[PATCH bpf-next v11 7/9] selftests/bpf: Add connect_fd_to_addr_str helper

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From: Geliang Tang <tanggeliang@xxxxxxxxxx>

Similar to connect_fd_to_fd() helper to connect from a client fd to a
server fd, this patch adds a new helper connect_fd_to_addr_str() to connect
from a client fd to a server address. It accepts the server address string
"addr_str", together with the server family, type and port, as parameters
instead of using a "server_fd" like connect_fd_to_fd().

Signed-off-by: Geliang Tang <tanggeliang@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/network_helpers.c | 21 +++++++++++++++++++
 tools/testing/selftests/bpf/network_helpers.h |  3 +++
 2 files changed, 24 insertions(+)

diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c
index e0cba4178e41..9758e707b859 100644
--- a/tools/testing/selftests/bpf/network_helpers.c
+++ b/tools/testing/selftests/bpf/network_helpers.c
@@ -388,6 +388,27 @@ int connect_fd_to_fd(int client_fd, int server_fd, int timeout_ms)
 	return 0;
 }
 
+int connect_fd_to_addr_str(int client_fd, int family, int type,
+			   const char *addr_str, __u16 port,
+			   const struct network_helper_opts *opts)
+{
+	struct sockaddr_storage addr;
+	socklen_t len;
+
+	if (!opts)
+		opts = &default_opts;
+
+	if (settimeo(client_fd, opts->timeout_ms))
+		return -1;
+
+	if (make_sockaddr(family, addr_str, port, &addr, &len)) {
+		log_err("Failed to make server addr");
+		return -1;
+	}
+
+	return connect_fd_to_addr(client_fd, &addr, len, false);
+}
+
 int make_sockaddr(int family, const char *addr_str, __u16 port,
 		  struct sockaddr_storage *addr, socklen_t *len)
 {
diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h
index 4f26bfc2dbf5..43526271366f 100644
--- a/tools/testing/selftests/bpf/network_helpers.h
+++ b/tools/testing/selftests/bpf/network_helpers.h
@@ -67,6 +67,9 @@ int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t len
 int connect_to_fd(int server_fd, int timeout_ms);
 int connect_to_fd_opts(int server_fd, int type, const struct network_helper_opts *opts);
 int connect_fd_to_fd(int client_fd, int server_fd, int timeout_ms);
+int connect_fd_to_addr_str(int client_fd, int family, int type,
+			   const char *addr_str, __u16 port,
+			   const struct network_helper_opts *opts);
 int fastopen_connect(int server_fd, const char *data, unsigned int data_len,
 		     int timeout_ms);
 int make_sockaddr(int family, const char *addr_str, __u16 port,
-- 
2.43.0





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