/* * Replacement implementation of getaddrinfo. * * This is an implementation of the getaddrinfo family of functions for * systems that lack it, so that code can use getaddrinfo always. It provides * IPv4 support only; for IPv6 support, a native getaddrinfo implemenation is * required. * * The canonical version of this file is maintained in the rra-c-util package, * which can be found at <http://www.eyrie.org/~eagle/software/rra-c-util/>. * * Written by Russ Allbery <rra@stanford.edu> * * The authors hereby relinquish any claim to any copyright that they may have * in this work, whether granted under contract or by operation of law or * international treaty, and hereby commit to the public, at large, that they * shall not, at any time in the future, seek to enforce any copyright in this * work against any person or entity, or prevent any person or entity from * copying, publishing, distributing or creating derivative works of this * work. */ #ifndef COMPAT_GETADDRINFO_H #define COMPAT_GETADDRINFO_H #include <config.h> /* Skip this entire file if a system getaddrinfo was detected. */ #ifndef HAVE_GETADDRINFO /* OpenBSD likes to have sys/types.h included before sys/socket.h. */ #include <sys/types.h> #include <sys/socket.h> /* The struct returned by getaddrinfo, from RFC 3493. */ struct addrinfo { int ai_flags; /* AI_PASSIVE, AI_CANONNAME, .. */ int ai_family; /* AF_xxx */ int ai_socktype; /* SOCK_xxx */ int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */ socklen_t ai_addrlen; /* Length of ai_addr */ char *ai_canonname; /* Canonical name for nodename */ struct sockaddr *ai_addr; /* Binary address */ struct addrinfo *ai_next; /* Next structure in linked list */ }; /* Constants for ai_flags from RFC 3493, combined with binary or. */ #define AI_PASSIVE 0x0001 #define AI_CANONNAME 0x0002 #define AI_NUMERICHOST 0x0004 #define AI_NUMERICSERV 0x0008 #define AI_V4MAPPED 0x0010 #define AI_ALL 0x0020 #define AI_ADDRCONFIG 0x0040 /* Error return codes from RFC 3493. */ #define EAI_AGAIN 1 /* Temporary name resolution failure */ #define EAI_BADFLAGS 2 /* Invalid value in ai_flags parameter */ #define EAI_FAIL 3 /* Permanent name resolution failure */ #define EAI_FAMILY 4 /* Address family not recognized */ #define EAI_MEMORY 5 /* Memory allocation failure */ #define EAI_NONAME 6 /* nodename or servname unknown */ #define EAI_SERVICE 7 /* Service not recognized for socket type */ #define EAI_SOCKTYPE 8 /* Socket type not recognized */ #define EAI_SYSTEM 9 /* System error occurred, see errno */ #define EAI_OVERFLOW 10 /* An argument buffer overflowed */ /* Function prototypes. */ __dso_public int sudo_getaddrinfo(const char *nodename, const char *servname, const struct addrinfo *hints, struct addrinfo **res); __dso_public void sudo_freeaddrinfo(struct addrinfo *ai); __dso_public const char *sudo_gai_strerror(int ecode); /* Map sudo_* to RFC 3493 names. */ #undef getaddrinfo #define getaddrinfo(_a, _b, _c, _d) sudo_getaddrinfo((_a), (_b), (_c), (_d)) #undef freeaddrinfo #define freeaddrinfo(_a) sudo_freeaddrinfo((_a)) #undef gai_strerror #define gai_strerror(_a) sudo_gai_strerror((_a)) #endif /* !HAVE_GETADDRINFO */ #endif /* COMPAT_GETADDRINFO_H */