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authorRaimo Niskanen <[email protected]>2010-10-04 15:12:10 +0200
committerRaimo Niskanen <[email protected]>2010-11-09 12:14:37 +0100
commitff7a4dbd6881e2434ed2619df541c113281cf0a0 (patch)
tree66fa2bc23e1ae3af0bc58a067de0a27543f4b9ac /erts/emulator
parent989fa5de1889c3fd09e9b5e25c244e2a855bf0b5 (diff)
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Implement basic inet:getifaddrs/0
Diffstat (limited to 'erts/emulator')
-rw-r--r--erts/emulator/drivers/common/inet_drv.c387
1 files changed, 273 insertions, 114 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 493ebec6b9..4ee0e968d7 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -54,6 +54,9 @@
#ifdef HAVE_IFADDRS_H
#include <ifaddrs.h>
#endif
+#ifdef HAVE_NETPACKET_PACKET_H
+#include <netpacket/packet.h>
+#endif
/* All platforms fail on malloc errors. */
#define FATAL_MALLOC
@@ -467,6 +470,7 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
#define INET_REQ_IFGET 22
#define INET_REQ_IFSET 23
#define INET_REQ_SUBSCRIBE 24
+#define INET_REQ_GETIFADDRS 25
/* TCP requests */
#define TCP_REQ_ACCEPT 40
#define TCP_REQ_LISTEN 41
@@ -3824,21 +3828,40 @@ do { if ((end)-(ptr) < (n)) goto error; } while(0)
static char* sockaddr_to_buf(struct sockaddr* addr, char* ptr, char* end)
{
if (addr->sa_family == AF_INET || addr->sa_family == 0) {
- struct in_addr a;
- buf_check(ptr,end,sizeof(struct in_addr));
- a = ((struct sockaddr_in*) addr)->sin_addr;
- sys_memcpy(ptr, (char*)&a, sizeof(struct in_addr));
- return ptr + sizeof(struct in_addr);
+ struct in_addr *p = &(((struct sockaddr_in*) addr)->sin_addr);
+ buf_check(ptr, end, 1 + sizeof(struct in_addr));
+ *ptr = INET_AF_INET;
+ sys_memcpy(ptr+1, (char*)p, sizeof(struct in_addr));
+ return ptr + 1 + sizeof(struct in_addr);
}
#if defined(HAVE_IN6) && defined(AF_INET6)
else if (addr->sa_family == AF_INET6) {
- struct in6_addr a;
- buf_check(ptr,end,sizeof(struct in6_addr));
- a = ((struct sockaddr_in6*) addr)->sin6_addr;
- sys_memcpy(ptr, (char*)&a, sizeof(struct in6_addr));
- return ptr + sizeof(struct in6_addr);
+ struct in6_addr *p = &(((struct sockaddr_in6*) addr)->sin6_addr);
+ buf_check(ptr, end, 1 + sizeof(struct in6_addr));
+ *ptr = INET_AF_INET6;
+ sys_memcpy(ptr+1, (char*)p, sizeof(struct in6_addr));
+ return ptr + 1 + sizeof(struct in6_addr);
+ }
+#endif
+#if defined(AF_LINK)
+ else if (addr->sa_family == AF_LINK) {
+ struct sockaddr_dl *sdl_p = (struct sockaddr_dl*) addr;
+ buf_check(ptr, end, 2 + sdl_p->sdl_alen);
+ put_int16(sdl_p->sdl_alen, ptr); ptr += 2;
+ sys_memcpy(ptr, sdl_p->sdl_data + sdl_p->sdl_nlen, sdl_p->sdl_alen);
+ return ptr + sdl_p->sdl_alen;
}
#endif
+#if defined(AF_PACKET) && defined(HAVE_NETPACKET_PACKET_H)
+ else if(addr->sa_family == AF_PACKET) {
+ struct sockaddr_ll *sll_p = (struct sockaddr_ll*) addr;
+ buf_check(ptr, end, 2 + sll_p->sll_halen);
+ put_int16(sll_p->sll_halen, ptr); ptr += 2;
+ sys_memcpy(ptr, sll_p->sll_addr, sll_p->sll_halen);
+ return ptr + sll_p->sll_halen;
+ }
+#endif
+ return ptr;
error:
return NULL;
@@ -3846,12 +3869,23 @@ static char* sockaddr_to_buf(struct sockaddr* addr, char* ptr, char* end)
static char* buf_to_sockaddr(char* ptr, char* end, struct sockaddr* addr)
{
- buf_check(ptr,end,sizeof(struct in_addr));
- sys_memcpy((char*) &((struct sockaddr_in*)addr)->sin_addr, ptr,
- sizeof(struct in_addr));
- addr->sa_family = AF_INET;
- return ptr + sizeof(struct in_addr);
-
+ buf_check(ptr,end,1);
+ switch (*ptr++) {
+ case INET_AF_INET: {
+ struct in_addr *p = &((struct sockaddr_in*)addr)->sin_addr;
+ buf_check(ptr,end,sizeof(struct in_addr));
+ sys_memcpy((char*) p, ptr, sizeof(struct in_addr));
+ addr->sa_family = AF_INET;
+ return ptr + sizeof(struct in_addr);
+ }
+ case INET_AF_INET6: {
+ struct in6_addr *p = &((struct sockaddr_in6*)addr)->sin6_addr;
+ buf_check(ptr,end,sizeof(struct in6_addr));
+ sys_memcpy((char*) p, ptr, sizeof(struct in6_addr));
+ addr->sa_family = AF_INET6;
+ return ptr + sizeof(struct in6_addr);
+ }
+ }
error:
return NULL;
}
@@ -3894,7 +3928,6 @@ static int inet_ctl_getiflist(inet_descriptor* desc, char** rbuf, int rsize)
return ctl_reply(INET_REP_OK, sbuf, sptr - sbuf, rbuf, rsize);
}
-
/* input is an ip-address in string format i.e A.B.C.D
** scan the INTERFACE_LIST to get the options
*/
@@ -3980,27 +4013,12 @@ static int inet_ctl_ifget(inet_descriptor* desc, char* buf, int len,
break;
case INET_IFOPT_FLAGS: {
- long eflags = 0;
int flags = ifp->iiFlags;
/* just enumerate the interfaces (no names) */
- /* translate flags */
- if (flags & IFF_UP)
- eflags |= INET_IFF_UP;
- if (flags & IFF_BROADCAST)
- eflags |= INET_IFF_BROADCAST;
- if (flags & IFF_LOOPBACK)
- eflags |= INET_IFF_LOOPBACK;
- if (flags & IFF_POINTTOPOINT)
- eflags |= INET_IFF_POINTTOPOINT;
- if (flags & IFF_UP) /* emulate runnign ? */
- eflags |= INET_IFF_RUNNING;
- if (flags & IFF_MULTICAST)
- eflags |= INET_IFF_MULTICAST;
-
buf_check(sptr, s_end, 5);
*sptr++ = INET_IFOPT_FLAGS;
- put_int32(eflags, sptr);
+ put_int32(IFGET_FLAGS(flags), sptr);
sptr += 4;
break;
}
@@ -4021,7 +4039,6 @@ static int inet_ctl_ifset(inet_descriptor* desc, char* buf, int len,
return ctl_reply(INET_REP_OK, NULL, 0, rbuf, rsize);
}
-
#elif defined(SIOCGIFCONF) && defined(SIOCSIFFLAGS)
/* cygwin has SIOCGIFCONF but not SIOCSIFFLAGS (Nov 2002) */
@@ -4032,74 +4049,90 @@ static int inet_ctl_ifset(inet_descriptor* desc, char* buf, int len,
#define SIZEA(p) (sizeof (p))
#endif
-
-static int inet_ctl_getiflist(inet_descriptor* desc, char** rbuf, int rsize)
-{
- struct ifconf ifc;
- struct ifreq *ifr;
- char *buf;
- int buflen, ifc_len, i;
- char *sbuf, *sp;
-
- /* Courtesy of Per Bergqvist and W. Richard Stevens */
-
- ifc_len = 0;
- buflen = 100 * sizeof(struct ifreq);
- buf = ALLOC(buflen);
+static int get_ifconf(SOCKET s, struct ifconf *ifcp) {
+ int ifc_len = 0;
+ int buflen = 100 * sizeof(struct ifreq);
+ char *buf = ALLOC(buflen);
for (;;) {
- ifc.ifc_len = buflen;
- ifc.ifc_buf = buf;
- if (ioctl(desc->s, SIOCGIFCONF, (char *)&ifc) < 0) {
+ ifcp->ifc_len = buflen;
+ ifcp->ifc_buf = buf;
+ if (ioctl(s, SIOCGIFCONF, (char *)ifcp) < 0) {
int res = sock_errno();
if (res != EINVAL || ifc_len) {
FREE(buf);
- return ctl_error(res, rbuf, rsize);
+ return -1;
}
} else {
- if (ifc.ifc_len == ifc_len) break; /* buf large enough */
- ifc_len = ifc.ifc_len;
+ if (ifcp->ifc_len == ifc_len) break; /* buf large enough */
+ ifc_len = ifcp->ifc_len;
}
buflen += 10 * sizeof(struct ifreq);
buf = (char *)REALLOC(buf, buflen);
}
-
- sp = sbuf = ALLOC(ifc_len+1);
+ return 0;
+}
+
+static void free_ifconf(struct ifconf *ifcp) {
+ FREE(ifcp->ifc_buf);
+}
+
+static int inet_ctl_getiflist(inet_descriptor* desc, char** rbuf, int rsize)
+{
+ struct ifconf ifc;
+ struct ifreq *ifrp;
+ char *sbuf, *sp;
+ int i;
+
+ /* Courtesy of Per Bergqvist and W. Richard Stevens */
+
+ if (get_ifconf(desc->s, &ifc) < 0) {
+ return ctl_error(sock_errno(), rbuf, rsize);
+ }
+
+ sp = sbuf = ALLOC(ifc.ifc_len+1);
*sp++ = INET_REP_OK;
i = 0;
for (;;) {
int n;
-
- ifr = (struct ifreq *) VOIDP(buf + i);
- n = sizeof(ifr->ifr_name) + SIZEA(ifr->ifr_addr);
- if (n < sizeof(*ifr)) n = sizeof(*ifr);
- if (i+n > ifc_len) break;
+
+ ifrp = (struct ifreq *) VOIDP(ifc.ifc_buf + i);
+ n = sizeof(ifrp->ifr_name) + SIZEA(ifrp->ifr_addr);
+ if (n < sizeof(*ifrp)) n = sizeof(*ifrp);
+ if (i+n > ifc.ifc_len) break;
i += n;
-
- switch (ifr->ifr_addr.sa_family) {
+
+ switch (ifrp->ifr_addr.sa_family) {
#if defined(HAVE_IN6) && defined(AF_INET6)
case AF_INET6:
#endif
case AF_INET:
- ASSERT(sp+IFNAMSIZ+1 < sbuf+buflen+1)
- strncpy(sp, ifr->ifr_name, IFNAMSIZ);
+ ASSERT(sp+IFNAMSIZ+1 < sbuf+ifc.ifc_len+1)
+ strncpy(sp, ifrp->ifr_name, IFNAMSIZ);
sp[IFNAMSIZ] = '\0';
sp += strlen(sp), ++sp;
}
-
- if (i >= ifc_len) break;
+
+ if (i >= ifc.ifc_len) break;
}
- FREE(buf);
+ free_ifconf(&ifc);
*rbuf = sbuf;
return sp - sbuf;
}
-
/* FIXME: temporary hack */
#ifndef IFHWADDRLEN
#define IFHWADDRLEN 6
#endif
+#define IFGET_FLAGS(cflags) \
+ ((((cflags) & IFF_UP) ? INET_IFF_UP : 0) | \
+ (((cflags) & IFF_BROADCAST) ? INET_IFF_BROADCAST : 0) | \
+ (((cflags) & IFF_LOOPBACK) ? INET_IFF_LOOPBACK : 0) | \
+ (((cflags) & IFF_POINTOPOINT) ? INET_IFF_POINTTOPOINT : 0) | \
+ (((cflags) & IFF_UP) ? INET_IFF_RUNNING : 0) | /* emulate running ? */ \
+ (((cflags) & IFF_MULTICAST) ? INET_IFF_MULTICAST : 0))
+
static int inet_ctl_ifget(inet_descriptor* desc, char* buf, int len,
char** rbuf, int rsize)
{
@@ -4133,37 +4166,52 @@ static int inet_ctl_ifget(inet_descriptor* desc, char* buf, int len,
#ifdef SIOCGIFHWADDR
if (ioctl(desc->s, SIOCGIFHWADDR, (char *)&ifreq) < 0)
break;
- buf_check(sptr, s_end, 1+IFHWADDRLEN);
+ buf_check(sptr, s_end, 1+2+IFHWADDRLEN);
*sptr++ = INET_IFOPT_HWADDR;
+ put_int16(IFHWADDRLEN, sptr); sptr += 2;
/* raw memcpy (fix include autoconf later) */
sys_memcpy(sptr, (char*)(&ifreq.ifr_hwaddr.sa_data), IFHWADDRLEN);
sptr += IFHWADDRLEN;
-#elif defined(HAVE_GETIFADDRS)
- struct ifaddrs *ifa, *ifp;
- int found = 0;
-
- if (getifaddrs(&ifa) == -1)
- goto error;
-
- for (ifp = ifa; ifp; ifp = ifp->ifa_next) {
- if ((ifp->ifa_addr->sa_family == AF_LINK) &&
- (sys_strcmp(ifp->ifa_name, ifreq.ifr_name) == 0)) {
- found = 1;
- break;
- }
- }
+#elif defined(SIOCGENADDR)
+ if (ioctl(desc->s, SIOCGENADDR, (char *)&ifreq) < 0)
+ break;
+ buf_check(sptr, s_end, 1+2+sizeof(ifreq.ifr_enaddr));
+ *sptr++ = INET_IFOPT_HWADDR;
+ put_int16(sizeof(ifreq.ifr_enaddr), sptr); sptr += 2;
+ /* raw memcpy (fix include autoconf later) */
+ sys_memcpy(sptr, (char*)(&ifreq.ifr_enaddr),
+ sizeof(ifreq.ifr_enaddr));
+ sptr += sizeof(ifreq.ifr_enaddr);
+#elif defined(HAVE_GETIFADDRS) && defined(AF_LINK)
+ struct ifaddrs *ifa, *ifp;
+ struct sockaddr_dl *sdlp;
+ int found = 0;
+
+ if (getifaddrs(&ifa) == -1)
+ goto error;
- if (found == 0) {
- freeifaddrs(ifa);
- break;
- }
+ for (ifp = ifa; ifp; ifp = ifp->ifa_next) {
+ if ((ifp->ifa_addr->sa_family == AF_LINK) &&
+ (sys_strcmp(ifp->ifa_name, ifreq.ifr_name) == 0)) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (found == 0) {
+ freeifaddrs(ifa);
+ break;
+ }
+ sdlp = (struct sockaddr_dl *)ifp->ifa_addr;
- buf_check(sptr, s_end, 1+IFHWADDRLEN);
- *sptr++ = INET_IFOPT_HWADDR;
- sys_memcpy(sptr, ((struct sockaddr_dl *)ifp->ifa_addr)->sdl_data +
- ((struct sockaddr_dl *)ifp->ifa_addr)->sdl_nlen, IFHWADDRLEN);
- freeifaddrs(ifa);
- sptr += IFHWADDRLEN;
+ buf_check(sptr, s_end, 1+2+sdlp->sdl_alen);
+ *sptr++ = INET_IFOPT_HWADDR;
+ put_int16(sdlp->sdl_alen, sptr); sptr += 2;
+ sys_memcpy(sptr,
+ sdlp->sdl_data + sdlp->sdl_nlen,
+ sdlp->sdl_alen);
+ freeifaddrs(ifa);
+ sptr += sdlp->sdl_alen;
#endif
break;
}
@@ -4240,29 +4288,15 @@ static int inet_ctl_ifget(inet_descriptor* desc, char* buf, int len,
case INET_IFOPT_FLAGS: {
int flags;
- int eflags = 0;
if (ioctl(desc->s, SIOCGIFFLAGS, (char*)&ifreq) < 0)
flags = 0;
else
flags = ifreq.ifr_flags;
- /* translate flags */
- if (flags & IFF_UP)
- eflags |= INET_IFF_UP;
- if (flags & IFF_BROADCAST)
- eflags |= INET_IFF_BROADCAST;
- if (flags & IFF_LOOPBACK)
- eflags |= INET_IFF_LOOPBACK;
- if (flags & IFF_POINTOPOINT)
- eflags |= INET_IFF_POINTTOPOINT;
- if (flags & IFF_RUNNING)
- eflags |= INET_IFF_RUNNING;
- if (flags & IFF_MULTICAST)
- eflags |= INET_IFF_MULTICAST;
buf_check(sptr, s_end, 5);
*sptr++ = INET_IFOPT_FLAGS;
- put_int32(eflags, sptr);
+ put_int32(IFGET_FLAGS(flags), sptr);
sptr += 4;
break;
}
@@ -4300,17 +4334,22 @@ static int inet_ctl_ifset(inet_descriptor* desc, char* buf, int len,
(void) ioctl(desc->s, SIOCSIFADDR, (char*)&ifreq);
break;
- case INET_IFOPT_HWADDR:
- buf_check(buf, b_end, IFHWADDRLEN);
+ case INET_IFOPT_HWADDR: {
+ unsigned int len;
+ buf_check(buf, b_end, 2);
+ len = get_int16(buf); buf += 2;
+ buf_check(buf, b_end, len);
#ifdef SIOCSIFHWADDR
/* raw memcpy (fix include autoconf later) */
- sys_memcpy((char*)(&ifreq.ifr_hwaddr.sa_data), buf, IFHWADDRLEN);
+ sys_memset((char*)(&ifreq.ifr_hwaddr.sa_data),
+ '\0', sizeof(ifreq.ifr_hwaddr.sa_data));
+ sys_memcpy((char*)(&ifreq.ifr_hwaddr.sa_data), buf, len);
(void) ioctl(desc->s, SIOCSIFHWADDR, (char *)&ifreq);
#endif
- buf += IFHWADDRLEN;
+ buf += len;
break;
-
+ }
case INET_IFOPT_BROADADDR:
#ifdef SIOCSIFBRDADDR
@@ -4415,6 +4454,119 @@ static int inet_ctl_ifset(inet_descriptor* desc, char* buf, int len,
#endif
+
+
+#if defined(HAVE_GETIFADDRS)
+
+static int inet_ctl_getifaddrs(inet_descriptor* desc_p,
+ char **rbuf_pp, int rsize)
+{
+ struct ifaddrs *ifa_p, *ifa_free_p;
+
+ int buf_size;
+ char *buf_p;
+ char *buf_alloc_p;
+
+ buf_size = 512;
+ buf_alloc_p = ALLOC(buf_size);
+ buf_p = buf_alloc_p;
+# define BUF_ENSURE(Size) \
+ do { \
+ int need, got = buf_p - buf_alloc_p; \
+ need = got + (Size); \
+ if (need > buf_size) { \
+ buf_size = need + 512; \
+ buf_alloc_p = REALLOC(buf_alloc_p, buf_size); \
+ buf_p = buf_alloc_p + got; \
+ } \
+ } while(0)
+# define SOCKADDR_TO_BUF(opt, sa) \
+ do { \
+ if (sa) { \
+ char *p; \
+ *buf_p++ = (opt); \
+ while (! (p = sockaddr_to_buf((sa), buf_p, \
+ buf_alloc_p+buf_size))) { \
+ int got = buf_p - buf_alloc_p; \
+ buf_alloc_p = REALLOC(buf_alloc_p, buf_size+512); \
+ buf_p = buf_alloc_p + got; \
+ } \
+ if (p == buf_p) { \
+ buf_p--; \
+ } else { \
+ buf_p = p; \
+ } \
+ } \
+ } while (0)
+
+ if (getifaddrs(&ifa_p) < 0) {
+ return ctl_error(sock_errno(), rbuf_pp, rsize);
+ }
+ ifa_free_p = ifa_p;
+ *buf_p++ = INET_REP_OK;
+ for (; ifa_p; ifa_p = ifa_p->ifa_next) {
+ int len = strlen(ifa_p->ifa_name) + 1;
+ BUF_ENSURE(len + 1+4 + 1);
+ sys_memcpy(buf_p, ifa_p->ifa_name, len);
+ buf_p += len;
+ *buf_p++ = INET_IFOPT_FLAGS;
+ put_int32(IFGET_FLAGS(ifa_p->ifa_flags), buf_p);
+ buf_p += 4;
+ if (ifa_p->ifa_addr->sa_family == AF_INET
+#if defined(AF_INET6)
+ || ifa_p->ifa_addr->sa_family == AF_INET6
+#endif
+ ) {
+ SOCKADDR_TO_BUF(INET_IFOPT_ADDR, ifa_p->ifa_addr);
+ BUF_ENSURE(1);
+ SOCKADDR_TO_BUF(INET_IFOPT_NETMASK, ifa_p->ifa_netmask);
+ if (ifa_p->ifa_flags & IFF_POINTOPOINT) {
+ BUF_ENSURE(1);
+ SOCKADDR_TO_BUF(INET_IFOPT_DSTADDR, ifa_p->ifa_dstaddr);
+ } else if (ifa_p->ifa_flags & IFF_BROADCAST) {
+ BUF_ENSURE(1);
+ SOCKADDR_TO_BUF(INET_IFOPT_BROADADDR, ifa_p->ifa_broadaddr);
+ }
+ }
+#if defined(AF_LINK) || defined(AF_PACKET)
+ else if (
+#if defined(AF_LINK)
+ ifa_p->ifa_addr->sa_family == AF_LINK
+#else
+ 0
+#endif
+#if defined(AF_PACKET)
+ || ifa_p->ifa_addr->sa_family == AF_PACKET
+#endif
+ ) {
+ BUF_ENSURE(1);
+ SOCKADDR_TO_BUF(INET_IFOPT_HWADDR, ifa_p->ifa_addr);
+ }
+#endif
+ BUF_ENSURE(1);
+ *buf_p++ = '\0';
+ }
+ buf_size = buf_p - buf_alloc_p;
+ buf_alloc_p = REALLOC(buf_alloc_p, buf_size);
+ /* buf_p is now unreliable */
+ freeifaddrs(ifa_free_p);
+ *rbuf_pp = buf_alloc_p;
+ return buf_size;
+# undef BUF_ENSURE
+}
+
+#else
+
+static int inet_ctl_getifaddrs(inet_descriptor* desc_p,
+ char **rbuf_pp, int rsize)
+{
+ return ctl_error(ENOTSUP, rbuf_pp, rsize);
+}
+
+#endif
+
+
+
#ifdef VXWORKS
/*
** THIS is a terrible creature, a bug in the TCP part
@@ -6681,6 +6833,13 @@ static int inet_ctl(inet_descriptor* desc, int cmd, char* buf, int len,
return inet_ctl_getiflist(desc, rbuf, rsize);
}
+ case INET_REQ_GETIFADDRS: {
+ DEBUGF(("inet_ctl(%ld): GETIFADDRS\r\n", (long)desc->port));
+ if (!IS_OPEN(desc))
+ return ctl_xerror(EXBADPORT, rbuf, rsize);
+ return inet_ctl_getifaddrs(desc, rbuf, rsize);
+ }
+
case INET_REQ_IFGET: {
DEBUGF(("inet_ctl(%ld): IFGET\r\n", (long)desc->port));
if (!IS_OPEN(desc))