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libipc-old
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New, simpler libipc API.

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Philippe PITTOLI 2019-06-03 21:25:59 +02:00
parent 878432e7eb
commit 33cd215790
20 changed files with 1384 additions and 976 deletions
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195
Makefile
View File

@ -11,8 +11,8 @@ MANDIR := $(SHAREDIR)/man
CC := cc
AR := ar
RANLIB := ranlib
CFLAGS :=
LDFLAGS :=
CFLAGS :=
LDFLAGS :=
Q := @
@ -28,7 +28,7 @@ libipc.clean: libipc.so.clean libipc.a.clean
libipc.uninstall: libipc.so.uninstall libipc.a.uninstall
src/ipc.h.install: src/ipc.h
@echo ' IN > $(INCLUDEDIR)/ipc.h'
@echo ' IN > $(INCLUDEDIR)/ipc.h'
$(Q)mkdir -p '$(DESTDIR)$(INCLUDEDIR)'
$(Q)install -m0644 src/ipc.h $(DESTDIR)$(INCLUDEDIR)/ipc.h
@ -36,169 +36,169 @@ src/ipc.h.clean: src/ipc.h
$(Q):
src/ipc.h.uninstall:
@echo ' RM > $(INCLUDEDIR)/ipc.h'
@echo ' RM > $(INCLUDEDIR)/ipc.h'
$(Q)rm -f '$(DESTDIR)$(INCLUDEDIR)/ipc.h'
man/libipc.7: man/libipc.7.md
@echo ' MAN > man/libipc.7'
@echo ' MAN > man/libipc.7'
$(Q)pandoc -s --from markdown --to man 'man/libipc.7.md' -o 'man/libipc.7'
man/libipc.7.install: man/libipc.7
@echo ' IN > $(MANDIR)/man7/libipc.7'
@echo ' IN > $(MANDIR)/man7/libipc.7'
$(Q)mkdir -p '$(DESTDIR)$(MANDIR)/man7'
$(Q)install -m0644 man/libipc.7 $(DESTDIR)$(MANDIR)/man7/libipc.7
man/libipc.7.clean:
@echo ' RM > man/libipc.7'
@echo ' RM > man/libipc.7'
$(Q)rm -f man/libipc.7
man/libipc.7.uninstall:
@echo ' RM > $(MANDIR)/man7/libipc.7'
@echo ' RM > $(MANDIR)/man7/libipc.7'
$(Q)rm -f '$(DESTDIR)$(MANDIR)/man7/libipc.7'
libipc.so: src/client.o src/communication.o src/logger.o src/message.o src/usocket.o src/utils.o
@echo ' LD > libipc.so'
$(Q)$(CC) -o libipc.so -shared $(LDFLAGS) src/client.o src/communication.o src/logger.o src/message.o src/usocket.o src/utils.o
libipc.so: src/communication.o src/error.o src/logger.o src/message.o src/usocket.o src/utils.o
@echo ' LD > libipc.so'
$(Q)$(CC) -o libipc.so -shared $(LDFLAGS) src/communication.o src/error.o src/logger.o src/message.o src/usocket.o src/utils.o
libipc.so.install: libipc.so
@echo ' IN > $(LIBDIR)/libipc.so.0.1.0'
@echo ' IN > $(LIBDIR)/libipc.so.0.1.0'
$(Q)mkdir -p '$(DESTDIR)$(LIBDIR)'
$(Q)install -m0755 libipc.so $(DESTDIR)$(LIBDIR)/libipc.so.0.1.0
@echo ' LN > $(LIBDIR)/libipc.so.0.1'
@echo ' LN > $(LIBDIR)/libipc.so.0.1'
$(Q)ln -sf '$(LIBDIR)/libipc.so.0.1.0' '$(DESTDIR)/$(LIBDIR)/libipc.so.0.1'
@echo ' LN > $(LIBDIR)/libipc.so.0'
@echo ' LN > $(LIBDIR)/libipc.so.0'
$(Q)ln -sf '$(LIBDIR)/libipc.so.0.1.0' '$(DESTDIR)/$(LIBDIR)/libipc.so.0'
@echo ' LN > $(LIBDIR)/libipc.so'
@echo ' LN > $(LIBDIR)/libipc.so'
$(Q)ln -sf '$(LIBDIR)/libipc.so.0.1.0' '$(DESTDIR)/$(LIBDIR)/libipc.so'
libipc.so.clean:
@echo ' RM > libipc.so'
@echo ' RM > libipc.so'
$(Q)rm -f libipc.so
libipc.so.uninstall:
@echo ' RM > $(LIBDIR)/libipc.so.0.1.0'
@echo ' RM > $(LIBDIR)/libipc.so.0.1.0'
$(Q)rm -f '$(DESTDIR)$(LIBDIR)/libipc.so.0.1.0'
@echo ' RM > $(LIBDIR)/libipc.so.0.1'
@echo ' RM > $(LIBDIR)/libipc.so.0.1'
$(Q)rm -f '$(DESTDIR)$(LIBDIR)/libipc.so.0.1'
@echo ' RM > $(LIBDIR)/libipc.so.0'
@echo ' RM > $(LIBDIR)/libipc.so.0'
$(Q)rm -f '$(DESTDIR)$(LIBDIR)/libipc.so.0'
@echo ' RM > $(LIBDIR)/libipc.so'
@echo ' RM > $(LIBDIR)/libipc.so'
$(Q)rm -f '$(DESTDIR)$(LIBDIR)/libipc.so'
libipc.a: src/client.o src/communication.o src/logger.o src/message.o src/usocket.o src/utils.o
@echo ' LD > libipc.a'
$(Q)$(AR) rc 'libipc.a' src/client.o src/communication.o src/logger.o src/message.o src/usocket.o src/utils.o
libipc.a: src/communication.o src/error.o src/logger.o src/message.o src/usocket.o src/utils.o
@echo ' LD > libipc.a'
$(Q)$(AR) rc 'libipc.a' src/communication.o src/error.o src/logger.o src/message.o src/usocket.o src/utils.o
libipc.a.install: libipc.a
@echo ' IN > $(LIBDIR)/libipc.a'
@echo ' IN > $(LIBDIR)/libipc.a'
$(Q)mkdir -p '$(DESTDIR)$(LIBDIR)'
$(Q)install -m0755 libipc.a $(DESTDIR)$(LIBDIR)/libipc.a
libipc.a.clean:
@echo ' RM > libipc.a'
@echo ' RM > libipc.a'
$(Q)rm -f libipc.a
libipc.a.uninstall:
@echo ' RM > $(LIBDIR)/libipc.a'
@echo ' RM > $(LIBDIR)/libipc.a'
$(Q)rm -f '$(DESTDIR)$(LIBDIR)/libipc.a'
src/client.o: src/client.c src/client.h
@echo ' CC > src/client.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/client.c -fPIC -o src/client.o
src/client.o.install:
src/client.o.clean:
@echo ' RM > src/client.o'
$(Q)rm -f src/client.o
src/client.o.uninstall:
src/communication.o: src/communication.c src/communication.h src/utils.h src/error.h src/event.h
@echo ' CC > src/communication.o'
src/communication.o: src/communication.c src/ipc.h src/utils.h src/message.h
@echo ' CC > src/communication.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/communication.c -fPIC -o src/communication.o
src/communication.o.install:
src/communication.o.clean:
@echo ' RM > src/communication.o'
@echo ' RM > src/communication.o'
$(Q)rm -f src/communication.o
src/communication.o.uninstall:
src/error.o: src/error.c src/ipc.h
@echo ' CC > src/error.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/error.c -fPIC -o src/error.o
src/error.o.install:
src/error.o.clean:
@echo ' RM > src/error.o'
$(Q)rm -f src/error.o
src/error.o.uninstall:
src/logger.o: src/logger.c src/logger.h
@echo ' CC > src/logger.o'
@echo ' CC > src/logger.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/logger.c -fPIC -o src/logger.o
src/logger.o.install:
src/logger.o.clean:
@echo ' RM > src/logger.o'
@echo ' RM > src/logger.o'
$(Q)rm -f src/logger.o
src/logger.o.uninstall:
src/message.o: src/message.c src/message.h src/error.h src/usocket.h
@echo ' CC > src/message.o'
src/message.o: src/message.c src/message.h src/usocket.h
@echo ' CC > src/message.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/message.c -fPIC -o src/message.o
src/message.o.install:
src/message.o.clean:
@echo ' RM > src/message.o'
@echo ' RM > src/message.o'
$(Q)rm -f src/message.o
src/message.o.uninstall:
src/usocket.o: src/usocket.c src/usocket.h src/utils.h src/error.h
@echo ' CC > src/usocket.o'
src/usocket.o: src/usocket.c src/usocket.h src/utils.h
@echo ' CC > src/usocket.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/usocket.c -fPIC -o src/usocket.o
src/usocket.o.install:
src/usocket.o.clean:
@echo ' RM > src/usocket.o'
@echo ' RM > src/usocket.o'
$(Q)rm -f src/usocket.o
src/usocket.o.uninstall:
src/utils.o: src/utils.c src/utils.h
@echo ' CC > src/utils.o'
@echo ' CC > src/utils.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/utils.c -fPIC -o src/utils.o
src/utils.o.install:
src/utils.o.clean:
@echo ' RM > src/utils.o'
@echo ' RM > src/utils.o'
$(Q)rm -f src/utils.o
src/utils.o.uninstall:
$(DESTDIR)$(PREFIX):
@echo ' DIR > $(PREFIX)'
@echo ' DIR > $(PREFIX)'
$(Q)mkdir -p $(DESTDIR)$(PREFIX)
$(DESTDIR)$(BINDIR):
@echo ' DIR > $(BINDIR)'
@echo ' DIR > $(BINDIR)'
$(Q)mkdir -p $(DESTDIR)$(BINDIR)
$(DESTDIR)$(LIBDIR):
@echo ' DIR > $(LIBDIR)'
@echo ' DIR > $(LIBDIR)'
$(Q)mkdir -p $(DESTDIR)$(LIBDIR)
$(DESTDIR)$(SHAREDIR):
@echo ' DIR > $(SHAREDIR)'
@echo ' DIR > $(SHAREDIR)'
$(Q)mkdir -p $(DESTDIR)$(SHAREDIR)
$(DESTDIR)$(INCLUDEDIR):
@echo ' DIR > $(INCLUDEDIR)'
@echo ' DIR > $(INCLUDEDIR)'
$(Q)mkdir -p $(DESTDIR)$(INCLUDEDIR)
$(DESTDIR)$(MANDIR):
@echo ' DIR > $(MANDIR)'
@echo ' DIR > $(MANDIR)'
$(Q)mkdir -p $(DESTDIR)$(MANDIR)
install: subdirs.install libipc.install src/ipc.h.install man/libipc.7.install libipc.so.install libipc.a.install src/client.o.install src/communication.o.install src/logger.o.install src/message.o.install src/usocket.o.install src/utils.o.install src/client.o.install src/communication.o.install src/logger.o.install src/message.o.install src/usocket.o.install src/utils.o.install
install: subdirs.install libipc.install src/ipc.h.install man/libipc.7.install libipc.so.install libipc.a.install src/communication.o.install src/error.o.install src/logger.o.install src/message.o.install src/usocket.o.install src/utils.o.install src/communication.o.install src/error.o.install src/logger.o.install src/message.o.install src/usocket.o.install src/utils.o.install
@:
subdirs.install:
uninstall: subdirs.uninstall libipc.uninstall src/ipc.h.uninstall man/libipc.7.uninstall libipc.so.uninstall libipc.a.uninstall src/client.o.uninstall src/communication.o.uninstall src/logger.o.uninstall src/message.o.uninstall src/usocket.o.uninstall src/utils.o.uninstall src/client.o.uninstall src/communication.o.uninstall src/logger.o.uninstall src/message.o.uninstall src/usocket.o.uninstall src/utils.o.uninstall
uninstall: subdirs.uninstall libipc.uninstall src/ipc.h.uninstall man/libipc.7.uninstall libipc.so.uninstall libipc.a.uninstall src/communication.o.uninstall src/error.o.uninstall src/logger.o.uninstall src/message.o.uninstall src/usocket.o.uninstall src/utils.o.uninstall src/communication.o.uninstall src/error.o.uninstall src/logger.o.uninstall src/message.o.uninstall src/usocket.o.uninstall src/utils.o.uninstall
@:
subdirs.uninstall:
@ -208,7 +208,7 @@ test: all subdirs subdirs.test
subdirs.test:
clean: libipc.clean src/ipc.h.clean man/libipc.7.clean libipc.so.clean libipc.a.clean src/client.o.clean src/communication.o.clean src/logger.o.clean src/message.o.clean src/usocket.o.clean src/utils.o.clean src/client.o.clean src/communication.o.clean src/logger.o.clean src/message.o.clean src/usocket.o.clean src/utils.o.clean
clean: libipc.clean src/ipc.h.clean man/libipc.7.clean libipc.so.clean libipc.a.clean src/communication.o.clean src/error.o.clean src/logger.o.clean src/message.o.clean src/usocket.o.clean src/utils.o.clean src/communication.o.clean src/error.o.clean src/logger.o.clean src/message.o.clean src/usocket.o.clean src/utils.o.clean
distclean: clean
@ -221,21 +221,18 @@ distdir:
dist-gz: $(PACKAGE)-$(VERSION).tar.gz
$(PACKAGE)-$(VERSION).tar.gz: distdir
@echo ' TAR > $(PACKAGE)-$(VERSION).tar.gz'
@echo ' TAR > $(PACKAGE)-$(VERSION).tar.gz'
$(Q)tar czf $(PACKAGE)-$(VERSION).tar.gz \
$(PACKAGE)-$(VERSION)/Makefile \
$(PACKAGE)-$(VERSION)/project.zsh \
$(PACKAGE)-$(VERSION)/src/error.h \
$(PACKAGE)-$(VERSION)/src/ipc.h \
$(PACKAGE)-$(VERSION)/src/event.h \
$(PACKAGE)-$(VERSION)/man/libipc.7.md \
$(PACKAGE)-$(VERSION)/src/client.c \
$(PACKAGE)-$(VERSION)/src/communication.c \
$(PACKAGE)-$(VERSION)/src/error.c \
$(PACKAGE)-$(VERSION)/src/logger.c \
$(PACKAGE)-$(VERSION)/src/message.c \
$(PACKAGE)-$(VERSION)/src/usocket.c \
$(PACKAGE)-$(VERSION)/src/utils.c \
$(PACKAGE)-$(VERSION)/src/client.h \
$(PACKAGE)-$(VERSION)/src/communication.h \
$(PACKAGE)-$(VERSION)/src/logger.h \
$(PACKAGE)-$(VERSION)/src/message.h \
@ -244,21 +241,18 @@ $(PACKAGE)-$(VERSION).tar.gz: distdir
dist-xz: $(PACKAGE)-$(VERSION).tar.xz
$(PACKAGE)-$(VERSION).tar.xz: distdir
@echo ' TAR > $(PACKAGE)-$(VERSION).tar.xz'
@echo ' TAR > $(PACKAGE)-$(VERSION).tar.xz'
$(Q)tar cJf $(PACKAGE)-$(VERSION).tar.xz \
$(PACKAGE)-$(VERSION)/Makefile \
$(PACKAGE)-$(VERSION)/project.zsh \
$(PACKAGE)-$(VERSION)/src/error.h \
$(PACKAGE)-$(VERSION)/src/ipc.h \
$(PACKAGE)-$(VERSION)/src/event.h \
$(PACKAGE)-$(VERSION)/man/libipc.7.md \
$(PACKAGE)-$(VERSION)/src/client.c \
$(PACKAGE)-$(VERSION)/src/communication.c \
$(PACKAGE)-$(VERSION)/src/error.c \
$(PACKAGE)-$(VERSION)/src/logger.c \
$(PACKAGE)-$(VERSION)/src/message.c \
$(PACKAGE)-$(VERSION)/src/usocket.c \
$(PACKAGE)-$(VERSION)/src/utils.c \
$(PACKAGE)-$(VERSION)/src/client.h \
$(PACKAGE)-$(VERSION)/src/communication.h \
$(PACKAGE)-$(VERSION)/src/logger.h \
$(PACKAGE)-$(VERSION)/src/message.h \
@ -267,21 +261,18 @@ $(PACKAGE)-$(VERSION).tar.xz: distdir
dist-bz2: $(PACKAGE)-$(VERSION).tar.bz2
$(PACKAGE)-$(VERSION).tar.bz2: distdir
@echo ' TAR > $(PACKAGE)-$(VERSION).tar.bz2'
@echo ' TAR > $(PACKAGE)-$(VERSION).tar.bz2'
$(Q)tar cjf $(PACKAGE)-$(VERSION).tar.bz2 \
$(PACKAGE)-$(VERSION)/Makefile \
$(PACKAGE)-$(VERSION)/project.zsh \
$(PACKAGE)-$(VERSION)/src/error.h \
$(PACKAGE)-$(VERSION)/src/ipc.h \
$(PACKAGE)-$(VERSION)/src/event.h \
$(PACKAGE)-$(VERSION)/man/libipc.7.md \
$(PACKAGE)-$(VERSION)/src/client.c \
$(PACKAGE)-$(VERSION)/src/communication.c \
$(PACKAGE)-$(VERSION)/src/error.c \
$(PACKAGE)-$(VERSION)/src/logger.c \
$(PACKAGE)-$(VERSION)/src/message.c \
$(PACKAGE)-$(VERSION)/src/usocket.c \
$(PACKAGE)-$(VERSION)/src/utils.c \
$(PACKAGE)-$(VERSION)/src/client.h \
$(PACKAGE)-$(VERSION)/src/communication.h \
$(PACKAGE)-$(VERSION)/src/logger.h \
$(PACKAGE)-$(VERSION)/src/message.h \
@ -289,38 +280,38 @@ $(PACKAGE)-$(VERSION).tar.bz2: distdir
$(PACKAGE)-$(VERSION)/src/utils.h
help:
@echo ' :: ipc-0.1.0'
@echo ' :: ipc-0.1.0'
@echo ''
@echo 'Generic targets:'
@echo ' - help  Prints this help message.'
@echo ' - all  Builds all targets.'
@echo ' - dist  Creates tarballs of the files of the project.'
@echo ' - install  Installs the project.'
@echo ' - clean  Removes compiled files.'
@echo ' - uninstall  Deinstalls the project.'
@echo 'Generic targets:'
@echo ' - help Prints this help message.'
@echo ' - all Builds all targets.'
@echo ' - dist Creates tarballs of the files of the project.'
@echo ' - install Installs the project.'
@echo ' - clean Removes compiled files.'
@echo ' - uninstall Deinstalls the project.'
@echo ''
@echo 'CLI-modifiable variables:'
@echo ' - CC  ${CC}'
@echo ' - CFLAGS  ${CFLAGS}'
@echo ' - LDFLAGS  ${LDFLAGS}'
@echo ' - DESTDIR  ${DESTDIR}'
@echo ' - PREFIX  ${PREFIX}'
@echo ' - BINDIR  ${BINDIR}'
@echo ' - LIBDIR  ${LIBDIR}'
@echo ' - SHAREDIR  ${SHAREDIR}'
@echo ' - INCLUDEDIR  ${INCLUDEDIR}'
@echo ' - MANDIR  ${MANDIR}'
@echo 'CLI-modifiable variables:'
@echo ' - CC ${CC}'
@echo ' - CFLAGS ${CFLAGS}'
@echo ' - LDFLAGS ${LDFLAGS}'
@echo ' - DESTDIR ${DESTDIR}'
@echo ' - PREFIX ${PREFIX}'
@echo ' - BINDIR ${BINDIR}'
@echo ' - LIBDIR ${LIBDIR}'
@echo ' - SHAREDIR ${SHAREDIR}'
@echo ' - INCLUDEDIR ${INCLUDEDIR}'
@echo ' - MANDIR ${MANDIR}'
@echo ''
@echo 'Project targets: '
@echo ' - libipc  library'
@echo ' - src/ipc.h  header'
@echo ' - man/libipc.7  man'
@echo 'Project targets: '
@echo ' - libipc library'
@echo ' - src/ipc.h header'
@echo ' - man/libipc.7 man'
@echo ''
@echo 'Makefile options:'
@echo 'Makefile options:'
@echo ' - gnu: false'
@echo ' - colors: true'
@echo ' - colors: false'
@echo ''
@echo 'Rebuild the Makefile with:'
@echo ' zsh ./build.zsh -c'
@echo 'Rebuild the Makefile with:'
@echo ' zsh ./build.zsh'
.PHONY: all subdirs clean distclean dist install uninstall help

14
examples/README.md Normal file
View File

@ -0,0 +1,14 @@
# how to compile
./build.sh
# how to launch
export IPC_RUNDIR=/tmp
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:../
./pongd
# in another terminal
export IPC_RUNDIR=/tmp
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:../
./pong

13
examples/build.sh Executable file
View File

@ -0,0 +1,13 @@
#!/bin/sh
nontapmsg() {
echo $*
}
for i in *.c
do
f=`echo $i | sed "s/.c$//"`
nontapmsg "compiling $f"
# gcc $f.c ./lib/*.o -o $f -I../src -I ./lib/ -L../ -L./lib/ -lipc -Wall -g -Wextra
gcc -Wall -g -Wextra $f.c -o $f -I../src -L../ ../src/ipc.h -lipc
done

166
examples/pong.c Normal file
View File

@ -0,0 +1,166 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../src/ipc.h"
#define MSG "coucou"
#define SERVICE_NAME "pongd"
#define PRINTERR(ret,msg) {\
const char * err = ipc_errors_get (ret);\
fprintf(stderr, "error while %s: %s\n", msg, err);\
}
void non_interactive (char *env[])
{
struct ipc_message m;
memset (&m, 0, sizeof (struct ipc_message));
struct ipc_connection_info srv;
memset (&srv, 0, sizeof (struct ipc_connection_info));
// index and version should be filled
srv.index = 0;
srv.version = 0;
enum ipc_errors ret;
// init service
ret = ipc_connection (env, &srv, SERVICE_NAME);
if (ret != IPC_ERROR_NONE) {
handle_err("main", "ipc_application_connection < 0");
PRINTERR(ret, "application connection");
exit (EXIT_FAILURE);
}
printf ("msg to send (%ld): %.*s\n", (ssize_t) strlen(MSG) +1, (int) strlen(MSG), MSG);
ret = ipc_message_format_data (&m, MSG, (ssize_t) strlen(MSG) +1);
if (ret != IPC_ERROR_NONE) {
PRINTERR(ret, "message format data");
exit (EXIT_FAILURE);
}
// printf ("msg to send in the client: ");
// ipc_message_print (&m);
ret = ipc_write (&srv, &m);
if (ret != IPC_ERROR_NONE) {
handle_err("main", "application_write");
PRINTERR(ret, "application write");
exit (EXIT_FAILURE);
}
ipc_message_empty (&m);
ret = ipc_read (&srv, &m);
if (ret != IPC_ERROR_NONE) {
handle_err("main", "application_read");
PRINTERR(ret, "application read");
exit (EXIT_FAILURE);
}
printf ("msg recv: %s\n", m.payload);
ipc_message_empty (&m);
ret = ipc_close (&srv);
if (ret != IPC_ERROR_NONE) {
handle_err("main", "application_close");
PRINTERR(ret, "application close");
exit (EXIT_FAILURE);
}
}
void interactive (char *env[])
{
enum ipc_errors ret;
struct ipc_connection_info srv;
memset (&srv, 0, sizeof (struct ipc_connection_info));
// index and version should be filled
srv.index = 0;
srv.version = 0;
// init service
ret = ipc_connection (env, &srv, SERVICE_NAME);
if (ret != IPC_ERROR_NONE) {
handle_err ("main", "ipc_application_connection < 0");
PRINTERR(ret, "application connection");
exit (EXIT_FAILURE);
}
struct ipc_event event;
memset (&event, 0, sizeof (struct ipc_event));
struct ipc_connection_infos services;
memset (&services, 0, sizeof (struct ipc_connection_infos));
ipc_add (&services, &srv);
ipc_add_fd (&services, 0); // add STDIN
while (1) {
printf ("msg to send: ");
fflush (stdout);
ret = ipc_wait_event (&services, NULL, &event);
if (ret != IPC_ERROR_NONE) {
handle_error("ipc_application_peek_event != 0");
PRINTERR(ret, "application peek event");
exit (EXIT_FAILURE);
}
switch (event.type) {
case IPC_EVENT_TYPE_EXTRA_SOCKET:
{
struct ipc_message *m = event.m;
if ( m->length == 0 || strncmp (m->payload, "exit", 4) == 0) {
ipc_message_empty (m);
free (m);
ipc_connections_free (&services);
ret = ipc_close (&srv);
if (ret != IPC_ERROR_NONE) {
handle_err("main", "application_close < 0");
PRINTERR(ret, "application close");
exit (EXIT_FAILURE);
}
exit (EXIT_SUCCESS);
}
ret = ipc_write (&srv, m);
if (ret != IPC_ERROR_NONE) {
handle_err("main", "application_write < 0");
PRINTERR(ret, "application write");
exit (EXIT_FAILURE);
}
}
break;
case IPC_EVENT_TYPE_MESSAGE:
{
struct ipc_message *m = event.m;
printf ("msg recv: %.*s", m->length, m->payload);
};
break;
case IPC_EVENT_TYPE_DISCONNECTION:
case IPC_EVENT_TYPE_NOT_SET:
case IPC_EVENT_TYPE_CONNECTION:
case IPC_EVENT_TYPE_ERROR:
default :
fprintf (stderr, "should not happen, event type %d\n", event.type);
}
}
}
int main (int argc, char *argv[], char *env[])
{
argc = argc; // warnings
argv = argv; // warnings
if (argc == 1)
non_interactive (env);
else
interactive (env);
return EXIT_SUCCESS;
}

173
examples/pongd.c Normal file
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@ -0,0 +1,173 @@
#include "../src/ipc.h"
#include <signal.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#define PONGD_SERVICE_NAME "pongd"
#define PRINTERR(ret,msg) {\
const char * err = ipc_errors_get (ret);\
fprintf(stderr, "error while %s: %s\n", msg, err);\
}
int cpt = 0;
struct ipc_connection_info *srv = NULL;
struct ipc_connection_infos *clients = NULL;
void main_loop ()
{
enum ipc_errors ret = 0;
clients = malloc (sizeof (struct ipc_connection_infos));
memset(clients, 0, sizeof(struct ipc_connection_infos));
struct ipc_event event;
memset(&event, 0, sizeof (struct ipc_event));
event.type = IPC_EVENT_TYPE_NOT_SET;
while(1) {
// ipc_service_poll_event provides one event at a time
// warning: event->m is free'ed if not NULL
printf ("before poll\n"); // TODO remove
ret = ipc_wait_event (clients, srv, &event);
if (ret != IPC_ERROR_NONE && ret != IPC_ERROR_CLOSED_RECIPIENT) {
handle_error("ipc_service_poll_event != IPC_ERROR_NONE");
PRINTERR(ret,"service poll event");
// the application will shut down, and close the service
ret = ipc_server_close (srv);
if (ret != IPC_ERROR_NONE) {
handle_error("ipc_server_close < 0");
PRINTERR(ret,"server close");
}
exit (EXIT_FAILURE);
}
switch (event.type) {
case IPC_EVENT_TYPE_CONNECTION:
{
cpt++;
printf ("connection: %d clients connected\n", cpt);
printf ("new client has the fd %d\n", (event.origin)->fd);
};
break;
case IPC_EVENT_TYPE_DISCONNECTION:
{
cpt--;
printf ("disconnection: %d clients remaining\n", cpt);
// free the ipc_client structure
free (event.origin);
};
break;
case IPC_EVENT_TYPE_MESSAGE:
{
struct ipc_message *m = event.m;
if (m->length > 0) {
printf ("message received (type %d): %.*s\n", m->type, m->length, m->payload);
}
ret = ipc_write (event.origin, m);
if (ret != IPC_ERROR_NONE) {
handle_err( "handle_new_msg", "server_write < 0");
PRINTERR(ret,"server write");
}
};
break;
case IPC_EVENT_TYPE_ERROR:
{
fprintf (stderr, "a problem happened with client %d\n"
, (event.origin)->fd);
};
break;
default :
{
fprintf (stderr, "there must be a problem, event not set\n");
};
}
}
// should never go there
exit (EXIT_FAILURE);
}
void exit_program(int signal)
{
printf("Quitting, signal: %d\n", signal);
// free remaining clients
for (int i = 0; i < clients->size ; i++) {
struct ipc_connection_info *cli = clients->cinfos[i];
if (cli != NULL) {
free (cli);
}
clients->cinfos[i] = NULL;
}
ipc_connections_free (clients);
free (clients);
// the application will shut down, and close the service
enum ipc_errors ret = ipc_server_close (srv);
if (ret != IPC_ERROR_NONE) {
handle_error("ipc_server_close < 0");
PRINTERR(ret,"server close");
}
free (srv);
exit(EXIT_SUCCESS);
}
/*
* service ping-pong: send back everything sent by the clients
* stop the program on SIG{TERM,INT,ALRM,USR{1,2},HUP} signals
*/
int main(int argc, char * argv[], char **env)
{
argc = argc; // warnings
argv = argv; // warnings
printf ("pid = %d\n", getpid ());
srv = malloc (sizeof (struct ipc_connection_info));
if (srv == NULL) {
exit (EXIT_FAILURE);
}
memset (srv, 0, sizeof (struct ipc_connection_info));
srv->type = '\0';
srv->index = 0;
srv->version = 0;
srv->fd = 0;
srv->spath = NULL;
enum ipc_errors ret = ipc_server_init (env, srv, PONGD_SERVICE_NAME);
if (ret != IPC_ERROR_NONE) {
handle_error("ipc_server_init != IPC_ERROR_NONE");
PRINTERR(ret,"server init");
return EXIT_FAILURE;
}
printf ("Listening on %s.\n", srv->spath);
printf("MAIN: server created\n" );
signal (SIGHUP, exit_program);
signal (SIGALRM, exit_program);
signal (SIGUSR1, exit_program);
signal (SIGUSR2, exit_program);
signal (SIGTERM, exit_program);
signal (SIGINT, exit_program);
// the service will loop until the end of time, or a signal
main_loop ();
// main_loop should not return
return EXIT_FAILURE;
}

115
man/libipc.7.md
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@ -10,18 +10,118 @@ section: 7
libipc - Simple, easy-to-use IPC library
# SYNOPSIS
**`#include <ipc.h>`**
**`...`**
# DESCRIPTION
**libipc** is a library that provides interprocess communication medium between applications.
It provides both client and server code.
# USAGE
# SYNOPSIS
**`#include <ipc.h>`**
## Initialization, exchanges, disconnection
// server initialization\
*enum ipc_errors* **ipc_server_init** (*char* \*\*env , *struct ipc_connection_info* \*srv, *const char* \*sname);\
// connection establishement to a server\
*enum ipc_errors* **ipc_connection** (*char* \*\*env, *struct ipc_connection_info* \*, *const char* \*);\
// closing a server\
*enum ipc_errors* **ipc_server_close** (*struct ipc_connection_info* \*srv);\
// closing a connection\
*enum ipc_errors* **ipc_close** (*struct ipc_connection_info* \*p);\
*enum ipc_errors* **ipc_accept** (*struct ipc_connection_info* \*srv, *struct ipc_connection_info* \*p);
*enum ipc_errors* **ipc_read** (*const struct ipc_connection_info* \*, *struct ipc_message* \*m);\
*enum ipc_errors* **ipc_write** (*const struct ipc_connection_info* \*, *const struct ipc_message* \*m);\
*enum ipc_errors* **ipc_wait_event** (*struct ipc_connection_infos* \*clients, *struct ipc_connection_info* \*srv, *struct ipc_event* \*event);
// store and remove only pointers on allocated structures\
*enum ipc_errors* **ipc_add** (*struct ipc_connection_infos* \*cinfos, *struct ipc_connection_info* \*cinfo);\
*enum ipc_errors* **ipc_del** (*struct ipc_connection_infos* \*cinfos, *struct ipc_connection_info* \*cinfo);
// add an arbitrary file descriptor to read\
*enum ipc_errors* **ipc_add_fd** (*struct ipc_connection_infos* \*cinfos, *int* fd);
## Message functions
// create msg structure with a certain payload length (0 for no payload memory allocation)\
*enum ipc_errors* **ipc_message_new** (*struct ipc_message* \*\*m, *ssize_t* paylen);\
// create msg structure from buffer\
*enum ipc_errors* **ipc_message_format_read** (*struct ipc_message* \*m, *const char* \*buf, *ssize_t* msize);\
// create buffer from msg structure\
*enum ipc_errors* **ipc_message_format_write** (*const struct ipc_message* \*m, *char* \*\*buf, *ssize_t* \*msize);\
// read a structure msg from fd\
*enum ipc_errors* **ipc_message_read** (*int32_t* fd, *struct ipc_message* \*m);\
// write a structure msg to fd\
*enum ipc_errors* **ipc_message_write** (*int32_t* fd, *const struct ipc_message* \*m);\
*enum ipc_errors* **ipc_message_format** (*struct ipc_message* \*m, *char* type, *const char* \*payload, *ssize_t* length);\
*enum ipc_errors* **ipc_message_format_data** (*struct ipc_message* \*m, *const char* \*payload, *ssize_t* length);\
*enum ipc_errors* **ipc_message_format_server_close** (*struct ipc_message* \*m);\
*enum ipc_errors* **ipc_message_empty** (*struct ipc_message* \*m);
# STRUCTURES
struct ipc_connection_info {
uint32_t version;
uint32_t index;
int32_t fd;
char type; // may be an arbitrary fd
char *spath; // max size: PATH_MAX, used to store unix socket path
};
struct ipc_connection_infos {
struct ipc_connection_info ** cinfos;
int32_t size;
};
struct ipc_message {
char type;
uint32_t length;
char *payload;
};
struct ipc_event {
enum ipc_event_type type;
void* origin; // currently used as an client or service pointer
void* m; // message pointer
};
# ENUMERATIONS
enum msg_types {
MSG_TYPE_SERVER_CLOSE = 0
, MSG_TYPE_ERR
, MSG_TYPE_DATA
} message_types;
Function **ipc_wait_event** returns an *event type* structure.\
The event may be a (dis)connection, received data or an error.\
It also can be *IPC_EVENT_TYPE_EXTRA_SOCKET* since an arbitrary file descriptor can be added to the *ipc_connection_infos* structure with **ipc_add_fd**.
enum ipc_event_type {
IPC_EVENT_TYPE_NOT_SET
, IPC_EVENT_TYPE_ERROR
, IPC_EVENT_TYPE_EXTRA_SOCKET
, IPC_EVENT_TYPE_CONNECTION
, IPC_EVENT_TYPE_DISCONNECTION
, IPC_EVENT_TYPE_MESSAGE
};
enum ipc_errors {
...
};
# EXAMPLES
Examples are available in the */examples* directory.
# NOTES
@ -31,5 +131,4 @@ It provides both client and server code.
- Documentation is currently limited.
- Rerouting IPC connexions through other services (for example, through a network bridge service) is currently not possible.
- Errors management is currently limited, and precise errors cannot be distinguished.

2
project.zsh
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@ -11,5 +11,5 @@ type[src/ipc.h]=header
type[man/libipc.7]=man
dist=(Makefile project.zsh src/error.h src/ipc.h src/event.h man/*.md)
dist=(Makefile project.zsh src/ipc.h man/*.md)

108
src/client.c
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@ -1,108 +0,0 @@
#include "client.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct ipc_client * ipc_server_client_copy (const struct ipc_client *p)
{
if (p == NULL)
return NULL;
struct ipc_client * copy = malloc (sizeof(struct ipc_client));
memset (copy, 0, sizeof (struct ipc_client));
memcpy (copy, p, sizeof (struct ipc_client));
return copy;
}
int32_t ipc_server_client_eq (const struct ipc_client *p1, const struct ipc_client *p2)
{
return (p1->version == p2->version && p1->index == p2->index
&& p1->proc_fd == p2->proc_fd);
}
void ipc_server_client_gen (struct ipc_client *p
, uint32_t index, uint32_t version)
{
p->version = version;
p->index = index;
}
int32_t ipc_clients_add (struct ipc_clients *clients, struct ipc_client *p)
{
assert(clients != NULL);
assert(p != NULL);
clients->size++;
clients->clients = realloc(clients->clients
, sizeof(struct ipc_client) * clients->size);
if (clients->clients == NULL) {
return -1;
}
clients->clients[clients->size - 1] = p;
return 0;
}
int32_t ipc_clients_del (struct ipc_clients *clients, struct ipc_client *p)
{
assert(clients != NULL);
assert(p != NULL);
if (clients->clients == NULL) {
return -1;
}
int32_t i;
for (i = 0; i < clients->size; i++) {
if (clients->clients[i] == p) {
clients->clients[i] = clients->clients[clients->size-1];
clients->size--;
if (clients->size == 0) {
ipc_clients_free (clients);
}
else {
clients->clients = realloc(clients->clients
, sizeof(struct ipc_client) * clients->size);
if (clients->clients == NULL) {
return -2;
}
}
return 0;
}
}
return -3;
}
void client_print (struct ipc_client *p)
{
if (p != NULL)
printf ("client %d : index %d, version %d\n"
, p->proc_fd, p->index, p->version);
}
void ipc_clients_print (struct ipc_clients *ap)
{
int32_t i;
for (i = 0; i < ap->size; i++) {
printf("%d : ", i);
client_print(ap->clients[i]);
}
}
void ipc_clients_free (struct ipc_clients *ap)
{
if (ap->clients != NULL) {
free (ap->clients);
ap->clients = NULL;
}
ap->size = 0;
}

10
src/client.h
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@ -1,10 +0,0 @@
#ifndef __IPC_CLIENT_H__
#define __IPC_CLIENT_H__
#include <stdint.h>
#include "ipc.h"
void ipc_clients_print (struct ipc_clients *);
void client_print (struct ipc_client *);
#endif

727
src/communication.c
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@ -1,309 +1,227 @@
#include "communication.h"
#include "ipc.h"
#include "utils.h"
#include "error.h"
#include "event.h"
#include <unistd.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <errno.h> // error numbers
#include <stdlib.h>
#include <string.h>
// print structures
#include "message.h"
void service_path (char *path, const char *sname, int32_t index, int32_t version)
{
assert (path != NULL);
assert (sname != NULL);
memset (path, 0, PATH_MAX);
snprintf (path, PATH_MAX, "%s/%s-%d-%d", RUNDIR, sname, index, version);
char * rundir = getenv ("IPC_RUNDIR");
if (rundir == NULL)
rundir = RUNDIR;
snprintf (path, PATH_MAX, "%s/%s-%d-%d", rundir, sname, index, version);
}
int32_t ipc_server_init (char **env
, struct ipc_service *srv, const char *sname)
/*calculer le max filedescriptor*/
static int32_t get_max_fd (struct ipc_connection_infos *cinfos)
{
int32_t i;
int32_t max = 0;
for (i = 0; i < cinfos->size; i++ ) {
if (cinfos->cinfos[i]->fd > max) {
max = cinfos->cinfos[i]->fd;
}
}
return max;
}
enum ipc_errors ipc_server_init (char **env, struct ipc_connection_info *srv, const char *sname)
{
if (env == NULL)
return IPC_ERROR_SERVER_INIT__NO_ENVIRONMENT_PARAM;
if (srv == NULL)
return IPC_ERROR_WRONG_PARAMETERS;
return IPC_ERROR_SERVER_INIT__NO_SERVICE_PARAM;
// TODO
// use env parameters
// it will be useful to change some parameters transparently
// ex: to get resources from other machines, choosing the
// remote with environment variables
if (sname == NULL)
return IPC_ERROR_SERVER_INIT__NO_SERVER_NAME_PARAM;
// TODO: loop over environment variables
// any IPC_NETWORK_* should be shared with the network service
// in order to route requests over any chosen protocol stack
// ex: IPC_NETWORK_AUDIO="tor://some.example.com/"
env = env;
// gets the service path
service_path (srv->spath, sname, srv->index, srv->version);
char buf [PATH_MAX];
memset (buf, 0, PATH_MAX);
service_path (buf, sname, srv->index, srv->version);
int32_t ret = usock_init (&srv->service_fd, srv->spath);
if (ret < 0) {
handle_err ("ipc_server_init", "usock_init ret < 0");
return -1;
// gets the service path
if (srv->spath != NULL) {
free (srv->spath);
}
return 0;
}
size_t s = strlen (buf);
srv->spath = malloc (s+1);
if (srv->spath == NULL) {
return IPC_ERROR_SERVER_INIT__MALLOC;
}
memcpy (srv->spath, buf, s);
srv->spath[s] = '\0'; // to be sure
int32_t ipc_server_accept (struct ipc_service *srv, struct ipc_client *p)
{
assert (srv != NULL);
assert (p != NULL);
int32_t ret = usock_accept (srv->service_fd, &p->proc_fd);
if (ret < 0) {
handle_err ("ipc_server_accept", "usock_accept < 0");
return -1;
enum ipc_errors ret = usock_init (&srv->fd, srv->spath);
if (ret != IPC_ERROR_NONE) {
handle_err ("ipc_server_init", "usock_init");
return ret;
}
return 0;
return IPC_ERROR_NONE;
}
// empty the srv structure
int32_t ipc_server_close (struct ipc_service *srv)
enum ipc_errors ipc_connection (char **env, struct ipc_connection_info *srv, const char *sname)
{
usock_close (srv->service_fd);
int32_t ret = usock_remove (srv->spath);
ipc_service_empty (srv);
return ret;
}
int32_t ipc_server_close_client (struct ipc_client *p)
{
return usock_close (p->proc_fd);
}
int32_t ipc_server_read (const struct ipc_client *p, struct ipc_message *m)
{
return ipc_message_read (p->proc_fd, m);
}
int32_t ipc_server_write (const struct ipc_client *p, const struct ipc_message *m)
{
return ipc_message_write (p->proc_fd, m);
}
int32_t ipc_application_connection (char **env
, struct ipc_service *srv, const char *sname)
{
// TODO
// use env parameters
// it will be useful to change some parameters transparently
// ex: to get resources from other machines, choosing the
// remote with environment variables
// TODO: loop over environment variables
// any IPC_NETWORK_* should be shared with the network service
// in order to route requests over any chosen protocol stack
// ex: IPC_NETWORK_AUDIO="tor://some.example.com/"
env = env;
if (env == NULL)
return IPC_ERROR_CONNECTION__NO_ENVIRONMENT_PARAM;
assert (srv != NULL);
assert (sname != NULL);
if (srv == NULL) {
return -1;
return IPC_ERROR_CONNECTION__NO_SERVER;
}
if (sname == NULL) {
return IPC_ERROR_CONNECTION__NO_SERVICE_NAME;
}
// gets the service path
service_path (srv->spath, sname, srv->index, srv->version);
char buf [PATH_MAX];
memset (buf, 0, PATH_MAX);
service_path (buf, sname, srv->index, srv->version);
int32_t ret = usock_connect (&srv->service_fd, srv->spath);
if (ret < 0) {
handle_err ("ipc_application_connection", "usock_connect ret <= 0");
return -1;
enum ipc_errors ret = usock_connect (&srv->fd, buf);
if (ret != IPC_ERROR_NONE) {
handle_err ("ipc_connection", "usock_connect ret");
return ret;
}
return 0;
return IPC_ERROR_NONE;
}
// close the socket
int32_t ipc_application_close (struct ipc_service *srv)
enum ipc_errors ipc_server_close (struct ipc_connection_info *srv)
{
return usock_close (srv->service_fd);
usock_close (srv->fd);
enum ipc_errors ret = usock_remove (srv->spath);
if (srv->spath != NULL) {
free (srv->spath);
srv->spath = NULL;
}
return ret;
}
int32_t ipc_application_read (struct ipc_service *srv, struct ipc_message *m)
{
return ipc_message_read (srv->service_fd, m);
}
int32_t ipc_application_write (struct ipc_service *srv, const struct ipc_message *m)
enum ipc_errors ipc_close (struct ipc_connection_info *p)
{
return ipc_message_write (srv->service_fd, m);
return usock_close (p->fd);
}
/*calculer le max filedescriptor*/
static int32_t get_max_fd_from_ipc_clients_ (struct ipc_clients *clients)
enum ipc_errors ipc_accept (struct ipc_connection_info *srv, struct ipc_connection_info *p)
{
int32_t i;
int32_t max = 0;
assert (srv != NULL);
assert (p != NULL);
for (i = 0; i < clients->size; i++ ) {
if (clients->clients[i]->proc_fd > max) {
max = clients->clients[i]->proc_fd;
}
}
return max;
}
static int32_t get_max_fd_from_ipc_services_ (struct ipc_services *services)
{
int32_t i;
int32_t max = 0;
for (i = 0; i < services->size; i++ ) {
if (services->services[i]->service_fd > max) {
max = services->services[i]->service_fd;
}
}
return max;
}
/*
* ipc_server_select prend en parametre
* * un tableau de client qu'on écoute
* * le service qui attend de nouvelles connexions
* * un tableau de client qui souhaitent parler
*
* 0 = OK
* -1 = error
*/
int32_t ipc_server_select (struct ipc_clients *clients, struct ipc_service *srv
, struct ipc_clients *active_clients, int32_t *new_connection)
{
*new_connection = 0;
assert (clients != NULL);
assert (active_clients != NULL);
// delete previous read active_clients array
ipc_clients_free (active_clients);
int32_t i, j;
/* master file descriptor list */
fd_set master;
fd_set readf;
/* maximum file descriptor number */
int32_t fdmax;
/* listening socket descriptor */
int32_t listener = srv->service_fd;
/* clear the master and temp sets */
FD_ZERO(&master);
FD_ZERO(&readf);
/* add the listener to the master set */
FD_SET(listener, &master);
for (i=0; i < clients->size; i++) {
FD_SET(clients->clients[i]->proc_fd, &master);
}
/* keep track of the biggest file descriptor */
fdmax = get_max_fd_from_ipc_clients_ (clients) > srv->service_fd ? get_max_fd_from_ipc_clients_ (clients) : srv->service_fd;
readf = master;
if(select(fdmax+1, &readf, NULL, NULL, NULL) == -1) {
perror("select");
return -1;
if (srv == NULL) {
return IPC_ERROR_ACCEPT__NO_SERVICE_PARAM;
}
for (i = 0; i <= fdmax; i++) {
if (FD_ISSET(i, &readf)) {
if (i == listener) {
*new_connection = 1;
} else {
for(j = 0; j < clients->size; j++) {
if(i == clients->clients[j]->proc_fd ) {
ipc_clients_add (active_clients, clients->clients[j]);
}
}
}
}
if (p == NULL) {
return IPC_ERROR_ACCEPT__NO_CLIENT_PARAM;
}
return 0;
enum ipc_errors ret = usock_accept (srv->fd, &p->fd);
if (ret != IPC_ERROR_NONE) {
handle_err ("ipc_accept", "usock_accept");
return IPC_ERROR_ACCEPT;
}
return IPC_ERROR_NONE;
}
/*
* ipc_application_select prend en parametre
* * un tableau de server qu'on écoute
* * le service qui attend de nouvelles connexions
* * un tableau de client qui souhaitent parler
*
* 0 = OK
* -1 = error
*/
int32_t ipc_application_select (struct ipc_services *services, struct ipc_services *active_services)
enum ipc_errors ipc_read (const struct ipc_connection_info *p, struct ipc_message *m)
{
assert (services != NULL);
assert (active_services != NULL);
// delete previous read active_services array
ipc_services_free (active_services);
int32_t i, j;
/* master file descriptor list */
fd_set master;
fd_set readf;
/* maximum file descriptor number */
int32_t fdmax;
/* clear the master and temp sets */
FD_ZERO(&master);
FD_ZERO(&readf);
for (i=0; i < services->size; i++) {
FD_SET(services->services[i]->service_fd, &master);
}
/* keep track of the biggest file descriptor */
fdmax = get_max_fd_from_ipc_services_ (services);
readf = master;
if(select(fdmax+1, &readf, NULL, NULL, NULL) == -1) {
perror("select");
return -1;
}
for (i = 0; i <= fdmax; i++) {
if (FD_ISSET(i, &readf)) {
for(j = 0; j < services->size; j++) {
if(i == services->services[j]->service_fd ) {
ipc_services_add (active_services, services->services[j]);
}
}
}
}
return 0;
return ipc_message_read (p->fd, m);
}
int32_t handle_new_connection (struct ipc_service *srv
, struct ipc_clients *clients
, struct ipc_client **new_client)
enum ipc_errors ipc_write (const struct ipc_connection_info *p, const struct ipc_message *m)
{
*new_client = malloc(sizeof(struct ipc_client));
memset(*new_client, 0, sizeof(struct ipc_client));
if (ipc_server_accept (srv, *new_client) < 0) {
handle_error("server_accept < 0");
return 1;
} else {
// printf("new connection\n");
}
if (ipc_clients_add (clients, *new_client) < 0) {
handle_error("ipc_clients_add < 0");
return 1;
}
return 0;
return ipc_message_write (p->fd, m);
}
int32_t ipc_service_poll_event (struct ipc_clients *clients, struct ipc_service *srv
enum ipc_errors handle_new_connection (struct ipc_connection_info *cinfo
, struct ipc_connection_infos *cinfos
, struct ipc_connection_info **new_client)
{
if (cinfo == NULL) {
return IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFO_PARAM;
}
if (cinfos == NULL) {
return IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFOS_PARAM;
}
*new_client = malloc(sizeof(struct ipc_connection_info));
if (*new_client == NULL) {
return IPC_ERROR_HANDLE_NEW_CONNECTION__MALLOC;
}
memset(*new_client, 0, sizeof(struct ipc_connection_info));
enum ipc_errors ret = ipc_accept (cinfo, *new_client);
if (ret != IPC_ERROR_NONE) {
handle_error("server_accept error");
return ret;
}
ret = ipc_add (cinfos, *new_client);
if (ret != IPC_ERROR_NONE) {
handle_error("ipc_clients_add error");
return ret;
}
return IPC_ERROR_NONE;
}
// TODO: should replace
// ipc_service_poll_event
// ipc_application_poll_event
// ipc_application_peek_event
// ipc_application_poll_event_
enum ipc_errors ipc_wait_event (struct ipc_connection_infos *cinfos
, struct ipc_connection_info *cinfo // NULL for clients
, struct ipc_event *event)
{
assert (clients != NULL);
assert (cinfos != NULL);
if (cinfos == NULL) {
return IPC_ERROR_WAIT_EVENT__NO_CLIENTS_PARAM;
}
if (event == NULL) {
return IPC_ERROR_WAIT_EVENT__NO_EVENT_PARAM;
}
IPC_EVENT_CLEAN(event);
@ -312,44 +230,55 @@ int32_t ipc_service_poll_event (struct ipc_clients *clients, struct ipc_service
fd_set master;
fd_set readf;
/* maximum file descriptor number */
int32_t fdmax;
/* listening socket descriptor */
int32_t listener = srv->service_fd;
/* clear the master and temp sets */
FD_ZERO(&master);
FD_ZERO(&readf);
/* add the listener to the master set */
FD_SET(listener, &master);
for (i=0; i < clients->size; i++) {
FD_SET(clients->clients[i]->proc_fd, &master);
}
/* maximum file descriptor number */
/* keep track of the biggest file descriptor */
fdmax = get_max_fd_from_ipc_clients_ (clients) > srv->service_fd ? get_max_fd_from_ipc_clients_ (clients) : srv->service_fd;
int32_t fdmax = get_max_fd (cinfos);
/* listening socket descriptor */
int32_t listener;
if (cinfo != NULL) {
listener = cinfo->fd;
/* add the listener to the master set */
FD_SET(listener, &master);
// if listener is max fd
if (fdmax < listener)
fdmax = listener;
}
for (i=0; i < cinfos->size; i++) {
FD_SET(cinfos->cinfos[i]->fd, &master);
}
readf = master;
if(select(fdmax+1, &readf, NULL, NULL, NULL) == -1) {
perror("select");
return -1;
return IPC_ERROR_WAIT_EVENT__SELECT;
}
for (i = 0; i <= fdmax; i++) {
if (FD_ISSET(i, &readf)) {
if (i == listener) {
if (cinfo != NULL && i == listener) {
// connection
struct ipc_client *new_client = NULL;
handle_new_connection (srv, clients, &new_client);
struct ipc_connection_info *new_client = NULL;
enum ipc_errors ret = handle_new_connection (cinfo, cinfos, &new_client);
if (ret != IPC_ERROR_NONE) {
// TODO: quit the program
return ret;
}
IPC_EVENT_SET (event, IPC_EVENT_TYPE_CONNECTION, NULL, new_client);
return 0;
return IPC_ERROR_NONE;
} else {
for(j = 0; j < clients->size; j++) {
if(i == clients->clients[j]->proc_fd ) {
for(j = 0; j < cinfos->size; j++) {
if(i == cinfos->cinfos[j]->fd ) {
// listen to what they have to say (disconnection or message)
// then add a client to `event`, the ipc_event structure
int32_t ret = 0;
enum ipc_errors ret;
struct ipc_message *m = NULL;
m = malloc (sizeof(struct ipc_message));
if (m == NULL) {
@ -358,24 +287,27 @@ int32_t ipc_service_poll_event (struct ipc_clients *clients, struct ipc_service
memset (m, 0, sizeof (struct ipc_message));
// current talking client
struct ipc_client *pc = clients->clients[j];
ret = ipc_server_read (pc, m);
if (ret < 0) {
handle_err ("ipc_service_poll_event", "ipc_server_read < 0");
struct ipc_connection_info *pc = cinfos->cinfos[j];
ret = ipc_read (pc, m);
if (ret != IPC_ERROR_NONE && ret != IPC_ERROR_CLOSED_RECIPIENT) {
handle_err ("ipc_wait_event", "ipc_read");
ipc_message_empty (m);
free (m);
IPC_EVENT_SET(event, IPC_EVENT_TYPE_ERROR, NULL, pc);
return IPC_ERROR_READ;
return ret;
}
// disconnection: close the client then delete it from clients
if (ret == 1) {
if (ipc_server_close_client (pc) < 0) {
handle_err( "ipc_service_poll_event", "ipc_server_close_client < 0");
// disconnection: close the client then delete it from cinfos
if (ret == IPC_ERROR_CLOSED_RECIPIENT) {
ret = ipc_close (pc);
if (ret != IPC_ERROR_NONE) {
handle_err( "ipc_wait_event", "ipc_close");
}
if (ipc_clients_del (clients, pc) < 0) {
handle_err( "ipc_service_poll_event", "ipc_clients_del < 0");
ret = ipc_del (cinfos, pc);
if (ret != IPC_ERROR_NONE) {
handle_err( "ipc_wait_event", "ipc_del");
}
ipc_message_empty (m);
free (m);
@ -383,131 +315,178 @@ int32_t ipc_service_poll_event (struct ipc_clients *clients, struct ipc_service
IPC_EVENT_SET(event, IPC_EVENT_TYPE_DISCONNECTION, NULL, pc);
// warning: do not forget to free the ipc_client structure
return 0;
return IPC_ERROR_NONE;
}
// we received a new message from a client
IPC_EVENT_SET (event, IPC_EVENT_TYPE_MESSAGE, m, pc);
return 0;
// we received a new message
// from a client
if (pc->type == 'a') {
IPC_EVENT_SET (event, IPC_EVENT_TYPE_EXTRA_SOCKET, m, pc);
}
else {
IPC_EVENT_SET (event, IPC_EVENT_TYPE_MESSAGE, m, pc);
}
return IPC_ERROR_NONE;
}
}
}
}
}
return 0;
return IPC_ERROR_NONE;
}
int32_t ipc_application_poll_event_ (struct ipc_services *services, struct ipc_event *event, int32_t interactive)
// store and remove only pointers on allocated structures
enum ipc_errors ipc_add (struct ipc_connection_infos *cinfos, struct ipc_connection_info *p)
{
assert (services != NULL);
assert(cinfos != NULL);
assert(p != NULL);
IPC_EVENT_CLEAN(event);
int32_t i, j;
/* master file descriptor list */
fd_set master;
fd_set readf;
/* maximum file descriptor number */
int32_t fdmax;
/* clear the master and temp sets */
FD_ZERO(&master);
FD_ZERO(&readf);
if (interactive) {
FD_SET(0, &master);
}
for (i=0; i < services->size; i++) {
FD_SET(services->services[i]->service_fd, &master);
if (cinfos == NULL) {
return IPC_ERROR_ADD__NO_PARAM_CLIENTS;
}
/* keep track of the biggest file descriptor */
fdmax = get_max_fd_from_ipc_services_ (services);
if (p == NULL) {
return IPC_ERROR_ADD__NO_PARAM_CLIENT;
}
readf = master;
if(select(fdmax+1, &readf, NULL, NULL, NULL) == -1) {
perror("select");
return -1;
cinfos->size++;
cinfos->cinfos = realloc(cinfos->cinfos, sizeof(struct ipc_connection_info) * cinfos->size);
if (cinfos->cinfos == NULL) {
return IPC_ERROR_ADD__EMPTY_LIST;
}
cinfos->cinfos[cinfos->size - 1] = p;
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_del (struct ipc_connection_infos *cinfos, struct ipc_connection_info *p)
{
assert(cinfos != NULL);
assert(p != NULL);
if (cinfos == NULL) {
return IPC_ERROR_DEL__NO_CLIENTS_PARAM;
}
if (p == NULL) {
return IPC_ERROR_DEL__NO_CLIENT_PARAM;
}
if (cinfos->cinfos == NULL) {
return IPC_ERROR_DEL__EMPTY_LIST;
}
int32_t i;
for (i = 0; i < cinfos->size; i++) {
if (cinfos->cinfos[i] == p) {
cinfos->cinfos[i] = cinfos->cinfos[cinfos->size-1];
cinfos->size--;
if (cinfos->size == 0) {
ipc_connections_free (cinfos);
}
else {
cinfos->cinfos = realloc(cinfos->cinfos, sizeof(struct ipc_connection_info) * cinfos->size);
if (cinfos->cinfos == NULL) {
return IPC_ERROR_DEL__EMPTIED_LIST;
}
}
return IPC_ERROR_NONE;
}
}
return IPC_ERROR_DEL__CANNOT_FIND_CLIENT;
}
void ipc_connections_free (struct ipc_connection_infos *cinfos)
{
if (cinfos->cinfos != NULL) {
free (cinfos->cinfos);
cinfos->cinfos = NULL;
}
cinfos->size = 0;
}
// TODO: should replace ipc_client_server_copy and ipc_server_client_copy
struct ipc_connection_info * ipc_connection_copy (const struct ipc_connection_info *p)
{
if (p == NULL)
return NULL;
struct ipc_connection_info * copy = malloc (sizeof(struct ipc_connection_info));
if (copy == NULL)
return NULL;
memset (copy, 0, sizeof (struct ipc_connection_info));
memcpy (copy, p, sizeof (struct ipc_connection_info));
return copy;
}
// TODO: should replace ipc_server_client_eq, ipc_service_eq
int8_t ipc_connection_eq (const struct ipc_connection_info *p1, const struct ipc_connection_info *p2)
{
return (p1->type == p2->type && p1->version == p2->version && p1->index == p2->index && p1->fd == p2->fd);
}
// create the client service structure
// TODO: should replace ipc_client_server_gen, ipc_server_client_gen
enum ipc_errors ipc_connection_gen (struct ipc_connection_info *cinfo
, uint32_t index, uint32_t version, int fd, char type)
{
if (cinfo == NULL) {
return IPC_ERROR_CONNECTION_GEN__NO_CINFO;
}
for (i = 0; i <= fdmax; i++) {
if (FD_ISSET(i, &readf)) {
cinfo->type = type;
cinfo->version = version;
cinfo->index = index;
cinfo->fd = fd;
// interactive: input on stdin
if (i == 0) {
// XXX: by default, message type is 0
struct ipc_message *m = malloc (sizeof (struct ipc_message));
if (m == NULL) {
return IPC_ERROR_NOT_ENOUGH_MEMORY;
}
memset (m, 0, sizeof (struct ipc_message));
m->payload = malloc (IPC_MAX_MESSAGE_SIZE);
return IPC_ERROR_NONE;
}
m->length = read(0, m->payload , IPC_MAX_MESSAGE_SIZE);
IPC_EVENT_SET(event, IPC_EVENT_TYPE_STDIN, m, NULL);
return 0;
}
for(j = 0; j < services->size; j++) {
if(i == services->services[j]->service_fd ) {
// listen to what they have to say (disconnection or message)
// then add a client to `event`, the ipc_event structure
int32_t ret = 0;
struct ipc_message *m = NULL;
m = malloc (sizeof(struct ipc_message));
if (m == NULL) {
return IPC_ERROR_NOT_ENOUGH_MEMORY;
}
memset (m, 0, sizeof (struct ipc_message));
// current talking client
struct ipc_service *ps = services->services[j];
ret = ipc_application_read (ps, m);
if (ret < 0) {
handle_err ("ipc_application_poll_event", "ipc_application_read < 0");
ipc_message_empty (m);
free (m);
IPC_EVENT_SET(event, IPC_EVENT_TYPE_ERROR, NULL, ps);
return IPC_ERROR_READ;
}
// disconnection: close the service
if (ret == 1) {
if (ipc_application_close (ps) < 0) {
handle_err( "ipc_application_poll_event", "ipc_application_close < 0");
}
if (ipc_services_del (services, ps) < 0) {
handle_err( "ipc_application_poll_event", "ipc_services_del < 0");
}
ipc_message_empty (m);
free (m);
IPC_EVENT_SET(event, IPC_EVENT_TYPE_DISCONNECTION, NULL, ps);
// warning: do not forget to free the ipc_client structure
return 0;
}
// we received a new message from a client
IPC_EVENT_SET (event, IPC_EVENT_TYPE_MESSAGE, m, ps);
return 0;
}
}
}
// add an arbitrary file descriptor to read
enum ipc_errors ipc_add_fd (struct ipc_connection_infos *cinfos, int fd)
{
if (cinfos == NULL) {
return IPC_ERROR_ADD_FD__NO_PARAM_CINFOS;
}
return 0;
struct ipc_connection_info *cinfo;
enum ipc_errors ret;
ret = ipc_connection_gen (cinfo, 0, 0, fd, 'a');
return IPC_ERROR_NONE;
}
int32_t ipc_application_poll_event (struct ipc_services *services, struct ipc_event *event) {
return ipc_application_poll_event_ (services, event, 0);
void ipc_connection_print (struct ipc_connection_info *cinfo)
{
if (cinfo == NULL) {
return;
}
printf ("fd %d: index %d, version %d, type %c"
, cinfo->fd, cinfo->index, cinfo->version, cinfo->type);
if (cinfo->spath != NULL) {
printf (", path %s\n", cinfo->spath);
}
else {
printf ("\n");
}
}
int32_t ipc_application_peek_event (struct ipc_services *services, struct ipc_event *event) {
return ipc_application_poll_event_ (services, event, 1);
void ipc_connections_print (struct ipc_connection_infos *cinfos)
{
int32_t i;
for (i = 0; i < cinfos->size; i++) {
printf("[%d] : ", i);
ipc_connection_print(cinfos->cinfos[i]);
}
}

16
src/communication.h
View File

@ -1,20 +1,4 @@
#ifndef __IPC_COMMUNICATION_H__
#define __IPC_COMMUNICATION_H__
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h> // error numbers
#include "ipc.h"
#include "client.h"
#include "event.h"
#include "message.h"
#define IPC_WITH_UNIX_SOCKETS
#ifdef IPC_WITH_UNIX_SOCKETS
#include "usocket.h"
#endif
#endif

113
src/error.c Normal file
View File

@ -0,0 +1,113 @@
#include "ipc.h"
#define NTAB(t) ((int) (sizeof (t) / sizeof (t)[0]))
struct ipc_errors_verbose {
enum ipc_errors error_code;
char * explanation_string;
};
static struct ipc_errors_verbose ipc_errors_verbose [] = {
/* general errors */
IPC_ERROR_NONE, "no error"
, IPC_ERROR_NOT_ENOUGH_MEMORY, "not enough memory"
, IPC_ERROR_CLOSED_RECIPIENT, "closed recipient"
, IPC_ERROR_SERVER_INIT__NO_ENVIRONMENT_PARAM, "ipc_server_init: no environment param"
, IPC_ERROR_SERVER_INIT__NO_SERVICE_PARAM, "ipc_server_init: no service param"
, IPC_ERROR_SERVER_INIT__NO_SERVER_NAME_PARAM, "ipc_server_init: no server name param"
, IPC_ERROR_SERVER_INIT__MALLOC, "ipc_server_init: error on malloc function"
, IPC_ERROR_CONNECTION__NO_SERVER, "ipc_connection: no server parameter"
, IPC_ERROR_CONNECTION__NO_SERVICE_NAME, "ipc_connection: no service name parameter"
, IPC_ERROR_CONNECTION__NO_ENVIRONMENT_PARAM, "ipc_connection: no environment param"
, IPC_ERROR_CONNECTION_GEN__NO_CINFO, "ipc_connection_gen: no cinfo"
, IPC_ERROR_ACCEPT__NO_SERVICE_PARAM, "ipc_accept: no service param"
, IPC_ERROR_ACCEPT__NO_CLIENT_PARAM, "ipc_accept: no client param"
, IPC_ERROR_ACCEPT, "ipc_accept: error on accept function"
, IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFO_PARAM, "ipc_handle_new_connection: no cinfo param"
, IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFOS_PARAM, "ipc_handle_new_connection: no cinfos param"
, IPC_ERROR_WAIT_EVENT__SELECT, "ipc_wait_event: error on the select function"
, IPC_ERROR_WAIT_EVENT__NO_CLIENTS_PARAM, "ipc_wait_event: no clients param"
, IPC_ERROR_WAIT_EVENT__NO_EVENT_PARAM, "ipc_wait_event: no event param"
, IPC_ERROR_HANDLE_NEW_CONNECTION__MALLOC, "ipc_handle_new_connection: error on malloc function"
, IPC_ERROR_ADD__EMPTY_LIST, "ipc_clients_add: empty list: realloc failed"
, IPC_ERROR_ADD__NO_PARAM_CLIENTS, "ipc_clients_add: no param client list"
, IPC_ERROR_ADD__NO_PARAM_CLIENT, "ipc_clients_add: no param client"
, IPC_ERROR_ADD_FD__NO_PARAM_CINFOS, "ipc_add_fd: no cinfos param"
, IPC_ERROR_DEL__EMPTY_LIST, "ipc_clients_del: empty list"
, IPC_ERROR_DEL__EMPTIED_LIST, "ipc_clients_del: cannot realloc"
, IPC_ERROR_DEL__CANNOT_FIND_CLIENT, "ipc_clients_del: cannot find client"
, IPC_ERROR_DEL__NO_CLIENTS_PARAM, "ipc_clients_del: no clients param"
, IPC_ERROR_DEL__NO_CLIENT_PARAM, "ipc_clients_del: no client param"
/* unix socket */
, IPC_ERROR_USOCK_SEND, "usock_send: cannot send message"
, IPC_ERROR_USOCK_CONNECT__SOCKET, "usock_connect: error on socket function"
, IPC_ERROR_USOCK_CONNECT__WRONG_FILE_DESCRIPTOR, "usock_connect: wrong file descriptor"
, IPC_ERROR_USOCK_CONNECT__EMPTY_PATH, "usock_connect: empty path"
, IPC_ERROR_USOCK_CLOSE, "usock_close: close function"
, IPC_ERROR_USOCK_REMOVE__UNLINK, "usock_remove: unlink function"
, IPC_ERROR_USOCK_REMOVE__NO_FILE, "usock_remove: file not found"
, IPC_ERROR_USOCK_INIT__EMPTY_FILE_DESCRIPTOR, "usock_init: no file descriptor"
, IPC_ERROR_USOCK_INIT__WRONG_FILE_DESCRIPTOR, "usock_init: wrong file descriptor"
, IPC_ERROR_USOCK_INIT__EMPTY_PATH, "usock_init: empty path"
, IPC_ERROR_USOCK_INIT__BIND, "usock_init: error on bind function"
, IPC_ERROR_USOCK_INIT__LISTEN, "usock_init: error on listen function"
, IPC_ERROR_USOCK_ACCEPT__PATH_FILE_DESCRIPTOR, "ipc_usock_accept: no path file descriptor"
, IPC_ERROR_USOCK_ACCEPT, "ipc_usock_accept: error on accept function"
, IPC_ERROR_USOCK_RECV__NO_BUFFER, "ipc_usock_recv: no buffer in usock_recv"
, IPC_ERROR_USOCK_RECV__NO_LENGTH, "ipc_usock_recv: no length in usock_recv"
, IPC_ERROR_USOCK_RECV, "ipc_usock_recv: cannot receive message in usock_recv"
/* message function errors */
, IPC_ERROR_MESSAGE_NEW__NO_MESSAGE_PARAM, "ipc_message_new: no message param"
, IPC_ERROR_MESSAGE_READ__NO_MESSAGE_PARAM, "ipc_message_read: no message param"
, IPC_ERROR_MESSAGE_WRITE__NO_MESSAGE_PARAM, "ipc_message_write: no message param"
, IPC_ERROR_MESSAGE_WRITE__NOT_ENOUGH_DATA, "ipc_message_write: no enough data sent"
, IPC_ERROR_MESSAGE_FORMAT__NO_MESSAGE_PARAM, "ipc_message_format: no message param"
, IPC_ERROR_MESSAGE_FORMAT__INCONSISTENT_PARAMS, "ipc_message_format: inconsistent params"
, IPC_ERROR_MESSAGE_FORMAT__LENGTH, "ipc_message_format: length param > maximum allowed"
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MESSAGE, "ipc_message_format_write: empty message"
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MSIZE, "ipc_message_format_write: empty message size"
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_BUFFER, "ipc_message_format_write: empty buffer"
, IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_MESSAGE, "ipc_message_format_read: empty message"
, IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_BUFFER, "ipc_message_format_read: empty buffer"
, IPC_ERROR_MESSAGE_FORMAT_READ__MESSAGE_SIZE, "ipc_message_format_read: message size > maximum allowed"
, IPC_ERROR_MESSAGE_EMPTY__EMPTY_MESSAGE_LIST, "ipc_message_empty: empty message list"
};
const char * ipc_errors_get (enum ipc_errors e)
{
for (int i = 0 ; i < NTAB(ipc_errors_verbose) ; i++) {
if (ipc_errors_verbose[i].error_code == e) {
return ipc_errors_verbose[i].explanation_string;
}
}
return NULL;
}

18
src/error.h
View File

@ -1,18 +0,0 @@
#ifndef __IPC_ERROR_H__
#define __IPC_ERROR_H__
// #define IPC_WITH_ERRORS 3
#ifdef IPC_WITH_ERRORS
#include "logger.h"
#define handle_error(msg) \
do { log_error (msg); exit(EXIT_FAILURE); } while (0)
#define handle_err(fun,msg)\
do { log_error ("%s: file %s line %d %s", fun, __FILE__, __LINE__, msg); } while (0)
#else
#define handle_error(msg)
#define handle_err(fun,msg)
#endif
#endif

22
src/event.h
View File

@ -1,22 +0,0 @@
#ifndef __IPC_EVENT__
#define __IPC_EVENT__
#include "ipc.h"
#include "message.h"
#define IPC_EVENT_SET(pevent,type_,message_,origin_) {\
pevent->type = type_; \
pevent->m = message_; \
pevent->origin = origin_; \
};
#define IPC_EVENT_CLEAN(pevent) {\
pevent->type = IPC_EVENT_TYPE_NOT_SET;\
if (pevent->m != NULL) {\
ipc_message_empty (pevent->m);\
free(pevent->m);\
pevent->m = NULL;\
}\
};
#endif

278
src/ipc.h
View File

@ -28,40 +28,121 @@ enum msg_types {
enum ipc_event_type {
IPC_EVENT_TYPE_NOT_SET
, IPC_EVENT_TYPE_ERROR
, IPC_EVENT_TYPE_STDIN
, IPC_EVENT_TYPE_EXTRA_SOCKET
, IPC_EVENT_TYPE_CONNECTION
, IPC_EVENT_TYPE_DISCONNECTION
, IPC_EVENT_TYPE_MESSAGE
};
enum ipc_errors {
IPC_ERROR_NOT_ENOUGH_MEMORY
, IPC_ERROR_WRONG_PARAMETERS
, IPC_ERROR_READ
/* general errors */
IPC_ERROR_NONE
, IPC_ERROR_NOT_ENOUGH_MEMORY
, IPC_ERROR_CLOSED_RECIPIENT
, IPC_ERROR_SERVER_INIT__NO_ENVIRONMENT_PARAM
, IPC_ERROR_SERVER_INIT__NO_SERVICE_PARAM
, IPC_ERROR_SERVER_INIT__NO_SERVER_NAME_PARAM
, IPC_ERROR_SERVER_INIT__MALLOC
, IPC_ERROR_CONNECTION__NO_SERVER
, IPC_ERROR_CONNECTION__NO_SERVICE_NAME
, IPC_ERROR_CONNECTION__NO_ENVIRONMENT_PARAM
, IPC_ERROR_CONNECTION_GEN__NO_CINFO
, IPC_ERROR_ACCEPT__NO_SERVICE_PARAM
, IPC_ERROR_ACCEPT__NO_CLIENT_PARAM
, IPC_ERROR_ACCEPT
, IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFO_PARAM
, IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFOS_PARAM
, IPC_ERROR_WAIT_EVENT__SELECT
, IPC_ERROR_WAIT_EVENT__NO_CLIENTS_PARAM
, IPC_ERROR_WAIT_EVENT__NO_EVENT_PARAM
, IPC_ERROR_HANDLE_NEW_CONNECTION__MALLOC
, IPC_ERROR_ADD__EMPTY_LIST
, IPC_ERROR_ADD__NO_PARAM_CLIENTS
, IPC_ERROR_ADD__NO_PARAM_CLIENT
, IPC_ERROR_ADD_FD__NO_PARAM_CINFOS
, IPC_ERROR_DEL__EMPTY_LIST
, IPC_ERROR_DEL__EMPTIED_LIST
, IPC_ERROR_DEL__CANNOT_FIND_CLIENT
, IPC_ERROR_DEL__NO_CLIENTS_PARAM
, IPC_ERROR_DEL__NO_CLIENT_PARAM
/* unix socket */
, IPC_ERROR_USOCK_SEND
, IPC_ERROR_USOCK_CONNECT__SOCKET
, IPC_ERROR_USOCK_CONNECT__WRONG_FILE_DESCRIPTOR
, IPC_ERROR_USOCK_CONNECT__EMPTY_PATH
, IPC_ERROR_USOCK_CLOSE
, IPC_ERROR_USOCK_REMOVE__UNLINK
, IPC_ERROR_USOCK_REMOVE__NO_FILE
, IPC_ERROR_USOCK_INIT__EMPTY_FILE_DESCRIPTOR
, IPC_ERROR_USOCK_INIT__WRONG_FILE_DESCRIPTOR
, IPC_ERROR_USOCK_INIT__EMPTY_PATH
, IPC_ERROR_USOCK_INIT__BIND
, IPC_ERROR_USOCK_INIT__LISTEN
, IPC_ERROR_USOCK_ACCEPT__PATH_FILE_DESCRIPTOR
, IPC_ERROR_USOCK_ACCEPT
, IPC_ERROR_USOCK_RECV__NO_BUFFER
, IPC_ERROR_USOCK_RECV__NO_LENGTH
, IPC_ERROR_USOCK_RECV
/* message function errors */
, IPC_ERROR_MESSAGE_NEW__NO_MESSAGE_PARAM
, IPC_ERROR_MESSAGE_READ__NO_MESSAGE_PARAM
, IPC_ERROR_MESSAGE_WRITE__NO_MESSAGE_PARAM
, IPC_ERROR_MESSAGE_WRITE__NOT_ENOUGH_DATA
, IPC_ERROR_MESSAGE_FORMAT__NO_MESSAGE_PARAM
, IPC_ERROR_MESSAGE_FORMAT__INCONSISTENT_PARAMS
, IPC_ERROR_MESSAGE_FORMAT__LENGTH
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MESSAGE
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MSIZE
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_BUFFER
, IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_MESSAGE
, IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_BUFFER
, IPC_ERROR_MESSAGE_FORMAT_READ__MESSAGE_SIZE
, IPC_ERROR_MESSAGE_EMPTY__EMPTY_MESSAGE_LIST
};
struct ipc_service {
struct ipc_connection_info {
uint32_t version;
uint32_t index;
char spath[PATH_MAX];
int32_t service_fd;
int32_t fd;
char type; // server, client, arbitrary fd
char *spath; // max size: PATH_MAX
};
struct ipc_services {
struct ipc_service ** services;
struct ipc_connection_infos {
struct ipc_connection_info ** cinfos;
int32_t size;
};
struct ipc_client {
uint32_t version;
uint32_t index;
int32_t proc_fd;
};
struct ipc_clients {
struct ipc_client **clients;
int32_t size;
};
struct ipc_message {
char type;
@ -71,111 +152,122 @@ struct ipc_message {
struct ipc_event {
enum ipc_event_type type;
void* origin; // currently used as an client or service pointer
struct ipc_connection_info *origin;
void* m; // message pointer
};
/*
* SERVICE
*
/**
* MACROS
**/
// srv->version and srv->index must be already set
// init unix socket + fill srv->spath
int32_t ipc_server_init (char **env , struct ipc_service *srv, const char *sname);
int32_t ipc_server_close (struct ipc_service *srv);
int32_t ipc_server_close_client (struct ipc_client *p);
int32_t ipc_server_accept (struct ipc_service *srv, struct ipc_client *p);
// #define IPC_WITH_ERRORS 3
// 1 on a recipient socket close
int32_t ipc_server_read (const struct ipc_client *, struct ipc_message *m);
int32_t ipc_server_write (const struct ipc_client *, const struct ipc_message *m);
#ifdef IPC_WITH_ERRORS
#include "logger.h"
#define handle_error(msg) \
do { log_error (msg); exit(EXIT_FAILURE); } while (0)
int32_t ipc_server_select (struct ipc_clients * clients, struct ipc_service *srv
, struct ipc_clients *active_clients, int32_t *new_connection);
#define handle_err(fun,msg)\
do { log_error ("%s: file %s line %d %s", fun, __FILE__, __LINE__, msg); } while (0)
#else
#define handle_error(msg)
#define handle_err(fun,msg)
#endif
int32_t ipc_service_poll_event (struct ipc_clients *clients, struct ipc_service *srv
, struct ipc_event *event);
#define IPC_EVENT_SET(pevent,type_,message_,origin_) {\
pevent->type = type_; \
pevent->m = message_; \
pevent->origin = origin_; \
};
#define IPC_EVENT_CLEAN(pevent) {\
pevent->type = IPC_EVENT_TYPE_NOT_SET;\
if (pevent->m != NULL) {\
ipc_message_empty (pevent->m);\
free(pevent->m);\
pevent->m = NULL;\
}\
};
#define IPC_WITH_UNIX_SOCKETS
#ifdef IPC_WITH_UNIX_SOCKETS
#include "usocket.h"
#endif
#define LOG
void log_error (const char* message, ...);
void log_info (const char* message, ...);
void log_debug (const char* message, ...);
/**
* SERVICES
* main public functions
*/
enum ipc_errors ipc_server_init (char **env, struct ipc_connection_info *srv, const char *sname);
enum ipc_errors ipc_connection (char **env, struct ipc_connection_info *srv, const char *sname);
enum ipc_errors ipc_server_close (struct ipc_connection_info *srv);
enum ipc_errors ipc_close (struct ipc_connection_info *p);
enum ipc_errors ipc_accept (struct ipc_connection_info *srv, struct ipc_connection_info *p);
enum ipc_errors ipc_read (const struct ipc_connection_info *, struct ipc_message *m);
enum ipc_errors ipc_write (const struct ipc_connection_info *, const struct ipc_message *m);
enum ipc_errors ipc_wait_event (struct ipc_connection_infos *clients
, struct ipc_connection_info *srv
, struct ipc_event *event);
// store and remove only pointers on allocated structures
int32_t ipc_services_add (struct ipc_services *, struct ipc_service *);
int32_t ipc_services_del (struct ipc_services *, struct ipc_service *);
enum ipc_errors ipc_add (struct ipc_connection_infos *, struct ipc_connection_info *);
enum ipc_errors ipc_del (struct ipc_connection_infos *, struct ipc_connection_info *);
void ipc_services_free (struct ipc_services *);
// add an arbitrary file descriptor to read
enum ipc_errors ipc_add_fd (struct ipc_connection_infos *cinfos, int fd);
struct ipc_service * ipc_client_server_copy (const struct ipc_service *p);
int32_t ipc_service_eq (const struct ipc_service *p1, const struct ipc_service *p2);
void ipc_connections_free (struct ipc_connection_infos *);
struct ipc_connection_info * ipc_connection_copy (const struct ipc_connection_info *p);
int8_t ipc_connection_eq (const struct ipc_connection_info *p1, const struct ipc_connection_info *p2);
// create the client service structure
void ipc_client_server_gen (struct ipc_service *p, uint32_t index, uint32_t version);
enum ipc_errors ipc_connection_gen (struct ipc_connection_info *cinfo
, uint32_t index, uint32_t version, int fd, char type);
static inline int32_t ipc_service_empty (struct ipc_service *srv) { srv = srv; return 0 ;};
void ipc_connection_print (struct ipc_connection_info *cinfo);
void ipc_connections_print (struct ipc_connection_infos *cinfos);
// get explanation about an error
const char * ipc_errors_get (enum ipc_errors e);
/*
* APPLICATION
*
**/
// Initialize connection with unix socket
// send the connection string to $TMP/<service>
// fill srv->spath && srv->service_fd
int32_t ipc_application_connection (char **env, struct ipc_service *, const char *);
int32_t ipc_application_close (struct ipc_service *);
// 1 on a recipient socket close
int32_t ipc_application_read (struct ipc_service *srv, struct ipc_message *m);
int32_t ipc_application_write (struct ipc_service *, const struct ipc_message *m);
int32_t ipc_application_select (struct ipc_services *services, struct ipc_services *active_services);
int32_t ipc_application_poll_event (struct ipc_services *services, struct ipc_event *event);
int32_t ipc_application_peek_event (struct ipc_services *services, struct ipc_event *event);
/*
* MESSAGE
*
/**
* message functions
**/
// used to create msg structure with a certain payload length (0 for no payload memory allocation)
enum ipc_errors ipc_message_new (struct ipc_message **m, ssize_t paylen);
// used to create msg structure from buffer
int32_t ipc_message_format_read (struct ipc_message *m, const char *buf, ssize_t msize);
enum ipc_errors ipc_message_format_read (struct ipc_message *m, const char *buf, ssize_t msize);
// used to create buffer from msg structure
int32_t ipc_message_format_write (const struct ipc_message *m, char **buf, ssize_t *msize);
enum ipc_errors ipc_message_format_write (const struct ipc_message *m, char **buf, ssize_t *msize);
// read a structure msg from fd
int32_t ipc_message_read (int32_t fd, struct ipc_message *m);
enum ipc_errors ipc_message_read (int32_t fd, struct ipc_message *m);
// write a structure msg to fd
int32_t ipc_message_write (int32_t fd, const struct ipc_message *m);
enum ipc_errors ipc_message_write (int32_t fd, const struct ipc_message *m);
int32_t ipc_message_format (struct ipc_message *m, char type, const char *payload, ssize_t length);
int32_t ipc_message_format_data (struct ipc_message *m, const char *payload, ssize_t length);
int32_t ipc_message_format_server_close (struct ipc_message *m);
enum ipc_errors ipc_message_format (struct ipc_message *m, char type, const char *payload, ssize_t length);
enum ipc_errors ipc_message_format_data (struct ipc_message *m, const char *payload, ssize_t length);
enum ipc_errors ipc_message_format_server_close (struct ipc_message *m);
int32_t ipc_message_empty (struct ipc_message *m);
enum ipc_errors ipc_message_empty (struct ipc_message *m);
/*
* CLIENT
*
**/
// store and remove only pointers on allocated structures
int32_t ipc_clients_add (struct ipc_clients *, struct ipc_client *);
int32_t ipc_clients_del (struct ipc_clients *, struct ipc_client *);
void ipc_clients_free (struct ipc_clients *);
struct ipc_client * ipc_server_client_copy (const struct ipc_client *p);
int32_t ipc_server_client_eq (const struct ipc_client *p1, const struct ipc_client *p2);
// create the service client structure
void ipc_server_client_gen (struct ipc_client *p, uint32_t index, uint32_t version);
// non public functions
void service_path (char *path, const char *sname, int32_t index, int32_t version);
#endif

8
src/logger.h
View File

@ -1,15 +1,9 @@
#ifndef __IPC_LOGGER_H__
#define __IPC_LOGGER_H__
#define LOG
#include <stdarg.h>
void log_error (const char* message, ...);
void log_info (const char* message, ...);
void log_debug (const char* message, ...);
// please use previous functions
// print log, format: date:tag: message
void log_format (const char* tag, const char* message, va_list args);
#endif

156
src/message.c
View File

@ -1,5 +1,10 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "message.h"
#include "error.h"
#include "usocket.h"
#include <assert.h>
@ -12,14 +17,44 @@ void ipc_message_print (const struct ipc_message *m)
#endif
}
int32_t ipc_message_format_read (struct ipc_message *m, const char *buf, ssize_t msize)
enum ipc_errors ipc_message_new (struct ipc_message **m, ssize_t paylen)
{
m = malloc (sizeof(struct ipc_message));
if (m == NULL) {
return IPC_ERROR_MESSAGE_NEW__NO_MESSAGE_PARAM;
}
memset (*m, 0, sizeof (struct ipc_message));
if (paylen != 0) {
((struct ipc_message *)m)->payload = malloc (paylen);
if (((struct ipc_message *)m)->payload == NULL) {
free (*m);
return IPC_ERROR_NOT_ENOUGH_MEMORY;
}
}
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_message_format_read (struct ipc_message *m, const char *buf, ssize_t msize)
{
assert (m != NULL);
assert (buf != NULL);
assert (msize <= IPC_MAX_MESSAGE_SIZE);
if (m == NULL)
return -1;
if (m == NULL) {
return IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_MESSAGE;
}
if (buf == NULL) {
return IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_BUFFER;
}
if (msize > IPC_MAX_MESSAGE_SIZE) {
return IPC_ERROR_MESSAGE_FORMAT_READ__MESSAGE_SIZE;
}
m->type = buf[0];
memcpy (&m->length, buf+1, sizeof m->length);
@ -40,24 +75,27 @@ int32_t ipc_message_format_read (struct ipc_message *m, const char *buf, ssize_t
memcpy (m->payload, buf+IPC_HEADER_SIZE, m->length);
}
return 0;
return IPC_ERROR_NONE;
}
int32_t ipc_message_format_write (const struct ipc_message *m, char **buf, ssize_t *msize)
enum ipc_errors ipc_message_format_write (const struct ipc_message *m, char **buf, ssize_t *msize)
{
assert (m != NULL);
assert (buf != NULL);
assert (msize != NULL);
assert (m->length <= IPC_MAX_MESSAGE_SIZE);
if (m == NULL)
return -1;
if (m == NULL) {
return IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MESSAGE;
}
if (buf == NULL)
return -2;
if (buf == NULL) {
return IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_BUFFER;
}
if (msize == NULL)
return -3;
if (msize == NULL) {
return IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MSIZE;
}
if (*buf == NULL) {
*buf = malloc (IPC_HEADER_SIZE + m->length);
@ -78,82 +116,93 @@ int32_t ipc_message_format_write (const struct ipc_message *m, char **buf, ssize
printf ("sending msg: type %u, size %d, msize %ld\n", m->type, m->length, *msize);
#endif
return 0;
return IPC_ERROR_NONE;
}
// 1 on a recipient socket close
int32_t ipc_message_read (int32_t fd, struct ipc_message *m)
// IPC_ERROR_CLOSED_RECIPIENT on closed recipient
enum ipc_errors ipc_message_read (int32_t fd, struct ipc_message *m)
{
assert (m != NULL);
if (m == NULL) {
return IPC_ERROR_MESSAGE_READ__NO_MESSAGE_PARAM;
}
char *buf = NULL;
ssize_t msize = IPC_MAX_MESSAGE_SIZE;
int32_t ret = usock_recv (fd, &buf, &msize);
if (ret < 0) {
// on error, buffer already freed
enum ipc_errors ret = usock_recv (fd, &buf, &msize);
if (ret != IPC_ERROR_NONE && ret != IPC_ERROR_CLOSED_RECIPIENT) {
if (buf != NULL)
free (buf);
handle_err ("msg_read", "usock_recv");
return -1;
return ret;
}
// closed recipient, buffer already freed
if (ret == 1) {
return 1;
if (ret == IPC_ERROR_CLOSED_RECIPIENT) {
if (buf != NULL)
free (buf);
return IPC_ERROR_CLOSED_RECIPIENT;
}
if (ipc_message_format_read (m, buf, msize) < 0) {
return -1;
}
ret = ipc_message_format_read (m, buf, msize);
free (buf);
return 0;
return ret; // propagates ipc_message_format return
}
int32_t ipc_message_write (int32_t fd, const struct ipc_message *m)
enum ipc_errors ipc_message_write (int32_t fd, const struct ipc_message *m)
{
assert (m != NULL);
if (m == NULL) {
return IPC_ERROR_MESSAGE_WRITE__NO_MESSAGE_PARAM;
}
char *buf = NULL;
ssize_t msize = 0;
ipc_message_format_write (m, &buf, &msize);
ssize_t nbytes_sent = 0;
int32_t ret = usock_send (fd, buf, msize, &nbytes_sent);
if (ret < 0) {
if (buf != NULL) {
free (buf);
}
handle_err ("msg_write", "usock_send ret < 0");
return -1;
enum ipc_errors ret = usock_send (fd, buf, msize, &nbytes_sent);
if (buf != NULL) {
free (buf);
}
if (ret != IPC_ERROR_NONE) {
handle_err ("msg_write", "usock_send");
return ret;
}
// what was sent != what should have been sent
if (nbytes_sent != msize) {
if (buf != NULL) {
free (buf);
}
handle_err ("msg_write", "usock_send did not send enough data");
return -1;
return IPC_ERROR_MESSAGE_WRITE__NOT_ENOUGH_DATA;
}
if (buf != NULL) {
free (buf);
}
return 0;
return IPC_ERROR_NONE;
}
// MSG FORMAT
int32_t ipc_message_format (struct ipc_message *m, char type, const char *payload, ssize_t length)
enum ipc_errors ipc_message_format (struct ipc_message *m, char type, const char *payload, ssize_t length)
{
assert (m != NULL);
assert (length <= IPC_MAX_MESSAGE_SIZE);
assert ((length == 0 && payload == NULL) || (length > 0 && payload != NULL));
if (m == NULL) {
return IPC_ERROR_MESSAGE_FORMAT__NO_MESSAGE_PARAM;
}
if ((length == 0 && payload != NULL) || (length > 0 && payload == NULL)) {
return IPC_ERROR_MESSAGE_FORMAT__INCONSISTENT_PARAMS;
}
if (length > IPC_MAX_MESSAGE_SIZE) {
handle_err ("msg_format_con", "msgsize > BUFSIZ");
return -1;
printf ("msg to format: %ld B)\n", length);
return IPC_ERROR_MESSAGE_FORMAT__LENGTH;
}
m->type = type;
@ -174,25 +223,26 @@ int32_t ipc_message_format (struct ipc_message *m, char type, const char *payloa
if (payload != NULL) {
memcpy (m->payload, payload, length);
}
return 0;
return IPC_ERROR_NONE;
}
int32_t ipc_message_format_data (struct ipc_message *m, const char *payload, ssize_t length)
enum ipc_errors ipc_message_format_data (struct ipc_message *m, const char *payload, ssize_t length)
{
return ipc_message_format (m, MSG_TYPE_DATA, payload, length);
}
int32_t ipc_message_format_server_close (struct ipc_message *m)
enum ipc_errors ipc_message_format_server_close (struct ipc_message *m)
{
return ipc_message_format (m, MSG_TYPE_SERVER_CLOSE, NULL, 0);
}
int32_t ipc_message_empty (struct ipc_message *m)
enum ipc_errors ipc_message_empty (struct ipc_message *m)
{
assert (m != NULL);
if (m == NULL)
return -1;
if (m == NULL) {
return IPC_ERROR_MESSAGE_EMPTY__EMPTY_MESSAGE_LIST;
}
if (m->payload != NULL) {
free (m->payload);
@ -201,5 +251,5 @@ int32_t ipc_message_empty (struct ipc_message *m)
m->length = 0;
return 0;
return IPC_ERROR_NONE;
}

6
src/message.h
View File

@ -1,12 +1,6 @@
#ifndef __IPC_MSG_H__
#define __IPC_MSG_H__
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "ipc.h"
void ipc_message_print (const struct ipc_message *m);

194
src/usocket.c
View File

@ -1,6 +1,9 @@
#include "usocket.h"
#include "utils.h"
#include "error.h"
#include <time.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
@ -8,20 +11,23 @@
#include <unistd.h>
#include <assert.h>
int32_t usock_send (const int32_t fd, const char *buf, ssize_t len, ssize_t *sent)
#include "usocket.h"
#include "utils.h"
enum ipc_errors usock_send (const int32_t fd, const char *buf, ssize_t len, ssize_t *sent)
{
ssize_t ret = 0;
ret = send (fd, buf, len, MSG_NOSIGNAL);
if (ret <= 0) {
handle_err ("usock_send", "send ret <= 0");
return -1;
return IPC_ERROR_USOCK_SEND;
}
*sent = ret;
return 0;
return IPC_ERROR_NONE;
}
// *len is changed to the total message size read (header + payload)
int32_t usock_recv (const int32_t fd, char **buf, ssize_t *len)
enum ipc_errors usock_recv (const int32_t fd, char **buf, ssize_t *len)
{
assert(buf != NULL);
assert(len != NULL);
@ -30,12 +36,12 @@ int32_t usock_recv (const int32_t fd, char **buf, ssize_t *len)
if (buf == NULL) {
handle_err ("usock_recv", "buf == NULL");
return -1;
return IPC_ERROR_USOCK_RECV__NO_BUFFER;
}
if (len == NULL) {
handle_err ("usock_recv", "len == NULL");
return -1;
return IPC_ERROR_USOCK_RECV__NO_LENGTH;
}
if (*buf == NULL) {
@ -116,7 +122,7 @@ int32_t usock_recv (const int32_t fd, char **buf, ssize_t *len)
handle_err ("usock_recv", "unsupported error");
;
}
return -1;
return IPC_ERROR_USOCK_RECV;
}
#if defined(IPC_WITH_ERRORS) && IPC_WITH_ERRORS > 2
@ -132,27 +138,27 @@ int32_t usock_recv (const int32_t fd, char **buf, ssize_t *len)
free (*buf);
*buf = NULL;
}
return 1;
return IPC_ERROR_CLOSED_RECIPIENT;
}
// print_hexa ("msg recv", (uint8_t *)*buf, *len);
// fflush(stdout);
return 0;
return IPC_ERROR_NONE;
}
int32_t usock_connect (int32_t *fd, const char *path)
enum ipc_errors usock_connect (int32_t *fd, const char *path)
{
assert (fd != NULL);
assert (path != NULL);
if (fd == NULL) {
handle_err ("usock_connect", "fd == NULL");
return -1;
return IPC_ERROR_USOCK_CONNECT__WRONG_FILE_DESCRIPTOR;
}
if (path == NULL) {
handle_err ("usock_connect", "path == NULL");
return -1;
return IPC_ERROR_USOCK_CONNECT__EMPTY_PATH;
}
int32_t sfd;
@ -162,7 +168,7 @@ int32_t usock_connect (int32_t *fd, const char *path)
sfd = socket (AF_UNIX, SOCK_STREAM, 0);
if (sfd == -1) {
handle_err ("usock_connect", "sfd == -1");
return -1;
return IPC_ERROR_USOCK_CONNECT__SOCKET;
}
// clear structure
@ -180,22 +186,22 @@ int32_t usock_connect (int32_t *fd, const char *path)
*fd = sfd;
return 0;
return IPC_ERROR_NONE;
}
int32_t usock_init (int32_t *fd, const char *path)
enum ipc_errors usock_init (int32_t *fd, const char *path)
{
assert (fd != NULL);
assert (path != NULL);
if (fd == NULL) {
handle_err ("usock_init", "fd == NULL");
return -1;
return IPC_ERROR_USOCK_INIT__EMPTY_FILE_DESCRIPTOR;
}
if (path == NULL) {
handle_err ("usock_init", "path == NULL");
return -1;
return IPC_ERROR_USOCK_INIT__EMPTY_PATH;
}
int32_t sfd;
@ -205,7 +211,7 @@ int32_t usock_init (int32_t *fd, const char *path)
sfd = socket (AF_UNIX, SOCK_STREAM, 0);
if (sfd == -1) {
handle_err ("usock_init", "sfd == -1");
return -1;
return IPC_ERROR_USOCK_INIT__WRONG_FILE_DESCRIPTOR;
}
// clear structure
@ -214,35 +220,36 @@ int32_t usock_init (int32_t *fd, const char *path)
my_addr.sun_family = AF_UNIX;
strncpy(my_addr.sun_path, path, strlen (path));
// TODO FIXME
// delete the unix socket if already created
// delete the unix socket if already created
// ignore otherwise
usock_remove (path);
peer_addr_size = sizeof(struct sockaddr_un);
if (bind (sfd, (struct sockaddr *) &my_addr, peer_addr_size) == -1) {
handle_err ("usock_init", "bind == -1");
perror("bind");
return -1;
return IPC_ERROR_USOCK_INIT__BIND;
}
if (listen (sfd, LISTEN_BACKLOG) == -1) {
handle_err ("usock_init", "listen == -1");
perror("listen");
return -1;
return IPC_ERROR_USOCK_INIT__LISTEN;
}
*fd = sfd;
return 0;
return IPC_ERROR_NONE;
}
int32_t usock_accept (int32_t fd, int32_t *pfd)
enum ipc_errors usock_accept (int32_t fd, int32_t *pfd)
{
assert (pfd != NULL);
if (pfd == NULL) {
handle_err ("usock_accept", "pfd == NULL");
return -1;
return IPC_ERROR_USOCK_ACCEPT__PATH_FILE_DESCRIPTOR;
}
struct sockaddr_un peer_addr;
@ -253,13 +260,13 @@ int32_t usock_accept (int32_t fd, int32_t *pfd)
if (*pfd < 0) {
handle_err ("usock_accept", "accept < 0");
perror("listen");
return -1;
return IPC_ERROR_USOCK_ACCEPT;
}
return 0;
return IPC_ERROR_NONE;
}
int32_t usock_close (int32_t fd)
enum ipc_errors usock_close (int32_t fd)
{
int32_t ret = 0;
@ -267,116 +274,25 @@ int32_t usock_close (int32_t fd)
if (ret < 0) {
handle_err ("usock_close", "close ret < 0");
perror ("closing");
return -1;
return IPC_ERROR_USOCK_CLOSE;
}
return 0;
return IPC_ERROR_NONE;
}
int32_t usock_remove (const char *path)
enum ipc_errors usock_remove (const char *path)
{
return unlink (path);
}
// TODO: ipc_services functions
struct ipc_service * ipc_client_server_copy (const struct ipc_service *p)
{
if (p == NULL)
return NULL;
struct ipc_service * copy = malloc (sizeof(struct ipc_service));
memset (copy, 0, sizeof (struct ipc_service));
memcpy (copy, p, sizeof (struct ipc_service));
return copy;
}
int32_t ipc_client_server_eq (const struct ipc_service *p1, const struct ipc_service *p2)
{
return (p1->version == p2->version && p1->index == p2->index
&& p1->service_fd == p2->service_fd && memcmp(p1->spath, p1->spath, PATH_MAX) == 0 );
}
void ipc_client_server_gen (struct ipc_service *p
, uint32_t index, uint32_t version)
{
p->version = version;
p->index = index;
}
int32_t ipc_services_add (struct ipc_services *services, struct ipc_service *p)
{
assert(services != NULL);
assert(p != NULL);
services->size++;
services->services = realloc(services->services
, sizeof(struct ipc_service) * services->size);
if (services->services == NULL) {
return -1;
}
services->services[services->size - 1] = p;
return 0;
}
int32_t ipc_services_del (struct ipc_services *services, struct ipc_service *p)
{
assert(services != NULL);
assert(p != NULL);
if (services->services == NULL) {
return -1;
}
int32_t i;
for (i = 0; i < services->size; i++) {
if (services->services[i] == p) {
services->services[i] = services->services[services->size-1];
services->size--;
if (services->size == 0) {
ipc_services_free (services);
}
else {
services->services = realloc(services->services
, sizeof(struct ipc_service) * services->size);
if (services->services == NULL) {
return -2;
}
}
return 0;
}
}
return -3;
}
void service_print (struct ipc_service *p)
{
if (p != NULL)
printf ("client %d : index %d, version %d\n"
, p->service_fd, p->index, p->version);
}
void ipc_services_print (struct ipc_services *ap)
{
int32_t i;
for (i = 0; i < ap->size; i++) {
printf("%d : ", i);
service_print(ap->services[i]);
}
}
void ipc_services_free (struct ipc_services *ap)
{
if (ap->services != NULL) {
free (ap->services);
ap->services = NULL;
}
ap->size = 0;
struct stat file_state;
memset (&file_state, 0, sizeof (struct stat));
// if file exists, remove it
int ret = stat (path, &file_state);
if (ret == 0) {
ret = unlink (path);
if (ret != 0) {
return IPC_ERROR_USOCK_REMOVE__UNLINK;
}
return IPC_ERROR_NONE;
}
return IPC_ERROR_USOCK_REMOVE__NO_FILE;
}

26
src/usocket.h
View File

@ -1,22 +1,13 @@
#ifndef __IPC_USOCKET_H__
#define __IPC_USOCKET_H__
#include <time.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "ipc.h"
#include <stdint.h>
#define LISTEN_BACKLOG 128
/**
* for all functions: 0 ok, < 0 not ok
*/
// input: len = max buf size
// output: *sent = nb received bytes
int32_t usock_send (const int32_t fd, const char *buf, ssize_t len, ssize_t *sent);
enum ipc_errors usock_send (const int32_t fd, const char *buf, ssize_t len, ssize_t *sent);
// -1 on msize == NULL or buf == NULL
// -1 on unsupported errors from read(2)
@ -25,23 +16,20 @@ int32_t usock_send (const int32_t fd, const char *buf, ssize_t len, ssize_t *sen
// allocation of *len bytes on *buf == NULL
//
// output: *len = nb sent bytes
int32_t usock_recv (int32_t fd, char **buf, ssize_t *len);
enum ipc_errors usock_recv (int32_t fd, char **buf, ssize_t *len);
// -1 on close(2) < 0
int32_t usock_close (int32_t fd);
enum ipc_errors usock_close (int32_t fd);
// same as connect(2)
// -1 on fd == NULL
int32_t usock_connect (int32_t *fd, const char *path);
enum ipc_errors usock_connect (int32_t *fd, const char *path);
int32_t usock_init (int32_t *fd, const char *path);
enum ipc_errors usock_init (int32_t *fd, const char *path);
int32_t usock_accept (int32_t fd, int32_t *pfd);
enum ipc_errors usock_accept (int32_t fd, int32_t *pfd);
// same as unlink(2)
int32_t usock_remove (const char *path);
void ipc_services_print (struct ipc_services *);
void service_print (struct ipc_service *);
enum ipc_errors usock_remove (const char *path);
#endif