diff options
Diffstat (limited to 'stacks/lwip_stack/lwip_src/common/stackx_ip_addr.c')
| -rw-r--r-- | stacks/lwip_stack/lwip_src/common/stackx_ip_addr.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/stacks/lwip_stack/lwip_src/common/stackx_ip_addr.c b/stacks/lwip_stack/lwip_src/common/stackx_ip_addr.c new file mode 100644 index 0000000..86f0b39 --- /dev/null +++ b/stacks/lwip_stack/lwip_src/common/stackx_ip_addr.c @@ -0,0 +1,276 @@ +/* +* +* Copyright (c) 2018 Huawei Technologies Co.,Ltd. +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at: +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ + +#include <stdint.h> +#include <stddef.h> +#include "stackx_ip_addr.h" +#include "nstack_log.h" +#include "spl_def.h" + +/* Here for now until needed in other places in stackx*/ +#ifndef isprint +#define in_range(c, lo, up) ((u8)c >= lo && (u8)c <= up) +#define isprint(c) in_range(c, 0x20, 0x7f) +#define isdigit(c) in_range(c, '0', '9') +#define isxdigit(c) (isdigit(c) || in_range(c, 'a', 'f') || in_range(c, 'A', 'F')) +#define islower(c) in_range(c, 'a', 'z') +#define isspace(c) (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v') +#endif + +/** + * Ascii internet address interpretation routine. + * The value returned is in network order. + * + * @param cp IPaddress in ascii represenation (e.g. "127.0.0.1") + * @return ipaddress in network order + */ +u32 spl_ipaddr_addr(const char *cp) +{ + spl_ip_addr_t val; + + if (spl_ipaddr_aton(cp, &val)) + { + return ip4_addr_get_u32(&val); + } + + return (SPL_IPADDR_NONE); +} + +/** + * Check whether "cp" is a valid ascii representation + * of an Internet address and convert to a binary address. + * Returns 1 if the address is valid, 0 if not. + * This replaces inet_addr, the return value from which + * cannot distinguish between failure and a local broad cast address. + * + * @param cp IPaddress in ascii represenation (e.g. "127.0.0.1") + * @param addr pointer to which to save the ipaddress in network order + * @return 1 if cp could be converted to addr, 0 on failure + */ +int spl_ipaddr_aton(const char *cp, spl_ip_addr_t * addr) +{ + u32 val; + u8 base; + char c; + u32 parts[4]; + u32 *pp = parts; + + if (cp == NULL) + { + return 0; + } + + c = *cp; + for (;;) + { + /* + * Get number up to ``.''. + * Values are specified as for C: + * 0x=hex, 0=octal, 1-9=decimal. + */ + if (!isdigit(c)) + { + return (0); + } + + val = 0; + base = 10; + if (c == '0') + { + c = *++cp; + if ((c == 'x') || (c == 'X')) + { + base = 16; + c = *++cp; + } + else + { + base = 8; + } + } + + for (;;) + { + if (isdigit(c)) + { + val = (val * base) + (int) (c - '0'); + c = *++cp; + } + else if ((base == 16) && isxdigit(c)) + { + val = (val << 4) | (int) (c + 10 - (islower(c) ? 'a' : 'A')); + c = *++cp; + } + else + { + break; + } + } + + if (c == '.') + { + /* + * Internet format: + * a.b.c.d + * a.b.c (with c treated as 16 bits) + * a.b (with b treated as 24 bits) + */ + if (pp >= parts + 3) + { + return (0); + } + + *pp++ = val; + c = *++cp; + } + else + { + break; + } + } + + /* + * Check for trailing characters. + */ + if ((c != '\0') && !isspace(c)) + { + return (0); + } + + /* + * Concoct the address according to + * the number of parts specified. + */ + switch (pp - parts + 1) + { + case 0: + return (0); /* initial nondigit */ + + case 1: /* a -- 32 bits */ + break; + + case 2: /* a.b -- 8.24 bits */ + if (val > 0xffffffUL) + { + return (0); + } + + val |= parts[0] << 24; + break; + + case 3: /* a.b.c -- 8.8.16 bits */ + if (val > 0xffff) + { + return (0); + } + + val |= (parts[0] << 24) | (parts[1] << 16); + break; + + case 4: /* a.b.c.d -- 8.8.8.8 bits */ + if (val > 0xff) + { + return (0); + } + + val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); + break; + default: + NSPOL_LOGERR("unhandled"); + + return (0); + } + + if (addr) + { + ip4_addr_set_u32(addr, spl_htonl(val)); + } + + return (1); +} + +/** + * Convert numeric IPaddress into decimal dotted ASCII representation. + * returns ptr to static buffer; not reentrant! + * + * @param addr ipaddress in network order to convert + * @return pointer to a global static (!) buffer that holds the ASCII + * represenation of addr + */ +char *spl_ipaddr_ntoa(const spl_ip_addr_t * addr) +{ + static char str[16]; + + return spl_ipaddr_ntoa_r(addr, str, 16); +} + +/** + * Same as spl_ipaddr_ntoa, but reentrant since a user-supplied buffer is used. + * + * @param addr ipaddress in network order to convert + * @param buf target buffer where the string is stored + * @param buflen length of buf + * @return either pointer to buf which now holds the ASCII + * representation of addr or NULL if buf was too small + */ +char *spl_ipaddr_ntoa_r(const spl_ip_addr_t * addr, char *buf, int buflen) +{ + u32 s_addr; + char inv[3]; + char *rp; + u8 *ap; + u8 rem; + u8 n; + u8 i; + int len = 0; + + s_addr = ip4_addr_get_u32(addr); + + rp = buf; + ap = (u8 *) & s_addr; + for (n = 0; n < 4; n++) + { + i = 0; + do + { + rem = *ap % (u8) 10; + *ap /= (u8) 10; + inv[i++] = '0' + rem; + } + while (*ap); + + while (i--) + { + if (len++ >= buflen) + { + return NULL; + } + + *rp++ = inv[i]; + } + + if (len++ >= buflen) + { + return NULL; + } + + *rp++ = '.'; + ap++; + } + + *--rp = 0; + return buf; +} |