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libipc-old
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libipc version 0.2

more_to_read
Philippe PITTOLI 2019-07-27 15:46:04 +02:00
parent b9054b557e
commit b528040d11
12 changed files with 1147 additions and 898 deletions
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53
Makefile
View File

@ -11,7 +11,7 @@ MANDIR := $(SHAREDIR)/man
CC := cc
AR := ar
RANLIB := ranlib
CFLAGS := -g
CFLAGS := -Wall -Wextra -g
LDFLAGS :=
Q := @
@ -27,7 +27,7 @@ libipc.clean: libipc.so.clean libipc.a.clean
libipc.uninstall: libipc.so.uninstall libipc.a.uninstall
src/ipc.h.install: src/ipc.h
src/ipc.h.install: src/ipc.h src
@echo ' IN > $(INCLUDEDIR)/ipc.h'
$(Q)mkdir -p '$(DESTDIR)$(INCLUDEDIR)'
$(Q)install -m0644 src/ipc.h $(DESTDIR)$(INCLUDEDIR)/ipc.h
@ -39,7 +39,7 @@ src/ipc.h.uninstall:
@echo ' RM > $(INCLUDEDIR)/ipc.h'
$(Q)rm -f '$(DESTDIR)$(INCLUDEDIR)/ipc.h'
man/libipc.7: man/libipc.7.md
man/libipc.7: man/libipc.7.md man
@echo ' MAN > man/libipc.7'
$(Q)pandoc -s --from markdown --to man 'man/libipc.7.md' -o 'man/libipc.7'
@ -57,9 +57,9 @@ man/libipc.7.uninstall:
@echo ' RM > $(MANDIR)/man7/libipc.7'
$(Q)rm -f '$(DESTDIR)$(MANDIR)/man7/libipc.7'
libipc.so: src/communication.o src/error.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/network.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
$(Q)$(CC) -o libipc.so -shared $(LDFLAGS) src/communication.o src/error.o src/logger.o src/message.o src/network.o src/usocket.o src/utils.o
libipc.so.install: libipc.so
@echo ' IN > $(LIBDIR)/libipc.so.0.1.0'
@ -86,9 +86,9 @@ libipc.so.uninstall:
@echo ' RM > $(LIBDIR)/libipc.so'
$(Q)rm -f '$(DESTDIR)$(LIBDIR)/libipc.so'
libipc.a: src/communication.o src/error.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/network.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
$(Q)$(AR) rc 'libipc.a' src/communication.o src/error.o src/logger.o src/message.o src/network.o src/usocket.o src/utils.o
libipc.a.install: libipc.a
@echo ' IN > $(LIBDIR)/libipc.a'
@ -105,7 +105,7 @@ libipc.a.uninstall:
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
$(Q)$(CC) $(CFLAGS) -fPIC -std=c11 -c src/communication.c -fPIC -std=c11 -o src/communication.o
src/communication.o.install:
@ -117,7 +117,7 @@ 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
$(Q)$(CC) $(CFLAGS) -fPIC -std=c11 -c src/error.c -fPIC -std=c11 -o src/error.o
src/error.o.install:
@ -129,7 +129,7 @@ src/error.o.uninstall:
src/logger.o: src/logger.c src/logger.h
@echo ' CC > src/logger.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/logger.c -fPIC -o src/logger.o
$(Q)$(CC) $(CFLAGS) -fPIC -std=c11 -c src/logger.c -fPIC -std=c11 -o src/logger.o
src/logger.o.install:
@ -141,7 +141,7 @@ src/logger.o.uninstall:
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
$(Q)$(CC) $(CFLAGS) -fPIC -std=c11 -c src/message.c -fPIC -std=c11 -o src/message.o
src/message.o.install:
@ -151,9 +151,21 @@ src/message.o.clean:
src/message.o.uninstall:
src/network.o: src/network.c src/ipc.h
@echo ' CC > src/network.o'
$(Q)$(CC) $(CFLAGS) -fPIC -std=c11 -c src/network.c -fPIC -std=c11 -o src/network.o
src/network.o.install:
src/network.o.clean:
@echo ' RM > src/network.o'
$(Q)rm -f src/network.o
src/network.o.uninstall:
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
$(Q)$(CC) $(CFLAGS) -fPIC -std=c11 -c src/usocket.c -fPIC -std=c11 -o src/usocket.o
src/usocket.o.install:
@ -163,9 +175,9 @@ src/usocket.o.clean:
src/usocket.o.uninstall:
src/utils.o: src/utils.c src/utils.h
src/utils.o: src/utils.c src/utils.h src/ipc.h
@echo ' CC > src/utils.o'
$(Q)$(CC) $(CFLAGS) -fPIC -c src/utils.c -fPIC -o src/utils.o
$(Q)$(CC) $(CFLAGS) -fPIC -std=c11 -c src/utils.c -fPIC -std=c11 -o src/utils.o
src/utils.o.install:
@ -175,6 +187,10 @@ src/utils.o.clean:
src/utils.o.uninstall:
src:
$(Q)mkdir -p src
man:
$(Q)mkdir -p man
$(DESTDIR)$(PREFIX):
@echo ' DIR > $(PREFIX)'
$(Q)mkdir -p $(DESTDIR)$(PREFIX)
@ -193,12 +209,12 @@ $(DESTDIR)$(INCLUDEDIR):
$(DESTDIR)$(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/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
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/network.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/network.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/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
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/network.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/network.o.uninstall src/usocket.o.uninstall src/utils.o.uninstall
@:
subdirs.uninstall:
@ -208,7 +224,7 @@ 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/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
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/network.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/network.o.clean src/usocket.o.clean src/utils.o.clean
distclean: clean
@ -231,6 +247,7 @@ $(PACKAGE)-$(VERSION).tar.gz: distdir
$(PACKAGE)-$(VERSION)/src/error.c \
$(PACKAGE)-$(VERSION)/src/logger.c \
$(PACKAGE)-$(VERSION)/src/message.c \
$(PACKAGE)-$(VERSION)/src/network.c \
$(PACKAGE)-$(VERSION)/src/usocket.c \
$(PACKAGE)-$(VERSION)/src/utils.c \
$(PACKAGE)-$(VERSION)/src/logger.h \
@ -250,6 +267,7 @@ $(PACKAGE)-$(VERSION).tar.xz: distdir
$(PACKAGE)-$(VERSION)/src/error.c \
$(PACKAGE)-$(VERSION)/src/logger.c \
$(PACKAGE)-$(VERSION)/src/message.c \
$(PACKAGE)-$(VERSION)/src/network.c \
$(PACKAGE)-$(VERSION)/src/usocket.c \
$(PACKAGE)-$(VERSION)/src/utils.c \
$(PACKAGE)-$(VERSION)/src/logger.h \
@ -269,6 +287,7 @@ $(PACKAGE)-$(VERSION).tar.bz2: distdir
$(PACKAGE)-$(VERSION)/src/error.c \
$(PACKAGE)-$(VERSION)/src/logger.c \
$(PACKAGE)-$(VERSION)/src/message.c \
$(PACKAGE)-$(VERSION)/src/network.c \
$(PACKAGE)-$(VERSION)/src/usocket.c \
$(PACKAGE)-$(VERSION)/src/utils.c \
$(PACKAGE)-$(VERSION)/src/logger.h \

3
project.zsh
View File

@ -2,10 +2,13 @@
package=ipc
version=0.1.0
CFLAGS="-Wall -Wextra -g"
targets=(libipc src/ipc.h man/libipc.7)
type[libipc]=library
sources[libipc]="$(ls src/*.c)"
cflags[libipc]="-std=c11"
type[src/ipc.h]=header

567
src/communication.c
View File

@ -1,26 +1,26 @@
#include "ipc.h"
#include "utils.h"
#include <sys/select.h>
#include <unistd.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h> // error numbers
#include <stdlib.h>
#include <string.h>
#include "ipc.h"
#include "utils.h"
// FOR THE PURPOSE OF SOME EXPERIMENT
#include <sys/types.h>
#include <sys/socket.h>
// print structures
#include "message.h"
#define IPC_CONNECTION_TYPE_IPC 'i'
#define IPC_CONNECTION_TYPE_EXTERNAL 'a'
void service_path (char *path, const char *sname, int32_t index, int32_t version)
enum ipc_errors service_path (char *path, const char *sname, int32_t index, int32_t version)
{
assert (path != NULL);
assert (sname != NULL);
T_R ((path == NULL), IPC_ERROR_SERVICE_PATH__NO_PATH);
T_R ((sname == NULL), IPC_ERROR_SERVICE_PATH__NO_SERVICE_NAME);
memset (path, 0, PATH_MAX);
@ -29,12 +29,13 @@ void service_path (char *path, const char *sname, int32_t index, int32_t version
rundir = RUNDIR;
snprintf (path, PATH_MAX-1, "%s/%s-%d-%d", rundir, sname, index, version);
return IPC_ERROR_NONE;
}
/*calculer le max filedescriptor*/
static int32_t get_max_fd (struct ipc_connection_infos *cinfos)
{
int32_t i;
size_t i;
int32_t max = 0;
for (i = 0; i < cinfos->size; i++ ) {
@ -48,25 +49,26 @@ static int32_t get_max_fd (struct ipc_connection_infos *cinfos)
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;
T_R ((env == NULL), IPC_ERROR_SERVER_INIT__NO_ENVIRONMENT_PARAM);
T_R ((srv == NULL), IPC_ERROR_SERVER_INIT__NO_SERVICE_PARAM);
T_R ((sname == NULL), IPC_ERROR_SERVER_INIT__NO_SERVER_NAME_PARAM);
if (srv == NULL)
return IPC_ERROR_SERVER_INIT__NO_SERVICE_PARAM;
if (sname == NULL)
return IPC_ERROR_SERVER_INIT__NO_SERVER_NAME_PARAM;
#if 0
// For server init, no need for networkd evaluation
// 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;
for (size_t i = 0 ; env[i] != NULL ; i++) {
// TODO: check for every IPC_NETWORK_* environment variable
}
#endif
// gets the service path
char buf [PATH_MAX];
memset (buf, 0, PATH_MAX);
service_path (buf, sname, srv->index, srv->version);
SECURE_BUFFER_DECLARATION (char, buf, PATH_MAX);
TIPC_P_RR (service_path (buf, sname, srv->index, srv->version), "cannot get server path");
// gets the service path
if (srv->spath != NULL) {
@ -75,52 +77,91 @@ enum ipc_errors ipc_server_init (char **env, struct ipc_connection_info *srv, co
}
size_t s = strlen (buf);
srv->spath = malloc (s+1);
if (srv->spath == NULL) {
return IPC_ERROR_SERVER_INIT__MALLOC;
}
SECURE_BUFFER_HEAP_ALLOCATION_R (srv->spath, s+1, , IPC_ERROR_SERVER_INIT__MALLOC);
memcpy (srv->spath, buf, s);
srv->spath[s] = '\0'; // to be sure
enum ipc_errors ret = usock_init (&srv->fd, srv->spath);
if (ret != IPC_ERROR_NONE) {
handle_err ("ipc_server_init", "usock_init");
return ret;
}
TIPC_F_RR (usock_init (&srv->fd, srv->spath), ("cannot init server %s", srv->spath) );
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_connection (char **env, struct ipc_connection_info *srv, const char *sname)
enum ipc_errors ipc_write_fd (int fd, const struct ipc_message *m);
// when networkd is not working properly (or do not retrieve the service): srv->fd = 0
enum ipc_errors ipc_contact_networkd (struct ipc_connection_info *srv, const char *sname)
{
// TODO: loop over environment variables
// any IPC_NETWORK_* should be shared with the network service
T_R ((srv == NULL), IPC_ERROR_CONTACT_NETWORKD__NO_SERVER_PARAM);
T_R ((sname == NULL), IPC_ERROR_CONTACT_NETWORKD__NO_SERVICE_NAME_PARAM);
char *networkvar = getenv("IPC_NETWORK");
if (networkvar == NULL) {
srv->fd = 0;
return IPC_ERROR_NONE;
}
// TODO: is there another, more interesting way to do this?
// currently, IPC_NETWORK is 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;
// ex: IPC_NETWORK="audio tor://some.example.com/audio ;pong tls://pong.example.com/pong"
assert (srv != NULL);
assert (sname != NULL);
// printf ("IPC_NETWORK: %s\n", networkvar);
if (srv == NULL) {
return IPC_ERROR_CONNECTION__NO_SERVER;
}
if (sname == NULL) {
return IPC_ERROR_CONNECTION__NO_SERVICE_NAME;
SECURE_BUFFER_DECLARATION (char, columnthensname, BUFSIZ);
columnthensname[0] = ';';
memcpy (columnthensname +1, sname, strlen(sname));
if (strncmp (networkvar, sname, strlen(sname)) != 0 && strstr (networkvar, columnthensname) == NULL) {
// printf ("sname %s not found\n", sname);
srv->fd = 0;
return IPC_ERROR_NONE;
}
// printf ("(;)sname %s found\n", sname);
// gets the service path
char buf [PATH_MAX];
memset (buf, 0, PATH_MAX);
service_path (buf, sname, srv->index, srv->version);
SECURE_BUFFER_DECLARATION (char, buf, PATH_MAX);
TIPC_P_RR (service_path (buf, "network", 0, 0), "cannot get network service path");
int networkdfd = 0;
TIPC_F_R (usock_connect (&networkdfd, buf), ("cannot initiates a connection [%s]", buf)
, IPC_ERROR_CONTACT_NETWORKD__NETWORKD);
SECURE_DECLARATION (struct ipc_message, msg);
msg.type = MSG_TYPE_NETWORK_LOOKUP;
msg.user_type = MSG_TYPE_NETWORK_LOOKUP;
SECURE_BUFFER_DECLARATION (char, content, BUFSIZ);
snprintf (content, BUFSIZ, "%s;%s", sname, networkvar);
msg.length = strlen (content);
msg.payload = content;
TIPC_P_RR (ipc_write_fd (networkdfd, &msg), "cannot send a message to networkd");
enum ipc_errors ret = ipc_receive_fd (networkdfd, &srv->fd);
if (ret == IPC_ERROR_NONE) {
usock_close (networkdfd);
}
enum ipc_errors ret = usock_connect (&srv->fd, buf);
if (ret != IPC_ERROR_NONE) {
handle_err ("ipc_connection", "usock_connect ret");
return ret;
}
enum ipc_errors ipc_connection (char **env, struct ipc_connection_info *srv, const char *sname)
{
T_R ((env == NULL), IPC_ERROR_CONNECTION__NO_ENVIRONMENT_PARAM);
T_R ((srv == NULL), IPC_ERROR_CONNECTION__NO_SERVER);
T_R ((sname == NULL), IPC_ERROR_CONNECTION__NO_SERVICE_NAME);
TIPC_P (ipc_contact_networkd (srv, sname), "error during networkd connection");
// if networkd did not initiate the connection
if (srv->fd <= 0) {
// gets the service path
SECURE_BUFFER_DECLARATION (char, buf, PATH_MAX);
TIPC_P_RR (service_path (buf, sname, srv->index, srv->version), "cannot get server path");
TIPC_F_RR (usock_connect (&srv->fd, buf), ("cannot initiates a connection [%s]", buf));
}
return IPC_ERROR_NONE;
@ -144,86 +185,210 @@ 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)
{
assert (srv != NULL);
assert (p != NULL);
if (srv == NULL) {
return IPC_ERROR_ACCEPT__NO_SERVICE_PARAM;
}
if (p == NULL) {
return IPC_ERROR_ACCEPT__NO_CLIENT_PARAM;
}
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;
}
T_R ((srv == NULL), IPC_ERROR_ACCEPT__NO_SERVICE_PARAM);
T_R ((p == NULL), IPC_ERROR_ACCEPT__NO_CLIENT_PARAM);
TIPC_P_R (usock_accept (srv->fd, &p->fd), "cannot accept fd", IPC_ERROR_ACCEPT);
p->type = IPC_CONNECTION_TYPE_IPC;
return IPC_ERROR_NONE;
}
// receive then format in an ipc_message structure
enum ipc_errors ipc_read (const struct ipc_connection_info *p, struct ipc_message *m)
{
return ipc_message_read (p->fd, m);
T_R ((m == NULL), IPC_ERROR_READ__NO_MESSAGE_PARAM);
char *buf = NULL;
size_t msize = IPC_MAX_MESSAGE_SIZE;
// on error or closed recipient, the buffer already freed
TIPC_NP_RR (usock_recv (p->fd, &buf, &msize));
TIPC_I_RR (ipc_message_format_read (m, buf, msize), if (buf != NULL) free (buf));
free (buf);
return IPC_ERROR_NONE; // propagates ipc_message_format return
}
enum ipc_errors ipc_write_fd (int fd, const struct ipc_message *m)
{
T_R ((m == NULL), IPC_ERROR_WRITE__NO_MESSAGE_PARAM);
char *buf = NULL;
size_t msize = 0;
ipc_message_format_write (m, &buf, &msize);
size_t nbytes_sent = 0;
TIPC_I_RR (usock_send (fd, buf, msize, &nbytes_sent), if (buf != NULL) free (buf));
if (buf != NULL) {
free (buf);
}
// what was sent != what should have been sent
T_R ((nbytes_sent != msize), IPC_ERROR_WRITE__NOT_ENOUGH_DATA);
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_write (const struct ipc_connection_info *p, const struct ipc_message *m)
{
return ipc_message_write (p->fd, m);
return ipc_write_fd (p->fd, m);
}
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;
}
T_R ((cinfo == NULL), IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFO_PARAM);
T_R ((cinfos == NULL), IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFOS_PARAM);
if (cinfos == NULL) {
return IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFOS_PARAM;
}
SECURE_BUFFER_HEAP_ALLOCATION_R (*new_client, sizeof(struct ipc_connection_info), , IPC_ERROR_HANDLE_NEW_CONNECTION__MALLOC);
*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) {
return ret;
}
ret = ipc_add (cinfos, *new_client);
if (ret != IPC_ERROR_NONE) {
return ret;
}
TIPC_P_RR (ipc_accept (cinfo, *new_client), "cannot accept the client during handle_new_connection");
TIPC_P_RR (ipc_add (cinfos, *new_client), "cannot add the new accepted client");
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_wait_event (struct ipc_connection_infos *cinfos
, struct ipc_connection_info *cinfo // NULL for clients
, struct ipc_event *event)
// new connection from a client
enum ipc_errors handle_connection (struct ipc_event *event, struct ipc_connection_infos *cinfos, struct ipc_connection_info *cinfo)
{
assert (cinfos != NULL);
// connection
struct ipc_connection_info *new_client = NULL;
if (cinfos == NULL) {
return IPC_ERROR_WAIT_EVENT__NO_CLIENTS_PARAM;
TIPC_P_RR (handle_new_connection (cinfo, cinfos, &new_client), "cannot add new client");
IPC_EVENT_SET (event, IPC_EVENT_TYPE_CONNECTION, NULL, new_client);
return IPC_ERROR_NONE;
}
// new message
enum ipc_errors handle_message (struct ipc_event *event
, struct ipc_connection_infos *cinfos
, struct ipc_connection_info *pc
, struct ipc_switchings *switchdb)
{
// if the socket is associated to another one for networkd
// read and write automatically and provide a new IPC_EVENT_TYPE indicating the switch
if (switchdb != NULL) {
int talkingfd = pc->fd;
int correspondingfd = ipc_switching_get (switchdb, talkingfd);
if (correspondingfd != -1) {
char *buf = NULL;
size_t msize = 0;
TIPC_T_P_I_R (
/* function to test */ usock_recv (talkingfd, &buf, &msize)
, /* error condition */ ret != IPC_ERROR_NONE && ret != IPC_ERROR_CLOSED_RECIPIENT
, /* to say on error */ "error while receiving message from client"
, /* to do on error */ if (buf != NULL) free (buf) ;
IPC_EVENT_SET (event, IPC_EVENT_TYPE_ERROR, NULL, pc)
, /* return function */ return (ret));
/** TODO: there is a message, send it to the corresponding fd **/
if (msize > 0) {
size_t nbytes_sent = 0;
TIPC_I_RR (usock_send (correspondingfd, buf, msize, &nbytes_sent), if (buf != NULL) free (buf));
if (nbytes_sent != msize) {
LOG_ERROR ("wrote not enough data from %d to fd %d", talkingfd, correspondingfd);
IPC_EVENT_SET (event, IPC_EVENT_TYPE_ERROR, NULL, pc);
return IPC_ERROR_NONE; // FIXME: return something else, maybe?
}
if (event == NULL) {
return IPC_ERROR_WAIT_EVENT__NO_EVENT_PARAM;
LOG_DEBUG ("received a message on fd %d => switch to fd %d", talkingfd, correspondingfd);
if (buf != NULL)
free (buf);
// everything is OK: inform networkd of a successful transfer
IPC_EVENT_SET (event, IPC_EVENT_TYPE_SWITCH, NULL, pc);
return IPC_ERROR_NONE;
}
else if (msize == 0) {
int delfd;
delfd = ipc_switching_del (switchdb, talkingfd);
if (delfd >= 0) {
close (delfd);
ipc_del_fd (cinfos, delfd);
}
close (talkingfd);
ipc_del_fd (cinfos, talkingfd);
if (delfd >= 0) {
LOG_DEBUG ("disconnection of %d (and related fd %d)", talkingfd, delfd);
}
else {
LOG_DEBUG ("disconnection of %d", talkingfd);
}
IPC_EVENT_SET(event, IPC_EVENT_TYPE_DISCONNECTION, NULL, pc);
return IPC_ERROR_CLOSED_RECIPIENT;
}
}
}
// no treatment of the socket if external socket
if (pc->type == IPC_CONNECTION_TYPE_EXTERNAL) {
IPC_EVENT_SET (event, IPC_EVENT_TYPE_EXTRA_SOCKET, NULL, pc);
return IPC_ERROR_NONE;
}
// listen to what they have to say (disconnection or message)
// then add a client to `event`, the ipc_event structure
enum ipc_errors ret;
struct ipc_message *m = NULL;
SECURE_BUFFER_HEAP_ALLOCATION_R (m, sizeof(struct ipc_message), , IPC_ERROR_NOT_ENOUGH_MEMORY);
// current talking client
ret = ipc_read (pc, m);
if (ret != IPC_ERROR_NONE && ret != IPC_ERROR_CLOSED_RECIPIENT) {
enum ipc_errors rvalue = ret; // store the final return value
ipc_message_empty (m);
free (m);
// if there is a problem, just remove the client
TIPC_P (ipc_close (pc), "cannot close a connection in handle_message");
TIPC_P (ipc_del (cinfos, pc), "cannot delete a connection in handle_message");
IPC_EVENT_SET(event, IPC_EVENT_TYPE_ERROR, NULL, pc);
return rvalue;
}
// disconnection: close the client then delete it from cinfos
if (ret == IPC_ERROR_CLOSED_RECIPIENT) {
TIPC_P (ipc_close (pc), "cannot close a connection on closed recipient in handle_message");
TIPC_P (ipc_del (cinfos, pc), "cannot delete a connection on closed recipient in handle_message");
ipc_message_empty (m);
free (m);
IPC_EVENT_SET(event, IPC_EVENT_TYPE_DISCONNECTION, NULL, pc);
// warning: do not forget to free the ipc_client structure
return IPC_ERROR_NONE;
}
IPC_EVENT_SET (event, IPC_EVENT_TYPE_MESSAGE, m, pc);
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_wait_event_networkd (struct ipc_connection_infos *cinfos
, struct ipc_connection_info *cinfo // NULL for clients
, struct ipc_event *event
, struct ipc_switchings *switchdb)
{
T_R ((cinfos == NULL), IPC_ERROR_WAIT_EVENT__NO_CLIENTS_PARAM);
T_R ((event == NULL), IPC_ERROR_WAIT_EVENT__NO_EVENT_PARAM);
IPC_EVENT_CLEAN(event);
int32_t i, j;
size_t i, j;
/* master file descriptor list */
fd_set master;
fd_set readf;
@ -254,89 +419,16 @@ enum ipc_errors ipc_wait_event (struct ipc_connection_infos *cinfos
}
readf = master;
if(select(fdmax+1, &readf, NULL, NULL, NULL) == -1) {
perror("select");
return IPC_ERROR_WAIT_EVENT__SELECT;
}
T_PERROR_R ((select(fdmax+1, &readf, NULL, NULL, NULL) == -1), "select", IPC_ERROR_WAIT_EVENT__SELECT);
for (i = 0; i <= fdmax; i++) {
for (i = 0; i <= (size_t) fdmax; i++) {
if (FD_ISSET(i, &readf)) {
if (cinfo != NULL && i == listener) {
// connection
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 IPC_ERROR_NONE;
if (cinfo != NULL && i == (size_t) listener) {
return handle_connection (event, cinfos, cinfo);
} else {
for(j = 0; j < cinfos->size; j++) {
if(i == cinfos->cinfos[j]->fd ) {
struct ipc_connection_info *pc = cinfos->cinfos[j];
// no treatment of the socket if external socket
if (pc->type == IPC_CONNECTION_TYPE_EXTERNAL) {
IPC_EVENT_SET (event, IPC_EVENT_TYPE_EXTRA_SOCKET, NULL, pc);
return IPC_ERROR_NONE;
}
// listen to what they have to say (disconnection or message)
// then add a client to `event`, the ipc_event structure
enum ipc_errors ret;
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
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);
// if there is a problem, just remove the client
ret = ipc_close (pc);
if (ret != IPC_ERROR_NONE) {
handle_err( "ipc_wait_event", "ipc_close");
}
ret = ipc_del (cinfos, pc);
if (ret != IPC_ERROR_NONE) {
handle_err( "ipc_wait_event", "ipc_del");
}
IPC_EVENT_SET(event, IPC_EVENT_TYPE_ERROR, NULL, pc);
return ret;
}
// 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");
}
ret = ipc_del (cinfos, pc);
if (ret != IPC_ERROR_NONE) {
handle_err( "ipc_wait_event", "ipc_del");
}
ipc_message_empty (m);
free (m);
IPC_EVENT_SET(event, IPC_EVENT_TYPE_DISCONNECTION, NULL, pc);
// warning: do not forget to free the ipc_client structure
return IPC_ERROR_NONE;
}
IPC_EVENT_SET (event, IPC_EVENT_TYPE_MESSAGE, m, pc);
return IPC_ERROR_NONE;
if(i == (size_t) cinfos->cinfos[j]->fd ) {
return handle_message (event, cinfos, cinfos->cinfos[j], switchdb);
}
}
}
@ -346,33 +438,29 @@ enum ipc_errors ipc_wait_event (struct ipc_connection_infos *cinfos
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_wait_event (struct ipc_connection_infos *cinfos
, struct ipc_connection_info *cinfo // NULL for clients
, struct ipc_event *event)
{
return ipc_wait_event_networkd (cinfos, cinfo, event, NULL);
}
// store and remove only pointers on allocated structures
enum ipc_errors ipc_add (struct ipc_connection_infos *cinfos, struct ipc_connection_info *p)
{
assert(cinfos != NULL);
assert(p != NULL);
if (cinfos == NULL) {
return IPC_ERROR_ADD__NO_PARAM_CLIENTS;
}
if (p == NULL) {
return IPC_ERROR_ADD__NO_PARAM_CLIENT;
}
T_R ((cinfos == NULL), IPC_ERROR_ADD__NO_PARAM_CLIENTS);
T_R ((p == NULL), IPC_ERROR_ADD__NO_PARAM_CLIENT);
cinfos->size++;
if (cinfos->size == 1 && cinfos->cinfos == NULL) {
// first allocation
cinfos->cinfos = malloc (sizeof(struct ipc_connection_info));
SECURE_BUFFER_HEAP_ALLOCATION_R (cinfos->cinfos, sizeof(struct ipc_connection_info), , IPC_ERROR_ADD__MALLOC);
}
else {
cinfos->cinfos = realloc(cinfos->cinfos, sizeof(struct ipc_connection_info) * cinfos->size);
}
if (cinfos->cinfos == NULL) {
return IPC_ERROR_ADD__EMPTY_LIST;
}
T_R ((cinfos->cinfos == NULL), IPC_ERROR_ADD__EMPTY_LIST);
cinfos->cinfos[cinfos->size - 1] = p;
return IPC_ERROR_NONE;
@ -380,22 +468,11 @@ enum ipc_errors ipc_add (struct ipc_connection_infos *cinfos, struct ipc_connect
enum ipc_errors ipc_del (struct ipc_connection_infos *cinfos, struct ipc_connection_info *p)
{
assert(cinfos != NULL);
assert(p != NULL);
T_R ((cinfos == NULL), IPC_ERROR_DEL__NO_CLIENTS_PARAM);
T_R ((p == NULL), IPC_ERROR_DEL__NO_CLIENT_PARAM);
T_R ((cinfos->cinfos == NULL), IPC_ERROR_DEL__EMPTY_LIST);
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;
size_t i;
for (i = 0; i < cinfos->size; i++) {
if (cinfos->cinfos[i] == p) {
// TODO: possible memory leak if the ipc_connection_info is not free'ed
@ -419,6 +496,19 @@ enum ipc_errors ipc_del (struct ipc_connection_infos *cinfos, struct ipc_connect
return IPC_ERROR_DEL__CANNOT_FIND_CLIENT;
}
void ipc_connections_close (struct ipc_connection_infos *cinfos)
{
if (cinfos->cinfos != NULL) {
for (size_t i = 0; i < cinfos->size ; i++) {
ipc_close (cinfos->cinfos[i]);
free (cinfos->cinfos[i]);
}
free (cinfos->cinfos);
cinfos->cinfos = NULL;
}
cinfos->size = 0;
}
void ipc_connections_free (struct ipc_connection_infos *cinfos)
{
if (cinfos->cinfos != NULL) {
@ -433,15 +523,11 @@ void ipc_connections_free (struct ipc_connection_infos *cinfos)
struct ipc_connection_info * ipc_connection_copy (const struct ipc_connection_info *p)
{
if (p == NULL)
return NULL;
T_R ((p == NULL), NULL);
struct ipc_connection_info * copy = malloc (sizeof(struct ipc_connection_info));
struct ipc_connection_info * copy = NULL;
if (copy == NULL)
return NULL;
memset (copy, 0, sizeof (struct ipc_connection_info));
SECURE_BUFFER_HEAP_ALLOCATION_R (copy, sizeof(struct ipc_connection_info), , NULL);
memcpy (copy, p, sizeof (struct ipc_connection_info));
return copy;
@ -456,9 +542,7 @@ int8_t ipc_connection_eq (const struct ipc_connection_info *p1, const struct ipc
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;
}
T_R ((cinfo == NULL), IPC_ERROR_CONNECTION_GEN__NO_CINFO);
cinfo->type = type;
cinfo->version = version;
@ -471,19 +555,12 @@ enum ipc_errors ipc_connection_gen (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)
{
if (cinfos == NULL) {
return IPC_ERROR_ADD_FD__NO_PARAM_CINFOS;
}
T_R ((cinfos == NULL), IPC_ERROR_ADD_FD__NO_PARAM_CINFOS);
struct ipc_connection_info *cinfo = NULL;
cinfo = malloc (sizeof(struct ipc_connection_info));
if (cinfo == NULL) {
return IPC_ERROR_NOT_ENOUGH_MEMORY;
}
memset (cinfo, 0, sizeof(struct ipc_connection_info));
SECURE_BUFFER_HEAP_ALLOCATION_R (cinfo, sizeof(struct ipc_connection_info), , IPC_ERROR_NOT_ENOUGH_MEMORY);
enum ipc_errors ret;
ipc_connection_gen (cinfo, 0, 0, fd, IPC_CONNECTION_TYPE_EXTERNAL);
return ipc_add (cinfos, cinfo);
@ -492,16 +569,10 @@ enum ipc_errors ipc_add_fd (struct ipc_connection_infos *cinfos, int fd)
// remove a connection from its file descriptor
enum ipc_errors ipc_del_fd (struct ipc_connection_infos *cinfos, int fd)
{
assert(cinfos != NULL);
if (cinfos == NULL) {
return IPC_ERROR_DEL_FD__NO_PARAM_CINFOS;
}
T_R ((cinfos == NULL), IPC_ERROR_DEL_FD__NO_PARAM_CINFOS);
T_R ((cinfos->cinfos == NULL), IPC_ERROR_DEL_FD__EMPTY_LIST);
if (cinfos->cinfos == NULL) {
return IPC_ERROR_DEL_FD__EMPTY_LIST;
}
int32_t i;
size_t i;
for (i = 0; i < cinfos->size; i++) {
if (cinfos->cinfos[i]->fd == fd) {
free (cinfos->cinfos[i]);
@ -528,26 +599,16 @@ enum ipc_errors ipc_del_fd (struct ipc_connection_infos *cinfos, int fd)
void ipc_connection_print (struct ipc_connection_info *cinfo)
{
if (cinfo == NULL) {
return;
}
T_R ((cinfo == NULL), );
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");
}
LOG_DEBUG ("fd %d: index %d, version %d, type %c, path %s"
, cinfo->fd, cinfo->index, cinfo->version, cinfo->type
, (cinfo->spath == NULL) ? "-" : cinfo->spath);
}
void ipc_connections_print (struct ipc_connection_infos *cinfos)
{
int32_t i;
for (i = 0; i < cinfos->size; i++) {
printf("[%d] : ", i);
for (size_t i = 0; i < cinfos->size; i++) {
ipc_connection_print(cinfos->cinfos[i]);
}
}

145
src/error.c
View File

@ -10,102 +10,113 @@ struct ipc_errors_verbose {
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_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_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_USOCK_CONNECT__CONNECT, "ipc_connection: error on the connect 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_USOCK_CONNECT__CONNECT, "ipc_connection: error on the connect function" }
, IPC_ERROR_CONNECTION_GEN__NO_CINFO, "ipc_connection_gen: no cinfo"
, { 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_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_RECEIVE_FD__RECVMSG, "ipc_receive_fd: recvmsg function" }
, { IPC_ERROR_RECEIVE_FD__NO_PARAM_FD, "ipc_receive_fd: no fd param" }
, { IPC_ERROR_PROVIDE_FD__SENDMSG, "ipc_provide_fd: sendmsg function" }
, 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_WRITE__NO_MESSAGE_PARAM, "ipc_write: no message param" }
, { IPC_ERROR_WRITE__NOT_ENOUGH_DATA, "ipc_write: no enough data sent" }
, { IPC_ERROR_READ__NO_MESSAGE_PARAM, "ipc_read: no message param" }
, IPC_ERROR_HANDLE_NEW_CONNECTION__MALLOC, "ipc_handle_new_connection: error on malloc 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_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_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_ADD_FD__NO_PARAM_CINFOS, "ipc_add_fd: no cinfos param"
, IPC_ERROR_ADD_FD__EMPTY_LIST, "ipc_add_fd: empty list after realloc (memory problem)"
, { IPC_ERROR_CONTACT_NETWORKD__NO_SERVICE_NAME_PARAM, "ipc_contact_networkd: no service name param"}
, { IPC_ERROR_CONTACT_NETWORKD__NO_SERVER_PARAM, "ipc_contact_networkd: no server param"}
, { IPC_ERROR_CONTACT_NETWORKD__NETWORKD, "ipc_contact_networkd: cannot retrieve fd"}
, IPC_ERROR_DEL_FD__NO_PARAM_CINFOS, "ipc_del_fd: no cinfos param"
, IPC_ERROR_DEL_FD__EMPTIED_LIST, "ipc_del_fd: empty list after realloc (memory problem)"
, IPC_ERROR_DEL_FD__EMPTY_LIST, "ipc_del_fd: empty list"
, IPC_ERROR_DEL_FD__CANNOT_FIND_CLIENT, "ipc_del_fd: cannot find user"
, { IPC_ERROR_HANDLE_NEW_CONNECTION__MALLOC, "ipc_handle_new_connection: error on malloc function" }
, 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"
, { IPC_ERROR_ADD__MALLOC, "ipc_add: first memory allocation failed" }
, { IPC_ERROR_ADD__EMPTY_LIST, "ipc_add: empty list: realloc failed" }
, { IPC_ERROR_ADD__NO_PARAM_CLIENTS, "ipc_add: no param client list" }
, { IPC_ERROR_ADD__NO_PARAM_CLIENT, "ipc_add: no param client" }
, { IPC_ERROR_ADD_FD__NO_PARAM_CINFOS, "ipc_add_fd: no cinfos param" }
, { IPC_ERROR_ADD_FD__EMPTY_LIST, "ipc_add_fd: empty list after realloc (memory problem)" }
, { IPC_ERROR_DEL_FD__NO_PARAM_CINFOS, "ipc_del_fd: no cinfos param" }
, { IPC_ERROR_DEL_FD__EMPTIED_LIST, "ipc_del_fd: empty list after realloc (memory problem)" }
, { IPC_ERROR_DEL_FD__EMPTY_LIST, "ipc_del_fd: empty list" }
, { IPC_ERROR_DEL_FD__CANNOT_FIND_CLIENT, "ipc_del_fd: cannot find user" }
, { IPC_ERROR_DEL__EMPTY_LIST, "ipc_del: empty list" }
, { IPC_ERROR_DEL__EMPTIED_LIST, "ipc_del: cannot realloc" }
, { IPC_ERROR_DEL__CANNOT_FIND_CLIENT, "ipc_del: cannot find client" }
, { IPC_ERROR_DEL__NO_CLIENTS_PARAM, "ipc_del: no clients param" }
, { IPC_ERROR_DEL__NO_CLIENT_PARAM, "ipc_del: no client param" }
/* unix socket */
, IPC_ERROR_USOCK_SEND, "usock_send: cannot send message"
, { 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_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_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_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_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_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"
, { 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" }
, { IPC_ERROR_USOCK_RECV__MESSAGE_SIZE, "ipc_usock_recv: message length > maximum allowed" }
/* 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_FORMAT_WRITE__MESSAGE_LENGTH, "ipc_message_write: message is longer than accepted" }
, 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__MESSAGE_SIZE, "ipc_message_format: length param > maximum allowed" }
, { IPC_ERROR_MESSAGE_FORMAT_READ__READ_MESSAGE_SIZE, "ipc_message_format: read message size > maximum allowed" }
, 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_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_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"
, { IPC_ERROR_MESSAGE_EMPTY__EMPTY_MESSAGE_LIST, "ipc_message_empty: empty message list" }
};
const char * ipc_errors_get (enum ipc_errors e)

400
src/ipc.h
View File

@ -9,133 +9,206 @@
#include <errno.h> // error numbers
#include <time.h>
/***
* global defaults
**/
#define RUNDIR "/run/ipc/"
#define PATH_MAX 4096
#define IPC_HEADER_SIZE 6
#define IPC_MAX_MESSAGE_SIZE 8000000-IPC_HEADER_SIZE
// #define IPC_MAX_MESSAGE_SIZE 100-IPC_HEADER_SIZE
// #include "queue.h"
#define SECURE_DECLARATION(t,v) t v; memset(&v,0,sizeof(t));
#define IPC_VERSION 1
#if ! defined(IPC_WITHOUT_ERRORS) && ! defined(IPC_WITH_ERRORS)
#define IPC_WITH_ERRORS 2
#endif
#define IPC_WITH_UNIX_SOCKETS
#ifdef IPC_WITH_UNIX_SOCKETS
#include "usocket.h"
#endif
/***
* grooming macros
**/
#define SECURE_DECLARATION(t,v) t v; memset(&v,0,sizeof(t));
#define SECURE_BUFFER_DECLARATION(type,name,size) type name[size]; memset(&name, 0, sizeof(type) * size);
#define SECURE_BUFFER_HEAP_ALLOCATION(p,len,instr,r) { p = malloc (len); if (p == NULL) { instr; r; } ; memset(p, 0, len); }
#define SECURE_BUFFER_HEAP_ALLOCATION_R(p,len,instr,r) SECURE_BUFFER_HEAP_ALLOCATION(p,len,instr, return r )
#define SECURE_BUFFER_HEAP_ALLOCATION_Q(p,len,instr,r) SECURE_BUFFER_HEAP_ALLOCATION(p,len,instr, exit(r))
#if defined(IPC_WITH_ERRORS) && IPC_WITH_ERRORS > 2
// print error string
#define PRINT_ERR(code) const char *estr = ipc_errors_get (code); LOG_ERROR ("%s", estr);
#define PRINT_ERR_STR(code,err) { const char *estr = ipc_errors_get (code); LOG_ERROR ("%s - %s", err, estr); }
#else
#define PRINT_ERR(code)
#define PRINT_ERR_STR(code,err)
#endif
// Test macros, requiring the variable `enum ipc_errors ret`
// one macro to rule them all!
// 1. function to test
// 2. Test IPC error based (test itself)
// 3. Print error (then ipc-error message)
// 4. Instructions to exec on failure
// 5. Return something
#define TIPC_T_P_I_R(f, t, err, instr, r) { enum ipc_errors ret = f;\
if (t) {\
PRINT_ERR_STR(ret, err); \
instr;\
r;\
} }
// P = print somehting with LOG_ERROR
// NP = no LOG_ERROR print
// R = return r param
// RR = return "ret" variable
// RV = return void
// Q = quit
// I = additionnal instructions before returning on error
#define TIPC_P_I_R(f, t, err, instr, r) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, err, instr, return r)
#define TIPC_P_I_Q(f, t, err, instr, r) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, err, instr, quit(r))
#define TIPC_P_Q(f, err,r) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, err, ;, exit(r))
#define TIPC_P_R(f, err,r) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, err, ;, return r)
#define TIPC_P_RR(f, err) TIPC_P_R(f,err,ret)
#define TIPC_F_RR(f, format) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, "", LOG_ERROR format ;, return ret)
#define TIPC_F_Q(f, format, r) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, "", LOG_ERROR format ;, exit(r))
#define TIPC_F_R(f, format, r) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, "", LOG_ERROR format ;, return r)
#define TIPC_P_RV(f, err) TIPC_P_R(f,err,;)
#define TIPC_P(f, err) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, err, ;, ;)
#define TIPC_T_I_P_Q(f,t,instr,err,r) TIPC_T_P_I_R(f, t, err, instr, exit(r))
#define TIPC_T_I_RR(f,t,instr) TIPC_T_P_I_R(f, t, "", instr, return ret)
#define TIPC_I_RR(f,instr) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, "", instr, return ret)
#define TIPC_RR(f) TIPC_T_P_I_R(f, ret != IPC_ERROR_NONE, "", ;, return ret)
#define TIPC_NP_RR(f) { enum ipc_errors ret = f; if (ret != IPC_ERROR_NONE) { return ret; } }
// Tests macros, do not require `enum ipc_errors ret` variable
// test => return error code
#define T_R(t,r) if t { return r; }
// test => perror, formatted message then return (for system functions)
#define T_PERROR_F_R(t,m,fmt,r) if t { perror(m); LOG_ERROR fmt; return r; }
// test => perror then return (for system functions)
#define T_PERROR_R(t,m,r) if t { perror(m); return r; }
// test => perror then exit (for system functions)
#define T_PERROR_Q(t,m,r) if t { perror(m); exit(r); }
// Switch cases macros
// print on error
#define ERROR_CASE(e,f,m) case e : { LOG_ERROR ("function %s: %s", f, m); } break;
/***
* structures and enumerations
**/
enum msg_types {
MSG_TYPE_SERVER_CLOSE = 0
, MSG_TYPE_ERR
, MSG_TYPE_DATA
, MSG_TYPE_ERR = 1
, MSG_TYPE_DATA = 2
, MSG_TYPE_NETWORK_LOOKUP = 3
} message_types;
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
IPC_EVENT_TYPE_NOT_SET = 0
, IPC_EVENT_TYPE_ERROR = 1
, IPC_EVENT_TYPE_EXTRA_SOCKET = 2
, IPC_EVENT_TYPE_SWITCH = 3
, IPC_EVENT_TYPE_CONNECTION = 4
, IPC_EVENT_TYPE_DISCONNECTION = 5
, IPC_EVENT_TYPE_MESSAGE = 6
, IPC_EVENT_TYPE_LOOKUP = 7
};
enum ipc_errors {
/* 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_ADD_FD__EMPTY_LIST
, IPC_ERROR_DEL_FD__NO_PARAM_CINFOS
, IPC_ERROR_DEL_FD__EMPTIED_LIST
, IPC_ERROR_DEL_FD__EMPTY_LIST
, IPC_ERROR_DEL_FD__CANNOT_FIND_CLIENT
, 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
IPC_ERROR_NONE = 0
, IPC_ERROR_NOT_ENOUGH_MEMORY = 1
, IPC_ERROR_CLOSED_RECIPIENT = 2
, IPC_ERROR_SERVICE_PATH__NO_PATH = 3
, IPC_ERROR_SERVICE_PATH__NO_SERVICE_NAME = 4
, IPC_ERROR_SERVER_INIT__NO_ENVIRONMENT_PARAM = 5
, IPC_ERROR_SERVER_INIT__NO_SERVICE_PARAM = 6
, IPC_ERROR_SERVER_INIT__NO_SERVER_NAME_PARAM = 7
, IPC_ERROR_SERVER_INIT__MALLOC = 8
, IPC_ERROR_WRITE__NO_MESSAGE_PARAM = 9
, IPC_ERROR_WRITE__NOT_ENOUGH_DATA = 10
, IPC_ERROR_READ__NO_MESSAGE_PARAM = 11
, IPC_ERROR_CONNECTION__NO_SERVER = 12
, IPC_ERROR_CONNECTION__NO_SERVICE_NAME = 13
, IPC_ERROR_CONNECTION__NO_ENVIRONMENT_PARAM = 14
, IPC_ERROR_CONNECTION_GEN__NO_CINFO = 15
, IPC_ERROR_ACCEPT__NO_SERVICE_PARAM = 16
, IPC_ERROR_ACCEPT__NO_CLIENT_PARAM = 17
, IPC_ERROR_ACCEPT = 18
, IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFO_PARAM = 19
, IPC_ERROR_HANDLE_NEW_CONNECTION__NO_CINFOS_PARAM = 20
, IPC_ERROR_WAIT_EVENT__SELECT = 21
, IPC_ERROR_WAIT_EVENT__NO_CLIENTS_PARAM = 22
, IPC_ERROR_WAIT_EVENT__NO_EVENT_PARAM = 23
, IPC_ERROR_HANDLE_NEW_CONNECTION__MALLOC = 24
, IPC_ERROR_ADD__EMPTY_LIST = 25
, IPC_ERROR_ADD__NO_PARAM_CLIENTS = 26
, IPC_ERROR_ADD__NO_PARAM_CLIENT = 27
, IPC_ERROR_ADD__MALLOC = 28
, IPC_ERROR_ADD_FD__NO_PARAM_CINFOS = 29
, IPC_ERROR_ADD_FD__EMPTY_LIST = 30
, IPC_ERROR_DEL_FD__NO_PARAM_CINFOS = 31
, IPC_ERROR_DEL_FD__EMPTIED_LIST = 32
, IPC_ERROR_DEL_FD__EMPTY_LIST = 33
, IPC_ERROR_DEL_FD__CANNOT_FIND_CLIENT = 34
, IPC_ERROR_CONTACT_NETWORKD__NO_SERVICE_NAME_PARAM = 35
, IPC_ERROR_CONTACT_NETWORKD__NO_SERVER_PARAM = 36
, IPC_ERROR_CONTACT_NETWORKD__NETWORKD = 37
, IPC_ERROR_DEL__EMPTY_LIST = 38
, IPC_ERROR_DEL__EMPTIED_LIST = 39
, IPC_ERROR_DEL__CANNOT_FIND_CLIENT = 40
, IPC_ERROR_DEL__NO_CLIENTS_PARAM = 41
, IPC_ERROR_DEL__NO_CLIENT_PARAM = 42
/* 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_CONNECT__CONNECT
, 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
, IPC_ERROR_USOCK_SEND = 1
, IPC_ERROR_USOCK_CONNECT__SOCKET = 43
, IPC_ERROR_USOCK_CONNECT__WRONG_FILE_DESCRIPTOR = 44
, IPC_ERROR_USOCK_CONNECT__EMPTY_PATH = 45
, IPC_ERROR_USOCK_CONNECT__CONNECT = 46
, IPC_ERROR_USOCK_CLOSE = 47
, IPC_ERROR_USOCK_REMOVE__UNLINK = 48
, IPC_ERROR_USOCK_REMOVE__NO_FILE = 49
, IPC_ERROR_USOCK_INIT__EMPTY_FILE_DESCRIPTOR = 50
, IPC_ERROR_USOCK_INIT__WRONG_FILE_DESCRIPTOR = 51
, IPC_ERROR_USOCK_INIT__EMPTY_PATH = 52
, IPC_ERROR_USOCK_INIT__BIND = 53
, IPC_ERROR_USOCK_INIT__LISTEN = 54
, IPC_ERROR_USOCK_ACCEPT__PATH_FILE_DESCRIPTOR = 55
, IPC_ERROR_USOCK_ACCEPT = 56
, IPC_ERROR_USOCK_RECV__NO_BUFFER = 57
, IPC_ERROR_USOCK_RECV__NO_LENGTH = 58
, IPC_ERROR_USOCK_RECV = 59
, IPC_ERROR_USOCK_RECV__MESSAGE_SIZE = 60
, IPC_ERROR_RECEIVE_FD__NO_PARAM_FD = 61
, IPC_ERROR_RECEIVE_FD__RECVMSG = 62
, IPC_ERROR_PROVIDE_FD__SENDMSG = 63
/* 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
, IPC_ERROR_MESSAGE_FORMAT_WRITE__MESSAGE_LENGTH = 64
, IPC_ERROR_MESSAGE_FORMAT__MESSAGE_SIZE = 65
, IPC_ERROR_MESSAGE_FORMAT__NO_MESSAGE_PARAM = 66
, IPC_ERROR_MESSAGE_FORMAT__INCONSISTENT_PARAMS = 67
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MESSAGE = 68
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MSIZE = 69
, IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_BUFFER = 70
, IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_MESSAGE = 71
, IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_BUFFER = 72
, IPC_ERROR_MESSAGE_FORMAT_READ__MESSAGE_SIZE = 73
, IPC_ERROR_MESSAGE_FORMAT_READ__READ_MESSAGE_SIZE = 74
, IPC_ERROR_MESSAGE_EMPTY__EMPTY_MESSAGE_LIST = 75
};
@ -149,7 +222,7 @@ struct ipc_connection_info {
struct ipc_connection_infos {
struct ipc_connection_info ** cinfos;
int32_t size;
size_t size;
};
@ -167,27 +240,42 @@ struct ipc_event {
};
/**
* MACROS
/***
* logging macros
**/
// #define IPC_WITH_ERRORS 3
#ifdef IPC_WITH_ERRORS
#include "logger.h"
#define handle_err(fun,msg)\
do { log_error ("%s: file %s line %d %s", fun, __FILE__, __LINE__, msg); } while (0)
// XXX: ##__VA_ARGS__ is a GNU extension to avoid requiring more arguments
#define LOG_ERROR(format, ...) log_error ( __FILE__ ":%d:" format, __LINE__, ##__VA_ARGS__ )
#define LOG_INFO(format, ...) log_info ( __FILE__ ":%d:" format, __LINE__, ##__VA_ARGS__ )
#else
#define handle_err(fun,msg)
#define LOG_ERROR(format, ...)
#define LOG_INFO(format, ...)
#endif
#if IPC_WITH_ERRORS > 2
#define LOG_DEBUG(format, ...) log_debug ( __FILE__ ":%d:" format, __LINE__, ##__VA_ARGS__ )
#else
#define LOG_DEBUG(format, ...)
#endif
/***
* ipc event macros
**/
#define IPC_EVENT_SET(pevent,type_,message_,origin_) {\
pevent->type = type_; \
pevent->m = message_; \
pevent->origin = origin_; \
};
enum ipc_connection_types {
IPC_CONNECTION_TYPE_IPC = 0
, IPC_CONNECTION_TYPE_EXTERNAL = 1
};
#define IPC_EVENT_CLEAN(pevent) {\
pevent->type = IPC_EVENT_TYPE_NOT_SET;\
if (pevent->m != NULL) {\
@ -197,21 +285,19 @@ struct ipc_event {
}\
};
#define IPC_WITH_UNIX_SOCKETS
#ifdef IPC_WITH_UNIX_SOCKETS
#include "usocket.h"
#endif
#define LOG
/***
* logging functions
**/
void log_error (const char* message, ...);
void log_info (const char* message, ...);
void log_debug (const char* message, ...);
/**
* 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);
@ -245,38 +331,76 @@ enum ipc_errors ipc_connection_gen (struct ipc_connection_info *cinfo
void ipc_connection_print (struct ipc_connection_info *cinfo);
void ipc_connections_print (struct ipc_connection_infos *cinfos);
void ipc_connections_close (struct ipc_connection_infos *cinfos);
// get explanation about an error
const char * ipc_errors_get (enum ipc_errors e);
/**
/***
* 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);
uint32_t ipc_message_raw_serialize (char *buffer, char type, char user_type, char * message, uint32_t message_size);
// used to create msg structure from buffer
enum ipc_errors 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, size_t msize);
// used to create buffer from msg structure
enum ipc_errors 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, size_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, char utype, const char *payload, ssize_t length);
enum ipc_errors ipc_message_format_data (struct ipc_message *m
, char utype, const char *payload, ssize_t length);
enum ipc_errors ipc_message_format (struct ipc_message *m, char type, char utype, const char *payload, size_t length);
enum ipc_errors ipc_message_format_data (struct ipc_message *m, char utype, const char *payload, size_t length);
enum ipc_errors ipc_message_format_server_close (struct ipc_message *m);
enum ipc_errors ipc_message_empty (struct ipc_message *m);
/***
* non public functions
**/
// non public functions
void service_path (char *path, const char *sname, int32_t index, int32_t version);
enum ipc_errors ipc_accept (struct ipc_connection_info *srv, struct ipc_connection_info *p);
enum ipc_errors ipc_contact_networkd (struct ipc_connection_info *srv, const char *sname);
enum ipc_errors service_path (char *path, const char *sname, int32_t index, int32_t version);
char * log_get_logfile_dir (char *buf, size_t size);
void log_get_logfile_name (char *buf, size_t size);
/***
* networkd enumerations, structures and functions
**/
struct ipc_switching {
int orig;
int dest;
};
struct ipc_switchings {
struct ipc_switching *collection;
size_t size;
};
struct networkd {
int cpt;
struct ipc_connection_info *srv;
struct ipc_connection_infos *clients;
struct ipc_switchings * TCP_TO_IPC;
};
enum ipc_errors ipc_wait_event_networkd (struct ipc_connection_infos *cinfos
, struct ipc_connection_info *cinfo // NULL for clients
, struct ipc_event *event
, struct ipc_switchings *switchdb);
void ipc_switching_add (struct ipc_switchings *is, int orig, int dest);
int ipc_switching_del (struct ipc_switchings *is, int fd);
int ipc_switching_get (struct ipc_switchings *is, int fd);
void ipc_switching_free (struct ipc_switchings *is);
void ipc_switching_print (struct ipc_switchings *is);
enum ipc_errors ipc_receive_fd (int sock, int *fd);
enum ipc_errors ipc_provide_fd (int sock, int fd);
#endif

78
src/logger.c
View File

@ -3,18 +3,86 @@
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "ipc.h"
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_GNU_SOURCE)
#else
extern char *__progname;
#endif
char * log_get_logfile_dir (char *buf, size_t size)
{
char * datadir = getenv ("XDG_DATA_HOME");
if (datadir == NULL) {
datadir = getenv ("HOME");
if (datadir == NULL) {
return buf + snprintf (buf, size, "./ipc/");
}
else {
return buf + snprintf (buf, size, "%s/.local/share/ipc/", datadir);
}
}
return buf + snprintf (buf, size, "%s/ipc/", datadir);
}
void log_get_logfile_name (char *buf, size_t size) {
char *logfile = getenv ("IPC_LOGFILE");
if (logfile == NULL) {
char *buf_after_dir;
buf_after_dir = log_get_logfile_dir (buf, size);
pid_t pid = getpid();
#if defined(__APPLE__) || defined(__FreeBSD__)
const char * appname = getprogname();
#elif defined(_GNU_SOURCE)
const char * appname = program_invocation_name;
#elif defined(__linux__)
const char * appname = __progname;
#else
#error "cannot know the application name for this environment"
#endif
snprintf (buf_after_dir, size - (buf_after_dir - buf), "%s-%d.log", appname, pid);
return;
}
snprintf (buf, size, "%s", logfile);
}
void log_format (const char* tag, const char* message, va_list args) {
time_t now;
time(&now);
char * date =ctime(&now);
date[strlen(date) - 1] = '\0';
printf("%s:%s: ", date, tag);
vprintf(message, args);
struct tm *t = localtime (&now);
printf("\n");
SECURE_BUFFER_DECLARATION (char, date, 200);
snprintf (date, 200, "%d-%02d-%02d_%02d-%02d-%02d"
, t->tm_year+1900, t->tm_mon +1, t->tm_mday
, t->tm_hour, t->tm_min, t->tm_sec);
SECURE_BUFFER_DECLARATION (char, logfile, BUFSIZ);
log_get_logfile_name (logfile, BUFSIZ);
FILE * logfd = fopen (logfile, "a");
if (logfd == NULL) {
fprintf (stderr, "something gone horribly wrong: cannot open logfile: %s\n", logfile);
return;
}
fprintf (logfd, "%s:%s:", date, tag);
vfprintf(logfd, message, args);
fprintf (logfd, "\n");
fflush (logfd);
fclose (logfd);
}
void log_error (const char* message, ...) {

203
src/message.c
View File

@ -9,70 +9,55 @@
#include "message.h"
#include "usocket.h"
#include <assert.h>
// #define IPC_WITH_ERRORS 3
uint32_t ipc_message_raw_serialize (char *buffer, char type, char user_type, char * message, uint32_t message_size)
{
uint32_t msize = 6 + message_size;
buffer[0] = type;
uint32_t msize_n = htonl (message_size);
uint32_t index = 1;
memcpy (buffer + index, &msize_n, sizeof (uint32_t));
index += sizeof (uint32_t);
buffer[index] = user_type;
index += 1;
memcpy (buffer + index, message, message_size);
return msize;
}
#define IPC_WITH_ERRORS 3
void ipc_message_print (const struct ipc_message *m)
{
assert (m != NULL);
if (m == NULL) return;
#if defined(IPC_WITH_ERRORS) && IPC_WITH_ERRORS > 2
printf ("msg: type %d len %d\n", m->type, m->length);
LOG_INFO ("msg: type %d len %d\n", m->type, m->length);
#endif
}
enum ipc_errors ipc_message_new (struct ipc_message **m, ssize_t paylen)
enum ipc_errors ipc_message_format_read (struct ipc_message *m, const char *buf, size_t msize)
{
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 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;
}
T_R ((m == NULL), IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_MESSAGE);
T_R ((buf == NULL), IPC_ERROR_MESSAGE_FORMAT_READ__EMPTY_BUFFER);
T_R ((msize > IPC_MAX_MESSAGE_SIZE), IPC_ERROR_MESSAGE_FORMAT_READ__MESSAGE_SIZE);
// message format:
// Type (1 B) | Length (4 B) | UserType (1 B) | Payload (Length B)
m->type = buf[0];
size_t unformated_size = 0;
memcpy (&unformated_size, buf+1, sizeof(size_t));
uint32_t unformated_size = 0;
memcpy (&unformated_size, buf+1, sizeof(uint32_t));
m->length = ntohl (unformated_size);
m->user_type = buf[1 + sizeof m->length];
assert (m->length <= IPC_MAX_MESSAGE_SIZE);
T_R ((m->length > IPC_MAX_MESSAGE_SIZE), IPC_ERROR_MESSAGE_FORMAT_READ__READ_MESSAGE_SIZE);
#if defined(IPC_WITH_ERRORS) && IPC_WITH_ERRORS > 2
printf ("receiving msg:\ttype %d, paylen %u, total %lu\n", m->type, m->length, msize);
LOG_INFO ("receiving msg: type %d, paylen %u, total %lu", m->type, m->length, msize);
#endif
assert (m->length == msize - IPC_HEADER_SIZE || m->length == 0);
T_R ((m->length != msize - IPC_HEADER_SIZE && m->length != 0)
, IPC_ERROR_MESSAGE_FORMAT_READ__READ_MESSAGE_SIZE);
if (m->payload != NULL) {
free (m->payload);
@ -90,24 +75,12 @@ enum ipc_errors ipc_message_format_read (struct ipc_message *m, const char *buf,
return IPC_ERROR_NONE;
}
enum ipc_errors 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, size_t *msize)
{
assert (m != NULL);
assert (buf != NULL);
assert (msize != NULL);
assert (m->length <= IPC_MAX_MESSAGE_SIZE);
if (m == NULL) {
return IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MESSAGE;
}
if (buf == NULL) {
return IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_BUFFER;
}
if (msize == NULL) {
return IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MSIZE;
}
T_R ((m == NULL), IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MESSAGE);
T_R ((buf == NULL), IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_BUFFER);
T_R ((msize == NULL), IPC_ERROR_MESSAGE_FORMAT_WRITE__EMPTY_MSIZE);
T_R ((m->length > IPC_MAX_MESSAGE_SIZE), IPC_ERROR_MESSAGE_FORMAT_WRITE__MESSAGE_LENGTH);
if (*buf == NULL) {
*buf = malloc (IPC_HEADER_SIZE + m->length);
@ -115,10 +88,9 @@ enum ipc_errors ipc_message_format_write (const struct ipc_message *m, char **bu
}
char *buffer = *buf;
uint32_t paylen = htonl(m->length);
uint32_t net_paylen = htonl(m->length);
buffer[0] = m->type;
uint32_t net_paylen = htonl(m->length);
memcpy (buffer + 1, &net_paylen, sizeof(uint32_t));
buffer[1 + sizeof m->length] = m->user_type;
if (m->payload != NULL && m->length > 0) {
@ -128,96 +100,21 @@ enum ipc_errors ipc_message_format_write (const struct ipc_message *m, char **bu
*msize = IPC_HEADER_SIZE + m->length;
#if defined(IPC_WITH_ERRORS) && IPC_WITH_ERRORS > 2
printf ("sending msg:\ttype %u, paylen %u, msize %lu\n", m->type, m->length, *msize);
LOG_INFO ("sending msg: type %u, paylen %u, msize %lu", m->type, m->length, *msize);
#endif
return IPC_ERROR_NONE;
}
// 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;
enum ipc_errors ret = usock_recv (fd, &buf, &msize);
if (ret != IPC_ERROR_NONE && ret != IPC_ERROR_CLOSED_RECIPIENT) {
handle_err ("msg_read", "usock_recv");
return ret;
}
// closed recipient, buffer already freed
if (ret == IPC_ERROR_CLOSED_RECIPIENT) {
return IPC_ERROR_CLOSED_RECIPIENT;
}
if (buf != NULL) {
ret = ipc_message_format_read (m, buf, msize);
free (buf);
}
return ret; // propagates ipc_message_format return
}
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;
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) {
handle_err ("msg_write", "usock_send did not send enough data");
return IPC_ERROR_MESSAGE_WRITE__NOT_ENOUGH_DATA;
}
return IPC_ERROR_NONE;
}
// MSG FORMAT
enum ipc_errors ipc_message_format (struct ipc_message *m
, char type, char utype, const char *payload, ssize_t length)
, char type, char utype, const char *payload, size_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");
printf ("msg to format: %ld B)\n", length);
return IPC_ERROR_MESSAGE_FORMAT__LENGTH;
}
T_R ((m == NULL), IPC_ERROR_MESSAGE_FORMAT__NO_MESSAGE_PARAM);
T_R ((length > IPC_MAX_MESSAGE_SIZE), IPC_ERROR_MESSAGE_FORMAT__MESSAGE_SIZE);
T_R (((length == 0 && payload != NULL) || (length > 0 && payload == NULL))
, IPC_ERROR_MESSAGE_FORMAT__INCONSISTENT_PARAMS);
m->type = type;
m->user_type = utype;
@ -228,11 +125,7 @@ enum ipc_errors ipc_message_format (struct ipc_message *m
free (m->payload);
}
m->payload = malloc (length);
if (m->payload == NULL) {
return IPC_ERROR_NOT_ENOUGH_MEMORY;
}
memset (m->payload, 0, length);
SECURE_BUFFER_HEAP_ALLOCATION_R (m->payload, length, , IPC_ERROR_NOT_ENOUGH_MEMORY);
}
if (payload != NULL) {
@ -241,7 +134,7 @@ enum ipc_errors ipc_message_format (struct ipc_message *m
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_message_format_data (struct ipc_message *m, char utype, const char *payload, ssize_t length)
enum ipc_errors ipc_message_format_data (struct ipc_message *m, char utype, const char *payload, size_t length)
{
return ipc_message_format (m, MSG_TYPE_DATA, utype, payload, length);
}
@ -253,11 +146,7 @@ enum ipc_errors ipc_message_format_server_close (struct ipc_message *m)
enum ipc_errors ipc_message_empty (struct ipc_message *m)
{
assert (m != NULL);
if (m == NULL) {
return IPC_ERROR_MESSAGE_EMPTY__EMPTY_MESSAGE_LIST;
}
T_R ((m == NULL), IPC_ERROR_MESSAGE_EMPTY__EMPTY_MESSAGE_LIST);
if (m->payload != NULL) {
free (m->payload);

163
src/network.c Normal file
View File

@ -0,0 +1,163 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <sys/stat.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>
#include <assert.h>
#include <stdarg.h>
#include "ipc.h"
/**
* TODO:
* describe a protocol to get this working into networkd
* asking networkd for a fd with an URI
* URI should contain: who (the service name), where (destination), how (protocol)
* networkd initiates a communication with the requested service
* networkd sends the fd
* get a networkd working with this
*/
enum ipc_errors ipc_receive_fd (int sock, int *fd)
{
T_R ((fd == NULL), IPC_ERROR_RECEIVE_FD__NO_PARAM_FD);
*fd = -1;
SECURE_DECLARATION (struct msghdr, msg);
SECURE_BUFFER_DECLARATION (char, c_buffer, 256);
/* On Mac OS X, the struct iovec is needed, even if it points to minimal data */
char m_buffer[1];
struct iovec io = { .iov_base = m_buffer, .iov_len = sizeof(m_buffer) };
msg.msg_iov = &io;
msg.msg_iovlen = 1;
msg.msg_control = c_buffer;
msg.msg_controllen = sizeof(c_buffer);
T_PERROR_R ((recvmsg(sock, &msg, 0) <= 0), "recvmsg", IPC_ERROR_RECEIVE_FD__RECVMSG);
struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
memmove(fd, CMSG_DATA(cmsg), sizeof(*fd));
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_provide_fd (int sock, int fd)
{
SECURE_DECLARATION (struct msghdr, msg);
SECURE_BUFFER_DECLARATION (char, buf, CMSG_SPACE(sizeof(fd)));
/* On Mac OS X, the struct iovec is needed, even if it points to minimal data */
struct iovec io = { .iov_base = "", .iov_len = 1 };
msg.msg_iov = &io;
msg.msg_iovlen = 1;
msg.msg_control = buf;
msg.msg_controllen = sizeof(buf);
struct cmsghdr * cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
memmove(CMSG_DATA(cmsg), &fd, sizeof(fd));
msg.msg_controllen = cmsg->cmsg_len;
T_PERROR_R ((sendmsg(sock, &msg, 0) < 0), "sendmsg", IPC_ERROR_PROVIDE_FD__SENDMSG);
return IPC_ERROR_NONE;
}
void ipc_switching_add (struct ipc_switchings *is, int orig, int dest)
{
is->collection = realloc(is->collection, sizeof(struct ipc_switching) * (is->size+1));
if (is->collection == NULL) {
LOG_ERROR ("error realloc");
exit (EXIT_FAILURE);
}
is->size++;
is->collection[is->size-1].orig = orig;
is->collection[is->size-1].dest = dest;
}
int ipc_switching_del (struct ipc_switchings *is, int fd)
{
for (size_t i = 0; i < is->size; i++) {
if (is->collection[i].orig == fd || is->collection[i].dest == fd) {
int ret;
if (fd == is->collection[i].orig) {
ret = is->collection[i].dest;
}
else {
ret = is->collection[i].orig;
}
is->collection[i].orig = is->collection[is->size-1].orig;
is->collection[i].dest = is->collection[is->size-1].dest;
size_t s = (is->size - 1) > 0 ? (is->size - 1) : 1;
is->collection = realloc(is->collection, sizeof(struct ipc_switching) * s);
if (is->collection == NULL) {
LOG_ERROR ("error realloc");
exit (EXIT_FAILURE);
}
is->size--;
return ret;
}
}
return -1;
}
int ipc_switching_get (struct ipc_switchings *is, int fd)
{
for (size_t i = 0; i < is->size; i++) {
if (is->collection[i].orig == fd) {
return is->collection[i].dest;
}
else if (is->collection[i].dest == fd) {
return is->collection[i].orig;
}
}
return -1;
}
void ipc_switching_free (struct ipc_switchings *is)
{
if (is == NULL)
return;
if (is->collection != NULL) {
free (is->collection);
is->collection = NULL;
}
is->size = 0;
}
void ipc_switching_print (struct ipc_switchings *is)
{
for (size_t i = 0; i < is->size; i++) {
LOG_DEBUG ("client %d - %d", is->collection[i].orig, is->collection[i].dest);
}
}

234
src/usocket.c
View File

@ -9,59 +9,45 @@
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <arpa/inet.h>
#include "usocket.h"
#include "utils.h"
#define IPC_DEBUG
#undef handle_err
#define handle_err(a,b) fprintf (stderr, "FUNCTION %s LINE %d ERROR %s\n", a, __LINE__, b);
// #define IPC_DEBUG 3
/**
* TODO: non blocking read
*/
enum ipc_errors 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, size_t len, size_t *sent)
{
ssize_t ret = 0;
ret = send (fd, buf, len, MSG_NOSIGNAL);
if (ret <= 0) {
handle_err ("usock_send", "send ret <= 0");
return IPC_ERROR_USOCK_SEND;
}
T_R ((ret <= 0), IPC_ERROR_USOCK_SEND);
*sent = ret;
return IPC_ERROR_NONE;
}
// *len is changed to the total message size read (header + payload)
enum ipc_errors usock_recv (const int32_t fd, char **buf, ssize_t *len)
enum ipc_errors usock_recv (const int32_t fd, char **buf, size_t *len)
{
assert(buf != NULL);
assert(len != NULL);
T_R ((buf == NULL), IPC_ERROR_USOCK_RECV__NO_BUFFER);
T_R ((len == NULL), IPC_ERROR_USOCK_RECV__NO_LENGTH);
int32_t ret_recv = 0;
if (buf == NULL) {
handle_err ("usock_recv", "buf == NULL");
return IPC_ERROR_USOCK_RECV__NO_BUFFER;
}
if (len == NULL) {
handle_err ("usock_recv", "len == NULL");
return IPC_ERROR_USOCK_RECV__NO_LENGTH;
}
if (*len == 0)
*len = IPC_MAX_MESSAGE_SIZE;
if (*buf == NULL) {
// do not allocate too much memory
if (*len > IPC_MAX_MESSAGE_SIZE) {
handle_err ("usock_recv", "len > IPC_MAX_MESSAGE_SIZE");
LOG_ERROR ("usock_recv: len > IPC_MAX_MESSAGE_SIZE");
*len = IPC_MAX_MESSAGE_SIZE;
}
*buf = malloc (*len + IPC_HEADER_SIZE);
SECURE_BUFFER_HEAP_ALLOCATION (*buf,*len + IPC_HEADER_SIZE, , return (IPC_ERROR_NOT_ENOUGH_MEMORY));
}
uint32_t msize = 0;
@ -69,99 +55,78 @@ enum ipc_errors usock_recv (const int32_t fd, char **buf, ssize_t *len)
do {
ret_recv = recv (fd, *buf, *len, 0);
#ifdef IPC_DEBUG
if (ret_recv > 0) {
print_hexa ("msg recv", (uint8_t *)*buf, ret_recv);
fflush(stdout);
}
#endif
if (ret_recv > 0) {
if (msize == 0) {
memcpy (&msize, *buf + 1, sizeof msize);
}
else {
printf ("pas la première boucle, msize == %u\n", msize);
}
msize = ntohl (msize);
if (msize >= IPC_MAX_MESSAGE_SIZE) {
#ifdef IPC_DEBUG
printf ("lecture bien passée : %d octets\n", ret_recv);
print_hexa ("msg recv", (uint8_t *)*buf, ret_recv);
fflush(stdout);
#endif
}
assert (msize < IPC_MAX_MESSAGE_SIZE);
T_R ((msize > IPC_MAX_MESSAGE_SIZE), IPC_ERROR_USOCK_RECV__MESSAGE_SIZE);
msize_read += ret_recv - IPC_HEADER_SIZE;
}
else if (ret_recv < 0) {
if (*buf != NULL)
if (*buf != NULL) {
free (*buf);
*buf = NULL;
}
*len = 0;
switch (errno) {
// The receive buffer pointer(s) point outside the process's address space.
case EFAULT:
handle_err ("usock_recv", "critical error: use of unallocated memory, quitting...");
fprintf (stderr, "ERROR WHILE RECEIVING: EFAULT\n");
break;
ERROR_CASE (EFAULT, "usock_recv", "critical error: use of unallocated memory, quitting...");
// Invalid argument passed.
case EINVAL:
handle_err ("usock_recv", "critical error: invalid arguments to read(2), quitting...");
fprintf (stderr, "ERROR WHILE RECEIVING: EINVAL\n");
break;
ERROR_CASE (EINVAL, "usock_recv", "critical error: invalid arguments to read(2), quitting...");
// Could not allocate memory for recvmsg().
case ENOMEM:
handle_err ("usock_recv", "critical error: cannot allocate memory, quitting...");
fprintf (stderr, "ERROR WHILE RECEIVING: ENOMEM\n");
break;
ERROR_CASE (ENOMEM, "usock_recv", "critical error: cannot allocate memory, quitting...");
// The argument sockfd is an invalid descriptor.
case EBADF:
handle_err ("usock_recv", "critical error: invalid descriptor, quitting...");
fprintf (stderr, "ERROR WHILE RECEIVING: EBADF\n");
break;
ERROR_CASE (EBADF, "usock_recv", "critical error: invalid descriptor, quitting...");
// The file descriptor sockfd does not refer to a socket.
case ENOTSOCK:
handle_err ("usock_recv", "critical error: fd is not a socket, quitting...");
fprintf (stderr, "ERROR WHILE RECEIVING: ENOTSOCK\n");
break;
ERROR_CASE (ENOTSOCK, "usock_recv", "critical error: fd is not a socket, quitting...");
// The socket is associated with a connection-oriented protocol and has not
// been connected (see connect(2) and accept(2)).
case ENOTCONN:
handle_err ("usock_recv", "critical error: read(2) on a non connected socket, quitting...");
fprintf (stderr, "ERROR WHILE RECEIVING: ENOTCONN\n");
break;
ERROR_CASE (ENOTCONN, "usock_recv", "critical error: read(2) on a non connected socket, quitting...");
case EAGAIN:
fprintf (stderr, "ERROR WHILE RECEIVING: EAGAIN / EWOULDBLOCK\n");
break;
ERROR_CASE (EAGAIN, "usock_recv", "ERROR WHILE RECEIVING: EAGAIN / EWOULDBLOCK");
// A remote host refused to allow the network connection
// (typically because it is not running the requested service).
case ECONNREFUSED:
fprintf (stderr, "ERROR WHILE RECEIVING: ECONNREFUSED\n");
break;
ERROR_CASE (ECONNREFUSED, "usock_recv", "ERROR WHILE RECEIVING: ECONNREFUSED");
// The receive was interrupted by delivery of a signal before
// any data were available; see signal(7).
case EINTR:
handle_err ("usock_recv", "unsupported error");
break;
ERROR_CASE (EINTR, "usock_recv", "unsupported error");
default:
printf ("usock_recv unsupported error : %d\n", errno);
handle_err ("usock_recv", "unsupported error");
LOG_ERROR ("usock_recv: unsupported error");
}
handle_err ("usock_recv", "recv < 0");
perror("recv");
LOG_ERROR ("usock_recv: recv < 0");
return IPC_ERROR_USOCK_RECV;
}
#if 0
#if defined(IPC_WITH_ERRORS) && IPC_WITH_ERRORS > 2
printf ("fragmentation: message size read %u, should read %u\n", msize_read, msize);
LOG_ERROR ("fragmentation: message size read %u, should read %u", msize_read, msize);
#endif
#endif
} while (msize > msize_read);
@ -173,6 +138,7 @@ enum ipc_errors usock_recv (const int32_t fd, char **buf, ssize_t *len)
free (*buf);
*buf = NULL;
}
*len = 0;
return IPC_ERROR_CLOSED_RECIPIENT;
}
@ -183,41 +149,24 @@ enum ipc_errors usock_recv (const int32_t fd, char **buf, ssize_t *len)
enum ipc_errors usock_connect (int32_t *fd, const char *path)
{
assert (fd != NULL);
assert (path != NULL);
T_R ((fd == NULL), IPC_ERROR_USOCK_CONNECT__WRONG_FILE_DESCRIPTOR);
T_R ((path == NULL), IPC_ERROR_USOCK_CONNECT__EMPTY_PATH);
if (fd == NULL) {
handle_err ("usock_connect", "fd == NULL");
return IPC_ERROR_USOCK_CONNECT__WRONG_FILE_DESCRIPTOR;
}
if (path == NULL) {
handle_err ("usock_connect", "path == NULL");
return IPC_ERROR_USOCK_CONNECT__EMPTY_PATH;
}
SECURE_DECLARATION (struct sockaddr_un, my_addr);
my_addr.sun_family = AF_UNIX;
int32_t sfd;
struct sockaddr_un my_addr;
socklen_t peer_addr_size;
socklen_t peer_addr_size = sizeof(struct sockaddr_un);
sfd = socket (AF_UNIX, SOCK_STREAM, 0);
if (sfd == -1) {
handle_err ("usock_connect", "sfd == -1");
return IPC_ERROR_USOCK_CONNECT__SOCKET;
}
// clear structure
memset(&my_addr, 0, sizeof(struct sockaddr_un));
my_addr.sun_family = AF_UNIX;
T_PERROR_R (((sfd = socket (AF_UNIX, SOCK_STREAM, 0)) == -1), "socket", IPC_ERROR_USOCK_CONNECT__SOCKET);
strncpy(my_addr.sun_path, path, (strlen (path) < PATH_MAX) ? strlen(path) : PATH_MAX);
peer_addr_size = sizeof(struct sockaddr_un);
if(connect(sfd, (struct sockaddr *) &my_addr, peer_addr_size) == -1) {
handle_err ("usock_connect", "connect == -1");
perror("connect");
return IPC_ERROR_USOCK_CONNECT__CONNECT;
}
/** TODO: massive series of tests */
T_PERROR_F_R (
/** test */ (connect(sfd, (struct sockaddr *) &my_addr, peer_addr_size) == -1)
, /** perror */ "connect"
, /** log error */ ("unix socket connection to the path %s not possible", path)
, /** return value */ IPC_ERROR_USOCK_CONNECT__CONNECT);
*fd = sfd;
@ -226,52 +175,26 @@ enum ipc_errors usock_connect (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 IPC_ERROR_USOCK_INIT__EMPTY_FILE_DESCRIPTOR;
}
if (path == NULL) {
handle_err ("usock_init", "path == NULL");
return IPC_ERROR_USOCK_INIT__EMPTY_PATH;
}
int32_t sfd;
struct sockaddr_un my_addr;
socklen_t peer_addr_size;
sfd = socket (AF_UNIX, SOCK_STREAM, 0);
if (sfd == -1) {
handle_err ("usock_init", "sfd == -1");
return IPC_ERROR_USOCK_INIT__WRONG_FILE_DESCRIPTOR;
}
// clear structure
memset(&my_addr, 0, sizeof(struct sockaddr_un));
T_R ((fd == NULL), IPC_ERROR_USOCK_INIT__EMPTY_FILE_DESCRIPTOR);
T_R ((path == NULL), IPC_ERROR_USOCK_INIT__EMPTY_PATH);
SECURE_DECLARATION (struct sockaddr_un, my_addr);
my_addr.sun_family = AF_UNIX;
strncpy(my_addr.sun_path, path, strlen (path));
int32_t sfd;
socklen_t peer_addr_size;
T_PERROR_R (((sfd = socket (AF_UNIX, SOCK_STREAM, 0)) == -1), "socket", IPC_ERROR_USOCK_INIT__WRONG_FILE_DESCRIPTOR);
// 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 IPC_ERROR_USOCK_INIT__BIND;
}
if (listen (sfd, LISTEN_BACKLOG) == -1) {
handle_err ("usock_init", "listen == -1");
perror("listen");
return IPC_ERROR_USOCK_INIT__LISTEN;
}
T_PERROR_R ((bind (sfd, (struct sockaddr *) &my_addr, peer_addr_size) == -1), "bind", IPC_ERROR_USOCK_INIT__BIND);
T_PERROR_R ((listen (sfd, LISTEN_BACKLOG) == -1), "listen", IPC_ERROR_USOCK_INIT__LISTEN);
*fd = sfd;
@ -280,54 +203,29 @@ enum ipc_errors usock_init (int32_t *fd, const char *path)
enum ipc_errors usock_accept (int32_t fd, int32_t *pfd)
{
assert (pfd != NULL);
T_R ((pfd == NULL), IPC_ERROR_USOCK_ACCEPT__PATH_FILE_DESCRIPTOR);
if (pfd == NULL) {
handle_err ("usock_accept", "pfd == NULL");
return IPC_ERROR_USOCK_ACCEPT__PATH_FILE_DESCRIPTOR;
}
struct sockaddr_un peer_addr;
memset (&peer_addr, 0, sizeof (struct sockaddr_un));
SECURE_DECLARATION (struct sockaddr_un, peer_addr);
socklen_t peer_addr_size = 0;
*pfd = accept (fd, (struct sockaddr *) &peer_addr, &peer_addr_size);
if (*pfd < 0) {
handle_err ("usock_accept", "accept < 0");
perror("listen");
return IPC_ERROR_USOCK_ACCEPT;
}
T_PERROR_R (((*pfd = accept (fd, (struct sockaddr *) &peer_addr, &peer_addr_size)) < 0), "accept", IPC_ERROR_USOCK_ACCEPT);
return IPC_ERROR_NONE;
}
enum ipc_errors usock_close (int32_t fd)
{
int32_t ret = 0;
ret = close (fd);
if (ret < 0) {
handle_err ("usock_close", "close ret < 0");
perror ("closing");
return IPC_ERROR_USOCK_CLOSE;
}
T_PERROR_R ((close (fd) < 0), "close", IPC_ERROR_USOCK_CLOSE);
return IPC_ERROR_NONE;
}
enum ipc_errors usock_remove (const char *path)
{
struct stat file_state;
memset (&file_state, 0, sizeof (struct stat));
SECURE_DECLARATION(struct stat, file_state);
// 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;
}
T_R ((stat (path, &file_state) != 0), IPC_ERROR_USOCK_REMOVE__NO_FILE);
T_R ((unlink (path) != 0), IPC_ERROR_USOCK_REMOVE__UNLINK);
return IPC_ERROR_USOCK_REMOVE__NO_FILE;
return IPC_ERROR_NONE;
}

4
src/usocket.h
View File

@ -7,12 +7,12 @@
// input: len = max buf size
// output: *sent = nb received bytes
enum ipc_errors 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, size_t len, size_t *sent);
// allocation of *len bytes on *buf == NULL
//
// output: *len = nb sent bytes
enum ipc_errors usock_recv (int32_t fd, char **buf, ssize_t *len);
enum ipc_errors usock_recv (int32_t fd, char **buf, size_t *len);
enum ipc_errors usock_close (int32_t fd);

38
src/utils.c
View File

@ -1,22 +1,36 @@
#include "utils.h"
#include "ipc.h"
void print_hexa (const char *prefix, uint8_t *payload, size_t size)
{
if (! payload)
if (payload == NULL)
return ;
SECURE_BUFFER_DECLARATION (char, buffer, BUFSIZ);
char *cur = buffer, * const end = buffer + sizeof buffer;
size_t i;
for(i = 0; i < size; i++)
{
if(! (i % 4))
printf("\n%s (%ld) ", prefix, size);
printf("%2x ", payload[i]);
size_t linenum = 0;
for(i = 0; i < size; i++) {
if (i == 0) {
cur += snprintf(cur, end-cur, "\033[32m[%2ld/%2ld]\033[00m \033[36m%s\033[00m (%ld) ", linenum +1, (size / 16) +1, prefix, size);
linenum ++;
}
else if(! (i % 16)) {
LOG_DEBUG ("%s", buffer);
memset (buffer, 0, BUFSIZ);
cur = buffer;
cur += snprintf(cur, end-cur, "\033[32m[%2ld/%2ld]\033[00m \033[36m%s\033[00m (%ld) ", linenum +1, (size / 16) +1, prefix, size);
linenum ++;
}
else if (! (i % 4)) {
cur += snprintf(cur, end-cur, " ");
}
cur += snprintf(cur, end-cur, "%2x ", payload[i]);
}
printf("\n");
}
void mprint_hexa (char *prefix, uint8_t *buf, size_t length)
{
print_hexa (prefix, buf, length);
if ((i % 16)) {
LOG_DEBUG ("%s", buffer);
}
}

1
src/utils.h
View File

@ -8,6 +8,5 @@
#include <stdint.h>
void print_hexa (const char *prefix, uint8_t *payload, size_t size);
void mprint_hexa (char *prefix, uint8_t *buf, size_t length);
#endif