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lynxis lazus gerrit-no-reply at lists.osmocom.orglynxis lazus has submitted this change. ( https://gerrit.osmocom.org/c/libosmocore/+/19143 )
Change subject: socket: introduce osmo_sock_init_osa & osmo_sock_init_osa_ofd
......................................................................
socket: introduce osmo_sock_init_osa & osmo_sock_init_osa_ofd
osmo_sock_init_osa() takes osmo_sockaddr* as local and remote endpoints
to setup a socket.
Change-Id: I1eece543e3241ef0e095eb63bb831f7c15a16794
---
M include/osmocom/core/socket.h
M src/socket.c
M tests/socket/socket_test.c
M tests/socket/socket_test.err
M tests/socket/socket_test.ok
5 files changed, 310 insertions(+), 0 deletions(-)
Approvals:
Jenkins Builder: Verified
laforge: Looks good to me, but someone else must approve
pespin: Looks good to me, but someone else must approve
lynxis lazus: Looks good to me, approved
diff --git a/include/osmocom/core/socket.h b/include/osmocom/core/socket.h
index e6a6bd5..4441449 100644
--- a/include/osmocom/core/socket.h
+++ b/include/osmocom/core/socket.h
@@ -58,6 +58,11 @@
const char **local_hosts, size_t local_hosts_cnt, uint16_t local_port,
const char **remote_hosts, size_t remote_hosts_cnt, uint16_t remote_port, unsigned int flags);
+int osmo_sock_init_osa(uint16_t type, uint8_t proto,
+ const struct osmo_sockaddr *local,
+ const struct osmo_sockaddr *remote,
+ unsigned int flags);
+
int osmo_sock_init_ofd(struct osmo_fd *ofd, int family, int type, int proto,
const char *host, uint16_t port, unsigned int flags);
@@ -65,6 +70,11 @@
const char *local_host, uint16_t local_port,
const char *remote_host, uint16_t remote_port, unsigned int flags);
+int osmo_sock_init_osa_ofd(struct osmo_fd *ofd, int type, int proto,
+ const struct osmo_sockaddr *local,
+ const struct osmo_sockaddr *remote,
+ unsigned int flags);
+
int osmo_sock_init_sa(struct sockaddr *ss, uint16_t type,
uint8_t proto, unsigned int flags);
diff --git a/src/socket.c b/src/socket.c
index 56f01dc..6c06063 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -34,6 +34,7 @@
#include <osmocom/core/logging.h>
#include <osmocom/core/select.h>
#include <osmocom/core/socket.h>
+#include <osmocom/core/sockaddr_str.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/utils.h>
@@ -153,6 +154,28 @@
return sfd;
}
+static int socket_helper_osa(const struct osmo_sockaddr *addr, uint16_t type, uint8_t proto, unsigned int flags)
+{
+ int sfd, on = 1;
+
+ sfd = socket(addr->u.sa.sa_family, type, proto);
+ if (sfd == -1) {
+ LOGP(DLGLOBAL, LOGL_ERROR,
+ "unable to create socket: %s\n", strerror(errno));
+ return sfd;
+ }
+ if (flags & OSMO_SOCK_F_NONBLOCK) {
+ if (ioctl(sfd, FIONBIO, (unsigned char *)&on) < 0) {
+ LOGP(DLGLOBAL, LOGL_ERROR,
+ "cannot set this socket unblocking: %s\n",
+ strerror(errno));
+ close(sfd);
+ sfd = -EINVAL;
+ }
+ }
+ return sfd;
+}
+
#ifdef HAVE_LIBSCTP
/* Fill buf with a string representation of the address set, in the form:
* buf_len == 0: "()"
@@ -434,6 +457,135 @@
return sfd;
}
+#define _SOCKADDR_TO_STR(dest, sockaddr) do { \
+ if (osmo_sockaddr_str_from_sockaddr(&dest, &sockaddr->u.sas)) \
+ osmo_strlcpy(dest.ip, "Invalid IP", 11); \
+ } while (0)
+
+/*! Initialize a socket (including bind and/or connect)
+ * \param[in] family Address Family like AF_INET, AF_INET6, AF_UNSPEC
+ * \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
+ * \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
+ * \param[in] local local address
+ * \param[in] remote remote address
+ * \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
+ * \returns socket file descriptor on success; negative on error
+ *
+ * This function creates a new socket of the
+ * \a type and \a proto and optionally binds it to the \a local
+ * as well as optionally connects it to the \a remote
+ * depending on the value * of \a flags parameter.
+ *
+ * As opposed to \ref osmo_sock_init(), this function allows to combine
+ * the \ref OSMO_SOCK_F_BIND and \ref OSMO_SOCK_F_CONNECT flags. This
+ * is useful if you want to connect to a remote host/port, but still
+ * want to bind that socket to either a specific local alias IP and/or a
+ * specific local source port.
+ *
+ * You must specify either \ref OSMO_SOCK_F_BIND, or \ref
+ * OSMO_SOCK_F_CONNECT, or both.
+ *
+ * If \ref OSMO_SOCK_F_NONBLOCK is specified, the socket will be set to
+ * non-blocking mode.
+ */
+int osmo_sock_init_osa(uint16_t type, uint8_t proto,
+ const struct osmo_sockaddr *local,
+ const struct osmo_sockaddr *remote,
+ unsigned int flags)
+{
+ int sfd = -1, rc, on = 1;
+ struct osmo_sockaddr_str sastr = {};
+
+ if ((flags & (OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT)) == 0) {
+ LOGP(DLGLOBAL, LOGL_ERROR, "invalid: you have to specify either "
+ "BIND or CONNECT flags\n");
+ return -EINVAL;
+ }
+
+ if ((flags & OSMO_SOCK_F_BIND) && !local) {
+ LOGP(DLGLOBAL, LOGL_ERROR, "invalid argument. Cannot BIND when local is NULL\n");
+ return -EINVAL;
+ }
+
+ if ((flags & OSMO_SOCK_F_CONNECT) && !remote) {
+ LOGP(DLGLOBAL, LOGL_ERROR, "invalid argument. Cannot CONNECT when remote is NULL\n");
+ return -EINVAL;
+ }
+
+ if ((flags & OSMO_SOCK_F_BIND) &&
+ (flags & OSMO_SOCK_F_CONNECT) &&
+ local->u.sa.sa_family != remote->u.sa.sa_family) {
+ LOGP(DLGLOBAL, LOGL_ERROR, "invalid: the family for "
+ "local and remote endpoint must be same.\n");
+ return -EINVAL;
+ }
+
+ /* figure out local side of socket */
+ if (flags & OSMO_SOCK_F_BIND) {
+ sfd = socket_helper_osa(local, type, proto, flags);
+ if (sfd < 0) {
+ _SOCKADDR_TO_STR(sastr, local);
+ LOGP(DLGLOBAL, LOGL_ERROR, "no suitable local addr found for: %s:%u\n",
+ sastr.ip, sastr.port);
+ return -ENODEV;
+ }
+
+ if (proto != IPPROTO_UDP || (flags & OSMO_SOCK_F_UDP_REUSEADDR)) {
+ rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
+ &on, sizeof(on));
+ if (rc < 0) {
+ _SOCKADDR_TO_STR(sastr, local);
+ LOGP(DLGLOBAL, LOGL_ERROR,
+ "cannot setsockopt socket:"
+ " %s:%u: %s\n",
+ sastr.ip, sastr.port,
+ strerror(errno));
+ close(sfd);
+ return rc;
+ }
+ }
+
+ if (bind(sfd, &local->u.sa, sizeof(struct osmo_sockaddr)) == -1) {
+ _SOCKADDR_TO_STR(sastr, local);
+ LOGP(DLGLOBAL, LOGL_ERROR, "unable to bind socket: %s:%u: %s\n",
+ sastr.ip, sastr.port, strerror(errno));
+ close(sfd);
+ return -1;
+ }
+ }
+
+ /* Reached this point, if OSMO_SOCK_F_BIND then sfd is valid (>=0) or it
+ was already closed and func returned. If OSMO_SOCK_F_BIND is not
+ set, then sfd = -1 */
+
+ /* figure out remote side of socket */
+ if (flags & OSMO_SOCK_F_CONNECT) {
+ if (sfd < 0) {
+ sfd = socket_helper_osa(remote, type, proto, flags);
+ if (sfd < 0) {
+ return sfd;
+ }
+ }
+
+ rc = connect(sfd, &remote->u.sa, sizeof(struct osmo_sockaddr));
+ if (rc != 0 && errno != EINPROGRESS) {
+ _SOCKADDR_TO_STR(sastr, remote);
+ LOGP(DLGLOBAL, LOGL_ERROR, "unable to connect socket: %s:%u: %s\n",
+ sastr.ip, sastr.port, strerror(errno));
+ close(sfd);
+ return rc;
+ }
+ }
+
+ rc = osmo_sock_init_tail(sfd, type, flags);
+ if (rc < 0) {
+ close(sfd);
+ sfd = -1;
+ }
+
+ return sfd;
+}
+
#ifdef HAVE_LIBSCTP
/* Check whether there's an IPv6 Addr as first option of any addrinfo item in the addrinfo set */
@@ -860,6 +1012,13 @@
local_port, remote_host, remote_port, flags));
}
+int osmo_sock_init_osa_ofd(struct osmo_fd *ofd, int type, int proto,
+ const struct osmo_sockaddr *local,
+ const struct osmo_sockaddr *remote, unsigned int flags)
+{
+ return osmo_fd_init_ofd(ofd, osmo_sock_init_osa(type, proto, local, remote, flags));
+}
+
/*! Initialize a socket and fill \ref sockaddr
* \param[out] ss socket address (will be filled in)
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
diff --git a/tests/socket/socket_test.c b/tests/socket/socket_test.c
index 64e48bc..671177f 100644
--- a/tests/socket/socket_test.c
+++ b/tests/socket/socket_test.c
@@ -186,6 +186,133 @@
return 0;
}
+static int test_sockinit_osa(void)
+{
+ int fd, rc;
+ char *name;
+
+ struct osmo_sockaddr localhost4 = {};
+ struct osmo_sockaddr localhost6 = {};
+ struct osmo_sockaddr localhost4_noport = {};
+ struct osmo_sockaddr localhost6_noport = {};
+ struct osmo_sockaddr any4 = {};
+ struct osmo_sockaddr any6 = {};
+ struct osmo_sockaddr invalid = {};
+
+ localhost4.u.sin = (struct sockaddr_in){
+ .sin_family = AF_INET,
+ .sin_addr.s_addr = inet_addr("127.0.0.1"),
+ .sin_port = htons(42),
+ };
+
+ localhost6.u.sin6 = (struct sockaddr_in6){
+ .sin6_family = AF_INET6,
+ .sin6_port = htons(42),
+ };
+ inet_pton(AF_INET6, "::1", &localhost6.u.sin6.sin6_addr);
+
+ localhost4_noport = localhost4;
+ localhost4_noport.u.sin.sin_port = htons(0);
+ localhost6_noport = localhost6;
+ localhost6_noport.u.sin6.sin6_port = htons(0);
+
+ any4.u.sin = (struct sockaddr_in){
+ .sin_family = AF_INET,
+ .sin_addr.s_addr = inet_addr("0.0.0.0"),
+ .sin_port = htons(0),
+ };
+ any6.u.sin6 = (struct sockaddr_in6){
+ .sin6_family = AF_INET6,
+ .sin6_port = htons(0),
+ };
+ inet_pton(AF_INET6, "::", &any6.u.sin6.sin6_addr);
+
+ invalid.u.sa.sa_family = AF_UNSPEC;
+
+ printf("Checking osmo_sock_init_osa() with bind to a random local UDP port\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP,
+ &any4, NULL, OSMO_SOCK_F_BIND);
+ OSMO_ASSERT(fd >= 0);
+ name = osmo_sock_get_name(ctx, fd);
+ /* expect it to be not connected. We cannot match on INADDR_ANY,
+ * as apparently that won't work on FreeBSD if there's only one
+ * address (e.g. 137.0.0.1) assigned to the entire system, like
+ * the Osmocom FreeBSD build slaves */
+ OSMO_ASSERT(!strncmp(name, "(r=NULL<->", 9));
+ talloc_free(name);
+ /* expect it to be blocking */
+ rc = fcntl(fd, F_GETFL);
+ OSMO_ASSERT(!(rc & O_NONBLOCK));
+ close(fd);
+
+ printf("Checking osmo_sock_init_osa() IPv4 for OSMO_SOCK_F_NONBLOCK\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP,
+ &any4, NULL, OSMO_SOCK_F_BIND|OSMO_SOCK_F_NONBLOCK);
+ OSMO_ASSERT(fd >= 0);
+ /* expect it to be blocking */
+ rc = fcntl(fd, F_GETFL);
+ OSMO_ASSERT(rc & O_NONBLOCK);
+ close(fd);
+
+ printf("Checking osmo_sock_init_osa() IPv6 for OSMO_SOCK_F_NONBLOCK\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP,
+ &any6, NULL, OSMO_SOCK_F_BIND|OSMO_SOCK_F_NONBLOCK);
+ OSMO_ASSERT(fd >= 0);
+ /* expect it to be blocking */
+ rc = fcntl(fd, F_GETFL);
+ OSMO_ASSERT(rc & O_NONBLOCK);
+ close(fd);
+
+ printf("Checking osmo_sock_init_osa() for invalid flags\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP, &any4, NULL, 0);
+ OSMO_ASSERT(fd < 0);
+
+ printf("Checking osmo_sock_init_osa() for combined BIND + CONNECT on IPv4\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP, &localhost4_noport, &localhost4,
+ OSMO_SOCK_F_BIND|OSMO_SOCK_F_CONNECT);
+ OSMO_ASSERT(fd >= 0);
+ name = osmo_sock_get_name(ctx, fd);
+#ifndef __FreeBSD__
+ /* For some reason, on the jenkins.osmocom.org build slave with
+ * FreeBSD 10 inside a jail, it fails. Works fine on laforge's
+ * FreeBSD 10 or 11 VM at home */
+ OSMO_ASSERT(!strncmp(name, "(r=127.0.0.1:42<->l=127.0.0.1", 29));
+#endif
+ close(fd);
+
+ printf("Checking osmo_sock_init_osa() for combined BIND + CONNECT on IPv6\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP, &localhost6_noport, &localhost6,
+ OSMO_SOCK_F_BIND|OSMO_SOCK_F_CONNECT);
+ OSMO_ASSERT(fd >= 0);
+ name = osmo_sock_get_name(ctx, fd);
+#ifndef __FreeBSD__
+ /* For some reason, on the jenkins.osmocom.org build slave with
+ * FreeBSD 10 inside a jail, it fails. Works fine on laforge's
+ * FreeBSD 10 or 11 VM at home */
+ OSMO_ASSERT(!strncmp(name, "(r=::1:42<->l=::1", 17));
+#endif
+ close(fd);
+
+ printf("Checking osmo_sock_init_osa() must fail on mixed IPv4 & IPv6\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP, &localhost4_noport, &localhost6,
+ OSMO_SOCK_F_BIND|OSMO_SOCK_F_CONNECT);
+ OSMO_ASSERT(fd < 0);
+
+ printf("Checking osmo_sock_init_osa() must fail on mixed IPv6 & IPv4\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP, &localhost6_noport, &localhost4,
+ OSMO_SOCK_F_BIND|OSMO_SOCK_F_CONNECT);
+ OSMO_ASSERT(fd < 0);
+
+ printf("Checking osmo_sock_init_osa() must fail on invalid osmo_sockaddr\n");
+ fd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP, &invalid, &localhost4,
+ OSMO_SOCK_F_BIND|OSMO_SOCK_F_CONNECT);
+ OSMO_ASSERT(fd < 0);
+
+ talloc_free(name);
+
+ return 0;
+}
+
const struct log_info_cat default_categories[] = {
};
@@ -204,6 +331,7 @@
test_sockinit();
test_sockinit2();
test_get_ip_and_port();
+ test_sockinit_osa();
return EXIT_SUCCESS;
}
diff --git a/tests/socket/socket_test.err b/tests/socket/socket_test.err
index 0f0f8da..3c198ac 100644
--- a/tests/socket/socket_test.err
+++ b/tests/socket/socket_test.err
@@ -2,3 +2,7 @@
invalid: you have to specify either BIND or CONNECT flags
Unable to find a common protocol (IPv4 or IPv6) for local host: 127.0.0.1 and remote host: ::1.
Unable to find a common protocol (IPv4 or IPv6) for local host: ::1 and remote host: 127.0.0.1.
+invalid: you have to specify either BIND or CONNECT flags
+invalid: the family for local and remote endpoint must be same.
+invalid: the family for local and remote endpoint must be same.
+invalid: the family for local and remote endpoint must be same.
diff --git a/tests/socket/socket_test.ok b/tests/socket/socket_test.ok
index 589036f..9a52d44 100644
--- a/tests/socket/socket_test.ok
+++ b/tests/socket/socket_test.ok
@@ -12,3 +12,12 @@
Checking osmo_sock_init2(AF_UNSPEC) BIND on IPv4
Checking test_get_ip_and_port() for combined BIND + CONNECT on IPv4
Checking test_get_ip_and_port() for combined BIND + CONNECT on IPv6
+Checking osmo_sock_init_osa() with bind to a random local UDP port
+Checking osmo_sock_init_osa() IPv4 for OSMO_SOCK_F_NONBLOCK
+Checking osmo_sock_init_osa() IPv6 for OSMO_SOCK_F_NONBLOCK
+Checking osmo_sock_init_osa() for invalid flags
+Checking osmo_sock_init_osa() for combined BIND + CONNECT on IPv4
+Checking osmo_sock_init_osa() for combined BIND + CONNECT on IPv6
+Checking osmo_sock_init_osa() must fail on mixed IPv4 & IPv6
+Checking osmo_sock_init_osa() must fail on mixed IPv6 & IPv4
+Checking osmo_sock_init_osa() must fail on invalid osmo_sockaddr
--
To view, visit https://gerrit.osmocom.org/c/libosmocore/+/19143
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: I1eece543e3241ef0e095eb63bb831f7c15a16794
Gerrit-Change-Number: 19143
Gerrit-PatchSet: 20
Gerrit-Owner: lynxis lazus <lynxis at fe80.eu>
Gerrit-Assignee: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-Reviewer: lynxis lazus <lynxis at fe80.eu>
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-CC: neels <nhofmeyr at sysmocom.de>
Gerrit-MessageType: merged
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