1 /*-
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
34 #include "netdissect-stdinc.h"
44 	size_t misalignment = (size_t)(p - buf) % alignment;  in nd_cpack_next_boundary()
49 	return p + (alignment - misalignment);  in nd_cpack_next_boundary()
57 nd_cpack_align_and_reserve(struct cpack_state *cs, size_t wordsize)  in nd_cpack_align_and_reserve()  argument
62 	next = nd_cpack_next_boundary(cs->c_buf, cs->c_next, wordsize);  in nd_cpack_align_and_reserve()
65 	if (next - cs->c_buf + wordsize > cs->c_len)  in nd_cpack_align_and_reserve()
73 nd_cpack_advance(struct cpack_state *cs, const size_t toskip)  in nd_cpack_advance()  argument
76 	if (cs->c_next - cs->c_buf + toskip > cs->c_len)  in nd_cpack_advance()
77 		return -1;  in nd_cpack_advance()
78 	cs->c_next += toskip;  in nd_cpack_advance()
83 nd_cpack_init(struct cpack_state *cs, const uint8_t *buf, size_t buflen)  in nd_cpack_init()  argument
85 	memset(cs, 0, sizeof(*cs));  in nd_cpack_init()
87 	cs->c_buf = buf;  in nd_cpack_init()
88 	cs->c_len = buflen;  in nd_cpack_init()
89 	cs->c_next = cs->c_buf;  in nd_cpack_init()
94 /* Unpack a 64-bit unsigned integer. */
96 nd_cpack_uint64(netdissect_options *ndo, struct cpack_state *cs, uint64_t *u)  in nd_cpack_uint64()  argument
100 	if ((next = nd_cpack_align_and_reserve(cs, sizeof(*u))) == NULL)  in nd_cpack_uint64()
101 		return -1;  in nd_cpack_uint64()
106 	cs->c_next = next + sizeof(*u);  in nd_cpack_uint64()
110 /* Unpack a 64-bit signed integer. */
112 nd_cpack_int64(netdissect_options *ndo, struct cpack_state *cs, int64_t *u)  in nd_cpack_int64()  argument
116 	if ((next = nd_cpack_align_and_reserve(cs, sizeof(*u))) == NULL)  in nd_cpack_int64()
117 		return -1;  in nd_cpack_int64()
122 	cs->c_next = next + sizeof(*u);  in nd_cpack_int64()
126 /* Unpack a 32-bit unsigned integer. */
128 nd_cpack_uint32(netdissect_options *ndo, struct cpack_state *cs, uint32_t *u)  in nd_cpack_uint32()  argument
132 	if ((next = nd_cpack_align_and_reserve(cs, sizeof(*u))) == NULL)  in nd_cpack_uint32()
133 		return -1;  in nd_cpack_uint32()
138 	cs->c_next = next + sizeof(*u);  in nd_cpack_uint32()
142 /* Unpack a 32-bit signed integer. */
144 nd_cpack_int32(netdissect_options *ndo, struct cpack_state *cs, int32_t *u)  in nd_cpack_int32()  argument
148 	if ((next = nd_cpack_align_and_reserve(cs, sizeof(*u))) == NULL)  in nd_cpack_int32()
149 		return -1;  in nd_cpack_int32()
154 	cs->c_next = next + sizeof(*u);  in nd_cpack_int32()
158 /* Unpack a 16-bit unsigned integer. */
160 nd_cpack_uint16(netdissect_options *ndo, struct cpack_state *cs, uint16_t *u)  in nd_cpack_uint16()  argument
164 	if ((next = nd_cpack_align_and_reserve(cs, sizeof(*u))) == NULL)  in nd_cpack_uint16()
165 		return -1;  in nd_cpack_uint16()
170 	cs->c_next = next + sizeof(*u);  in nd_cpack_uint16()
174 /* Unpack a 16-bit signed integer. */
176 nd_cpack_int16(netdissect_options *ndo, struct cpack_state *cs, int16_t *u)  in nd_cpack_int16()  argument
180 	if ((next = nd_cpack_align_and_reserve(cs, sizeof(*u))) == NULL)  in nd_cpack_int16()
181 		return -1;  in nd_cpack_int16()
186 	cs->c_next = next + sizeof(*u);  in nd_cpack_int16()
190 /* Unpack an 8-bit unsigned integer. */
192 nd_cpack_uint8(netdissect_options *ndo, struct cpack_state *cs, uint8_t *u)  in nd_cpack_uint8()  argument
195 	if ((size_t)(cs->c_next - cs->c_buf) >= cs->c_len)  in nd_cpack_uint8()
196 		return -1;  in nd_cpack_uint8()
198 	*u = GET_U_1(cs->c_next);  in nd_cpack_uint8()
201 	cs->c_next++;  in nd_cpack_uint8()
205 /* Unpack an 8-bit signed integer. */
207 nd_cpack_int8(netdissect_options *ndo, struct cpack_state *cs, int8_t *u)  in nd_cpack_int8()  argument
210 	if ((size_t)(cs->c_next - cs->c_buf) >= cs->c_len)  in nd_cpack_int8()
211 		return -1;  in nd_cpack_int8()
213 	*u = GET_S_1(cs->c_next);  in nd_cpack_int8()
216 	cs->c_next++;  in nd_cpack_int8()