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[37.193.36.68]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-55b8898bd28sm830711e87.19.2025.08.01.20.42.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Aug 2025 20:42:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1754106125; x=1754710925; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=HA/sSTJ/TsrP8e7BaMtckKqvisPKBTmwGV5a6cGQNl8=; b=QSrpPa3U9ZUoaf4GkfTxLm7qD4NMsvN3pEagEPe2PRcvAKsKq9qhZpjLRnbICqcRoc M/YkX6aTPU3NUtKpftxiq8OAMN1ghjsKhHowIoeW6p4tPX9fVb1PZmS5f7ri6JWLtAiJ Knw5M5Cgxsvm1C3as9ii9DuY9OIRpVOKB7LB4X3ktyvGfV8VlvZLoA4yqZwRzFQqaTsu VyzcrM0YlYQPL63pS56KoLb2HHr9apwMsPSdvFNgpVp/ivMOvdm6nnXLnFOgOVTwC26S 8Ulp4D3PRA3VsxhPfJD5TkFC59fdSMNUxqAbhiIivSirXlsSoi0TEZC/IKxVxjMtZdg9 iDbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754106125; x=1754710925; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=HA/sSTJ/TsrP8e7BaMtckKqvisPKBTmwGV5a6cGQNl8=; b=WVu/CiNWaIGYw9ZzbnfN00nEAGIT8ArvbHT6Fnwwb2b5Y1lVyBrzByhem4MNQJPSQq SxcAJrp6vE8XUVlBiL//blfbf/NnIG1pPGPaa2sgMYlq7zH83m2dEvFugQyZqk24T4H7 cGgR6p0BFJTz86LTL/Oo6CA2rbsjuOrTSNxxVLjgF1V/YmcwMNlFTdmzpoUu2Th6HdSk /2+JVOUMH+IwSY4m1btdnu2hIcfagdf2OOAJaZBo5y5Fdq1o2EP/PRuZakeuGY73wqf4 mKeQi04m9Gxhyyb4yHWTGSGmGqOfMxQ3xIfGV7Qyb8vLSRnTuPk0F83JxoGm0qg6Q6h7 IsMQ== X-Gm-Message-State: AOJu0Yy56ji6j4+bG8PWqaoBSug3TvVwZEWepN5KQnnc2FLa+a5J6JNV XkiILO+dFC1PJ78A5F7HeEPX3QbvVtGx7TVnpkVJ7wqN0pv50j4tqtZoBB/8ZwRR X-Gm-Gg: ASbGncv+iHrLGDJBDEuH3TlhhhFFzMcniPdlvIvpFJlNRMo97YAG3ug7Z8va/FgAuMm gFHNAeprUpnmKsHzrY/Il8WOW2MYsvb6F/gC1kzeY1iVKSdVA+3az3gIS44ltcZLqv9Ac61uBk3 +OuvL6mmcV6fTpMzfkrkt3Hen/W8Ax5tDFptAvCld5R9ndxmAA/ctNSKlRtERf97TXnldGKcZuc 0ZufVdNN3GBSJeVonwvufWFIlWYrFdjkwMeoEIk6aGPIz3OT8bVt/40mo/Doudg4P/PiaemGyNz vVTjniZ1D2Y5s2XYjQ2twHZeyE8j++VdpoaqsOQUb10HuP0nvvM1lqyQvPXwTKcHYAjBNJZYE81 F5xCC8Iy127MygwF68X5ShVQ5tPS8R6tbqsfxQYM+CLKSc7Q= X-Google-Smtp-Source: AGHT+IEZFUKdZR6c1vwIOHTUrL0O0LumK1Qqq9bHpNzd930u5KdxogzZocdU5doqUJavyFc9TQCbYQ== X-Received: by 2002:a05:6512:1252:b0:55b:941d:bde3 with SMTP id 2adb3069b0e04-55b97a67c13mr554810e87.10.1754106124496; Fri, 01 Aug 2025 20:42:04 -0700 (PDT) From: Viktor Kurilko To: qemu-devel@nongnu.org Cc: samuel.thibault@ens-lyon.org, Viktor Kurilko Subject: [PATCH] Add a feature for mapping a host unix socket to a guest tcp socket Date: Sat, 2 Aug 2025 10:41:54 +0700 Message-ID: <20250802034154.7834-1-murlockkinght@gmail.com> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::12c; envelope-from=murlockkinght@gmail.com; helo=mail-lf1-x12c.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sat, 02 Aug 2025 00:41:32 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1754109777964124100 Content-Type: text/plain; charset="utf-8" This patch adds the ability to map a host unix socket to a guest tcp socket= when using the slirp backend. This feature was added in libslirp version 4.7.0. Signed-off-by: Viktor Kurilko --- net/slirp.c | 65 ++++++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 52 insertions(+), 13 deletions(-) diff --git a/net/slirp.c b/net/slirp.c index 9657e86a84..fc03e58402 100644 --- a/net/slirp.c +++ b/net/slirp.c @@ -795,12 +795,16 @@ void hmp_hostfwd_remove(Monitor *mon, const QDict *qd= ict) =20 static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **err= p) { - struct sockaddr_in host_addr =3D { - .sin_family =3D AF_INET, - .sin_addr =3D { - .s_addr =3D INADDR_ANY, - }, - }; + union { + struct sockaddr_in in; +#if !defined(WIN32) && SLIRP_CHECK_VERSION(4, 7, 0) + struct sockaddr_un un; +#endif + } host_addr =3D {0}; + host_addr.in.sin_family =3D AF_INET; + host_addr.in.sin_addr.s_addr =3D INADDR_ANY; + socklen_t host_addr_size =3D sizeof(host_addr.in); + struct sockaddr_in guest_addr =3D { .sin_family =3D AF_INET, .sin_addr =3D { @@ -833,7 +837,7 @@ static int slirp_hostfwd(SlirpState *s, const char *red= ir_str, Error **errp) fail_reason =3D "Missing : separator"; goto fail_syntax; } - if (buf[0] !=3D '\0' && !inet_aton(buf, &host_addr.sin_addr)) { + if (buf[0] !=3D '\0' && !inet_aton(buf, &host_addr.in.sin_addr)) { fail_reason =3D "Bad host address"; goto fail_syntax; } @@ -842,12 +846,47 @@ static int slirp_hostfwd(SlirpState *s, const char *r= edir_str, Error **errp) fail_reason =3D "Bad host port separator"; goto fail_syntax; } - err =3D qemu_strtoi(buf, &end, 0, &host_port); - if (err || host_port < 0 || host_port > 65535) { - fail_reason =3D "Bad host port"; - goto fail_syntax; +#if !defined(WIN32) && SLIRP_CHECK_VERSION(4, 7, 0) + if (buf[0] =3D=3D '/') { + if (is_udp) { + fail_reason =3D "Mapping unix to udp is not supported"; + goto fail_syntax; + } + if (strlen(buf) > sizeof(host_addr.un.sun_path)) { + fail_reason =3D "Unix socket path is too long"; + goto fail_syntax; + } + if (access(buf, F_OK) =3D=3D 0) { + struct stat st; + if (stat(buf, &st) < 0) { + error_setg_errno(errp, errno, "Failed to stat '%s'", buf); + goto fail_syntax; + } + + if (!S_ISSOCK(st.st_mode)) { + fail_reason =3D "file exists and it's not unix socket"; + goto fail_syntax; + } + + if (unlink(buf) < 0) { + error_setg_errno(errp, errno, "Failed to unlink '%s'", buf= ); + goto fail_syntax; + } + } + + host_addr.un.sun_family =3D AF_UNIX; + memcpy(host_addr.un.sun_path, buf, sizeof(host_addr.un.sun_path)); + host_addr_size =3D sizeof(host_addr.un); + } else +#endif + { + err =3D qemu_strtoi(buf, &end, 0, &host_port); + if (err || host_port < 0 || host_port > 65535) { + fail_reason =3D "Bad host port"; + goto fail_syntax; + } + host_addr.in.sin_port =3D htons(host_port); } - host_addr.sin_port =3D htons(host_port); =20 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { fail_reason =3D "Missing guest address"; @@ -867,7 +906,7 @@ static int slirp_hostfwd(SlirpState *s, const char *red= ir_str, Error **errp) =20 #if SLIRP_CHECK_VERSION(4, 5, 0) err =3D slirp_add_hostxfwd(s->slirp, - (struct sockaddr *) &host_addr, sizeof(host_addr), + (struct sockaddr *) &host_addr, host_addr_size, (struct sockaddr *) &guest_addr, sizeof(guest_addr), is_udp ? SLIRP_HOSTFWD_UDP : 0); #else --=20 2.50.1