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authorJose Bollo <jose.bollo@iot.bzh>2018-08-20 16:09:40 +0200
committerJosé Bollo <jose.bollo@iot.bzh>2018-08-22 14:03:52 +0200
commit2f7dde4aa74dfa7caba3ddcf125de4693b983c4f (patch)
treecd1e3e526629d2cd4bc2f19760bb611789ea4b61
parent58a21f8f9465a20cba3fdfc3abaee866dafc245f (diff)
afb-socket: Improvement
Allows to either open a 'struct fdev*' or a int. This prepares further integration in afb-api-ws. Bug-AGL: SPEC-1668 Change-Id: I3d61be582bceaab636460b3c7de3ac2f24ed9473 Signed-off-by: Jose Bollo <jose.bollo@iot.bzh>
-rw-r--r--src/afb-api-ws.c4
-rw-r--r--src/afb-socket.c253
-rw-r--r--src/afb-socket.h6
3 files changed, 194 insertions, 69 deletions
diff --git a/src/afb-api-ws.c b/src/afb-api-ws.c
index 24ffefef..611f887c 100644
--- a/src/afb-api-ws.c
+++ b/src/afb-api-ws.c
@@ -98,7 +98,7 @@ int afb_api_ws_add_client(const char *uri, struct afb_apiset *declare_set, struc
goto error;
/* connect to the service */
- apiws->fdev = afb_socket_open(apiws->uri, 0);
+ apiws->fdev = afb_socket_open_fdev(apiws->uri, 0);
if (!apiws->fdev)
goto error2;
@@ -184,7 +184,7 @@ static int api_ws_server_connect(struct api_ws *apiws)
api_ws_server_disconnect(apiws);
/* request the service object name */
- apiws->fdev = afb_socket_open(apiws->uri, 1);
+ apiws->fdev = afb_socket_open_fdev(apiws->uri, 1);
if (!apiws->fdev)
ERROR("can't create socket %s", apiws->uri);
else {
diff --git a/src/afb-socket.c b/src/afb-socket.c
index c6402d42..ebbc58ec 100644
--- a/src/afb-socket.c
+++ b/src/afb-socket.c
@@ -39,6 +39,74 @@
/******************************************************************************/
+/**
+ * known types
+ */
+enum type {
+ /** type internet */
+ Type_Inet,
+
+ /** type systemd */
+ Type_Systemd,
+
+ /** type Unix */
+ Type_Unix
+};
+
+/**
+ * Structure for known entries
+ */
+struct entry
+{
+ /** the known prefix */
+ const char *prefix;
+
+ /** the type of the entry */
+ unsigned type: 2;
+
+ /** should not set SO_REUSEADDR for servers */
+ unsigned noreuseaddr: 1;
+
+ /** should not call listen for servers */
+ unsigned nolisten: 1;
+};
+
+/**
+ * The known entries with the default one at the first place
+ */
+static struct entry entries[] = {
+ {
+ .prefix = "tcp:",
+ .type = Type_Inet
+ },
+ {
+ .prefix = "sd:",
+ .type = Type_Systemd,
+ .noreuseaddr = 1,
+ .nolisten = 1
+ },
+ {
+ .prefix = "unix:",
+ .type = Type_Unix
+ }
+};
+
+/**
+ * It is possible to set explicit api name instead of using the
+ * default one.
+ */
+static const char as_api[] = "?as-api=";
+
+/******************************************************************************/
+
+/**
+ * open a unix domain socket for client or server
+ *
+ * @param spec the specification of the path (prefix with @ for abstract)
+ * @param server 0 for client, server otherwise
+ *
+ * @return the file descriptor number of the socket or -1 in case of error
+ */
static int open_unix(const char *spec, int server)
{
int fd, rc, abstract;
@@ -82,21 +150,29 @@ static int open_unix(const char *spec, int server)
return fd;
}
-static int open_inet(const char *spec, int server)
+/**
+ * open a tcp socket for client or server
+ *
+ * @param spec the specification of the host:port/...
+ * @param server 0 for client, server otherwise
+ *
+ * @return the file descriptor number of the socket or -1 in case of error
+ */
+static int open_tcp(const char *spec, int server)
{
int rc, fd;
- const char *service, *host, *api;
+ const char *service, *host, *tail;
struct addrinfo hint, *rai, *iai;
/* scan the uri */
- api = strrchr(spec, '/');
- service = strrchr(spec, ':');
- if (api == NULL || service == NULL || api < service) {
+ tail = strchr(spec, '/');
+ service = strchr(spec, ':');
+ if (tail == NULL || service == NULL || tail < service) {
errno = EINVAL;
return -1;
}
host = strndupa(spec, service++ - spec);
- service = strndupa(service, api - service);
+ service = strndupa(service, tail - service);
/* get addr */
memset(&hint, 0, sizeof hint);
@@ -130,6 +206,13 @@ static int open_inet(const char *spec, int server)
return -1;
}
+/**
+ * open a systemd socket for server
+ *
+ * @param spec the specification of the systemd name
+ *
+ * @return the file descriptor number of the socket or -1 in case of error
+ */
static int open_systemd(const char *spec)
{
#if defined(NO_SYSTEMD_ACTIVATION)
@@ -142,70 +225,55 @@ static int open_systemd(const char *spec)
/******************************************************************************/
-enum type {
- Type_Inet,
- Type_Systemd,
- Type_Unix
-};
-
-struct entry
-{
- const char *prefix;
- unsigned type: 2;
- unsigned noreuseaddr: 1;
- unsigned nolisten: 1;
-};
-
-static struct entry entries[] = { /* default at first place */
- {
- .prefix = "tcp:",
- .type = Type_Inet
- },
- {
- .prefix = "sd:",
- .type = Type_Systemd,
- .noreuseaddr = 1,
- .nolisten = 1
- },
- {
- .prefix = "unix:",
- .type = Type_Unix
- }
-};
-
-/******************************************************************************/
-
-/* get the entry of the uri by searching to its prefix */
+/**
+ * Get the entry of the uri by searching to its prefix
+ *
+ * @param uri the searched uri
+ * @param offset where to store the prefix length
+ *
+ * @return the found entry or the default one
+ */
static struct entry *get_entry(const char *uri, int *offset)
{
- int l, search = 1, i = (int)(sizeof entries / sizeof * entries);
+ int l, i = (int)(sizeof entries / sizeof * entries);
- while (search) {
+ for (;;) {
if (!i) {
l = 0;
- search = 0;
- } else {
- i--;
- l = (int)strlen(entries[i].prefix);
- search = strncmp(uri, entries[i].prefix, l);
+ break;
}
+ i--;
+ l = (int)strlen(entries[i].prefix);
+ if (!strncmp(uri, entries[i].prefix, l))
+ break;
}
*offset = l;
return &entries[i];
}
-static int open_any(const char *uri, int server)
+/**
+ * open socket for client or server
+ *
+ * @param uri the specification of the socket
+ * @param server 0 for client, server otherwise
+ *
+ * @return the file descriptor number of the socket or -1 in case of error
+ */
+static int open_uri(const char *uri, int server)
{
int fd, rc, offset;
struct entry *e;
+ const char *api;
/* search for the entry */
e = get_entry(uri, &offset);
/* get the names */
-
uri += offset;
+ api = strstr(uri, as_api);
+ if (api)
+ uri = strndupa(uri, api - uri);
/* open the socket */
switch (e->type) {
@@ -213,10 +281,15 @@ static int open_any(const char *uri, int server)
fd = open_unix(uri, server);
break;
case Type_Inet:
- fd = open_inet(uri, server);
+ fd = open_tcp(uri, server);
break;
case Type_Systemd:
- fd = open_systemd(uri);
+ if (server)
+ fd = open_systemd(uri);
+ else {
+ errno = EINVAL;
+ fd = -1;
+ }
break;
default:
errno = EAFNOSUPPORT;
@@ -240,25 +313,73 @@ static int open_any(const char *uri, int server)
return fd;
}
-struct fdev *afb_socket_open(const char *uri, int server)
+/**
+ * open socket for client or server
+ *
+ * @param uri the specification of the socket
+ * @param server 0 for client, server otherwise
+ *
+ * @return the file descriptor number of the socket or -1 in case of error
+ */
+int afb_socket_open(const char *uri, int server)
{
- int fd;
- struct fdev *fdev;
-
- fd = open_any(uri, server);
+ int fd = open_uri(uri, server);
if (fd < 0)
- goto error;
+ ERROR("can't open %s socket for %s", server ? "server" : "client", uri);
+ return fd;
+}
- fdev = afb_fdev_create(fd);
- if (!fdev)
- goto error2;
+/**
+ * open socket for client or server
+ *
+ * @param uri the specification of the socket
+ * @param server 0 for client, server otherwise
+ *
+ * @return the fdev of the socket or NULL in case of error
+ */
+struct fdev *afb_socket_open_fdev(const char *uri, int server)
+{
+ struct fdev *fdev;
+ int fd;
+ fd = afb_socket_open(uri, server);
+ if (fd < 0)
+ fdev = NULL;
+ else {
+ fdev = afb_fdev_create(fd);
+ if (!fdev) {
+ close(fd);
+ ERROR("can't make %s socket for %s", server ? "server" : "client", uri);
+ }
+ }
return fdev;
-
-error2:
- close(fd);
-error:
- ERROR("can't make %s socket for %s", server ? "server" : "client", uri);
- return NULL;
}
+/**
+ * Get the api name of the uri
+ *
+ * @param uri the specification of the socket
+ *
+ * @return the api name or NULL if none can be deduced
+ */
+const char *afb_socket_api(const char *uri)
+{
+ int offset;
+ const char *api;
+
+ get_entry(uri, &offset);
+ uri += offset;
+ api = strstr(uri, as_api);
+ if (api)
+ api += sizeof as_api - 1;
+ else {
+ api = strrchr(uri, '/');
+ if (api)
+ api++;
+ else
+ api = uri;
+ if (strchr(api, ':'))
+ api = NULL;
+ }
+ return api;
+}
diff --git a/src/afb-socket.h b/src/afb-socket.h
index dff922b8..d3932ffb 100644
--- a/src/afb-socket.h
+++ b/src/afb-socket.h
@@ -19,4 +19,8 @@
struct fdev;
-extern struct fdev *afb_socket_open(const char *uri, int server);
+extern int afb_socket_open(const char *uri, int server);
+
+extern struct fdev *afb_socket_open_fdev(const char *uri, int server);
+
+extern const char *afb_socket_api(const char *uri);