From 8c1bd9b6a5056260393024a8d666f9367fac4885 Mon Sep 17 00:00:00 2001 From: Christian Marangi Date: Tue, 13 Jun 2023 23:19:02 +0200 Subject: [PATCH] ppp: backport patches improving ppp interface creation Backport patches improving ppp interface creation. As a side effect this also fix a bug from using netdev trigger that suffer from LED state wrongly set due to using old ioctl for ppp creation. Tested-by: Csaba Sipos Signed-off-by: Christian Marangi --- package/network/services/ppp/Makefile | 2 +- ...tion-with-older-glibc-or-kernel-head.patch | 54 ++ ...byte-count-statistics-to-64-bits-298.patch | 518 ++++++++++++++++++ ...-for-registering-ppp-interface-via-L.patch | 299 ++++++++++ ...for-generating-ppp-unit-id-on-Linux-.patch | 59 ++ ...tering-interface-when-on-rtnetlink-E.patch | 218 ++++++++ .../ppp/patches/208-fix_status_code.patch | 2 +- ...multilink_support_custom_iface_names.patch | 4 +- .../330-retain_foreign_default_routes.patch | 2 +- .../340-populate_default_gateway.patch | 4 +- .../patches/400-simplify_kernel_checks.patch | 16 +- .../ppp/patches/401-no_record_file.patch | 2 +- .../services/ppp/patches/403-no_wtmp.patch | 4 +- .../404-remove_obsolete_protocol_names.patch | 16 +- 14 files changed, 1174 insertions(+), 26 deletions(-) create mode 100644 package/network/services/ppp/patches/140-pppd-Fix-compilation-with-older-glibc-or-kernel-head.patch create mode 100644 package/network/services/ppp/patches/141-Expand-byte-count-statistics-to-64-bits-298.patch create mode 100644 package/network/services/ppp/patches/142-pppd-Add-support-for-registering-ppp-interface-via-L.patch create mode 100644 package/network/services/ppp/patches/143-pppd-Workaround-for-generating-ppp-unit-id-on-Linux-.patch create mode 100644 package/network/services/ppp/patches/144-pppd-Retry-registering-interface-when-on-rtnetlink-E.patch diff --git a/package/network/services/ppp/Makefile b/package/network/services/ppp/Makefile index 80d5e46c34..40ec5c5cf1 100644 --- a/package/network/services/ppp/Makefile +++ b/package/network/services/ppp/Makefile @@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk include $(INCLUDE_DIR)/kernel.mk PKG_NAME:=ppp -PKG_RELEASE:=4 +PKG_RELEASE:=5 PKG_SOURCE_PROTO:=git PKG_SOURCE_URL:=https://github.com/paulusmack/ppp diff --git a/package/network/services/ppp/patches/140-pppd-Fix-compilation-with-older-glibc-or-kernel-head.patch b/package/network/services/ppp/patches/140-pppd-Fix-compilation-with-older-glibc-or-kernel-head.patch new file mode 100644 index 0000000000..154ac7270b --- /dev/null +++ b/package/network/services/ppp/patches/140-pppd-Fix-compilation-with-older-glibc-or-kernel-head.patch @@ -0,0 +1,54 @@ +From 98ec18f098e5ef68e3a8cc6954fcaf5a7fb8b7be Mon Sep 17 00:00:00 2001 +From: pali <7141871+pali@users.noreply.github.com> +Date: Mon, 15 Feb 2021 07:54:01 +0100 +Subject: [PATCH] pppd: Fix compilation with older glibc or kernel headers + (#248) +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +glibc versions prior to 2.24 do not define SOL_NETLINK and linux kernel +versions prior to 4.3 do not define NETLINK_CAP_ACK. So add fallback +definitions for these macros into pppd/sys-linux.c file. + +Also extend description why we call SOL_NETLINK/NETLINK_CAP_ACK option. + +Signed-off-by: Pali Rohár +--- + pppd/sys-linux.c | 18 +++++++++++++++++- + 1 file changed, 17 insertions(+), 1 deletion(-) + +--- a/pppd/sys-linux.c ++++ b/pppd/sys-linux.c +@@ -125,6 +125,14 @@ + #include + #include + #include ++/* glibc versions prior to 2.24 do not define SOL_NETLINK */ ++#ifndef SOL_NETLINK ++#define SOL_NETLINK 270 ++#endif ++/* linux kernel versions prior to 4.3 do not define/support NETLINK_CAP_ACK */ ++#ifndef NETLINK_CAP_ACK ++#define NETLINK_CAP_ACK 10 ++#endif + #endif + + #include "pppd.h" +@@ -2843,7 +2851,15 @@ static int append_peer_ipv6_address(unsi + if (fd < 0) + return 0; + +- /* do not ask for error message content */ ++ /* ++ * Tell kernel to not send to us payload of acknowledgment error message. ++ * NETLINK_CAP_ACK option is supported since Linux kernel version 4.3 and ++ * older kernel versions always send full payload in acknowledgment netlink ++ * message. We ignore payload of this message as we need only error code, ++ * to check if our set remote peer address request succeeded or failed. ++ * So ignore return value from the following setsockopt() call as setting ++ * option NETLINK_CAP_ACK means for us just a kernel hint / optimization. ++ */ + one = 1; + setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, &one, sizeof(one)); + diff --git a/package/network/services/ppp/patches/141-Expand-byte-count-statistics-to-64-bits-298.patch b/package/network/services/ppp/patches/141-Expand-byte-count-statistics-to-64-bits-298.patch new file mode 100644 index 0000000000..e4de5c0aa2 --- /dev/null +++ b/package/network/services/ppp/patches/141-Expand-byte-count-statistics-to-64-bits-298.patch @@ -0,0 +1,518 @@ +From 81ad945630120cc1c27c8bb00503be42b76ff202 Mon Sep 17 00:00:00 2001 +From: Jaco Kroon +Date: Thu, 13 Jan 2022 08:38:04 +0200 +Subject: [PATCH] Expand byte count statistics to 64 bits (#298) + +* Add Gigawords to radius packets where applicable. + +IMPORTANT NOTE: The ioctl() only supports 32-bit counters. In order t +obtain 64-bit counters, these are now pulled in from sysfs (it's assumed +to be mounted on /sys which I'm assuming is standard). + +It is unknown whether sysfs will be available everywhere, as such, keep +the ioctl() method in place, but attempt to detect wrap-overs. + +If the sysfs mechanism fails, fail back to the ioctl(). + +Given maximum data rates, the intervals between calling this needs to be +such that no more than 4GB (2^32) bytes are sent or received in any +given interval. Mostly important for radius plugin where data +accounting may be in effect. + +Towards this, a timer interval on 25 seconds is set to force a ioctl() +poll irrespective of the rate of stats update calls. This may be +important for especially radius that needs to provide interim-update +intervals, if the interim updates is too long and the counters could +wrap-over twice in a single interval. At 25 seconds we should detect +all wraps up to an effective data rate of 1.37Gbps, which for my +purposes is adequate. + +Possible downsides, 4 files are opened, read and closed every time +statistics is requested. This results in 12 system calls every single +time statistics is required, compared to 1 for the ioctl. Efficiency is +unknown, but as a rule of thumb fewer system calls are better, this is +however not a critical path in my opinion, so should not be a problem. +If required I can run a few benchmarks using gettimeofday() to measure +actual impact. + +Signed-off-by: Jaco Kroon + +* Use netlink if possible to obtain 64-bit stats. + +This uses two system calls per round. + +This should be preferred where available. It seems the RTM_GETSTATS was +only added from 2016 some point (4.7.0 as per pali), which is in my +opinion old, but given experience with certain embedded systems does +need to be supported. + +Signed-off-by: Jaco Kroon + +Co-authored-by: Jaco Kroon +--- + pppd/main.c | 5 +- + pppd/plugins/radius/etc/dictionary | 2 + + pppd/plugins/radius/radius.c | 28 ++- + pppd/plugins/radius/radiusclient.h | 2 + + pppd/pppd.h | 9 +- + pppd/sys-linux.c | 281 ++++++++++++++++++++++++++++- + 6 files changed, 313 insertions(+), 14 deletions(-) + +--- a/pppd/main.c ++++ b/pppd/main.c +@@ -87,6 +87,7 @@ + #include + #include + #include ++#include + + #include "pppd.h" + #include "magic.h" +@@ -1230,9 +1231,9 @@ update_link_stats(int u) + + slprintf(numbuf, sizeof(numbuf), "%u", link_connect_time); + script_setenv("CONNECT_TIME", numbuf, 0); +- slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_out); ++ snprintf(numbuf, sizeof(numbuf), "%" PRIu64, link_stats.bytes_out); + script_setenv("BYTES_SENT", numbuf, 0); +- slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_in); ++ snprintf(numbuf, sizeof(numbuf), "%" PRIu64, link_stats.bytes_in); + script_setenv("BYTES_RCVD", numbuf, 0); + } + +--- a/pppd/plugins/radius/etc/dictionary ++++ b/pppd/plugins/radius/etc/dictionary +@@ -82,6 +82,8 @@ ATTRIBUTE Acct-Session-Time 46 integer + ATTRIBUTE Acct-Input-Packets 47 integer + ATTRIBUTE Acct-Output-Packets 48 integer + ATTRIBUTE Acct-Terminate-Cause 49 integer ++ATTRIBUTE Acct-Input-Gigawords 52 integer ++ATTRIBUTE Acct-Output-Gigawords 53 integer + ATTRIBUTE Chap-Challenge 60 string + ATTRIBUTE NAS-Port-Type 61 integer + ATTRIBUTE Port-Limit 62 integer +--- a/pppd/plugins/radius/radius.c ++++ b/pppd/plugins/radius/radius.c +@@ -1020,12 +1020,22 @@ radius_acct_stop(void) + av_type = link_connect_time; + rc_avpair_add(&send, PW_ACCT_SESSION_TIME, &av_type, 0, VENDOR_NONE); + +- av_type = link_stats.bytes_out; ++ av_type = link_stats.bytes_out & 0xFFFFFFFF; + rc_avpair_add(&send, PW_ACCT_OUTPUT_OCTETS, &av_type, 0, VENDOR_NONE); + +- av_type = link_stats.bytes_in; ++ if (link_stats.bytes_out > 0xFFFFFFFF) { ++ av_type = link_stats.bytes_out >> 32; ++ rc_avpair_add(&send, PW_ACCT_OUTPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE); ++ } ++ ++ av_type = link_stats.bytes_in & 0xFFFFFFFF; + rc_avpair_add(&send, PW_ACCT_INPUT_OCTETS, &av_type, 0, VENDOR_NONE); + ++ if (link_stats.bytes_in > 0xFFFFFFFF) { ++ av_type = link_stats.bytes_in >> 32; ++ rc_avpair_add(&send, PW_ACCT_INPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE); ++ } ++ + av_type = link_stats.pkts_out; + rc_avpair_add(&send, PW_ACCT_OUTPUT_PACKETS, &av_type, 0, VENDOR_NONE); + +@@ -1172,12 +1182,22 @@ radius_acct_interim(void *ignored) + av_type = link_connect_time; + rc_avpair_add(&send, PW_ACCT_SESSION_TIME, &av_type, 0, VENDOR_NONE); + +- av_type = link_stats.bytes_out; ++ av_type = link_stats.bytes_out & 0xFFFFFFFF; + rc_avpair_add(&send, PW_ACCT_OUTPUT_OCTETS, &av_type, 0, VENDOR_NONE); + +- av_type = link_stats.bytes_in; ++ if (link_stats.bytes_out > 0xFFFFFFFF) { ++ av_type = link_stats.bytes_out >> 32; ++ rc_avpair_add(&send, PW_ACCT_OUTPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE); ++ } ++ ++ av_type = link_stats.bytes_in & 0xFFFFFFFF; + rc_avpair_add(&send, PW_ACCT_INPUT_OCTETS, &av_type, 0, VENDOR_NONE); + ++ if (link_stats.bytes_in > 0xFFFFFFFF) { ++ av_type = link_stats.bytes_in >> 32; ++ rc_avpair_add(&send, PW_ACCT_INPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE); ++ } ++ + av_type = link_stats.pkts_out; + rc_avpair_add(&send, PW_ACCT_OUTPUT_PACKETS, &av_type, 0, VENDOR_NONE); + +--- a/pppd/plugins/radius/radiusclient.h ++++ b/pppd/plugins/radius/radiusclient.h +@@ -184,6 +184,8 @@ typedef struct pw_auth_hdr + #define PW_ACCT_LINK_COUNT 51 /* integer */ + + /* From RFC 2869 */ ++#define PW_ACCT_INPUT_GIGAWORDS 52 /* integer */ ++#define PW_ACCT_OUTPUT_GIGAWORDS 53 /* integer */ + #define PW_ACCT_INTERIM_INTERVAL 85 /* integer */ + + /* Merit Experimental Extensions */ +--- a/pppd/pppd.h ++++ b/pppd/pppd.h +@@ -53,6 +53,7 @@ + #include /* for encrypt */ + #include /* for setkey */ + #include ++#include + #include /* for NGROUPS_MAX */ + #include /* for MAXPATHLEN and BSD4_4, if defined */ + #include /* for u_int32_t, if defined */ +@@ -173,8 +174,8 @@ struct permitted_ip { + * pppd needs. + */ + struct pppd_stats { +- unsigned int bytes_in; +- unsigned int bytes_out; ++ uint64_t bytes_in; ++ uint64_t bytes_out; + unsigned int pkts_in; + unsigned int pkts_out; + }; +@@ -347,7 +348,7 @@ extern char *max_tls_version; + extern unsigned int maxoctets; /* Maximum octetes per session (in bytes) */ + extern int maxoctets_dir; /* Direction : + 0 - in+out (default) +- 1 - in ++ 1 - in + 2 - out + 3 - max(in,out) */ + extern int maxoctets_timeout; /* Timeout for check of octets limit */ +@@ -356,7 +357,7 @@ extern int maxoctets_timeout; /* + #define PPP_OCTETS_DIRECTION_OUT 2 + #define PPP_OCTETS_DIRECTION_MAXOVERAL 3 + /* same as previos, but little different on RADIUS side */ +-#define PPP_OCTETS_DIRECTION_MAXSESSION 4 ++#define PPP_OCTETS_DIRECTION_MAXSESSION 4 + #endif + + #ifdef PPP_FILTER +--- a/pppd/sys-linux.c ++++ b/pppd/sys-linux.c +@@ -79,6 +79,7 @@ + #include + + #include ++#include + #include + #include + #include +@@ -92,6 +93,7 @@ + #include + #include + #include ++#include + + /* This is in netdevice.h. However, this compile will fail miserably if + you attempt to include netdevice.h because it has so many references +@@ -121,9 +123,19 @@ + #include + #include + +-#ifdef INET6 + #include + #include ++#include ++/* Attempt at retaining compile-support with older than 4.7 kernels, or kernels ++ * where RTM_NEWSTATS isn't defined for whatever reason. ++ */ ++#ifndef RTM_NEWSTATS ++#define RTM_NEWSTATS 92 ++#define RTM_GETSTATS 94 ++#define IFLA_STATS_LINK_64 1 ++#endif ++ ++#ifdef INET6 + #include + /* glibc versions prior to 2.24 do not define SOL_NETLINK */ + #ifndef SOL_NETLINK +@@ -1407,11 +1419,17 @@ get_idle_time(int u, struct ppp_idle *ip + + /******************************************************************** + * +- * get_ppp_stats - return statistics for the link. ++ * get_ppp_stats_iocl - return statistics for the link, using the ioctl() method, ++ * this only supports 32-bit counters, so need to count the wraps. + */ +-int +-get_ppp_stats(int u, struct pppd_stats *stats) ++static int ++get_ppp_stats_ioctl(int u, struct pppd_stats *stats) + { ++ static u_int32_t previbytes = 0; ++ static u_int32_t prevobytes = 0; ++ static u_int32_t iwraps = 0; ++ static u_int32_t owraps = 0; ++ + struct ifpppstatsreq req; + + memset (&req, 0, sizeof (req)); +@@ -1426,7 +1444,262 @@ get_ppp_stats(int u, struct pppd_stats * + stats->bytes_out = req.stats.p.ppp_obytes; + stats->pkts_in = req.stats.p.ppp_ipackets; + stats->pkts_out = req.stats.p.ppp_opackets; ++ ++ if (stats->bytes_in < previbytes) ++ ++iwraps; ++ if (stats->bytes_out < prevobytes) ++ ++owraps; ++ ++ previbytes = stats->bytes_in; ++ prevobytes = stats->bytes_out; ++ ++ stats->bytes_in += (uint64_t)iwraps << 32; ++ stats->bytes_out += (uint64_t)owraps << 32; ++ ++ return 1; ++} ++ ++/******************************************************************** ++ * get_ppp_stats_rtnetlink - return statistics for the link, using rtnetlink ++ * This provides native 64-bit counters. ++ */ ++static int ++get_ppp_stats_rtnetlink(int u, struct pppd_stats *stats) ++{ ++ static int rtnl_fd = -1; ++ ++ struct sockaddr_nl nladdr; ++ struct { ++ struct nlmsghdr nlh; ++ struct if_stats_msg ifsm; ++ } nlreq; ++ struct nlresp { ++ struct nlmsghdr nlh; ++ union { ++ struct { ++ struct nlmsgerr nlerr; ++ char __end_err[0]; ++ }; ++ struct { ++ struct rtmsg rth; ++ struct { ++ /* We only case about these first fields from rtnl_link_stats64 */ ++ uint64_t rx_packets; ++ uint64_t tx_packets; ++ uint64_t rx_bytes; ++ uint64_t tx_bytes; ++ } stats; ++ char __end_stats[0]; ++ }; ++ }; ++ } nlresp; ++ ssize_t nlresplen; ++ struct iovec iov; ++ struct msghdr msg; ++ ++ memset(&nladdr, 0, sizeof(nladdr)); ++ nladdr.nl_family = AF_NETLINK; ++ ++ if (rtnl_fd < 0) { ++ rtnl_fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); ++ if (rtnl_fd < 0) { ++ error("get_ppp_stats_rtnetlink: error creating NETLINK socket: %m (line %d)", __LINE__); ++ return 0; ++ } ++ ++ if (bind(rtnl_fd, (struct sockaddr *)&nladdr, sizeof(nladdr)) < 0) { ++ error("get_ppp_stats_rtnetlink: bind(AF_NETLINK): %m (line %d)", __LINE__); ++ goto err; ++ } ++ } ++ ++ memset(&nlreq, 0, sizeof(nlreq)); ++ nlreq.nlh.nlmsg_len = sizeof(nlreq); ++ nlreq.nlh.nlmsg_type = RTM_GETSTATS; ++ nlreq.nlh.nlmsg_flags = NLM_F_REQUEST; ++ ++ nlreq.ifsm.ifindex = if_nametoindex(ifname); ++ nlreq.ifsm.filter_mask = IFLA_STATS_LINK_64; ++ ++ memset(&iov, 0, sizeof(iov)); ++ iov.iov_base = &nlreq; ++ iov.iov_len = sizeof(nlreq); ++ ++ memset(&msg, 0, sizeof(msg)); ++ msg.msg_name = &nladdr; ++ msg.msg_namelen = sizeof(nladdr); ++ msg.msg_iov = &iov; ++ msg.msg_iovlen = 1; ++ ++ if (sendmsg(rtnl_fd, &msg, 0) < 0) { ++ error("get_ppp_stats_rtnetlink: sendmsg(RTM_GETSTATS): %m (line %d)", __LINE__); ++ goto err; ++ } ++ ++ /* We just need to repoint to IOV ... everything else stays the same */ ++ iov.iov_base = &nlresp; ++ iov.iov_len = sizeof(nlresp); ++ ++ nlresplen = recvmsg(rtnl_fd, &msg, 0); ++ ++ if (nlresplen < 0) { ++ error("get_ppp_stats_rtnetlink: recvmsg(RTM_GETSTATS): %m (line %d)", __LINE__); ++ goto err; ++ } ++ ++ if (nlresplen < sizeof(nlresp.nlh)) { ++ error("get_ppp_stats_rtnetlink: Netlink response message was incomplete (line %d)", __LINE__); ++ goto err; ++ } ++ ++ if (nlresp.nlh.nlmsg_type == NLMSG_ERROR) { ++ if (nlresplen < offsetof(struct nlresp, __end_err)) { ++ if (kernel_version >= KVERSION(4,7,0)) ++ error("get_ppp_stats_rtnetlink: Netlink responded with error: %s (line %d)", strerror(-nlresp.nlerr.error), __LINE__); ++ } else { ++ error("get_ppp_stats_rtnetlink: Netlink responded with an error message, but the nlmsgerr structure is incomplete (line %d).", ++ __LINE__); ++ } ++ goto err; ++ } ++ ++ if (nlresp.nlh.nlmsg_type != RTM_NEWSTATS) { ++ error("get_ppp_stats_rtnetlink: Expected RTM_NEWSTATS response, found something else (mlmsg_type %d, line %d)", ++ nlresp.nlh.nlmsg_type, __LINE__); ++ goto err; ++ } ++ ++ if (nlresplen < offsetof(struct nlresp, __end_stats)) { ++ error("get_ppp_stats_rtnetlink: Obtained an insufficiently sized rtnl_link_stats64 struct from the kernel (line %d).", __LINE__); ++ goto err; ++ } ++ ++ stats->bytes_in = nlresp.stats.rx_bytes; ++ stats->bytes_out = nlresp.stats.tx_bytes; ++ stats->pkts_in = nlresp.stats.rx_packets; ++ stats->pkts_out = nlresp.stats.tx_packets; ++ + return 1; ++err: ++ close(rtnl_fd); ++ rtnl_fd = -1; ++ return 0; ++} ++ ++/******************************************************************** ++ * get_ppp_stats_sysfs - return statistics for the link, using the files in sysfs, ++ * this provides native 64-bit counters. ++ */ ++static int ++get_ppp_stats_sysfs(int u, struct pppd_stats *stats) ++{ ++ char fname[PATH_MAX+1]; ++ char buf[21], *err; /* 2^64 < 10^20 */ ++ int blen, fd, rlen; ++ unsigned long long val; ++ ++ struct { ++ const char* fname; ++ void* ptr; ++ unsigned size; ++ } slist[] = { ++#define statfield(fn, field) { .fname = #fn, .ptr = &stats->field, .size = sizeof(stats->field) } ++ statfield(rx_bytes, bytes_in), ++ statfield(tx_bytes, bytes_out), ++ statfield(rx_packets, pkts_in), ++ statfield(tx_packets, pkts_out), ++#undef statfield ++ }; ++ ++ blen = snprintf(fname, sizeof(fname), "/sys/class/net/%s/statistics/", ifname); ++ if (blen >= sizeof(fname)) ++ return 0; /* ifname max 15, so this should be impossible */ ++ ++ for (int i = 0; i < sizeof(slist) / sizeof(*slist); ++i) { ++ if (snprintf(fname + blen, sizeof(fname) - blen, "%s", slist[i].fname) >= sizeof(fname) - blen) { ++ fname[blen] = 0; ++ error("sysfs stats: filename %s/%s overflowed PATH_MAX", fname, slist[i].fname); ++ return 0; ++ } ++ ++ fd = open(fname, O_RDONLY); ++ if (fd < 0) { ++ error("%s: %m", fname); ++ return 0; ++ } ++ ++ rlen = read(fd, buf, sizeof(buf) - 1); ++ close(fd); ++ if (rlen < 0) { ++ error("%s: %m", fname); ++ return 0; ++ } ++ /* trim trailing \n if present */ ++ while (rlen > 0 && buf[rlen-1] == '\n') ++ rlen--; ++ buf[rlen] = 0; ++ ++ errno = 0; ++ val = strtoull(buf, &err, 10); ++ if (*buf < '0' || *buf > '9' || errno != 0 || *err) { ++ error("string to number conversion error converting %s (from %s) for remaining string %s%s%s", ++ buf, fname, err, errno ? ": " : "", errno ? strerror(errno) : ""); ++ return 0; ++ } ++ switch (slist[i].size) { ++#define stattype(type) case sizeof(type): *(type*)slist[i].ptr = (type)val; break ++ stattype(uint64_t); ++ stattype(uint32_t); ++ stattype(uint16_t); ++ stattype(uint8_t); ++#undef stattype ++ default: ++ error("Don't know how to store stats for %s of size %u", slist[i].fname, slist[i].size); ++ return 0; ++ } ++ } ++ ++ return 1; ++} ++ ++/******************************************************************** ++ * Periodic timer function to be used to keep stats up to date in case of ioctl ++ * polling. ++ * ++ * Given the 25s interval this should be fine up to data rates of 1.37Gbps. ++ * If you do change the timer, remember to also bring the get_ppp_stats (which ++ * sets up the initial trigger) as well. ++ */ ++static void ++ppp_stats_poller(void* u) ++{ ++ struct pppd_stats dummy; ++ get_ppp_stats_ioctl((long)u, &dummy); ++ TIMEOUT(ppp_stats_poller, u, 25); ++} ++ ++/******************************************************************** ++ * get_ppp_stats - return statistics for the link. ++ */ ++int get_ppp_stats(int u, struct pppd_stats *stats) ++{ ++ static int (*func)(int, struct pppd_stats*) = NULL; ++ ++ if (!func) { ++ if (get_ppp_stats_rtnetlink(u, stats)) { ++ func = get_ppp_stats_rtnetlink; ++ return 1; ++ } ++ if (get_ppp_stats_sysfs(u, stats)) { ++ func = get_ppp_stats_sysfs; ++ return 1; ++ } ++ warn("statistics falling back to ioctl which only supports 32-bit counters"); ++ func = get_ppp_stats_ioctl; ++ TIMEOUT(ppp_stats_poller, (void*)(long)u, 25); ++ } ++ ++ return func(u, stats); + } + + /******************************************************************** diff --git a/package/network/services/ppp/patches/142-pppd-Add-support-for-registering-ppp-interface-via-L.patch b/package/network/services/ppp/patches/142-pppd-Add-support-for-registering-ppp-interface-via-L.patch new file mode 100644 index 0000000000..9987d3dce9 --- /dev/null +++ b/package/network/services/ppp/patches/142-pppd-Add-support-for-registering-ppp-interface-via-L.patch @@ -0,0 +1,299 @@ +From 4a54e34cf5629f9fed61f0b7d69ee3ba4d874bc6 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= +Date: Sat, 9 Jul 2022 13:40:24 +0200 +Subject: [PATCH] pppd: Add support for registering ppp interface via Linux + rtnetlink API +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +pppd currently creates ppp network interface via PPPIOCNEWUNIT ioctl API. +This API creates a new ppp network interface named "ppp". If user +supply option "ifname" with custom network name then pppd calls SIOCSIFNAME +ioctl to rename "ppp" to custom name immediately after successful +PPPIOCNEWUNIT ioctl call. If custom name is already registered then +SIOCSIFNAME ioctl fails and pppd close current channel (which destroy also +network interface). + +This has side effect that in the first few miliseconds interface has +different name as what user supplied. + +Tools like systemd, udev or NetworkManager are trying to query +interface attributes based on interface name immediately when new +network interface is created. + +But if interface is renamed immediately after creation then these tools +fails. For example when running pppd with option "ifname ppp-wan" following +error is reported by systemd / udev into dmesg log: + + [ 35.718732] PPP generic driver version 2.4.2 + [ 35.793914] NET: Registered protocol family 24 + [ 35.889924] systemd-udevd[1852]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable. + [ 35.901450] ppp-wan: renamed from ppp0 + [ 35.930332] systemd-udevd[1852]: link_config: could not get ethtool features for ppp0 + [ 35.939473] systemd-udevd[1852]: Could not set offload features of ppp0: No such device + +There is an easy way to fix this issue: Use new rtnetlink API. + +Via rtnetlink API it is possible to create ppp network interface with +custom ifname atomically. Just it is not possible to specify custom ppp +unit id. + +So use new rtnetlink API when user requested custom ifname without custom +ppp unit id. This will avoid system issues with interface renaming as ppp +interface is directly registered with specified final name. + +This has also advantage that if requested interface name already exists +then pppd fail during registering of networking interface and not during +renaming network interface which happens after successful registration. + +If user supply custom ppp unit id then it is required to use old ioctl API +as currently it is the only API which allows specifying ppp unit id. + +When user does not specify custom ifname stay also with old ioctl API. +There is currently a bug in kernel which cause that when empty interface is +specified in rtnetlink message for creating ppp interface then kernel +creates ppp interface but with pseudo-random name, not derived from ppp +unit id. And therefore it is not possible to retrieve what is the name of +newly created network interface. So when user does not specify interface +name via "ifname" option (which means that want from kernel to choose some +"free" interface name) it is needed to use old ioctl API which do it +correctly for now. + +Signed-off-by: Pali Rohár +--- + pppd/sys-linux.c | 194 ++++++++++++++++++++++++++++++++++++++++++++++- + 1 file changed, 192 insertions(+), 2 deletions(-) + +--- a/pppd/sys-linux.c ++++ b/pppd/sys-linux.c +@@ -126,6 +126,11 @@ + #include + #include + #include ++ ++#ifdef INET6 ++#include ++#endif ++ + /* Attempt at retaining compile-support with older than 4.7 kernels, or kernels + * where RTM_NEWSTATS isn't defined for whatever reason. + */ +@@ -135,16 +140,20 @@ + #define IFLA_STATS_LINK_64 1 + #endif + +-#ifdef INET6 +-#include + /* glibc versions prior to 2.24 do not define SOL_NETLINK */ + #ifndef SOL_NETLINK + #define SOL_NETLINK 270 + #endif ++ + /* linux kernel versions prior to 4.3 do not define/support NETLINK_CAP_ACK */ + #ifndef NETLINK_CAP_ACK + #define NETLINK_CAP_ACK 10 + #endif ++ ++/* linux kernel versions prior to 4.7 do not define/support IFLA_PPP_DEV_FD */ ++#ifndef IFLA_PPP_MAX ++/* IFLA_PPP_DEV_FD is declared as enum when IFLA_PPP_MAX is defined */ ++#define IFLA_PPP_DEV_FD 1 + #endif + + #include "pppd.h" +@@ -657,6 +666,160 @@ void generic_disestablish_ppp(int dev_fd + } + + /* ++ * make_ppp_unit_rtnetlink - register a new ppp network interface for ppp_dev_fd ++ * with specified req_ifname via rtnetlink. Interface name req_ifname must not ++ * be empty. Custom ppp unit id req_unit is ignored and kernel choose some free. ++ */ ++static int make_ppp_unit_rtnetlink(void) ++{ ++ struct { ++ struct nlmsghdr nlh; ++ struct ifinfomsg ifm; ++ struct { ++ struct rtattr rta; ++ char ifname[IFNAMSIZ]; ++ } ifn; ++ struct { ++ struct rtattr rta; ++ struct { ++ struct rtattr rta; ++ char ifkind[sizeof("ppp")]; ++ } ifik; ++ struct { ++ struct rtattr rta; ++ struct { ++ struct rtattr rta; ++ union { ++ int ppp_dev_fd; ++ } ppp; ++ } ifdata[1]; ++ } ifid; ++ } ifli; ++ } nlreq; ++ struct { ++ struct nlmsghdr nlh; ++ struct nlmsgerr nlerr; ++ } nlresp; ++ struct sockaddr_nl nladdr; ++ struct iovec iov; ++ struct msghdr msg; ++ ssize_t nlresplen; ++ int one; ++ int fd; ++ ++ fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); ++ if (fd < 0) { ++ error("make_ppp_unit_rtnetlink: socket(NETLINK_ROUTE): %m (line %d)", __LINE__); ++ return 0; ++ } ++ ++ /* Tell kernel to not send to us payload of acknowledgment error message. */ ++ one = 1; ++ setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, &one, sizeof(one)); ++ ++ memset(&nladdr, 0, sizeof(nladdr)); ++ nladdr.nl_family = AF_NETLINK; ++ ++ if (bind(fd, (struct sockaddr *)&nladdr, sizeof(nladdr)) < 0) { ++ error("make_ppp_unit_rtnetlink: bind(AF_NETLINK): %m (line %d)", __LINE__); ++ close(fd); ++ return 0; ++ } ++ ++ memset(&nlreq, 0, sizeof(nlreq)); ++ nlreq.nlh.nlmsg_len = sizeof(nlreq); ++ nlreq.nlh.nlmsg_type = RTM_NEWLINK; ++ nlreq.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE; ++ nlreq.ifm.ifi_family = AF_UNSPEC; ++ nlreq.ifm.ifi_type = ARPHRD_NETROM; ++ nlreq.ifn.rta.rta_len = sizeof(nlreq.ifn); ++ nlreq.ifn.rta.rta_type = IFLA_IFNAME; ++ strlcpy(nlreq.ifn.ifname, req_ifname, sizeof(nlreq.ifn.ifname)); ++ nlreq.ifli.rta.rta_len = sizeof(nlreq.ifli); ++ nlreq.ifli.rta.rta_type = IFLA_LINKINFO; ++ nlreq.ifli.ifik.rta.rta_len = sizeof(nlreq.ifli.ifik); ++ nlreq.ifli.ifik.rta.rta_type = IFLA_INFO_KIND; ++ strcpy(nlreq.ifli.ifik.ifkind, "ppp"); ++ nlreq.ifli.ifid.rta.rta_len = sizeof(nlreq.ifli.ifid); ++ nlreq.ifli.ifid.rta.rta_type = IFLA_INFO_DATA; ++ nlreq.ifli.ifid.ifdata[0].rta.rta_len = sizeof(nlreq.ifli.ifid.ifdata[0]); ++ nlreq.ifli.ifid.ifdata[0].rta.rta_type = IFLA_PPP_DEV_FD; ++ nlreq.ifli.ifid.ifdata[0].ppp.ppp_dev_fd = ppp_dev_fd; ++ ++ memset(&nladdr, 0, sizeof(nladdr)); ++ nladdr.nl_family = AF_NETLINK; ++ ++ memset(&iov, 0, sizeof(iov)); ++ iov.iov_base = &nlreq; ++ iov.iov_len = sizeof(nlreq); ++ ++ memset(&msg, 0, sizeof(msg)); ++ msg.msg_name = &nladdr; ++ msg.msg_namelen = sizeof(nladdr); ++ msg.msg_iov = &iov; ++ msg.msg_iovlen = 1; ++ ++ if (sendmsg(fd, &msg, 0) < 0) { ++ error("make_ppp_unit_rtnetlink: sendmsg(RTM_NEWLINK/NLM_F_CREATE): %m (line %d)", __LINE__); ++ close(fd); ++ return 0; ++ } ++ ++ memset(&iov, 0, sizeof(iov)); ++ iov.iov_base = &nlresp; ++ iov.iov_len = sizeof(nlresp); ++ ++ memset(&msg, 0, sizeof(msg)); ++ msg.msg_name = &nladdr; ++ msg.msg_namelen = sizeof(nladdr); ++ msg.msg_iov = &iov; ++ msg.msg_iovlen = 1; ++ ++ nlresplen = recvmsg(fd, &msg, 0); ++ ++ if (nlresplen < 0) { ++ error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): %m (line %d)", __LINE__); ++ close(fd); ++ return 0; ++ } ++ ++ close(fd); ++ ++ if (nladdr.nl_family != AF_NETLINK) { ++ error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Not a netlink packet (line %d)", __LINE__); ++ return 0; ++ } ++ ++ if ((size_t)nlresplen < sizeof(nlresp) || nlresp.nlh.nlmsg_len < sizeof(nlresp)) { ++ error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Acknowledgment netlink packet too short (line %d)", __LINE__); ++ return 0; ++ } ++ ++ /* acknowledgment packet for NLM_F_ACK is NLMSG_ERROR */ ++ if (nlresp.nlh.nlmsg_type != NLMSG_ERROR) { ++ error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Not an acknowledgment netlink packet (line %d)", __LINE__); ++ return 0; ++ } ++ ++ /* error == 0 indicates success, negative value is errno code */ ++ if (nlresp.nlerr.error != 0) { ++ /* ++ * Linux kernel versions prior to 4.7 do not support creating ppp ++ * interfaces via rtnetlink API and therefore error response is ++ * expected. On older kernel versions do not show this error message. ++ * When error is different than EEXIST then pppd tries to fallback to ++ * the old ioctl method. ++ */ ++ errno = (nlresp.nlerr.error < 0) ? -nlresp.nlerr.error : EINVAL; ++ if (kernel_version >= KVERSION(4,7,0)) ++ error("Couldn't create ppp interface %s: %m", req_ifname); ++ return 0; ++ } ++ ++ return 1; ++} ++ ++/* + * make_ppp_unit - make a new ppp unit for ppp_dev_fd. + * Assumes new_style_driver. + */ +@@ -676,6 +839,33 @@ static int make_ppp_unit(void) + || fcntl(ppp_dev_fd, F_SETFL, flags | O_NONBLOCK) == -1) + warn("Couldn't set /dev/ppp to nonblock: %m"); + ++ /* ++ * Via rtnetlink it is possible to create ppp network interface with ++ * custom ifname atomically. But it is not possible to specify custom ++ * ppp unit id. ++ * ++ * Tools like systemd, udev or NetworkManager are trying to query ++ * interface attributes based on interface name immediately when new ++ * network interface is created. And therefore immediate interface ++ * renaming is causing issues. ++ * ++ * So use rtnetlink API only when user requested custom ifname. It will ++ * avoid system issues with interface renaming. ++ */ ++ if (req_unit == -1 && req_ifname[0] != '\0' && kernel_version >= KVERSION(2,1,16)) { ++ if (make_ppp_unit_rtnetlink()) { ++ if (ioctl(ppp_dev_fd, PPPIOCGUNIT, &ifunit)) ++ fatal("Couldn't retrieve PPP unit id: %m"); ++ return 0; ++ } ++ /* ++ * If interface with requested name already exist return error ++ * otherwise fallback to old ioctl method. ++ */ ++ if (errno == EEXIST) ++ return -1; ++ } ++ + ifunit = req_unit; + x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit); + if (x < 0 && req_unit >= 0 && errno == EEXIST) { diff --git a/package/network/services/ppp/patches/143-pppd-Workaround-for-generating-ppp-unit-id-on-Linux-.patch b/package/network/services/ppp/patches/143-pppd-Workaround-for-generating-ppp-unit-id-on-Linux-.patch new file mode 100644 index 0000000000..abe559e074 --- /dev/null +++ b/package/network/services/ppp/patches/143-pppd-Workaround-for-generating-ppp-unit-id-on-Linux-.patch @@ -0,0 +1,59 @@ +From 44609bfc974bdafc0316d069aabf5e2903efa805 Mon Sep 17 00:00:00 2001 +From: pali <7141871+pali@users.noreply.github.com> +Date: Tue, 9 Aug 2022 11:20:15 +0200 +Subject: [PATCH] pppd: Workaround for generating ppp unit id on Linux (#355) +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Linux kernel has nasty bug / feature. If PPPIOCNEWUNIT is called with +negative ppp unit id (which is default option when command line argument +"unit" is not specified; and tells kernel to choose some free ppp unit id) +and the lowest unused/free ppp unit id is present in some existing network +interface name prefixed by "ppp" string then this PPPIOCNEWUNIT ioctl +fails. In this case kernel is basically unable to create a new ppp +interface via PPPIOCNEWUNIT ioctl when user does not specify some unused +and non-conflicted unit id. + +Linux kernel should be fixed to choose usable ppp unit id when was +requested via PPPIOCNEWUNIT parameter -1. + +Until this happens, add a workaround for pppd to help choosing some random +ppp unit id when kernel returns this error. + +Simple test case (run on system when there is no ppp interface): + + sudo ./pppd ifname ppp1 nodefaultroute noauth nolock local nodetach pty "./pppd nodefaultroute noauth nolock local nodetach notty" + +Second pppd process without this patch prints into syslog following error: + + pppd 2.4.10-dev started by pali, uid 0 + Couldn't create new ppp unit: File exists + Exit. + +With this patch it falls back to random ppp unit id and succeeds: + + pppd 2.4.10-dev started by pali, uid 0 + Using interface ppp1361 + Connect: ppp1361 <--> /dev/pts/14 + ... + +Signed-off-by: Pali Rohár +--- + pppd/sys-linux.c | 5 +++++ + 1 file changed, 5 insertions(+) + +--- a/pppd/sys-linux.c ++++ b/pppd/sys-linux.c +@@ -873,6 +873,11 @@ static int make_ppp_unit(void) + ifunit = -1; + x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit); + } ++ if (x < 0 && errno == EEXIST) { ++ srand(time(NULL) * getpid()); ++ ifunit = rand() % 10000; ++ x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit); ++ } + if (x < 0) + error("Couldn't create new ppp unit: %m"); + diff --git a/package/network/services/ppp/patches/144-pppd-Retry-registering-interface-when-on-rtnetlink-E.patch b/package/network/services/ppp/patches/144-pppd-Retry-registering-interface-when-on-rtnetlink-E.patch new file mode 100644 index 0000000000..26c1e34683 --- /dev/null +++ b/package/network/services/ppp/patches/144-pppd-Retry-registering-interface-when-on-rtnetlink-E.patch @@ -0,0 +1,218 @@ +From 089687fbcc6524809ae9f4b2f8145fe3c2a91147 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= +Date: Sat, 7 Aug 2021 19:48:01 +0200 +Subject: [PATCH] pppd: Retry registering interface when on rtnetlink -EBUSY + error +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Due to workaround in kernel module ppp_generic.ko in function +ppp_nl_newlink(), kernel may return -EBUSY error to prevent possible +mutex deadlock. In this case userspace needs to retry its request. + +Proper way would be to fix kernel module to order requests and mutex +locking, so prevent deadlock in kernel and so never return this error to +userspace. Until it happens we need retry code in userspace. + +Signed-off-by: Pali Rohár +[ backport to ppp 2.4.9 ] +Signed-off-by: Christian Marangi +--- + pppd/sys-linux.c | 9 ++++++++- + 1 file changed, 8 insertions(+), 1 deletion(-) + +--- a/pppd/sys-linux.c ++++ b/pppd/sys-linux.c +@@ -707,99 +707,101 @@ static int make_ppp_unit_rtnetlink(void) + int one; + int fd; + +- fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); +- if (fd < 0) { +- error("make_ppp_unit_rtnetlink: socket(NETLINK_ROUTE): %m (line %d)", __LINE__); +- return 0; +- } +- +- /* Tell kernel to not send to us payload of acknowledgment error message. */ +- one = 1; +- setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, &one, sizeof(one)); ++ do { ++ fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); ++ if (fd < 0) { ++ error("make_ppp_unit_rtnetlink: socket(NETLINK_ROUTE): %m (line %d)", __LINE__); ++ return 0; ++ } ++ ++ /* Tell kernel to not send to us payload of acknowledgment error message. */ ++ one = 1; ++ setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, &one, sizeof(one)); ++ ++ memset(&nladdr, 0, sizeof(nladdr)); ++ nladdr.nl_family = AF_NETLINK; ++ ++ if (bind(fd, (struct sockaddr *)&nladdr, sizeof(nladdr)) < 0) { ++ error("make_ppp_unit_rtnetlink: bind(AF_NETLINK): %m (line %d)", __LINE__); ++ close(fd); ++ return 0; ++ } ++ ++ memset(&nlreq, 0, sizeof(nlreq)); ++ nlreq.nlh.nlmsg_len = sizeof(nlreq); ++ nlreq.nlh.nlmsg_type = RTM_NEWLINK; ++ nlreq.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE; ++ nlreq.ifm.ifi_family = AF_UNSPEC; ++ nlreq.ifm.ifi_type = ARPHRD_NETROM; ++ nlreq.ifn.rta.rta_len = sizeof(nlreq.ifn); ++ nlreq.ifn.rta.rta_type = IFLA_IFNAME; ++ strlcpy(nlreq.ifn.ifname, req_ifname, sizeof(nlreq.ifn.ifname)); ++ nlreq.ifli.rta.rta_len = sizeof(nlreq.ifli); ++ nlreq.ifli.rta.rta_type = IFLA_LINKINFO; ++ nlreq.ifli.ifik.rta.rta_len = sizeof(nlreq.ifli.ifik); ++ nlreq.ifli.ifik.rta.rta_type = IFLA_INFO_KIND; ++ strcpy(nlreq.ifli.ifik.ifkind, "ppp"); ++ nlreq.ifli.ifid.rta.rta_len = sizeof(nlreq.ifli.ifid); ++ nlreq.ifli.ifid.rta.rta_type = IFLA_INFO_DATA; ++ nlreq.ifli.ifid.ifdata[0].rta.rta_len = sizeof(nlreq.ifli.ifid.ifdata[0]); ++ nlreq.ifli.ifid.ifdata[0].rta.rta_type = IFLA_PPP_DEV_FD; ++ nlreq.ifli.ifid.ifdata[0].ppp.ppp_dev_fd = ppp_dev_fd; ++ ++ memset(&nladdr, 0, sizeof(nladdr)); ++ nladdr.nl_family = AF_NETLINK; ++ ++ memset(&iov, 0, sizeof(iov)); ++ iov.iov_base = &nlreq; ++ iov.iov_len = sizeof(nlreq); ++ ++ memset(&msg, 0, sizeof(msg)); ++ msg.msg_name = &nladdr; ++ msg.msg_namelen = sizeof(nladdr); ++ msg.msg_iov = &iov; ++ msg.msg_iovlen = 1; ++ ++ if (sendmsg(fd, &msg, 0) < 0) { ++ error("make_ppp_unit_rtnetlink: sendmsg(RTM_NEWLINK/NLM_F_CREATE): %m (line %d)", __LINE__); ++ close(fd); ++ return 0; ++ } ++ ++ memset(&iov, 0, sizeof(iov)); ++ iov.iov_base = &nlresp; ++ iov.iov_len = sizeof(nlresp); ++ ++ memset(&msg, 0, sizeof(msg)); ++ msg.msg_name = &nladdr; ++ msg.msg_namelen = sizeof(nladdr); ++ msg.msg_iov = &iov; ++ msg.msg_iovlen = 1; ++ ++ nlresplen = recvmsg(fd, &msg, 0); ++ ++ if (nlresplen < 0) { ++ error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): %m (line %d)", __LINE__); ++ close(fd); ++ return 0; ++ } + +- memset(&nladdr, 0, sizeof(nladdr)); +- nladdr.nl_family = AF_NETLINK; +- +- if (bind(fd, (struct sockaddr *)&nladdr, sizeof(nladdr)) < 0) { +- error("make_ppp_unit_rtnetlink: bind(AF_NETLINK): %m (line %d)", __LINE__); + close(fd); +- return 0; +- } +- +- memset(&nlreq, 0, sizeof(nlreq)); +- nlreq.nlh.nlmsg_len = sizeof(nlreq); +- nlreq.nlh.nlmsg_type = RTM_NEWLINK; +- nlreq.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE; +- nlreq.ifm.ifi_family = AF_UNSPEC; +- nlreq.ifm.ifi_type = ARPHRD_NETROM; +- nlreq.ifn.rta.rta_len = sizeof(nlreq.ifn); +- nlreq.ifn.rta.rta_type = IFLA_IFNAME; +- strlcpy(nlreq.ifn.ifname, req_ifname, sizeof(nlreq.ifn.ifname)); +- nlreq.ifli.rta.rta_len = sizeof(nlreq.ifli); +- nlreq.ifli.rta.rta_type = IFLA_LINKINFO; +- nlreq.ifli.ifik.rta.rta_len = sizeof(nlreq.ifli.ifik); +- nlreq.ifli.ifik.rta.rta_type = IFLA_INFO_KIND; +- strcpy(nlreq.ifli.ifik.ifkind, "ppp"); +- nlreq.ifli.ifid.rta.rta_len = sizeof(nlreq.ifli.ifid); +- nlreq.ifli.ifid.rta.rta_type = IFLA_INFO_DATA; +- nlreq.ifli.ifid.ifdata[0].rta.rta_len = sizeof(nlreq.ifli.ifid.ifdata[0]); +- nlreq.ifli.ifid.ifdata[0].rta.rta_type = IFLA_PPP_DEV_FD; +- nlreq.ifli.ifid.ifdata[0].ppp.ppp_dev_fd = ppp_dev_fd; +- +- memset(&nladdr, 0, sizeof(nladdr)); +- nladdr.nl_family = AF_NETLINK; +- +- memset(&iov, 0, sizeof(iov)); +- iov.iov_base = &nlreq; +- iov.iov_len = sizeof(nlreq); +- +- memset(&msg, 0, sizeof(msg)); +- msg.msg_name = &nladdr; +- msg.msg_namelen = sizeof(nladdr); +- msg.msg_iov = &iov; +- msg.msg_iovlen = 1; +- +- if (sendmsg(fd, &msg, 0) < 0) { +- error("make_ppp_unit_rtnetlink: sendmsg(RTM_NEWLINK/NLM_F_CREATE): %m (line %d)", __LINE__); +- close(fd); +- return 0; +- } +- +- memset(&iov, 0, sizeof(iov)); +- iov.iov_base = &nlresp; +- iov.iov_len = sizeof(nlresp); +- +- memset(&msg, 0, sizeof(msg)); +- msg.msg_name = &nladdr; +- msg.msg_namelen = sizeof(nladdr); +- msg.msg_iov = &iov; +- msg.msg_iovlen = 1; +- +- nlresplen = recvmsg(fd, &msg, 0); +- +- if (nlresplen < 0) { +- error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): %m (line %d)", __LINE__); +- close(fd); +- return 0; +- } +- +- close(fd); + +- if (nladdr.nl_family != AF_NETLINK) { +- error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Not a netlink packet (line %d)", __LINE__); +- return 0; +- } +- +- if ((size_t)nlresplen < sizeof(nlresp) || nlresp.nlh.nlmsg_len < sizeof(nlresp)) { +- error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Acknowledgment netlink packet too short (line %d)", __LINE__); +- return 0; +- } +- +- /* acknowledgment packet for NLM_F_ACK is NLMSG_ERROR */ +- if (nlresp.nlh.nlmsg_type != NLMSG_ERROR) { +- error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Not an acknowledgment netlink packet (line %d)", __LINE__); +- return 0; +- } ++ if (nladdr.nl_family != AF_NETLINK) { ++ error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Not a netlink packet (line %d)", __LINE__); ++ return 0; ++ } ++ ++ if ((size_t)nlresplen < sizeof(nlresp) || nlresp.nlh.nlmsg_len < sizeof(nlresp)) { ++ error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Acknowledgment netlink packet too short (line %d)", __LINE__); ++ return 0; ++ } ++ ++ /* acknowledgment packet for NLM_F_ACK is NLMSG_ERROR */ ++ if (nlresp.nlh.nlmsg_type != NLMSG_ERROR) { ++ error("make_ppp_unit_rtnetlink: recvmsg(NLM_F_ACK): Not an acknowledgment netlink packet (line %d)", __LINE__); ++ return 0; ++ } ++ } while (nlresp.nlerr.error == -EBUSY); + + /* error == 0 indicates success, negative value is errno code */ + if (nlresp.nlerr.error != 0) { diff --git a/package/network/services/ppp/patches/208-fix_status_code.patch b/package/network/services/ppp/patches/208-fix_status_code.patch index 54e6c45e14..1d991e7949 100644 --- a/package/network/services/ppp/patches/208-fix_status_code.patch +++ b/package/network/services/ppp/patches/208-fix_status_code.patch @@ -12,7 +12,7 @@ Signed-off-by: Jo-Philipp Wich --- a/pppd/main.c +++ b/pppd/main.c -@@ -1034,7 +1034,8 @@ get_input(void) +@@ -1035,7 +1035,8 @@ get_input(void) } notice("Modem hangup"); hungup = 1; diff --git a/package/network/services/ppp/patches/321-multilink_support_custom_iface_names.patch b/package/network/services/ppp/patches/321-multilink_support_custom_iface_names.patch index 0c4d7ea9d6..0ae84ae1ed 100644 --- a/package/network/services/ppp/patches/321-multilink_support_custom_iface_names.patch +++ b/package/network/services/ppp/patches/321-multilink_support_custom_iface_names.patch @@ -119,7 +119,7 @@ Signed-off-by: George Kashperko && memcmp(vd.dptr, key.dptr, vd.dsize) == 0; --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c -@@ -706,6 +706,16 @@ void cfg_bundle(int mrru, int mtru, int +@@ -923,6 +923,16 @@ void cfg_bundle(int mrru, int mtru, int add_fd(ppp_dev_fd); } @@ -136,7 +136,7 @@ Signed-off-by: George Kashperko /* * make_new_bundle - create a new PPP unit (i.e. a bundle) * and connect our channel to it. This should only get called -@@ -724,6 +734,8 @@ void make_new_bundle(int mrru, int mtru, +@@ -941,6 +951,8 @@ void make_new_bundle(int mrru, int mtru, /* set the mrru and flags */ cfg_bundle(mrru, mtru, rssn, tssn); diff --git a/package/network/services/ppp/patches/330-retain_foreign_default_routes.patch b/package/network/services/ppp/patches/330-retain_foreign_default_routes.patch index 6ccc4507b2..3d2a815dbd 100644 --- a/package/network/services/ppp/patches/330-retain_foreign_default_routes.patch +++ b/package/network/services/ppp/patches/330-retain_foreign_default_routes.patch @@ -12,7 +12,7 @@ Signed-off-by: Jo-Philipp Wich --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c -@@ -1770,6 +1770,7 @@ int cifdefaultroute (int unit, u_int32_t +@@ -2248,6 +2248,7 @@ int cifdefaultroute (int unit, u_int32_t SIN_ADDR(rt.rt_genmask) = 0L; } diff --git a/package/network/services/ppp/patches/340-populate_default_gateway.patch b/package/network/services/ppp/patches/340-populate_default_gateway.patch index 0f965c705d..64d03fb5c4 100644 --- a/package/network/services/ppp/patches/340-populate_default_gateway.patch +++ b/package/network/services/ppp/patches/340-populate_default_gateway.patch @@ -13,7 +13,7 @@ Signed-off-by: Jo-Philipp Wich --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c -@@ -1720,6 +1720,9 @@ int sifdefaultroute (int unit, u_int32_t +@@ -2198,6 +2198,9 @@ int sifdefaultroute (int unit, u_int32_t memset (&rt, 0, sizeof (rt)); SET_SA_FAMILY (rt.rt_dst, AF_INET); @@ -23,7 +23,7 @@ Signed-off-by: Jo-Philipp Wich rt.rt_dev = ifname; rt.rt_metric = dfl_route_metric + 1; /* +1 for binary compatibility */ -@@ -1728,7 +1731,7 @@ int sifdefaultroute (int unit, u_int32_t +@@ -2206,7 +2209,7 @@ int sifdefaultroute (int unit, u_int32_t SIN_ADDR(rt.rt_genmask) = 0L; } diff --git a/package/network/services/ppp/patches/400-simplify_kernel_checks.patch b/package/network/services/ppp/patches/400-simplify_kernel_checks.patch index 3c72048362..9d0ea9a0b8 100644 --- a/package/network/services/ppp/patches/400-simplify_kernel_checks.patch +++ b/package/network/services/ppp/patches/400-simplify_kernel_checks.patch @@ -10,7 +10,7 @@ Signed-off-by: Jo-Philipp Wich --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c -@@ -206,7 +206,7 @@ static int driver_is_old = 0; +@@ -235,7 +235,7 @@ static int driver_is_old = 0; static int restore_term = 0; /* 1 => we've munged the terminal */ static struct termios inittermios; /* Initial TTY termios */ @@ -19,7 +19,7 @@ Signed-off-by: Jo-Philipp Wich static char loop_name[20]; static unsigned char inbuf[512]; /* buffer for chars read from loopback */ -@@ -225,8 +225,8 @@ static int looped; /* 1 if using loop +@@ -254,8 +254,8 @@ static int looped; /* 1 if using loop static int link_mtu; /* mtu for the link (not bundle) */ static struct utsname utsname; /* for the kernel version */ @@ -29,7 +29,7 @@ Signed-off-by: Jo-Philipp Wich #define MAX_IFS 100 -@@ -1455,11 +1455,12 @@ int ccp_fatal_error (int unit) +@@ -1933,11 +1933,12 @@ int ccp_fatal_error (int unit) * * path_to_procfs - find the path to the proc file system mount point */ @@ -44,7 +44,7 @@ Signed-off-by: Jo-Philipp Wich struct mntent *mntent; FILE *fp; -@@ -1481,6 +1482,7 @@ static char *path_to_procfs(const char * +@@ -1959,6 +1960,7 @@ static char *path_to_procfs(const char * fclose (fp); } } @@ -52,7 +52,7 @@ Signed-off-by: Jo-Philipp Wich strlcpy(proc_path + proc_path_len, tail, sizeof(proc_path) - proc_path_len); -@@ -2365,15 +2367,19 @@ int ppp_available(void) +@@ -2843,15 +2845,19 @@ int ppp_available(void) int my_version, my_modification, my_patch; int osmaj, osmin, ospatch; @@ -72,7 +72,7 @@ Signed-off-by: Jo-Philipp Wich /* XXX should get from driver */ driver_version = 2; -@@ -2433,6 +2439,7 @@ int ppp_available(void) +@@ -2911,6 +2917,7 @@ int ppp_available(void) if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP)) ok = 0; @@ -80,7 +80,7 @@ Signed-off-by: Jo-Philipp Wich /* * This is the PPP device. Validate the version of the driver at this -@@ -3106,6 +3113,7 @@ get_pty(int *master_fdp, int *slave_fdp, +@@ -3592,6 +3599,7 @@ get_pty(int *master_fdp, int *slave_fdp, } #endif /* TIOCGPTN */ @@ -88,7 +88,7 @@ Signed-off-by: Jo-Philipp Wich if (sfd < 0) { /* the old way - scan through the pty name space */ for (i = 0; i < 64; ++i) { -@@ -3124,6 +3132,7 @@ get_pty(int *master_fdp, int *slave_fdp, +@@ -3610,6 +3618,7 @@ get_pty(int *master_fdp, int *slave_fdp, } } } diff --git a/package/network/services/ppp/patches/401-no_record_file.patch b/package/network/services/ppp/patches/401-no_record_file.patch index 7844260685..0304f36fe2 100644 --- a/package/network/services/ppp/patches/401-no_record_file.patch +++ b/package/network/services/ppp/patches/401-no_record_file.patch @@ -7,7 +7,7 @@ Signed-off-by: Jo-Philipp Wich --- a/pppd/pppd.h +++ b/pppd/pppd.h -@@ -317,7 +317,6 @@ extern int holdoff; /* Dead time before +@@ -318,7 +318,6 @@ extern int holdoff; /* Dead time before extern bool holdoff_specified; /* true if user gave a holdoff value */ extern bool notty; /* Stdin/out is not a tty */ extern char *pty_socket; /* Socket to connect to pty */ diff --git a/package/network/services/ppp/patches/403-no_wtmp.patch b/package/network/services/ppp/patches/403-no_wtmp.patch index 772620ed72..90c2a8208a 100644 --- a/package/network/services/ppp/patches/403-no_wtmp.patch +++ b/package/network/services/ppp/patches/403-no_wtmp.patch @@ -7,7 +7,7 @@ Signed-off-by: Jo-Philipp Wich --- a/pppd/sys-linux.c +++ b/pppd/sys-linux.c -@@ -2503,6 +2503,7 @@ int ppp_available(void) +@@ -2981,6 +2981,7 @@ int ppp_available(void) void logwtmp (const char *line, const char *name, const char *host) { @@ -15,7 +15,7 @@ Signed-off-by: Jo-Philipp Wich struct utmp ut, *utp; pid_t mypid = getpid(); #if __GLIBC__ < 2 -@@ -2568,6 +2569,7 @@ void logwtmp (const char *line, const ch +@@ -3046,6 +3047,7 @@ void logwtmp (const char *line, const ch close (wtmp); } #endif diff --git a/package/network/services/ppp/patches/404-remove_obsolete_protocol_names.patch b/package/network/services/ppp/patches/404-remove_obsolete_protocol_names.patch index b9b6f0e593..8bed425a5b 100644 --- a/package/network/services/ppp/patches/404-remove_obsolete_protocol_names.patch +++ b/package/network/services/ppp/patches/404-remove_obsolete_protocol_names.patch @@ -7,7 +7,7 @@ Signed-off-by: Jo-Philipp Wich --- a/pppd/main.c +++ b/pppd/main.c -@@ -866,14 +866,17 @@ struct protocol_list { +@@ -867,14 +867,17 @@ struct protocol_list { const char *name; } protocol_list[] = { { 0x21, "IP" }, @@ -25,7 +25,7 @@ Signed-off-by: Jo-Philipp Wich { 0x33, "Stream Protocol ST-II" }, { 0x35, "Banyan Vines" }, { 0x39, "AppleTalk EDDP" }, -@@ -887,8 +890,11 @@ struct protocol_list { +@@ -888,8 +891,11 @@ struct protocol_list { { 0x49, "Serial Data Transport Protocol (PPP-SDTP)" }, { 0x4b, "SNA over 802.2" }, { 0x4d, "SNA" }, @@ -37,7 +37,7 @@ Signed-off-by: Jo-Philipp Wich { 0x53, "Encryption" }, { 0x55, "Individual Link Encryption" }, { 0x57, "IPv6" }, -@@ -899,12 +905,15 @@ struct protocol_list { +@@ -900,12 +906,15 @@ struct protocol_list { { 0x65, "RTP IPHC Compressed non-TCP" }, { 0x67, "RTP IPHC Compressed UDP 8" }, { 0x69, "RTP IPHC Compressed RTP 8" }, @@ -53,7 +53,7 @@ Signed-off-by: Jo-Philipp Wich { 0x0203, "IBM Source Routing BPDU" }, { 0x0205, "DEC LANBridge100 Spanning Tree" }, { 0x0207, "Cisco Discovery Protocol" }, -@@ -916,15 +925,19 @@ struct protocol_list { +@@ -917,15 +926,19 @@ struct protocol_list { { 0x0231, "Luxcom" }, { 0x0233, "Sigma Network Systems" }, { 0x0235, "Apple Client Server Protocol" }, @@ -73,7 +73,7 @@ Signed-off-by: Jo-Philipp Wich { 0x4001, "Cray Communications Control Protocol" }, { 0x4003, "CDPD Mobile Network Registration Protocol" }, { 0x4005, "Expand accelerator protocol" }, -@@ -935,8 +948,10 @@ struct protocol_list { +@@ -936,8 +949,10 @@ struct protocol_list { { 0x4023, "RefTek Protocol" }, { 0x4025, "Fibre Channel" }, { 0x4027, "EMIT Protocols" }, @@ -84,7 +84,7 @@ Signed-off-by: Jo-Philipp Wich { 0x8023, "OSI Network Layer Control Protocol" }, { 0x8025, "Xerox NS IDP Control Protocol" }, { 0x8027, "DECnet Phase IV Control Protocol" }, -@@ -945,7 +960,9 @@ struct protocol_list { +@@ -946,7 +961,9 @@ struct protocol_list { { 0x8031, "Bridging NCP" }, { 0x8033, "Stream Protocol Control Protocol" }, { 0x8035, "Banyan Vines Control Protocol" }, @@ -94,7 +94,7 @@ Signed-off-by: Jo-Philipp Wich { 0x803f, "NETBIOS Framing Control Protocol" }, { 0x8041, "Cisco Systems Control Protocol" }, { 0x8043, "Ascom Timeplex" }, -@@ -954,18 +971,24 @@ struct protocol_list { +@@ -955,18 +972,24 @@ struct protocol_list { { 0x8049, "Serial Data Control Protocol (PPP-SDCP)" }, { 0x804b, "SNA over 802.2 Control Protocol" }, { 0x804d, "SNA Control Protocol" }, @@ -119,7 +119,7 @@ Signed-off-by: Jo-Philipp Wich { 0x8207, "Cisco Discovery Protocol Control" }, { 0x8209, "Netcs Twin Routing" }, { 0x820b, "STP - Control Protocol" }, -@@ -974,24 +997,29 @@ struct protocol_list { +@@ -975,24 +998,29 @@ struct protocol_list { { 0x8281, "MPLSCP" }, { 0x8285, "IEEE p1284.4 standard - Protocol Control" }, { 0x8287, "ETSI TETRA TNP1 Control Protocol" }, -- 2.30.2