70 lines
1.5 KiB
C
Executable File
70 lines
1.5 KiB
C
Executable File
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <ctype.h>
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char *str_trim(char *s) {
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char *start, *last, *bk;
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int len;
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start = s;
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while (isspace(*start))
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start++;
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bk = last = s + strlen(s) - 1;
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while (last > start && isspace(*last))
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last--;
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if ((s != start) || (bk != last)) {
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len = last - start + 1;
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strncpy(s, start, len);
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s[len] = '\0';
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}
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return s;
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}
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int exec_with_result_line(char *cmd, char *result, int len)
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{
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FILE *fp = NULL;
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if (!cmd || !result || !len)
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return -1;
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fp = popen(cmd, "r");
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if (!fp)
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return -1;
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fgets(result, len, fp);
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str_trim(result);
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pclose(fp);
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return 0;
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}
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <arpa/inet.h>
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int check_same_network(char *ip1, char *netmask, char *ip2) {
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struct in_addr addr1, addr2, mask;
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if (inet_pton(AF_INET, ip1, &addr1) != 1) {
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printf("Invalid IP address: %s\n", ip1);
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return -1;
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}
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if (inet_pton(AF_INET, netmask, &mask) != 1) {
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printf("Invalid netmask: %s\n", netmask);
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return -1;
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}
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if (inet_pton(AF_INET, ip2, &addr2) != 1) {
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printf("Invalid IP address: %s\n", ip2);
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return -1;
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}
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if ((addr1.s_addr & mask.s_addr) == (addr2.s_addr & mask.s_addr)) {
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return 1;
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} else {
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return 0;
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}
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}
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