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bridge_snmp.h

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* Change the API of bridge_get_basemac to take a maximum buffer length.

bridge_if.c
* Adopt to new API.
* In bridge_attach_newif() remove an additional pointer to the buffer
  by shuffling the code a bit. Also makes the code more readable.

bridge_sys.c
* bridge_get_basemac():
  - Adopt to the new API.
  - Change check for error code of getifaddrs().
  - First check for sa_family != AF_LINK.
  - Copy sockaddr_dl * to get around alignment constraints on some
    platforms.
  - Use strcmp instead of strncmp so that "foo11" != "foo1".
* other functions:
  - Allocate n times of the struct we need instead of arbitrary len,
    cast to the type we want it to be and pass around struct *s instead
    of char *s. This gets us around alignment restrictions on some
    platforms and in addition it is more clear what data is passed around.
  - Name variables for same types consistently.

Reviewed by:    syrinx
This commit is contained in:
Bjoern A. Zeeb 2006-12-29 19:23:38 +00:00
parent 3ca72aeb09
commit a245531a29
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=165642
3 changed files with 90 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
usr.sbin/bsnmpd/modules/snmp_bridge/bridge_if.c
View File

@ -399,7 +399,8 @@ bridge_update_bif(struct bridge_if *bif)
if (ifp->physaddr != NULL )
bcopy(ifp->physaddr, bif->br_addr.octet, ETHER_ADDR_LEN);
else
bridge_get_basemac(bif->bif_name, bif->br_addr.octet);
bridge_get_basemac(bif->bif_name, bif->br_addr.octet,
ETHER_ADDR_LEN);
if (ifp->mib.ifmd_flags & IFF_RUNNING)
bif->if_status = RowStatus_active;
@ -563,7 +564,7 @@ bridge_update_tc_time(void *arg __unused)
int
bridge_attach_newif(struct mibif *ifp)
{
u_char *p_mac, mac[ETHER_ADDR_LEN];
u_char mac[ETHER_ADDR_LEN];
struct bridge_if *bif;
if (ifp->mib.ifmd_data.ifi_type != IFT_BRIDGE)
@ -577,14 +578,16 @@ bridge_attach_newif(struct mibif *ifp)
return (-1);
}
if ((p_mac = ifp->physaddr) == NULL &&
(p_mac = bridge_get_basemac(ifp->name, mac)) == NULL) {
syslog(LOG_ERR, "bridge attach new %s failed - "
"no bridge mac address", ifp->name);
return (-1);
}
if (ifp->physaddr == NULL) {
if (bridge_get_basemac(ifp->name, mac, sizeof(mac)) == NULL) {
syslog(LOG_ERR, "bridge attach new %s failed - "
"no bridge mac address", ifp->name);
return (-1);
}
} else
bcopy(ifp->physaddr, &mac, sizeof(mac));
if ((bif = bridge_new_bif(ifp->name, ifp->sysindex, p_mac)) == NULL)
if ((bif = bridge_new_bif(ifp->name, ifp->sysindex, mac)) == NULL)
return (-1);
if (ifp->mib.ifmd_flags & IFF_RUNNING)

2
usr.sbin/bsnmpd/modules/snmp_bridge/bridge_snmp.h
View File

@ -315,7 +315,7 @@ int bridge_create(const char *b_name);
int bridge_destroy(const char *b_name);
/* Fetch the bridge mac address. */
u_char *bridge_get_basemac(const char *bif_name, u_char *mac);
u_char *bridge_get_basemac(const char *bif_name, u_char *mac, size_t mlen);
/* Set a bridge member priority. */
int bridge_port_set_priority(const char *bif_name, struct bridge_port *bp,

142
usr.sbin/bsnmpd/modules/snmp_bridge/bridge_sys.c
View File

@ -576,35 +576,43 @@ bridge_destroy(const char *b_name)
/*
* Fetch the bridge base MAC address. Return pointer to the
* buffer containing the mac address, NULL on failure.
* buffer containing the MAC address, NULL on failure.
*/
u_char *
bridge_get_basemac(const char *bif_name, u_char *mac)
bridge_get_basemac(const char *bif_name, u_char *mac, size_t mlen)
{
int len;
char if_name[IFNAMSIZ];
struct ifaddrs *ifap, *tmp;
struct sockaddr_dl *sdl;
struct ifaddrs *ifap, *ifa;
struct sockaddr_dl sdl;
if (getifaddrs(&ifap) < 0) {
if (getifaddrs(&ifap) != 0) {
syslog(LOG_ERR, "bridge get mac: getifaddrs() failed - %s",
strerror(errno));
return (NULL);
}
for (tmp = ifap; tmp != NULL; tmp = tmp->ifa_next) {
sdl = (struct sockaddr_dl *) tmp->ifa_addr;
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_LINK)
continue;
if ((len = sdl->sdl_nlen) >= IFNAMSIZ)
/*
* Not just casting because of alignment constraints
* on sparc64 and ia64.
*/
bcopy(ifa->ifa_addr, &sdl, sizeof(struct sockaddr_dl));
if (sdl.sdl_alen > mlen)
continue;
if ((len = sdl.sdl_nlen) >= IFNAMSIZ)
len = IFNAMSIZ - 1;
bcopy(sdl->sdl_data, if_name, len);
bcopy(sdl.sdl_data, if_name, len);
if_name[len] = '\0';
if (sdl->sdl_family == AF_LINK && !strncmp(bif_name,
if_name, strlen(bif_name))) {
bcopy(sdl->sdl_data + sdl->sdl_nlen, mac,
ETHER_ADDR_LEN);
if (strcmp(bif_name, if_name) == 0) {
bcopy(sdl.sdl_data + sdl.sdl_nlen, mac, sdl.sdl_alen);
freeifaddrs(ifap);
return (mac);
}
@ -1024,10 +1032,11 @@ bridge_port_delm(struct bridge_port *bp, const char *b_name)
* Return -1 on error, or buffer len if successful.
*/
static int32_t
bridge_port_get_iflist(struct bridge_if *bif, char **buf)
bridge_port_get_iflist(struct bridge_if *bif, struct ifbreq **buf)
{
uint32_t len = 8192; /* ??? */
char *ninbuf;
int n = 128;
uint32_t len;
struct ifbreq *ninbuf;
struct ifbifconf ifbc;
struct ifdrv ifd;
@ -1038,7 +1047,8 @@ bridge_port_get_iflist(struct bridge_if *bif, char **buf)
ifd.ifd_data = &ifbc;
for ( ; ; ) {
if ((ninbuf = realloc(*buf, len) /* ??? */) == NULL) {
len = n * sizeof(struct ifbreq);
if ((ninbuf = (struct ifbreq *)realloc(*buf, len)) == NULL) {
syslog(LOG_ERR, "get bridge member list: "
"realloc failed: %s", strerror(errno));
free(*buf);
@ -1047,7 +1057,7 @@ bridge_port_get_iflist(struct bridge_if *bif, char **buf)
}
ifbc.ifbic_len = len;
ifbc.ifbic_buf = *buf = ninbuf;
ifbc.ifbic_req = *buf = ninbuf;
if (ioctl(sock, SIOCGDRVSPEC, &ifd) < 0) {
syslog(LOG_ERR, "get bridge member list: ioctl "
@ -1060,7 +1070,7 @@ bridge_port_get_iflist(struct bridge_if *bif, char **buf)
if ((ifbc.ifbic_len + sizeof(struct ifbreq)) < len)
break;
len += 8192;
n += 64;
}
return (ifbc.ifbic_len);
@ -1071,10 +1081,11 @@ bridge_port_get_iflist(struct bridge_if *bif, char **buf)
* Return -1 on error, or buffer len if successful.
*/
static int32_t
bridge_port_get_ifstplist(struct bridge_if *bif, char **buf)
bridge_port_get_ifstplist(struct bridge_if *bif, struct ifbpstpreq **buf)
{
uint32_t len = 8192; /* ??? */
char *ninbuf;
int n = 128;
uint32_t len;
struct ifbpstpreq *ninbuf;
struct ifbpstpconf ifbstp;
struct ifdrv ifd;
@ -1085,7 +1096,9 @@ bridge_port_get_ifstplist(struct bridge_if *bif, char **buf)
ifd.ifd_data = &ifbstp;
for ( ; ; ) {
if ((ninbuf = realloc(*buf, len) /* ??? */) == NULL) {
len = n * sizeof(struct ifbpstpreq);
if ((ninbuf = (struct ifbpstpreq *)
realloc(*buf, len)) == NULL) {
syslog(LOG_ERR, "get bridge STP ports list: "
"realloc failed: %s", strerror(errno));
free(*buf);
@ -1094,7 +1107,7 @@ bridge_port_get_ifstplist(struct bridge_if *bif, char **buf)
}
ifbstp.ifbpstp_len = len;
ifbstp.ifbpstp_buf = *buf = ninbuf;
ifbstp.ifbpstp_req = *buf = ninbuf;
if (ioctl(sock, SIOCGDRVSPEC, &ifd) < 0) {
syslog(LOG_ERR, "get bridge STP ports list: ioctl "
@ -1107,7 +1120,7 @@ bridge_port_get_ifstplist(struct bridge_if *bif, char **buf)
if ((ifbstp.ifbpstp_len + sizeof(struct ifbpstpreq)) < len)
break;
len += 8192;
n += 64;
}
return (ifbstp.ifbpstp_len);
@ -1117,13 +1130,14 @@ bridge_port_get_ifstplist(struct bridge_if *bif, char **buf)
* Locate a bridge if STP params structure in a buffer.
*/
static struct ifbpstpreq *
bridge_port_find_ifstplist(uint8_t port_no, char *buf, uint32_t buf_len)
bridge_port_find_ifstplist(uint8_t port_no, struct ifbpstpreq *buf,
uint32_t buf_len)
{
uint32_t i;
struct ifbpstpreq *bstp;
for (i = 0; i < buf_len / sizeof(*bstp); i++) {
bstp = (struct ifbpstpreq *) buf + i;
for (i = 0; i < buf_len / sizeof(struct ifbpstpreq); i++) {
bstp = buf + i;
if (bstp->ifbp_portno == port_no)
return (bstp);
}
@ -1141,17 +1155,16 @@ bridge_getinfo_bif_ports(struct bridge_if *bif)
{
uint32_t i;
int32_t buf_len;
char *mem_buf;
struct ifbreq *b_req;
struct ifbpstpreq *bs_req;
struct ifbreq *b_req_buf, *b_req;
struct ifbpstpreq *bs_req_buf, *bs_req;
struct bridge_port *bp;
struct mibif *m_if;
if ((buf_len = bridge_port_get_iflist(bif, &mem_buf)) < 0)
if ((buf_len = bridge_port_get_iflist(bif, &b_req_buf)) < 0)
return (-1);
for (i = 0; i < buf_len / sizeof(struct ifbreq); i++) {
b_req = (struct ifbreq *) mem_buf + i;
b_req = b_req_buf + i;
if ((m_if = mib_find_if_sys(b_req->ifbr_portno)) != NULL) {
/* Hopefully we will not fail here. */
@ -1165,20 +1178,20 @@ bridge_getinfo_bif_ports(struct bridge_if *bif)
"in mibII ifTable", b_req->ifbr_ifsname);
}
}
free(mem_buf);
free(b_req_buf);
if ((buf_len = bridge_port_get_ifstplist(bif, &mem_buf)) < 0)
if ((buf_len = bridge_port_get_ifstplist(bif, &bs_req_buf)) < 0)
return (-1);
for (bp = bridge_port_bif_first(bif); bp != NULL;
bp = bridge_port_bif_next(bp)) {
if ((bs_req = bridge_port_find_ifstplist(bp->port_no,
mem_buf, buf_len)) == NULL)
bs_req_buf, buf_len)) == NULL)
bridge_port_clearinfo_opstp(bp);
else
bridge_port_getinfo_opstp(bs_req, bp);
}
free(mem_buf);
free(bs_req_buf);
return (i);
}
@ -1192,20 +1205,19 @@ bridge_update_memif(struct bridge_if *bif)
int added, updated;
uint32_t i;
int32_t buf_len;
char *if_buf;
struct ifbreq *b_req;
struct ifbpstpreq *bs_req;
struct ifbreq *b_req_buf, *b_req;
struct ifbpstpreq *bs_req_buf, *bs_req;
struct bridge_port *bp, *bp_next;
struct mibif *m_if;
if ((buf_len = bridge_port_get_iflist(bif, &if_buf)) < 0)
if ((buf_len = bridge_port_get_iflist(bif, &b_req_buf)) < 0)
return (-1);
added = updated = 0;
#define BP_FOUND 0x01
for (i = 0; i < buf_len / sizeof(struct ifbreq); i++) {
b_req = (struct ifbreq *) if_buf + i;
b_req = b_req_buf + i;
if ((m_if = mib_find_if_sys(b_req->ifbr_portno)) == NULL) {
syslog(LOG_ERR, "bridge member %s not present "
@ -1226,7 +1238,7 @@ bridge_update_memif(struct bridge_if *bif)
bp->flags |= BP_FOUND;
}
}
free(if_buf);
free(b_req_buf);
/* Clean up list. */
for (bp = bridge_port_bif_first(bif); bp != NULL; bp = bp_next) {
@ -1240,18 +1252,18 @@ bridge_update_memif(struct bridge_if *bif)
}
#undef BP_FOUND
if ((buf_len = bridge_port_get_ifstplist(bif, &if_buf)) < 0)
if ((buf_len = bridge_port_get_ifstplist(bif, &bs_req_buf)) < 0)
return (-1);
for (bp = bridge_port_bif_first(bif); bp != NULL;
bp = bridge_port_bif_next(bp)) {
if ((bs_req = bridge_port_find_ifstplist(bp->port_no,
if_buf, buf_len)) == NULL)
bs_req_buf, buf_len)) == NULL)
bridge_port_clearinfo_opstp(bp);
else
bridge_port_getinfo_opstp(bs_req, bp);
}
free(if_buf);
free(bs_req_buf);
bif->ports_age = time(NULL);
return (updated);
@ -1280,10 +1292,11 @@ bridge_addrs_info_ifaddrlist(struct ifbareq *ifba, struct tp_entry *tpe)
* Return -1 on error, or buffer len if successful.
*/
static int32_t
bridge_addrs_getinfo_ifalist(struct bridge_if *bif, char **buf)
bridge_addrs_getinfo_ifalist(struct bridge_if *bif, struct ifbareq **buf)
{
uint32_t len = 8192; /* ??? */
char *ninbuf;
int n = 128;
uint32_t len;
struct ifbareq *ninbuf;
struct ifbaconf bac;
struct ifdrv ifd;
@ -1294,7 +1307,8 @@ bridge_addrs_getinfo_ifalist(struct bridge_if *bif, char **buf)
ifd.ifd_data = &bac;
for ( ; ; ) {
if ((ninbuf = realloc(*buf, len) /* ??? */) == NULL) {
len = n * sizeof(struct ifbareq);
if ((ninbuf = (struct ifbareq *)realloc(*buf, len)) == NULL) {
syslog(LOG_ERR, "get bridge address list: "
" realloc failed: %s", strerror(errno));
free(*buf);
@ -1303,7 +1317,7 @@ bridge_addrs_getinfo_ifalist(struct bridge_if *bif, char **buf)
}
bac.ifbac_len = len;
bac.ifbac_buf = *buf = ninbuf;
bac.ifbac_req = *buf = ninbuf;
if (ioctl(sock, SIOCGDRVSPEC, &ifd) < 0) {
syslog(LOG_ERR, "get bridge address list: "
@ -1316,7 +1330,7 @@ bridge_addrs_getinfo_ifalist(struct bridge_if *bif, char **buf)
if ((bac.ifbac_len + sizeof(struct ifbareq)) < len)
break;
len += 8192;
n += 64;
}
return (bac.ifbac_len);
@ -1332,21 +1346,20 @@ bridge_getinfo_bif_addrs(struct bridge_if *bif)
{
uint32_t i;
int32_t buf_len;
char *addr_buf;
struct ifbareq *addr_req;
struct ifbareq *addr_req_buf, *addr_req;
struct tp_entry *te;
if ((buf_len = bridge_addrs_getinfo_ifalist(bif, &addr_buf)) < 0)
if ((buf_len = bridge_addrs_getinfo_ifalist(bif, &addr_req_buf)) < 0)
return (-1);
for (i = 0; i < buf_len / sizeof(struct ifbareq); i++) {
addr_req = (struct ifbareq *) addr_buf + i;
addr_req = addr_req_buf + i;
if ((te = bridge_new_addrs(addr_req->ifba_dst, bif)) != NULL)
bridge_addrs_info_ifaddrlist(addr_req, te);
}
free(addr_buf);
free(addr_req_buf);
return (i);
}
@ -1359,32 +1372,31 @@ bridge_update_addrs(struct bridge_if *bif)
int added, updated;
uint32_t i;
int32_t buf_len;
char *ifbad_buf;
struct tp_entry *te, *te_next;
struct ifbareq *a_req;
struct ifbareq *addr_req_buf, *addr_req;
if ((buf_len = bridge_addrs_getinfo_ifalist(bif, &ifbad_buf)) < 0)
if ((buf_len = bridge_addrs_getinfo_ifalist(bif, &addr_req_buf)) < 0)
return (-1);
added = updated = 0;
#define BA_FOUND 0x01
for (i = 0; i < buf_len / sizeof(struct ifbareq); i++) {
a_req = (struct ifbareq *) ifbad_buf + i;
addr_req = addr_req_buf + i;
if ((te = bridge_addrs_find(a_req->ifba_dst, bif)) == NULL) {
if ((te = bridge_addrs_find(addr_req->ifba_dst, bif)) == NULL) {
added++;
if ((te = bridge_new_addrs(a_req->ifba_dst, bif))
if ((te = bridge_new_addrs(addr_req->ifba_dst, bif))
== NULL)
continue;
} else
updated++;
bridge_addrs_info_ifaddrlist(a_req, te);
bridge_addrs_info_ifaddrlist(addr_req, te);
te-> flags |= BA_FOUND;
}
free(ifbad_buf);
free(addr_req_buf);
for (te = bridge_addrs_bif_first(bif); te != NULL; te = te_next) {
te_next = bridge_addrs_bif_next(te);