X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fsocket.c;h=e96636ae7fa4198774ee14e5b2ac8c4e53d703b5;hb=647d2ea11cccea1e96629142abbe25de8ef1c7b5;hp=7a291346b7bb4d4f0f39f8cc728899441407c488;hpb=cdb19ec1642636497881215a69166fd5f1d0cda2;p=deb_libnfs.git
diff --git a/lib/socket.c b/lib/socket.c
index 7a29134..e96636a 100644
--- a/lib/socket.c
+++ b/lib/socket.c
@@ -15,6 +15,9 @@
along with this program; if not, see .
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#include
#include
#include
@@ -25,12 +28,23 @@
#include
#include
#include
+#ifdef HAVE_SYS_FILIO_H
+#include
+#endif
+#ifdef HAVE_SYS_SOCKIO_H
+#include
+#endif
#include
+#include
+#include
+#include
#include "libnfs.h"
#include "libnfs-raw.h"
#include "libnfs-private.h"
#include "slist.h"
+static int rpc_disconnect_requeue(struct rpc_context *rpc);
+
static void set_nonblocking(int fd)
{
unsigned v;
@@ -47,6 +61,11 @@ int rpc_which_events(struct rpc_context *rpc)
{
int events = rpc->is_connected ? POLLIN : POLLOUT;
+ if (rpc->is_udp != 0) {
+ /* for udp sockets we only wait for pollin */
+ return POLLIN;
+ }
+
if (rpc->outqueue) {
events |= POLLOUT;
}
@@ -106,6 +125,29 @@ static int rpc_read_from_socket(struct rpc_context *rpc)
return -1;
}
+ if (rpc->is_udp) {
+ char *buf;
+ socklen_t socklen = sizeof(rpc->udp_src);
+
+ buf = malloc(available);
+ if (buf == NULL) {
+ rpc_set_error(rpc, "Failed to malloc buffer for recvfrom");
+ return -1;
+ }
+ count = recvfrom(rpc->fd, buf, available, MSG_DONTWAIT, (struct sockaddr *)&rpc->udp_src, &socklen);
+ if (count < 0) {
+ rpc_set_error(rpc, "Failed recvfrom: %s", strerror(errno));
+ free(buf);
+ }
+ if (rpc_process_pdu(rpc, buf, count) != 0) {
+ rpc_set_error(rpc, "Invalid/garbage pdu received from server. Ignoring PDU");
+ free(buf);
+ return -1;
+ }
+ free(buf);
+ return 0;
+ }
+
/* read record marker, 4 bytes at the beginning of every pdu */
if (rpc->inbuf == NULL) {
rpc->insize = 4;
@@ -230,16 +272,16 @@ int rpc_service(struct rpc_context *rpc, int revents)
return 0;
}
- if (revents & POLLOUT && rpc->outqueue != NULL) {
- if (rpc_write_to_socket(rpc) != 0) {
- rpc_set_error(rpc, "write to socket failed");
- return -1;
+ if (revents & POLLIN) {
+ if (rpc_read_from_socket(rpc) != 0) {
+ rpc_disconnect_requeue(rpc);
+ return 0;
}
}
- if (revents & POLLIN) {
- if (rpc_read_from_socket(rpc) != 0) {
- rpc_disconnect(rpc, rpc_get_error(rpc));
+ if (revents & POLLOUT && rpc->outqueue != NULL) {
+ if (rpc_write_to_socket(rpc) != 0) {
+ rpc_set_error(rpc, "write to socket failed");
return -1;
}
}
@@ -259,6 +301,11 @@ int rpc_connect_async(struct rpc_context *rpc, const char *server, int port, rpc
return -1;
}
+ if (rpc->is_udp != 0) {
+ rpc_set_error(rpc, "Trying to connect on UDP socket");
+ return -1;
+ }
+
sin->sin_family = AF_INET;
sin->sin_port = htons(port);
if (inet_pton(AF_INET, server, &sin->sin_addr) != 1) {
@@ -269,7 +316,7 @@ int rpc_connect_async(struct rpc_context *rpc, const char *server, int port, rpc
switch (s.ss_family) {
case AF_INET:
socksize = sizeof(struct sockaddr_in);
-#ifdef HAVE_SOCK_SIN_LEN
+#ifdef HAVE_SOCKADDR_LEN
sin->sin_len = socksize;
#endif
rpc->fd = socket(AF_INET, SOCK_STREAM, 0);
@@ -307,3 +354,110 @@ int rpc_disconnect(struct rpc_context *rpc, char *error)
return 0;
}
+
+/* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue */
+static int rpc_disconnect_requeue(struct rpc_context *rpc)
+{
+ struct rpc_pdu *pdu;
+
+ if (rpc->fd != -1) {
+ close(rpc->fd);
+ }
+ rpc->fd = -1;
+
+ rpc->is_connected = 0;
+
+ /* socket is closed so we will not get any replies to any commands
+ * in flight. Move them all over from the waitpdu queue back to the out queue
+ */
+ for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) {
+ SLIST_REMOVE(&rpc->waitpdu, pdu);
+ SLIST_ADD(&rpc->outqueue, pdu);
+ }
+
+ return 0;
+}
+
+
+int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port)
+{
+ struct addrinfo *ai = NULL;
+ char service[6];
+
+ if (rpc->is_udp == 0) {
+ rpc_set_error(rpc, "Cant not bind UDP. Not UDP context");
+ return -1;
+ }
+
+ snprintf(service, 6, "%d", port);
+ if (getaddrinfo(addr, service, NULL, &ai) != 0) {
+ rpc_set_error(rpc, "Invalid address:%s. "
+ "Can not resolv into IPv4/v6 structure.");
+ return -1;
+ }
+
+ switch(ai->ai_family) {
+ case AF_INET:
+ rpc->fd = socket(ai->ai_family, SOCK_DGRAM, 0);
+ if (rpc->fd == -1) {
+ rpc_set_error(rpc, "Failed to create UDP socket: %s", strerror(errno));
+ freeaddrinfo(ai);
+ return -1;
+ }
+
+ if (bind(rpc->fd, (struct sockaddr *)ai->ai_addr, sizeof(struct sockaddr_in)) != 0) {
+ rpc_set_error(rpc, "Failed to bind to UDP socket: %s",strerror(errno));
+ freeaddrinfo(ai);
+ return -1;
+ }
+ break;
+ default:
+ rpc_set_error(rpc, "Can not handle UPD sockets of family %d yet", ai->ai_family);
+ freeaddrinfo(ai);
+ return -1;
+ }
+
+ freeaddrinfo(ai);
+
+ return 0;
+}
+
+int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast)
+{
+ struct addrinfo *ai = NULL;
+ char service[6];
+
+ if (rpc->is_udp == 0) {
+ rpc_set_error(rpc, "Can not set destination sockaddr. Not UDP context");
+ return -1;
+ }
+
+ snprintf(service, 6, "%d", port);
+ if (getaddrinfo(addr, service, NULL, &ai) != 0) {
+ rpc_set_error(rpc, "Invalid address:%s. "
+ "Can not resolv into IPv4/v6 structure.");
+ return -1;
+ }
+
+ if (rpc->udp_dest) {
+ free(rpc->udp_dest);
+ rpc->udp_dest = NULL;
+ }
+ rpc->udp_dest = malloc(ai->ai_addrlen);
+ if (rpc->udp_dest == NULL) {
+ rpc_set_error(rpc, "Out of memory. Failed to allocate sockaddr structure");
+ return -1;
+ }
+ memcpy(rpc->udp_dest, ai->ai_addr, ai->ai_addrlen);
+ freeaddrinfo(ai);
+
+ rpc->is_broadcast = is_broadcast;
+ setsockopt(rpc->fd, SOL_SOCKET, SO_BROADCAST, &is_broadcast, sizeof(is_broadcast));
+
+ return 0;
+}
+
+struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc)
+{
+ return (struct sockaddr *)&rpc->udp_src;
+}