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Diffstat (limited to '')
| -rw-r--r-- | include/compat/getaddrinfo.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/include/compat/getaddrinfo.h b/include/compat/getaddrinfo.h new file mode 100644 index 0000000..c1f87ef --- /dev/null +++ b/include/compat/getaddrinfo.h @@ -0,0 +1,83 @@ +/* + * 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 system getaddrinfo implementation 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. */ +sudo_dso_public int sudo_getaddrinfo(const char *nodename, const char *servname, + const struct addrinfo *hints, struct addrinfo **res); +sudo_dso_public void sudo_freeaddrinfo(struct addrinfo *ai); +sudo_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 */ |