/src/systemd/src/network/netdev/geneve.c

Source (jump to first uncovered line)
/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <linux/if_arp.h>

#include "sd-netlink.h"

#include "conf-parser.h"
#include "geneve.h"
#include "parse-util.h"
#include "string-table.h"
#include "string-util.h"

#define GENEVE_FLOW_LABEL_MAX_MASK 0xFFFFFU
#define DEFAULT_GENEVE_DESTINATION_PORT 6081

static const char* const geneve_df_table[_NETDEV_GENEVE_DF_MAX] = {
        [NETDEV_GENEVE_DF_NO]      = "no",
        [NETDEV_GENEVE_DF_YES]     = "yes",
        [NETDEV_GENEVE_DF_INHERIT] = "inherit",
};

DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(geneve_df, GeneveDF, NETDEV_GENEVE_DF_YES);
DEFINE_CONFIG_PARSE_ENUM(config_parse_geneve_df, geneve_df, GeneveDF);

static int netdev_geneve_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
        assert(m);

        Geneve *v = GENEVE(netdev);
        int r;

        if (v->id <= GENEVE_VID_MAX) {
                r = sd_netlink_message_append_u32(m, IFLA_GENEVE_ID, v->id);
                if (r < 0)
                        return r;
        }

        if (in_addr_is_set(v->remote_family, &v->remote)) {
                if (v->remote_family == AF_INET)
                        r = sd_netlink_message_append_in_addr(m, IFLA_GENEVE_REMOTE, &v->remote.in);
                else
                        r = sd_netlink_message_append_in6_addr(m, IFLA_GENEVE_REMOTE6, &v->remote.in6);
                if (r < 0)
                        return r;
        }

        if (v->inherit) {
                r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL_INHERIT, 1);
                if (r < 0)
                        return r;
        } else {
                r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL, v->ttl);
                if (r < 0)
                        return r;
        }

        r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TOS, v->tos);
        if (r < 0)
                return r;

        r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_CSUM, v->udpcsum);
        if (r < 0)
                return r;

        r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
        if (r < 0)
                return r;

        r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
        if (r < 0)
                return r;

        if (v->dest_port != DEFAULT_GENEVE_DESTINATION_PORT) {
                r = sd_netlink_message_append_u16(m, IFLA_GENEVE_PORT, htobe16(v->dest_port));
                if (r < 0)
                        return r;
        }

        if (v->flow_label > 0) {
                r = sd_netlink_message_append_u32(m, IFLA_GENEVE_LABEL, htobe32(v->flow_label));
                if (r < 0)
                        return r;
        }

        if (v->inherit_inner_protocol) {
                r = sd_netlink_message_append_flag(m, IFLA_GENEVE_INNER_PROTO_INHERIT);
                if (r < 0)
                        return r;
        }

        if (v->geneve_df != _NETDEV_GENEVE_DF_INVALID) {
                r = sd_netlink_message_append_u8(m, IFLA_GENEVE_DF, v->geneve_df);
                if (r < 0)
                        return r;
        }

        return 0;
}

int config_parse_geneve_vni(
                const char *unit,
                const char *filename,
                unsigned line,
                const char *section,
                unsigned section_line,
                const char *lvalue,
                int ltype,
                const char *rvalue,
                void *data,
                void *userdata) {

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        Geneve *v = ASSERT_PTR(userdata);

        return config_parse_uint32_bounded(
                        unit, filename, line, section, section_line, lvalue, rvalue,
                        0, GENEVE_VID_MAX, true,
                        &v->id);
}

int config_parse_geneve_address(
                const char *unit,
                const char *filename,
                unsigned line,
                const char *section,
                unsigned section_line,
                const char *lvalue,
                int ltype,
                const char *rvalue,
                void *data,
                void *userdata) {

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        Geneve *v = ASSERT_PTR(userdata);
        union in_addr_union *addr = data, buffer;
        int r, f;

        r = in_addr_from_string_auto(rvalue, &f, &buffer);
        if (r < 0) {
                log_syntax(unit, LOG_WARNING, filename, line, r,
                           "geneve '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue);
                return 0;
        }

        r = in_addr_is_multicast(f, &buffer);
        if (r > 0) {
                log_syntax(unit, LOG_WARNING, filename, line, 0,
                           "geneve invalid multicast '%s' address, ignoring assignment: %s", lvalue, rvalue);
                return 0;
        }

        v->remote_family = f;
        *addr = buffer;

        return 0;
}

int config_parse_geneve_flow_label(
                const char *unit,
                const char *filename,
                unsigned line,
                const char *section,
                unsigned section_line,
                const char *lvalue,
                int ltype,
                const char *rvalue,
                void *data,
                void *userdata) {

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        Geneve *v = ASSERT_PTR(userdata);
        uint32_t f;
        int r;

        r = safe_atou32(rvalue, &f);
        if (r < 0) {
                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve flow label '%s'.", rvalue);
                return 0;
        }

        if (f & ~GENEVE_FLOW_LABEL_MAX_MASK) {
                log_syntax(unit, LOG_WARNING, filename, line, 0,
                           "Geneve flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
                return 0;
        }

        v->flow_label = f;

        return 0;
}

int config_parse_geneve_ttl(
                const char *unit,
                const char *filename,
                unsigned line,
                const char *section,
                unsigned section_line,
                const char *lvalue,
                int ltype,
                const char *rvalue,
                void *data,
                void *userdata) {

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        Geneve *v = ASSERT_PTR(userdata);
        int r;

        if (streq(rvalue, "inherit")) {
                v->inherit = true;
                v->ttl = 0;  /* unset the unused ttl field for clarity */
                return 0;
        }

        r = config_parse_uint8_bounded(
                        unit, filename, line, section, section_line, lvalue, rvalue,
                        0, UINT8_MAX, true,
                        &v->ttl);
        if (r <= 0)
                return r;
        v->inherit = false;
        return 0;
}

static int netdev_geneve_verify(NetDev *netdev, const char *filename) {
        assert(filename);

        Geneve *v = GENEVE(netdev);

        if (v->id > GENEVE_VID_MAX)
                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
                                                "%s: Geneve without valid VNI (or Virtual Network Identifier) configured. Ignoring.",
                                                filename);
        return 0;
}

static bool geneve_can_set_mac(NetDev *netdev, const struct hw_addr_data *hw_addr) {
        return true;
}

static void geneve_init(NetDev *netdev) {
        Geneve *v = GENEVE(netdev);

        v->id = GENEVE_VID_MAX + 1;
        v->geneve_df = _NETDEV_GENEVE_DF_INVALID;
        v->dest_port = DEFAULT_GENEVE_DESTINATION_PORT;
        v->udpcsum = false;
        v->udp6zerocsumtx = false;
        v->udp6zerocsumrx = false;
}

const NetDevVTable geneve_vtable = {
        .object_size = sizeof(Geneve),
        .init = geneve_init,
        .sections = NETDEV_COMMON_SECTIONS "GENEVE\0",
        .fill_message_create = netdev_geneve_fill_message_create,
        .create_type = NETDEV_CREATE_INDEPENDENT,
        .config_verify = netdev_geneve_verify,
        .can_set_mac = geneve_can_set_mac,
        .iftype = ARPHRD_ETHER,
        .generate_mac = true,
};

Coverage Report

Created: 2025-08-28 06:46

Line	Count	Source (jump to first uncovered line)
1		/* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3		#include <linux/if_arp.h>
4
5		#include "sd-netlink.h"
6
7		#include "conf-parser.h"
8		#include "geneve.h"
9		#include "parse-util.h"
10		#include "string-table.h"
11		#include "string-util.h"
12
13	430	#define GENEVE_FLOW_LABEL_MAX_MASK 0xFFFFFU
14	333	#define DEFAULT_GENEVE_DESTINATION_PORT 6081
15
16		static const char* const geneve_df_table[_NETDEV_GENEVE_DF_MAX] = {
17		[NETDEV_GENEVE_DF_NO] = "no",
18		[NETDEV_GENEVE_DF_YES] = "yes",
19		[NETDEV_GENEVE_DF_INHERIT] = "inherit",
20		};
21
22		DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(geneve_df, GeneveDF, NETDEV_GENEVE_DF_YES);
23		DEFINE_CONFIG_PARSE_ENUM(config_parse_geneve_df, geneve_df, GeneveDF);
24
25	0	static int netdev_geneve_fill_message_create(NetDev netdev, Link link, sd_netlink_message *m) {
26	0	assert(m);
27
28	0	Geneve *v = GENEVE(netdev);
29	0	int r;
30
31	0	if (v->id <= GENEVE_VID_MAX) {
32	0	r = sd_netlink_message_append_u32(m, IFLA_GENEVE_ID, v->id);
33	0	if (r < 0)
34	0	return r;
35	0	}
36
37	0	if (in_addr_is_set(v->remote_family, &v->remote)) {
38	0	if (v->remote_family == AF_INET)
39	0	r = sd_netlink_message_append_in_addr(m, IFLA_GENEVE_REMOTE, &v->remote.in);
40	0	else
41	0	r = sd_netlink_message_append_in6_addr(m, IFLA_GENEVE_REMOTE6, &v->remote.in6);
42	0	if (r < 0)
43	0	return r;
44	0	}
45
46	0	if (v->inherit) {
47	0	r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL_INHERIT, 1);
48	0	if (r < 0)
49	0	return r;
50	0	} else {
51	0	r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL, v->ttl);
52	0	if (r < 0)
53	0	return r;
54	0	}
55
56	0	r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TOS, v->tos);
57	0	if (r < 0)
58	0	return r;
59
60	0	r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_CSUM, v->udpcsum);
61	0	if (r < 0)
62	0	return r;
63
64	0	r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
65	0	if (r < 0)
66	0	return r;
67
68	0	r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
69	0	if (r < 0)
70	0	return r;
71
72	0	if (v->dest_port != DEFAULT_GENEVE_DESTINATION_PORT) {
73	0	r = sd_netlink_message_append_u16(m, IFLA_GENEVE_PORT, htobe16(v->dest_port));
74	0	if (r < 0)
75	0	return r;
76	0	}
77
78	0	if (v->flow_label > 0) {
79	0	r = sd_netlink_message_append_u32(m, IFLA_GENEVE_LABEL, htobe32(v->flow_label));
80	0	if (r < 0)
81	0	return r;
82	0	}
83
84	0	if (v->inherit_inner_protocol) {
85	0	r = sd_netlink_message_append_flag(m, IFLA_GENEVE_INNER_PROTO_INHERIT);
86	0	if (r < 0)
87	0	return r;
88	0	}
89
90	0	if (v->geneve_df != _NETDEV_GENEVE_DF_INVALID) {
91	0	r = sd_netlink_message_append_u8(m, IFLA_GENEVE_DF, v->geneve_df);
92	0	if (r < 0)
93	0	return r;
94	0	}
95
96	0	return 0;
97	0	}
98
99		int config_parse_geneve_vni(
100		const char *unit,
101		const char *filename,
102		unsigned line,
103		const char *section,
104		unsigned section_line,
105		const char *lvalue,
106		int ltype,
107		const char *rvalue,
108		void *data,
109	623	void *userdata) {
110
111	623	assert(filename);
112	623	assert(lvalue);
113	623	assert(rvalue);
114	623	assert(data);
115
116	623	Geneve *v = ASSERT_PTR(userdata);
117
118	623	return config_parse_uint32_bounded(
119	623	unit, filename, line, section, section_line, lvalue, rvalue,
120	623	0, GENEVE_VID_MAX, true,
121	623	&v->id);
122	623	}
123
124		int config_parse_geneve_address(
125		const char *unit,
126		const char *filename,
127		unsigned line,
128		const char *section,
129		unsigned section_line,
130		const char *lvalue,
131		int ltype,
132		const char *rvalue,
133		void *data,
134	608	void *userdata) {
135
136	608	assert(filename);
137	608	assert(lvalue);
138	608	assert(rvalue);
139	608	assert(data);
140
141	608	Geneve *v = ASSERT_PTR(userdata);
142	608	union in_addr_union *addr = data, buffer;
143	608	int r, f;
144
145	608	r = in_addr_from_string_auto(rvalue, &f, &buffer);
146	608	if (r < 0) {
147	215	log_syntax(unit, LOG_WARNING, filename, line, r,
148	215	"geneve '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue);
149	215	return 0;
150	215	}
151
152	393	r = in_addr_is_multicast(f, &buffer);
153	393	if (r > 0) {
154	195	log_syntax(unit, LOG_WARNING, filename, line, 0,
155	195	"geneve invalid multicast '%s' address, ignoring assignment: %s", lvalue, rvalue);
156	195	return 0;
157	195	}
158
159	198	v->remote_family = f;
160	198	*addr = buffer;
161
162	198	return 0;
163	393	}
164
165		int config_parse_geneve_flow_label(
166		const char *unit,
167		const char *filename,
168		unsigned line,
169		const char *section,
170		unsigned section_line,
171		const char *lvalue,
172		int ltype,
173		const char *rvalue,
174		void *data,
175	647	void *userdata) {
176
177	647	assert(filename);
178	647	assert(lvalue);
179	647	assert(rvalue);
180	647	assert(data);
181
182	647	Geneve *v = ASSERT_PTR(userdata);
183	647	uint32_t f;
184	647	int r;
185
186	647	r = safe_atou32(rvalue, &f);
187	647	if (r < 0) {
188	217	log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve flow label '%s'.", rvalue);
189	217	return 0;
190	217	}
191
192	430	if (f & ~GENEVE_FLOW_LABEL_MAX_MASK) {
193	216	log_syntax(unit, LOG_WARNING, filename, line, 0,
194	216	"Geneve flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
195	216	return 0;
196	216	}
197
198	214	v->flow_label = f;
199
200	214	return 0;
201	430	}
202
203		int config_parse_geneve_ttl(
204		const char *unit,
205		const char *filename,
206		unsigned line,
207		const char *section,
208		unsigned section_line,
209		const char *lvalue,
210		int ltype,
211		const char *rvalue,
212		void *data,
213	649	void *userdata) {
214
215	649	assert(filename);
216	649	assert(lvalue);
217	649	assert(rvalue);
218	649	assert(data);
219
220	649	Geneve *v = ASSERT_PTR(userdata);
221	649	int r;
222
223	649	if (streq(rvalue, "inherit")) {
224	194	v->inherit = true;
225	194	v->ttl = 0; /* unset the unused ttl field for clarity */
226	194	return 0;
227	194	}
228
229	455	r = config_parse_uint8_bounded(
230	455	unit, filename, line, section, section_line, lvalue, rvalue,
231	455	0, UINT8_MAX, true,
232	455	&v->ttl);
233	455	if (r <= 0)
234	255	return r;
235	200	v->inherit = false;
236	200	return 0;
237	455	}
238
239	333	static int netdev_geneve_verify(NetDev netdev, const char filename) {
240	333	assert(filename);
241
242	333	Geneve *v = GENEVE(netdev);
243
244	333	if (v->id > GENEVE_VID_MAX)
245	294	return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
246	39	"%s: Geneve without valid VNI (or Virtual Network Identifier) configured. Ignoring.",
247	39	filename);
248	39	return 0;
249	333	}
250
251	0	static bool geneve_can_set_mac(NetDev netdev, const struct hw_addr_data hw_addr) {
252	0	return true;
253	0	}
254
255	333	static void geneve_init(NetDev *netdev) {
256	333	Geneve *v = GENEVE(netdev);
257
258	333	v->id = GENEVE_VID_MAX + 1;
259	333	v->geneve_df = _NETDEV_GENEVE_DF_INVALID;
260	333	v->dest_port = DEFAULT_GENEVE_DESTINATION_PORT;
261	333	v->udpcsum = false;
262	333	v->udp6zerocsumtx = false;
263	333	v->udp6zerocsumrx = false;
264	333	}
265
266		const NetDevVTable geneve_vtable = {
267		.object_size = sizeof(Geneve),
268		.init = geneve_init,
269		.sections = NETDEV_COMMON_SECTIONS "GENEVE\0",
270		.fill_message_create = netdev_geneve_fill_message_create,
271		.create_type = NETDEV_CREATE_INDEPENDENT,
272		.config_verify = netdev_geneve_verify,
273		.can_set_mac = geneve_can_set_mac,
274		.iftype = ARPHRD_ETHER,
275		.generate_mac = true,
276		};