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119 lines
3.4 KiB
119 lines
3.4 KiB
/* platform_compat.c - Platform compatibility layer implementation */ |
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#include "platform_compat.h" |
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#include <stddef.h> |
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#include <stdint.h> |
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#include <string.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#ifdef _WIN32 |
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#include <windows.h> |
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#include <bcrypt.h> |
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#include <iphlpapi.h> |
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#pragma comment(lib, "iphlpapi.lib") |
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#ifndef STATUS_SUCCESS |
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#define STATUS_SUCCESS ((NTSTATUS)0x00000000L) |
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#endif |
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#else |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <ifaddrs.h> |
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#include <net/if.h> |
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#ifndef IFA_F_TEMPORARY |
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#define IFA_F_TEMPORARY 0x01 |
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#endif |
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#endif |
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/* |
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* Generate cryptographically secure random bytes |
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* Returns 0 on success, -1 on error |
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*/ |
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int random_bytes(uint8_t *buffer, size_t len) { |
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if (!buffer || len == 0) return -1; |
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#ifdef _WIN32 |
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NTSTATUS status = BCryptGenRandom(NULL, buffer, (ULONG)len, BCRYPT_USE_SYSTEM_PREFERRED_RNG); |
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return (status == STATUS_SUCCESS) ? 0 : -1; |
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#else |
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int fd = open("/dev/urandom", O_RDONLY); |
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if (fd < 0) return -1; |
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ssize_t ret = read(fd, buffer, len); |
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close(fd); |
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return (ret == (ssize_t)len) ? 0 : -1; |
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#endif |
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} |
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#ifndef _WIN32 |
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uint32_t get_interface_ip_by_index(uint32_t netif_index) { |
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struct ifaddrs *ifaddr, *ifa; |
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if (getifaddrs(&ifaddr) == -1) return 0; |
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uint32_t result = 0; |
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for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { |
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if (ifa->ifa_addr == NULL) continue; |
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if (ifa->ifa_name == NULL) continue; |
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unsigned int idx = if_nametoindex(ifa->ifa_name); |
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if (idx != netif_index) continue; |
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if (ifa->ifa_addr->sa_family != AF_INET) continue; |
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struct sockaddr_in *addr = (struct sockaddr_in *)ifa->ifa_addr; |
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result = addr->sin_addr.s_addr; |
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break; |
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} |
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freeifaddrs(ifaddr); |
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return result; |
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} |
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int get_interface_ipv6_by_index(uint32_t netif_index, int temporary, uint8_t* addr_out) { |
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if (!addr_out) return -1; |
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memset(addr_out, 0, 16); |
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struct ifaddrs *ifaddr, *ifa; |
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if (getifaddrs(&ifaddr) == -1) return -1; |
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int found = 0; |
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for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { |
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if (ifa->ifa_addr == NULL) continue; |
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if (ifa->ifa_name == NULL) continue; |
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unsigned int idx = if_nametoindex(ifa->ifa_name); |
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if (idx != netif_index) continue; |
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if (ifa->ifa_addr->sa_family != AF_INET6) continue; |
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// Skip link-local addresses (fe80::/10) |
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struct sockaddr_in6* sin6 = (struct sockaddr_in6*)ifa->ifa_addr; |
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if ((sin6->sin6_addr.s6_addr[0] & 0xfe) == 0xfe && sin6->sin6_addr.s6_addr[1] == 0x80) continue; |
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int is_temporary = (ifa->ifa_flags & IFA_F_TEMPORARY) ? 1 : 0; |
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if (temporary && is_temporary) { |
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memcpy(addr_out, &sin6->sin6_addr, 16); |
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found = 1; |
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break; |
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} |
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if (!temporary && !is_temporary) { |
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memcpy(addr_out, &sin6->sin6_addr, 16); |
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found = 1; |
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break; |
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} |
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} |
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freeifaddrs(ifaddr); |
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return found ? 0 : -1; |
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} |
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#else |
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uint32_t get_interface_ip_by_index(uint32_t netif_index) { |
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(void)netif_index; |
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return 0; |
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} |
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int get_interface_ipv6_by_index(uint32_t netif_index, int temporary, uint8_t* addr_out) { |
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(void)netif_index; (void)temporary; |
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if (addr_out) memset(addr_out, 0, 16); |
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return -1; |
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} |
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#endif
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