在linux2.6内核中为什么找不到地址转换函数inet_pton的实现？在很多FreeBSD的内核中却能够找到？
在linux2.6内核中为什么找不到inet_pton的实现？在很多FreeBSD的内核中却能够找到？
真的很疑惑，不知道这个inet_pton到底是在linux2.6内核的什么地方呢？不可能找不到的呀？FreeBSD的很多内核里却能找到。实现如下：
#if defined(LIBC_SCCS) && !defined(lint) 19 static const char rcsid[] = "$Id: inet_pton.c,v 1.3.18.2 2005/07/28 07:38:07 marka Exp $"; 20 #endif /* LIBC_SCCS and not lint */ 21 #include <sys/cdefs.h> 22 __FBSDID("$FreeBSD: head/sys/libkern/inet_pton.c 213103 2010-09-24 15:01:45Z attilio $"); 23 24 #include <sys/param.h> 25 #include <sys/socket.h> 26 #include <sys/systm.h> 27 28 #include <netinet/in.h> 29 30 #if __FreeBSD_version < 700000 31 #define strchr index 32 #endif 33 34 /*% 35 * WARNING: Don't even consider trying to compile this on a system where 36 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX. 37 */ 38 39 static int inet_pton4(const char *src, u_char *dst); 40 static int inet_pton6(const char *src, u_char *dst); 41 42 /* int 43 * inet_pton(af, src, dst) 44 * convert from presentation format (which usually means ASCII printable) 45 * to network format (which is usually some kind of binary format). 46 * return: 47 * 1 if the address was valid for the specified address family 48 * 0 if the address wasn't valid (`dst' is untouched in this case) 49 * -1 if some other error occurred (`dst' is untouched in this case, too) 50 * author: 51 * Paul Vixie, 1996. 52 */ 53 int 54 inet_pton(int af, const char *src, void *dst) 55 { 56 switch (af) { 57 case AF_INET: 58 return (inet_pton4(src, dst)); 59 case AF_INET6: 60 return (inet_pton6(src, dst)); 61 default: 62 return (-1); 63 } 64 /* NOTREACHED */ 65 } 66 67 /* int 68 * inet_pton4(src, dst) 69 * like inet_aton() but without all the hexadecimal and shorthand. 70 * return: 71 * 1 if `src' is a valid dotted quad, else 0. 72 * notice: 73 * does not touch `dst' unless it's returning 1. 74 * author: 75 * Paul Vixie, 1996. 76 */ 77 static int 78 inet_pton4(const char *src, u_char *dst) 79 { 80 static const char digits[] = "0123456789"; 81 int saw_digit, octets, ch; 82 #define NS_INADDRSZ 4 83 u_char tmp[NS_INADDRSZ], *tp; 84 85 saw_digit = 0; 86 octets = 0; 87 *(tp = tmp) = 0; 88 while ((ch = *src++) != '\0') { 89 const char *pch; 90 91 if ((pch = strchr(digits, ch)) != NULL) { 92 u_int new = *tp * 10 + (pch - digits); 93 94 if (saw_digit && *tp == 0) 95 return (0); 96 if (new > 255) 97 return (0); 98 *tp = new; 99 if (!saw_digit) { 100 if (++octets > 4) 101 return (0); 102 saw_digit = 1; 103 } 104 } else if (ch == '.' && saw_digit) { 105 if (octets == 4) 106 return (0); 107 *++tp = 0; 108 saw_digit = 0; 109 } else 110 return (0); 111 } 112 if (octets < 4) 113 return (0); 114 memcpy(dst, tmp, NS_INADDRSZ); 115 return (1); 116 }
[解决办法]
http://lxr.linux.no/#linux+v3.3/net/core/utils.c#L114
搜了个 不知道是不是
[解决办法]
lz 的代码时libc中的代码
http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/libc/inet/inet_pton.c?rev=1.3.10.1.8.1;content-type=text%2Fplain