diff options
author | bz <bz@FreeBSD.org> | 2006-12-29 19:23:38 +0000 |
---|---|---|
committer | bz <bz@FreeBSD.org> | 2006-12-29 19:23:38 +0000 |
commit | 999db60bea69bac2697a664720778809a734add1 (patch) | |
tree | d75d4e3baa69ac0a30b995e0e917904e3fe9c258 /usr.sbin | |
parent | 7c57814bdcf673bb4e3961b662c3dbf11a8f9c7e (diff) | |
download | FreeBSD-src-999db60bea69bac2697a664720778809a734add1.zip FreeBSD-src-999db60bea69bac2697a664720778809a734add1.tar.gz |
bridge_snmp.h
* 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
Diffstat (limited to 'usr.sbin')
-rw-r--r-- | usr.sbin/bsnmpd/modules/snmp_bridge/bridge_if.c | 21 | ||||
-rw-r--r-- | usr.sbin/bsnmpd/modules/snmp_bridge/bridge_snmp.h | 2 | ||||
-rw-r--r-- | usr.sbin/bsnmpd/modules/snmp_bridge/bridge_sys.c | 142 |
3 files changed, 90 insertions, 75 deletions
diff --git a/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_if.c b/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_if.c index 950b2f7..4586e32 100644 --- a/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_if.c +++ b/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_if.c @@ -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) diff --git a/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_snmp.h b/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_snmp.h index 2a8b294..b6f213b 100644 --- a/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_snmp.h +++ b/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_snmp.h @@ -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, diff --git a/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_sys.c b/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_sys.c index a5d090d..a43b676 100644 --- a/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_sys.c +++ b/usr.sbin/bsnmpd/modules/snmp_bridge/bridge_sys.c @@ -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; + + /* + * 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) + 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); |