38 lines
844 B
C
38 lines
844 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <string.h>
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#define LEN 16
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#define OPT_LEN(len) ((len - 8) >> 3)
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int main(int argc, char **argv) {
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char extbuf[LEN], cbuf[LEN];
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int extlen;
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uint8_t *len;
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memset(extbuf, 0, sizeof(extbuf));
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memset(cbuf, 0, sizeof(cbuf));
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len = (uint8_t *)(extbuf + 1);
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printf("== calculate the needed buffer size if extlen is: %d ==\n",LEN);
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extlen = inet6_opt_init(extbuf, LEN);
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if (extlen != 2) {
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printf("ERROR: return invalid length %d, expect:2 \n", extlen);
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printf("<=====NG=====>\n");
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exit(1);
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}
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if (*len != OPT_LEN(LEN)) {
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printf("ERROR: the length field of extension header is invalid, length %d, expect:%d \n",
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*len, OPT_LEN(LEN));
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printf("<=====NG=====>\n");
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exit(1);
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}
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printf("OK\n");
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return 0;
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}
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