December 2024 - dev

[PATCH 0/9] vhost-user: Migration support
by Laurent Vivier 20 Jan '25

20 Jan '25

This series allows a QEMU guest to be migrated while it is connected to Passt using vhost-user interface. There are two parts: - first part enables the migration of QEMU without transferring the internal state of Passt. All connections are lost. This is done by implementing VHOST_USER_SET_LOG_FD and VHOST_USER_SET_LOG_BASE commands (and enabling VHOST_USER_PROTOCOL_F_LOG_SHMFD feature) "vhost-user: add VHOST_USER_SET_LOG_FD command" "vhost-user: add VHOST_USER_SET_LOG_BASE … [View More]

3 30

[PATCH] tcp: Add missing EPOLLET flag for established sockets
by Asahi Lina 10 Jan '25

10 Jan '25

When there is unacknowledged data in the inbound socket buffer, passt leaves the socket in the epoll instance to accept new data from the server. Since there is already data in the socket buffer, an epoll without EPOLLET will repeatedly fire while no data is processed, busy-looping the CPU: epoll_pwait(3, [...], 8, 1000, NULL, 8) = 4 recvmsg(25, {msg_namelen=0}, MSG_PEEK) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(169, {msg_namelen=0}, MSG_PEEK) = -1 EAGAIN (Resource temporarily … [View More]

2 4

[PATCH v2 00/12] Cleanups to packet pool handling and sizing
by David Gibson 08 Jan '25

08 Jan '25

This... is not any of the things I said I would be working on. I can only say that a herd of very hairy yaks led me astray. Looking at bug 66 I spotted some problems with our handling of MTUs / maximum frame sizes. Looking at that I found some weirdness and some real, if minor, bugs in the sizing and handling of the packet pools. Changes in v2: * Stefano convinced me that packet_check_range() is still worthwhile. * So don't remove it... but in looking at it I spotted various flaws … [View More]

2 37

[PATCH v5] dhcp, dhcpv6: Add hostname and client fqdn ops
by Enrique Llorente 07 Jan '25

07 Jan '25

Both DHCPv4 and DHCPv6 has the capability to pass the hostname to clients, the DHCPv4 uses option 12 (hostname) while the DHCPv6 uses option 39 (client fqdn), for some virt deployments like kubevirt is expected to have the VirtualMachine name as the guest hostname. This change add the following arguments: - -H --hostname NAME to configure the hostname DHCPv4 option(12) - --fqdn NAME to configure client fqdn option for both DHCPv4(81) and DHCPv6(39) Signed-off-by: Enrique Llorente <… [View More]ellorent(a)redhat.com> --- conf.c | 20 +++++++++++-- dhcp.c | 50 ++++++++++++++++++++++++++++---- dhcpv6.c | 75 +++++++++++++++++++++++++++++++++++++++--------- passt.1 | 11 +++++++ passt.h | 5 ++++ pasta.c | 18 ++++++++---- test/lib/setup | 10 +++---- test/passt.mbuto | 6 ++-- test/passt/dhcp | 15 +++++++++- util.c | 23 +++++++++++++++ util.h | 6 ++++ 11 files changed, 204 insertions(+), 35 deletions(-) diff --git a/conf.c b/conf.c index df2b016..5f21193 100644 --- a/conf.c +++ b/conf.c @@ -854,7 +854,9 @@ static void usage(const char *name, FILE *f, int status) FPRINTF(f, " default: use addresses from /etc/resolv.conf\n"); FPRINTF(f, " -S, --search LIST Space-separated list, search domains\n" - " a single, empty option disables the DNS search list\n"); + " a single, empty option disables the DNS search list\n" + " -H, --hostname NAME Hostname to configure client with\n" + " --fqdn NAME FQDN to configure client with\n"); if (strstr(name, "pasta")) FPRINTF(f, " default: don't use any search list\n"); else @@ -1313,6 +1315,7 @@ void conf(struct ctx *c, int argc, char **argv) {"outbound", required_argument, NULL, 'o' }, {"dns", required_argument, NULL, 'D' }, {"search", required_argument, NULL, 'S' }, + {"hostname", required_argument, NULL, 'H' }, {"no-tcp", no_argument, &c->no_tcp, 1 }, {"no-udp", no_argument, &c->no_udp, 1 }, {"no-icmp", no_argument, &c->no_icmp, 1 }, @@ -1357,6 +1360,7 @@ void conf(struct ctx *c, int argc, char **argv) /* vhost-user backend program convention */ {"print-capabilities", no_argument, NULL, 26 }, {"socket-path", required_argument, NULL, 's' }, + {"fqdn", required_argument, NULL, 27 }, { 0 }, }; const char *logname = (c->mode == MODE_PASTA) ? "pasta" : "passt"; @@ -1379,9 +1383,9 @@ void conf(struct ctx *c, int argc, char **argv) if (c->mode == MODE_PASTA) { c->no_dhcp_dns = c->no_dhcp_dns_search = 1; fwd_default = FWD_AUTO; - optstring = "+dqfel:hF:I:p:P:m:a:n:M:g:i:o:D:S:46t:u:T:U:"; + optstring = "+dqfel:hF:I:p:P:m:a:n:M:g:i:o:D:S:H:46t:u:T:U:"; } else { - optstring = "+dqfel:hs:F:p:P:m:a:n:M:g:i:o:D:S:461t:u:"; + optstring = "+dqfel:hs:F:p:P:m:a:n:M:g:i:o:D:S:H:461t:u:"; } c->tcp.fwd_in.mode = c->tcp.fwd_out.mode = FWD_UNSET; @@ -1558,6 +1562,11 @@ void conf(struct ctx *c, int argc, char **argv) case 26: vu_print_capabilities(); break; + case 27: + if (snprintf_check(c->fqdn, PASST_MAXDNAME, + "%s", optarg)) + die("Invalid FQDN: %s", optarg); + break; case 'd': c->debug = 1; c->quiet = 0; @@ -1727,6 +1736,11 @@ void conf(struct ctx *c, int argc, char **argv) die("Cannot use DNS search domain %s", optarg); break; + case 'H': + if (snprintf_check(c->hostname, PASST_MAXDNAME, + "%s", optarg)) + die("Invalid hostname: %s", optarg); + break; case '4': v4_only = true; v6_only = false; diff --git a/dhcp.c b/dhcp.c index d8515aa..b224bf8 100644 --- a/dhcp.c +++ b/dhcp.c @@ -63,6 +63,12 @@ static struct opt opts[255]; #define OPT_MIN 60 /* RFC 951 */ +/* 576 (RFC 2131), minus offset + * of options (268), minus end + * option and its length (2) + */ +#define OPT_MAX 306 + /** * dhcp_init() - Initialise DHCP options */ @@ -122,7 +128,7 @@ struct msg { uint8_t sname[64]; uint8_t file[128]; uint32_t magic; - uint8_t o[308]; + uint8_t o[OPT_MAX + 2]; /* End option and length */ } __attribute__((__packed__)); /** @@ -130,15 +136,31 @@ struct msg { * @m: Message to fill * @o: Option number * @offset: Current offset within options field, updated on insertion + * + * Return: offset for the next option field */ -static void fill_one(struct msg *m, int o, int *offset) +static int fill_one(struct msg *m, int o, int *offset) { + size_t idx, slen = 0; + + /* If it cannot write even enum + len + one byte, then just skip */ + if (*offset + 2 > OPT_MAX) + return OPT_MAX; + m->o[*offset] = o; m->o[*offset + 1] = opts[o].slen; - memcpy(&m->o[*offset + 2], opts[o].s, opts[o].slen); + idx = *offset + 2; + slen = opts[o].slen; + + /* Truncate if it goes beyond OPT_MAX */ + if (idx + slen > OPT_MAX) + slen = OPT_MAX - idx; + + memcpy(&m->o[*offset + 2], opts[o].s, slen); opts[o].sent = 1; *offset += 2 + opts[o].slen; + return *offset; } /** @@ -172,7 +194,10 @@ static int fill(struct msg *m) for (o = 0; o < 255; o++) { if (opts[o].slen != -1 && !opts[o].sent) - fill_one(m, o, &offset); + if (fill_one(m, o, &offset) == OPT_MAX) { + debug("DHCP: truncating after option %i", o); + break; + } } m->o[offset++] = 255; @@ -285,7 +310,7 @@ static void opt_set_dns_search(const struct ctx *c, size_t max_len) */ int dhcp(const struct ctx *c, const struct pool *p) { - size_t mlen, dlen, offset = 0, opt_len, opt_off = 0; + size_t mlen, dlen, offset = 0, opt_len, opt_off = 0, hostname_len = 0, fqdn_len = 0; char macstr[ETH_ADDRSTRLEN]; struct in_addr mask, dst; const struct ethhdr *eh; @@ -398,6 +423,21 @@ int dhcp(const struct ctx *c, const struct pool *p) if (!opts[6].slen) opts[6].slen = -1; + hostname_len = strlen(c->hostname); + if (hostname_len > 0) { + opts[12].slen = hostname_len; + memcpy(opts[12].s, &c->hostname, hostname_len); + } + + fqdn_len = strlen(c->fqdn); + if (fqdn_len > 0) { + size_t encoded_len = 0; + opts[81].s[0] = 0x4; /* flags (E) */ + encoded_len = encode_domain_name(c->fqdn, fqdn_len, + (char *) opts[81].s + 3); + opts[81].slen = encoded_len + 3; + } + if (!c->no_dhcp_dns_search) opt_set_dns_search(c, sizeof(m->o)); diff --git a/dhcpv6.c b/dhcpv6.c index 0523bba..ce3a1bd 100644 --- a/dhcpv6.c +++ b/dhcpv6.c @@ -48,6 +48,7 @@ struct opt_hdr { # define STATUS_NOTONLINK htons_constant(4) # define OPT_DNS_SERVERS htons_constant(23) # define OPT_DNS_SEARCH htons_constant(24) +# define OPT_CLIENT_FQDN htons_constant(39) #define STR_NOTONLINK "Prefix not appropriate for link." uint16_t l; @@ -58,6 +59,9 @@ struct opt_hdr { sizeof(struct opt_hdr)) #define OPT_VSIZE(x) (sizeof(struct opt_##x) - \ sizeof(struct opt_hdr)) +#define OPT_MAX_SIZE IPV6_MIN_MTU - (sizeof(struct ipv6hdr) + \ + sizeof(struct udphdr) + \ + sizeof(struct msg_hdr)) /** * struct opt_client_id - DHCPv6 Client Identifier option @@ -163,6 +167,18 @@ struct opt_dns_search { char list[MAXDNSRCH * NS_MAXDNAME]; } __attribute__((packed)); +/** + * struct opt_client_fqdn - Client FQDN option (RFC 4704) + * @hdr: Option header + * @flags: Flags described by RFC 4704 (always zero for us) + * @domain_name: Client FQDN + */ +struct opt_client_fqdn{ + struct opt_hdr hdr; + uint8_t flags; + char domain_name[PASST_MAXDNAME]; +} __attribute__((packed)); + /** * struct msg_hdr - DHCPv6 client/server message header * @type: DHCP message type @@ -193,6 +209,7 @@ struct msg_hdr { * @client_id: Client Identifier, variable length * @dns_servers: DNS Recursive Name Server, here just for storage size * @dns_search: Domain Search List, here just for storage size + * @client_fqdn: Client FQDN, variable length */ static struct resp_t { struct msg_hdr hdr; @@ -203,6 +220,7 @@ static struct resp_t { struct opt_client_id client_id; struct opt_dns_servers dns_servers; struct opt_dns_search dns_search; + struct opt_client_fqdn client_fqdn; } __attribute__((__packed__)) resp = { { 0 }, SERVER_ID, @@ -228,6 +246,10 @@ static struct resp_t { { { OPT_DNS_SEARCH, 0, }, { 0 }, }, + + { { OPT_CLIENT_FQDN, 0, }, + 0, { 0 }, + }, }; static const struct opt_status_code sc_not_on_link = { @@ -346,7 +368,6 @@ static size_t dhcpv6_dns_fill(const struct ctx *c, char *buf, int offset) { struct opt_dns_servers *srv = NULL; struct opt_dns_search *srch = NULL; - char *p = NULL; int i; if (c->no_dhcp_dns) @@ -373,6 +394,7 @@ search: return offset; for (i = 0; *c->dns_search[i].n; i++) { + size_t encoded_name_len = 0; size_t name_len = strlen(c->dns_search[i].n); /* We already append separators, don't duplicate if present */ @@ -388,29 +410,53 @@ search: offset += sizeof(struct opt_hdr); srch->hdr.t = OPT_DNS_SEARCH; srch->hdr.l = 0; - p = srch->list; } - - *p = '.'; - p = stpncpy(p + 1, c->dns_search[i].n, name_len); - p++; - srch->hdr.l += name_len + 2; - offset += name_len + 2; + + encoded_name_len = encode_domain_name(c->dns_search[i].n, + name_len, srch->list); + srch->hdr.l += encoded_name_len; + offset += encoded_name_len; } if (srch) { - for (i = 0; i < srch->hdr.l; i++) { - if (srch->list[i] == '.') { - srch->list[i] = strcspn(srch->list + i + 1, - "."); - } - } srch->hdr.l = htons(srch->hdr.l); } return offset; } +/** + * dhcpv6_client_fqdn_fill() - Fill in client FQDN option + * @c: Execution context + * @buf: Response message buffer where options will be appended + * @offset: Offset in message buffer for new options + * + * Return: updated length of response message buffer. + */ +static size_t dhcpv6_client_fqdn_fill(const struct ctx *c, char *buf, int offset) +{ + size_t fqdn_len, opt_hdr_len, opt_len, encoded_fqdn_len; + struct opt_client_fqdn *o; + + opt_hdr_len = sizeof(struct opt_hdr); + + fqdn_len = MIN(strlen(c->fqdn), OPT_MAX_SIZE - (offset + opt_hdr_len + 1)); + + if (fqdn_len == 0) + return offset; + + o = (struct opt_client_fqdn *)(buf + offset); + encoded_fqdn_len = encode_domain_name(c->fqdn, fqdn_len, + o->domain_name); + opt_len = encoded_fqdn_len + 1; + + o->hdr.t = OPT_CLIENT_FQDN; + o->hdr.l = htons(opt_len); + o->flags = 0x00; + + return offset + opt_hdr_len + opt_len; +} + /** * dhcpv6() - Check if this is a DHCPv6 message, reply as needed * @c: Execution context @@ -544,6 +590,7 @@ int dhcpv6(struct ctx *c, const struct pool *p, n = offsetof(struct resp_t, client_id) + sizeof(struct opt_hdr) + ntohs(client_id->l); n = dhcpv6_dns_fill(c, (char *)&resp, n); + n = dhcpv6_client_fqdn_fill(c, (char *)&resp, n); resp.hdr.xid = mh->xid; diff --git a/passt.1 b/passt.1 index d9cd33e..8f6b194 100644 --- a/passt.1 +++ b/passt.1 @@ -401,6 +401,17 @@ Enable IPv6-only operation. IPv4 traffic will be ignored. By default, IPv4 operation is enabled as long as at least an IPv4 route and an interface address are configured on a given host interface. +.TP +.BR \-H ", " \-\-hostname " " \fIname +Hostname to configure client with. +Send \fIname as DHCP option 12 (hostname). + +.TP +.BR \-\-fqdn " " \fIname +FQDN to configure client with. +Send \fIname as dhcp client fqdn option, for DHCP option 81 and for +DHCPv6 option 39. + .SS \fBpasst\fR-only options .TP diff --git a/passt.h b/passt.h index 0dd4efa..9909a10 100644 --- a/passt.h +++ b/passt.h @@ -209,6 +209,8 @@ struct ip6_ctx { * @ifi4: Template interface for IPv4, -1: none, 0: IPv4 disabled * @ip: IPv4 configuration * @dns_search: DNS search list + * @hostname: Guest hostname + * @fqdn: Guest FQDN * @ifi6: Template interface for IPv6, -1: none, 0: IPv6 disabled * @ip6: IPv6 configuration * @pasta_ifn: Name of namespace interface for pasta @@ -268,6 +270,9 @@ struct ctx { struct ip4_ctx ip4; struct fqdn dns_search[MAXDNSRCH]; + + char hostname[PASST_MAXDNAME]; + char fqdn[PASST_MAXDNAME]; int ifi6; struct ip6_ctx ip6; diff --git a/pasta.c b/pasta.c index ff41c95..00678f3 100644 --- a/pasta.c +++ b/pasta.c @@ -173,6 +173,7 @@ void pasta_open_ns(struct ctx *c, const char *netns) struct pasta_spawn_cmd_arg { const char *exe; char *const *argv; + struct ctx *c; }; /** @@ -186,6 +187,7 @@ static int pasta_spawn_cmd(void *arg) { char hostname[HOST_NAME_MAX + 1] = HOSTNAME_PREFIX; const struct pasta_spawn_cmd_arg *a; + size_t conf_hostname_len; sigset_t set; /* We run in a detached PID and mount namespace: mount /proc over */ @@ -194,10 +196,16 @@ static int pasta_spawn_cmd(void *arg) if (write_file("/proc/sys/net/ipv4/ping_group_range", "0 0")) warn("Cannot set ping_group_range, ICMP requests might fail"); - - if (!gethostname(hostname + sizeof(HOSTNAME_PREFIX) - 1, - HOST_NAME_MAX + 1 - sizeof(HOSTNAME_PREFIX)) || - errno == ENAMETOOLONG) { + + a = (const struct pasta_spawn_cmd_arg *)arg; + + conf_hostname_len = strlen(a->c->hostname); + if (conf_hostname_len > 0) { + if (sethostname(a->c->hostname, conf_hostname_len)) + warn("Unable to set configured hostname"); + }else if (!gethostname(hostname + sizeof(HOSTNAME_PREFIX) - 1, + HOST_NAME_MAX + 1 - sizeof(HOSTNAME_PREFIX)) || + errno == ENAMETOOLONG) { hostname[HOST_NAME_MAX] = '\0'; if (sethostname(hostname, strlen(hostname))) warn("Unable to set pasta-prefixed hostname"); @@ -208,7 +216,6 @@ static int pasta_spawn_cmd(void *arg) sigaddset(&set, SIGUSR1); sigwaitinfo(&set, NULL); - a = (const struct pasta_spawn_cmd_arg *)arg; execvp(a->exe, a->argv); die_perror("Failed to start command or shell"); @@ -230,6 +237,7 @@ void pasta_start_ns(struct ctx *c, uid_t uid, gid_t gid, struct pasta_spawn_cmd_arg arg = { .exe = argv[0], .argv = argv, + .c = c, }; char uidmap[BUFSIZ], gidmap[BUFSIZ]; char *sh_argv[] = { NULL, NULL }; diff --git a/test/lib/setup b/test/lib/setup index 580825f..ee67152 100755 --- a/test/lib/setup +++ b/test/lib/setup @@ -49,7 +49,7 @@ setup_passt() { context_run passt "make clean" context_run passt "make valgrind" - context_run_bg passt "valgrind --max-stackframe=$((4 * 1024 * 1024)) --trace-children=yes --vgdb=no --error-exitcode=1 --suppressions=test/valgrind.supp ./passt ${__opts} -s ${STATESETUP}/passt.socket -f -t 10001 -u 10001 -P ${STATESETUP}/passt.pid" + context_run_bg passt "valgrind --max-stackframe=$((4 * 1024 * 1024)) --trace-children=yes --vgdb=no --error-exitcode=1 --suppressions=test/valgrind.supp ./passt ${__opts} -s ${STATESETUP}/passt.socket -f -t 10001 -u 10001 -H hostname1 --fqdn fqdn1.passt.test -P ${STATESETUP}/passt.pid" # pidfile isn't created until passt is listening wait_for [ -f "${STATESETUP}/passt.pid" ] @@ -160,11 +160,11 @@ setup_passt_in_ns() { if [ ${VALGRIND} -eq 1 ]; then context_run passt "make clean" context_run passt "make valgrind" - context_run_bg passt "valgrind --max-stackframe=$((4 * 1024 * 1024)) --trace-children=yes --vgdb=no --error-exitcode=1 --suppressions=test/valgrind.supp ./passt -f ${__opts} -s ${STATESETUP}/passt.socket -t 10001,10011,10021,10031 -u 10001,10011,10021,10031 -P ${STATESETUP}/passt.pid --map-host-loopback ${__map_ns4} --map-host-loopback ${__map_ns6}" + context_run_bg passt "valgrind --max-stackframe=$((4 * 1024 * 1024)) --trace-children=yes --vgdb=no --error-exitcode=1 --suppressions=test/valgrind.supp ./passt -f ${__opts} -s ${STATESETUP}/passt.socket -H hostname1 --fqdn fqdn1.passt.test -t 10001,10011,10021,10031 -u 10001,10011,10021,10031 -P ${STATESETUP}/passt.pid --map-host-loopback ${__map_ns4} --map-host-loopback ${__map_ns6}" else context_run passt "make clean" context_run passt "make" - context_run_bg passt "./passt -f ${__opts} -s ${STATESETUP}/passt.socket -t 10001,10011,10021,10031 -u 10001,10011,10021,10031 -P ${STATESETUP}/passt.pid --map-host-loopback ${__map_ns4} --map-host-loopback ${__map_ns6}" + context_run_bg passt "./passt -f ${__opts} -s ${STATESETUP}/passt.socket -H hostname1 --fqdn fqdn1.passt.test -t 10001,10011,10021,10031 -u 10001,10011,10021,10031 -P ${STATESETUP}/passt.pid --map-host-loopback ${__map_ns4} --map-host-loopback ${__map_ns6}" fi wait_for [ -f "${STATESETUP}/passt.pid" ] @@ -243,7 +243,7 @@ setup_two_guests() { [ ${TRACE} -eq 1 ] && __opts="${__opts} --trace" [ ${VHOST_USER} -eq 1 ] && __opts="${__opts} --vhost-user" - context_run_bg passt_1 "./passt -s ${STATESETUP}/passt_1.socket -P ${STATESETUP}/passt_1.pid -f ${__opts} -t 10001 -u 10001" + context_run_bg passt_1 "./passt -s ${STATESETUP}/passt_1.socket -P ${STATESETUP}/passt_1.pid -f ${__opts} --fqdn fqdn1.passt.test -H hostname1 -t 10001 -u 10001" wait_for [ -f "${STATESETUP}/passt_1.pid" ] __opts= @@ -252,7 +252,7 @@ setup_two_guests() { [ ${TRACE} -eq 1 ] && __opts="${__opts} --trace" [ ${VHOST_USER} -eq 1 ] && __opts="${__opts} --vhost-user" - context_run_bg passt_2 "./passt -s ${STATESETUP}/passt_2.socket -P ${STATESETUP}/passt_2.pid -f ${__opts} -t 10004 -u 10004" + context_run_bg passt_2 "./passt -s ${STATESETUP}/passt_2.socket -P ${STATESETUP}/passt_2.pid -f ${__opts} --hostname hostname2 --fqdn fqdn2 -t 10004 -u 10004" wait_for [ -f "${STATESETUP}/passt_2.pid" ] __vmem="$((${MEM_KIB} / 1024 / 4))" diff --git a/test/passt.mbuto b/test/passt.mbuto index 138d365..1e07693 100755 --- a/test/passt.mbuto +++ b/test/passt.mbuto @@ -13,7 +13,7 @@ PROGS="${PROGS:-ash,dash,bash ip mount ls insmod mkdir ln cat chmod lsmod modprobe find grep mknod mv rm umount jq iperf3 dhclient hostname sed tr chown sipcalc cut socat dd strace ping tail killall sleep sysctl - nproc tcp_rr tcp_crr udp_rr which tee seq bc sshd ssh-keygen cmp}" + nproc tcp_rr tcp_crr udp_rr which tee seq bc sshd ssh-keygen cmp env}" # OpenSSH 9.8 introduced split binaries, with sshd being the daemon, and # sshd-session the per-session program. We need the latter as well, and the path @@ -41,6 +41,7 @@ FIXUP="${FIXUP}"' #!/bin/sh LOG=/var/log/dhclient-script.log echo \${reason} \${interface} >> \$LOG +env >> \$LOG set >> \$LOG [ -n "\${new_interface_mtu}" ] && ip link set dev \${interface} mtu \${new_interface_mtu} @@ -54,7 +55,8 @@ set >> \$LOG [ -n "\${new_ip6_address}" ] && ip addr add \${new_ip6_address}/\${new_ip6_prefixlen} dev \${interface} [ -n "\${new_dhcp6_name_servers}" ] && for d in \${new_dhcp6_name_servers}; do echo "nameserver \${d}%\${interface}" >> /etc/resolv.conf; done [ -n "\${new_dhcp6_domain_search}" ] && (printf "search"; for d in \${new_dhcp6_domain_search}; do printf " %s" "\${d}"; done; printf "\n") >> /etc/resolv.conf -[ -n "\${new_host_name}" ] && hostname "\${new_host_name}" +[ -n "\${new_host_name}" ] && echo "\${new_host_name}" > /tmp/new_host_name +[ -n "\${new_fqdn_fqdn}" ] && echo "\${new_fqdn_fqdn}" > /tmp/new_fqdn_fqdn exit 0 EOF chmod 755 /sbin/dhclient-script diff --git a/test/passt/dhcp b/test/passt/dhcp index 9925ab9..145f1ba 100644 --- a/test/passt/dhcp +++ b/test/passt/dhcp @@ -11,7 +11,7 @@ # Copyright (c) 2021 Red Hat GmbH # Author: Stefano Brivio <sbrivio(a)redhat.com> -gtools ip jq dhclient sed tr +gtools ip jq dhclient sed tr hostname htools ip jq sed tr head test Interface name @@ -47,7 +47,16 @@ gout SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^searc hout HOST_SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search $.*$/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/' check [ "__SEARCH__" = "__HOST_SEARCH__" ] +test DHCP: Hostname +gout NEW_HOST_NAME cat /tmp/new_host_name +check [ "__NEW_HOST_NAME__" = "hostname1" ] + +test DHCP: Client FQDN +gout NEW_FQDN_FQDN cat /tmp/new_fqdn_fqdn +check [ "__NEW_FQDN_FQDN__" = "fqdn1.passt.test" ] + test DHCPv6: address +guest rm /tmp/new_fqdn_fqdn guest /sbin/dhclient -6 __IFNAME__ # Wait for DAD to complete guest while ip -j -6 addr show tentative | jq -e '.[].addr_info'; do sleep 0.1; done @@ -70,3 +79,7 @@ test DHCPv6: search list gout SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search $.*$/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/' hout HOST_SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search $.*$/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/' check [ "__SEARCH6__" = "__HOST_SEARCH6__" ] + +test DHCPv6: Hostname +gout NEW_FQDN_FQDN cat /tmp/new_fqdn_fqdn +check [ "__NEW_FQDN_FQDN__" = "fqdn1.passt.test" ] diff --git a/util.c b/util.c index 11973c4..7aeb5b4 100644 --- a/util.c +++ b/util.c @@ -837,3 +837,26 @@ void raw_random(void *buf, size_t buflen) if (random_read < buflen) die("Unexpected EOF on random data source"); } +/** + * encode_domain_name() - Encode domain name according to RFC 1035, section 3.1 + * @domain_name: Input domain name to encode + * @len: Domain name length + * @buf: Buffer to fill in with encoded domain name + * + * Return: encoded domain name length + */ +size_t encode_domain_name(const char *domain_name, size_t len, char *buf) +{ + char *p; + size_t i; + + buf[0] = strcspn(domain_name, "."); + p = buf + 1; + for (i = 0; i < len; i++) { + if (domain_name[i] == '.') + p[i] = strcspn(domain_name + i + 1, "."); + else + p[i] = domain_name[i]; + } + return len + 2; +} diff --git a/util.h b/util.h index 3fa1d12..c55ef29 100644 --- a/util.h +++ b/util.h @@ -40,6 +40,9 @@ #ifndef IP_MAX_MTU #define IP_MAX_MTU USHRT_MAX #endif +#ifndef IPV6_MIN_MTU +#define IPV6_MIN_MTU 1280 +#endif #ifndef MIN #define MIN(x, y) (((x) < (y)) ? (x) : (y)) @@ -346,4 +349,7 @@ static inline int wrap_accept4(int sockfd, struct sockaddr *addr, #define accept4(s, addr, addrlen, flags) \ wrap_accept4((s), (addr), (addrlen), (flags)) +#define PASST_MAXDNAME 253 /* RFC 1035 */ +size_t encode_domain_name(const char* domain_name, size_t len, char* buf); + #endif /* UTIL_H */ -- 2.47.0 [View Less]

3 4

[PATCH 0/3] Cleanups to packet pool handling and sizing
by David Gibson 21 Dec '24

21 Dec '24

This... is not any of the things I said I would be working on. I can only say that a herd of very hairy yaks led me astray. Looking at bug 66 I spotted some problems with our handling of MTUs / maximum frame sizes. Looking at that I found some weirdness and some real, if minor, bugs in the sizing and handling of the packet pools. David Gibson (3): packet: Use flexible array member in struct pool packet: Don't have struct pool specify its buffer tap: Don't size pool_tap[46] for the … [View More]

2 11

[PATCH] udp_flow: Don't block multicast and broadcast messages
by Stefano Brivio 20 Dec '24

20 Dec '24

It was reported that SSDP notifications sent from a container (with e.g. minidlna) stopped appearing on the network starting from commit 1db4f773e87f ("udp: Improve detail of UDP endpoint sanity checking"). As a minimal reproducer using minidlnad(8): $ mkdir /tmp/minidlna $ cat conf media_dir=/tmp/minidlna db_dir=/tmp/minidlna $ ./pasta -d --config-net -- sh -c '/usr/sbin/minidlnad -p 31337 -S -f conf -P /dev/null & (sleep 1; killall minidlnad)' [...] 1.0327: Flow 0 (NEW): … [View More]FREE -> NEW 1.0327: Flow 0 (INI): NEW -> INI 1.0327: Flow 0 (INI): TAP [88.198.0.164]:54185 -> [239.255.255.250]:1900 => ? 1.0327: Flow 0 (INI): Invalid endpoint on UDP packet 1.0327: Flow 0 (FREE): INI -> FREE 1.0328: Flow 0 (FREE): TAP [88.198.0.164]:54185 -> [239.255.255.250]:1900 => ? 1.0328: Dropping datagram with no flow TAP 88.198.0.164:54185 -> 239.255.255.250:1900 This is an actual regression as there's no particular reason to block outbound multicast UDP packets. And even if we don't handle multicast groups in any particular way (https://bugs.passt.top/show_bug.cgi?id=2, "Add IGMP/MLD proxy"), there's no reason to block inbound multicast or broadcast packets either, should they ever be somehow delivered to passt or pasta. Let multicast and broadcast packets through, refusing only to establish flows with unspecified endpoint, as those would actually cause havoc in the flow table. IP-wise, SSDP notifications look like this (after this patch), inside and outside: $ pasta -p /tmp/minidlna.pcap --config-net -- sh -c '/usr/sbin/minidlnad -p 31337 -S -f minidlna.conf -P /dev/null & (sleep 1; killall minidlnad)' [...] $ tshark -a packets:1 -r /tmp/minidlna.pcap ssdp 2 0.074808 88.198.0.164 ? 239.255.255.250 SSDP 200 NOTIFY * HTTP/1.1 # tshark -i ens3 -a packets:1 multicast 2>/dev/null 1 0.000000000 88.198.0.164 ? 239.255.255.250 SSDP 200 NOTIFY * HTTP/1.1 Link: https://github.com/containers/podman/issues/24871 Fixes: 1db4f773e87f ("udp: Improve detail of UDP endpoint sanity checking") Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com> --- udp_flow.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/udp_flow.c b/udp_flow.c index 343caae..9fd7d06 100644 --- a/udp_flow.c +++ b/udp_flow.c @@ -209,7 +209,7 @@ flow_sidx_t udp_flow_from_sock(const struct ctx *c, union epoll_ref ref, if (!inany_is_unicast(&ini->eaddr) || ini->eport == 0 || ini->oport == 0) { - /* In principle ini->oddr also must be unicast, but when we've + /* In principle ini->oddr also must be specified, but when we've * been initiated from a socket bound to 0.0.0.0 or ::, we don't * know our address, so we have to leave it unpopulated. */ @@ -267,8 +267,8 @@ flow_sidx_t udp_flow_from_tap(const struct ctx *c, ini = flow_initiate_af(flow, PIF_TAP, af, saddr, srcport, daddr, dstport); - if (!inany_is_unicast(&ini->eaddr) || ini->eport == 0 || - !inany_is_unicast(&ini->oaddr) || ini->oport == 0) { + if (inany_is_unspecified(&ini->eaddr) || ini->eport == 0 || + inany_is_unspecified(&ini->oaddr) || ini->oport == 0) { flow_dbg(flow, "Invalid endpoint on UDP packet"); flow_alloc_cancel(flow); return FLOW_SIDX_NONE; -- 2.43.0 [View Less]

1 0

[PATCH] Makefile: Report error and stop if we can't set TARGET
by Stefano Brivio 20 Dec '24

20 Dec '24

I don't think it's necessarily productive to check all the possible error conditions in the Makefile, but this one is annoying: issue 'make' without a C compiler, then install one, and build again. Then run passt and it will mysteriously terminate on epoll_wait(), because seccomp.h is good enough to build against, but the resulting seccomp filter doesn't allow any system call. Not really fun to debug. Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com> --- Makefile | 1 + 1 file … [View More]

2 1

[PATCH v4] dhcp, dhcpv6: Add hostname and client fqdn ops
by Enrique Llorente 19 Dec '24

19 Dec '24

Both DHCPv4 and DHCPv6 has the capability to pass the hostname to clients, the DHCPv4 uses option 12 (hostname) while the DHCPv6 uses option 39 (client fqdn), for some virt deployments like kubevirt is expected to have the VirtualMachine name as the guest hostname. This change add the following arguments: - -H --hostname NAME to configure the hostname DHCPv4 option(12) - --fqdn NAME to configure client fqdn option for both DHCPv4(81) and DHCPv6(39) Signed-off-by: Enrique Llorente <… [View More]ellorent(a)redhat.com> --- conf.c | 23 ++++++++++++++-- dhcp.c | 39 +++++++++++++++++++++++--- dhcpv6.c | 72 +++++++++++++++++++++++++++++++++++++++--------- passt.1 | 11 ++++++++ passt.h | 6 ++++ pasta.c | 15 ++++++++-- test/lib/setup | 10 +++---- test/passt.mbuto | 6 ++-- test/passt/dhcp | 15 +++++++++- util.c | 22 +++++++++++++++ util.h | 3 ++ 11 files changed, 191 insertions(+), 31 deletions(-) diff --git a/conf.c b/conf.c index df2b016..29e4bed 100644 --- a/conf.c +++ b/conf.c @@ -854,7 +854,9 @@ static void usage(const char *name, FILE *f, int status) FPRINTF(f, " default: use addresses from /etc/resolv.conf\n"); FPRINTF(f, " -S, --search LIST Space-separated list, search domains\n" - " a single, empty option disables the DNS search list\n"); + " a single, empty option disables the DNS search list\n" + " -H, --hostname NAME Hostname to configure client with\n" + " --fqdn NAME FQDN to configure client with\n"); if (strstr(name, "pasta")) FPRINTF(f, " default: don't use any search list\n"); else @@ -1313,6 +1315,7 @@ void conf(struct ctx *c, int argc, char **argv) {"outbound", required_argument, NULL, 'o' }, {"dns", required_argument, NULL, 'D' }, {"search", required_argument, NULL, 'S' }, + {"hostname", required_argument, NULL, 'H' }, {"no-tcp", no_argument, &c->no_tcp, 1 }, {"no-udp", no_argument, &c->no_udp, 1 }, {"no-icmp", no_argument, &c->no_icmp, 1 }, @@ -1357,6 +1360,7 @@ void conf(struct ctx *c, int argc, char **argv) /* vhost-user backend program convention */ {"print-capabilities", no_argument, NULL, 26 }, {"socket-path", required_argument, NULL, 's' }, + {"fqdn", required_argument, NULL, 27 }, { 0 }, }; const char *logname = (c->mode == MODE_PASTA) ? "pasta" : "passt"; @@ -1379,9 +1383,9 @@ void conf(struct ctx *c, int argc, char **argv) if (c->mode == MODE_PASTA) { c->no_dhcp_dns = c->no_dhcp_dns_search = 1; fwd_default = FWD_AUTO; - optstring = "+dqfel:hF:I:p:P:m:a:n:M:g:i:o:D:S:46t:u:T:U:"; + optstring = "+dqfel:hF:I:p:P:m:a:n:M:g:i:o:D:S:H:46t:u:T:U:"; } else { - optstring = "+dqfel:hs:F:p:P:m:a:n:M:g:i:o:D:S:461t:u:"; + optstring = "+dqfel:hs:F:p:P:m:a:n:M:g:i:o:D:S:H:461t:u:"; } c->tcp.fwd_in.mode = c->tcp.fwd_out.mode = FWD_UNSET; @@ -1558,6 +1562,12 @@ void conf(struct ctx *c, int argc, char **argv) case 26: vu_print_capabilities(); break; + case 27: + if (snprintf_check(c->fqdn, PASST_MAXDNAME, + "%s", optarg)) { + die("Invalid fqdn: %s", optarg); + } + break; case 'd': c->debug = 1; c->quiet = 0; @@ -1727,6 +1737,12 @@ void conf(struct ctx *c, int argc, char **argv) die("Cannot use DNS search domain %s", optarg); break; + case 'H': + if (snprintf_check(c->hostname, PASST_MAXDNAME, + "%s", optarg)) { + die("Invalid hostname: %s", optarg); + } + break; case '4': v4_only = true; v6_only = false; @@ -1741,6 +1757,7 @@ void conf(struct ctx *c, int argc, char **argv) c->one_off = true; break; + case 't': case 'u': case 'T': diff --git a/dhcp.c b/dhcp.c index d8515aa..a04462b 100644 --- a/dhcp.c +++ b/dhcp.c @@ -62,6 +62,7 @@ static struct opt opts[255]; #define DHCPFORCERENEW 9 #define OPT_MIN 60 /* RFC 951 */ +#define OPT_MAX 302 /* UDP packet limit - dhcp headers */ /** * dhcp_init() - Initialise DHCP options @@ -122,7 +123,7 @@ struct msg { uint8_t sname[64]; uint8_t file[128]; uint32_t magic; - uint8_t o[308]; + uint8_t o[OPT_MAX+2]; } __attribute__((__packed__)); /** @@ -131,14 +132,28 @@ struct msg { * @o: Option number * @offset: Current offset within options field, updated on insertion */ -static void fill_one(struct msg *m, int o, int *offset) +static int fill_one(struct msg *m, int o, int *offset) { + size_t idx, slen = 0; + + // We cannot write even enum + len + one byte then just skip + if (*offset + 2 > OPT_MAX) { + return OPT_MAX; + } m->o[*offset] = o; m->o[*offset + 1] = opts[o].slen; - memcpy(&m->o[*offset + 2], opts[o].s, opts[o].slen); + idx=*offset + 2; + slen=opts[o].slen; + + // Truncate if it goes beyond OPT_MAX + if (idx + slen > OPT_MAX) { + slen = OPT_MAX - idx; + } + memcpy(&m->o[*offset + 2], opts[o].s, slen); opts[o].sent = 1; *offset += 2 + opts[o].slen; + return *offset; } /** @@ -172,7 +187,9 @@ static int fill(struct msg *m) for (o = 0; o < 255; o++) { if (opts[o].slen != -1 && !opts[o].sent) - fill_one(m, o, &offset); + if (fill_one(m, o, &offset) == OPT_MAX) { + break; + } } m->o[offset++] = 255; @@ -398,6 +415,20 @@ int dhcp(const struct ctx *c, const struct pool *p) if (!opts[6].slen) opts[6].slen = -1; + size_t hostname_len = strlen(c->hostname); + if (hostname_len > 0) { + opts[12].slen = hostname_len; + memcpy(opts[12].s, &c->hostname, hostname_len); + } + + size_t fqdn_len = strlen(c->fqdn); + if (fqdn_len > 0) { + opts[81].s[0] = 0x4; // flags (E) + size_t encoded_fqdn_len = encode_domain_name(c->fqdn, fqdn_len, + (char *) opts[81].s + 3); + opts[81].slen = encoded_fqdn_len + 3; + } + if (!c->no_dhcp_dns_search) opt_set_dns_search(c, sizeof(m->o)); diff --git a/dhcpv6.c b/dhcpv6.c index 0523bba..b61a41d 100644 --- a/dhcpv6.c +++ b/dhcpv6.c @@ -48,6 +48,7 @@ struct opt_hdr { # define STATUS_NOTONLINK htons_constant(4) # define OPT_DNS_SERVERS htons_constant(23) # define OPT_DNS_SEARCH htons_constant(24) +# define OPT_CLIENT_FQDN htons_constant(39) #define STR_NOTONLINK "Prefix not appropriate for link." uint16_t l; @@ -163,6 +164,18 @@ struct opt_dns_search { char list[MAXDNSRCH * NS_MAXDNAME]; } __attribute__((packed)); +/** + * struct opt_client_fqdn - Client FQDN option (RFC 4704) + * @hdr: Option header + * @flags: Flags as stated at RFC 4704 (always zero for us) + * @domain_name: Client FQDN + */ +struct opt_client_fqdn{ + struct opt_hdr hdr; + uint8_t flags; + char domain_name[PASST_MAXDNAME]; +} __attribute__((packed)); + /** * struct msg_hdr - DHCPv6 client/server message header * @type: DHCP message type @@ -193,6 +206,7 @@ struct msg_hdr { * @client_id: Client Identifier, variable length * @dns_servers: DNS Recursive Name Server, here just for storage size * @dns_search: Domain Search List, here just for storage size + * @client_fqdn: Client FQDN, variable length */ static struct resp_t { struct msg_hdr hdr; @@ -203,6 +217,7 @@ static struct resp_t { struct opt_client_id client_id; struct opt_dns_servers dns_servers; struct opt_dns_search dns_search; + struct opt_client_fqdn client_fqdn; } __attribute__((__packed__)) resp = { { 0 }, SERVER_ID, @@ -228,6 +243,10 @@ static struct resp_t { { { OPT_DNS_SEARCH, 0, }, { 0 }, }, + + { { OPT_CLIENT_FQDN, 0, }, + 0, { 0 }, + }, }; static const struct opt_status_code sc_not_on_link = { @@ -346,7 +365,6 @@ static size_t dhcpv6_dns_fill(const struct ctx *c, char *buf, int offset) { struct opt_dns_servers *srv = NULL; struct opt_dns_search *srch = NULL; - char *p = NULL; int i; if (c->no_dhcp_dns) @@ -388,29 +406,56 @@ search: offset += sizeof(struct opt_hdr); srch->hdr.t = OPT_DNS_SEARCH; srch->hdr.l = 0; - p = srch->list; } - *p = '.'; - p = stpncpy(p + 1, c->dns_search[i].n, name_len); - p++; - srch->hdr.l += name_len + 2; - offset += name_len + 2; + size_t encoded_name_len = encode_domain_name(c->dns_search[i].n, name_len, srch->list); + srch->hdr.l += encoded_name_len; + offset += encoded_name_len; } if (srch) { - for (i = 0; i < srch->hdr.l; i++) { - if (srch->list[i] == '.') { - srch->list[i] = strcspn(srch->list + i + 1, - "."); - } - } srch->hdr.l = htons(srch->hdr.l); } return offset; } +/** + * dhcpv6_client_fqdn_fill() - Fill in client FQDN option + * @c: Execution context + * @buf: Response message buffer where options will be appended + * @offset: Offset in message buffer for new options + * + * Return: updated length of response message buffer. + */ +static size_t dhcpv6_client_fqdn_fill(const struct ctx *c, char *buf, int offset) +{ + size_t fqdn_len, opt_hdr_len = 0; + + fqdn_len = strlen(c->fqdn); + opt_hdr_len = sizeof(struct opt_hdr); + + if (offset + opt_hdr_len + fqdn_len + 1 > 508) { + fqdn_len = 508 - (offset + opt_hdr_len + 1); + } + + if (fqdn_len == 0) { + return offset; + } + + + struct opt_client_fqdn *o = (struct opt_client_fqdn *)(buf + offset); + size_t encoded_fqdn_len = encode_domain_name(c->fqdn, fqdn_len, + o->domain_name); + size_t opt_len = encoded_fqdn_len + 1; + + o->hdr.t = OPT_CLIENT_FQDN; + o->hdr.l = htons(opt_len); + o->flags = 0x00; + + return offset + opt_hdr_len + opt_len; +} + /** * dhcpv6() - Check if this is a DHCPv6 message, reply as needed * @c: Execution context @@ -544,6 +589,7 @@ int dhcpv6(struct ctx *c, const struct pool *p, n = offsetof(struct resp_t, client_id) + sizeof(struct opt_hdr) + ntohs(client_id->l); n = dhcpv6_dns_fill(c, (char *)&resp, n); + n = dhcpv6_client_fqdn_fill(c, (char*)&resp, n); resp.hdr.xid = mh->xid; diff --git a/passt.1 b/passt.1 index d9cd33e..27e70a7 100644 --- a/passt.1 +++ b/passt.1 @@ -401,6 +401,17 @@ Enable IPv6-only operation. IPv4 traffic will be ignored. By default, IPv4 operation is enabled as long as at least an IPv4 route and an interface address are configured on a given host interface. +.TP +.BR \-H ", " \-\-hostname " " \fIname +Hostname to configure client with. +For dhcp client aware encode \fIname as DHCPv4 option 12 (hostname). + +.TP +.BR \-\-fqdn " " \fIname +FQDN to configure client with. +For dhcp client aware encode \fIname as dhcp client fqdn option, for DHCPv4 option 81 and for +DHCPv6 option 39. + .SS \fBpasst\fR-only options .TP diff --git a/passt.h b/passt.h index 0dd4efa..577e734 100644 --- a/passt.h +++ b/passt.h @@ -91,6 +91,7 @@ struct fqdn { char n[NS_MAXDNAME]; }; + #include <net/if.h> #include <linux/un.h> @@ -209,6 +210,8 @@ struct ip6_ctx { * @ifi4: Template interface for IPv4, -1: none, 0: IPv4 disabled * @ip: IPv4 configuration * @dns_search: DNS search list + * @hostname: Guest hostname + * @fqdn: Guest FQDN * @ifi6: Template interface for IPv6, -1: none, 0: IPv6 disabled * @ip6: IPv6 configuration * @pasta_ifn: Name of namespace interface for pasta @@ -268,6 +271,9 @@ struct ctx { struct ip4_ctx ip4; struct fqdn dns_search[MAXDNSRCH]; + + char hostname[PASST_MAXDNAME]; + char fqdn[PASST_MAXDNAME]; int ifi6; struct ip6_ctx ip6; diff --git a/pasta.c b/pasta.c index ff41c95..cdc9aa6 100644 --- a/pasta.c +++ b/pasta.c @@ -173,6 +173,7 @@ void pasta_open_ns(struct ctx *c, const char *netns) struct pasta_spawn_cmd_arg { const char *exe; char *const *argv; + struct ctx *c; }; /** @@ -187,6 +188,7 @@ static int pasta_spawn_cmd(void *arg) char hostname[HOST_NAME_MAX + 1] = HOSTNAME_PREFIX; const struct pasta_spawn_cmd_arg *a; sigset_t set; + size_t conf_hostname_len = 0; /* We run in a detached PID and mount namespace: mount /proc over */ if (mount("", "/proc", "proc", 0, NULL)) @@ -194,8 +196,15 @@ static int pasta_spawn_cmd(void *arg) if (write_file("/proc/sys/net/ipv4/ping_group_range", "0 0")) warn("Cannot set ping_group_range, ICMP requests might fail"); - - if (!gethostname(hostname + sizeof(HOSTNAME_PREFIX) - 1, + + a = (const struct pasta_spawn_cmd_arg *)arg; + + conf_hostname_len = strlen(a->c->hostname); + if (conf_hostname_len > 0) { + if (sethostname(a->c->hostname, conf_hostname_len)) + warn("Unable to set configured hostname"); + } + else if (!gethostname(hostname + sizeof(HOSTNAME_PREFIX) - 1, HOST_NAME_MAX + 1 - sizeof(HOSTNAME_PREFIX)) || errno == ENAMETOOLONG) { hostname[HOST_NAME_MAX] = '\0'; @@ -208,7 +217,6 @@ static int pasta_spawn_cmd(void *arg) sigaddset(&set, SIGUSR1); sigwaitinfo(&set, NULL); - a = (const struct pasta_spawn_cmd_arg *)arg; execvp(a->exe, a->argv); die_perror("Failed to start command or shell"); @@ -230,6 +238,7 @@ void pasta_start_ns(struct ctx *c, uid_t uid, gid_t gid, struct pasta_spawn_cmd_arg arg = { .exe = argv[0], .argv = argv, + .c = c, }; char uidmap[BUFSIZ], gidmap[BUFSIZ]; char *sh_argv[] = { NULL, NULL }; diff --git a/test/lib/setup b/test/lib/setup index 580825f..ee67152 100755 --- a/test/lib/setup +++ b/test/lib/setup @@ -49,7 +49,7 @@ setup_passt() { context_run passt "make clean" context_run passt "make valgrind" - context_run_bg passt "valgrind --max-stackframe=$((4 * 1024 * 1024)) --trace-children=yes --vgdb=no --error-exitcode=1 --suppressions=test/valgrind.supp ./passt ${__opts} -s ${STATESETUP}/passt.socket -f -t 10001 -u 10001 -P ${STATESETUP}/passt.pid" + context_run_bg passt "valgrind --max-stackframe=$((4 * 1024 * 1024)) --trace-children=yes --vgdb=no --error-exitcode=1 --suppressions=test/valgrind.supp ./passt ${__opts} -s ${STATESETUP}/passt.socket -f -t 10001 -u 10001 -H hostname1 --fqdn fqdn1.passt.test -P ${STATESETUP}/passt.pid" # pidfile isn't created until passt is listening wait_for [ -f "${STATESETUP}/passt.pid" ] @@ -160,11 +160,11 @@ setup_passt_in_ns() { if [ ${VALGRIND} -eq 1 ]; then context_run passt "make clean" context_run passt "make valgrind" - context_run_bg passt "valgrind --max-stackframe=$((4 * 1024 * 1024)) --trace-children=yes --vgdb=no --error-exitcode=1 --suppressions=test/valgrind.supp ./passt -f ${__opts} -s ${STATESETUP}/passt.socket -t 10001,10011,10021,10031 -u 10001,10011,10021,10031 -P ${STATESETUP}/passt.pid --map-host-loopback ${__map_ns4} --map-host-loopback ${__map_ns6}" + context_run_bg passt "valgrind --max-stackframe=$((4 * 1024 * 1024)) --trace-children=yes --vgdb=no --error-exitcode=1 --suppressions=test/valgrind.supp ./passt -f ${__opts} -s ${STATESETUP}/passt.socket -H hostname1 --fqdn fqdn1.passt.test -t 10001,10011,10021,10031 -u 10001,10011,10021,10031 -P ${STATESETUP}/passt.pid --map-host-loopback ${__map_ns4} --map-host-loopback ${__map_ns6}" else context_run passt "make clean" context_run passt "make" - context_run_bg passt "./passt -f ${__opts} -s ${STATESETUP}/passt.socket -t 10001,10011,10021,10031 -u 10001,10011,10021,10031 -P ${STATESETUP}/passt.pid --map-host-loopback ${__map_ns4} --map-host-loopback ${__map_ns6}" + context_run_bg passt "./passt -f ${__opts} -s ${STATESETUP}/passt.socket -H hostname1 --fqdn fqdn1.passt.test -t 10001,10011,10021,10031 -u 10001,10011,10021,10031 -P ${STATESETUP}/passt.pid --map-host-loopback ${__map_ns4} --map-host-loopback ${__map_ns6}" fi wait_for [ -f "${STATESETUP}/passt.pid" ] @@ -243,7 +243,7 @@ setup_two_guests() { [ ${TRACE} -eq 1 ] && __opts="${__opts} --trace" [ ${VHOST_USER} -eq 1 ] && __opts="${__opts} --vhost-user" - context_run_bg passt_1 "./passt -s ${STATESETUP}/passt_1.socket -P ${STATESETUP}/passt_1.pid -f ${__opts} -t 10001 -u 10001" + context_run_bg passt_1 "./passt -s ${STATESETUP}/passt_1.socket -P ${STATESETUP}/passt_1.pid -f ${__opts} --fqdn fqdn1.passt.test -H hostname1 -t 10001 -u 10001" wait_for [ -f "${STATESETUP}/passt_1.pid" ] __opts= @@ -252,7 +252,7 @@ setup_two_guests() { [ ${TRACE} -eq 1 ] && __opts="${__opts} --trace" [ ${VHOST_USER} -eq 1 ] && __opts="${__opts} --vhost-user" - context_run_bg passt_2 "./passt -s ${STATESETUP}/passt_2.socket -P ${STATESETUP}/passt_2.pid -f ${__opts} -t 10004 -u 10004" + context_run_bg passt_2 "./passt -s ${STATESETUP}/passt_2.socket -P ${STATESETUP}/passt_2.pid -f ${__opts} --hostname hostname2 --fqdn fqdn2 -t 10004 -u 10004" wait_for [ -f "${STATESETUP}/passt_2.pid" ] __vmem="$((${MEM_KIB} / 1024 / 4))" diff --git a/test/passt.mbuto b/test/passt.mbuto index 138d365..1e07693 100755 --- a/test/passt.mbuto +++ b/test/passt.mbuto @@ -13,7 +13,7 @@ PROGS="${PROGS:-ash,dash,bash ip mount ls insmod mkdir ln cat chmod lsmod modprobe find grep mknod mv rm umount jq iperf3 dhclient hostname sed tr chown sipcalc cut socat dd strace ping tail killall sleep sysctl - nproc tcp_rr tcp_crr udp_rr which tee seq bc sshd ssh-keygen cmp}" + nproc tcp_rr tcp_crr udp_rr which tee seq bc sshd ssh-keygen cmp env}" # OpenSSH 9.8 introduced split binaries, with sshd being the daemon, and # sshd-session the per-session program. We need the latter as well, and the path @@ -41,6 +41,7 @@ FIXUP="${FIXUP}"' #!/bin/sh LOG=/var/log/dhclient-script.log echo \${reason} \${interface} >> \$LOG +env >> \$LOG set >> \$LOG [ -n "\${new_interface_mtu}" ] && ip link set dev \${interface} mtu \${new_interface_mtu} @@ -54,7 +55,8 @@ set >> \$LOG [ -n "\${new_ip6_address}" ] && ip addr add \${new_ip6_address}/\${new_ip6_prefixlen} dev \${interface} [ -n "\${new_dhcp6_name_servers}" ] && for d in \${new_dhcp6_name_servers}; do echo "nameserver \${d}%\${interface}" >> /etc/resolv.conf; done [ -n "\${new_dhcp6_domain_search}" ] && (printf "search"; for d in \${new_dhcp6_domain_search}; do printf " %s" "\${d}"; done; printf "\n") >> /etc/resolv.conf -[ -n "\${new_host_name}" ] && hostname "\${new_host_name}" +[ -n "\${new_host_name}" ] && echo "\${new_host_name}" > /tmp/new_host_name +[ -n "\${new_fqdn_fqdn}" ] && echo "\${new_fqdn_fqdn}" > /tmp/new_fqdn_fqdn exit 0 EOF chmod 755 /sbin/dhclient-script diff --git a/test/passt/dhcp b/test/passt/dhcp index 9925ab9..145f1ba 100644 --- a/test/passt/dhcp +++ b/test/passt/dhcp @@ -11,7 +11,7 @@ # Copyright (c) 2021 Red Hat GmbH # Author: Stefano Brivio <sbrivio(a)redhat.com> -gtools ip jq dhclient sed tr +gtools ip jq dhclient sed tr hostname htools ip jq sed tr head test Interface name @@ -47,7 +47,16 @@ gout SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^searc hout HOST_SEARCH sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search $.*$/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/' check [ "__SEARCH__" = "__HOST_SEARCH__" ] +test DHCP: Hostname +gout NEW_HOST_NAME cat /tmp/new_host_name +check [ "__NEW_HOST_NAME__" = "hostname1" ] + +test DHCP: Client FQDN +gout NEW_FQDN_FQDN cat /tmp/new_fqdn_fqdn +check [ "__NEW_FQDN_FQDN__" = "fqdn1.passt.test" ] + test DHCPv6: address +guest rm /tmp/new_fqdn_fqdn guest /sbin/dhclient -6 __IFNAME__ # Wait for DAD to complete guest while ip -j -6 addr show tentative | jq -e '.[].addr_info'; do sleep 0.1; done @@ -70,3 +79,7 @@ test DHCPv6: search list gout SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search $.*$/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/' hout HOST_SEARCH6 sed 's/\. / /g' /etc/resolv.conf | sed 's/\.$//g' | sed -n 's/^search $.*$/\1/p' | tr ' \n' ',' | sed 's/,$//;s/$/\n/' check [ "__SEARCH6__" = "__HOST_SEARCH6__" ] + +test DHCPv6: Hostname +gout NEW_FQDN_FQDN cat /tmp/new_fqdn_fqdn +check [ "__NEW_FQDN_FQDN__" = "fqdn1.passt.test" ] diff --git a/util.c b/util.c index 11973c4..f3cf7b1 100644 --- a/util.c +++ b/util.c @@ -837,3 +837,25 @@ void raw_random(void *buf, size_t buflen) if (random_read < buflen) die("Unexpected EOF on random data source"); } +/** + * encode_domain_name() - Encode domain name according to RFC 1035, section 3.1 + * @domain_name: Input domain name to encode + * @len: Domain name length + * @buf: Buffer to fill in with encoded domain name + * + * Return: encoded domain name length + */ +size_t encode_domain_name(const char *domain_name, size_t len, char *buf){ + char *p = NULL; + size_t i = 0; + + buf[0] = strcspn(domain_name, "."); + p = buf + 1; + for (i = 0; i < len; i++) { + if (domain_name[i] == '.') + p[i] = strcspn(domain_name + i + 1, "."); + else + p[i] = domain_name[i]; + } + return len + 2; +} diff --git a/util.h b/util.h index 3fa1d12..d7751a8 100644 --- a/util.h +++ b/util.h @@ -346,4 +346,7 @@ static inline int wrap_accept4(int sockfd, struct sockaddr *addr, #define accept4(s, addr, addrlen, flags) \ wrap_accept4((s), (addr), (addrlen), (flags)) +#define PASST_MAXDNAME 253 /* RFC 1035 */ +size_t encode_domain_name(const char* domain_name, size_t len, char* buf); + #endif /* UTIL_H */ -- 2.47.0 [View Less]

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[PATCH] virtio: Use const pointer for vu_dev
by Laurent Vivier 17 Dec '24

17 Dec '24

We don't modify the structure in some virtio functions. Signed-off-by: Laurent Vivier <lvivier(a)redhat.com> --- virtio.c | 14 +++++++++----- virtio.h | 2 +- vu_common.c | 2 +- vu_common.h | 2 +- 4 files changed, 12 insertions(+), 8 deletions(-) diff --git a/virtio.c b/virtio.c index a76de5e00222..625bac385f0c 100644 --- a/virtio.c +++ b/virtio.c @@ -92,7 +92,8 @@ * * Return: virtual address in our address space of the guest physical address */ -static void *… [View More]vu_gpa_to_va(struct vu_dev *dev, uint64_t *plen, uint64_t guest_addr) +static void *vu_gpa_to_va(const struct vu_dev *dev, uint64_t *plen, + uint64_t guest_addr) { unsigned int i; @@ -210,7 +211,8 @@ static void virtqueue_get_head(const struct vu_virtq *vq, * * Return: -1 if there is an error, 0 otherwise */ -static int virtqueue_read_indirect_desc(struct vu_dev *dev, struct vring_desc *desc, +static int virtqueue_read_indirect_desc(const struct vu_dev *dev, + struct vring_desc *desc, uint64_t addr, size_t len) { uint64_t read_len; @@ -390,7 +392,7 @@ static inline void vring_set_avail_event(const struct vu_virtq *vq, * * Return: false on error, true otherwise */ -static bool virtqueue_map_desc(struct vu_dev *dev, +static bool virtqueue_map_desc(const struct vu_dev *dev, unsigned int *p_num_sg, struct iovec *iov, unsigned int max_num_sg, uint64_t pa, size_t sz) @@ -426,7 +428,8 @@ static bool virtqueue_map_desc(struct vu_dev *dev, * * Return: -1 if there is an error, 0 otherwise */ -static int vu_queue_map_desc(struct vu_dev *dev, struct vu_virtq *vq, unsigned int idx, +static int vu_queue_map_desc(const struct vu_dev *dev, + struct vu_virtq *vq, unsigned int idx, struct vu_virtq_element *elem) { const struct vring_desc *desc = vq->vring.desc; @@ -504,7 +507,8 @@ static int vu_queue_map_desc(struct vu_dev *dev, struct vu_virtq *vq, unsigned i * * Return: -1 if there is an error, 0 otherwise */ -int vu_queue_pop(struct vu_dev *dev, struct vu_virtq *vq, struct vu_virtq_element *elem) +int vu_queue_pop(const struct vu_dev *dev, struct vu_virtq *vq, + struct vu_virtq_element *elem) { unsigned int head; int ret; diff --git a/virtio.h b/virtio.h index 6410d60f9b3f..0af259df7dac 100644 --- a/virtio.h +++ b/virtio.h @@ -170,7 +170,7 @@ static inline bool vu_has_protocol_feature(const struct vu_dev *vdev, bool vu_queue_empty(struct vu_virtq *vq); void vu_queue_notify(const struct vu_dev *dev, struct vu_virtq *vq); -int vu_queue_pop(struct vu_dev *dev, struct vu_virtq *vq, +int vu_queue_pop(const struct vu_dev *dev, struct vu_virtq *vq, struct vu_virtq_element *elem); void vu_queue_detach_element(struct vu_virtq *vq); void vu_queue_unpop(struct vu_virtq *vq); diff --git a/vu_common.c b/vu_common.c index 299b5a32e244..6d365bea5fe2 100644 --- a/vu_common.c +++ b/vu_common.c @@ -73,7 +73,7 @@ void vu_init_elem(struct vu_virtq_element *elem, struct iovec *iov, int elem_cnt * * Return: number of elements used to contain the frame */ -int vu_collect(struct vu_dev *vdev, struct vu_virtq *vq, +int vu_collect(const struct vu_dev *vdev, struct vu_virtq *vq, struct vu_virtq_element *elem, int max_elem, size_t size, size_t *frame_size) { diff --git a/vu_common.h b/vu_common.h index 901d97216c67..bd70faf3e226 100644 --- a/vu_common.h +++ b/vu_common.h @@ -46,7 +46,7 @@ static inline void vu_set_element(struct vu_virtq_element *elem, void vu_init_elem(struct vu_virtq_element *elem, struct iovec *iov, int elem_cnt); -int vu_collect(struct vu_dev *vdev, struct vu_virtq *vq, +int vu_collect(const struct vu_dev *vdev, struct vu_virtq *vq, struct vu_virtq_element *elem, int max_elem, size_t size, size_t *frame_size); void vu_set_vnethdr(const struct vu_dev *vdev, -- 2.47.1 [View Less]

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passt: new version 2024_12_11.09478d5 available
by Stefano Brivio 12 Dec '24

12 Dec '24

The new version with tag 2024_12_11.09478d5 includes the following changes: 09478d5 treewide: Dodge dynamic memory allocation in strerror() from glibc > 2.40 e24f026 pasta: make it possible to disable socket splicing 947f5cd tap: Call vu_init() with --fd 2139ad3 tap: Use a common function to start a new connection 8996d18 udp_vu: update segment size 1908297 flow: Remove over-zealous sanity checks in flow_sidx_hash() 1db4f77 udp: Improve detail of UDP endpoint … [View More]

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