inet_pton - convert IPv4 and IPv6 addresses from text to binary form
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| #include <arpa/inet.h>
int inet_pton(int af, const char *restrict src, void *restrict dst);
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参数
返回值
inet_pton() returns 1 on success (network address was successfully converted). 0 is returned if src does not contain a character string representing a valid network address in the specified address family. If af does not contain a valid address family, -1 is returned and errno is set to EAFNOSUPPORT.
示例
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| #include <stdio.h>
#include <arpa/inet.h>
#include <string.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define NS_INADDRSZ 4
static int my_inet_pton4(src, dst)
const char *src;
u_char *dst;
{
int saw_digit, octets, ch;
u_char tmp[NS_INADDRSZ], *tp;
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
while ((ch = *src++) != '\0') {
printf("ch:%c\n", ch);
if (ch >= '0' && ch <= '9') {
u_int new = *tp * 10 + (ch - '0');
#if 1
printf("saw_digit:%d *tp:%d \n", saw_digit, *tp);
if (saw_digit && *tp == 0) {
printf("saw_digit:%d *tp:%d \n", saw_digit, *tp);
return (0);
}
#endif
if (new > 255) {
return (0);
}
*tp = new;
if (! saw_digit) {
if (++octets > 4) {
return (0);
}
saw_digit = 1;
}
} else if (ch == '.' && saw_digit) {
if (octets == 4) {
return (0);
}
*++tp = 0;
saw_digit = 0;
} else {
return (0);
}
}
if (octets < 4) {
return (0);
}
memcpy(dst, tmp, NS_INADDRSZ);
return (1);
}
int main()
{
int gw_ip = 0;
struct in_addr addr;;
char temp_buf[512]={0};
int wan_mode = 0;
memset(&addr,0,sizeof(struct in_addr));
printf("%d\n", inet_pton(AF_INET, "192.168.44.1", &addr));
// printf("%d\n", my_inet_pton4("192.168.01.1", &addr));
printf("%x\n", addr.s_addr);
gw_ip = ntohl(addr.s_addr);
printf("%x\n", gw_ip);
return 0;
}
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问题：
glibc中不能处理192.168.044.1，uclib 中可以正常处理