lib/librte_cmdline/cmdline_parse_ipaddr.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation.
   3  * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
   4  * All rights reserved.
   5  */
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <stdarg.h>
  10 #include <inttypes.h>
  11 #include <ctype.h>
  12 #include <string.h>
  13 #include <errno.h>
  14 #include <arpa/inet.h>
  15 #include <netinet/in.h>
  16 #include <sys/socket.h>
  17
  18 #include <rte_string_fns.h>
  19
  20 #include "cmdline_parse.h"
  21 #include "cmdline_parse_ipaddr.h"
  22
  23 struct cmdline_token_ops cmdline_token_ipaddr_ops = {
  24         .parse = cmdline_parse_ipaddr,
  25         .complete_get_nb = NULL,
  26         .complete_get_elt = NULL,
  27         .get_help = cmdline_get_help_ipaddr,
  28 };
  29
  30 #define PREFIXMAX 128
  31 #define V4PREFIXMAX 32
  32
  33 int
  34 cmdline_parse_ipaddr(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
  35         unsigned ressize)
  36 {
  37         struct cmdline_token_ipaddr *tk2;
  38         unsigned int token_len = 0;
  39         char ip_str[INET6_ADDRSTRLEN+4+1]; /* '+4' is for prefixlen (if any) */
  40         cmdline_ipaddr_t ipaddr;
  41         char *prefix, *prefix_end;
  42         long prefixlen = 0;
  43
  44         if (res && ressize < sizeof(cmdline_ipaddr_t))
  45                 return -1;
  46
  47         if (!buf || !tk || ! *buf)
  48                 return -1;
  49
  50         tk2 = (struct cmdline_token_ipaddr *)tk;
  51
  52         while (!cmdline_isendoftoken(buf[token_len]))
  53                 token_len++;
  54
  55         /* if token is too big... */
  56         if (token_len >= INET6_ADDRSTRLEN+4)
  57                 return -1;
  58
  59         strlcpy(ip_str, buf, token_len + 1);
  60
  61         /* convert the network prefix */
  62         if (tk2->ipaddr_data.flags & CMDLINE_IPADDR_NETWORK) {
  63                 prefix = strrchr(ip_str, '/');
  64                 if (prefix == NULL)
  65                         return -1;
  66                 *prefix = '\0';
  67                 prefix ++;
  68                 errno = 0;
  69                 prefixlen = strtol(prefix, &prefix_end, 10);
  70                 if (errno || (*prefix_end != '\0')
  71                         || prefixlen < 0 || prefixlen > PREFIXMAX)
  72                         return -1;
  73                 ipaddr.prefixlen = prefixlen;
  74         }
  75         else {
  76                 ipaddr.prefixlen = 0;
  77         }
  78
  79         /* convert the IP addr */
  80         if ((tk2->ipaddr_data.flags & CMDLINE_IPADDR_V4) &&
  81             inet_pton(AF_INET, ip_str, &ipaddr.addr.ipv4) == 1 &&
  82                 prefixlen <= V4PREFIXMAX) {
  83                 ipaddr.family = AF_INET;
  84                 if (res)
  85                         memcpy(res, &ipaddr, sizeof(ipaddr));
  86                 return token_len;
  87         }
  88         if ((tk2->ipaddr_data.flags & CMDLINE_IPADDR_V6) &&
  89             inet_pton(AF_INET6, ip_str, &ipaddr.addr.ipv6) == 1) {
  90                 ipaddr.family = AF_INET6;
  91                 if (res)
  92                         memcpy(res, &ipaddr, sizeof(ipaddr));
  93                 return token_len;
  94         }
  95         return -1;
  96
  97 }
  98
  99 int cmdline_get_help_ipaddr(cmdline_parse_token_hdr_t *tk, char *dstbuf,
 100                             unsigned int size)
 101 {
 102         struct cmdline_token_ipaddr *tk2;
 103
 104         if (!tk || !dstbuf)
 105                 return -1;
 106
 107         tk2 = (struct cmdline_token_ipaddr *)tk;
 108
 109         switch (tk2->ipaddr_data.flags) {
 110         case CMDLINE_IPADDR_V4:
 111                 snprintf(dstbuf, size, "IPv4");
 112                 break;
 113         case CMDLINE_IPADDR_V6:
 114                 snprintf(dstbuf, size, "IPv6");
 115                 break;
 116         case CMDLINE_IPADDR_V4|CMDLINE_IPADDR_V6:
 117                 snprintf(dstbuf, size, "IPv4/IPv6");
 118                 break;
 119         case CMDLINE_IPADDR_NETWORK|CMDLINE_IPADDR_V4:
 120                 snprintf(dstbuf, size, "IPv4 network");
 121                 break;
 122         case CMDLINE_IPADDR_NETWORK|CMDLINE_IPADDR_V6:
 123                 snprintf(dstbuf, size, "IPv6 network");
 124                 break;
 125         case CMDLINE_IPADDR_NETWORK|CMDLINE_IPADDR_V4|CMDLINE_IPADDR_V6:
 126                 snprintf(dstbuf, size, "IPv4/IPv6 network");
 127                 break;
 128         default:
 129                 snprintf(dstbuf, size, "IPaddr (bad flags)");
 130                 break;
 131         }
 132         return 0;
 133 }