net: implement IP_LOCAL_PORT_RANGE socket option decodingesyr/ip-local-port-range

Introduced by Linux kernel commit v6.3-rc1~162^2~206^2~1.

* src/net.c (+print_port_range): New function.
(print_getsockopt) <case SOL_IP> <case IP_LOCAL_PORT_RANGE>: Call it.
(print_setsockopt) <case SOL_IP> <case IP_LOCAL_PORT_RANGE>: Ditto.
* tests/.gitignore: Add ip_local_port_range, ip_local_port_range-Xabbrev,
ip_local_port_range-Xraw, ip_local_port_range-Xverbose,
ip_local_port_range-success, ip_local_port_range-success-Xabbrev,
ip_local_port_range-success-Xraw,
and ip_local_port_range-success-Xverbose.
* tests/Makefile.am (check_PROGRAMS): Add ip_local_port_range-success,
ip_local_port_range-success-Xabbrev, ip_local_port_range-success-Xraw,
and ip_local_port_range-success-Xverbose.
* tests/gen_tests.in (ip_local_port_range, ip_local_port_range-Xabbrev,
ip_local_port_range-Xraw, ip_local_port_range-Xverbose,
ip_local_port_range-success, ip_local_port_range-success-Xabbrev,
ip_local_port_range-success-Xraw, ip_local_port_range-success-Xverbose):
New tests.
* tests/pure_executables.list: Add ip_local_port_range,
ip_local_port_range-Xabbrev, ip_local_port_range-Xraw,
and ip_local_port_range-Xverbose.
* tests/ip_local_port_range.c: New file.
* tests/ip_local_port_range-Xabbrev.c: Likewise.
* tests/ip_local_port_range-Xraw.c: Likewise.
* tests/ip_local_port_range-Xverbose.c: Likewise.
* tests/ip_local_port_range-success-Xabbrev.c: Likewise.
* tests/ip_local_port_range-success-Xraw.c: Likewise.
* tests/ip_local_port_range-success-Xverbose.c: Likewise.
* tests/ip_local_port_range-success.c: Likewise.
* NEWS: Mention it.

14 files changed, 263 insertions, 1 deletions

diff --git a/NEWS b/NEWS
index 964b868e6..c7798adf0 100644
--- a/NEWS
+++ b/NEWS
@@ -8,10 +8,11 @@ Noteworthy changes in release ?.? (????-??-??)
     after capturing the specified number of syscalls.
   * Implemented decoding of PR_GET_MDWE and PR_SET_MDWE operations of prctl
     syscall.
+  * Implemented decoding of IP_LOCAL_PORT_RANGE socket option.
   * Implemented decoding of IFLA_BRPORT_MCAST_N_GROUPS,
     IFLA_BRPORT_MCAST_MAX_GROUPS, IFLA_GSO_IPV4_MAX_SIZE,
     IFLA_GRO_IPV4_MAX_SIZE, and TCA_EXT_WARN_MSG netlink attributes.
-  * Updated lists of F_SEAL_*, IFLA_*, IORING_*, IP_*, MFD_*, NFT_*, TCA_*,
+  * Updated lists of F_SEAL_*, IFLA_*, IORING_*, MFD_*, NFT_*, TCA_*,
     and V4L2_PIX_FMT_* constants.
   * Updated lists of ioctl commands from Linux 6.3.
 
diff --git a/src/net.c b/src/net.c
index 01f1c34f8..4c84928b8 100644
--- a/src/net.c
+++ b/src/net.c
@@ -734,6 +734,33 @@ print_txrehash(struct tcb *const tcp, const kernel_ulong_t addr, const int len)
 }
 
 static void
+print_port_range(struct tcb *const tcp, const kernel_ulong_t addr,
+		 const unsigned int len)
+{
+	unsigned int ports;
+
+	if (len != sizeof(ports)) {
+		printstr_ex(tcp, addr, len, QUOTE_FORCE_HEX);
+		return;
+	}
+
+	if (umove_or_printaddr(tcp, addr, &ports))
+		return;
+
+	tprint_indirect_begin();
+	PRINT_VAL_X(ports);
+	if (xlat_verbose(xlat_verbosity) != XLAT_STYLE_RAW) {
+		unsigned short lo = ports & 0xffff;
+		unsigned short hi = ports >> 16;
+
+		if (ports && (!lo || !hi || lo <= hi))
+			tprintf_comment("%.0hu..%.0hu", lo, hi);
+	}
+	tprint_indirect_end();
+}
+
+
+static void
 print_tpacket_stats(struct tcb *const tcp, const kernel_ulong_t addr,
 		    unsigned int len)
 {
@@ -910,6 +937,14 @@ print_getsockopt(struct tcb *const tcp, const unsigned int level,
 		}
 		break;
 
+	case SOL_IP:
+		switch (name) {
+		case IP_LOCAL_PORT_RANGE:
+			print_port_range(tcp, addr, rlen);
+			return;
+		}
+		break;
+
 	case SOL_PACKET:
 		switch (name) {
 		case PACKET_STATISTICS:
@@ -1189,6 +1224,9 @@ print_setsockopt(struct tcb *const tcp, const unsigned int level,
 		case MCAST_LEAVE_GROUP:
 			print_group_req(tcp, addr, len);
 			return;
+		case IP_LOCAL_PORT_RANGE:
+			print_port_range(tcp, addr, len);
+			return;
 		}
 		break;
 
diff --git a/tests/.gitignore b/tests/.gitignore
index a39408627..4c753e324 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -417,6 +417,14 @@ ioprio--pidns-translation
 ioprio-Xabbrev
 ioprio-Xraw
 ioprio-Xverbose
+ip_local_port_range
+ip_local_port_range-Xabbrev
+ip_local_port_range-Xraw
+ip_local_port_range-Xverbose
+ip_local_port_range-success
+ip_local_port_range-success-Xabbrev
+ip_local_port_range-success-Xraw
+ip_local_port_range-success-Xverbose
 ip_mreq
 ipc
 ipc_msg
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 170876eed..f25c2a506 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -242,6 +242,10 @@ check_PROGRAMS = $(PURE_EXECUTABLES) \
 	ioctl_v4l2-success-v-Xraw \
 	ioctl_v4l2-success-v-Xverbose \
 	ioprio--pidns-translation \
+	ip_local_port_range-success \
+	ip_local_port_range-success-Xabbrev \
+	ip_local_port_range-success-Xraw \
+	ip_local_port_range-success-Xverbose \
 	is_linux_mips_n64 \
 	kcmp-y--pidns-translation \
 	kill--pidns-translation \
diff --git a/tests/gen_tests.in b/tests/gen_tests.in
index db70ee1b4..1316ad6e8 100644
--- a/tests/gen_tests.in
+++ b/tests/gen_tests.in
@@ -435,6 +435,14 @@ ioprio--pidns-translation	test_pidns -a18 -e trace=ioprio_get,ioprio_set
 ioprio-Xabbrev	-a18 -e trace=ioprio_get,ioprio_set -Xabbrev
 ioprio-Xraw	-a18 -e trace=ioprio_get,ioprio_set -Xraw
 ioprio-Xverbose	-a18 -e trace=ioprio_get,ioprio_set -Xverbose
+ip_local_port_range			-e trace=getsockopt,setsockopt -a50
+ip_local_port_range-Xabbrev		-e trace=getsockopt,setsockopt -Xabbrev -a50
+ip_local_port_range-Xraw		-e trace=getsockopt,setsockopt -Xraw -a30
+ip_local_port_range-Xverbose		-e trace=getsockopt,setsockopt -Xverbose -a69
+ip_local_port_range-success		-einject=getsockopt,setsockopt:retval=42 -etrace=getsockopt,setsockopt -a50
+ip_local_port_range-success-Xabbrev	-einject=getsockopt,setsockopt:retval=42 -etrace=getsockopt,setsockopt -Xabbrev -a50
+ip_local_port_range-success-Xraw	-einject=getsockopt,setsockopt:retval=42 -etrace=getsockopt,setsockopt -Xraw -a30
+ip_local_port_range-success-Xverbose	-einject=getsockopt,setsockopt:retval=42 -etrace=getsockopt,setsockopt -Xverbose -a69
 ip_mreq	-e trace=setsockopt
 ipc	-a19
 ipc_msg	+ipc.sh -a26
diff --git a/tests/ip_local_port_range-Xabbrev.c b/tests/ip_local_port_range-Xabbrev.c
new file mode 100644
index 000000000..c6e9fa1e6
--- /dev/null
+++ b/tests/ip_local_port_range-Xabbrev.c
@@ -0,0 +1,2 @@
+#define XLAT_ABBREV 1
+#include "ip_local_port_range.c"
diff --git a/tests/ip_local_port_range-Xraw.c b/tests/ip_local_port_range-Xraw.c
new file mode 100644
index 000000000..73faec1c8
--- /dev/null
+++ b/tests/ip_local_port_range-Xraw.c
@@ -0,0 +1,2 @@
+#define XLAT_RAW 1
+#include "ip_local_port_range.c"
diff --git a/tests/ip_local_port_range-Xverbose.c b/tests/ip_local_port_range-Xverbose.c
new file mode 100644
index 000000000..1487b5608
--- /dev/null
+++ b/tests/ip_local_port_range-Xverbose.c
@@ -0,0 +1,2 @@
+#define XLAT_VERBOSE 1
+#include "ip_local_port_range.c"
diff --git a/tests/ip_local_port_range-success-Xabbrev.c b/tests/ip_local_port_range-success-Xabbrev.c
new file mode 100644
index 000000000..da0e11849
--- /dev/null
+++ b/tests/ip_local_port_range-success-Xabbrev.c
@@ -0,0 +1,2 @@
+#define XLAT_ABBREV 1
+#include "ip_local_port_range-success.c"
diff --git a/tests/ip_local_port_range-success-Xraw.c b/tests/ip_local_port_range-success-Xraw.c
new file mode 100644
index 000000000..8c5be6f02
--- /dev/null
+++ b/tests/ip_local_port_range-success-Xraw.c
@@ -0,0 +1,2 @@
+#define XLAT_RAW 1
+#include "ip_local_port_range-success.c"
diff --git a/tests/ip_local_port_range-success-Xverbose.c b/tests/ip_local_port_range-success-Xverbose.c
new file mode 100644
index 000000000..e5e2d2412
--- /dev/null
+++ b/tests/ip_local_port_range-success-Xverbose.c
@@ -0,0 +1,2 @@
+#define XLAT_VERBOSE 1
+#include "ip_local_port_range-success.c"
diff --git a/tests/ip_local_port_range-success.c b/tests/ip_local_port_range-success.c
new file mode 100644
index 000000000..9e4c28ab2
--- /dev/null
+++ b/tests/ip_local_port_range-success.c
@@ -0,0 +1,2 @@
+#define INJSTR " (INJECTED)"
+#include "ip_local_port_range.c"
diff --git a/tests/ip_local_port_range.c b/tests/ip_local_port_range.c
new file mode 100644
index 000000000..e4449d455
--- /dev/null
+++ b/tests/ip_local_port_range.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2023 Eugene Syromyatnikov <evgsyr@gmail.com>
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "tests.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+
+#ifndef IP_LOCAL_PORT_RANGE
+# define IP_LOCAL_PORT_RANGE 51
+#endif
+
+#ifndef INJSTR
+# define INJSTR ""
+#endif
+
+int
+main(void)
+{
+	static const struct strval32 opts[] = {
+		{ 0,           NULL },
+		{ 1,           "1.." },
+		{ 12345,       "12345.." },
+		{ 0xbeef,      "48879.." },
+		{ 0x10000,     "..1" },
+		{ 12345 << 16, "..12345" },
+		{ 0x12341234U, "4660..4660" },
+		{ 0x87654321U, "17185..34661" },
+		{ 0xbadc0dedU, "3565..47836" },
+		{ 0xbeef0000U, "..48879" },
+		{ 0xbeef0001U, "1..48879" },
+		{ 0xbeefbeefU, "48879..48879" },
+		{ 0xbeeffaceU, NULL },
+	};
+
+	TAIL_ALLOC_OBJECT_CONST_PTR(unsigned int, ports);
+	TAIL_ALLOC_OBJECT_CONST_ARR(unsigned int, big_ports, 2);
+	const char *errstr;
+	socklen_t len;
+	int rc;
+
+	for (unsigned int i = 0; i < ARRAY_SIZE(opts); ++i) {
+		*ports = opts[i].val;
+
+		/* optlen < 0, EINVAL */
+		len = -1;
+		rc = setsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, len);
+		printf("setsockopt(0, " XLAT_FMT ", " XLAT_FMT ", %p, -1) = %s"
+		       INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       ports, sprintrc(rc));
+
+		rc = getsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, &len);
+		printf("getsockopt(0, " XLAT_FMT ", " XLAT_FMT ", %p, [-1]) = %s"
+		       INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       ports, sprintrc(rc));
+
+
+		/* optlen = 0, EINVAL */
+		len = 0;
+		rc = setsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, len);
+		printf("setsockopt(0, " XLAT_FMT ", " XLAT_FMT ", \"\", 0) = %s"
+		       INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       sprintrc(rc));
+
+		rc = getsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, &len);
+		printf("getsockopt(0, " XLAT_FMT ", " XLAT_FMT ", %p, [0]) = %s"
+		       INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       ports, sprintrc(rc));
+
+
+		/* optlen < sizeof(int), EINVAL */
+		len = sizeof(*ports) - 1;
+		rc = setsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, len);
+		errstr = sprintrc(rc);
+		printf("setsockopt(0, " XLAT_FMT ", " XLAT_FMT ", ",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE));
+		print_quoted_hex(ports, len);
+		printf(", 3) = %s" INJSTR "\n", errstr);
+
+		rc = getsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, &len);
+		errstr = sprintrc(rc);
+		printf("getsockopt(0, " XLAT_FMT ", " XLAT_FMT ", ",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE));
+		if (INJSTR[0])
+			print_quoted_hex(ports, len);
+		else
+			printf("%p",  ports);
+		printf(", [3]) = %s" INJSTR "\n", errstr);
+
+
+		/* optval EFAULT */
+		len = sizeof(*ports);
+		rc = setsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports + 1, len);
+		printf("setsockopt(0, " XLAT_FMT ", " XLAT_FMT ", %p, 4) = %s"
+		       INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       ports + 1, sprintrc(rc));
+
+		rc = getsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports + 1, &len);
+		printf("getsockopt(0, " XLAT_FMT ", " XLAT_FMT ", %p, [4]) = %s"
+		       INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       ports + 1, sprintrc(rc));
+
+
+		/* classic */
+		len = sizeof(*ports);
+		rc = setsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, len);
+		printf("setsockopt(0, " XLAT_FMT ", " XLAT_FMT ", [%#x%s%s%s]"
+		       ", 4) = %s" INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       *ports,
+		       !XLAT_RAW && opts[i].str ? " /* " : "",
+		       !XLAT_RAW && opts[i].str ? opts[i].str : "",
+		       !XLAT_RAW && opts[i].str ? " */" : "",
+		       sprintrc(rc));
+
+		rc = getsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, &len);
+		errstr = sprintrc(rc);
+		printf("getsockopt(0, " XLAT_FMT ", " XLAT_FMT ", ",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE));
+		if (INJSTR[0]) {
+			printf("[%#x%s%s%s]",
+			       *ports,
+			       !XLAT_RAW && opts[i].str ? " /* " : "",
+			       !XLAT_RAW && opts[i].str ? opts[i].str : "",
+			       !XLAT_RAW && opts[i].str ? " */" : "");
+		} else {
+			printf("%p",  ports);
+		}
+		printf(", [4]) = %s" INJSTR "\n", errstr);
+
+
+		/* optval > sizeof(int), EFAULT */
+		len = sizeof(*ports) + 1;
+		rc = setsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, len);
+		printf("setsockopt(0, " XLAT_FMT ", " XLAT_FMT ", %p, 5) = %s"
+		       INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       ports, sprintrc(rc));
+
+		rc = getsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, ports, &len);
+		printf("getsockopt(0, " XLAT_FMT ", " XLAT_FMT ", %p, [5]) = %s"
+		       INJSTR "\n",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE),
+		       ports, sprintrc(rc));
+
+
+		/* optlen > sizeof(int), EINVAL */
+		len = sizeof(*ports) * 2;
+		big_ports[0] = opts[i].val;
+		big_ports[1] = opts[i].val;
+		rc = setsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, big_ports, len);
+		errstr = sprintrc(rc);
+		printf("setsockopt(0, " XLAT_FMT ", " XLAT_FMT ", ",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE));
+		print_quoted_hex(big_ports, len);
+		printf(", 8) = %s" INJSTR "\n", errstr);
+
+		rc = getsockopt(0, SOL_IP, IP_LOCAL_PORT_RANGE, big_ports, &len);
+		errstr = sprintrc(rc);
+		printf("getsockopt(0, " XLAT_FMT ", " XLAT_FMT ", ",
+		       XLAT_ARGS(SOL_IP), XLAT_ARGS(IP_LOCAL_PORT_RANGE));
+		if (INJSTR[0])
+			print_quoted_hex(big_ports, len);
+		else
+			printf("%p",  big_ports);
+		printf(", [8]) = %s" INJSTR "\n", errstr);
+	}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
diff --git a/tests/pure_executables.list b/tests/pure_executables.list
index 331c4e1c7..a1315f64e 100755
--- a/tests/pure_executables.list
+++ b/tests/pure_executables.list
@@ -270,6 +270,10 @@ ioprio
 ioprio-Xabbrev
 ioprio-Xraw
 ioprio-Xverbose
+ip_local_port_range
+ip_local_port_range-Xabbrev
+ip_local_port_range-Xraw
+ip_local_port_range-Xverbose
 ip_mreq
 ipc
 ipc_msg