|
| 1 | +/** |
| 2 | + * \file |
| 3 | + * Portable networking functions |
| 4 | + * |
| 5 | + * Author: |
| 6 | + * Rodrigo Kumpera ([email protected]) |
| 7 | + * |
| 8 | + * (C) 2015 Xamarin |
| 9 | + */ |
| 10 | + |
| 11 | +#include <mono/utils/mono-threads-coop.h> |
| 12 | +#include <glib.h> |
| 13 | + |
| 14 | +#ifdef HAVE_NETDB_H |
| 15 | +#include <netdb.h> |
| 16 | +#endif |
| 17 | +#ifdef HAVE_SYS_IOCTL_H |
| 18 | +#include <sys/ioctl.h> |
| 19 | +#endif |
| 20 | +#ifdef HAVE_SYS_SOCKET_H |
| 21 | +#include <sys/socket.h> |
| 22 | +#endif |
| 23 | +#ifdef HAVE_NET_IF_H |
| 24 | +#include <net/if.h> |
| 25 | +#endif |
| 26 | +#ifdef HAVE_UNISTD_H |
| 27 | +#include <unistd.h> |
| 28 | +#endif |
| 29 | + |
| 30 | +#include "debugger-networking.h" |
| 31 | + |
| 32 | + |
| 33 | +void |
| 34 | +mono_debugger_networking_init (void) |
| 35 | +{ |
| 36 | +#ifdef HOST_WIN32 |
| 37 | + WSADATA wsadata; |
| 38 | + int err; |
| 39 | + |
| 40 | + err = WSAStartup (2 /* 2.0 */, &wsadata); |
| 41 | + if(err) |
| 42 | + g_error ("%s: Couldn't initialise networking", __func__); |
| 43 | +#endif |
| 44 | +} |
| 45 | + |
| 46 | +void |
| 47 | +mono_debugger_networking_shutdown (void) |
| 48 | +{ |
| 49 | +#ifdef HOST_WIN32 |
| 50 | + WSACleanup (); |
| 51 | +#endif |
| 52 | +} |
| 53 | + |
| 54 | + |
| 55 | +/* port in host order, address in network order */ |
| 56 | +void |
| 57 | +mono_debugger_socket_address_init (MonoSocketAddress *sa, socklen_t *len, int family, const void *address, int port) |
| 58 | +{ |
| 59 | + memset (sa, 0, sizeof (MonoSocketAddress)); |
| 60 | + if (family == AF_INET) { |
| 61 | + *len = sizeof (struct sockaddr_in); |
| 62 | + |
| 63 | + sa->v4.sin_family = AF_INET; |
| 64 | + sa->v4.sin_addr = *(struct in_addr*)address; |
| 65 | + sa->v4.sin_port = htons (GINT_TO_UINT16 (port)); |
| 66 | +#if HAVE_SOCKADDR_IN_SIN_LEN |
| 67 | + sa->v4.sin_len = sizeof (*len); |
| 68 | +#endif |
| 69 | +#ifdef HAVE_STRUCT_SOCKADDR_IN6 |
| 70 | + } else if (family == AF_INET6) { |
| 71 | + *len = sizeof (struct sockaddr_in6); |
| 72 | + |
| 73 | + sa->v6.sin6_family = AF_INET6; |
| 74 | + sa->v6.sin6_addr = *(struct in6_addr*)address; |
| 75 | + sa->v6.sin6_port = htons (GINT_TO_UINT16 (port)); |
| 76 | +#if HAVE_SOCKADDR_IN6_SIN_LEN |
| 77 | + sa->v6.sin6_len = sizeof (*len); |
| 78 | +#endif |
| 79 | +#endif |
| 80 | + } else { |
| 81 | + g_error ("Cannot handle address family %d", family); |
| 82 | + } |
| 83 | +} |
| 84 | + |
| 85 | + |
| 86 | +void |
| 87 | +mono_debugger_free_address_info (MonoAddressInfo *ai) |
| 88 | +{ |
| 89 | + MonoAddressEntry *cur = ai->entries, *next; |
| 90 | + while (cur) { |
| 91 | + next = cur->next; |
| 92 | + g_free ((void*)cur->canonical_name); |
| 93 | + g_free (cur); |
| 94 | + cur = next; |
| 95 | + } |
| 96 | + g_strfreev (ai->aliases); |
| 97 | + g_free (ai); |
| 98 | +} |
| 99 | + |
| 100 | + |
| 101 | +#if !defined (HAVE_GETADDRINFO) && (defined (HAVE_GETHOSTBYNAME) || defined (HAVE_GETHOSTBYNAME2)) |
| 102 | +static void |
| 103 | +add_hostent (MonoAddressInfo *info, int flags, struct hostent *h) |
| 104 | +{ |
| 105 | + MonoAddressEntry *cur, *prev = info->entries; |
| 106 | + int idx = 0; |
| 107 | + |
| 108 | + if (!h) |
| 109 | + return; |
| 110 | + |
| 111 | + if (!info->aliases) |
| 112 | + info->aliases = g_strdupv (h->h_aliases); |
| 113 | + |
| 114 | + while (h->h_addr_list [idx]) { |
| 115 | + cur = g_new0 (MonoAddressEntry, 1); |
| 116 | + if (prev) |
| 117 | + prev->next = cur; |
| 118 | + else |
| 119 | + info->entries = cur; |
| 120 | + |
| 121 | + if (flags & MONO_HINT_CANONICAL_NAME && h->h_name) |
| 122 | + cur->canonical_name = g_strdup (h->h_name); |
| 123 | + |
| 124 | + cur->family = h->h_addrtype; |
| 125 | + cur->socktype = SOCK_STREAM; |
| 126 | + cur->protocol = 0; /* Zero means the default stream protocol */ |
| 127 | + cur->address_len = h->h_length; |
| 128 | + memcpy (&cur->address, h->h_addr_list [idx], h->h_length); |
| 129 | + |
| 130 | + prev = cur; |
| 131 | + ++idx; |
| 132 | + } |
| 133 | +} |
| 134 | +#endif /* !defined (HAVE_GETADDRINFO) && (defined (HAVE_GETHOSTBYNAME) || defined (HAVE_GETHOSTBYNAME2)) */ |
| 135 | + |
| 136 | + |
| 137 | +int |
| 138 | +mono_debugger_get_address_info (const char *hostname, int port, int flags, MonoAddressInfo **result) |
| 139 | +{ |
| 140 | +#if defined (HAVE_GETADDRINFO) /* modern posix networking code */ |
| 141 | + char service_name [16]; |
| 142 | + struct addrinfo hints, *res = NULL, *info; |
| 143 | + MonoAddressEntry *cur = NULL, *prev = NULL; |
| 144 | + MonoAddressInfo *addr_info; |
| 145 | + int ret; |
| 146 | + |
| 147 | + memset (&hints, 0, sizeof (struct addrinfo)); |
| 148 | + *result = NULL; |
| 149 | + |
| 150 | + hints.ai_family = PF_UNSPEC; |
| 151 | + if (flags & MONO_HINT_IPV4) |
| 152 | + hints.ai_family = PF_INET; |
| 153 | + else if (flags & MONO_HINT_IPV6) |
| 154 | + hints.ai_family = PF_INET6; |
| 155 | + |
| 156 | + hints.ai_socktype = SOCK_STREAM; |
| 157 | + |
| 158 | + if (flags & MONO_HINT_CANONICAL_NAME) |
| 159 | + hints.ai_flags = AI_CANONNAME; |
| 160 | + if (flags & MONO_HINT_NUMERIC_HOST) |
| 161 | + hints.ai_flags |= AI_NUMERICHOST; |
| 162 | + |
| 163 | +/* Some ancient libc don't define AI_ADDRCONFIG */ |
| 164 | +#ifdef AI_ADDRCONFIG |
| 165 | + if (flags & MONO_HINT_CONFIGURED_ONLY) |
| 166 | + hints.ai_flags |= AI_ADDRCONFIG; |
| 167 | +#endif |
| 168 | + sprintf (service_name, "%d", port); |
| 169 | + |
| 170 | + MONO_ENTER_GC_SAFE; |
| 171 | + ret = getaddrinfo (hostname, service_name, &hints, &info); |
| 172 | + MONO_EXIT_GC_SAFE; |
| 173 | + |
| 174 | + if (ret) |
| 175 | + return 1; /* FIXME propagate the error */ |
| 176 | + |
| 177 | + res = info; |
| 178 | + *result = addr_info = g_new0 (MonoAddressInfo, 1); |
| 179 | + |
| 180 | + while (res) { |
| 181 | + cur = g_new0 (MonoAddressEntry, 1); |
| 182 | + cur->family = res->ai_family; |
| 183 | + cur->socktype = res->ai_socktype; |
| 184 | + cur->protocol = res->ai_protocol; |
| 185 | + if (cur->family == PF_INET) { |
| 186 | + cur->address_len = sizeof (struct in_addr); |
| 187 | + cur->address.v4 = ((struct sockaddr_in*)res->ai_addr)->sin_addr; |
| 188 | +#ifdef HAVE_STRUCT_SOCKADDR_IN6 |
| 189 | + } else if (cur->family == PF_INET6) { |
| 190 | + cur->address_len = sizeof (struct in6_addr); |
| 191 | + cur->address.v6 = ((struct sockaddr_in6*)res->ai_addr)->sin6_addr; |
| 192 | +#endif |
| 193 | + } else { |
| 194 | + g_warning ("Cannot handle address family %d", cur->family); |
| 195 | + res = res->ai_next; |
| 196 | + g_free (cur); |
| 197 | + continue; |
| 198 | + } |
| 199 | + |
| 200 | + if (res->ai_canonname) |
| 201 | + cur->canonical_name = g_strdup (res->ai_canonname); |
| 202 | + |
| 203 | + if (prev) |
| 204 | + prev->next = cur; |
| 205 | + else |
| 206 | + addr_info->entries = cur; |
| 207 | + |
| 208 | + prev = cur; |
| 209 | + res = res->ai_next; |
| 210 | + } |
| 211 | + |
| 212 | + freeaddrinfo (info); |
| 213 | + return 0; |
| 214 | + |
| 215 | +#elif defined (HAVE_GETHOSTBYNAME) || defined (HAVE_GETHOSTBYNAME2) /* fallback networking code that relies on old BSD apis or whatever else is available */ |
| 216 | + MonoAddressInfo *addr_info; |
| 217 | + addr_info = g_new0 (MonoAddressInfo, 1); |
| 218 | + |
| 219 | +#ifdef HAVE_GETHOSTBYNAME2 |
| 220 | + if (flags & MONO_HINT_IPV6 || flags & MONO_HINT_UNSPECIFIED) |
| 221 | + add_hostent (addr_info, flags, gethostbyname2 (hostname, AF_INET6)); |
| 222 | + if (flags & MONO_HINT_IPV4 || flags & MONO_HINT_UNSPECIFIED) |
| 223 | + add_hostent (addr_info, flags, gethostbyname2 (hostname, AF_INET)); |
| 224 | +#else |
| 225 | + add_hostent (addr_info, flags, gethostbyname (hostname)) |
| 226 | +#endif |
| 227 | + |
| 228 | + if (!addr_info->entries) { |
| 229 | + *result = NULL; |
| 230 | + mono_debugger_free_address_info (addr_info); |
| 231 | + return 1; |
| 232 | + } |
| 233 | + |
| 234 | + *result = addr_info; |
| 235 | + return 0; |
| 236 | + |
| 237 | +#else |
| 238 | + g_error ("No networking implementation available"); |
| 239 | + return 1; |
| 240 | +#endif /* defined (HAVE_GETADDRINFO) */ |
| 241 | +} |
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