ return ret;
+ break;
+ case SSL_ERROR_WANT_READ:
+ iofd->ssl_hs_read = 1;
+ iohandler_update(iofd);
+ iohandler_log(IOLOG_DEBUG, "SSL_write for %s (fd: %d) returned SSL_ERROR_WANT_READ", iohandler_iotype_name(iofd->type), iofd->fd);
+ errno = EAGAIN;
+ return -1;
+ break;
+ case SSL_ERROR_WANT_WRITE:
+ iofd->ssl_hs_write = 1;
+ iohandler_update(iofd);
+ iohandler_log(IOLOG_DEBUG, "SSL_write for %s (fd: %d) returned SSL_ERROR_WANT_WRITE", iohandler_iotype_name(iofd->type), iofd->fd);
+ errno = EAGAIN;
+ return -1;
+ break;
+ default:
+ iohandler_log(IOLOG_ERROR, "SSL_write for %s (fd: %d) failed with ", iohandler_iotype_name(iofd->type), iofd->fd);
+ return -1;
+ break;
+ }
+#endif
+ return 0;
+}
--- /dev/null
+/* IOHandler_SSL.h - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _IOHandler_SSL_h
+#define _IOHandler_SSL_h
+
+struct IODescriptor;
+
+#ifdef HAVE_SSL
+#include <openssl/rand.h>
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+
+struct IOSSLNode {
+ SSL *sslHandle;
+ SSL_CTX *sslContext;
+};
+#else
+struct IOSSLNode {
+ //just unused
+};
+#endif
+
+void iohandler_ssl_init();
+void iohandler_ssl_connect(struct IODescriptor *iofd);
+void iohandler_ssl_client_handshake(struct IODescriptor *iofd);
+void iohandler_ssl_disconnect(struct IODescriptor *iofd);
+int iohandler_ssl_read(struct IODescriptor *iofd, char *buffer, int len);
+int iohandler_ssl_write(struct IODescriptor *iofd, char *buffer, int len);
+
+#endif
--- /dev/null
+
+CC = gcc
+CFLAGS = -g -O0 -Wall -Wshadow -Werror
+LDFLAGS = -lws2_32
+
+OBJ = IOEngine_epoll.o IOEngine_kevent.o IOEngine_select.o IOHandler.o IOHandler_SSL.o main.o
+
+all: $(OBJ)
+ $(CC) $(CFLAGS) -oiotest $(OBJ) $(LDFLAGS)
+
+%.o: %.c
+ $(CC) $(CFLAGS) -c $<
--- /dev/null
+/* main.c - IOMultiplexer
+ * Copyright (C) 2012 Philipp Kreil (pk910)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include "IOHandler.h"
+
+static IOHANDLER_CALLBACK(io_callback);
+static IOHANDLER_LOG_BACKEND(io_log);
+
+int main(int argc, char *argv[]) {
+ iolog_backend = io_log;
+
+ iohandler_connect("pk910.de", 6667, 0, NULL, io_callback);
+
+ struct IODescriptor *iofd;
+ iofd = iohandler_add(0, IOTYPE_STDIN, NULL, io_callback);
+ iofd->read_lines = 1;
+
+ while(1) {
+ iohandler_poll();
+ }
+}
+
+static IOHANDLER_CALLBACK(io_callback) {
+ switch(event->type) {
+ case IOEVENT_CONNECTED:
+ printf("[connect]\n");
+ break;
+ case IOEVENT_RECV:
+ printf("[in] %s\n", event->data.recv_str);
+ break;
+ default:
+ break;
+ }
+}
+
+static IOHANDLER_LOG_BACKEND(io_log) {
+ printf("%s\n", line);
+}
projects / IOMultiplexer.git / commitdiff