From 851b6a097165af4d51c0db01b5e05256e5006896 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:00:48 +0200 Subject: Adding upstream version 2.6.1. Signed-off-by: Daniel Baumann --- methods/rfc2553emu.h | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 methods/rfc2553emu.h (limited to 'methods/rfc2553emu.h') diff --git a/methods/rfc2553emu.h b/methods/rfc2553emu.h new file mode 100644 index 0000000..65d744d --- /dev/null +++ b/methods/rfc2553emu.h @@ -0,0 +1,112 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + RFC 2553 Emulation - Provides emulation for RFC 2553 getaddrinfo, + freeaddrinfo and getnameinfo + + These functions are necessary to write portable protocol independent + networking. They transparently support IPv4, IPv6 and probably many + other protocols too. This implementation is needed when the host does + not support these standards. It implements a simple wrapper that + basically supports only IPv4. + + Perfect emulation is not provided, but it is passable.. + + Originally written by Jason Gunthorpe and placed into + the Public Domain, do with it what you will. + + ##################################################################### */ + /*}}}*/ +#ifndef RFC2553EMU_H +#define RFC2553EMU_H + +#include +#include +#include + +// Autosense getaddrinfo +#if defined(AI_PASSIVE) && defined(EAI_NONAME) +#define HAVE_GETADDRINFO +#endif + +// Autosense getnameinfo +#if defined(NI_NUMERICHOST) +#define HAVE_GETNAMEINFO +#endif + +// getaddrinfo support? +#ifndef HAVE_GETADDRINFO + // Renamed to advoid type clashing.. (for debugging) + struct addrinfo_emu + { + int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */ + int ai_family; /* PF_xxx */ + int ai_socktype; /* SOCK_xxx */ + int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */ + size_t ai_addrlen; /* length of ai_addr */ + char *ai_canonname; /* canonical name for nodename */ + struct sockaddr *ai_addr; /* binary address */ + struct addrinfo_emu *ai_next; /* next structure in linked list */ + }; + #define addrinfo addrinfo_emu + + int getaddrinfo(const char *nodename, const char *servname, + const struct addrinfo *hints, + struct addrinfo **res); + void freeaddrinfo(struct addrinfo *ai); + + #ifndef AI_PASSIVE + #define AI_PASSIVE (1<<1) + #endif + + #ifndef EAI_NONAME + #define EAI_NONAME -1 + #define EAI_AGAIN -2 + #define EAI_FAIL -3 + #define EAI_NODATA -4 + #define EAI_FAMILY -5 + #define EAI_SOCKTYPE -6 + #define EAI_SERVICE -7 + #define EAI_ADDRFAMILY -8 + #define EAI_SYSTEM -10 + #define EAI_MEMORY -11 + #endif + + /* If we don't have getaddrinfo then we probably don't have + sockaddr_storage either (same RFC) so we definitely will not be + doing any IPv6 stuff. Do not use the members of this structure to + retain portability, cast to a sockaddr. */ + #define sockaddr_storage sockaddr_in +#endif + +// getnameinfo support (glibc2.0 has getaddrinfo only) +#ifndef HAVE_GETNAMEINFO + + int getnameinfo(const struct sockaddr *sa, socklen_t salen, + char *host, size_t hostlen, + char *serv, size_t servlen, + int flags); + + #ifndef NI_MAXHOST + #define NI_MAXHOST 1025 + #define NI_MAXSERV 32 + #endif + + #ifndef NI_NUMERICHOST + #define NI_NUMERICHOST (1<<0) + #define NI_NUMERICSERV (1<<1) +// #define NI_NOFQDN (1<<2) + #define NI_NAMEREQD (1<<3) + #define NI_DATAGRAM (1<<4) + #endif + + #define sockaddr_storage sockaddr_in +#endif + +// Glibc 2.0.7 misses this one +#ifndef AI_NUMERICHOST +#define AI_NUMERICHOST 0 +#endif + +#endif -- cgit v1.2.3